C++ R_AddDrawSurf函数代码示例

/*
================
EmitSurface
================
*/
void idGuiModel::EmitSurface( guiModelSurface_t *surf, float modelMatrix[16], float modelViewMatrix[16], bool depthHack ) {
	srfTriangles_t	*tri;
	if( surf->numVerts == 0 ) {
		return;		// nothing in the surface
	}
	// copy verts and indexes
	tri = ( srfTriangles_t * )R_ClearedFrameAlloc( sizeof( *tri ) );
	tri->numIndexes = surf->numIndexes;
	tri->numVerts = surf->numVerts;
	tri->indexes = ( glIndex_t * )R_FrameAlloc( tri->numIndexes * sizeof( tri->indexes[0] ) );
	memcpy( tri->indexes, &indexes[surf->firstIndex], tri->numIndexes * sizeof( tri->indexes[0] ) );
	// we might be able to avoid copying these and just let them reference the list vars
	// but some things, like deforms and recursive
	// guis, need to access the verts in cpu space, not just through the vertex range
	tri->verts = ( idDrawVert * )R_FrameAlloc( tri->numVerts * sizeof( tri->verts[0] ) );
	memcpy( tri->verts, &verts[surf->firstVert], tri->numVerts * sizeof( tri->verts[0] ) );
	// move the verts to the vertex cache
	tri->ambientCache = vertexCache.AllocFrameTemp( tri->verts, tri->numVerts * sizeof( tri->verts[0] ) );
	// if we are out of vertex cache, don't create the surface
	if( !tri->ambientCache ) {
		return;
	}
	renderEntity_t renderEntity;
	memset( &renderEntity, 0, sizeof( renderEntity ) );
	memcpy( renderEntity.shaderParms, surf->color, sizeof( surf->color ) );
	viewEntity_t *guiSpace = ( viewEntity_t * )R_ClearedFrameAlloc( sizeof( *guiSpace ) );
	memcpy( guiSpace->modelMatrix, modelMatrix, sizeof( guiSpace->modelMatrix ) );
	memcpy( guiSpace->modelViewMatrix, modelViewMatrix, sizeof( guiSpace->modelViewMatrix ) );
	guiSpace->weaponDepthHack = depthHack;
	// add the surface, which might recursively create another gui
	R_AddDrawSurf( tri, guiSpace, &renderEntity, surf->material, tr.viewDef->scissor );
}

/*
AddDecalSurface()
    adds a decal surface to the scene
*/
void R_AddDecalSurface(decal_t *decal)
{
	int dlightMap;

	srfDecal_t   *srf;
	srfGeneric_t *gen;

	/* early outs */
	if (decal->shader == NULL || decal->parent->viewCount != tr.viewCount || r_firstSceneDecal + tr.refdef.numDecals >= MAX_DECALS)
	{
		return;
	}

	/* get decal surface */
	srf = &tr.refdef.decals[tr.refdef.numDecals];
	tr.refdef.numDecals++;

	/* set it up */
	srf->surfaceType = SF_DECAL;
	srf->numVerts    = decal->numVerts;
	Com_Memcpy(srf->verts, decal->verts, srf->numVerts * sizeof(*srf->verts));

	/* fade colors */
	if (decal->fadeStartTime < tr.refdef.time && decal->fadeStartTime < decal->fadeEndTime)
	{
		int   i;
		float fade = (float) (decal->fadeEndTime - tr.refdef.time) /
		             (float) (decal->fadeEndTime - decal->fadeStartTime);

		for (i = 0; i < decal->numVerts; i++)
		{
			decal->verts[i].modulate[0] *= fade;
			decal->verts[i].modulate[1] *= fade;
			decal->verts[i].modulate[2] *= fade;
			decal->verts[i].modulate[3] *= fade;
		}
	}

	/* dynamic lights? */
	if (decal->parent != NULL)
	{
		gen       = (srfGeneric_t *) decal->parent->data;
		dlightMap = (gen->dlightBits != 0);
	}
	else
	{
		dlightMap = 0;
	}

	/* add surface to scene */
	R_AddDrawSurf((void *) srf, decal->shader, decal->fogIndex, 0, dlightMap);
	tr.pc.c_decalSurfaces++;

	/* free temporary decal */
	if (decal->fadeEndTime <= tr.refdef.time)
	{
		decal->shader = NULL;
	}
}

/*
AddDecalSurface()
adds a decal surface to the scene
*/
void R_AddDecalSurface(decal_t *decal)
{
	int        i;     //, dlightMap;
	float      fade;
	srfDecal_t *srf;
	//srfGeneric_t   *gen;

	// early outs
	if (decal->shader == NULL || decal->parent->viewCount != tr.viewCountNoReset || tr.refdef.numDecals >= MAX_DECALS)
	{
		return;
	}

	// get decal surface
	srf = &tr.refdef.decals[tr.refdef.numDecals];
	tr.refdef.numDecals++;

	// set it up
	srf->surfaceType = SF_DECAL;
	srf->numVerts    = decal->numVerts;
	Com_Memcpy(srf->verts, decal->verts, srf->numVerts * sizeof(*srf->verts));

	// fade colors
	if (decal->fadeStartTime < tr.refdef.time && decal->fadeStartTime < decal->fadeEndTime)
	{
		fade = (float)(decal->fadeEndTime - tr.refdef.time) / (float)(decal->fadeEndTime - decal->fadeStartTime);
		for (i = 0; i < decal->numVerts; i++)
		{
			decal->verts[i].modulate[0] *= fade;
			decal->verts[i].modulate[1] *= fade;
			decal->verts[i].modulate[2] *= fade;
			decal->verts[i].modulate[3] *= fade;
		}
	}

	// dynamic lights?
	/*
	if(decal->parent != NULL)
	{
	    gen = (srfGeneric_t *) decal->parent->data;
	    dlightMap = (gen->dlightBits[tr.smpFrame] != 0);
	}
	else
	{
	    dlightMap = 0;
	}
	*/

	// add surface to scene
	//R_AddDrawSurf((void *)srf, decal->shader, decal->fogIndex, 0, dlightMap);
	R_AddDrawSurf((surfaceType_t *)srf, decal->shader, -1, decal->fogIndex);
	tr.pc.c_decalSurfaces++;

	// free temporary decal
	if (decal->fadeEndTime <= tr.refdef.time)
	{
		decal->shader = NULL;
	}
}

void R_AddPolygonSurfaces()
{
    tr.currentEntityNum = ENTITYNUM_WORLD;
    tr.shiftedEntityNum = tr.currentEntityNum << QSORT_ENTITYNUM_SHIFT;

    const srfPoly_t* poly = tr.refdef.polys;
    for (int i = 0; i < tr.refdef.numPolys; ++i, ++poly) {
        R_AddDrawSurf( (const surfaceType_t*)poly, R_GetShaderByHandle( poly->hShader ), poly->fogIndex );
    }
}

/*
=====================
R_AddPolygonSurfaces

Adds all the scene's polys into this view's drawsurf list
=====================
*/
void R_AddPolygonSurfaces( void ) {
	int			i;
	shader_t	*sh;
	srfPoly_t	*poly;

	tr.currentEntityNum = ENTITYNUM_WORLD;
	tr.shiftedEntityNum = tr.currentEntityNum << QSORT_ENTITYNUM_SHIFT;

	for ( i = 0, poly = tr.refdef.polys; i < tr.refdef.numPolys ; i++, poly++ ) {
		sh = R_GetShaderByHandle( poly->hShader );
		R_AddDrawSurf( ( surfaceType_t * )poly, sh, poly->fogIndex, qfalse ); // ***GREGS_VC9_PORT_MOD*** -- changed typecast; was void *
	}
}

/*
=====================
R_AddPolygonSurfaces

Adds all the scene's polys into this view's drawsurf list
=====================
*/
void R_AddPolygonSurfaces( void ) {
	int			i;
	shader_t	*sh;
	srfPoly_t	*poly;

	tr.currentEntityNum = REFENTITYNUM_WORLD;
	tr.shiftedEntityNum = tr.currentEntityNum << QSORT_REFENTITYNUM_SHIFT;

	for ( i = 0, poly = tr.refdef.polys; i < tr.refdef.numPolys ; i++, poly++ ) {
		sh = R_GetShaderByHandle( poly->hShader );
		R_AddDrawSurf( ( void * )poly, sh, poly->fogIndex, qfalse );
	}
}

/*
=====================
R_AddPolygonSurfaces

Adds all the scene's polys into this view's drawsurf list
=====================
*/
void R_AddPolygonSurfaces( void ) {
	int			i;
	shader_t	*sh;
	srfPoly_t	*poly;

	tr.currentEntityNum = ENTITYNUM_WORLD;
	tr.shiftedEntityNum = tr.currentEntityNum << QSORT_ENTITYNUM_SHIFT;

	for ( i = 0, poly = tr.refdef.polys; i < tr.refdef.numPolys ; i++, poly++ ) {
		sh = R_GetShaderByHandle( poly->hShader );
		R_AddDrawSurf( reinterpret_cast<surfaceType_t*>(poly), sh, poly->fogIndex, false );
	}
}

/*
=====================
R_AddPolygonSurfaces

Adds all the scene's polys into this view's drawsurf list
=====================
*/
void R_AddPolygonBufferSurfaces() {
    int i;
    shader_t* sh;
    srfPolyBuffer_t* polybuffer;

    tr.currentEntity = &tr.worldEntity;

    for (i = 0, polybuffer = tr.refdef.polybuffers; i < tr.refdef.numPolybuffers;
         i++, polybuffer++) {
        sh = R_GetShaderByHandle(polybuffer->pPolyBuffer->shader);

        R_AddDrawSurf((surfaceType_t*) polybuffer, sh, -1, polybuffer->fogIndex);
    }
}

/*
=====================
R_AddPolygonSurfaces

Adds all the scene's polys into this view's drawsurf list
=====================
*/
void R_AddPolygonBufferSurfaces( void ) {
	int i;
	shader_t        *sh;
	srfPolyBuffer_t *polybuffer;

	tr.currentEntityNum = ENTITYNUM_WORLD;
	tr.shiftedEntityNum = tr.currentEntityNum << QSORT_REFENTITYNUM_SHIFT;

	for ( i = 0, polybuffer = tr.refdef.polybuffers; i < tr.refdef.numPolyBuffers ; i++, polybuffer++ ) {
		sh = R_GetShaderByHandle( polybuffer->pPolyBuffer->shader );

		R_AddDrawSurf( ( void * )polybuffer, sh, R_PolyBufferFogNum( polybuffer ), qfalse );
	}
}

/*
=====================
R_AddPolygonSurfaces

Adds all the scene's polys into this view's drawsurf list
=====================
*/
void R_AddPolygonSurfaces( void ) {
	int			i;
	shader_t	*sh;
	srfPoly_t	*poly;
	int		fogMask;

	tr.currentEntityNum = REFENTITYNUM_WORLD;
	tr.shiftedEntityNum = tr.currentEntityNum << QSORT_REFENTITYNUM_SHIFT;
	fogMask = -((tr.refdef.rdflags & RDF_NOFOG) == 0);

	for ( i = 0, poly = tr.refdef.polys; i < tr.refdef.numPolys ; i++, poly++ ) {
		sh = R_GetShaderByHandle( poly->hShader );
		R_AddDrawSurf( ( void * )poly, sh, poly->fogIndex & fogMask, qfalse, qfalse, 0 /*cubeMap*/  );
	}
}

/*
=====================
R_AddPolygonSurfaces

Adds all the scene's polys into this view's drawsurf list
=====================
*/
void R_AddPolygonSurfaces() {
    int i;
    shader_t* sh;
    srfPoly_t* poly;

    if (!r_drawpolies->integer) {
        return;
    }

    tr.currentEntity = &tr.worldEntity;

    for (i = 0, poly = tr.refdef.polys; i < tr.refdef.numPolys; i++, poly++) {
        sh = R_GetShaderByHandle(poly->hShader);
        R_AddDrawSurf((surfaceType_t*) poly, sh, -1, poly->fogIndex);
    }
}

/*
==============
R_AddAnimSurfaces
==============
*/
void R_AddAnimSurfaces( trRefEntity_t *ent ) {
	md4Header_t		*header;
	md4Surface_t	*surface;
	md4LOD_t		*lod;
	shader_t		*shader;
	int				i;

	header = tr.currentModel->md4;
	lod = (md4LOD_t *)( (byte *)header + header->ofsLODs );

	surface = (md4Surface_t *)( (byte *)lod + lod->ofsSurfaces );
	for ( i = 0 ; i < lod->numSurfaces ; i++ ) {
		shader = R_GetShaderByHandle( surface->shaderIndex );
		R_AddDrawSurf( (void *)surface, shader, 0 /*fogNum*/, qfalse );
		surface = (md4Surface_t *)( (byte *)surface + surface->ofsEnd );
	}
}

//	adds a decal surface to the scene
static void R_AddDecalSurface( mbrush46_decal_t* decal ) {
	//	early outs
	if ( decal->shader == NULL || decal->parent->viewCount != tr.viewCount || tr.refdef.numDecals >= MAX_DECALS ) {
		return;
	}

	//	get decal surface
	idSurfaceDecal* srf = &tr.refdef.decals[ tr.refdef.numDecals ];
	tr.refdef.numDecals++;

	//	set it up
	srf->surf.numVerts = decal->numVerts;
	Com_Memcpy( srf->surf.verts, decal->verts, srf->surf.numVerts * sizeof ( *srf->surf.verts ) );

	//	fade colors
	if ( decal->fadeStartTime < tr.refdef.time && decal->fadeStartTime < decal->fadeEndTime ) {
		float fade = ( float )( decal->fadeEndTime - tr.refdef.time ) /
					 ( float )( decal->fadeEndTime - decal->fadeStartTime );
		for ( int i = 0; i < decal->numVerts; i++ ) {
			decal->verts[ i ].modulate[ 0 ] *= fade;
			decal->verts[ i ].modulate[ 1 ] *= fade;
			decal->verts[ i ].modulate[ 2 ] *= fade;
			decal->verts[ i ].modulate[ 3 ] *= fade;
		}
	}

	//	dynamic lights?
	int dlightMap;
	if ( decal->parent != NULL ) {
		dlightMap = decal->parent->dlightBits[ tr.smpFrame ] != 0;
	} else {
		dlightMap = 0;
	}

	//	add surface to scene
	R_AddDrawSurf( srf, decal->shader, decal->fogIndex, dlightMap, 0, 0, 0 );
	tr.pc.c_decalSurfaces++;

	//	free temporary decal
	if ( decal->fadeEndTime <= tr.refdef.time ) {
		decal->shader = NULL;
	}
}

/*
=====================
R_AddPolygonSurfaces

Adds all the scene's polys into this view's drawsurf list
=====================
*/
void R_AddPolygonSurfaces( void ) {
	int			i;
	shader_t	*sh;
	srfPoly_t	*poly;

	tr.currentEntityNum = ENTITYNUM_WORLD;
	tr.shiftedEntityNum = tr.currentEntityNum << QSORT_ENTITYNUM_SHIFT;

	for ( i = 0, poly = tr.refdef.polys; i < tr.refdef.numPolys ; i++, poly++ ) {
		sh = R_GetShaderByHandle( poly->hShader );
//sortSL{
		// a hack to get the SprayLogo-"Level" into the Engine
		// without changing the vm-interface-functions
		if(poly->verts->st[0]>=10.0f)
			poly->lvl = ((int)poly->verts->st[0]/10);
		else
			poly->lvl = 0;
//sortSL}
		R_AddDrawSurf( ( void * )poly, sh, poly->fogIndex, qfalse );
	}
}

//.........这里部分代码省略.........
	// This will write directly into the entity structure, so
	// when the surfaces are rendered, they don't need to be
	// range checked again.
	//
	if ((ent->e.frame >= header->numFrames) 
		|| (ent->e.frame < 0)
		|| (ent->e.oldframe >= header->numFrames)
		|| (ent->e.oldframe < 0) )
	{
		ri->Printf( PRINT_DEVELOPER, "R_MDRAddAnimSurfaces: no such frame %d to %d for '%s'\n",
			   ent->e.oldframe, ent->e.frame, tr.currentModel->name );
		ent->e.frame = 0;
		ent->e.oldframe = 0;
	}

	//
	// cull the entire model if merged bounding box of both frames
	// is outside the view frustum.
	//
	cull = R_MDRCullModel (header, ent);
	if ( cull == CULL_OUT ) {
		return;
	}	

	// figure out the current LOD of the model we're rendering, and set the lod pointer respectively.
	lodnum = R_ComputeLOD(ent);
	// check whether this model has as that many LODs at all. If not, try the closest thing we got.
	if(header->numLODs <= 0)
		return;
	if(header->numLODs <= lodnum)
		lodnum = header->numLODs - 1;

	lod = (mdrLOD_t *)( (byte *)header + header->ofsLODs);
	for(i = 0; i < lodnum; i++)
	{
		lod = (mdrLOD_t *) ((byte *) lod + lod->ofsEnd);
	}
	
	// set up lighting
	if ( !personalModel || r_shadows->integer > 1 )
	{
		R_SetupEntityLighting( &tr.refdef, ent );
	}

	// fogNum?
	fogNum = R_MDRComputeFogNum( header, ent );

	surface = (mdrSurface_t *)( (byte *)lod + lod->ofsSurfaces );

	for ( i = 0 ; i < lod->numSurfaces ; i++ )
	{
		
		if(ent->e.customShader)
			shader = R_GetShaderByHandle(ent->e.customShader);
		else if(ent->e.customSkin > 0 && ent->e.customSkin < tr.numSkins)
		{
			skin = R_GetSkinByHandle(ent->e.customSkin);
			shader = tr.defaultShader;
			
			for(j = 0; j < skin->numSurfaces; j++)
			{
				if (!strcmp(skin->surfaces[j]->name, surface->name))
				{
					shader = skin->surfaces[j]->shader;
					break;
				}
			}
		}
		else if(surface->shaderIndex > 0)
			shader = R_GetShaderByHandle( surface->shaderIndex );
		else
			shader = tr.defaultShader;

		// we will add shadows even if the main object isn't visible in the view

		// stencil shadows can't do personal models unless I polyhedron clip
		if ( !personalModel
		        && r_shadows->integer == 2
			&& fogNum == 0
			&& !(ent->e.renderfx & ( RF_NOSHADOW | RF_DEPTHHACK ) )
			&& shader->sort == SS_OPAQUE )
		{
			R_AddDrawSurf( (void *)surface, tr.shadowShader, 0, qfalse );
		}

		// projection shadows work fine with personal models
		if ( r_shadows->integer == 3
			&& fogNum == 0
			&& (ent->e.renderfx & RF_SHADOW_PLANE )
			&& shader->sort == SS_OPAQUE )
		{
			R_AddDrawSurf( (void *)surface, tr.projectionShadowShader, 0, qfalse );
		}

		if (!personalModel)
			R_AddDrawSurf( (void *)surface, shader, fogNum, qfalse );

		surface = (mdrSurface_t *)( (byte *)surface + surface->ofsEnd );
	}
}