2 Copyright (C) 1999-2006 Id Software, Inc. and contributors.
3 For a list of contributors, see the accompanying CONTRIBUTORS file.
5 This file is part of GtkRadiant.
7 GtkRadiant is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GtkRadiant is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GtkRadiant; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 // trilib.c: library for loading triangles from an Alias triangle file
26 #include "globaldefs.h"
33 // on disk representation of a face
36 #define FLOAT_START 99999.0
37 #define FLOAT_END -FLOAT_START
42 #if GDEF_OS_LINUX || GDEF_OS_MACOS
43 #define strlwr strlower
52 vector n; /* normal */
64 static void ByteSwapTri( tf_triangle *tri ){
67 for ( i = 0 ; i < sizeof( tf_triangle ) / 4 ; i++ )
69 ( (int *)tri )[i] = BigLong( ( (int *)tri )[i] );
73 static void ReadPolysetGeometry( triangle_t *tripool, FILE *input, int count, triangle_t *ptri ){
77 for ( i = 0; i < count; ++i ) {
80 fread( &tri, sizeof( tf_triangle ), 1, input );
82 for ( j = 0 ; j < 3 ; j++ )
86 for ( k = 0 ; k < 3 ; k++ )
88 ptri->verts[j][k] = tri.pt[j].p.v[k];
89 ptri->normals[j][k] = tri.pt[j].n.v[k];
90 // ptri->colors[j][k] = tri.pt[j].c.v[k];
93 ptri->texcoords[j][0] = tri.pt[j].u;
94 ptri->texcoords[j][1] = tri.pt[j].v;
98 if ( ( ptri - tripool ) >= POLYSET_MAXTRIANGLES ) {
99 Error( "Error: too many triangles; increase POLYSET_MAXTRIANGLES\n" );
104 void TRI_LoadPolysets( const char *filename, polyset_t **ppPSET, int *numpsets ){
107 char name[256], tex[256];
108 int i, count, magic, pset = 0;
116 *( (unsigned char *)&exitpattern + 0 ) = *( (unsigned char *)&t + 3 );
117 *( (unsigned char *)&exitpattern + 1 ) = *( (unsigned char *)&t + 2 );
118 *( (unsigned char *)&exitpattern + 2 ) = *( (unsigned char *)&t + 1 );
119 *( (unsigned char *)&exitpattern + 3 ) = *( (unsigned char *)&t + 0 );
121 if ( ( input = fopen( filename, "rb" ) ) == 0 ) {
122 Error( "reader: could not open file '%s'", filename );
127 fread( &magic, sizeof( int ), 1, input );
128 if ( BigLong( magic ) != MAGIC ) {
129 Error( "%s is not a Alias object separated triangle file, magic number is wrong.", filename );
132 pPSET = calloc( 1, POLYSET_MAXPOLYSETS * sizeof( polyset_t ) );
133 ptri = calloc( 1, POLYSET_MAXTRIANGLES * sizeof( triangle_t ) );
137 while ( feof( input ) == 0 ) {
138 if ( fread( &start, sizeof( float ), 1, input ) < 1 ) {
141 *(int *)&start = BigLong( *(int *)&start );
142 if ( *(int *)&start != exitpattern ) {
143 if ( start == FLOAT_START ) {
144 /* Start of an object or group of objects. */
147 /* There are probably better ways to read a string from */
148 /* a file, but this does allow you to do error checking */
149 /* (which I'm not doing) on a per character basis. */
151 fread( &( name[i] ), sizeof( char ), 1, input );
152 } while ( name[i] != '\0' );
155 strncpy( pPSET[pset].name, name, sizeof( pPSET[pset].name ) - 1 );
158 strcpy( pPSET[pset].name, "(unnamed)" );
160 strlwr( pPSET[pset].name );
163 // fprintf(stdout,"OBJECT START: %s\n",name);
164 fread( &count, sizeof( int ), 1, input );
165 count = BigLong( count );
169 // fprintf(stdout,"NUMBER OF TRIANGLES: %d\n",count);
174 fread( &( tex[i] ), sizeof( char ), 1, input );
175 } while ( tex[i] != '\0' );
179 strncpy( pPSET[pset].texname, tex, sizeof( pPSET[pset].texname ) - 1 );
181 strcpy( pPSET[pset].texname, "(unnamed)" );
182 strlwr( pPSET[pset].texname );
186 // fprintf(stdout," Object texture name: '%s'\n",tex);
189 /* Else (count == 0) this is the start of a group, and */
190 /* no texture name is present. */
192 else if ( start == FLOAT_END ) {
193 /* End of an object or group. Yes, the name should be */
194 /* obvious from context, but it is in here just to be */
195 /* safe and to provide a little extra information for */
196 /* those who do not wish to write a recursive reader. */
202 fread( &( name[i] ), sizeof( char ), 1, input );
203 } while ( name[i] != '\0' );
206 strncpy( pPSET[pset].name, name, sizeof( pPSET[pset].name ) - 1 );
209 strcpy( pPSET[pset].name, "(unnamed)" );
212 strlwr( pPSET[pset].name );
215 // fprintf(stdout,"OBJECT END: %s\n",name);
221 // read the triangles
224 pPSET[pset].triangles = ptri;
225 ReadPolysetGeometry( pPSET[0].triangles, input, count, ptri );
227 pPSET[pset].numtriangles = count;
228 if ( ++pset >= POLYSET_MAXPOLYSETS ) {
229 Error( "Error: too many polysets; increase POLYSET_MAXPOLYSETS\n" );