static int DoNextChunk( T3dsLoaderPers *pers, int endofs ){
T3dsChunk *chunk;
#ifdef DEBUG_PM_3DS
printf( "DoNextChunk: endofs %d\n",endofs );
#endif
while ( pers->cofs < endofs )
{
long nextofs = pers->cofs;
if ( ( chunk = GetChunk( pers ) ) == NULL ) {
return 0;
}
if ( !chunk->len ) {
return 0;
}
nextofs += chunk->len;
#ifdef DEBUG_PM_3DS_EX
printf( "Chunk %04x (%s), len %d pers->cofs %x\n",chunk->id,DebugGetChunkName( chunk->id ),chunk->len,pers->cofs );
#endif
/*** version ***/
if ( chunk->id == CHUNK_VERSION ) {
/* at this point i get the 3ds file version. since there */
/* might be new additions to the 3ds file format in 4.0 */
/* it might be a good idea to store the version somewhere */
/* for later handling or message displaying */
/* get the version */
int version;
version = GetWord( pers );
GetWord( pers );
#ifdef DEBUG_PM_3DS
printf( "FileVersion: %d\n",version );
#endif
/* throw out a warning for version 4 models */
if ( version == 4 ) {
_pico_printf( PICO_WARNING,
"3DS version is 4. Model might load incorrectly." );
}
/* store the 3ds file version in pico special field 0 */
/* PicoSetSurfaceSpecial(pers->surface,0,version); */ /* ydnar: this was causing a crash accessing uninitialized surface */
/* rest of chunk is skipped here */
}
/*** editor data ***/
if ( chunk->id == CHUNK_EDITOR_DATA ) {
if ( !DoNextEditorDataChunk( pers,nextofs ) ) {
return 0;
}
continue;
}
/* skip unknown chunk */
pers->cofs = nextofs;
if ( pers->cofs >= pers->maxofs ) {
break;
}
}
return 1;
}
static int DoNextEditorDataChunk (T3dsLoaderPers *pers, long endofs)
{
T3dsChunk *chunk;
#ifdef DEBUG_PM_3DS_EX
printf("DoNextEditorDataChunk: endofs %d\n",endofs);
#endif
while (pers->cofs < endofs)
{
long nextofs = pers->cofs;
if ((chunk = GetChunk(pers)) == NULL) return 0;
if (!chunk->len) return 0;
nextofs += chunk->len;
#ifdef DEBUG_PM_3DS_EX
printf("Chunk %04x (%s), len %d pers->cofs %x\n",chunk->id,DebugGetChunkName(chunk->id),chunk->len,pers->cofs);
#endif
/*** meshes ***/
if (chunk->id == CHUNK_OBJECT)
{
picoSurface_t *surface;
char surfaceName[ 0xff ] = { 0 };
/* read in surface name */
if( !GetASCIIZ(pers,surfaceName,sizeof(surfaceName)) )
return 0; /* this is bad */
//PicoGetSurfaceName
/* ignore NULL name surfaces */
// if( surfaceName
/* allocate a pico surface */
surface = PicoNewSurface( pers->model );
if( surface == NULL )
{
pers->surface = NULL;
return 0; /* this is bad too */
}
/* assign ptr to current surface */
pers->surface = surface;
/* 3ds models surfaces are all triangle meshes */
PicoSetSurfaceType( pers->surface,PICO_TRIANGLES );
/* set surface name */
PicoSetSurfaceName( pers->surface,surfaceName );
/* continue mess with object's sub chunks */
DoNextEditorDataChunk(pers,nextofs);
continue;
}
if (chunk->id == CHUNK_OBJECT_MESH)
{
/* continue mess with mesh's sub chunks */
if (!DoNextEditorDataChunk(pers,nextofs)) return 0;
continue;
}
if (chunk->id == CHUNK_OBJECT_VERTICES)
{
if (!GetMeshVertices(pers)) return 0;
continue;
}
if (chunk->id == CHUNK_OBJECT_FACES)
{
if (!GetMeshFaces(pers)) return 0;
continue;
}
if (chunk->id == CHUNK_OBJECT_UV)
{
if (!GetMeshTexCoords(pers)) return 0;
continue;
}
if (chunk->id == CHUNK_OBJECT_MATERIAL)
{
if (!GetMeshShader(pers)) return 0;
continue;
}
/*** materials ***/
if (chunk->id == CHUNK_MATERIAL)
{
/* new shader specific things should be */
/* initialized right here */
picoShader_t *shader;
/* allocate a pico shader */
shader = PicoNewShader( pers->model ); /* ydnar */
if( shader == NULL )
{
pers->shader = NULL;
return 0; /* this is bad too */
}
/* assign ptr to current shader */
pers->shader = shader;
/* continue and process the material's sub chunks */
DoNextEditorDataChunk(pers,nextofs);
continue;
}
if (chunk->id == CHUNK_MATNAME)
{
/* new material's names should be stored here. note that */
/* GetMeshMaterial returns the name of the material that */
/* is used by the mesh. new material names are set HERE. */
/* but for now we skip the new material's name ... */
if (pers->shader)
{
char *name = (char*) (pers->bufptr + pers->cofs);
char *cleanedName = _pico_clone_alloc( name );
_pico_first_token( cleanedName );
PicoSetShaderName( pers->shader, cleanedName );
#ifdef DEBUG_PM_3DS
printf( "NewShader: '%s'\n", cleanedName );
#endif
_pico_free( cleanedName );
}
}
if (chunk->id == CHUNK_MATDIFFUSE)
{
/* todo: color for last inserted new material should be */
/* stored somewhere by GetDiffuseColor */
if (!GetDiffuseColor(pers)) return 0;
/* rest of chunk is skipped here */
}
if (chunk->id == CHUNK_MATMAP)
{
/* continue and process the material map sub chunks */
DoNextEditorDataChunk(pers,nextofs);
continue;
}
if (chunk->id == CHUNK_MATMAPFILE)
{
/* map file name for last inserted new material should */
/* be stored here. but for now we skip this too ... */
if( pers->shader )
{
char *name = (char *)(pers->bufptr + pers->cofs);
PicoSetShaderMapName( pers->shader,name );
#ifdef DEBUG_PM_3DS
printf("NewShaderMapfile: '%s'\n",name);
#endif
}
}
/*** keyframes ***/
if (chunk->id == CHUNK_KEYFRAME_DATA)
{
/* well umm, this is a bit too much since we don't really */
/* need model animation sequences right now. we skip this */
#ifdef DEBUG_PM_3DS
printf("KeyframeData: len %d\n",chunk->len);
#endif
}
/* skip unknown chunk */
pers->cofs = nextofs;
if (pers->cofs >= pers->maxofs) break;
}
return 1;
}
