1 | /* |
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2 | |
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3 | */ |
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4 | |
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5 | #include <stdio.h> |
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6 | #include <stdlib.h> |
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7 | #include <math.h> |
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8 | #include <malloc.h> |
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9 | #include <ply.h> |
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10 | |
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11 | |
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12 | /* user's vertex and face definitions for a polygonal object */ |
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13 | |
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14 | typedef struct Vertex { |
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15 | float x,y,z; |
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16 | char *other_props; |
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17 | } Vertex; |
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18 | |
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19 | char *elem_names[] = { /* list of the kinds of elements in the user's object */ |
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20 | "vertex" |
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21 | }; |
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22 | |
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23 | PlyProperty vert_props[] = { /* list of property information for a vertex */ |
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24 | {"x", PLY_FLOAT, PLY_FLOAT, offsetof(Vertex,x), 0, 0, 0, 0}, |
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25 | {"y", PLY_FLOAT, PLY_FLOAT, offsetof(Vertex,y), 0, 0, 0, 0}, |
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26 | {"z", PLY_FLOAT, PLY_FLOAT, offsetof(Vertex,z), 0, 0, 0, 0}, |
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27 | }; |
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28 | |
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29 | |
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30 | /*** the PLY object ***/ |
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31 | |
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32 | int nverts; |
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33 | Vertex **vlist; |
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34 | PlyOtherElems *other_elements = NULL; |
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35 | PlyOtherProp *vert_other; |
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36 | int nelems; |
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37 | char **elist; |
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38 | int num_comments; |
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39 | char **comments; |
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40 | int num_obj_info; |
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41 | char **obj_info; |
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42 | int file_type; |
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43 | |
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44 | static float scale; |
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45 | |
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46 | void usage(char *progname); |
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47 | void write_file(); |
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48 | void read_file(FILE *inFile); |
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49 | |
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50 | |
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51 | /****************************************************************************** |
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52 | Transform a PLY file. |
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53 | ******************************************************************************/ |
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54 | |
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55 | int |
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56 | main(int argc, char *argv[]) |
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57 | { |
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58 | int i,j; |
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59 | char *s; |
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60 | char *progname; |
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61 | |
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62 | char *inName = NULL; |
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63 | FILE *inFile = NULL; |
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64 | |
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65 | progname = argv[0]; |
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66 | |
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67 | scale = 1; |
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68 | |
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69 | /* Read all the -args */ |
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70 | while (--argc > 0 && (*++argv)[0]=='-') { |
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71 | for (s = argv[0]+1; *s; s++) |
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72 | switch (*s) { |
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73 | case 's': |
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74 | scale = atof(*++argv); |
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75 | argc -= 1; |
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76 | break; |
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77 | default: |
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78 | usage (progname); |
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79 | exit (-1); |
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80 | break; |
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81 | } |
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82 | } |
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83 | |
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84 | /* Get the input file name */ |
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85 | if (argc == 0) { |
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86 | /* No input name -- read from stdin */ |
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87 | inFile = stdin; |
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88 | } else if (argc == 1 && argv[0][0] != '-') { |
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89 | /* Open input file */ |
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90 | inName = argv[0]; |
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91 | inFile = fopen(inName, "r"); |
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92 | if (inFile == NULL) { |
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93 | fprintf(stderr, "Error, could not open input ply file: %s\n", inName); |
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94 | usage(progname); |
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95 | exit(-1); |
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96 | } |
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97 | } else { |
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98 | fprintf(stderr, "Unhandled argument: %s\n", argv[0]); |
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99 | usage(progname); |
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100 | exit(-1); |
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101 | } |
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102 | |
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103 | read_file(inFile); |
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104 | |
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105 | write_file(); |
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106 | } |
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107 | |
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108 | |
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109 | /****************************************************************************** |
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110 | Print out usage information. |
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111 | ******************************************************************************/ |
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112 | |
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113 | void |
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114 | usage(char *progname) |
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115 | { |
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116 | fprintf (stderr, "Usage: %s [flags] [in.ply] > out\n", progname); |
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117 | fprintf (stderr, " or: %s [flags] < in.ply > out\n", progname); |
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118 | fprintf (stderr, "Flags:\n"); |
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119 | fprintf (stderr, " -s scale\n"); |
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120 | exit(-1); |
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121 | } |
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122 | |
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123 | |
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124 | /****************************************************************************** |
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125 | Transform the PLY object. |
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126 | ******************************************************************************/ |
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127 | |
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128 | /****************************************************************************** |
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129 | Read in the PLY file from standard in. |
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130 | ******************************************************************************/ |
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131 | |
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132 | void |
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133 | read_file(FILE *inFile) |
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134 | { |
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135 | int i,j,k; |
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136 | PlyFile *ply; |
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137 | int nprops; |
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138 | int num_elems; |
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139 | PlyProperty **plist; |
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140 | char *elem_name; |
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141 | float version; |
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142 | |
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143 | |
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144 | /*** Read in the original PLY object ***/ |
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145 | |
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146 | |
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147 | ply = ply_read (inFile, &nelems, &elist); |
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148 | ply_get_info (ply, &version, &file_type); |
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149 | |
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150 | for (i = 0; i < nelems; i++) { |
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151 | |
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152 | /* get the description of the first element */ |
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153 | elem_name = elist[i]; |
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154 | plist = ply_get_element_description (ply, elem_name, &num_elems, &nprops); |
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155 | |
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156 | if (equal_strings ("vertex", elem_name)) { |
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157 | |
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158 | /* create a vertex list to hold all the vertices */ |
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159 | vlist = (Vertex **) malloc (sizeof (Vertex *) * num_elems); |
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160 | nverts = num_elems; |
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161 | |
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162 | /* set up for getting vertex elements */ |
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163 | |
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164 | ply_get_property (ply, elem_name, &vert_props[0]); |
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165 | ply_get_property (ply, elem_name, &vert_props[1]); |
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166 | ply_get_property (ply, elem_name, &vert_props[2]); |
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167 | vert_other = ply_get_other_properties (ply, elem_name, |
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168 | offsetof(Vertex,other_props)); |
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169 | |
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170 | /* grab all the vertex elements */ |
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171 | for (j = 0; j < num_elems; j++) { |
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172 | vlist[j] = (Vertex *) malloc (sizeof (Vertex)); |
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173 | ply_get_element (ply, (void *) vlist[j]); |
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174 | } |
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175 | } |
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176 | } |
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177 | |
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178 | comments = ply_get_comments (ply, &num_comments); |
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179 | obj_info = ply_get_obj_info (ply, &num_obj_info); |
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180 | |
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181 | ply_close (ply); |
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182 | } |
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183 | |
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184 | |
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185 | /****************************************************************************** |
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186 | Write out the PLY file to standard out. |
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187 | ******************************************************************************/ |
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188 | |
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189 | void |
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190 | write_file() |
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191 | { |
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192 | int i,j,k; |
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193 | |
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194 | for (i = 0; i < nverts; i++) |
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195 | fprintf(stdout, "%d %d %d\n", (int)(scale*vlist[i]->x), |
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196 | (int)(scale*vlist[i]->y), (int)(scale*vlist[i]->z)); |
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197 | } |
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198 | |
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