Function CMod_LoadPatches

code/qcommon/cm_load.cpp:528–583

*/
#define	MAX_PATCH_VERTS		1024
void CMod_LoadPatches( lump_t *surfs, lump_t *verts, clipMap_t &cm ) {
	mapVert_t	*dv, *dv_p;
	dsurface_t	*in;
	int			count;
	int			i, j;
	int			c;
	cPatch_t	*patch;
	vec3_t		points[MAX_PATCH_VERTS];
	int			width, height;
	int			shaderNum;

	in = (dsurface_t *)(cmod_base + surfs->fileofs);
	if (surfs->filelen % sizeof(*in))
		Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");
	cm.numSurfaces = count = surfs->filelen / sizeof(*in);
	cm.surfaces = (cPatch_t **) Z_Malloc( cm.numSurfaces * sizeof( cm.surfaces[0] ), TAG_BSP, qtrue );

	dv = (mapVert_t *)(cmod_base + verts->fileofs);
	if (verts->filelen % sizeof(*dv))
		Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");

	// scan through all the surfaces, but only load patches,
	// not planar faces
	for ( i = 0 ; i < count ; i++, in++ ) {
		if ( LittleLong( in->surfaceType ) != MST_PATCH ) {
			continue;		// ignore other surfaces
		}
		// FIXME: check for non-colliding patches

		cm.surfaces[ i ] = patch = (cPatch_t *) Z_Malloc( sizeof( *patch ), TAG_BSP, qtrue );

		// load the full drawverts onto the stack
		width = LittleLong( in->patchWidth );
		height = LittleLong( in->patchHeight );
		c = width * height;
		if ( c > MAX_PATCH_VERTS ) {
			Com_Error( ERR_DROP, "ParseMesh: MAX_PATCH_VERTS" );
		}

		dv_p = dv + LittleLong( in->firstVert );
		for ( j = 0 ; j < c ; j++, dv_p++ ) {
			points[j][0] = LittleFloat( dv_p->xyz[0] );
			points[j][1] = LittleFloat( dv_p->xyz[1] );
			points[j][2] = LittleFloat( dv_p->xyz[2] );
		}

		shaderNum = LittleLong( in->shaderNum );
		patch->contents = cm.shaders[shaderNum].contentFlags;
		CM_OrOfAllContentsFlagsInMap |= patch->contents;

		patch->surfaceFlags = cm.shaders[shaderNum].surfaceFlags;

		// create the internal facet structure
		patch->pc = CM_GeneratePatchCollide( width, height, points );
	}
}

//==================================================================