C++ LLVertexBuffer::getTexCoord0Strider方法代码示例

void create_vertex_buffers_from_model(LLModel* model, std::vector<LLPointer <LLVertexBuffer> >& vertex_buffers)
{
#if 0 //VECTORIZE THIS ?
	vertex_buffers.clear();
	
	for (S32 i = 0; i < model->getNumVolumeFaces(); ++i)
	{
		const LLVolumeFace &vf = model->getVolumeFace(i);
		U32 num_vertices = vf.mNumVertices;
		U32 num_indices = vf.mNumIndices;

		if (!num_vertices || ! num_indices)
		{
			continue;
		}

		LLVertexBuffer* vb =
			new LLVertexBuffer(LLVertexBuffer::MAP_VERTEX | LLVertexBuffer::MAP_NORMAL | LLVertexBuffer::MAP_TEXCOORD0, 0);
		
		vb->allocateBuffer(num_vertices, num_indices, TRUE);

		LLStrider<LLVector3> vertex_strider;
		LLStrider<LLVector3> normal_strider;
		LLStrider<LLVector2> tc_strider;
		LLStrider<U16> index_strider;

		vb->getVertexStrider(vertex_strider);
		vb->getNormalStrider(normal_strider);
		vb->getTexCoord0Strider(tc_strider);

		vb->getIndexStrider(index_strider);

		// build vertices and normals
		for (U32 i = 0; (S32)i < num_vertices; i++)
		{
			*(vertex_strider++) = vf.mVertices[i].mPosition;
			*(tc_strider++) = vf.mVertices[i].mTexCoord;
			LLVector3 normal = vf.mVertices[i].mNormal;
			normal.normalize();
			*(normal_strider++) = normal;
		}

		// build indices
		for (U32 i = 0; i < num_indices; i++)
		{
			*(index_strider++) = vf.mIndices[i];
		}


		vertex_buffers.push_back(vb);
	}
#endif
}

void LLTerrainPartition::getGeometry(LLSpatialGroup* group)
{
	LLFastTimer ftm(FTM_REBUILD_TERRAIN_VB);

	LLVertexBuffer* buffer = group->mVertexBuffer;

	//get vertex buffer striders
	LLStrider<LLVector3> vertices;
	LLStrider<LLVector3> normals;
	LLStrider<LLVector2> texcoords2;
	LLStrider<LLVector2> texcoords;
	LLStrider<U16> indices;

	llassert_always(buffer->getVertexStrider(vertices));
	llassert_always(buffer->getNormalStrider(normals));
	llassert_always(buffer->getTexCoord0Strider(texcoords));
	llassert_always(buffer->getTexCoord1Strider(texcoords2));
	llassert_always(buffer->getIndexStrider(indices));

	U32 indices_index = 0;
	U32 index_offset = 0;

	for (std::vector<LLFace*>::iterator i = mFaceList.begin(); i != mFaceList.end(); ++i)
	{
		LLFace* facep = *i;

		facep->setIndicesIndex(indices_index);
		facep->setGeomIndex(index_offset);
		facep->setVertexBuffer(buffer);

		LLVOSurfacePatch* patchp = (LLVOSurfacePatch*) facep->getViewerObject();
		patchp->getGeometry(vertices, normals, texcoords, texcoords2, indices);

		indices_index += facep->getIndicesCount();
		index_offset += facep->getGeomCount();
	}

	buffer->flush();
	mFaceList.clear();
}

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 LLVOTree::updateMesh()
{
	LLMatrix4 matrix;
	
	// Translate to tree base  HACK - adjustment in Z plants tree underground
	const LLVector3 &pos_agent = getPositionAgent();
	//gGL.translatef(pos_agent.mV[VX], pos_agent.mV[VY], pos_agent.mV[VZ] - 0.1f);
	LLMatrix4 trans_mat;
	trans_mat.setTranslation(pos_agent.mV[VX], pos_agent.mV[VY], pos_agent.mV[VZ] - 0.1f);
	trans_mat *= matrix;
	
	// Rotate to tree position and bend for current trunk/wind
	// Note that trunk stiffness controls the amount of bend at the trunk as 
	// opposed to the crown of the tree
	// 
	const F32 TRUNK_STIFF = 22.f;
	
	LLQuaternion rot = 
		LLQuaternion(mTrunkBend.magVec()*TRUNK_STIFF*DEG_TO_RAD, LLVector4(mTrunkBend.mV[VX], mTrunkBend.mV[VY], 0)) *
		LLQuaternion(90.f*DEG_TO_RAD, LLVector4(0,0,1)) *
		getRotation();

	LLMatrix4 rot_mat(rot);
	rot_mat *= trans_mat;

	F32 radius = getScale().magVec()*0.05f;
	LLMatrix4 scale_mat;
	scale_mat.mMatrix[0][0] = 
		scale_mat.mMatrix[1][1] =
		scale_mat.mMatrix[2][2] = radius;

	scale_mat *= rot_mat;

//	const F32 THRESH_ANGLE_FOR_BILLBOARD = 15.f;
//	const F32 BLEND_RANGE_FOR_BILLBOARD = 3.f;

	F32 droop = mDroop + 25.f*(1.f - mTrunkBend.magVec());
	
	S32 stop_depth = 0;
	F32 alpha = 1.0;
	

	U32 vert_count = 0;
	U32 index_count = 0;
	
	calcNumVerts(vert_count, index_count, mTrunkLOD, stop_depth, mDepth, mTrunkDepth, mBranches);

	LLFace* facep = mDrawable->getFace(0);
	LLVertexBuffer* buff = new LLVertexBuffer(LLDrawPoolTree::VERTEX_DATA_MASK, GL_STATIC_DRAW_ARB);
	buff->allocateBuffer(vert_count, index_count, TRUE);
	facep->setVertexBuffer(buff);
	
	LLStrider<LLVector3> vertices;
	LLStrider<LLVector3> normals;
	LLStrider<LLVector2> tex_coords;
	LLStrider<U16> indices;
	U16 idx_offset = 0;

	buff->getVertexStrider(vertices);
	buff->getNormalStrider(normals);
	buff->getTexCoord0Strider(tex_coords);
	buff->getIndexStrider(indices);

	genBranchPipeline(vertices, normals, tex_coords, indices, idx_offset, scale_mat, mTrunkLOD, stop_depth, mDepth, mTrunkDepth, 1.0, mTwist, droop, mBranches, alpha);
	
	mReferenceBuffer->flush();
	buff->flush();
}