C++ LLVertexBuffer::setBuffer方法代码示例

void LLDrawPoolTree::render(S32 pass)
{
	LLFastTimer t(LLPipeline::sShadowRender ? FTM_SHADOW_TREE : FTM_RENDER_TREES);

	if (mDrawFace.empty())
	{
		return;
	}

	LLGLEnable test(GL_ALPHA_TEST);
	LLOverrideFaceColor color(this, 1.f, 1.f, 1.f, 1.f);

	if (gSavedSettings.getBOOL("RenderAnimateTrees"))
	{
		renderTree();
	}
	else
	{
		gGL.getTexUnit(sDiffTex)->bind(mTexturep);
					
		for (std::vector<LLFace*>::iterator iter = mDrawFace.begin();
			 iter != mDrawFace.end(); iter++)
		{
			LLFace *face = *iter;
			LLVertexBuffer* buff = face->getVertexBuffer();
			if(buff)
			{
				buff->setBuffer(LLDrawPoolTree::VERTEX_DATA_MASK);
				buff->drawRange(LLRender::TRIANGLES, 0, buff->getRequestedVerts()-1, buff->getRequestedIndices(), 0); 
				gPipeline.addTrianglesDrawn(buff->getRequestedIndices());
			}
		}
	}
}

void LLDrawPoolTree::render(S32 pass)
{
	LLFastTimer t(LLPipeline::sShadowRender ? FTM_SHADOW_TREE : FTM_RENDER_TREES);

	if (mDrawFace.empty())
	{
		return;
	}

	LLGLState test(GL_ALPHA_TEST, LLGLSLShader::sNoFixedFunction ? 0 : 1);
	LLOverrideFaceColor color(this, 1.f, 1.f, 1.f, 1.f);

	gGL.getTexUnit(sDiffTex)->bind(mTexturep);
				
	for (std::vector<LLFace*>::iterator iter = mDrawFace.begin();
		 iter != mDrawFace.end(); iter++)
	{
		LLFace *face = *iter;
		LLVertexBuffer* buff = face->getVertexBuffer();
		if(buff)
		{
			buff->setBuffer(LLDrawPoolTree::VERTEX_DATA_MASK);
			buff->drawRange(LLRender::TRIANGLES, 0, buff->getNumVerts()-1, buff->getNumIndices(), 0); 
			gPipeline.addTrianglesDrawn(buff->getNumIndices());
		}
	}
}

// static
void LLViewerJointMesh::updateGeometryVectorized(LLFace *face, LLPolyMesh *mesh)
{
	static LLV4Matrix4	sJointMat[32];
	LLDynamicArray<LLJointRenderData*>& joint_data = mesh->getReferenceMesh()->mJointRenderData;
	S32 j, joint_num, joint_end = joint_data.count();
	LLV4Vector3 pivot;

	//upload joint pivots/matrices
	for(j = joint_num = 0; joint_num < joint_end ; ++joint_num )
	{
		LLSkinJoint *sj;
		const LLMatrix4 *	wm = joint_data[joint_num]->mWorldMatrix;
		if (NULL == (sj = joint_data[joint_num]->mSkinJoint))
		{
				sj = joint_data[++joint_num]->mSkinJoint;
				((LLV4Matrix3)(sJointMat[j] = *wm)).multiply(sj->mRootToParentJointSkinOffset, pivot);
				sJointMat[j++].translate(pivot);
				wm = joint_data[joint_num]->mWorldMatrix;
		}
		((LLV4Matrix3)(sJointMat[j] = *wm)).multiply(sj->mRootToJointSkinOffset, pivot);
		sJointMat[j++].translate(pivot);
	}

	F32					weight		= F32_MAX;
	LLV4Matrix4			blend_mat;

	LLStrider<LLVector3> o_vertices;
	LLStrider<LLVector3> o_normals;

	LLVertexBuffer *buffer = face->mVertexBuffer;
	buffer->getVertexStrider(o_vertices,  mesh->mFaceVertexOffset);
	buffer->getNormalStrider(o_normals,   mesh->mFaceVertexOffset);

	const F32*			weights			= mesh->getWeights();
	const LLVector3*	coords			= mesh->getCoords();
	const LLVector3*	normals			= mesh->getNormals();
	for (U32 index = 0, index_end = mesh->getNumVertices(); index < index_end; ++index)
	{
		if( weight != weights[index])
		{
			S32 joint = llfloor(weight = weights[index]);
			blend_mat.lerp(sJointMat[joint], sJointMat[joint+1], weight - joint);
		}
		blend_mat.multiply(coords[index], o_vertices[index]);
		((LLV4Matrix3)blend_mat).multiply(normals[index], o_normals[index]);
	}

	buffer->setBuffer(0);
}

void LLDrawPoolTree::render(S32 pass)
{
	LLFastTimer t(LLPipeline::sShadowRender ? FTM_SHADOW_TREE : FTM_RENDER_TREES);

	if (mDrawFace.empty())
	{
		return;
	}

	LLGLState test(GL_ALPHA_TEST, LLGLSLShader::sNoFixedFunction ? 0 : 1);
	LLOverrideFaceColor color(this, 1.f, 1.f, 1.f, 1.f);

	static LLCachedControl<bool> sRenderAnimateTrees("RenderAnimateTrees", false);
	if (sRenderAnimateTrees)
	{
		renderTree();
	}
	else
	gGL.getTexUnit(sDiffTex)->bind(mTexturep);
					
	for (std::vector<LLFace*>::iterator iter = mDrawFace.begin();
			 iter != mDrawFace.end(); iter++)
	{
		LLFace *face = *iter;
		LLVertexBuffer* buff = face->getVertexBuffer();

		if(buff)
		{
			LLMatrix4* model_matrix = &(face->getDrawable()->getRegion()->mRenderMatrix);

			if (model_matrix != gGLLastMatrix)
			{
				gGLLastMatrix = model_matrix;
				gGL.loadMatrix(gGLModelView);
				if (model_matrix)
				{
					llassert(gGL.getMatrixMode() == LLRender::MM_MODELVIEW);
					gGL.multMatrix((GLfloat*) model_matrix->mMatrix);
				}
				gPipeline.mMatrixOpCount++;
			}

			buff->setBuffer(LLDrawPoolTree::VERTEX_DATA_MASK);
			buff->drawRange(LLRender::TRIANGLES, 0, buff->getNumVerts()-1, buff->getNumIndices(), 0); 
			gPipeline.addTrianglesDrawn(buff->getNumIndices());
		}
	}
}

void LLVertexBuffer::clientCopy(F64 max_time)
{
	if (!sDeleteList.empty())
	{
		size_t num = sDeleteList.size();
		glDeleteBuffersARB(sDeleteList.size(), (GLuint*) &(sDeleteList[0]));
		sDeleteList.clear();
		sGLCount -= num;
	}

	if (sEnableVBOs)
	{
		LLTimer timer;
		BOOL reset = TRUE;
		buffer_list_t::iterator iter = sLockedList.begin();
		while(iter != sLockedList.end())
		{
			LLVertexBuffer* buffer = *iter;
			if (buffer->isLocked() && buffer->useVBOs())
			{
				buffer->setBuffer(0);
			}
			++iter;
			if (reset)
			{
				reset = FALSE;
				timer.reset(); //skip first copy (don't count pipeline stall)
			}
			else
			{
				if (timer.getElapsedTimeF64() > max_time)
				{
					break;
				}
			}

		}

		sLockedList.erase(sLockedList.begin(), iter);
	}
}

//.........这里部分代码省略.........
	{
		gGL.getTexUnit(diffuse_channel)->bindManual(LLTexUnit::TT_TEXTURE, mTestImageName);

		if (mIsTransparent)
		{
			gGL.diffuseColor4f(1.f, 1.f, 1.f, 1.f);
		}
		else
		{
			gGL.diffuseColor4f(0.7f, 0.6f, 0.3f, 1.f);
			gGL.getTexUnit(diffuse_channel)->setTextureColorBlend(LLTexUnit::TBO_LERP_TEX_ALPHA, LLTexUnit::TBS_TEX_COLOR, LLTexUnit::TBS_PREV_COLOR);
		}
	}
	else if( !is_dummy && layerset )
	{
		if(	layerset->hasComposite() )
		{
			gGL.getTexUnit(diffuse_channel)->bind(layerset->getViewerComposite());
		}
		else
		{
			// This warning will always trigger if you've hacked the avatar to show as incomplete.
			// Ignore the warning if that's the case.
			static const LLCachedControl<bool> render_unloaded_avatar("RenderUnloadedAvatar", false);
			if (!render_unloaded_avatar)
			{
				llwarns << "Layerset without composite" << llendl;
			}
			gGL.getTexUnit(diffuse_channel)->bind(LLViewerTextureManager::getFetchedTexture(IMG_DEFAULT));
		}
	}
	else
	if ( !is_dummy && mTexture.notNull() )
	{
		if(mTexture->hasGLTexture())
		{
			old_mode = mTexture->getAddressMode();
		}
		gGL.getTexUnit(diffuse_channel)->bind(mTexture);
		gGL.getTexUnit(diffuse_channel)->setTextureAddressMode(LLTexUnit::TAM_CLAMP);
	}
	else
	{
		gGL.getTexUnit(diffuse_channel)->bind(LLViewerTextureManager::getFetchedTexture(IMG_DEFAULT));
	}
	
	
	U32 mask = sRenderMask;

	U32 start = mMesh->mFaceVertexOffset;
	U32 end = start + mMesh->mFaceVertexCount - 1;
	U32 count = mMesh->mFaceIndexCount;
	U32 offset = mMesh->mFaceIndexOffset;

	LLVertexBuffer* buff = mFace->getVertexBuffer();

	if (mMesh->hasWeights())
	{
		if ((mFace->getPool()->getVertexShaderLevel() > 0))
		{
			if (first_pass)
			{
				uploadJointMatrices();
			}
			mask = mask | LLVertexBuffer::MAP_WEIGHT;
			if (mFace->getPool()->getVertexShaderLevel() > 1)
			{
				mask = mask | LLVertexBuffer::MAP_CLOTHWEIGHT;
			}
		}
		
		buff->setBuffer(mask);
		buff->drawRange(LLRender::TRIANGLES, start, end, count, offset);
	}
	else
	{
		gGL.pushMatrix();
		LLMatrix4 jointToWorld = getWorldMatrix();
		gGL.multMatrix((GLfloat*)jointToWorld.mMatrix);
		buff->setBuffer(mask);
		buff->drawRange(LLRender::TRIANGLES, start, end, count, offset);
		gGL.popMatrix();
	}
	gPipeline.addTrianglesDrawn(count);

	triangle_count += count;
	
	if (mTestImageName)
	{
		gGL.getTexUnit(diffuse_channel)->setTextureBlendType(LLTexUnit::TB_MULT);
	}

	if (mTexture.notNull() && !is_dummy)
	{
		gGL.getTexUnit(diffuse_channel)->bind(mTexture);
		gGL.getTexUnit(diffuse_channel)->setTextureAddressMode(old_mode);
	}

	return triangle_count;
}

void LLParticlePartition::getGeometry(LLSpatialGroup* group)
{
	LLMemType mt(LLMemType::MTYPE_SPACE_PARTITION);
	LLFastTimer ftm(mDrawableType == LLPipeline::RENDER_TYPE_GRASS ?
					LLFastTimer::FTM_REBUILD_GRASS_VB :
					LLFastTimer::FTM_REBUILD_PARTICLE_VB);

	std::sort(mFaceList.begin(), mFaceList.end(), LLFace::CompareDistanceGreater());

	U32 index_count = 0;
	U32 vertex_count = 0;

	group->clearDrawMap();

	LLVertexBuffer* buffer = group->mVertexBuffer;

	LLStrider<U16> indicesp;
	LLStrider<LLVector3> verticesp;
	LLStrider<LLVector3> normalsp;
	LLStrider<LLVector2> texcoordsp;
	LLStrider<LLColor4U> colorsp;

	buffer->getVertexStrider(verticesp);
	buffer->getNormalStrider(normalsp);
	buffer->getColorStrider(colorsp);
	buffer->getTexCoord0Strider(texcoordsp);
	buffer->getIndexStrider(indicesp);

	LLSpatialGroup::drawmap_elem_t& draw_vec = group->mDrawMap[mRenderPass];	

	for (std::vector<LLFace*>::iterator i = mFaceList.begin(); i != mFaceList.end(); ++i)
	{
		LLFace* facep = *i;
		LLAlphaObject* object = (LLAlphaObject*) facep->getViewerObject();
		facep->setGeomIndex(vertex_count);
		facep->setIndicesIndex(index_count);
		facep->mVertexBuffer = buffer;
		facep->setPoolType(LLDrawPool::POOL_ALPHA);
		object->getGeometry(facep->getTEOffset(), verticesp, normalsp, texcoordsp, colorsp, indicesp);
		
		vertex_count += facep->getGeomCount();
		index_count += facep->getIndicesCount();

		S32 idx = draw_vec.size()-1;

		BOOL fullbright = facep->isState(LLFace::FULLBRIGHT);
		F32 vsize = facep->getVirtualSize();

		if (idx >= 0 && draw_vec[idx]->mEnd == facep->getGeomIndex()-1 &&
			draw_vec[idx]->mTexture == facep->getTexture() &&
			(U16) (draw_vec[idx]->mEnd - draw_vec[idx]->mStart + facep->getGeomCount()) <= (U32) gGLManager.mGLMaxVertexRange &&
			//draw_vec[idx]->mCount + facep->getIndicesCount() <= (U32) gGLManager.mGLMaxIndexRange &&
			draw_vec[idx]->mEnd - draw_vec[idx]->mStart + facep->getGeomCount() < 4096 &&
			draw_vec[idx]->mFullbright == fullbright)
		{
			draw_vec[idx]->mCount += facep->getIndicesCount();
			draw_vec[idx]->mEnd += facep->getGeomCount();
			draw_vec[idx]->mVSize = llmax(draw_vec[idx]->mVSize, vsize);
		}
		else
		{
			U32 start = facep->getGeomIndex();
			U32 end = start + facep->getGeomCount()-1;
			U32 offset = facep->getIndicesStart();
			U32 count = facep->getIndicesCount();
			LLDrawInfo* info = new LLDrawInfo(start,end,count,offset,facep->getTexture(), buffer, fullbright); 
			info->mExtents[0] = group->mObjectExtents[0];
			info->mExtents[1] = group->mObjectExtents[1];
			info->mVSize = vsize;
			draw_vec.push_back(info);
			//for alpha sorting
			facep->setDrawInfo(info);
		}
	}

	buffer->setBuffer(0);
	mFaceList.clear();
}

void LLDrawPoolAvatar::renderRigged(LLVOAvatar* avatar, U32 type, bool glow)
{
	if (avatar->isSelf() && !gAgent.needsRenderAvatar() || !gMeshRepo.meshRezEnabled())
	{
		return;
	}

	stop_glerror();

	for (U32 i = 0; i < mRiggedFace[type].size(); ++i)
	{
		LLFace* face = mRiggedFace[type][i];
		LLDrawable* drawable = face->getDrawable();
		if (!drawable)
		{
			continue;
		}
		LLVOVolume* vobj = drawable->getVOVolume();

		if (!vobj)
		{
			continue;
		}
	
		LLVolume* volume = vobj->getVolume();
		S32 te = face->getTEOffset();

		if (!volume || volume->getNumVolumeFaces() <= te || !volume->isMeshAssetLoaded())
		{
			continue;
		}

		LLUUID mesh_id = volume->getParams().getSculptID();
		if (mesh_id.isNull())
		{
			continue;
		}

		const LLMeshSkinInfo* skin = gMeshRepo.getSkinInfo(mesh_id, vobj);
		if (!skin)
		{
			continue;
		}

		stop_glerror();

		const LLVolumeFace& vol_face = volume->getVolumeFace(te);
		updateRiggedFaceVertexBuffer(avatar, face, skin, volume, vol_face, vobj);

		stop_glerror();

		U32 data_mask = LLFace::getRiggedDataMask(type);

		LLVertexBuffer* buff = face->getVertexBuffer();

		if (buff)
		{
			if (sShaderLevel > 0)
			{ //upload matrix palette to shader
				LLMatrix4 mat[64];

				for (U32 i = 0; i < skin->mJointNames.size(); ++i)
				{
					LLJoint* joint = avatar->getJoint(skin->mJointNames[i]);
					if (joint)
					{
						mat[i] = skin->mInvBindMatrix[i];
						mat[i] *= joint->getWorldMatrix();
					}
				}

				stop_glerror();

				LLDrawPoolAvatar::sVertexProgram->uniformMatrix4fv("matrixPalette",
																   skin->mJointNames.size(),
																   FALSE,
																   (GLfloat*) mat[0].mMatrix);

				stop_glerror();
			}
			else
			{
				data_mask &= ~LLVertexBuffer::MAP_WEIGHT4;
			}

			buff->setBuffer(data_mask);

			U16 start = face->getGeomStart();
			U16 end = start + face->getGeomCount()-1;
			S32 offset = face->getIndicesStart();
			U32 count = face->getIndicesCount();

			if (glow)
			{
				glColor4f(0,0,0,face->getTextureEntry()->getGlow());
			}

			gGL.getTexUnit(sDiffuseChannel)->bind(face->getTexture());
			if (normal_channel > -1)
			{
//.........这里部分代码省略.........

//.........这里部分代码省略.........
			{
				data_mask &= ~LLVertexBuffer::MAP_WEIGHT4;
			}

			U16 start = face->getGeomStart();
			U16 end = start + face->getGeomCount()-1;
			S32 offset = face->getIndicesStart();
			U32 count = face->getIndicesCount();

			/*if (glow)
			{
				gGL.diffuseColor4f(0,0,0,face->getTextureEntry()->getGlow());
			}*/

			const LLTextureEntry* te = face->getTextureEntry();
			LLMaterial* mat = te->getMaterialParams().get();

			if (mat && is_deferred_render)
			{
				gGL.getTexUnit(sDiffuseChannel)->bind(face->getTexture(LLRender::DIFFUSE_MAP));
				gGL.getTexUnit(normal_channel)->bind(face->getTexture(LLRender::NORMAL_MAP));
				gGL.getTexUnit(specular_channel)->bind(face->getTexture(LLRender::SPECULAR_MAP));

				LLColor4 col = mat->getSpecularLightColor();
				F32 spec = llmax(0.0001f, mat->getSpecularLightExponent() / 255.f);

				F32 env = mat->getEnvironmentIntensity()/255.f;

				if (mat->getSpecularID().isNull())
				{
					env = te->getShiny()*0.25f;
					col.set(env,env,env,0);
					spec = env;
				}
		
				BOOL fullbright = te->getFullbright();

				sVertexProgram->uniform1f(LLShaderMgr::EMISSIVE_BRIGHTNESS, fullbright ? 1.f : 0.f);
				sVertexProgram->uniform4f(LLShaderMgr::SPECULAR_COLOR, col.mV[0], col.mV[1], col.mV[2], spec);
				sVertexProgram->uniform1f(LLShaderMgr::ENVIRONMENT_INTENSITY, env);

				if (mat->getDiffuseAlphaMode() == LLMaterial::DIFFUSE_ALPHA_MODE_MASK)
				{
					sVertexProgram->setMinimumAlpha(mat->getAlphaMaskCutoff()/255.f);
				}
				else
				{
					sVertexProgram->setMinimumAlpha(0.004f);
				}

				for (U32 i = 0; i < LLRender::NUM_TEXTURE_CHANNELS; ++i)
				{
					LLViewerTexture* tex = face->getTexture(i);
					if (tex)
					{
						tex->addTextureStats(avatar->getPixelArea());
					}
				}
			}
			else
			{
				gGL.getTexUnit(sDiffuseChannel)->bind(face->getTexture());

				if(sVertexProgram)
				{
					if (mat && mat->getDiffuseAlphaMode() == LLMaterial::DIFFUSE_ALPHA_MODE_MASK)
					{
						sVertexProgram->setMinimumAlpha(mat->getAlphaMaskCutoff()/255.f);
					}
					else
					{
						sVertexProgram->setMinimumAlpha(0.004f);
					}
				}

				if (normal_channel > -1)
				{
					LLDrawPoolBump::bindBumpMap(face, normal_channel);
				}
			}

			if (face->mTextureMatrix && vobj->mTexAnimMode)
			{
				gGL.matrixMode(LLRender::MM_TEXTURE);
				gGL.loadMatrix(*face->mTextureMatrix);
				buff->setBuffer(data_mask);
				buff->drawRange(LLRender::TRIANGLES, start, end, count, offset);
				gGL.loadIdentity();
				gGL.matrixMode(LLRender::MM_MODELVIEW);
			}
			else
			{
				buff->setBuffer(data_mask);
				buff->drawRange(LLRender::TRIANGLES, start, end, count, offset);		
			}

			gPipeline.addTrianglesDrawn(count, LLRender::TRIANGLES);
		}
	}
}

BOOL LLVOWater::updateGeometry(LLDrawable *drawable)
{
	LLFastTimer ftm(FTM_UPDATE_WATER);
	LLFace *face;

	if (drawable->getNumFaces() < 1)
	{
		LLDrawPoolWater *poolp = (LLDrawPoolWater*) gPipeline.getPool(LLDrawPool::POOL_WATER);
		drawable->addFace(poolp, NULL);
	}
	face = drawable->getFace(0);

//	LLVector2 uvs[4];
//	LLVector3 vtx[4];

	LLStrider<LLVector3> verticesp, normalsp;
	LLStrider<LLVector2> texCoordsp;
	LLStrider<U16> indicesp;
	U16 index_offset;


	// A quad is 4 vertices and 6 indices (making 2 triangles)
	static const unsigned int vertices_per_quad = 4;
	static const unsigned int indices_per_quad = 6;

	const S32 size = gSavedSettings.getBOOL("RenderTransparentWater") ? 16 : 1;

	const S32 num_quads = size * size;
	face->setSize(vertices_per_quad * num_quads,
				  indices_per_quad * num_quads);
	
	LLVertexBuffer* buff = face->getVertexBuffer();
	if (!buff)
	{
		buff = new LLVertexBuffer(LLDrawPoolWater::VERTEX_DATA_MASK, GL_DYNAMIC_DRAW_ARB);
		buff->allocateBuffer(face->getGeomCount(), face->getIndicesCount(), TRUE);
		face->setIndicesIndex(0);
		face->setGeomIndex(0);
		face->setVertexBuffer(buff);
	}
	else
	{
		buff->resizeBuffer(face->getGeomCount(), face->getIndicesCount());
	}
		
	index_offset = face->getGeometry(verticesp,normalsp,texCoordsp, indicesp);
		
	LLVector3 position_agent;
	position_agent = getPositionAgent();
	face->mCenterAgent = position_agent;
	face->mCenterLocal = position_agent;

	S32 x, y;
	F32 step_x = getScale().mV[0] / size;
	F32 step_y = getScale().mV[1] / size;

	const LLVector3 up(0.f, step_y * 0.5f, 0.f);
	const LLVector3 right(step_x * 0.5f, 0.f, 0.f);
	const LLVector3 normal(0.f, 0.f, 1.f);

	F32 size_inv = 1.f / size;

	for (y = 0; y < size; y++)
	{
		for (x = 0; x < size; x++)
		{
			S32 toffset = index_offset + 4*(y*size + x);
			position_agent = getPositionAgent() - getScale() * 0.5f;
			position_agent.mV[VX] += (x + 0.5f) * step_x;
			position_agent.mV[VY] += (y + 0.5f) * step_y;

			*verticesp++  = position_agent - right + up;
			*verticesp++  = position_agent - right - up;
			*verticesp++  = position_agent + right + up;
			*verticesp++  = position_agent + right - up;

			*texCoordsp++ = LLVector2(x*size_inv, (y+1)*size_inv);
			*texCoordsp++ = LLVector2(x*size_inv, y*size_inv);
			*texCoordsp++ = LLVector2((x+1)*size_inv, (y+1)*size_inv);
			*texCoordsp++ = LLVector2((x+1)*size_inv, y*size_inv);
			
			*normalsp++   = normal;
			*normalsp++   = normal;
			*normalsp++   = normal;
			*normalsp++   = normal;

			*indicesp++ = toffset + 0;
			*indicesp++ = toffset + 1;
			*indicesp++ = toffset + 2;

			*indicesp++ = toffset + 1;
			*indicesp++ = toffset + 3;
			*indicesp++ = toffset + 2;
		}
	}
	
	buff->setBuffer(0);

	mDrawable->movePartition();
	LLPipeline::sCompiles++;
//.........这里部分代码省略.........

BOOL LLVOWLSky::updateGeometry(LLDrawable * drawable)
{
	LLFastTimer ftm(LLFastTimer::FTM_GEO_SKY);
	LLStrider<LLVector3>	vertices;
	LLStrider<LLVector2>	texCoords;
	LLStrider<U16>			indices;

#if DOME_SLICES
	{
		mFanVerts = new LLVertexBuffer(LLDrawPoolWLSky::SKY_VERTEX_DATA_MASK, GL_STATIC_DRAW_ARB);
		mFanVerts->allocateBuffer(getFanNumVerts(), getFanNumIndices(), TRUE);

		BOOL success = mFanVerts->getVertexStrider(vertices)
			&& mFanVerts->getTexCoord0Strider(texCoords)
			&& mFanVerts->getIndexStrider(indices);

		if(!success) 
		{
			llerrs << "Failed updating WindLight sky geometry." << llendl;
		}

		buildFanBuffer(vertices, texCoords, indices);

		mFanVerts->setBuffer(0);
	}

	{
		const U32 max_buffer_bytes = gSavedSettings.getS32("RenderMaxVBOSize")*1024;
		const U32 data_mask = LLDrawPoolWLSky::SKY_VERTEX_DATA_MASK;
		const U32 max_verts = max_buffer_bytes / LLVertexBuffer::calcVertexSize(data_mask);

		const U32 total_stacks = getNumStacks();

		const U32 verts_per_stack = getNumSlices();

		// each seg has to have one more row of verts than it has stacks
		// then round down
		const U32 stacks_per_seg = (max_verts - verts_per_stack) / verts_per_stack;

		// round up to a whole number of segments
		const U32 strips_segments = (total_stacks+stacks_per_seg-1) / stacks_per_seg;

		llinfos << "WL Skydome strips in " << strips_segments << " batches." << llendl;

		mStripsVerts.resize(strips_segments, NULL);

		for (U32 i = 0; i < strips_segments ;++i)
		{
			LLVertexBuffer * segment = new LLVertexBuffer(LLDrawPoolWLSky::SKY_VERTEX_DATA_MASK, GL_STATIC_DRAW_ARB);
			mStripsVerts[i] = segment;

			U32 num_stacks_this_seg = stacks_per_seg;
			if ((i == strips_segments - 1) && (total_stacks % stacks_per_seg) != 0)
			{
				// for the last buffer only allocate what we'll use
				num_stacks_this_seg = total_stacks % stacks_per_seg;
			}

			// figure out what range of the sky we're filling
			const U32 begin_stack = i * stacks_per_seg;
			const U32 end_stack = begin_stack + num_stacks_this_seg;
			llassert(end_stack <= total_stacks);

			const U32 num_verts_this_seg = verts_per_stack * (num_stacks_this_seg+1);
			llassert(num_verts_this_seg <= max_verts);

			const U32 num_indices_this_seg = 1+num_stacks_this_seg*(2+2*verts_per_stack);
			llassert(num_indices_this_seg * sizeof(U16) <= max_buffer_bytes);

			segment->allocateBuffer(num_verts_this_seg, num_indices_this_seg, TRUE);

			// lock the buffer
			BOOL success = segment->getVertexStrider(vertices)
				&& segment->getTexCoord0Strider(texCoords)
				&& segment->getIndexStrider(indices);

			if(!success) 
			{
				llerrs << "Failed updating WindLight sky geometry." << llendl;
			}

			// fill it
			buildStripsBuffer(begin_stack, end_stack,  vertices, texCoords, indices);

			// and unlock the buffer
			segment->setBuffer(0);
		}
	}
#else
	mStripsVerts = new LLVertexBuffer(LLDrawPoolWLSky::SKY_VERTEX_DATA_MASK, GL_STATIC_DRAW_ARB);
	
	const F32 RADIUS = LLWLParamManager::sParamMgr->getDomeRadius();

	LLPointer<LLVertexBuffer> temp = new LLVertexBuffer(LLVertexBuffer::MAP_VERTEX, 0);
	temp->allocateBuffer(12, 60, TRUE);

	BOOL success = temp->getVertexStrider(vertices)
		&& temp->getIndexStrider(indices);

	if (success)
//.........这里部分代码省略.........

void LLDrawPoolTree::render(S32 pass)
{
	LLFastTimer t(LLPipeline::sShadowRender ? FTM_SHADOW_TREE : FTM_RENDER_TREES);

	if (mDrawFace.empty())
	{
		return;
	}

	LLGLState test(GL_ALPHA_TEST, LLGLSLShader::sNoFixedFunction ? 0 : 1);
	LLOverrideFaceColor color(this, 1.f, 1.f, 1.f, 1.f);

	gGL.getTexUnit(sDiffTex)->bind(mTexturep);
	
	for (std::vector<LLFace*>::iterator iter = mDrawFace.begin();
			 iter != mDrawFace.end(); iter++)
	{
		LLFace *face = *iter;
		if(face->getViewerObject())
		{
			LLVOTree* pTree = dynamic_cast<LLVOTree*>(face->getViewerObject());
			if(pTree && !pTree->mDrawList.empty() )
			{
				LLMatrix4a* model_matrix = &(face->getDrawable()->getRegion()->mRenderMatrix);

				gGL.loadMatrix(gGLModelView);
				gGL.multMatrix(*model_matrix);
				gPipeline.mMatrixOpCount++;

				for(std::vector<LLPointer<LLDrawInfo> >::iterator iter2 = pTree->mDrawList.begin();
					iter2 != pTree->mDrawList.end(); iter2++)
				{
					LLDrawInfo& params = *iter2->get();
					gGL.pushMatrix();
					gGL.multMatrix(*params.mModelMatrix);
					gPipeline.mMatrixOpCount++;
					params.mVertexBuffer->setBuffer(LLDrawPoolTree::VERTEX_DATA_MASK);
					params.mVertexBuffer->drawRange(params.mDrawMode, params.mStart, params.mEnd, params.mCount, params.mOffset);
					gGL.popMatrix();
				}
				continue;
			}
		}
		LLVertexBuffer* buff = face->getVertexBuffer();

		if(buff)
		{
			LLMatrix4a* model_matrix = &(face->getDrawable()->getRegion()->mRenderMatrix);
			if(model_matrix && model_matrix->isIdentity())
			{
				model_matrix = NULL;
			}
			if (model_matrix != gGLLastMatrix)
			{
				gGLLastMatrix = model_matrix;
				gGL.loadMatrix(gGLModelView);
				if (model_matrix)
				{
					llassert(gGL.getMatrixMode() == LLRender::MM_MODELVIEW);
					gGL.multMatrix(*model_matrix);
				}
				gPipeline.mMatrixOpCount++;
			}

			buff->setBuffer(LLDrawPoolTree::VERTEX_DATA_MASK);
			buff->drawRange(LLRender::TRIANGLES, 0, buff->getNumVerts()-1, buff->getNumIndices(), 0); 
			gPipeline.addTrianglesDrawn(buff->getNumIndices());
		}
	}
}

// static
void LLViewerJointMesh::updateGeometryOriginal(LLFace *mFace, LLPolyMesh *mMesh)
{
	LLStrider<LLVector3> o_vertices;
	LLStrider<LLVector3> o_normals;

	//get vertex and normal striders
	LLVertexBuffer *buffer = mFace->mVertexBuffer;
	buffer->getVertexStrider(o_vertices,  0);
	buffer->getNormalStrider(o_normals,   0);

	F32 last_weight = F32_MAX;
	LLMatrix4 gBlendMat;
	LLMatrix3 gBlendRotMat;

	const F32* weights = mMesh->getWeights();
	const LLVector3* coords = mMesh->getCoords();
	const LLVector3* normals = mMesh->getNormals();
	for (U32 index = 0; index < mMesh->getNumVertices(); index++)
	{
		U32 bidx = index + mMesh->mFaceVertexOffset;
		
		// blend by first matrix
		F32 w = weights[index]; 
		
		// Maybe we don't have to change gBlendMat.
		// Profiles of a single-avatar scene on a Mac show this to be a very
		// common case.  JC
		if (w == last_weight)
		{
			o_vertices[bidx] = coords[index] * gBlendMat;
			o_normals[bidx] = normals[index] * gBlendRotMat;
			continue;
		}
		
		last_weight = w;

		S32 joint = llfloor(w);
		w -= joint;
		
		// No lerp required in this case.
		if (w == 1.0f)
		{
			gBlendMat = gJointMatUnaligned[joint+1];
			o_vertices[bidx] = coords[index] * gBlendMat;
			gBlendRotMat = gJointRotUnaligned[joint+1];
			o_normals[bidx] = normals[index] * gBlendRotMat;
			continue;
		}
		
		// Try to keep all the accesses to the matrix data as close
		// together as possible.  This function is a hot spot on the
		// Mac. JC
		LLMatrix4 &m0 = gJointMatUnaligned[joint+1];
		LLMatrix4 &m1 = gJointMatUnaligned[joint+0];
		
		gBlendMat.mMatrix[VX][VX] = lerp(m1.mMatrix[VX][VX], m0.mMatrix[VX][VX], w);
		gBlendMat.mMatrix[VX][VY] = lerp(m1.mMatrix[VX][VY], m0.mMatrix[VX][VY], w);
		gBlendMat.mMatrix[VX][VZ] = lerp(m1.mMatrix[VX][VZ], m0.mMatrix[VX][VZ], w);

		gBlendMat.mMatrix[VY][VX] = lerp(m1.mMatrix[VY][VX], m0.mMatrix[VY][VX], w);
		gBlendMat.mMatrix[VY][VY] = lerp(m1.mMatrix[VY][VY], m0.mMatrix[VY][VY], w);
		gBlendMat.mMatrix[VY][VZ] = lerp(m1.mMatrix[VY][VZ], m0.mMatrix[VY][VZ], w);

		gBlendMat.mMatrix[VZ][VX] = lerp(m1.mMatrix[VZ][VX], m0.mMatrix[VZ][VX], w);
		gBlendMat.mMatrix[VZ][VY] = lerp(m1.mMatrix[VZ][VY], m0.mMatrix[VZ][VY], w);
		gBlendMat.mMatrix[VZ][VZ] = lerp(m1.mMatrix[VZ][VZ], m0.mMatrix[VZ][VZ], w);

		gBlendMat.mMatrix[VW][VX] = lerp(m1.mMatrix[VW][VX], m0.mMatrix[VW][VX], w);
		gBlendMat.mMatrix[VW][VY] = lerp(m1.mMatrix[VW][VY], m0.mMatrix[VW][VY], w);
		gBlendMat.mMatrix[VW][VZ] = lerp(m1.mMatrix[VW][VZ], m0.mMatrix[VW][VZ], w);

		o_vertices[bidx] = coords[index] * gBlendMat;
		
		LLMatrix3 &n0 = gJointRotUnaligned[joint+1];
		LLMatrix3 &n1 = gJointRotUnaligned[joint+0];
		
		gBlendRotMat.mMatrix[VX][VX] = lerp(n1.mMatrix[VX][VX], n0.mMatrix[VX][VX], w);
		gBlendRotMat.mMatrix[VX][VY] = lerp(n1.mMatrix[VX][VY], n0.mMatrix[VX][VY], w);
		gBlendRotMat.mMatrix[VX][VZ] = lerp(n1.mMatrix[VX][VZ], n0.mMatrix[VX][VZ], w);

		gBlendRotMat.mMatrix[VY][VX] = lerp(n1.mMatrix[VY][VX], n0.mMatrix[VY][VX], w);
		gBlendRotMat.mMatrix[VY][VY] = lerp(n1.mMatrix[VY][VY], n0.mMatrix[VY][VY], w);
		gBlendRotMat.mMatrix[VY][VZ] = lerp(n1.mMatrix[VY][VZ], n0.mMatrix[VY][VZ], w);

		gBlendRotMat.mMatrix[VZ][VX] = lerp(n1.mMatrix[VZ][VX], n0.mMatrix[VZ][VX], w);
		gBlendRotMat.mMatrix[VZ][VY] = lerp(n1.mMatrix[VZ][VY], n0.mMatrix[VZ][VY], w);
		gBlendRotMat.mMatrix[VZ][VZ] = lerp(n1.mMatrix[VZ][VZ], n0.mMatrix[VZ][VZ], w);
		
		o_normals[bidx] = normals[index] * gBlendRotMat;
	}

	buffer->setBuffer(0);
}