[37] | 1 | /* |
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| 2 | |
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| 3 | Skeleton of program that manipulates a PLY object. (Was plyxform.) |
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| 4 | |
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| 5 | Greg Turk, August 1994 |
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| 6 | |
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| 7 | */ |
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| 8 | |
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| 9 | #include <stdio.h> |
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| 10 | #include <math.h> |
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| 11 | #include <string.h> |
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| 12 | #include <ply.h> |
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| 13 | #include <limits.h> |
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| 14 | #include <stdlib.h> |
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| 15 | |
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| 16 | void write_file(char *filename); |
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| 17 | void read_file(char *filename); |
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| 18 | void usage(char *progname); |
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| 19 | |
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| 20 | // Must have at least one element to describe or this blows up!!!! |
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| 21 | // ply bug!!! |
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| 22 | |
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| 23 | /* user's vertex definitions for a polygonal object */ |
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| 24 | |
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| 25 | typedef struct Vertex { |
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| 26 | float x,y,z; |
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| 27 | void *other_props; /* other properties */ |
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| 28 | } Vertex; |
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| 29 | |
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| 30 | char *elem_names[] = { /* list of the kinds of elements in the user's object */ |
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| 31 | "vertex" |
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| 32 | }; |
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| 33 | |
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| 34 | PlyProperty vert_props[] = { /* list of property information for a vertex */ |
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| 35 | {"x", PLY_FLOAT, PLY_FLOAT, offsetof(Vertex,x), 0, 0, 0, 0}, |
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| 36 | {"y", PLY_FLOAT, PLY_FLOAT, offsetof(Vertex,y), 0, 0, 0, 0}, |
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| 37 | {"z", PLY_FLOAT, PLY_FLOAT, offsetof(Vertex,z), 0, 0, 0, 0}, |
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| 38 | }; |
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| 39 | |
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| 40 | |
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| 41 | /*** the PLY object ***/ |
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| 42 | |
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| 43 | static int nverts; |
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| 44 | static Vertex **vlist; |
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| 45 | static PlyOtherElems *other_elements = NULL; |
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| 46 | static PlyOtherProp *vert_other; |
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| 47 | static int nelems; |
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| 48 | static char **elist; |
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| 49 | static int num_comments; |
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| 50 | static char **comments; |
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| 51 | static int num_obj_info; |
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| 52 | static char **obj_info; |
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| 53 | static int file_type; |
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| 54 | static char **new_info; |
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| 55 | static char num_new_info; |
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| 56 | |
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| 57 | |
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| 58 | /****************************************************************************** |
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| 59 | Main program. |
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| 60 | ******************************************************************************/ |
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| 61 | |
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| 62 | main(int argc, char *argv[]) |
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| 63 | { |
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| 64 | int i; |
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| 65 | char *progname; |
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| 66 | char *filename; |
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| 67 | |
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| 68 | progname = argv[0]; |
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| 69 | |
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| 70 | if (argc < 3) { |
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| 71 | usage(progname); |
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| 72 | exit(1); |
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| 73 | } |
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| 74 | |
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| 75 | /* Check arg1 is filename, not flag */ |
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| 76 | if (argv[1][0] == '-') { |
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| 77 | if (strlen(argv[1]) == 1) { |
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| 78 | /* Ok. The "-" arg means use stdin/stdout */ |
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| 79 | } else { |
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| 80 | fprintf(stderr, "Error: Unhandled arg: %s\n", argv[1]); |
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| 81 | usage(progname); |
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| 82 | exit(-1); |
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| 83 | } |
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| 84 | } |
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| 85 | |
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| 86 | filename = argv[1]; |
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| 87 | |
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| 88 | num_new_info = 0; |
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| 89 | new_info = (char **)malloc((argc - 2)*sizeof(char *)); |
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| 90 | for (i = 2; i < argc; i++) { |
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| 91 | new_info[num_new_info] = (char *)malloc(PATH_MAX*sizeof(char)); |
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| 92 | new_info[num_new_info][0] = 0; |
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| 93 | strcat(new_info[num_new_info], argv[i]); |
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| 94 | num_new_info++; |
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| 95 | } |
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| 96 | |
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| 97 | read_file(filename); |
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| 98 | write_file(filename); |
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| 99 | |
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| 100 | return 0; |
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| 101 | } |
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| 102 | |
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| 103 | |
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| 104 | /****************************************************************************** |
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| 105 | Print out usage information. |
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| 106 | ******************************************************************************/ |
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| 107 | void |
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| 108 | usage(char *progname) |
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| 109 | { |
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| 110 | fprintf (stderr, "Usage: %s file.ply 'info_1' ... 'info_n'\n", progname); |
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| 111 | fprintf (stderr, " or: %s - 'info_1' ... 'info_n' < in.ply > out.ply\n", |
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| 112 | progname); |
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| 113 | } |
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| 114 | |
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| 115 | |
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| 116 | /****************************************************************************** |
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| 117 | Read in the PLY file from standard in. |
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| 118 | ******************************************************************************/ |
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| 119 | void |
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| 120 | read_file(char *filename) |
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| 121 | { |
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| 122 | int i; |
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| 123 | PlyFile *ply; |
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| 124 | int nprops; |
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| 125 | int num_elems; |
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| 126 | char *elem_name; |
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| 127 | float version; |
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| 128 | |
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| 129 | |
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| 130 | /*** Read in the original PLY object ***/ |
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| 131 | if (!strcmp(filename, "-")) { |
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| 132 | ply = ply_read (stdin, &nelems, &elist); |
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| 133 | file_type = ply->file_type; |
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| 134 | } else { |
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| 135 | ply = |
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| 136 | ply_open_for_reading(filename, &nelems, &elist, &file_type, &version); |
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| 137 | } |
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| 138 | |
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| 139 | if (ply == NULL) { |
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| 140 | fprintf(stderr, "Could not open file %s for reading.\n", filename); |
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| 141 | exit(1); |
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| 142 | } |
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| 143 | |
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| 144 | for (i = 0; i < nelems; i++) { |
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| 145 | |
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| 146 | /* get the description of the first element */ |
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| 147 | elem_name = elist[i]; |
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| 148 | ply_get_element_description (ply, elem_name, &num_elems, &nprops); |
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| 149 | |
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| 150 | if (equal_strings ("vertex", elem_name)) { |
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| 151 | |
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| 152 | /* create a vertex list to hold all the vertices */ |
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| 153 | vlist = (Vertex **) malloc (sizeof (Vertex *) * num_elems); |
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| 154 | nverts = num_elems; |
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| 155 | |
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| 156 | /* set up for getting vertex elements */ |
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| 157 | |
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| 158 | ply_get_property (ply, elem_name, &vert_props[0]); |
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| 159 | ply_get_property (ply, elem_name, &vert_props[1]); |
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| 160 | ply_get_property (ply, elem_name, &vert_props[2]); |
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| 161 | vert_other = ply_get_other_properties (ply, elem_name, |
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| 162 | offsetof(Vertex,other_props)); |
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| 163 | |
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| 164 | /* grab all the vertex elements */ |
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| 165 | for (int j = 0; j < num_elems; j++) { |
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| 166 | vlist[j] = (Vertex *) malloc (sizeof (Vertex)); |
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| 167 | ply_get_element (ply, (void *) vlist[j]); |
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| 168 | } |
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| 169 | } |
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| 170 | else |
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| 171 | other_elements = ply_get_other_element (ply, elem_name, num_elems); |
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| 172 | } |
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| 173 | |
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| 174 | comments = ply_get_comments (ply, &num_comments); |
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| 175 | obj_info = ply_get_obj_info (ply, &num_obj_info); |
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| 176 | |
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| 177 | ply_close (ply); |
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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 | Write out the PLY file to standard out. |
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| 183 | ******************************************************************************/ |
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| 184 | void |
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| 185 | write_file(char *filename) |
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| 186 | { |
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| 187 | int i; |
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| 188 | PlyFile *ply; |
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| 189 | float version; |
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| 190 | |
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| 191 | /*** Write out the final PLY object ***/ |
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| 192 | |
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| 193 | if (!strcmp(filename, "-")) { |
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| 194 | ply = ply_write(stdout, nelems, elist, file_type); |
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| 195 | } else { |
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| 196 | ply = ply_open_for_writing(filename, nelems, elist, file_type, &version); |
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| 197 | } |
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| 198 | |
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| 199 | |
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| 200 | if (ply == NULL) { |
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| 201 | printf("Could not open file %s for writing.\n", filename); |
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| 202 | exit(1); |
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| 203 | } |
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| 204 | |
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| 205 | /* describe what properties go into the vertex elements */ |
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| 206 | |
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| 207 | ply_element_count (ply, "vertex", nverts); |
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| 208 | ply_describe_property (ply, "vertex", &vert_props[0]); |
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| 209 | ply_describe_property (ply, "vertex", &vert_props[1]); |
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| 210 | ply_describe_property (ply, "vertex", &vert_props[2]); |
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| 211 | ply_describe_other_properties (ply, vert_other, offsetof(Vertex,other_props)); |
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| 212 | |
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| 213 | ply_describe_other_elements (ply, other_elements); |
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| 214 | |
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| 215 | for (i = 0; i < num_comments; i++) |
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| 216 | ply_put_comment (ply, comments[i]); |
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| 217 | |
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| 218 | for (i = 0; i < num_obj_info; i++) |
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| 219 | ply_put_obj_info (ply, obj_info[i]); |
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| 220 | |
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| 221 | for (i = 0; i < num_new_info; i++) |
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| 222 | ply_put_obj_info (ply, new_info[i]); |
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| 223 | |
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| 224 | ply_header_complete (ply); |
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| 225 | |
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| 226 | /* set up and write the vertex elements */ |
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| 227 | ply_put_element_setup (ply, "vertex"); |
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| 228 | for (i = 0; i < nverts; i++) |
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| 229 | ply_put_element (ply, (void *) vlist[i]); |
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| 230 | |
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| 231 | ply_put_other_elements (ply); |
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| 232 | |
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| 233 | /* close the PLY file */ |
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| 234 | ply_close (ply); |
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| 235 | } |
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| 236 | |
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