C++ RB_BeginSurface函数代码示例

/*
** RB_DrawSun
*/
void RB_DrawSun( float scale, shader_t *shader ) {
    float		size;
    float		dist;
    vec3_t		origin, vec1, vec2;
    byte		sunColor[4] = { 255, 255, 255, 255 };

    if ( !backEnd.skyRenderedThisView ) {
        return;
    }

    qglLoadMatrixf( backEnd.viewParms.world.modelMatrix );
    qglTranslatef (backEnd.viewParms.or.origin[0], backEnd.viewParms.or.origin[1], backEnd.viewParms.or.origin[2]);

    dist = 	backEnd.viewParms.zFar / 1.75;		// div sqrt(3)
    size = dist * scale;

    VectorScale( tr.sunDirection, dist, origin );
    PerpendicularVector( vec1, tr.sunDirection );
    CrossProduct( tr.sunDirection, vec1, vec2 );

    VectorScale( vec1, size, vec1 );
    VectorScale( vec2, size, vec2 );

    // farthest depth range
    qglDepthRange( 1.0, 1.0 );

    RB_BeginSurface( shader, 0 );

    RB_AddQuadStamp(origin, vec1, vec2, sunColor);

    RB_EndSurface();

    // back to normal depth range
    qglDepthRange( 0.0, 1.0 );
}

/*
=============
RB_StretchPic
=============
*/
static void RB_StretchPic ( const void *data ) {
	const stretchPicCommand_t	*cmd;
	shader_t *shader;
	int *indexes;
	vec2_t *texCoords;
	vecSimd_t *xyz;
	color4ub_t *colors;

	cmd = (const stretchPicCommand_t *)data;

	if ( !backEnd.projection2D ) {
		RB_SetGL2D();
	}

	shader = cmd->shader;
	if ( shader != tess.shader ) {
		RB_EndSurface();
		RB_BeginSurface( shader, 0 );
	}

	RB_CheckOverflow( 4, 6 );

	indexes = tess.indexes + tess.numIndexes;
	indexes[0] = tess.numVertexes + 3;
	indexes[1] = tess.numVertexes + 0;
	indexes[2] = tess.numVertexes + 2;
	indexes[3] = tess.numVertexes + 2;
	indexes[4] = tess.numVertexes + 0;
	indexes[5] = tess.numVertexes + 1;

	colors = tess.colors + tess.numVertexes;
	Byte4Copy( backEnd.color2D, colors[0] );
	Byte4Copy( backEnd.color2D, colors[1] );
	Byte4Copy( backEnd.color2D, colors[2] );
	Byte4Copy( backEnd.color2D, colors[3] );

	xyz = tess.xyz + tess.numVertexes;
	VectorSet( xyz[0], cmd->x, cmd->y, 0 );
	VectorSet( xyz[1], cmd->x + cmd->w, cmd->y, 0 );
	VectorSet( xyz[2], cmd->x + cmd->w, cmd->y + cmd->h, 0 );
	VectorSet( xyz[3], cmd->x, cmd->y + cmd->h, 0 );

	texCoords = tess.texCoords + tess.numVertexes;

	texCoords[0][0] = cmd->s1;
	texCoords[0][1] = cmd->t1;
	texCoords[1][0] = cmd->s2;
	texCoords[1][1] = cmd->t1;
	texCoords[2][0] = cmd->s2;
	texCoords[2][1] = cmd->t2;
	texCoords[3][0] = cmd->s1;
	texCoords[3][1] = cmd->t2;

	tess.numVertexes += 4;
	tess.numIndexes += 6;

}

const void     *RB_Draw2dPolys( const void *data )
{
	const poly2dCommand_t *cmd;
	shader_t              *shader;
	int                   i;

	cmd = ( const poly2dCommand_t * ) data;

	if ( !backEnd.projection2D )
	{
		RB_SetGL2D();
	}

	shader = cmd->shader;

	if ( shader != tess.shader )
	{
		if ( tess.numIndexes )
		{
			RB_EndSurface();
		}

		backEnd.currentEntity = &backEnd.entity2D;
		RB_BeginSurface( shader, 0 );
	}

	RB_CHECKOVERFLOW( cmd->numverts, ( cmd->numverts - 2 ) * 3 );

	for ( i = 0; i < cmd->numverts - 2; i++ )
	{
		tess.indexes[ tess.numIndexes + 0 ] = tess.numVertexes;
		tess.indexes[ tess.numIndexes + 1 ] = tess.numVertexes + i + 1;
		tess.indexes[ tess.numIndexes + 2 ] = tess.numVertexes + i + 2;
		tess.numIndexes += 3;
	}

	for ( i = 0; i < cmd->numverts; i++ )
	{
		tess.xyz[ tess.numVertexes ].v[ 0 ] = cmd->verts[ i ].xyz[ 0 ];
		tess.xyz[ tess.numVertexes ].v[ 1 ] = cmd->verts[ i ].xyz[ 1 ];
		tess.xyz[ tess.numVertexes ].v[ 2 ] = 0;

		tess.texCoords0[ tess.numVertexes ].v[ 0 ] = cmd->verts[ i ].st[ 0 ];
		tess.texCoords0[ tess.numVertexes ].v[ 1 ] = cmd->verts[ i ].st[ 1 ];

		tess.vertexColors[ tess.numVertexes ].v[ 0 ] = cmd->verts[ i ].modulate[ 0 ];
		tess.vertexColors[ tess.numVertexes ].v[ 1 ] = cmd->verts[ i ].modulate[ 1 ];
		tess.vertexColors[ tess.numVertexes ].v[ 2 ] = cmd->verts[ i ].modulate[ 2 ];
		tess.vertexColors[ tess.numVertexes ].v[ 3 ] = cmd->verts[ i ].modulate[ 3 ];
		tess.numVertexes++;
	}

	return ( const void * )( cmd + 1 );
}

void RB_CheckVao(vao_t *vao)
{
	if (vao != glState.currentVao)
	{
		RB_EndSurface();
		RB_BeginSurface(tess.shader, tess.fogNum, tess.cubemapIndex);

		R_BindVao(vao);
	}

	if (vao != tess.vao)
		tess.useInternalVao = qfalse;
}

void RB_CheckVao(vao_t *vao)
{
	if (vao != glState.currentVao || tess.multiDrawPrimitives >= MAX_MULTIDRAW_PRIMITIVES)
	{
		RB_EndSurface();
		RB_BeginSurface(tess.shader, tess.fogNum, tess.cubemapIndex);

		R_BindVao(vao);
	}

	if (vao != tess.vao)
		tess.useInternalVao = qfalse;
}

/*
==============
RB_CheckOverflow
==============
*/
void RB_CheckOverflow( int verts, int indexes ) {
	if (tess.numVertexes + verts < SHADER_MAX_VERTEXES
		&& tess.numIndexes + indexes < SHADER_MAX_INDEXES) {
		return;
	}

	RB_EndSurface();

	if ( verts >= SHADER_MAX_VERTEXES ) {
		ri.Error(ERR_DROP, "RB_CheckOverflow: verts > MAX (%d > %d)", verts, SHADER_MAX_VERTEXES );
	}
	if ( indexes >= SHADER_MAX_INDEXES ) {
		ri.Error(ERR_DROP, "RB_CheckOverflow: indices > MAX (%d > %d)", indexes, SHADER_MAX_INDEXES );
	}

	RB_BeginSurface(tess.shader, tess.fogNum, tess.cubemapIndex );
}

void RB_CheckOverflow( int verts, int indexes ) {
	if (tess.numVertexes + verts < ACTUAL_SHADER_MAX_VERTEXES
		&& tess.numIndexes + indexes < ACTUAL_SHADER_MAX_INDEXES) {
		return;
	}

	RB_EndSurface();

	if ( verts >= ACTUAL_SHADER_MAX_VERTEXES ) {
		ri.Error(ERR_DROP, "RB_CheckOverflow: verts > MAX (%d > %d)", verts, ACTUAL_SHADER_MAX_VERTEXES );
	}
	if ( indexes >= ACTUAL_SHADER_MAX_INDEXES ) {
		ri.Error(ERR_DROP, "RB_CheckOverflow: indices > MAX (%d > %d)", indexes, ACTUAL_SHADER_MAX_INDEXES );
	}

	RB_BeginSurface(NULL/*MODVIEWREM tess.shader*/, 0/*MODVIEWREM tess.fogNum*/, tess.gluiTextureBind );
}

static qboolean RB_SurfaceVaoCached(int numVerts, srfVert_t *verts, int numIndexes, glIndex_t *indexes, int dlightBits, int pshadowBits)
{
	qboolean recycleVertexBuffer = qfalse;
	qboolean recycleIndexBuffer = qfalse;
	qboolean endSurface = qfalse;

	if (!(!ShaderRequiresCPUDeforms(tess.shader) && !tess.shader->isSky && !tess.shader->isPortal))
		return qfalse;

	if (!numIndexes || !numVerts)
		return qfalse;

	VaoCache_BindVao();

	tess.dlightBits |= dlightBits;
	tess.pshadowBits |= pshadowBits;

	VaoCache_CheckAdd(&endSurface, &recycleVertexBuffer, &recycleIndexBuffer, numVerts, numIndexes);

	if (endSurface)
	{
		RB_EndSurface();
		RB_BeginSurface(tess.shader, tess.fogNum, tess.cubemapIndex);
	}

	if (recycleVertexBuffer)
		VaoCache_RecycleVertexBuffer();

	if (recycleIndexBuffer)
		VaoCache_RecycleIndexBuffer();

	if (!tess.numVertexes)
		VaoCache_InitQueue();

	VaoCache_AddSurface(verts, numVerts, indexes, numIndexes);

	tess.numIndexes += numIndexes;
	tess.numVertexes += numVerts;
	tess.useInternalVao = qfalse;
	tess.useCacheVao = qtrue;

	return qtrue;
}

/*
** RB_DrawSun
*/
void RB_DrawSun( float scale, shader_t *shader ) {
	float		size;
	float		dist;
	vec3_t		origin, vec1, vec2;

	if ( !backEnd.skyRenderedThisView ) {
		return;
	}

	//qglLoadMatrixf( backEnd.viewParms.world.modelMatrix );
	//qglTranslatef (backEnd.viewParms.or.origin[0], backEnd.viewParms.or.origin[1], backEnd.viewParms.or.origin[2]);
	{
		// FIXME: this could be a lot cleaner
		mat4_t translation, modelview;

		Mat4Translation( backEnd.viewParms.or.origin, translation );
		Mat4Multiply( backEnd.viewParms.world.modelMatrix, translation, modelview );
		GL_SetModelviewMatrix( modelview );
	}

	dist = 	backEnd.viewParms.zFar / 1.75;		// div sqrt(3)
	size = dist * scale;

	VectorScale( tr.sunDirection, dist, origin );
	PerpendicularVector( vec1, tr.sunDirection );
	CrossProduct( tr.sunDirection, vec1, vec2 );

	VectorScale( vec1, size, vec1 );
	VectorScale( vec2, size, vec2 );

	// farthest depth range
	qglDepthRange( 1.0, 1.0 );

	RB_BeginSurface( shader, 0, 0 );

	RB_AddQuadStamp(origin, vec1, vec2, colorWhite);

	RB_EndSurface();

	// back to normal depth range
	qglDepthRange( 0.0, 1.0 );
}

const void	*RB_WorldEffects( const void *data ) 
{
	const setModeCommand_t	*cmd;

	cmd = (const setModeCommand_t *)data;

	// Always flush the tess buffer
	if ( tess.shader && tess.numIndexes ) 
	{
		RB_EndSurface();
	}
	RB_RenderWorldEffects();

	if(tess.shader)
	{
		RB_BeginSurface( tess.shader, tess.fogNum );
	}

	return (const void *)(cmd + 1);
}

/*
==================
RB_RenderFlare
==================
*/
void RB_RenderFlare( flare_t *f ) {
	float			size;
	vec3_t			color;
	int				iColor[3];

	backEnd.pc.c_flareRenders++;

	VectorScale( f->color, f->drawIntensity*tr.identityLight, color );
	iColor[0] = color[0] * 255;
	iColor[1] = color[1] * 255;
	iColor[2] = color[2] * 255;

	size = f->lightScale * backEnd.viewParms.viewportWidth * ( r_flareSize->value/640.0 + 8 / -f->eyeZ );

	RB_BeginSurface( tr.flareShader, f->fogNum );

	// FIXME: use quadstamp?
	tess.xyz[tess.numVertexes][0] = f->windowX - size;
	tess.xyz[tess.numVertexes][1] = f->windowY - size;
	tess.texCoords[tess.numVertexes][0][0] = 0;
	tess.texCoords[tess.numVertexes][0][1] = 0;
	tess.vertexColors[tess.numVertexes][0] = iColor[0];
	tess.vertexColors[tess.numVertexes][1] = iColor[1];
	tess.vertexColors[tess.numVertexes][2] = iColor[2];
	tess.vertexColors[tess.numVertexes][3] = 255;
	tess.numVertexes++;

	tess.xyz[tess.numVertexes][0] = f->windowX - size;
	tess.xyz[tess.numVertexes][1] = f->windowY + size;
	tess.texCoords[tess.numVertexes][0][0] = 0;
	tess.texCoords[tess.numVertexes][0][1] = 1;
	tess.vertexColors[tess.numVertexes][0] = iColor[0];
	tess.vertexColors[tess.numVertexes][1] = iColor[1];
	tess.vertexColors[tess.numVertexes][2] = iColor[2];
	tess.vertexColors[tess.numVertexes][3] = 255;
	tess.numVertexes++;

	tess.xyz[tess.numVertexes][0] = f->windowX + size;
	tess.xyz[tess.numVertexes][1] = f->windowY + size;
	tess.texCoords[tess.numVertexes][0][0] = 1;
	tess.texCoords[tess.numVertexes][0][1] = 1;
	tess.vertexColors[tess.numVertexes][0] = iColor[0];
	tess.vertexColors[tess.numVertexes][1] = iColor[1];
	tess.vertexColors[tess.numVertexes][2] = iColor[2];
	tess.vertexColors[tess.numVertexes][3] = 255;
	tess.numVertexes++;

	tess.xyz[tess.numVertexes][0] = f->windowX + size;
	tess.xyz[tess.numVertexes][1] = f->windowY - size;
	tess.texCoords[tess.numVertexes][0][0] = 1;
	tess.texCoords[tess.numVertexes][0][1] = 0;
	tess.vertexColors[tess.numVertexes][0] = iColor[0];
	tess.vertexColors[tess.numVertexes][1] = iColor[1];
	tess.vertexColors[tess.numVertexes][2] = iColor[2];
	tess.vertexColors[tess.numVertexes][3] = 255;
	tess.numVertexes++;

	tess.indexes[tess.numIndexes++] = 0;
	tess.indexes[tess.numIndexes++] = 1;
	tess.indexes[tess.numIndexes++] = 2;
	tess.indexes[tess.numIndexes++] = 0;
	tess.indexes[tess.numIndexes++] = 2;
	tess.indexes[tess.numIndexes++] = 3;

	RB_EndSurface();
}

/*
==================
RB_RenderDrawSurfList
==================
*/
void RB_RenderDrawSurfList( drawSurf_t *drawSurfs, int numDrawSurfs ) {
	shader_t        *shader, *oldShader;
	int fogNum, oldFogNum;
	int entityNum, oldEntityNum;
	int dlighted, oldDlighted;
	qboolean depthRange, oldDepthRange;
	int i;
	drawSurf_t      *drawSurf;
	int oldSort;
	float originalTime;
	int oldNumVerts, oldNumIndex;
//GR - tessellation flag
	int atiTess = 0, oldAtiTess;
#ifdef __MACOS__
	int macEventTime;

	Sys_PumpEvents();       // crutch up the mac's limited buffer queue size

	// we don't want to pump the event loop too often and waste time, so
	// we are going to check every shader change
	macEventTime = ri.Milliseconds() + MAC_EVENT_PUMP_MSEC;
#endif

	// save original time for entity shader offsets
	originalTime = backEnd.refdef.floatTime;

	// clear the z buffer, set the modelview, etc
	RB_BeginDrawingView();

	// draw everything
	oldEntityNum = -1;
	backEnd.currentEntity = &tr.worldEntity;
	oldShader = NULL;
	oldFogNum = -1;
	oldDepthRange = qfalse;
	oldDlighted = qfalse;
	oldSort = -1;
	depthRange = qfalse;
// GR - tessellation also forces to draw everything
	oldAtiTess = -1;

	backEnd.pc.c_surfaces += numDrawSurfs;

	for ( i = 0, drawSurf = drawSurfs ; i < numDrawSurfs ; i++, drawSurf++ ) {
		if ( drawSurf->sort == oldSort ) {
			// fast path, same as previous sort
			oldNumVerts = tess.numVertexes;
			oldNumIndex = tess.numIndexes;

			rb_surfaceTable[ *drawSurf->surface ]( drawSurf->surface );
/*
			// RF, convert the newly created vertexes into dust particles, and overwrite
			if (backEnd.currentEntity->e.reFlags & REFLAG_ZOMBIEFX) {
				RB_ZombieFX( 0, drawSurf, oldNumVerts, oldNumIndex );
			}
			else if (backEnd.currentEntity->e.reFlags & REFLAG_ZOMBIEFX2) {
				RB_ZombieFX( 1, drawSurf, oldNumVerts, oldNumIndex );
			}
*/
			continue;
		}
		oldSort = drawSurf->sort;
// GR - also extract tesselation flag
		R_DecomposeSort( drawSurf->sort, &entityNum, &shader, &fogNum, &dlighted, &atiTess );

		//
		// change the tess parameters if needed
		// a "entityMergable" shader is a shader that can have surfaces from seperate
		// entities merged into a single batch, like smoke and blood puff sprites
		if ( shader != oldShader || fogNum != oldFogNum || dlighted != oldDlighted
// GR - force draw on tessellation flag change
			 || ( atiTess != oldAtiTess )
			 || ( entityNum != oldEntityNum && !shader->entityMergable ) ) {
			if ( oldShader != NULL ) {
#ifdef __MACOS__    // crutch up the mac's limited buffer queue size
				int t;

				t = ri.Milliseconds();
				if ( t > macEventTime ) {
					macEventTime = t + MAC_EVENT_PUMP_MSEC;
					Sys_PumpEvents();
				}
#endif
// GR - pass tessellation flag to the shader command
//		make sure to use oldAtiTess!!!
				tess.ATI_tess = ( oldAtiTess == ATI_TESS_TRUFORM );

				RB_EndSurface();
			}
			RB_BeginSurface( shader, fogNum );
			oldShader = shader;
			oldFogNum = fogNum;
			oldDlighted = dlighted;
// GR - update old tessellation flag
			oldAtiTess = atiTess;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
				shader = oldShader;
				entityNum = oldEntityNum;
				fogNum = oldFogNum;
				dlighted = oldDlighted;

				oldSort = (unsigned int)-1; //invalidate this thing, cause we may want to postrender more surfs of the same sort

				//continue without bothering to begin a draw surf
				continue;
			}
		}

		if (shader != oldShader || fogNum != oldFogNum || dlighted != oldDlighted 
			|| ( entityNum != oldEntityNum && !shader->entityMergable ) )
		{
			if (oldShader != NULL) {
#ifdef __MACOS__	// crutch up the mac's limited buffer queue size
				int		t;

				t = ri.Milliseconds();
				if ( t > macEventTime ) {
					macEventTime = t + MAC_EVENT_PUMP_MSEC;
					Sys_PumpEvents();
				}
#endif
				RB_EndSurface();

				if (!didShadowPass && shader && shader->sort > SS_BANNER)
				{
					RB_ShadowFinish();
					didShadowPass = true;
				}
			}
			RB_BeginSurface( shader, fogNum );
			oldShader = shader;
			oldFogNum = fogNum;
			oldDlighted = dlighted;
		}

		//
		// change the modelview matrix if needed
		//
		if ( entityNum != oldEntityNum ) {
			depthRange = qfalse;

			if ( entityNum != TR_WORLDENT ) {
				backEnd.currentEntity = &backEnd.refdef.entities[entityNum];
				backEnd.refdef.floatTime = originalTime - backEnd.currentEntity->e.shaderTime;

				// set up the transformation matrix
				R_RotateForEntity( backEnd.currentEntity, &backEnd.viewParms, &backEnd.ori );

				// set up the dynamic lighting if needed
				if ( backEnd.currentEntity->needDlights ) {
#ifdef VV_LIGHTING
					VVLightMan.R_TransformDlights( &backEnd.ori );
#else
					R_TransformDlights( backEnd.refdef.num_dlights, backEnd.refdef.dlights, &backEnd.ori );
#endif
				}

				if ( backEnd.currentEntity->e.renderfx & RF_NODEPTH ) {
					// No depth at all, very rare but some things for seeing through walls
					depthRange = 2;
				}
				else if ( backEnd.currentEntity->e.renderfx & RF_DEPTHHACK ) {

/*
==================
RB_RenderFlare
==================
*/
void RB_RenderFlare( flare_t *f ) {
	float			size;
	vec3_t			color;
	int				iColor[3];
	float distance, intensity, factor;
	byte fogFactors[3] = {255, 255, 255};

	backEnd.pc.c_flareRenders++;

	// We don't want too big values anyways when dividing by distance.
	if(f->eyeZ > -1.0f)
		distance = 1.0f;
	else
		distance = -f->eyeZ;

	// calculate the flare size..
	size = backEnd.viewParms.viewportWidth * ( r_flareSize->value/640.0f + 8 / distance );

/*
 * This is an alternative to intensity scaling. It changes the size of the flare on screen instead
 * with growing distance. See in the description at the top why this is not the way to go.
	// size will change ~ 1/r.
	size = backEnd.viewParms.viewportWidth * (r_flareSize->value / (distance * -2.0f));
*/

/*
 * As flare sizes stay nearly constant with increasing distance we must decrease the intensity
 * to achieve a reasonable visual result. The intensity is ~ (size^2 / distance^2) which can be
 * got by considering the ratio of
 * (flaresurface on screen) : (Surface of sphere defined by flare origin and distance from flare)
 * An important requirement is:
 * intensity <= 1 for all distances.
 *
 * The formula used here to compute the intensity is as follows:
 * intensity = flareCoeff * size^2 / (distance + size*sqrt(flareCoeff))^2
 * As you can see, the intensity will have a max. of 1 when the distance is 0.
 * The coefficient flareCoeff will determine the falloff speed with increasing distance.
 */

	factor = distance + size * sqrt(flareCoeff);
	
	intensity = flareCoeff * size * size / (factor * factor);

	VectorScale(f->color, f->drawIntensity * intensity, color);

// Calculations for fogging
	if(tr.world && f->fogNum < tr.world->numfogs)
	{
		tess.numVertexes = 1;
		VectorCopy(f->origin, tess.xyz[0]);
		tess.fogNum = f->fogNum;
	
		RB_CalcModulateColorsByFog(fogFactors);
		
		// We don't need to render the flare if colors are 0 anyways.
		if(!(fogFactors[0] || fogFactors[1] || fogFactors[2]))
			return;
	}

	iColor[0] = color[0] * fogFactors[0];
	iColor[1] = color[1] * fogFactors[1];
	iColor[2] = color[2] * fogFactors[2];
	
	RB_BeginSurface( tr.flareShader, f->fogNum );

	// FIXME: use quadstamp?
	tess.xyz[tess.numVertexes][0] = f->windowX - size;
	tess.xyz[tess.numVertexes][1] = f->windowY - size;
	tess.texCoords[tess.numVertexes][0][0] = 0;
	tess.texCoords[tess.numVertexes][0][1] = 0;
	tess.vertexColors[tess.numVertexes][0] = iColor[0];
	tess.vertexColors[tess.numVertexes][1] = iColor[1];
	tess.vertexColors[tess.numVertexes][2] = iColor[2];
	tess.vertexColors[tess.numVertexes][3] = 255;
	tess.numVertexes++;

	tess.xyz[tess.numVertexes][0] = f->windowX - size;
	tess.xyz[tess.numVertexes][1] = f->windowY + size;
	tess.texCoords[tess.numVertexes][0][0] = 0;
	tess.texCoords[tess.numVertexes][0][1] = 1;
	tess.vertexColors[tess.numVertexes][0] = iColor[0];
	tess.vertexColors[tess.numVertexes][1] = iColor[1];
	tess.vertexColors[tess.numVertexes][2] = iColor[2];
	tess.vertexColors[tess.numVertexes][3] = 255;
	tess.numVertexes++;

	tess.xyz[tess.numVertexes][0] = f->windowX + size;
	tess.xyz[tess.numVertexes][1] = f->windowY + size;
	tess.texCoords[tess.numVertexes][0][0] = 1;
	tess.texCoords[tess.numVertexes][0][1] = 1;
	tess.vertexColors[tess.numVertexes][0] = iColor[0];
	tess.vertexColors[tess.numVertexes][1] = iColor[1];
	tess.vertexColors[tess.numVertexes][2] = iColor[2];
	tess.vertexColors[tess.numVertexes][3] = 255;
	tess.numVertexes++;
//.........这里部分代码省略.........

/**
 * @brief RB_RenderDrawSurfList
 * @param[in] drawSurfs
 * @param[in] numDrawSurfs
 */
void RB_RenderDrawSurfList(drawSurf_t *drawSurfs, int numDrawSurfs)
{
	shader_t   *shader, *oldShader;
	int        fogNum, oldFogNum;
	int        entityNum, oldEntityNum;
	int        frontFace;
	int        dlighted, oldDlighted;
	qboolean   depthRange, oldDepthRange;
	int        i;
	drawSurf_t *drawSurf;
	int        oldSort;
	double     originalTime = backEnd.refdef.floatTime; // save original time for entity shader offsets

	// clear the z buffer, set the modelview, etc
	RB_BeginDrawingView();

	// draw everything
	oldEntityNum          = -1;
	backEnd.currentEntity = &tr.worldEntity;
	oldShader             = NULL;
	oldFogNum             = -1;
	oldDepthRange         = qfalse;
	oldDlighted           = qfalse;
	oldSort               = -1;
	depthRange            = qfalse;

	backEnd.pc.c_surfaces += numDrawSurfs;

	for (i = 0, drawSurf = drawSurfs ; i < numDrawSurfs ; i++, drawSurf++)
	{
		if (drawSurf->sort == oldSort)
		{
			// fast path, same as previous sort
			rb_surfaceTable[*drawSurf->surface] (drawSurf->surface);
			continue;
		}
		oldSort = drawSurf->sort;
		R_DecomposeSort(drawSurf->sort, &entityNum, &shader, &fogNum, &frontFace, &dlighted);

		// change the tess parameters if needed
		// a "entityMergable" shader is a shader that can have surfaces from seperate
		// entities merged into a single batch, like smoke and blood puff sprites
		if (shader && (shader != oldShader || fogNum != oldFogNum || dlighted != oldDlighted
		               || (entityNum != oldEntityNum && !shader->entityMergable)))
		{
			if (oldShader != NULL)
			{
				RB_EndSurface();
			}
			RB_BeginSurface(shader, fogNum);
			oldShader   = shader;
			oldFogNum   = fogNum;
			oldDlighted = dlighted;
		}

		// change the modelview matrix if needed
		if (entityNum != oldEntityNum)
		{
			depthRange = qfalse;

			if (entityNum != ENTITYNUM_WORLD)
			{
				backEnd.currentEntity = &backEnd.refdef.entities[entityNum];

				// FIXME: e.shaderTime must be passed as int to avoid fp-precision loss issues
				backEnd.refdef.floatTime = originalTime; // - backEnd.currentEntity->e.shaderTime; // JPW NERVE pulled this to match q3ta

				// we have to reset the shaderTime as well otherwise image animations start
				// from the wrong frame
				// tess.shaderTime = backEnd.refdef.floatTime - tess.shader->timeOffset;

				// set up the transformation matrix
				R_RotateForEntity(backEnd.currentEntity, &backEnd.viewParms, &backEnd.orientation);

				// set up the dynamic lighting if needed
				if (backEnd.currentEntity->needDlights)
				{
					R_TransformDlights(backEnd.refdef.num_dlights, backEnd.refdef.dlights, &backEnd.orientation);
				}

				if (backEnd.currentEntity->e.renderfx & RF_DEPTHHACK)
				{
					// hack the depth range to prevent view model from poking into walls
					depthRange = qtrue;
				}
			}
			else
			{
				backEnd.currentEntity    = &tr.worldEntity;
				backEnd.refdef.floatTime = originalTime;
				backEnd.orientation      = backEnd.viewParms.world;

				// we have to reset the shaderTime as well otherwise image animations on
				// the world (like water) continue with the wrong frame
				// tess.shaderTime = backEnd.refdef.floatTime - tess.shader->timeOffset;
//.........这里部分代码省略.........