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Functions | |
| void | TRI_LoadPolysets (const char *filename, polyset_t **ppPSET, int *numpsets) |
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Definition at line 100 of file trilib.c. References BigLong(), calloc(), count, Error(), fclose(), feof, fopen(), fread(), i, input, name, polyset_t::numtriangles, POLYSET_MAXPOLYSETS, POLYSET_MAXTRIANGLES, ptri, ReadPolysetGeometry(), strcpy(), strlwr(), strncpy(), t, and polyset_t::triangles. 00101 {
00102 FILE *input;
00103 float start;
00104 char name[256], tex[256];
00105 int i, count, magic, pset = 0;
00106 triangle_t *ptri;
00107 polyset_t *pPSET;
00108 int iLevel;
00109 int exitpattern;
00110 float t;
00111
00112 t = -FLOAT_START;
00113 *((unsigned char *)&exitpattern + 0) = *((unsigned char *)&t + 3);
00114 *((unsigned char *)&exitpattern + 1) = *((unsigned char *)&t + 2);
00115 *((unsigned char *)&exitpattern + 2) = *((unsigned char *)&t + 1);
00116 *((unsigned char *)&exitpattern + 3) = *((unsigned char *)&t + 0);
00117
00118 if ((input = fopen(filename, "rb")) == 0)
00119 Error ("reader: could not open file '%s'", filename);
00120
00121 iLevel = 0;
00122
00123 fread(&magic, sizeof(int), 1, input);
00124 if (BigLong(magic) != MAGIC)
00125 Error ("%s is not a Alias object separated triangle file, magic number is wrong.", filename);
00126
00127 pPSET = calloc( 1, POLYSET_MAXPOLYSETS * sizeof( polyset_t ) );
00128 ptri = calloc( 1, POLYSET_MAXTRIANGLES * sizeof( triangle_t ) );
00129
00130 *ppPSET = pPSET;
00131
00132 while (feof(input) == 0) {
00133 if (fread(&start, sizeof(float), 1, input) < 1)
00134 break;
00135 *(int *)&start = BigLong(*(int *)&start);
00136 if (*(int *)&start != exitpattern)
00137 {
00138 if (start == FLOAT_START) {
00139 /* Start of an object or group of objects. */
00140 i = -1;
00141 do {
00142 /* There are probably better ways to read a string from */
00143 /* a file, but this does allow you to do error checking */
00144 /* (which I'm not doing) on a per character basis. */
00145 ++i;
00146 fread( &(name[i]), sizeof( char ), 1, input);
00147 } while( name[i] != '\0' );
00148
00149 if ( i != 0 )
00150 strncpy( pPSET[pset].name, name, sizeof( pPSET[pset].name ) - 1 );
00151 else
00152 strcpy( pPSET[pset].name , "(unnamed)" );
00153 strlwr( pPSET[pset].name );
00154
00155 // indent();
00156 // fprintf(stdout,"OBJECT START: %s\n",name);
00157 fread( &count, sizeof(int), 1, input);
00158 count = BigLong(count);
00159 ++iLevel;
00160 if (count != 0) {
00161 // indent();
00162 // fprintf(stdout,"NUMBER OF TRIANGLES: %d\n",count);
00163
00164 i = -1;
00165 do {
00166 ++i;
00167 fread( &(tex[i]), sizeof( char ), 1, input);
00168 } while( tex[i] != '\0' );
00169
00170 /*
00171 if ( i != 0 )
00172 strncpy( pPSET[pset].texname, tex, sizeof( pPSET[pset].texname ) - 1 );
00173 else
00174 strcpy( pPSET[pset].texname, "(unnamed)" );
00175 strlwr( pPSET[pset].texname );
00176 */
00177
00178 // indent();
00179 // fprintf(stdout," Object texture name: '%s'\n",tex);
00180 }
00181
00182 /* Else (count == 0) this is the start of a group, and */
00183 /* no texture name is present. */
00184 }
00185 else if (start == FLOAT_END) {
00186 /* End of an object or group. Yes, the name should be */
00187 /* obvious from context, but it is in here just to be */
00188 /* safe and to provide a little extra information for */
00189 /* those who do not wish to write a recursive reader. */
00190 /* Mea culpa. */
00191 --iLevel;
00192 i = -1;
00193 do {
00194 ++i;
00195 fread( &(name[i]), sizeof( char ), 1, input);
00196 } while( name[i] != '\0' );
00197
00198 if ( i != 0 )
00199 strncpy( pPSET[pset].name, name, sizeof( pPSET[pset].name ) - 1 );
00200 else
00201 strcpy( pPSET[pset].name , "(unnamed)" );
00202
00203 strlwr( pPSET[pset].name );
00204
00205 // indent();
00206 // fprintf(stdout,"OBJECT END: %s\n",name);
00207 continue;
00208 }
00209 }
00210
00211 //
00212 // read the triangles
00213 //
00214 if ( count > 0 )
00215 {
00216 pPSET[pset].triangles = ptri;
00217 ReadPolysetGeometry( pPSET[0].triangles, input, count, ptri );
00218 ptri += count;
00219 pPSET[pset].numtriangles = count;
00220 if ( ++pset >= POLYSET_MAXPOLYSETS )
00221 {
00222 Error ("Error: too many polysets; increase POLYSET_MAXPOLYSETS\n");
00223 }
00224 }
00225 }
00226
00227 *numpsets = pset;
00228
00229 fclose (input);
00230 }
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1.3.9.1