1 /* -----------------------------------------------------------------------------
5 Copyright (c) 2002, Randy Reddig & seaw0lf
8 Redistribution and use in source and binary forms, with or without modification,
9 are permitted provided that the following conditions are met:
11 Redistributions of source code must retain the above copyright notice, this list
12 of conditions and the following disclaimer.
14 Redistributions in binary form must reproduce the above copyright notice, this
15 list of conditions and the following disclaimer in the documentation and/or
16 other materials provided with the distribution.
18 Neither the names of the copyright holders nor the names of its contributors may
19 be used to endorse or promote products derived from this software without
20 specific prior written permission.
22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
23 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
26 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
29 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 ----------------------------------------------------------------------------- */
43 #include "picointernal.h"
47 /* md3 model format */
48 #define MD3_MAGIC "IDP3"
49 #define MD3_VERSION 15
51 /* md3 vertex scale */
52 #define MD3_SCALE ( 1.0f / 64.0f )
54 /* md3 model frame information */
55 typedef struct md3Frame_s
57 float bounds[ 2 ][ 3 ];
58 float localOrigin[ 3 ];
64 /* md3 model tag information */
65 typedef struct md3Tag_s
73 /* md3 surface md3 (one object mesh) */
74 typedef struct md3Surface_s
77 char name[ 64 ]; /* polyset name */
79 int numFrames; /* all model surfaces should have the same */
80 int numShaders; /* all model surfaces should have the same */
84 int ofsShaders; /* offset from start of md3Surface_t */
85 int ofsSt; /* texture coords are common for all frames */
86 int ofsVertexes; /* numVerts * numFrames */
87 int ofsEnd; /* next surface follows */
91 typedef struct md3Shader_s
94 int shaderIndex; /* for ingame use */
98 typedef struct md3Triangle_s
104 typedef struct md3TexCoord_s
110 typedef struct md3Vertex_s
118 /* md3 model file md3 structure */
121 char magic[ 4 ]; /* MD3_MAGIC */
123 char name[ 64 ]; /* model name */
128 int numSkins; /* number of skins for the mesh */
129 int ofsFrames; /* offset for first frame */
130 int ofsTags; /* numFrames * numTags */
131 int ofsSurfaces; /* first surface, others follow */
132 int ofsEnd; /* end of file */
141 validates a quake3 arena md3 model file. btw, i use the
142 preceding underscore cause it's a static func referenced
143 by one structure only.
146 static int _md3_canload( PM_PARAMS_CANLOAD ){
150 /* to keep the compiler happy */
151 *fileName = *fileName;
154 if ( bufSize < ( sizeof( *md3 ) * 2 ) ) {
155 return PICO_PMV_ERROR_SIZE;
159 md3 = (md3_t*) buffer;
161 /* check md3 magic */
162 if ( *( (int*) md3->magic ) != *( (int*) MD3_MAGIC ) ) {
163 return PICO_PMV_ERROR_IDENT;
166 /* check md3 version */
167 if ( _pico_little_long( md3->version ) != MD3_VERSION ) {
168 return PICO_PMV_ERROR_VERSION;
171 /* file seems to be a valid md3 */
179 loads a quake3 arena md3 model file.
182 static picoModel_t *_md3_load( PM_PARAMS_LOAD ){
186 md3Surface_t *surface;
188 md3TexCoord_t *texCoord;
190 md3Triangle_t *triangle;
194 picoModel_t *picoModel;
195 picoSurface_t *picoSurface;
196 picoShader_t *picoShader;
197 picoVec3_t xyz, normal;
202 /* -------------------------------------------------
204 ------------------------------------------------- */
208 bb = (picoByte_t*) buffer;
209 md3 = (md3_t*) buffer;
211 /* check ident and version */
212 if ( *( (int*) md3->magic ) != *( (int*) MD3_MAGIC ) || _pico_little_long( md3->version ) != MD3_VERSION ) {
213 /* not an md3 file (todo: set error) */
217 /* swap md3; sea: swaps fixed */
218 md3->version = _pico_little_long( md3->version );
219 md3->numFrames = _pico_little_long( md3->numFrames );
220 md3->numTags = _pico_little_long( md3->numTags );
221 md3->numSurfaces = _pico_little_long( md3->numSurfaces );
222 md3->numSkins = _pico_little_long( md3->numSkins );
223 md3->ofsFrames = _pico_little_long( md3->ofsFrames );
224 md3->ofsTags = _pico_little_long( md3->ofsTags );
225 md3->ofsSurfaces = _pico_little_long( md3->ofsSurfaces );
226 md3->ofsEnd = _pico_little_long( md3->ofsEnd );
229 if ( md3->numFrames < 1 ) {
230 _pico_printf( PICO_ERROR, "MD3 with 0 frames" );
234 if ( frameNum < 0 || frameNum >= md3->numFrames ) {
235 _pico_printf( PICO_ERROR, "Invalid or out-of-range MD3 frame specified" );
240 frame = (md3Frame_t*) ( bb + md3->ofsFrames );
241 for ( i = 0; i < md3->numFrames; i++, frame++ )
243 frame->radius = _pico_little_float( frame->radius );
244 for ( j = 0; j < 3; j++ )
246 frame->bounds[ 0 ][ j ] = _pico_little_float( frame->bounds[ 0 ][ j ] );
247 frame->bounds[ 1 ][ j ] = _pico_little_float( frame->bounds[ 1 ][ j ] );
248 frame->localOrigin[ j ] = _pico_little_float( frame->localOrigin[ j ] );
253 surface = (md3Surface_t*) ( bb + md3->ofsSurfaces );
254 for ( i = 0; i < md3->numSurfaces; i++ )
256 /* swap surface md3; sea: swaps fixed */
257 surface->flags = _pico_little_long( surface->flags );
258 surface->numFrames = _pico_little_long( surface->numFrames );
259 surface->numShaders = _pico_little_long( surface->numShaders );
260 surface->numTriangles = _pico_little_long( surface->numTriangles );
261 surface->ofsTriangles = _pico_little_long( surface->ofsTriangles );
262 surface->numVerts = _pico_little_long( surface->numVerts );
263 surface->ofsShaders = _pico_little_long( surface->ofsShaders );
264 surface->ofsSt = _pico_little_long( surface->ofsSt );
265 surface->ofsVertexes = _pico_little_long( surface->ofsVertexes );
266 surface->ofsEnd = _pico_little_long( surface->ofsEnd );
269 triangle = (md3Triangle_t*) ( (picoByte_t*) surface + surface->ofsTriangles );
270 for ( j = 0; j < surface->numTriangles; j++, triangle++ )
272 /* sea: swaps fixed */
273 triangle->indexes[ 0 ] = _pico_little_long( triangle->indexes[ 0 ] );
274 triangle->indexes[ 1 ] = _pico_little_long( triangle->indexes[ 1 ] );
275 triangle->indexes[ 2 ] = _pico_little_long( triangle->indexes[ 2 ] );
279 texCoord = (md3TexCoord_t*) ( (picoByte_t*) surface + surface->ofsSt );
280 for ( j = 0; j < surface->numVerts; j++, texCoord++ )
282 texCoord->st[ 0 ] = _pico_little_float( texCoord->st[ 0 ] );
283 texCoord->st[ 1 ] = _pico_little_float( texCoord->st[ 1 ] );
286 /* swap xyz/normals */
287 vertex = (md3Vertex_t*) ( (picoByte_t*) surface + surface->ofsVertexes );
288 for ( j = 0; j < ( surface->numVerts * surface->numFrames ); j++, vertex++ )
290 vertex->xyz[ 0 ] = _pico_little_short( vertex->xyz[ 0 ] );
291 vertex->xyz[ 1 ] = _pico_little_short( vertex->xyz[ 1 ] );
292 vertex->xyz[ 2 ] = _pico_little_short( vertex->xyz[ 2 ] );
293 vertex->normal = _pico_little_short( vertex->normal );
296 /* get next surface */
297 surface = (md3Surface_t*) ( (picoByte_t*) surface + surface->ofsEnd );
300 /* -------------------------------------------------
302 ------------------------------------------------- */
304 /* create new pico model */
305 picoModel = PicoNewModel();
306 if ( picoModel == NULL ) {
307 _pico_printf( PICO_ERROR, "Unable to allocate a new model" );
312 PicoSetModelFrameNum( picoModel, frameNum );
313 PicoSetModelNumFrames( picoModel, md3->numFrames ); /* sea */
314 PicoSetModelName( picoModel, fileName );
315 PicoSetModelFileName( picoModel, fileName );
317 /* md3 surfaces become picomodel surfaces */
318 surface = (md3Surface_t*) ( bb + md3->ofsSurfaces );
320 /* run through md3 surfaces */
321 for ( i = 0; i < md3->numSurfaces; i++ )
323 /* allocate new pico surface */
324 picoSurface = PicoNewSurface( picoModel );
325 if ( picoSurface == NULL ) {
326 _pico_printf( PICO_ERROR, "Unable to allocate a new model surface" );
327 PicoFreeModel( picoModel ); /* sea */
331 /* md3 model surfaces are all triangle meshes */
332 PicoSetSurfaceType( picoSurface, PICO_TRIANGLES );
334 /* set surface name */
335 PicoSetSurfaceName( picoSurface, surface->name );
337 /* create new pico shader -sea */
338 picoShader = PicoNewShader( picoModel );
339 if ( picoShader == NULL ) {
340 _pico_printf( PICO_ERROR, "Unable to allocate a new model shader" );
341 PicoFreeModel( picoModel );
345 /* detox and set shader name */
346 shader = (md3Shader_t*) ( (picoByte_t*) surface + surface->ofsShaders );
347 _pico_setfext( shader->name, "" );
348 _pico_unixify( shader->name );
349 PicoSetShaderName( picoShader, shader->name );
351 /* associate current surface with newly created shader */
352 PicoSetSurfaceShader( picoSurface, picoShader );
355 triangle = (md3Triangle_t *) ( (picoByte_t*) surface + surface->ofsTriangles );
357 for ( j = 0; j < surface->numTriangles; j++, triangle++ )
359 PicoSetSurfaceIndex( picoSurface, ( j * 3 + 0 ), (picoIndex_t) triangle->indexes[ 0 ] );
360 PicoSetSurfaceIndex( picoSurface, ( j * 3 + 1 ), (picoIndex_t) triangle->indexes[ 1 ] );
361 PicoSetSurfaceIndex( picoSurface, ( j * 3 + 2 ), (picoIndex_t) triangle->indexes[ 2 ] );
365 texCoord = (md3TexCoord_t*) ( (picoByte_t *) surface + surface->ofsSt );
366 vertex = (md3Vertex_t*) ( (picoByte_t*) surface + surface->ofsVertexes + surface->numVerts * frameNum * sizeof( md3Vertex_t ) );
367 _pico_set_color( color, 255, 255, 255, 255 );
369 for ( j = 0; j < surface->numVerts; j++, texCoord++, vertex++ )
371 /* set vertex origin */
372 xyz[ 0 ] = MD3_SCALE * vertex->xyz[ 0 ];
373 xyz[ 1 ] = MD3_SCALE * vertex->xyz[ 1 ];
374 xyz[ 2 ] = MD3_SCALE * vertex->xyz[ 2 ];
375 PicoSetSurfaceXYZ( picoSurface, j, xyz );
377 /* decode lat/lng normal to 3 float normal */
378 lat = (float) ( ( vertex->normal >> 8 ) & 0xff );
379 lng = (float) ( vertex->normal & 0xff );
380 lat *= PICO_PI / 128;
381 lng *= PICO_PI / 128;
382 normal[ 0 ] = (picoVec_t) cos( lat ) * (picoVec_t) sin( lng );
383 normal[ 1 ] = (picoVec_t) sin( lat ) * (picoVec_t) sin( lng );
384 normal[ 2 ] = (picoVec_t) cos( lng );
385 PicoSetSurfaceNormal( picoSurface, j, normal );
388 st[ 0 ] = texCoord->st[ 0 ];
389 st[ 1 ] = texCoord->st[ 1 ];
390 PicoSetSurfaceST( picoSurface, 0, j, st );
393 PicoSetSurfaceColor( picoSurface, 0, j, color );
396 /* get next surface */
397 surface = (md3Surface_t*) ( (picoByte_t*) surface + surface->ofsEnd );
400 /* return the new pico model */
406 /* pico file format module definition */
407 const picoModule_t picoModuleMD3 =
409 "1.3", /* module version string */
410 "Quake 3 Arena", /* module display name */
411 "Randy Reddig", /* author's name */
412 "2002 Randy Reddig", /* module copyright */
414 "md3", NULL, NULL, NULL /* default extensions to use */
416 _md3_canload, /* validation routine */
417 _md3_load, /* load routine */
418 NULL, /* save validation routine */
419 NULL /* save routine */