[37] | 1 | /* |
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| 2 | |
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| 3 | The interface routines for reading and writing PLY polygon files. |
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| 4 | |
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| 5 | Greg Turk, February 1994 |
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| 6 | |
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| 7 | --------------------------------------------------------------- |
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| 8 | |
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| 9 | A PLY file contains a single polygonal _object_. |
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| 10 | |
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| 11 | An object is composed of lists of _elements_. Typical elements are |
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| 12 | vertices, faces, edges and materials. |
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| 13 | |
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| 14 | Each type of element for a given object has one or more _properties_ |
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| 15 | associated with the element type. For instance, a vertex element may |
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| 16 | have as properties the floating-point values x,y,z and the three unsigned |
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| 17 | chars representing red, green and blue. |
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| 18 | |
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| 19 | --------------------------------------------------------------- |
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| 20 | |
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| 21 | Copyright (c) 1994 The Board of Trustees of The Leland Stanford |
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| 22 | Junior University. All rights reserved. |
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| 23 | |
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| 24 | Permission to use, copy, modify and distribute this software and its |
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| 25 | documentation for any purpose is hereby granted without fee, provided |
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| 26 | that the above copyright notice and this permission notice appear in |
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| 27 | all copies of this software and that you do not sell the software. |
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| 28 | |
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| 29 | THE SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND, |
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| 30 | EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY |
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| 31 | WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. |
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| 32 | |
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| 33 | */ |
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| 34 | |
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| 35 | #include <stdio.h> |
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| 36 | #include <stdlib.h> |
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| 37 | #include <math.h> |
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| 38 | #include <string.h> |
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| 39 | #include <fcntl.h> |
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| 40 | #include "ply.h" |
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| 41 | |
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| 42 | char *type_names[] = { |
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| 43 | "invalid", |
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| 44 | "char", "short", "int", |
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| 45 | "uchar", "ushort", "uint", |
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| 46 | "float", "double", |
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| 47 | }; |
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| 48 | |
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| 49 | int ply_type_size[] = { |
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| 50 | 0, 1, 2, 4, 1, 2, 4, 4, 8 |
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| 51 | }; |
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| 52 | |
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| 53 | #define NO_OTHER_PROPS -1 |
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| 54 | |
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| 55 | #define DONT_STORE_PROP 0 |
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| 56 | #define STORE_PROP 1 |
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| 57 | |
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| 58 | #define OTHER_PROP 0 |
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| 59 | #define NAMED_PROP 1 |
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| 60 | |
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| 61 | /* memory allocation */ |
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| 62 | char *my_alloc(); |
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| 63 | #define myalloc(mem_size) my_alloc((mem_size), __LINE__, __FILE__) |
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| 64 | |
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| 65 | /* returns 1 if strings are equal, 0 if not */ |
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| 66 | int equal_strings(char *, char *); |
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| 67 | |
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| 68 | /* find an element in a plyfile's list */ |
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| 69 | PlyElement *find_element(PlyFile *, char *); |
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| 70 | |
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| 71 | /* find a property in an element's list */ |
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| 72 | PlyProperty *find_property(PlyElement *, char *, int *); |
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| 73 | |
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| 74 | /* write to a file the word describing a PLY file data type */ |
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| 75 | void write_scalar_type (FILE *, int); |
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| 76 | |
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| 77 | /* read a line from a file and break it up into separate words */ |
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| 78 | char **get_words(FILE *, int *, char **); |
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| 79 | char **old_get_words(FILE *, int *); |
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| 80 | |
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| 81 | /* write an item to a file */ |
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| 82 | void write_binary_item(FILE *, int, unsigned int, double, int, int); |
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| 83 | void write_ascii_item(FILE *, int, unsigned int, double, int); |
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| 84 | double old_write_ascii_item(FILE *, char *, int); |
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| 85 | |
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| 86 | /* add information to a PLY file descriptor */ |
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| 87 | void add_element(PlyFile *, char **, int); |
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| 88 | void add_property(PlyFile *, char **, int); |
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| 89 | void add_comment(PlyFile *, char *); |
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| 90 | void add_obj_info(PlyFile *, char *); |
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| 91 | |
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| 92 | /* copy a property */ |
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| 93 | void copy_property(PlyProperty *, PlyProperty *); |
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| 94 | |
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| 95 | /* store a value into where a pointer and a type specify */ |
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| 96 | void store_item(char *, int, int, unsigned int, double); |
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| 97 | |
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| 98 | /* return the value of a stored item */ |
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| 99 | void get_stored_item( void *, int, int *, unsigned int *, double *); |
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| 100 | |
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| 101 | /* return the value stored in an item, given ptr to it and its type */ |
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| 102 | double get_item_value(char *, int); |
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| 103 | |
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| 104 | /* get binary or ascii item and store it according to ptr and type */ |
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| 105 | void get_ascii_item(char *, int, int *, unsigned int *, double *); |
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| 106 | void get_binary_item(FILE *, int, int *, unsigned int *, double *, int); |
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| 107 | |
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| 108 | /* get a bunch of elements from a file */ |
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| 109 | void ascii_get_element(PlyFile *, char *, int); |
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| 110 | void binary_get_element(PlyFile *, char *, int); |
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| 111 | |
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| 112 | |
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| 113 | /*************/ |
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| 114 | /* Writing */ |
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| 115 | /*************/ |
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| 116 | |
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| 117 | |
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| 118 | /****************************************************************************** |
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| 119 | Given a file pointer, get ready to write PLY data to the file. |
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| 120 | |
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| 121 | Entry: |
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| 122 | fp - the given file pointer |
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| 123 | nelems - number of elements in object |
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| 124 | elem_names - list of element names |
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| 125 | file_type - file type, either ascii or binary |
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| 126 | |
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| 127 | Exit: |
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| 128 | returns a pointer to a PlyFile, used to refer to this file, or NULL if error |
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| 129 | ******************************************************************************/ |
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| 130 | |
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| 131 | PlyFile *ply_write( |
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| 132 | FILE *fp, |
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| 133 | int nelems, |
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| 134 | char **elem_names, |
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| 135 | int file_type |
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| 136 | ) |
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| 137 | { |
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| 138 | int i; |
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| 139 | PlyFile *plyfile; |
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| 140 | PlyElement *elem; |
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| 141 | |
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| 142 | /* check for NULL file pointer */ |
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| 143 | if (fp == NULL) |
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| 144 | return (NULL); |
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| 145 | |
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| 146 | #ifdef WIN32 |
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| 147 | /* Make sure file has the correct (ascii/binary) mode */ |
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| 148 | if (file_type == PLY_ASCII) |
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| 149 | setmode(fileno(fp), _O_TEXT); |
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| 150 | else |
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| 151 | setmode(fileno(fp), _O_BINARY); |
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| 152 | #endif |
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| 153 | |
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| 154 | /* create a record for this object */ |
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| 155 | |
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| 156 | plyfile = (PlyFile *) myalloc (sizeof (PlyFile)); |
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| 157 | plyfile->file_type = file_type; |
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| 158 | plyfile->num_comments = 0; |
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| 159 | plyfile->num_obj_info = 0; |
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| 160 | plyfile->nelems = nelems; |
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| 161 | plyfile->version = 1.0; |
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| 162 | plyfile->fp = fp; |
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| 163 | plyfile->other_elems = NULL; |
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| 164 | |
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| 165 | /* tuck aside the names of the elements */ |
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| 166 | |
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| 167 | plyfile->elems = (PlyElement **) myalloc (sizeof (PlyElement *) * nelems); |
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| 168 | for (i = 0; i < nelems; i++) { |
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| 169 | elem = (PlyElement *) myalloc (sizeof (PlyElement)); |
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| 170 | plyfile->elems[i] = elem; |
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| 171 | elem->name = strdup (elem_names[i]); |
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| 172 | elem->num = 0; |
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| 173 | elem->nprops = 0; |
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| 174 | } |
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| 175 | |
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| 176 | /* return pointer to the file descriptor */ |
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| 177 | return (plyfile); |
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| 178 | } |
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| 179 | |
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| 180 | |
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| 181 | /****************************************************************************** |
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| 182 | Open a polygon file for writing. |
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| 183 | |
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| 184 | Entry: |
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| 185 | filename - name of file to read from |
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| 186 | nelems - number of elements in object |
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| 187 | elem_names - list of element names |
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| 188 | file_type - file type, either ascii or binary |
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| 189 | |
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| 190 | Exit: |
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| 191 | version - version number of PLY file |
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| 192 | returns a file identifier, used to refer to this file, or NULL if error |
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| 193 | ******************************************************************************/ |
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| 194 | |
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| 195 | PlyFile *ply_open_for_writing( |
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| 196 | const char *filename, |
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| 197 | int nelems, |
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| 198 | char **elem_names, |
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| 199 | int file_type, |
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| 200 | float *version |
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| 201 | ) |
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| 202 | { |
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| 203 | int i; |
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| 204 | PlyFile *plyfile; |
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| 205 | PlyElement *elem; |
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| 206 | char *name; |
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| 207 | FILE *fp; |
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| 208 | |
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| 209 | /* tack on the extension .ply, if necessary */ |
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| 210 | |
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| 211 | name = (char *) myalloc (sizeof (char) * (strlen (filename) + 5)); |
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| 212 | strcpy (name, filename); |
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| 213 | if (strlen (name) < 4 || |
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| 214 | strcmp (name + strlen (name) - 4, ".ply") != 0) |
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| 215 | strcat (name, ".ply"); |
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| 216 | |
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| 217 | /* open the file for writing */ |
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| 218 | |
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| 219 | fp = fopen (name, "w"); |
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| 220 | if (fp == NULL) { |
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| 221 | return (NULL); |
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| 222 | } |
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| 223 | |
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| 224 | /* create the actual PlyFile structure */ |
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| 225 | |
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| 226 | plyfile = ply_write (fp, nelems, elem_names, file_type); |
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| 227 | if (plyfile == NULL) |
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| 228 | return (NULL); |
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| 229 | |
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| 230 | /* say what PLY file version number we're writing */ |
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| 231 | *version = plyfile->version; |
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| 232 | |
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| 233 | /* return pointer to the file descriptor */ |
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| 234 | return (plyfile); |
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| 235 | } |
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| 236 | |
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| 237 | |
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| 238 | /****************************************************************************** |
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| 239 | Describe an element, including its properties and how many will be written |
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| 240 | to the file. |
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| 241 | |
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| 242 | Entry: |
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| 243 | plyfile - file identifier |
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| 244 | elem_name - name of element that information is being specified about |
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| 245 | nelems - number of elements of this type to be written |
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| 246 | nprops - number of properties contained in the element |
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| 247 | prop_list - list of properties |
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| 248 | ******************************************************************************/ |
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| 249 | |
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| 250 | void ply_describe_element( |
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| 251 | PlyFile *plyfile, |
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| 252 | char *elem_name, |
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| 253 | int nelems, |
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| 254 | int nprops, |
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| 255 | PlyProperty *prop_list |
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| 256 | ) |
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| 257 | { |
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| 258 | int i; |
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| 259 | PlyElement *elem; |
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| 260 | PlyProperty *prop; |
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| 261 | |
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| 262 | /* look for appropriate element */ |
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| 263 | elem = find_element (plyfile, elem_name); |
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| 264 | if (elem == NULL) { |
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| 265 | fprintf(stderr,"ply_describe_element: can't find element '%s'\n",elem_name); |
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| 266 | exit (-1); |
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| 267 | } |
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| 268 | |
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| 269 | elem->num = nelems; |
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| 270 | |
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| 271 | /* copy the list of properties */ |
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| 272 | |
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| 273 | elem->nprops = nprops; |
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| 274 | elem->props = (PlyProperty **) myalloc (sizeof (PlyProperty *) * nprops); |
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| 275 | elem->store_prop = (char *) myalloc (sizeof (char) * nprops); |
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| 276 | |
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| 277 | for (i = 0; i < nprops; i++) { |
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| 278 | prop = (PlyProperty *) myalloc (sizeof (PlyProperty)); |
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| 279 | elem->props[i] = prop; |
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| 280 | elem->store_prop[i] = NAMED_PROP; |
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| 281 | copy_property (prop, &prop_list[i]); |
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| 282 | } |
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| 283 | } |
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| 284 | |
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| 285 | |
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| 286 | /****************************************************************************** |
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| 287 | Describe a property of an element. |
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| 288 | |
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| 289 | Entry: |
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| 290 | plyfile - file identifier |
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| 291 | elem_name - name of element that information is being specified about |
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| 292 | prop - the new property |
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| 293 | ******************************************************************************/ |
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| 294 | |
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| 295 | void ply_describe_property( |
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| 296 | PlyFile *plyfile, |
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| 297 | char *elem_name, |
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| 298 | PlyProperty *prop |
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| 299 | ) |
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| 300 | { |
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| 301 | PlyElement *elem; |
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| 302 | PlyProperty *elem_prop; |
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| 303 | |
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| 304 | /* look for appropriate element */ |
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| 305 | elem = find_element (plyfile, elem_name); |
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| 306 | if (elem == NULL) { |
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| 307 | fprintf(stderr, "ply_describe_property: can't find element '%s'\n", |
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| 308 | elem_name); |
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| 309 | return; |
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| 310 | } |
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| 311 | |
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| 312 | /* create room for new property */ |
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| 313 | |
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| 314 | if (elem->nprops == 0) { |
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| 315 | elem->props = (PlyProperty **) myalloc (sizeof (PlyProperty *)); |
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| 316 | elem->store_prop = (char *) myalloc (sizeof (char)); |
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| 317 | elem->nprops = 1; |
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| 318 | } |
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| 319 | else { |
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| 320 | elem->nprops++; |
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| 321 | elem->props = (PlyProperty **) |
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| 322 | realloc (elem->props, sizeof (PlyProperty *) * elem->nprops); |
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| 323 | elem->store_prop = (char *) |
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| 324 | realloc (elem->store_prop, sizeof (char) * elem->nprops); |
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| 325 | } |
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| 326 | |
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| 327 | /* copy the new property */ |
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| 328 | |
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| 329 | elem_prop = (PlyProperty *) myalloc (sizeof (PlyProperty)); |
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| 330 | elem->props[elem->nprops - 1] = elem_prop; |
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| 331 | elem->store_prop[elem->nprops - 1] = NAMED_PROP; |
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| 332 | copy_property (elem_prop, prop); |
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| 333 | } |
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| 334 | |
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| 335 | |
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| 336 | /****************************************************************************** |
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| 337 | Describe what the "other" properties are that are to be stored, and where |
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| 338 | they are in an element. |
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| 339 | ******************************************************************************/ |
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| 340 | |
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| 341 | void ply_describe_other_properties( |
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| 342 | PlyFile *plyfile, |
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| 343 | PlyOtherProp *other, |
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| 344 | int offset |
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| 345 | ) |
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| 346 | { |
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| 347 | int i; |
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| 348 | PlyElement *elem; |
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| 349 | PlyProperty *prop; |
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| 350 | |
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| 351 | /* look for appropriate element */ |
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| 352 | elem = find_element (plyfile, other->name); |
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| 353 | if (elem == NULL) { |
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| 354 | fprintf(stderr, "ply_describe_other_properties: can't find element '%s'\n", |
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| 355 | other->name); |
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| 356 | return; |
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| 357 | } |
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| 358 | |
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| 359 | /* create room for other properties */ |
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| 360 | |
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| 361 | if (elem->nprops == 0) { |
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| 362 | elem->props = (PlyProperty **) |
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| 363 | myalloc (sizeof (PlyProperty *) * other->nprops); |
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| 364 | elem->store_prop = (char *) myalloc (sizeof (char) * other->nprops); |
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| 365 | elem->nprops = 0; |
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| 366 | } |
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| 367 | else { |
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| 368 | int newsize; |
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| 369 | newsize = elem->nprops + other->nprops; |
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| 370 | elem->props = (PlyProperty **) |
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| 371 | realloc (elem->props, sizeof (PlyProperty *) * newsize); |
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| 372 | elem->store_prop = (char *) |
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| 373 | realloc (elem->store_prop, sizeof (char) * newsize); |
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| 374 | } |
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| 375 | |
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| 376 | /* copy the other properties */ |
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| 377 | |
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| 378 | for (i = 0; i < other->nprops; i++) { |
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| 379 | prop = (PlyProperty *) myalloc (sizeof (PlyProperty)); |
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| 380 | copy_property (prop, other->props[i]); |
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| 381 | elem->props[elem->nprops] = prop; |
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| 382 | elem->store_prop[elem->nprops] = OTHER_PROP; |
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| 383 | elem->nprops++; |
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| 384 | } |
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| 385 | |
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| 386 | /* save other info about other properties */ |
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| 387 | elem->other_size = other->size; |
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| 388 | elem->other_offset = offset; |
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| 389 | } |
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| 390 | |
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| 391 | |
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| 392 | /****************************************************************************** |
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| 393 | State how many of a given element will be written. |
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| 394 | |
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| 395 | Entry: |
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| 396 | plyfile - file identifier |
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| 397 | elem_name - name of element that information is being specified about |
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| 398 | nelems - number of elements of this type to be written |
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| 399 | ******************************************************************************/ |
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| 400 | |
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| 401 | void ply_element_count( |
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| 402 | PlyFile *plyfile, |
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| 403 | char *elem_name, |
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| 404 | int nelems |
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| 405 | ) |
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| 406 | { |
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| 407 | int i; |
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| 408 | PlyElement *elem; |
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| 409 | PlyProperty *prop; |
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| 410 | |
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| 411 | /* look for appropriate element */ |
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| 412 | elem = find_element (plyfile, elem_name); |
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| 413 | if (elem == NULL) { |
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| 414 | fprintf(stderr,"ply_element_count: can't find element '%s'\n",elem_name); |
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| 415 | exit (-1); |
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| 416 | } |
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| 417 | |
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| 418 | elem->num = nelems; |
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| 419 | } |
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| 420 | |
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| 421 | |
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| 422 | /****************************************************************************** |
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| 423 | Signal that we've described everything a PLY file's header and that the |
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| 424 | header should be written to the file. |
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| 425 | |
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| 426 | Entry: |
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| 427 | plyfile - file identifier |
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| 428 | ******************************************************************************/ |
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| 429 | |
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| 430 | void ply_header_complete(PlyFile *plyfile) |
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| 431 | { |
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| 432 | int i,j; |
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| 433 | FILE *fp = plyfile->fp; |
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| 434 | PlyElement *elem; |
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| 435 | PlyProperty *prop; |
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| 436 | |
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| 437 | fprintf (fp, "ply\n"); |
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| 438 | |
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| 439 | switch (plyfile->file_type) { |
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| 440 | case PLY_ASCII: |
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| 441 | fprintf (fp, "format ascii 1.0\n"); |
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| 442 | break; |
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| 443 | case PLY_BINARY_BE: |
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| 444 | fprintf (fp, "format binary_big_endian 1.0\n"); |
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| 445 | break; |
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| 446 | case PLY_BINARY_LE: |
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| 447 | fprintf (fp, "format binary_little_endian 1.0\n"); |
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| 448 | break; |
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| 449 | default: |
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| 450 | fprintf (stderr, "ply_header_complete: bad file type = %d\n", |
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| 451 | plyfile->file_type); |
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| 452 | exit (-1); |
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| 453 | } |
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| 454 | |
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| 455 | /* write out the comments */ |
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| 456 | |
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| 457 | for (i = 0; i < plyfile->num_comments; i++) |
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| 458 | fprintf (fp, "comment %s\n", plyfile->comments[i]); |
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| 459 | |
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| 460 | /* write out object information */ |
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| 461 | |
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| 462 | for (i = 0; i < plyfile->num_obj_info; i++) |
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| 463 | fprintf (fp, "obj_info %s\n", plyfile->obj_info[i]); |
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| 464 | |
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| 465 | /* write out information about each element */ |
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| 466 | |
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| 467 | for (i = 0; i < plyfile->nelems; i++) { |
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| 468 | |
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| 469 | elem = plyfile->elems[i]; |
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| 470 | fprintf (fp, "element %s %d\n", elem->name, elem->num); |
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| 471 | |
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| 472 | /* write out each property */ |
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| 473 | for (j = 0; j < elem->nprops; j++) { |
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| 474 | prop = elem->props[j]; |
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| 475 | if (prop->is_list) { |
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| 476 | fprintf (fp, "property list "); |
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| 477 | write_scalar_type (fp, prop->count_external); |
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| 478 | fprintf (fp, " "); |
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| 479 | write_scalar_type (fp, prop->external_type); |
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| 480 | fprintf (fp, " %s\n", prop->name); |
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| 481 | } |
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| 482 | else { |
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| 483 | fprintf (fp, "property "); |
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| 484 | write_scalar_type (fp, prop->external_type); |
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| 485 | fprintf (fp, " %s\n", prop->name); |
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| 486 | } |
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| 487 | } |
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| 488 | } |
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| 489 | |
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| 490 | fprintf (fp, "end_header\n"); |
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| 491 | } |
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| 492 | |
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| 493 | |
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| 494 | /****************************************************************************** |
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| 495 | Specify which elements are going to be written. This should be called |
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| 496 | before a call to the routine ply_put_element(). |
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| 497 | |
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| 498 | Entry: |
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| 499 | plyfile - file identifier |
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| 500 | elem_name - name of element we're talking about |
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| 501 | ******************************************************************************/ |
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| 502 | |
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| 503 | void ply_put_element_setup(PlyFile *plyfile, char *elem_name) |
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| 504 | { |
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| 505 | PlyElement *elem; |
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| 506 | |
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| 507 | elem = find_element (plyfile, elem_name); |
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| 508 | if (elem == NULL) { |
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| 509 | fprintf(stderr, "ply_elements_setup: can't find element '%s'\n", elem_name); |
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| 510 | exit (-1); |
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| 511 | } |
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| 512 | |
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| 513 | plyfile->which_elem = elem; |
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| 514 | } |
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| 515 | |
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| 516 | |
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| 517 | /****************************************************************************** |
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| 518 | Write an element to the file. This routine assumes that we're |
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| 519 | writing the type of element specified in the last call to the routine |
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| 520 | ply_put_element_setup(). |
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| 521 | |
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| 522 | Entry: |
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| 523 | plyfile - file identifier |
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| 524 | elem_ptr - pointer to the element |
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| 525 | ******************************************************************************/ |
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| 526 | |
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| 527 | void ply_put_element(PlyFile *plyfile, void *elem_ptr) |
---|
| 528 | { |
---|
| 529 | int i,j,k; |
---|
| 530 | FILE *fp = plyfile->fp; |
---|
| 531 | PlyElement *elem; |
---|
| 532 | PlyProperty *prop; |
---|
| 533 | char *elem_data,*item; |
---|
| 534 | char **item_ptr; |
---|
| 535 | int list_count; |
---|
| 536 | int item_size; |
---|
| 537 | int int_val; |
---|
| 538 | unsigned int uint_val; |
---|
| 539 | double double_val; |
---|
| 540 | char **other_ptr; |
---|
| 541 | |
---|
| 542 | elem = plyfile->which_elem; |
---|
| 543 | elem_data = elem_ptr; |
---|
| 544 | other_ptr = (char **) (((char *) elem_ptr) + elem->other_offset); |
---|
| 545 | |
---|
| 546 | /* write out either to an ascii or binary file */ |
---|
| 547 | |
---|
| 548 | if (plyfile->file_type == PLY_ASCII) { |
---|
| 549 | |
---|
| 550 | /* write an ascii file */ |
---|
| 551 | |
---|
| 552 | /* write out each property of the element */ |
---|
| 553 | for (j = 0; j < elem->nprops; j++) { |
---|
| 554 | prop = elem->props[j]; |
---|
| 555 | if (elem->store_prop[j] == OTHER_PROP) |
---|
| 556 | elem_data = *other_ptr; |
---|
| 557 | else |
---|
| 558 | elem_data = elem_ptr; |
---|
| 559 | if (prop->is_list) { |
---|
| 560 | item = elem_data + prop->count_offset; |
---|
| 561 | get_stored_item ((void *) item, prop->count_internal, |
---|
| 562 | &int_val, &uint_val, &double_val); |
---|
| 563 | write_ascii_item (fp, int_val, uint_val, double_val, |
---|
| 564 | prop->count_external); |
---|
| 565 | list_count = uint_val; |
---|
| 566 | item_ptr = (char **) (elem_data + prop->offset); |
---|
| 567 | item = item_ptr[0]; |
---|
| 568 | item_size = ply_type_size[prop->internal_type]; |
---|
| 569 | for (k = 0; k < list_count; k++) { |
---|
| 570 | get_stored_item ((void *) item, prop->internal_type, |
---|
| 571 | &int_val, &uint_val, &double_val); |
---|
| 572 | write_ascii_item (fp, int_val, uint_val, double_val, |
---|
| 573 | prop->external_type); |
---|
| 574 | item += item_size; |
---|
| 575 | } |
---|
| 576 | } |
---|
| 577 | else { |
---|
| 578 | item = elem_data + prop->offset; |
---|
| 579 | get_stored_item ((void *) item, prop->internal_type, |
---|
| 580 | &int_val, &uint_val, &double_val); |
---|
| 581 | write_ascii_item (fp, int_val, uint_val, double_val, |
---|
| 582 | prop->external_type); |
---|
| 583 | } |
---|
| 584 | } |
---|
| 585 | |
---|
| 586 | fprintf (fp, "\n"); |
---|
| 587 | } |
---|
| 588 | else { |
---|
| 589 | |
---|
| 590 | /* write a binary file */ |
---|
| 591 | |
---|
| 592 | /* write out each property of the element */ |
---|
| 593 | for (j = 0; j < elem->nprops; j++) { |
---|
| 594 | prop = elem->props[j]; |
---|
| 595 | if (elem->store_prop[j] == OTHER_PROP) |
---|
| 596 | elem_data = *other_ptr; |
---|
| 597 | else |
---|
| 598 | elem_data = elem_ptr; |
---|
| 599 | if (prop->is_list) { |
---|
| 600 | item = elem_data + prop->count_offset; |
---|
| 601 | item_size = ply_type_size[prop->count_internal]; |
---|
| 602 | get_stored_item ((void *) item, prop->count_internal, |
---|
| 603 | &int_val, &uint_val, &double_val); |
---|
| 604 | write_binary_item (fp, int_val, uint_val, double_val, |
---|
| 605 | prop->count_external, plyfile->file_type); |
---|
| 606 | list_count = uint_val; |
---|
| 607 | item_ptr = (char **) (elem_data + prop->offset); |
---|
| 608 | item = item_ptr[0]; |
---|
| 609 | item_size = ply_type_size[prop->internal_type]; |
---|
| 610 | for (k = 0; k < list_count; k++) { |
---|
| 611 | get_stored_item ((void *) item, prop->internal_type, |
---|
| 612 | &int_val, &uint_val, &double_val); |
---|
| 613 | write_binary_item (fp, int_val, uint_val, double_val, |
---|
| 614 | prop->external_type, plyfile->file_type); |
---|
| 615 | item += item_size; |
---|
| 616 | } |
---|
| 617 | } |
---|
| 618 | else { |
---|
| 619 | item = elem_data + prop->offset; |
---|
| 620 | item_size = ply_type_size[prop->internal_type]; |
---|
| 621 | get_stored_item ((void *) item, prop->internal_type, |
---|
| 622 | &int_val, &uint_val, &double_val); |
---|
| 623 | write_binary_item (fp, int_val, uint_val, double_val, |
---|
| 624 | prop->external_type, plyfile->file_type); |
---|
| 625 | } |
---|
| 626 | } |
---|
| 627 | |
---|
| 628 | } |
---|
| 629 | } |
---|
| 630 | |
---|
| 631 | |
---|
| 632 | /****************************************************************************** |
---|
| 633 | Specify a comment that will be written in the header. |
---|
| 634 | |
---|
| 635 | Entry: |
---|
| 636 | plyfile - file identifier |
---|
| 637 | comment - the comment to be written |
---|
| 638 | ******************************************************************************/ |
---|
| 639 | |
---|
| 640 | void ply_put_comment(PlyFile *plyfile, char *comment) |
---|
| 641 | { |
---|
| 642 | /* (re)allocate space for new comment */ |
---|
| 643 | if (plyfile->num_comments == 0) |
---|
| 644 | plyfile->comments = (char **) myalloc (sizeof (char *)); |
---|
| 645 | else |
---|
| 646 | plyfile->comments = (char **) realloc (plyfile->comments, |
---|
| 647 | sizeof (char *) * (plyfile->num_comments + 1)); |
---|
| 648 | |
---|
| 649 | /* add comment to list */ |
---|
| 650 | plyfile->comments[plyfile->num_comments] = strdup (comment); |
---|
| 651 | plyfile->num_comments++; |
---|
| 652 | } |
---|
| 653 | |
---|
| 654 | |
---|
| 655 | /****************************************************************************** |
---|
| 656 | Specify a piece of object information (arbitrary text) that will be written |
---|
| 657 | in the header. |
---|
| 658 | |
---|
| 659 | Entry: |
---|
| 660 | plyfile - file identifier |
---|
| 661 | obj_info - the text information to be written |
---|
| 662 | ******************************************************************************/ |
---|
| 663 | |
---|
| 664 | void ply_put_obj_info(PlyFile *plyfile, char *obj_info) |
---|
| 665 | { |
---|
| 666 | /* (re)allocate space for new info */ |
---|
| 667 | if (plyfile->num_obj_info == 0) |
---|
| 668 | plyfile->obj_info = (char **) myalloc (sizeof (char *)); |
---|
| 669 | else |
---|
| 670 | plyfile->obj_info = (char **) realloc (plyfile->obj_info, |
---|
| 671 | sizeof (char *) * (plyfile->num_obj_info + 1)); |
---|
| 672 | |
---|
| 673 | /* add info to list */ |
---|
| 674 | plyfile->obj_info[plyfile->num_obj_info] = strdup (obj_info); |
---|
| 675 | plyfile->num_obj_info++; |
---|
| 676 | } |
---|
| 677 | |
---|
| 678 | |
---|
| 679 | |
---|
| 680 | |
---|
| 681 | |
---|
| 682 | |
---|
| 683 | |
---|
| 684 | /*************/ |
---|
| 685 | /* Reading */ |
---|
| 686 | /*************/ |
---|
| 687 | |
---|
| 688 | |
---|
| 689 | |
---|
| 690 | /****************************************************************************** |
---|
| 691 | Given a file pointer, get ready to read PLY data from the file. |
---|
| 692 | |
---|
| 693 | Entry: |
---|
| 694 | fp - the given file pointer |
---|
| 695 | |
---|
| 696 | Exit: |
---|
| 697 | nelems - number of elements in object |
---|
| 698 | elem_names - list of element names |
---|
| 699 | returns a pointer to a PlyFile, used to refer to this file, or NULL if error |
---|
| 700 | ******************************************************************************/ |
---|
| 701 | |
---|
| 702 | PlyFile *ply_read(FILE *fp, int *nelems, char ***elem_names) |
---|
| 703 | { |
---|
| 704 | int i,j; |
---|
| 705 | PlyFile *plyfile; |
---|
| 706 | int nwords; |
---|
| 707 | char **words; |
---|
| 708 | int found_format = 0; |
---|
| 709 | char **elist; |
---|
| 710 | PlyElement *elem; |
---|
| 711 | char *orig_line; |
---|
| 712 | |
---|
| 713 | /* check for NULL file pointer */ |
---|
| 714 | if (fp == NULL) |
---|
| 715 | return (NULL); |
---|
| 716 | |
---|
| 717 | #ifdef WIN32 |
---|
| 718 | /* Make sure file is in ASCII mode, at least for the header */ |
---|
| 719 | setmode(fileno(fp), _O_TEXT); |
---|
| 720 | #endif |
---|
| 721 | |
---|
| 722 | /* create record for this object */ |
---|
| 723 | |
---|
| 724 | plyfile = (PlyFile *) myalloc (sizeof (PlyFile)); |
---|
| 725 | plyfile->nelems = 0; |
---|
| 726 | plyfile->comments = NULL; |
---|
| 727 | plyfile->num_comments = 0; |
---|
| 728 | plyfile->obj_info = NULL; |
---|
| 729 | plyfile->num_obj_info = 0; |
---|
| 730 | plyfile->fp = fp; |
---|
| 731 | plyfile->other_elems = NULL; |
---|
| 732 | |
---|
| 733 | /* read and parse the file's header */ |
---|
| 734 | |
---|
| 735 | words = get_words (plyfile->fp, &nwords, &orig_line); |
---|
| 736 | if (!words || !equal_strings (words[0], "ply")) |
---|
| 737 | return (NULL); |
---|
| 738 | |
---|
| 739 | while (words) { |
---|
| 740 | |
---|
| 741 | /* parse words */ |
---|
| 742 | |
---|
| 743 | if (equal_strings (words[0], "format")) { |
---|
| 744 | if (nwords != 3) |
---|
| 745 | return (NULL); |
---|
| 746 | if (equal_strings (words[1], "ascii")) |
---|
| 747 | plyfile->file_type = PLY_ASCII; |
---|
| 748 | else if (equal_strings (words[1], "binary_big_endian")) |
---|
| 749 | plyfile->file_type = PLY_BINARY_BE; |
---|
| 750 | else if (equal_strings (words[1], "binary_little_endian")) |
---|
| 751 | plyfile->file_type = PLY_BINARY_LE; |
---|
| 752 | else |
---|
| 753 | return (NULL); |
---|
| 754 | plyfile->version = atof (words[2]); |
---|
| 755 | found_format = 1; |
---|
| 756 | } |
---|
| 757 | else if (equal_strings (words[0], "element")) |
---|
| 758 | add_element (plyfile, words, nwords); |
---|
| 759 | else if (equal_strings (words[0], "property")) |
---|
| 760 | add_property (plyfile, words, nwords); |
---|
| 761 | else if (equal_strings (words[0], "comment")) |
---|
| 762 | add_comment (plyfile, orig_line); |
---|
| 763 | else if (equal_strings (words[0], "obj_info")) |
---|
| 764 | add_obj_info (plyfile, orig_line); |
---|
| 765 | else if (equal_strings (words[0], "end_header")) |
---|
| 766 | break; |
---|
| 767 | |
---|
| 768 | /* free up words space */ |
---|
| 769 | free (words); |
---|
| 770 | |
---|
| 771 | words = get_words (plyfile->fp, &nwords, &orig_line); |
---|
| 772 | } |
---|
| 773 | |
---|
| 774 | #ifdef WIN32 |
---|
| 775 | /* Make sure file has the correct (ascii/binary) mode */ |
---|
| 776 | if (plyfile->file_type == PLY_ASCII) |
---|
| 777 | setmode(fileno(fp), _O_TEXT); |
---|
| 778 | else |
---|
| 779 | setmode(fileno(fp), _O_BINARY); |
---|
| 780 | #endif |
---|
| 781 | |
---|
| 782 | |
---|
| 783 | /* create tags for each property of each element, to be used */ |
---|
| 784 | /* later to say whether or not to store each property for the user */ |
---|
| 785 | |
---|
| 786 | for (i = 0; i < plyfile->nelems; i++) { |
---|
| 787 | elem = plyfile->elems[i]; |
---|
| 788 | elem->store_prop = (char *) myalloc (sizeof (char) * elem->nprops); |
---|
| 789 | for (j = 0; j < elem->nprops; j++) |
---|
| 790 | elem->store_prop[j] = DONT_STORE_PROP; |
---|
| 791 | elem->other_offset = NO_OTHER_PROPS; /* no "other" props by default */ |
---|
| 792 | } |
---|
| 793 | |
---|
| 794 | /* set return values about the elements */ |
---|
| 795 | |
---|
| 796 | elist = (char **) myalloc (sizeof (char *) * plyfile->nelems); |
---|
| 797 | for (i = 0; i < plyfile->nelems; i++) |
---|
| 798 | elist[i] = strdup (plyfile->elems[i]->name); |
---|
| 799 | |
---|
| 800 | *elem_names = elist; |
---|
| 801 | *nelems = plyfile->nelems; |
---|
| 802 | |
---|
| 803 | /* return a pointer to the file's information */ |
---|
| 804 | |
---|
| 805 | return (plyfile); |
---|
| 806 | } |
---|
| 807 | |
---|
| 808 | |
---|
| 809 | /****************************************************************************** |
---|
| 810 | Open a polygon file for reading. |
---|
| 811 | |
---|
| 812 | Entry: |
---|
| 813 | filename - name of file to read from |
---|
| 814 | |
---|
| 815 | Exit: |
---|
| 816 | nelems - number of elements in object |
---|
| 817 | elem_names - list of element names |
---|
| 818 | file_type - file type, either ascii or binary |
---|
| 819 | version - version number of PLY file |
---|
| 820 | returns a file identifier, used to refer to this file, or NULL if error |
---|
| 821 | ******************************************************************************/ |
---|
| 822 | |
---|
| 823 | PlyFile *ply_open_for_reading( |
---|
| 824 | const char *filename, |
---|
| 825 | int *nelems, |
---|
| 826 | char ***elem_names, |
---|
| 827 | int *file_type, |
---|
| 828 | float *version |
---|
| 829 | ) |
---|
| 830 | { |
---|
| 831 | FILE *fp; |
---|
| 832 | PlyFile *plyfile; |
---|
| 833 | char *name; |
---|
| 834 | |
---|
| 835 | /* tack on the extension .ply, if necessary */ |
---|
| 836 | |
---|
| 837 | name = (char *) myalloc (sizeof (char) * (strlen (filename) + 5)); |
---|
| 838 | strcpy (name, filename); |
---|
| 839 | if (strlen (name) < 4 || |
---|
| 840 | strcmp (name + strlen (name) - 4, ".ply") != 0) |
---|
| 841 | strcat (name, ".ply"); |
---|
| 842 | |
---|
| 843 | /* open the file for reading */ |
---|
| 844 | |
---|
| 845 | fp = fopen (name, "r"); |
---|
| 846 | if (fp == NULL) |
---|
| 847 | return (NULL); |
---|
| 848 | |
---|
| 849 | /* create the PlyFile data structure */ |
---|
| 850 | |
---|
| 851 | plyfile = ply_read (fp, nelems, elem_names); |
---|
| 852 | |
---|
| 853 | /* determine the file type and version */ |
---|
| 854 | |
---|
| 855 | *file_type = plyfile->file_type; |
---|
| 856 | *version = plyfile->version; |
---|
| 857 | |
---|
| 858 | /* return a pointer to the file's information */ |
---|
| 859 | |
---|
| 860 | return (plyfile); |
---|
| 861 | } |
---|
| 862 | |
---|
| 863 | |
---|
| 864 | /****************************************************************************** |
---|
| 865 | Get information about a particular element. |
---|
| 866 | |
---|
| 867 | Entry: |
---|
| 868 | plyfile - file identifier |
---|
| 869 | elem_name - name of element to get information about |
---|
| 870 | |
---|
| 871 | Exit: |
---|
| 872 | nelems - number of elements of this type in the file |
---|
| 873 | nprops - number of properties |
---|
| 874 | returns a list of properties, or NULL if the file doesn't contain that elem |
---|
| 875 | ******************************************************************************/ |
---|
| 876 | |
---|
| 877 | PlyProperty **ply_get_element_description( |
---|
| 878 | PlyFile *plyfile, |
---|
| 879 | char *elem_name, |
---|
| 880 | int *nelems, |
---|
| 881 | int *nprops |
---|
| 882 | ) |
---|
| 883 | { |
---|
| 884 | int i; |
---|
| 885 | PlyElement *elem; |
---|
| 886 | PlyProperty *prop; |
---|
| 887 | PlyProperty **prop_list; |
---|
| 888 | |
---|
| 889 | /* find information about the element */ |
---|
| 890 | elem = find_element (plyfile, elem_name); |
---|
| 891 | if (elem == NULL) |
---|
| 892 | return (NULL); |
---|
| 893 | |
---|
| 894 | *nelems = elem->num; |
---|
| 895 | *nprops = elem->nprops; |
---|
| 896 | |
---|
| 897 | /* make a copy of the element's property list */ |
---|
| 898 | prop_list = (PlyProperty **) myalloc (sizeof (PlyProperty *) * elem->nprops); |
---|
| 899 | for (i = 0; i < elem->nprops; i++) { |
---|
| 900 | prop = (PlyProperty *) myalloc (sizeof (PlyProperty)); |
---|
| 901 | copy_property (prop, elem->props[i]); |
---|
| 902 | prop_list[i] = prop; |
---|
| 903 | } |
---|
| 904 | |
---|
| 905 | /* return this duplicate property list */ |
---|
| 906 | return (prop_list); |
---|
| 907 | } |
---|
| 908 | |
---|
| 909 | |
---|
| 910 | /****************************************************************************** |
---|
| 911 | Specify which properties of an element are to be returned. This should be |
---|
| 912 | called before a call to the routine ply_get_element(). |
---|
| 913 | |
---|
| 914 | Entry: |
---|
| 915 | plyfile - file identifier |
---|
| 916 | elem_name - which element we're talking about |
---|
| 917 | nprops - number of properties |
---|
| 918 | prop_list - list of properties |
---|
| 919 | ******************************************************************************/ |
---|
| 920 | |
---|
| 921 | void ply_get_element_setup( |
---|
| 922 | PlyFile *plyfile, |
---|
| 923 | char *elem_name, |
---|
| 924 | int nprops, |
---|
| 925 | PlyProperty *prop_list |
---|
| 926 | ) |
---|
| 927 | { |
---|
| 928 | int i; |
---|
| 929 | PlyElement *elem; |
---|
| 930 | PlyProperty *prop; |
---|
| 931 | int index; |
---|
| 932 | |
---|
| 933 | /* find information about the element */ |
---|
| 934 | elem = find_element (plyfile, elem_name); |
---|
| 935 | plyfile->which_elem = elem; |
---|
| 936 | |
---|
| 937 | /* deposit the property information into the element's description */ |
---|
| 938 | for (i = 0; i < nprops; i++) { |
---|
| 939 | |
---|
| 940 | /* look for actual property */ |
---|
| 941 | prop = find_property (elem, prop_list[i].name, &index); |
---|
| 942 | if (prop == NULL) { |
---|
| 943 | fprintf (stderr, "Warning: Can't find property '%s' in element '%s'\n", |
---|
| 944 | prop_list[i].name, elem_name); |
---|
| 945 | continue; |
---|
| 946 | } |
---|
| 947 | |
---|
| 948 | /* store its description */ |
---|
| 949 | prop->internal_type = prop_list[i].internal_type; |
---|
| 950 | prop->offset = prop_list[i].offset; |
---|
| 951 | prop->count_internal = prop_list[i].count_internal; |
---|
| 952 | prop->count_offset = prop_list[i].count_offset; |
---|
| 953 | |
---|
| 954 | /* specify that the user wants this property */ |
---|
| 955 | elem->store_prop[index] = STORE_PROP; |
---|
| 956 | } |
---|
| 957 | } |
---|
| 958 | |
---|
| 959 | |
---|
| 960 | /****************************************************************************** |
---|
| 961 | Specify a property of an element that is to be returned. This should be |
---|
| 962 | called (usually multiple times) before a call to the routine ply_get_element(). |
---|
| 963 | This routine should be used in preference to the less flexible old routine |
---|
| 964 | called ply_get_element_setup(). |
---|
| 965 | |
---|
| 966 | Entry: |
---|
| 967 | plyfile - file identifier |
---|
| 968 | elem_name - which element we're talking about |
---|
| 969 | prop - property to add to those that will be returned |
---|
| 970 | ******************************************************************************/ |
---|
| 971 | |
---|
| 972 | void ply_get_property( |
---|
| 973 | PlyFile *plyfile, |
---|
| 974 | char *elem_name, |
---|
| 975 | PlyProperty *prop |
---|
| 976 | ) |
---|
| 977 | { |
---|
| 978 | PlyElement *elem; |
---|
| 979 | PlyProperty *prop_ptr; |
---|
| 980 | int index; |
---|
| 981 | |
---|
| 982 | /* find information about the element */ |
---|
| 983 | elem = find_element (plyfile, elem_name); |
---|
| 984 | plyfile->which_elem = elem; |
---|
| 985 | |
---|
| 986 | /* deposit the property information into the element's description */ |
---|
| 987 | |
---|
| 988 | prop_ptr = find_property (elem, prop->name, &index); |
---|
| 989 | if (prop_ptr == NULL) { |
---|
| 990 | fprintf (stderr, "Warning: Can't find property '%s' in element '%s'\n", |
---|
| 991 | prop->name, elem_name); |
---|
| 992 | return; |
---|
| 993 | } |
---|
| 994 | prop_ptr->internal_type = prop->internal_type; |
---|
| 995 | prop_ptr->offset = prop->offset; |
---|
| 996 | prop_ptr->count_internal = prop->count_internal; |
---|
| 997 | prop_ptr->count_offset = prop->count_offset; |
---|
| 998 | |
---|
| 999 | /* specify that the user wants this property */ |
---|
| 1000 | elem->store_prop[index] = STORE_PROP; |
---|
| 1001 | } |
---|
| 1002 | |
---|
| 1003 | |
---|
| 1004 | /****************************************************************************** |
---|
| 1005 | Read one element from the file. This routine assumes that we're reading |
---|
| 1006 | the type of element specified in the last call to the routine |
---|
| 1007 | ply_get_element_setup(). |
---|
| 1008 | |
---|
| 1009 | Entry: |
---|
| 1010 | plyfile - file identifier |
---|
| 1011 | elem_ptr - pointer to location where the element information should be put |
---|
| 1012 | ******************************************************************************/ |
---|
| 1013 | |
---|
| 1014 | void |
---|
| 1015 | ply_get_element(PlyFile *plyfile, void *elem_ptr) |
---|
| 1016 | { |
---|
| 1017 | if (plyfile->file_type == PLY_ASCII) |
---|
| 1018 | ascii_get_element (plyfile, (char *) elem_ptr, 0); |
---|
| 1019 | else |
---|
| 1020 | binary_get_element (plyfile, (char *) elem_ptr, 0); |
---|
| 1021 | } |
---|
| 1022 | |
---|
| 1023 | |
---|
| 1024 | void |
---|
| 1025 | ply_get_element_noalloc(PlyFile *plyfile, void *elem_ptr) |
---|
| 1026 | { |
---|
| 1027 | if (plyfile->file_type == PLY_ASCII) |
---|
| 1028 | ascii_get_element (plyfile, (char *) elem_ptr, 1); |
---|
| 1029 | else |
---|
| 1030 | binary_get_element (plyfile, (char *) elem_ptr, 1); |
---|
| 1031 | } |
---|
| 1032 | |
---|
| 1033 | |
---|
| 1034 | /****************************************************************************** |
---|
| 1035 | Extract the comments from the header information of a PLY file. |
---|
| 1036 | |
---|
| 1037 | Entry: |
---|
| 1038 | plyfile - file identifier |
---|
| 1039 | |
---|
| 1040 | Exit: |
---|
| 1041 | num_comments - number of comments returned |
---|
| 1042 | returns a pointer to a list of comments |
---|
| 1043 | ******************************************************************************/ |
---|
| 1044 | |
---|
| 1045 | char **ply_get_comments(PlyFile *plyfile, int *num_comments) |
---|
| 1046 | { |
---|
| 1047 | *num_comments = plyfile->num_comments; |
---|
| 1048 | return (plyfile->comments); |
---|
| 1049 | } |
---|
| 1050 | |
---|
| 1051 | |
---|
| 1052 | /****************************************************************************** |
---|
| 1053 | Extract the object information (arbitrary text) from the header information |
---|
| 1054 | of a PLY file. |
---|
| 1055 | |
---|
| 1056 | Entry: |
---|
| 1057 | plyfile - file identifier |
---|
| 1058 | |
---|
| 1059 | Exit: |
---|
| 1060 | num_obj_info - number of lines of text information returned |
---|
| 1061 | returns a pointer to a list of object info lines |
---|
| 1062 | ******************************************************************************/ |
---|
| 1063 | |
---|
| 1064 | char **ply_get_obj_info(PlyFile *plyfile, int *num_obj_info) |
---|
| 1065 | { |
---|
| 1066 | *num_obj_info = plyfile->num_obj_info; |
---|
| 1067 | return (plyfile->obj_info); |
---|
| 1068 | } |
---|
| 1069 | |
---|
| 1070 | |
---|
| 1071 | /****************************************************************************** |
---|
| 1072 | Make ready for "other" properties of an element-- those properties that |
---|
| 1073 | the user has not explicitly asked for, but that are to be stashed away |
---|
| 1074 | in a special structure to be carried along with the element's other |
---|
| 1075 | information. |
---|
| 1076 | |
---|
| 1077 | Entry: |
---|
| 1078 | plyfile - file identifier |
---|
| 1079 | elem - element for which we want to save away other properties |
---|
| 1080 | ******************************************************************************/ |
---|
| 1081 | |
---|
| 1082 | void setup_other_props(PlyFile *plyfile, PlyElement *elem) |
---|
| 1083 | { |
---|
| 1084 | int i; |
---|
| 1085 | PlyProperty *prop; |
---|
| 1086 | int size = 0; |
---|
| 1087 | int type_size; |
---|
| 1088 | |
---|
| 1089 | /* Examine each property in decreasing order of size. */ |
---|
| 1090 | /* We do this so that all data types will be aligned by */ |
---|
| 1091 | /* word, half-word, or whatever within the structure. */ |
---|
| 1092 | |
---|
| 1093 | for (type_size = 8; type_size > 0; type_size /= 2) { |
---|
| 1094 | |
---|
| 1095 | /* add up the space taken by each property, and save this information */ |
---|
| 1096 | /* away in the property descriptor */ |
---|
| 1097 | |
---|
| 1098 | for (i = 0; i < elem->nprops; i++) { |
---|
| 1099 | |
---|
| 1100 | /* don't bother with properties we've been asked to store explicitly */ |
---|
| 1101 | if (elem->store_prop[i]) |
---|
| 1102 | continue; |
---|
| 1103 | |
---|
| 1104 | prop = elem->props[i]; |
---|
| 1105 | |
---|
| 1106 | /* internal types will be same as external */ |
---|
| 1107 | prop->internal_type = prop->external_type; |
---|
| 1108 | prop->count_internal = prop->count_external; |
---|
| 1109 | |
---|
| 1110 | /* check list case */ |
---|
| 1111 | if (prop->is_list) { |
---|
| 1112 | |
---|
| 1113 | /* pointer to list */ |
---|
| 1114 | if (type_size == sizeof (void *)) { |
---|
| 1115 | prop->offset = size; |
---|
| 1116 | size += sizeof (void *); /* always use size of a pointer here */ |
---|
| 1117 | } |
---|
| 1118 | |
---|
| 1119 | /* count of number of list elements */ |
---|
| 1120 | if (type_size == ply_type_size[prop->count_external]) { |
---|
| 1121 | prop->count_offset = size; |
---|
| 1122 | size += ply_type_size[prop->count_external]; |
---|
| 1123 | } |
---|
| 1124 | } |
---|
| 1125 | /* not list */ |
---|
| 1126 | else if (type_size == ply_type_size[prop->external_type]) { |
---|
| 1127 | prop->offset = size; |
---|
| 1128 | size += ply_type_size[prop->external_type]; |
---|
| 1129 | } |
---|
| 1130 | } |
---|
| 1131 | |
---|
| 1132 | } |
---|
| 1133 | |
---|
| 1134 | /* save the size for the other_props structure */ |
---|
| 1135 | elem->other_size = size; |
---|
| 1136 | } |
---|
| 1137 | |
---|
| 1138 | |
---|
| 1139 | /****************************************************************************** |
---|
| 1140 | Specify that we want the "other" properties of an element to be tucked |
---|
| 1141 | away within the user's structure. The user needn't be concerned for how |
---|
| 1142 | these properties are stored. |
---|
| 1143 | |
---|
| 1144 | Entry: |
---|
| 1145 | plyfile - file identifier |
---|
| 1146 | elem_name - name of element that we want to store other_props in |
---|
| 1147 | offset - offset to where other_props will be stored inside user's structure |
---|
| 1148 | |
---|
| 1149 | Exit: |
---|
| 1150 | returns pointer to structure containing description of other_props |
---|
| 1151 | ******************************************************************************/ |
---|
| 1152 | |
---|
| 1153 | PlyOtherProp *ply_get_other_properties( |
---|
| 1154 | PlyFile *plyfile, |
---|
| 1155 | char *elem_name, |
---|
| 1156 | int offset |
---|
| 1157 | ) |
---|
| 1158 | { |
---|
| 1159 | int i; |
---|
| 1160 | PlyElement *elem; |
---|
| 1161 | PlyOtherProp *other; |
---|
| 1162 | PlyProperty *prop; |
---|
| 1163 | int nprops; |
---|
| 1164 | |
---|
| 1165 | /* find information about the element */ |
---|
| 1166 | elem = find_element (plyfile, elem_name); |
---|
| 1167 | if (elem == NULL) { |
---|
| 1168 | fprintf (stderr, "ply_get_other_properties: Can't find element '%s'\n", |
---|
| 1169 | elem_name); |
---|
| 1170 | return (NULL); |
---|
| 1171 | } |
---|
| 1172 | |
---|
| 1173 | /* remember that this is the "current" element */ |
---|
| 1174 | plyfile->which_elem = elem; |
---|
| 1175 | |
---|
| 1176 | /* save the offset to where to store the other_props */ |
---|
| 1177 | elem->other_offset = offset; |
---|
| 1178 | |
---|
| 1179 | /* place the appropriate pointers, etc. in the element's property list */ |
---|
| 1180 | setup_other_props (plyfile, elem); |
---|
| 1181 | |
---|
| 1182 | /* create structure for describing other_props */ |
---|
| 1183 | other = (PlyOtherProp *) myalloc (sizeof (PlyOtherProp)); |
---|
| 1184 | other->name = strdup (elem_name); |
---|
| 1185 | #if 0 |
---|
| 1186 | if (elem->other_offset == NO_OTHER_PROPS) { |
---|
| 1187 | other->size = 0; |
---|
| 1188 | other->props = NULL; |
---|
| 1189 | other->nprops = 0; |
---|
| 1190 | return (other); |
---|
| 1191 | } |
---|
| 1192 | #endif |
---|
| 1193 | other->size = elem->other_size; |
---|
| 1194 | other->props = (PlyProperty **) myalloc (sizeof(PlyProperty) * elem->nprops); |
---|
| 1195 | |
---|
| 1196 | /* save descriptions of each "other" property */ |
---|
| 1197 | nprops = 0; |
---|
| 1198 | for (i = 0; i < elem->nprops; i++) { |
---|
| 1199 | if (elem->store_prop[i]) |
---|
| 1200 | continue; |
---|
| 1201 | prop = (PlyProperty *) myalloc (sizeof (PlyProperty)); |
---|
| 1202 | copy_property (prop, elem->props[i]); |
---|
| 1203 | other->props[nprops] = prop; |
---|
| 1204 | nprops++; |
---|
| 1205 | } |
---|
| 1206 | other->nprops = nprops; |
---|
| 1207 | |
---|
| 1208 | #if 1 |
---|
| 1209 | /* set other_offset pointer appropriately if there are NO other properties */ |
---|
| 1210 | if (other->nprops == 0) { |
---|
| 1211 | elem->other_offset = NO_OTHER_PROPS; |
---|
| 1212 | } |
---|
| 1213 | #endif |
---|
| 1214 | |
---|
| 1215 | /* return structure */ |
---|
| 1216 | return (other); |
---|
| 1217 | } |
---|
| 1218 | |
---|
| 1219 | |
---|
| 1220 | |
---|
| 1221 | |
---|
| 1222 | /*************************/ |
---|
| 1223 | /* Other Element Stuff */ |
---|
| 1224 | /*************************/ |
---|
| 1225 | |
---|
| 1226 | |
---|
| 1227 | |
---|
| 1228 | |
---|
| 1229 | /****************************************************************************** |
---|
| 1230 | Grab all the data for an element that a user does not want to explicitly |
---|
| 1231 | read in. |
---|
| 1232 | |
---|
| 1233 | Entry: |
---|
| 1234 | plyfile - pointer to file |
---|
| 1235 | elem_name - name of element whose data is to be read in |
---|
| 1236 | elem_count - number of instances of this element stored in the file |
---|
| 1237 | |
---|
| 1238 | Exit: |
---|
| 1239 | returns pointer to ALL the "other" element data for this PLY file |
---|
| 1240 | ******************************************************************************/ |
---|
| 1241 | |
---|
| 1242 | PlyOtherElems *ply_get_other_element ( |
---|
| 1243 | PlyFile *plyfile, |
---|
| 1244 | char *elem_name, |
---|
| 1245 | int elem_count |
---|
| 1246 | ) |
---|
| 1247 | { |
---|
| 1248 | int i; |
---|
| 1249 | PlyElement *elem; |
---|
| 1250 | PlyOtherElems *other_elems; |
---|
| 1251 | OtherElem *other; |
---|
| 1252 | int num_elems; |
---|
| 1253 | |
---|
| 1254 | /* look for appropriate element */ |
---|
| 1255 | elem = find_element (plyfile, elem_name); |
---|
| 1256 | if (elem == NULL) { |
---|
| 1257 | fprintf (stderr, |
---|
| 1258 | "ply_get_other_element: can't find element '%s'\n", elem_name); |
---|
| 1259 | exit (-1); |
---|
| 1260 | } |
---|
| 1261 | |
---|
| 1262 | /* create room for the new "other" element, initializing the */ |
---|
| 1263 | /* other data structure if necessary */ |
---|
| 1264 | |
---|
| 1265 | if (plyfile->other_elems == NULL) { |
---|
| 1266 | plyfile->other_elems = (PlyOtherElems *) myalloc (sizeof (PlyOtherElems)); |
---|
| 1267 | other_elems = plyfile->other_elems; |
---|
| 1268 | other_elems->other_list = (OtherElem *) myalloc (sizeof (OtherElem)); |
---|
| 1269 | other = &(other_elems->other_list[0]); |
---|
| 1270 | other_elems->num_elems = 1; |
---|
| 1271 | } |
---|
| 1272 | else { |
---|
| 1273 | other_elems = plyfile->other_elems; |
---|
| 1274 | other_elems->other_list = (OtherElem *) realloc (other_elems->other_list, |
---|
| 1275 | sizeof (OtherElem) * other_elems->num_elems + 1); |
---|
| 1276 | other = &(other_elems->other_list[other_elems->num_elems]); |
---|
| 1277 | other_elems->num_elems++; |
---|
| 1278 | } |
---|
| 1279 | |
---|
| 1280 | /* count of element instances in file */ |
---|
| 1281 | other->elem_count = elem_count; |
---|
| 1282 | |
---|
| 1283 | /* save name of element */ |
---|
| 1284 | other->elem_name = strdup (elem_name); |
---|
| 1285 | |
---|
| 1286 | /* create a list to hold all the current elements */ |
---|
| 1287 | other->other_data = (OtherData **) |
---|
| 1288 | malloc (sizeof (OtherData *) * other->elem_count); |
---|
| 1289 | |
---|
| 1290 | /* set up for getting elements */ |
---|
| 1291 | other->other_props = ply_get_other_properties (plyfile, elem_name, |
---|
| 1292 | offsetof(OtherData,other_props)); |
---|
| 1293 | |
---|
| 1294 | /* grab all these elements */ |
---|
| 1295 | for (i = 0; i < other->elem_count; i++) { |
---|
| 1296 | /* grab and element from the file */ |
---|
| 1297 | other->other_data[i] = (OtherData *) malloc (sizeof (OtherData)); |
---|
| 1298 | ply_get_element (plyfile, (void *) other->other_data[i]); |
---|
| 1299 | } |
---|
| 1300 | |
---|
| 1301 | /* return pointer to the other elements data */ |
---|
| 1302 | return (other_elems); |
---|
| 1303 | } |
---|
| 1304 | |
---|
| 1305 | |
---|
| 1306 | /****************************************************************************** |
---|
| 1307 | Pass along a pointer to "other" elements that we want to save in a given |
---|
| 1308 | PLY file. These other elements were presumably read from another PLY file. |
---|
| 1309 | |
---|
| 1310 | Entry: |
---|
| 1311 | plyfile - file pointer in which to store this other element info |
---|
| 1312 | other_elems - info about other elements that we want to store |
---|
| 1313 | ******************************************************************************/ |
---|
| 1314 | |
---|
| 1315 | void ply_describe_other_elements ( |
---|
| 1316 | PlyFile *plyfile, |
---|
| 1317 | PlyOtherElems *other_elems |
---|
| 1318 | ) |
---|
| 1319 | { |
---|
| 1320 | int i; |
---|
| 1321 | OtherElem *other; |
---|
| 1322 | |
---|
| 1323 | /* ignore this call if there is no other element */ |
---|
| 1324 | if (other_elems == NULL) |
---|
| 1325 | return; |
---|
| 1326 | |
---|
| 1327 | /* save pointer to this information */ |
---|
| 1328 | plyfile->other_elems = other_elems; |
---|
| 1329 | |
---|
| 1330 | /* describe the other properties of this element */ |
---|
| 1331 | |
---|
| 1332 | for (i = 0; i < other_elems->num_elems; i++) { |
---|
| 1333 | other = &(other_elems->other_list[i]); |
---|
| 1334 | ply_element_count (plyfile, other->elem_name, other->elem_count); |
---|
| 1335 | ply_describe_other_properties (plyfile, other->other_props, |
---|
| 1336 | offsetof(OtherData,other_props)); |
---|
| 1337 | } |
---|
| 1338 | } |
---|
| 1339 | |
---|
| 1340 | |
---|
| 1341 | /****************************************************************************** |
---|
| 1342 | Write out the "other" elements specified for this PLY file. |
---|
| 1343 | |
---|
| 1344 | Entry: |
---|
| 1345 | plyfile - pointer to PLY file to write out other elements for |
---|
| 1346 | ******************************************************************************/ |
---|
| 1347 | |
---|
| 1348 | void ply_put_other_elements (PlyFile *plyfile) |
---|
| 1349 | { |
---|
| 1350 | int i,j; |
---|
| 1351 | OtherElem *other; |
---|
| 1352 | |
---|
| 1353 | /* make sure we have other elements to write */ |
---|
| 1354 | if (plyfile->other_elems == NULL) |
---|
| 1355 | return; |
---|
| 1356 | |
---|
| 1357 | /* write out the data for each "other" element */ |
---|
| 1358 | |
---|
| 1359 | for (i = 0; i < plyfile->other_elems->num_elems; i++) { |
---|
| 1360 | |
---|
| 1361 | other = &(plyfile->other_elems->other_list[i]); |
---|
| 1362 | ply_put_element_setup (plyfile, other->elem_name); |
---|
| 1363 | |
---|
| 1364 | /* write out each instance of the current element */ |
---|
| 1365 | for (j = 0; j < other->elem_count; j++) |
---|
| 1366 | ply_put_element (plyfile, (void *) other->other_data[j]); |
---|
| 1367 | } |
---|
| 1368 | } |
---|
| 1369 | |
---|
| 1370 | |
---|
| 1371 | /****************************************************************************** |
---|
| 1372 | Free up storage used by an "other" elements data structure. |
---|
| 1373 | |
---|
| 1374 | Entry: |
---|
| 1375 | other_elems - data structure to free up |
---|
| 1376 | ******************************************************************************/ |
---|
| 1377 | |
---|
| 1378 | void ply_free_other_elements (PlyOtherElems *other_elems) |
---|
| 1379 | { |
---|
| 1380 | |
---|
| 1381 | } |
---|
| 1382 | |
---|
| 1383 | |
---|
| 1384 | |
---|
| 1385 | /*******************/ |
---|
| 1386 | /* Miscellaneous */ |
---|
| 1387 | /*******************/ |
---|
| 1388 | |
---|
| 1389 | |
---|
| 1390 | |
---|
| 1391 | /****************************************************************************** |
---|
| 1392 | Close a PLY file. |
---|
| 1393 | |
---|
| 1394 | Entry: |
---|
| 1395 | plyfile - identifier of file to close |
---|
| 1396 | ******************************************************************************/ |
---|
| 1397 | |
---|
| 1398 | void ply_close(PlyFile *plyfile) |
---|
| 1399 | { |
---|
| 1400 | fclose (plyfile->fp); |
---|
| 1401 | |
---|
| 1402 | /* free up memory associated with the PLY file */ |
---|
| 1403 | free (plyfile); |
---|
| 1404 | } |
---|
| 1405 | |
---|
| 1406 | |
---|
| 1407 | /****************************************************************************** |
---|
| 1408 | Get version number and file type of a PlyFile. |
---|
| 1409 | |
---|
| 1410 | Entry: |
---|
| 1411 | ply - pointer to PLY file |
---|
| 1412 | |
---|
| 1413 | Exit: |
---|
| 1414 | version - version of the file |
---|
| 1415 | file_type - PLY_ASCII, PLY_BINARY_BE, or PLY_BINARY_LE |
---|
| 1416 | ******************************************************************************/ |
---|
| 1417 | |
---|
| 1418 | void ply_get_info(PlyFile *ply, float *version, int *file_type) |
---|
| 1419 | { |
---|
| 1420 | if (ply == NULL) |
---|
| 1421 | return; |
---|
| 1422 | |
---|
| 1423 | *version = ply->version; |
---|
| 1424 | *file_type = ply->file_type; |
---|
| 1425 | } |
---|
| 1426 | |
---|
| 1427 | |
---|
| 1428 | /****************************************************************************** |
---|
| 1429 | Compare two strings. Returns 1 if they are the same, 0 if not. |
---|
| 1430 | ******************************************************************************/ |
---|
| 1431 | |
---|
| 1432 | int equal_strings(char *s1, char *s2) |
---|
| 1433 | { |
---|
| 1434 | int i; |
---|
| 1435 | |
---|
| 1436 | while (*s1 && *s2) |
---|
| 1437 | if (*s1++ != *s2++) |
---|
| 1438 | return (0); |
---|
| 1439 | |
---|
| 1440 | if (*s1 != *s2) |
---|
| 1441 | return (0); |
---|
| 1442 | else |
---|
| 1443 | return (1); |
---|
| 1444 | } |
---|
| 1445 | |
---|
| 1446 | |
---|
| 1447 | /****************************************************************************** |
---|
| 1448 | Find an element from the element list of a given PLY object. |
---|
| 1449 | |
---|
| 1450 | Entry: |
---|
| 1451 | plyfile - file id for PLY file |
---|
| 1452 | element - name of element we're looking for |
---|
| 1453 | |
---|
| 1454 | Exit: |
---|
| 1455 | returns the element, or NULL if not found |
---|
| 1456 | ******************************************************************************/ |
---|
| 1457 | |
---|
| 1458 | PlyElement *find_element(PlyFile *plyfile, char *element) |
---|
| 1459 | { |
---|
| 1460 | int i; |
---|
| 1461 | |
---|
| 1462 | for (i = 0; i < plyfile->nelems; i++) |
---|
| 1463 | if (equal_strings (element, plyfile->elems[i]->name)) |
---|
| 1464 | return (plyfile->elems[i]); |
---|
| 1465 | |
---|
| 1466 | return (NULL); |
---|
| 1467 | } |
---|
| 1468 | |
---|
| 1469 | |
---|
| 1470 | /****************************************************************************** |
---|
| 1471 | Find a property in the list of properties of a given element. |
---|
| 1472 | |
---|
| 1473 | Entry: |
---|
| 1474 | elem - pointer to element in which we want to find the property |
---|
| 1475 | prop_name - name of property to find |
---|
| 1476 | |
---|
| 1477 | Exit: |
---|
| 1478 | index - index to position in list |
---|
| 1479 | returns a pointer to the property, or NULL if not found |
---|
| 1480 | ******************************************************************************/ |
---|
| 1481 | |
---|
| 1482 | PlyProperty *find_property(PlyElement *elem, char *prop_name, int *index) |
---|
| 1483 | { |
---|
| 1484 | int i; |
---|
| 1485 | |
---|
| 1486 | for (i = 0; i < elem->nprops; i++) |
---|
| 1487 | if (equal_strings (prop_name, elem->props[i]->name)) { |
---|
| 1488 | *index = i; |
---|
| 1489 | return (elem->props[i]); |
---|
| 1490 | } |
---|
| 1491 | |
---|
| 1492 | *index = -1; |
---|
| 1493 | return (NULL); |
---|
| 1494 | } |
---|
| 1495 | |
---|
| 1496 | |
---|
| 1497 | /****************************************************************************** |
---|
| 1498 | Read an element from an ascii file. |
---|
| 1499 | |
---|
| 1500 | Entry: |
---|
| 1501 | plyfile - file identifier |
---|
| 1502 | elem_ptr - pointer to element |
---|
| 1503 | ******************************************************************************/ |
---|
| 1504 | |
---|
| 1505 | void ascii_get_element(PlyFile *plyfile, char *elem_ptr, |
---|
| 1506 | int use_provided_storage) |
---|
| 1507 | { |
---|
| 1508 | int i,j,k; |
---|
| 1509 | PlyElement *elem; |
---|
| 1510 | PlyProperty *prop; |
---|
| 1511 | char **words; |
---|
| 1512 | int nwords; |
---|
| 1513 | int which_word; |
---|
| 1514 | FILE *fp = plyfile->fp; |
---|
| 1515 | char *elem_data,*item; |
---|
| 1516 | char *item_ptr; |
---|
| 1517 | int item_size; |
---|
| 1518 | int int_val; |
---|
| 1519 | unsigned int uint_val; |
---|
| 1520 | double double_val; |
---|
| 1521 | int list_count; |
---|
| 1522 | int store_it; |
---|
| 1523 | char **store_array; |
---|
| 1524 | char *orig_line; |
---|
| 1525 | char *other_data; |
---|
| 1526 | int other_flag; |
---|
| 1527 | |
---|
| 1528 | /* the kind of element we're reading currently */ |
---|
| 1529 | elem = plyfile->which_elem; |
---|
| 1530 | |
---|
| 1531 | /* do we need to setup for other_props? */ |
---|
| 1532 | |
---|
| 1533 | if (elem->other_offset != NO_OTHER_PROPS) { |
---|
| 1534 | char **ptr; |
---|
| 1535 | other_flag = 1; |
---|
| 1536 | /* make room for other_props */ |
---|
| 1537 | other_data = (char *) myalloc (elem->other_size); |
---|
| 1538 | /* store pointer in user's structure to the other_props */ |
---|
| 1539 | ptr = (char **) (elem_ptr + elem->other_offset); |
---|
| 1540 | *ptr = other_data; |
---|
| 1541 | } |
---|
| 1542 | else |
---|
| 1543 | other_flag = 0; |
---|
| 1544 | |
---|
| 1545 | /* read in the element */ |
---|
| 1546 | |
---|
| 1547 | words = get_words (plyfile->fp, &nwords, &orig_line); |
---|
| 1548 | if (words == NULL) { |
---|
| 1549 | fprintf (stderr, "ply_get_element: unexpected end of file\n"); |
---|
| 1550 | exit (-1); |
---|
| 1551 | } |
---|
| 1552 | |
---|
| 1553 | which_word = 0; |
---|
| 1554 | |
---|
| 1555 | for (j = 0; j < elem->nprops; j++) { |
---|
| 1556 | |
---|
| 1557 | prop = elem->props[j]; |
---|
| 1558 | store_it = (elem->store_prop[j] | other_flag); |
---|
| 1559 | |
---|
| 1560 | /* store either in the user's structure or in other_props */ |
---|
| 1561 | if (elem->store_prop[j]) |
---|
| 1562 | elem_data = elem_ptr; |
---|
| 1563 | else |
---|
| 1564 | elem_data = other_data; |
---|
| 1565 | |
---|
| 1566 | if (prop->is_list) { /* a list */ |
---|
| 1567 | |
---|
| 1568 | /* get and store the number of items in the list */ |
---|
| 1569 | get_ascii_item (words[which_word++], prop->count_external, |
---|
| 1570 | &int_val, &uint_val, &double_val); |
---|
| 1571 | if (store_it) { |
---|
| 1572 | item = elem_data + prop->count_offset; |
---|
| 1573 | store_item(item, prop->count_internal, int_val, uint_val, double_val); |
---|
| 1574 | } |
---|
| 1575 | |
---|
| 1576 | /* allocate space for an array of items and store a ptr to the array */ |
---|
| 1577 | list_count = int_val; |
---|
| 1578 | item_size = ply_type_size[prop->internal_type]; |
---|
| 1579 | store_array = (char **) (elem_data + prop->offset); |
---|
| 1580 | |
---|
| 1581 | if (list_count == 0) { |
---|
| 1582 | if (store_it && !use_provided_storage) |
---|
| 1583 | *store_array = NULL; |
---|
| 1584 | } |
---|
| 1585 | else { |
---|
| 1586 | if (store_it) { |
---|
| 1587 | if (use_provided_storage) { |
---|
| 1588 | item_ptr = *store_array; |
---|
| 1589 | item = item_ptr; |
---|
| 1590 | } else { |
---|
| 1591 | item_ptr = (char *) myalloc |
---|
| 1592 | (sizeof (char) * item_size * list_count); |
---|
| 1593 | item = item_ptr; |
---|
| 1594 | *store_array = item_ptr; |
---|
| 1595 | } |
---|
| 1596 | } |
---|
| 1597 | |
---|
| 1598 | /* read items and store them into the array */ |
---|
| 1599 | for (k = 0; k < list_count; k++) { |
---|
| 1600 | get_ascii_item (words[which_word++], prop->external_type, |
---|
| 1601 | &int_val, &uint_val, &double_val); |
---|
| 1602 | if (store_it) { |
---|
| 1603 | store_item (item, prop->internal_type, |
---|
| 1604 | int_val, uint_val, double_val); |
---|
| 1605 | item += item_size; |
---|
| 1606 | } |
---|
| 1607 | } |
---|
| 1608 | } |
---|
| 1609 | |
---|
| 1610 | } |
---|
| 1611 | else { /* not a list */ |
---|
| 1612 | get_ascii_item (words[which_word++], prop->external_type, |
---|
| 1613 | &int_val, &uint_val, &double_val); |
---|
| 1614 | if (store_it) { |
---|
| 1615 | item = elem_data + prop->offset; |
---|
| 1616 | store_item (item, prop->internal_type, int_val, uint_val, double_val); |
---|
| 1617 | } |
---|
| 1618 | } |
---|
| 1619 | |
---|
| 1620 | } |
---|
| 1621 | |
---|
| 1622 | free (words); |
---|
| 1623 | } |
---|
| 1624 | |
---|
| 1625 | |
---|
| 1626 | /****************************************************************************** |
---|
| 1627 | Read an element from a binary file. |
---|
| 1628 | |
---|
| 1629 | Entry: |
---|
| 1630 | plyfile - file identifier |
---|
| 1631 | elem_ptr - pointer to an element |
---|
| 1632 | ******************************************************************************/ |
---|
| 1633 | |
---|
| 1634 | void binary_get_element(PlyFile *plyfile, char *elem_ptr, |
---|
| 1635 | int use_provided_storage) |
---|
| 1636 | { |
---|
| 1637 | int i,j,k; |
---|
| 1638 | PlyElement *elem; |
---|
| 1639 | PlyProperty *prop; |
---|
| 1640 | FILE *fp = plyfile->fp; |
---|
| 1641 | char *elem_data,*item; |
---|
| 1642 | char *item_ptr; |
---|
| 1643 | int item_size; |
---|
| 1644 | int int_val; |
---|
| 1645 | unsigned int uint_val; |
---|
| 1646 | double double_val; |
---|
| 1647 | int list_count; |
---|
| 1648 | int store_it; |
---|
| 1649 | char **store_array; |
---|
| 1650 | char *other_data; |
---|
| 1651 | int other_flag; |
---|
| 1652 | |
---|
| 1653 | /* the kind of element we're reading currently */ |
---|
| 1654 | elem = plyfile->which_elem; |
---|
| 1655 | |
---|
| 1656 | /* do we need to setup for other_props? */ |
---|
| 1657 | |
---|
| 1658 | if (elem->other_offset != NO_OTHER_PROPS) { |
---|
| 1659 | char **ptr; |
---|
| 1660 | other_flag = 1; |
---|
| 1661 | /* make room for other_props */ |
---|
| 1662 | other_data = (char *) myalloc (elem->other_size); |
---|
| 1663 | /* store pointer in user's structure to the other_props */ |
---|
| 1664 | ptr = (char **) (elem_ptr + elem->other_offset); |
---|
| 1665 | *ptr = other_data; |
---|
| 1666 | } |
---|
| 1667 | else |
---|
| 1668 | other_flag = 0; |
---|
| 1669 | |
---|
| 1670 | /* read in a number of elements */ |
---|
| 1671 | |
---|
| 1672 | for (j = 0; j < elem->nprops; j++) { |
---|
| 1673 | |
---|
| 1674 | prop = elem->props[j]; |
---|
| 1675 | store_it = (elem->store_prop[j] | other_flag); |
---|
| 1676 | |
---|
| 1677 | /* store either in the user's structure or in other_props */ |
---|
| 1678 | if (elem->store_prop[j]) |
---|
| 1679 | elem_data = elem_ptr; |
---|
| 1680 | else |
---|
| 1681 | elem_data = other_data; |
---|
| 1682 | |
---|
| 1683 | if (prop->is_list) { /* a list */ |
---|
| 1684 | |
---|
| 1685 | /* get and store the number of items in the list */ |
---|
| 1686 | get_binary_item (fp, prop->count_external, |
---|
| 1687 | &int_val, &uint_val, &double_val, plyfile->file_type); |
---|
| 1688 | if (store_it) { |
---|
| 1689 | item = elem_data + prop->count_offset; |
---|
| 1690 | store_item(item, prop->count_internal, int_val, uint_val, double_val); |
---|
| 1691 | } |
---|
| 1692 | |
---|
| 1693 | /* allocate space for an array of items and store a ptr to the array */ |
---|
| 1694 | list_count = int_val; |
---|
| 1695 | /* The "if" was added by Afra Zomorodian 8/22/95 |
---|
| 1696 | * so that zipper won't crash reading plies that have additional |
---|
| 1697 | * properties. |
---|
| 1698 | */ |
---|
| 1699 | if (store_it) { |
---|
| 1700 | item_size = ply_type_size[prop->internal_type]; |
---|
| 1701 | } |
---|
| 1702 | store_array = (char **) (elem_data + prop->offset); |
---|
| 1703 | if (list_count == 0) { |
---|
| 1704 | if (store_it && !use_provided_storage) |
---|
| 1705 | *store_array = NULL; |
---|
| 1706 | } |
---|
| 1707 | else { |
---|
| 1708 | if (store_it) { |
---|
| 1709 | if (use_provided_storage) { |
---|
| 1710 | item_ptr = *store_array; |
---|
| 1711 | item = item_ptr; |
---|
| 1712 | } else { |
---|
| 1713 | item_ptr = (char *) myalloc |
---|
| 1714 | (sizeof (char) * item_size * list_count); |
---|
| 1715 | item = item_ptr; |
---|
| 1716 | *store_array = item_ptr; |
---|
| 1717 | } |
---|
| 1718 | } |
---|
| 1719 | |
---|
| 1720 | /* read items and store them into the array */ |
---|
| 1721 | for (k = 0; k < list_count; k++) { |
---|
| 1722 | get_binary_item (fp, prop->external_type, |
---|
| 1723 | &int_val, &uint_val, &double_val, |
---|
| 1724 | plyfile->file_type); |
---|
| 1725 | if (store_it) { |
---|
| 1726 | store_item (item, prop->internal_type, |
---|
| 1727 | int_val, uint_val, double_val); |
---|
| 1728 | item += item_size; |
---|
| 1729 | } |
---|
| 1730 | } |
---|
| 1731 | } |
---|
| 1732 | |
---|
| 1733 | } |
---|
| 1734 | else { /* not a list */ |
---|
| 1735 | get_binary_item (fp, prop->external_type, |
---|
| 1736 | &int_val, &uint_val, &double_val, plyfile->file_type); |
---|
| 1737 | if (store_it) { |
---|
| 1738 | item = elem_data + prop->offset; |
---|
| 1739 | store_item (item, prop->internal_type, int_val, uint_val, double_val); |
---|
| 1740 | } |
---|
| 1741 | } |
---|
| 1742 | |
---|
| 1743 | } |
---|
| 1744 | } |
---|
| 1745 | |
---|
| 1746 | |
---|
| 1747 | /****************************************************************************** |
---|
| 1748 | Write to a file the word that represents a PLY data type. |
---|
| 1749 | |
---|
| 1750 | Entry: |
---|
| 1751 | fp - file pointer |
---|
| 1752 | code - code for type |
---|
| 1753 | ******************************************************************************/ |
---|
| 1754 | |
---|
| 1755 | void write_scalar_type (FILE *fp, int code) |
---|
| 1756 | { |
---|
| 1757 | /* make sure this is a valid code */ |
---|
| 1758 | |
---|
| 1759 | if (code <= PLY_START_TYPE || code >= PLY_END_TYPE) { |
---|
| 1760 | fprintf (stderr, "write_scalar_type: bad data code = %d\n", code); |
---|
| 1761 | exit (-1); |
---|
| 1762 | } |
---|
| 1763 | |
---|
| 1764 | /* write the code to a file */ |
---|
| 1765 | |
---|
| 1766 | fprintf (fp, "%s", type_names[code]); |
---|
| 1767 | } |
---|
| 1768 | |
---|
| 1769 | |
---|
| 1770 | /****************************************************************************** |
---|
| 1771 | Get a text line from a file and break it up into words. |
---|
| 1772 | |
---|
| 1773 | IMPORTANT: The calling routine call "free" on the returned pointer once |
---|
| 1774 | finished with it. |
---|
| 1775 | |
---|
| 1776 | Entry: |
---|
| 1777 | fp - file to read from |
---|
| 1778 | |
---|
| 1779 | Exit: |
---|
| 1780 | nwords - number of words returned |
---|
| 1781 | orig_line - the original line of characters |
---|
| 1782 | returns a list of words from the line, or NULL if end-of-file |
---|
| 1783 | ******************************************************************************/ |
---|
| 1784 | |
---|
| 1785 | char **get_words(FILE *fp, int *nwords, char **orig_line) |
---|
| 1786 | { |
---|
| 1787 | #define BIG_STRING 4096 |
---|
| 1788 | int i,j; |
---|
| 1789 | static char str[BIG_STRING]; |
---|
| 1790 | static char str_copy[BIG_STRING]; |
---|
| 1791 | char **words; |
---|
| 1792 | int max_words = 10; |
---|
| 1793 | int num_words = 0; |
---|
| 1794 | char *ptr,*ptr2; |
---|
| 1795 | char *result; |
---|
| 1796 | |
---|
| 1797 | words = (char **) myalloc (sizeof (char *) * max_words); |
---|
| 1798 | |
---|
| 1799 | /* read in a line */ |
---|
| 1800 | result = fgets (str, BIG_STRING, fp); |
---|
| 1801 | if (result == NULL) { |
---|
| 1802 | *nwords = 0; |
---|
| 1803 | *orig_line = NULL; |
---|
| 1804 | return (NULL); |
---|
| 1805 | } |
---|
| 1806 | |
---|
| 1807 | /* convert line-feed and tabs into spaces */ |
---|
| 1808 | /* (this guarentees that there will be a space before the */ |
---|
| 1809 | /* null character at the end of the string) */ |
---|
| 1810 | |
---|
| 1811 | str[BIG_STRING-2] = ' '; |
---|
| 1812 | str[BIG_STRING-1] = '\0'; |
---|
| 1813 | |
---|
| 1814 | for (ptr = str, ptr2 = str_copy; *ptr != '\0'; ptr++, ptr2++) { |
---|
| 1815 | *ptr2 = *ptr; |
---|
| 1816 | if (*ptr == '\t') { |
---|
| 1817 | *ptr = ' '; |
---|
| 1818 | *ptr2 = ' '; |
---|
| 1819 | } |
---|
| 1820 | else if (*ptr == '\n') { |
---|
| 1821 | *ptr = ' '; |
---|
| 1822 | *ptr2 = '\0'; |
---|
| 1823 | break; |
---|
| 1824 | } |
---|
| 1825 | } |
---|
| 1826 | |
---|
| 1827 | /* find the words in the line */ |
---|
| 1828 | |
---|
| 1829 | ptr = str; |
---|
| 1830 | while (*ptr != '\0') { |
---|
| 1831 | |
---|
| 1832 | /* jump over leading spaces */ |
---|
| 1833 | while (*ptr == ' ') |
---|
| 1834 | ptr++; |
---|
| 1835 | |
---|
| 1836 | /* break if we reach the end */ |
---|
| 1837 | if (*ptr == '\0') |
---|
| 1838 | break; |
---|
| 1839 | |
---|
| 1840 | /* save pointer to beginning of word */ |
---|
| 1841 | if (num_words >= max_words) { |
---|
| 1842 | max_words += 10; |
---|
| 1843 | words = (char **) realloc (words, sizeof (char *) * max_words); |
---|
| 1844 | } |
---|
| 1845 | words[num_words++] = ptr; |
---|
| 1846 | |
---|
| 1847 | /* jump over non-spaces */ |
---|
| 1848 | while (*ptr != ' ') |
---|
| 1849 | ptr++; |
---|
| 1850 | |
---|
| 1851 | /* place a null character here to mark the end of the word */ |
---|
| 1852 | *ptr++ = '\0'; |
---|
| 1853 | } |
---|
| 1854 | |
---|
| 1855 | /* return the list of words */ |
---|
| 1856 | *nwords = num_words; |
---|
| 1857 | *orig_line = str_copy; |
---|
| 1858 | return (words); |
---|
| 1859 | } |
---|
| 1860 | |
---|
| 1861 | |
---|
| 1862 | /****************************************************************************** |
---|
| 1863 | Return the value of an item, given a pointer to it and its type. |
---|
| 1864 | |
---|
| 1865 | Entry: |
---|
| 1866 | item - pointer to item |
---|
| 1867 | type - data type that "item" points to |
---|
| 1868 | |
---|
| 1869 | Exit: |
---|
| 1870 | returns a double-precision float that contains the value of the item |
---|
| 1871 | ******************************************************************************/ |
---|
| 1872 | |
---|
| 1873 | double get_item_value(char *item, int type) |
---|
| 1874 | { |
---|
| 1875 | unsigned char *puchar; |
---|
| 1876 | char *pchar; |
---|
| 1877 | short int *pshort; |
---|
| 1878 | unsigned short int *pushort; |
---|
| 1879 | int *pint; |
---|
| 1880 | unsigned int *puint; |
---|
| 1881 | float *pfloat; |
---|
| 1882 | double *pdouble; |
---|
| 1883 | int int_value; |
---|
| 1884 | unsigned int uint_value; |
---|
| 1885 | double double_value; |
---|
| 1886 | |
---|
| 1887 | switch (type) { |
---|
| 1888 | case PLY_CHAR: |
---|
| 1889 | pchar = (char *) item; |
---|
| 1890 | int_value = *pchar; |
---|
| 1891 | return ((double) int_value); |
---|
| 1892 | case PLY_UCHAR: |
---|
| 1893 | puchar = (unsigned char *) item; |
---|
| 1894 | int_value = *puchar; |
---|
| 1895 | return ((double) int_value); |
---|
| 1896 | case PLY_SHORT: |
---|
| 1897 | pshort = (short int *) item; |
---|
| 1898 | int_value = *pshort; |
---|
| 1899 | return ((double) int_value); |
---|
| 1900 | case PLY_USHORT: |
---|
| 1901 | pushort = (unsigned short int *) item; |
---|
| 1902 | int_value = *pushort; |
---|
| 1903 | return ((double) int_value); |
---|
| 1904 | case PLY_INT: |
---|
| 1905 | pint = (int *) item; |
---|
| 1906 | int_value = *pint; |
---|
| 1907 | return ((double) int_value); |
---|
| 1908 | case PLY_UINT: |
---|
| 1909 | puint = (unsigned int *) item; |
---|
| 1910 | uint_value = *puint; |
---|
| 1911 | return ((double) uint_value); |
---|
| 1912 | case PLY_FLOAT: |
---|
| 1913 | pfloat = (float *) item; |
---|
| 1914 | double_value = *pfloat; |
---|
| 1915 | return (double_value); |
---|
| 1916 | case PLY_DOUBLE: |
---|
| 1917 | pdouble = (double *) item; |
---|
| 1918 | double_value = *pdouble; |
---|
| 1919 | return (double_value); |
---|
| 1920 | default: |
---|
| 1921 | fprintf (stderr, "get_item_value: bad type = %d\n", type); |
---|
| 1922 | exit (-1); |
---|
| 1923 | } |
---|
| 1924 | |
---|
| 1925 | /* It never gets here, but avoid compiler warning... */ |
---|
| 1926 | return(-1); |
---|
| 1927 | } |
---|
| 1928 | |
---|
| 1929 | |
---|
| 1930 | /****************************************************************************** |
---|
| 1931 | Write out an item to a file as raw binary bytes. |
---|
| 1932 | |
---|
| 1933 | Entry: |
---|
| 1934 | fp - file to write to |
---|
| 1935 | int_val - integer version of item |
---|
| 1936 | uint_val - unsigned integer version of item |
---|
| 1937 | double_val - double-precision float version of item |
---|
| 1938 | type - data type to write out |
---|
| 1939 | ******************************************************************************/ |
---|
| 1940 | |
---|
| 1941 | void write_binary_item( |
---|
| 1942 | FILE *fp, |
---|
| 1943 | int int_val, |
---|
| 1944 | unsigned int uint_val, |
---|
| 1945 | double double_val, |
---|
| 1946 | int type, |
---|
| 1947 | int file_type |
---|
| 1948 | ) |
---|
| 1949 | { |
---|
| 1950 | unsigned char uchar_val; |
---|
| 1951 | char char_val; |
---|
| 1952 | unsigned short ushort_val; |
---|
| 1953 | short short_val; |
---|
| 1954 | float float_val; |
---|
| 1955 | |
---|
| 1956 | |
---|
| 1957 | switch (type) { |
---|
| 1958 | case PLY_CHAR: |
---|
| 1959 | char_val = int_val; |
---|
| 1960 | fwrite (&char_val, 1, 1, fp); |
---|
| 1961 | break; |
---|
| 1962 | case PLY_SHORT: |
---|
| 1963 | short_val = int_val; |
---|
| 1964 | SWAP_TO_ENDIAN2(&short_val, file_type); |
---|
| 1965 | fwrite (&short_val, 2, 1, fp); |
---|
| 1966 | break; |
---|
| 1967 | case PLY_INT: |
---|
| 1968 | SWAP_TO_ENDIAN4(&int_val, file_type); |
---|
| 1969 | fwrite (&int_val, 4, 1, fp); |
---|
| 1970 | break; |
---|
| 1971 | case PLY_UCHAR: |
---|
| 1972 | uchar_val = uint_val; |
---|
| 1973 | fwrite (&uchar_val, 1, 1, fp); |
---|
| 1974 | break; |
---|
| 1975 | case PLY_USHORT: |
---|
| 1976 | ushort_val = uint_val; |
---|
| 1977 | SWAP_TO_ENDIAN2(&ushort_val, file_type); |
---|
| 1978 | fwrite (&ushort_val, 2, 1, fp); |
---|
| 1979 | break; |
---|
| 1980 | case PLY_UINT: |
---|
| 1981 | SWAP_TO_ENDIAN4(&uint_val, file_type); |
---|
| 1982 | fwrite (&uint_val, 4, 1, fp); |
---|
| 1983 | break; |
---|
| 1984 | case PLY_FLOAT: |
---|
| 1985 | float_val = double_val; |
---|
| 1986 | SWAP_TO_ENDIAN4(&float_val, file_type); |
---|
| 1987 | fwrite (&float_val, 4, 1, fp); |
---|
| 1988 | break; |
---|
| 1989 | case PLY_DOUBLE: |
---|
| 1990 | SWAP_TO_ENDIAN8(&double_val, file_type); |
---|
| 1991 | fwrite (&double_val, 8, 1, fp); |
---|
| 1992 | break; |
---|
| 1993 | default: |
---|
| 1994 | fprintf (stderr, "write_binary_item: bad type = %d\n", type); |
---|
| 1995 | exit (-1); |
---|
| 1996 | } |
---|
| 1997 | } |
---|
| 1998 | |
---|
| 1999 | |
---|
| 2000 | /****************************************************************************** |
---|
| 2001 | Write out an item to a file as ascii characters. |
---|
| 2002 | |
---|
| 2003 | Entry: |
---|
| 2004 | fp - file to write to |
---|
| 2005 | int_val - integer version of item |
---|
| 2006 | uint_val - unsigned integer version of item |
---|
| 2007 | double_val - double-precision float version of item |
---|
| 2008 | type - data type to write out |
---|
| 2009 | ******************************************************************************/ |
---|
| 2010 | |
---|
| 2011 | void write_ascii_item( |
---|
| 2012 | FILE *fp, |
---|
| 2013 | int int_val, |
---|
| 2014 | unsigned int uint_val, |
---|
| 2015 | double double_val, |
---|
| 2016 | int type |
---|
| 2017 | ) |
---|
| 2018 | { |
---|
| 2019 | switch (type) { |
---|
| 2020 | case PLY_CHAR: |
---|
| 2021 | case PLY_SHORT: |
---|
| 2022 | case PLY_INT: |
---|
| 2023 | fprintf (fp, "%d ", int_val); |
---|
| 2024 | break; |
---|
| 2025 | case PLY_UCHAR: |
---|
| 2026 | case PLY_USHORT: |
---|
| 2027 | case PLY_UINT: |
---|
| 2028 | fprintf (fp, "%u ", uint_val); |
---|
| 2029 | break; |
---|
| 2030 | case PLY_FLOAT: |
---|
| 2031 | case PLY_DOUBLE: |
---|
| 2032 | fprintf (fp, "%g ", double_val); |
---|
| 2033 | break; |
---|
| 2034 | default: |
---|
| 2035 | fprintf (stderr, "write_ascii_item: bad type = %d\n", type); |
---|
| 2036 | exit (-1); |
---|
| 2037 | } |
---|
| 2038 | } |
---|
| 2039 | |
---|
| 2040 | |
---|
| 2041 | /****************************************************************************** |
---|
| 2042 | Write out an item to a file as ascii characters. |
---|
| 2043 | |
---|
| 2044 | Entry: |
---|
| 2045 | fp - file to write to |
---|
| 2046 | item - pointer to item to write |
---|
| 2047 | type - data type that "item" points to |
---|
| 2048 | |
---|
| 2049 | Exit: |
---|
| 2050 | returns a double-precision float that contains the value of the written item |
---|
| 2051 | ******************************************************************************/ |
---|
| 2052 | |
---|
| 2053 | double old_write_ascii_item(FILE *fp, char *item, int type) |
---|
| 2054 | { |
---|
| 2055 | unsigned char *puchar; |
---|
| 2056 | char *pchar; |
---|
| 2057 | short int *pshort; |
---|
| 2058 | unsigned short int *pushort; |
---|
| 2059 | int *pint; |
---|
| 2060 | unsigned int *puint; |
---|
| 2061 | float *pfloat; |
---|
| 2062 | double *pdouble; |
---|
| 2063 | int int_value; |
---|
| 2064 | unsigned int uint_value; |
---|
| 2065 | double double_value; |
---|
| 2066 | |
---|
| 2067 | switch (type) { |
---|
| 2068 | case PLY_CHAR: |
---|
| 2069 | pchar = (char *) item; |
---|
| 2070 | int_value = *pchar; |
---|
| 2071 | fprintf (fp, "%d ", int_value); |
---|
| 2072 | return ((double) int_value); |
---|
| 2073 | case PLY_UCHAR: |
---|
| 2074 | puchar = (unsigned char *) item; |
---|
| 2075 | int_value = *puchar; |
---|
| 2076 | fprintf (fp, "%d ", int_value); |
---|
| 2077 | return ((double) int_value); |
---|
| 2078 | case PLY_SHORT: |
---|
| 2079 | pshort = (short int *) item; |
---|
| 2080 | int_value = *pshort; |
---|
| 2081 | fprintf (fp, "%d ", int_value); |
---|
| 2082 | return ((double) int_value); |
---|
| 2083 | case PLY_USHORT: |
---|
| 2084 | pushort = (unsigned short int *) item; |
---|
| 2085 | int_value = *pushort; |
---|
| 2086 | fprintf (fp, "%d ", int_value); |
---|
| 2087 | return ((double) int_value); |
---|
| 2088 | case PLY_INT: |
---|
| 2089 | pint = (int *) item; |
---|
| 2090 | int_value = *pint; |
---|
| 2091 | fprintf (fp, "%d ", int_value); |
---|
| 2092 | return ((double) int_value); |
---|
| 2093 | case PLY_UINT: |
---|
| 2094 | puint = (unsigned int *) item; |
---|
| 2095 | uint_value = *puint; |
---|
| 2096 | fprintf (fp, "%u ", uint_value); |
---|
| 2097 | return ((double) uint_value); |
---|
| 2098 | case PLY_FLOAT: |
---|
| 2099 | pfloat = (float *) item; |
---|
| 2100 | double_value = *pfloat; |
---|
| 2101 | fprintf (fp, "%g ", double_value); |
---|
| 2102 | return (double_value); |
---|
| 2103 | case PLY_DOUBLE: |
---|
| 2104 | pdouble = (double *) item; |
---|
| 2105 | double_value = *pdouble; |
---|
| 2106 | fprintf (fp, "%g ", double_value); |
---|
| 2107 | return (double_value); |
---|
| 2108 | default: |
---|
| 2109 | fprintf (stderr, "old_write_ascii_item: bad type = %d\n", type); |
---|
| 2110 | exit (-1); |
---|
| 2111 | } |
---|
| 2112 | |
---|
| 2113 | /* It never gets here, but avoid compiler warning... */ |
---|
| 2114 | return(-1); |
---|
| 2115 | } |
---|
| 2116 | |
---|
| 2117 | |
---|
| 2118 | /****************************************************************************** |
---|
| 2119 | Get the value of an item that is in memory, and place the result |
---|
| 2120 | into an integer, an unsigned integer and a double. |
---|
| 2121 | |
---|
| 2122 | Entry: |
---|
| 2123 | ptr - pointer to the item |
---|
| 2124 | type - data type supposedly in the item |
---|
| 2125 | |
---|
| 2126 | Exit: |
---|
| 2127 | int_val - integer value |
---|
| 2128 | uint_val - unsigned integer value |
---|
| 2129 | double_val - double-precision floating point value |
---|
| 2130 | ******************************************************************************/ |
---|
| 2131 | |
---|
| 2132 | void get_stored_item( |
---|
| 2133 | void *ptr, |
---|
| 2134 | int type, |
---|
| 2135 | int *int_val, |
---|
| 2136 | unsigned int *uint_val, |
---|
| 2137 | double *double_val |
---|
| 2138 | ) |
---|
| 2139 | { |
---|
| 2140 | switch (type) { |
---|
| 2141 | case PLY_CHAR: |
---|
| 2142 | *int_val = *((char *) ptr); |
---|
| 2143 | *uint_val = *int_val; |
---|
| 2144 | *double_val = *int_val; |
---|
| 2145 | break; |
---|
| 2146 | case PLY_UCHAR: |
---|
| 2147 | *uint_val = *((unsigned char *) ptr); |
---|
| 2148 | *int_val = *uint_val; |
---|
| 2149 | *double_val = *uint_val; |
---|
| 2150 | break; |
---|
| 2151 | case PLY_SHORT: |
---|
| 2152 | *int_val = *((short int *) ptr); |
---|
| 2153 | *uint_val = *int_val; |
---|
| 2154 | *double_val = *int_val; |
---|
| 2155 | break; |
---|
| 2156 | case PLY_USHORT: |
---|
| 2157 | *uint_val = *((unsigned short int *) ptr); |
---|
| 2158 | *int_val = *uint_val; |
---|
| 2159 | *double_val = *uint_val; |
---|
| 2160 | break; |
---|
| 2161 | case PLY_INT: |
---|
| 2162 | *int_val = *((int *) ptr); |
---|
| 2163 | *uint_val = *int_val; |
---|
| 2164 | *double_val = *int_val; |
---|
| 2165 | break; |
---|
| 2166 | case PLY_UINT: |
---|
| 2167 | *uint_val = *((unsigned int *) ptr); |
---|
| 2168 | *int_val = *uint_val; |
---|
| 2169 | *double_val = *uint_val; |
---|
| 2170 | break; |
---|
| 2171 | case PLY_FLOAT: |
---|
| 2172 | *double_val = *((float *) ptr); |
---|
| 2173 | *int_val = *double_val; |
---|
| 2174 | *uint_val = *double_val; |
---|
| 2175 | break; |
---|
| 2176 | case PLY_DOUBLE: |
---|
| 2177 | *double_val = *((double *) ptr); |
---|
| 2178 | *int_val = *double_val; |
---|
| 2179 | *uint_val = *double_val; |
---|
| 2180 | break; |
---|
| 2181 | default: |
---|
| 2182 | fprintf (stderr, "get_stored_item: bad type = %d\n", type); |
---|
| 2183 | exit (-1); |
---|
| 2184 | } |
---|
| 2185 | } |
---|
| 2186 | |
---|
| 2187 | |
---|
| 2188 | /****************************************************************************** |
---|
| 2189 | Get the value of an item from a binary file, and place the result |
---|
| 2190 | into an integer, an unsigned integer and a double. |
---|
| 2191 | |
---|
| 2192 | Entry: |
---|
| 2193 | fp - file to get item from |
---|
| 2194 | type - data type supposedly in the word |
---|
| 2195 | |
---|
| 2196 | Exit: |
---|
| 2197 | int_val - integer value |
---|
| 2198 | uint_val - unsigned integer value |
---|
| 2199 | double_val - double-precision floating point value |
---|
| 2200 | ******************************************************************************/ |
---|
| 2201 | |
---|
| 2202 | void get_binary_item( |
---|
| 2203 | FILE *fp, |
---|
| 2204 | int type, |
---|
| 2205 | int *int_val, |
---|
| 2206 | unsigned int *uint_val, |
---|
| 2207 | double *double_val, |
---|
| 2208 | int file_type |
---|
| 2209 | ) |
---|
| 2210 | { |
---|
| 2211 | char c[8]; |
---|
| 2212 | void *ptr; |
---|
| 2213 | |
---|
| 2214 | ptr = (void *) c; |
---|
| 2215 | |
---|
| 2216 | switch (type) { |
---|
| 2217 | case PLY_CHAR: |
---|
| 2218 | fread (ptr, 1, 1, fp); |
---|
| 2219 | *int_val = *((char *) ptr); |
---|
| 2220 | *uint_val = *int_val; |
---|
| 2221 | *double_val = *int_val; |
---|
| 2222 | break; |
---|
| 2223 | case PLY_UCHAR: |
---|
| 2224 | fread (ptr, 1, 1, fp); |
---|
| 2225 | *uint_val = *((unsigned char *) ptr); |
---|
| 2226 | *int_val = *uint_val; |
---|
| 2227 | *double_val = *uint_val; |
---|
| 2228 | break; |
---|
| 2229 | case PLY_SHORT: |
---|
| 2230 | fread (ptr, 2, 1, fp); |
---|
| 2231 | SWAP_TO_ENDIAN2(ptr, file_type); |
---|
| 2232 | *int_val = *((short int *) ptr); |
---|
| 2233 | *uint_val = *int_val; |
---|
| 2234 | *double_val = *int_val; |
---|
| 2235 | break; |
---|
| 2236 | case PLY_USHORT: |
---|
| 2237 | fread (ptr, 2, 1, fp); |
---|
| 2238 | SWAP_TO_ENDIAN2(ptr, file_type); |
---|
| 2239 | *uint_val = *((unsigned short int *) ptr); |
---|
| 2240 | *int_val = *uint_val; |
---|
| 2241 | *double_val = *uint_val; |
---|
| 2242 | break; |
---|
| 2243 | case PLY_INT: |
---|
| 2244 | fread (ptr, 4, 1, fp); |
---|
| 2245 | SWAP_TO_ENDIAN4(ptr, file_type); |
---|
| 2246 | *int_val = *((int *) ptr); |
---|
| 2247 | *uint_val = *int_val; |
---|
| 2248 | *double_val = *int_val; |
---|
| 2249 | break; |
---|
| 2250 | case PLY_UINT: |
---|
| 2251 | fread (ptr, 4, 1, fp); |
---|
| 2252 | SWAP_TO_ENDIAN4(ptr, file_type); |
---|
| 2253 | *uint_val = *((unsigned int *) ptr); |
---|
| 2254 | *int_val = *uint_val; |
---|
| 2255 | *double_val = *uint_val; |
---|
| 2256 | break; |
---|
| 2257 | case PLY_FLOAT: |
---|
| 2258 | fread (ptr, 4, 1, fp); |
---|
| 2259 | SWAP_TO_ENDIAN4(ptr, file_type); |
---|
| 2260 | *double_val = *((float *) ptr); |
---|
| 2261 | *int_val = *double_val; |
---|
| 2262 | *uint_val = *double_val; |
---|
| 2263 | break; |
---|
| 2264 | case PLY_DOUBLE: |
---|
| 2265 | fread (ptr, 8, 1, fp); |
---|
| 2266 | SWAP_TO_ENDIAN8(ptr, file_type); |
---|
| 2267 | *double_val = *((double *) ptr); |
---|
| 2268 | *int_val = *double_val; |
---|
| 2269 | *uint_val = *double_val; |
---|
| 2270 | break; |
---|
| 2271 | default: |
---|
| 2272 | fprintf (stderr, "get_binary_item: bad type = %d\n", type); |
---|
| 2273 | exit (-1); |
---|
| 2274 | } |
---|
| 2275 | } |
---|
| 2276 | |
---|
| 2277 | |
---|
| 2278 | /****************************************************************************** |
---|
| 2279 | Extract the value of an item from an ascii word, and place the result |
---|
| 2280 | into an integer, an unsigned integer and a double. |
---|
| 2281 | |
---|
| 2282 | Entry: |
---|
| 2283 | word - word to extract value from |
---|
| 2284 | type - data type supposedly in the word |
---|
| 2285 | |
---|
| 2286 | Exit: |
---|
| 2287 | int_val - integer value |
---|
| 2288 | uint_val - unsigned integer value |
---|
| 2289 | double_val - double-precision floating point value |
---|
| 2290 | ******************************************************************************/ |
---|
| 2291 | |
---|
| 2292 | void get_ascii_item( |
---|
| 2293 | char *word, |
---|
| 2294 | int type, |
---|
| 2295 | int *int_val, |
---|
| 2296 | unsigned int *uint_val, |
---|
| 2297 | double *double_val |
---|
| 2298 | ) |
---|
| 2299 | { |
---|
| 2300 | switch (type) { |
---|
| 2301 | case PLY_CHAR: |
---|
| 2302 | case PLY_UCHAR: |
---|
| 2303 | case PLY_SHORT: |
---|
| 2304 | case PLY_USHORT: |
---|
| 2305 | case PLY_INT: |
---|
| 2306 | *int_val = atoi (word); |
---|
| 2307 | *uint_val = *int_val; |
---|
| 2308 | *double_val = *int_val; |
---|
| 2309 | break; |
---|
| 2310 | |
---|
| 2311 | case PLY_UINT: |
---|
| 2312 | *uint_val = strtoul (word, (char **) NULL, 10); |
---|
| 2313 | *int_val = *uint_val; |
---|
| 2314 | *double_val = *uint_val; |
---|
| 2315 | break; |
---|
| 2316 | |
---|
| 2317 | case PLY_FLOAT: |
---|
| 2318 | case PLY_DOUBLE: |
---|
| 2319 | *double_val = atof (word); |
---|
| 2320 | *int_val = (int) *double_val; |
---|
| 2321 | *uint_val = (unsigned int) *double_val; |
---|
| 2322 | break; |
---|
| 2323 | |
---|
| 2324 | default: |
---|
| 2325 | fprintf (stderr, "get_ascii_item: bad type = %d\n", type); |
---|
| 2326 | exit (-1); |
---|
| 2327 | } |
---|
| 2328 | } |
---|
| 2329 | |
---|
| 2330 | |
---|
| 2331 | /****************************************************************************** |
---|
| 2332 | Store a value into a place being pointed to, guided by a data type. |
---|
| 2333 | |
---|
| 2334 | Entry: |
---|
| 2335 | item - place to store value |
---|
| 2336 | type - data type |
---|
| 2337 | int_val - integer version of value |
---|
| 2338 | uint_val - unsigned integer version of value |
---|
| 2339 | double_val - double version of value |
---|
| 2340 | |
---|
| 2341 | Exit: |
---|
| 2342 | item - pointer to stored value |
---|
| 2343 | ******************************************************************************/ |
---|
| 2344 | |
---|
| 2345 | void store_item ( |
---|
| 2346 | char *item, |
---|
| 2347 | int type, |
---|
| 2348 | int int_val, |
---|
| 2349 | unsigned int uint_val, |
---|
| 2350 | double double_val |
---|
| 2351 | ) |
---|
| 2352 | { |
---|
| 2353 | unsigned char *puchar; |
---|
| 2354 | short int *pshort; |
---|
| 2355 | unsigned short int *pushort; |
---|
| 2356 | int *pint; |
---|
| 2357 | unsigned int *puint; |
---|
| 2358 | float *pfloat; |
---|
| 2359 | double *pdouble; |
---|
| 2360 | |
---|
| 2361 | switch (type) { |
---|
| 2362 | case PLY_CHAR: |
---|
| 2363 | *item = int_val; |
---|
| 2364 | break; |
---|
| 2365 | case PLY_UCHAR: |
---|
| 2366 | puchar = (unsigned char *) item; |
---|
| 2367 | *puchar = uint_val; |
---|
| 2368 | break; |
---|
| 2369 | case PLY_SHORT: |
---|
| 2370 | pshort = (short *) item; |
---|
| 2371 | *pshort = int_val; |
---|
| 2372 | break; |
---|
| 2373 | case PLY_USHORT: |
---|
| 2374 | pushort = (unsigned short *) item; |
---|
| 2375 | *pushort = uint_val; |
---|
| 2376 | break; |
---|
| 2377 | case PLY_INT: |
---|
| 2378 | pint = (int *) item; |
---|
| 2379 | *pint = int_val; |
---|
| 2380 | break; |
---|
| 2381 | case PLY_UINT: |
---|
| 2382 | puint = (unsigned int *) item; |
---|
| 2383 | *puint = uint_val; |
---|
| 2384 | break; |
---|
| 2385 | case PLY_FLOAT: |
---|
| 2386 | pfloat = (float *) item; |
---|
| 2387 | *pfloat = double_val; |
---|
| 2388 | break; |
---|
| 2389 | case PLY_DOUBLE: |
---|
| 2390 | pdouble = (double *) item; |
---|
| 2391 | *pdouble = double_val; |
---|
| 2392 | break; |
---|
| 2393 | default: |
---|
| 2394 | fprintf (stderr, "store_item: bad type = %d\n", type); |
---|
| 2395 | exit (-1); |
---|
| 2396 | } |
---|
| 2397 | } |
---|
| 2398 | |
---|
| 2399 | |
---|
| 2400 | /****************************************************************************** |
---|
| 2401 | Add an element to a PLY file descriptor. |
---|
| 2402 | |
---|
| 2403 | Entry: |
---|
| 2404 | plyfile - PLY file descriptor |
---|
| 2405 | words - list of words describing the element |
---|
| 2406 | nwords - number of words in the list |
---|
| 2407 | ******************************************************************************/ |
---|
| 2408 | |
---|
| 2409 | void add_element (PlyFile *plyfile, char **words, int nwords) |
---|
| 2410 | { |
---|
| 2411 | PlyElement *elem; |
---|
| 2412 | |
---|
| 2413 | /* create the new element */ |
---|
| 2414 | elem = (PlyElement *) myalloc (sizeof (PlyElement)); |
---|
| 2415 | elem->name = strdup (words[1]); |
---|
| 2416 | elem->num = atoi (words[2]); |
---|
| 2417 | elem->nprops = 0; |
---|
| 2418 | |
---|
| 2419 | /* make room for new element in the object's list of elements */ |
---|
| 2420 | if (plyfile->nelems == 0) |
---|
| 2421 | plyfile->elems = (PlyElement **) myalloc (sizeof (PlyElement *)); |
---|
| 2422 | else |
---|
| 2423 | plyfile->elems = (PlyElement **) realloc (plyfile->elems, |
---|
| 2424 | sizeof (PlyElement *) * (plyfile->nelems + 1)); |
---|
| 2425 | |
---|
| 2426 | /* add the new element to the object's list */ |
---|
| 2427 | plyfile->elems[plyfile->nelems] = elem; |
---|
| 2428 | plyfile->nelems++; |
---|
| 2429 | } |
---|
| 2430 | |
---|
| 2431 | |
---|
| 2432 | /****************************************************************************** |
---|
| 2433 | Return the type of a property, given the name of the property. |
---|
| 2434 | |
---|
| 2435 | Entry: |
---|
| 2436 | name - name of property type |
---|
| 2437 | |
---|
| 2438 | Exit: |
---|
| 2439 | returns integer code for property, or 0 if not found |
---|
| 2440 | ******************************************************************************/ |
---|
| 2441 | |
---|
| 2442 | int get_prop_type(char *type_name) |
---|
| 2443 | { |
---|
| 2444 | int i; |
---|
| 2445 | |
---|
| 2446 | for (i = PLY_START_TYPE + 1; i < PLY_END_TYPE; i++) |
---|
| 2447 | if (equal_strings (type_name, type_names[i])) |
---|
| 2448 | return (i); |
---|
| 2449 | |
---|
| 2450 | /* if we get here, we didn't find the type */ |
---|
| 2451 | return (0); |
---|
| 2452 | } |
---|
| 2453 | |
---|
| 2454 | |
---|
| 2455 | /****************************************************************************** |
---|
| 2456 | Add a property to a PLY file descriptor. |
---|
| 2457 | |
---|
| 2458 | Entry: |
---|
| 2459 | plyfile - PLY file descriptor |
---|
| 2460 | words - list of words describing the property |
---|
| 2461 | nwords - number of words in the list |
---|
| 2462 | ******************************************************************************/ |
---|
| 2463 | |
---|
| 2464 | void add_property (PlyFile *plyfile, char **words, int nwords) |
---|
| 2465 | { |
---|
| 2466 | int prop_type; |
---|
| 2467 | int count_type; |
---|
| 2468 | PlyProperty *prop; |
---|
| 2469 | PlyElement *elem; |
---|
| 2470 | |
---|
| 2471 | /* create the new property */ |
---|
| 2472 | |
---|
| 2473 | prop = (PlyProperty *) myalloc (sizeof (PlyProperty)); |
---|
| 2474 | |
---|
| 2475 | if (equal_strings (words[1], "list")) { /* is a list */ |
---|
| 2476 | prop->count_external = get_prop_type (words[2]); |
---|
| 2477 | prop->external_type = get_prop_type (words[3]); |
---|
| 2478 | prop->name = strdup (words[4]); |
---|
| 2479 | prop->is_list = 1; |
---|
| 2480 | } |
---|
| 2481 | else { /* not a list */ |
---|
| 2482 | prop->external_type = get_prop_type (words[1]); |
---|
| 2483 | prop->name = strdup (words[2]); |
---|
| 2484 | prop->is_list = 0; |
---|
| 2485 | } |
---|
| 2486 | |
---|
| 2487 | /* add this property to the list of properties of the current element */ |
---|
| 2488 | |
---|
| 2489 | elem = plyfile->elems[plyfile->nelems - 1]; |
---|
| 2490 | |
---|
| 2491 | if (elem->nprops == 0) |
---|
| 2492 | elem->props = (PlyProperty **) myalloc (sizeof (PlyProperty *)); |
---|
| 2493 | else |
---|
| 2494 | elem->props = (PlyProperty **) realloc (elem->props, |
---|
| 2495 | sizeof (PlyProperty *) * (elem->nprops + 1)); |
---|
| 2496 | |
---|
| 2497 | elem->props[elem->nprops] = prop; |
---|
| 2498 | elem->nprops++; |
---|
| 2499 | } |
---|
| 2500 | |
---|
| 2501 | |
---|
| 2502 | /****************************************************************************** |
---|
| 2503 | Add a comment to a PLY file descriptor. |
---|
| 2504 | |
---|
| 2505 | Entry: |
---|
| 2506 | plyfile - PLY file descriptor |
---|
| 2507 | line - line containing comment |
---|
| 2508 | ******************************************************************************/ |
---|
| 2509 | |
---|
| 2510 | void add_comment (PlyFile *plyfile, char *line) |
---|
| 2511 | { |
---|
| 2512 | int i; |
---|
| 2513 | |
---|
| 2514 | /* skip over "comment" and leading spaces and tabs */ |
---|
| 2515 | i = 7; |
---|
| 2516 | while (line[i] == ' ' || line[i] == '\t') |
---|
| 2517 | i++; |
---|
| 2518 | |
---|
| 2519 | ply_put_comment (plyfile, &line[i]); |
---|
| 2520 | } |
---|
| 2521 | |
---|
| 2522 | |
---|
| 2523 | /****************************************************************************** |
---|
| 2524 | Add a some object information to a PLY file descriptor. |
---|
| 2525 | |
---|
| 2526 | Entry: |
---|
| 2527 | plyfile - PLY file descriptor |
---|
| 2528 | line - line containing text info |
---|
| 2529 | ******************************************************************************/ |
---|
| 2530 | |
---|
| 2531 | void add_obj_info (PlyFile *plyfile, char *line) |
---|
| 2532 | { |
---|
| 2533 | int i; |
---|
| 2534 | |
---|
| 2535 | /* skip over "obj_info" and leading spaces and tabs */ |
---|
| 2536 | i = 8; |
---|
| 2537 | while (line[i] == ' ' || line[i] == '\t') |
---|
| 2538 | i++; |
---|
| 2539 | |
---|
| 2540 | ply_put_obj_info (plyfile, &line[i]); |
---|
| 2541 | } |
---|
| 2542 | |
---|
| 2543 | |
---|
| 2544 | /****************************************************************************** |
---|
| 2545 | Copy a property. |
---|
| 2546 | ******************************************************************************/ |
---|
| 2547 | |
---|
| 2548 | void copy_property(PlyProperty *dest, PlyProperty *src) |
---|
| 2549 | { |
---|
| 2550 | dest->name = strdup (src->name); |
---|
| 2551 | dest->external_type = src->external_type; |
---|
| 2552 | dest->internal_type = src->internal_type; |
---|
| 2553 | dest->offset = src->offset; |
---|
| 2554 | |
---|
| 2555 | dest->is_list = src->is_list; |
---|
| 2556 | dest->count_external = src->count_external; |
---|
| 2557 | dest->count_internal = src->count_internal; |
---|
| 2558 | dest->count_offset = src->count_offset; |
---|
| 2559 | } |
---|
| 2560 | |
---|
| 2561 | |
---|
| 2562 | /****************************************************************************** |
---|
| 2563 | Allocate some memory. |
---|
| 2564 | |
---|
| 2565 | Entry: |
---|
| 2566 | size - amount of memory requested (in bytes) |
---|
| 2567 | lnum - line number from which memory was requested |
---|
| 2568 | fname - file name from which memory was requested |
---|
| 2569 | ******************************************************************************/ |
---|
| 2570 | |
---|
| 2571 | char *my_alloc(int size, int lnum, char *fname) |
---|
| 2572 | { |
---|
| 2573 | char *ptr; |
---|
| 2574 | |
---|
| 2575 | ptr = (char *) malloc (size); |
---|
| 2576 | |
---|
| 2577 | if (ptr == 0) { |
---|
| 2578 | fprintf(stderr, "Memory allocation bombed on line %d in %s\n", lnum, fname); |
---|
| 2579 | } |
---|
| 2580 | |
---|
| 2581 | return (ptr); |
---|
| 2582 | } |
---|
| 2583 | |
---|
| 2584 | |
---|
| 2585 | /****************************************************************************** |
---|
| 2586 | Determine whether a property currently exists for an element. |
---|
| 2587 | |
---|
| 2588 | Entry: |
---|
| 2589 | plyfile - file identifier |
---|
| 2590 | elem_name - name of element that information is being specified about |
---|
| 2591 | prop_name - name of property to find |
---|
| 2592 | ******************************************************************************/ |
---|
| 2593 | |
---|
| 2594 | int |
---|
| 2595 | ply_is_valid_property(PlyFile *plyfile, char *elem_name, char *prop_name) |
---|
| 2596 | { |
---|
| 2597 | int i; |
---|
| 2598 | PlyElement *elem; |
---|
| 2599 | PlyProperty *prop; |
---|
| 2600 | int index; |
---|
| 2601 | |
---|
| 2602 | /* find information about the element */ |
---|
| 2603 | elem = find_element (plyfile, elem_name); |
---|
| 2604 | plyfile->which_elem = elem; |
---|
| 2605 | prop = find_property (elem, prop_name, &index); |
---|
| 2606 | |
---|
| 2607 | return (prop!=NULL); |
---|
| 2608 | } |
---|
| 2609 | |
---|