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Optimising the way mesh data is sent to the GPU.

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This commit is contained in:
David Williams 2007-09-30 23:39:48 +00:00
parent d0386f8853
commit 909d020bff
2 changed files with 41 additions and 55 deletions
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3
include/SurfacePatchRenderable.h
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@ -10,6 +10,9 @@
namespace Ogre namespace Ogre
{ {
//IDEA - If profiling identifies this class as a bottleneck, we could implement a memory pooling system.
//All buffers could be powers of two, and we get the smallest one which is big enough for our needs.
//See http://www.ogre3d.org/wiki/index.php/DynamicGrowingBuffers
class SurfacePatchRenderable : public SimpleRenderable class SurfacePatchRenderable : public SimpleRenderable
{ {
public: public:

93
source/SurfacePatchRenderable.cpp
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@ -7,8 +7,25 @@ namespace Ogre
{ {
SurfacePatchRenderable::SurfacePatchRenderable(SurfacePatch& patchToRender, const String& material) SurfacePatchRenderable::SurfacePatchRenderable(SurfacePatch& patchToRender, const String& material)
{ {
//Set up what we can of the vertex data
mRenderOp.vertexData = new VertexData(); mRenderOp.vertexData = new VertexData();
mRenderOp.vertexData->vertexStart = 0;
mRenderOp.vertexData->vertexCount = 0;
mRenderOp.operationType = RenderOperation::OT_TRIANGLE_LIST;
//Set up what we can of the index data
mRenderOp.indexData = new IndexData(); mRenderOp.indexData = new IndexData();
mRenderOp.useIndexes = true;
mRenderOp.indexData->indexStart = 0;
mRenderOp.indexData->indexCount = 0;
//Set up the vertex declaration
VertexDeclaration *decl = mRenderOp.vertexData->vertexDeclaration;
decl->removeAllElements();
decl->addElement(0, 0, VET_FLOAT3, VES_POSITION);
decl->addElement(0, 3 * sizeof(float), VET_FLOAT3, VES_NORMAL);
decl->addElement(0, 6 * sizeof(float), VET_FLOAT1, VES_TEXTURE_COORDINATES);
this->setMaterial(material); this->setMaterial(material);
@ -28,35 +45,23 @@ namespace Ogre
void SurfacePatchRenderable::setGeometry(SurfacePatch& patchToRender) void SurfacePatchRenderable::setGeometry(SurfacePatch& patchToRender)
{ {
//LogManager::getSingleton().logMessage("In setGeometry()");
//Initialization stuff //Initialization stuff
mRenderOp.vertexData->vertexCount = patchToRender.getNoOfVertices(); mRenderOp.vertexData->vertexCount = patchToRender.getNoOfVertices();
mRenderOp.vertexData->vertexStart = 0;
mRenderOp.operationType = RenderOperation::OT_TRIANGLE_LIST; // OT_LINE_LIST, OT_LINE_STRIP
mRenderOp.useIndexes = true;
mRenderOp.indexData->indexStart = 0;
mRenderOp.indexData->indexCount = patchToRender.getNoOfTriangles() * 3; mRenderOp.indexData->indexCount = patchToRender.getNoOfTriangles() * 3;
//LogManager::getSingleton().logMessage("Finished initialisaing stuff");
VertexDeclaration *decl = mRenderOp.vertexData->vertexDeclaration;
VertexBufferBinding *bind = mRenderOp.vertexData->vertexBufferBinding; VertexBufferBinding *bind = mRenderOp.vertexData->vertexBufferBinding;
//FIXME - this should be moved to constructor?
//LogManager::getSingleton().logMessage("Creating Vertex Declaration");
decl->removeAllElements();
decl->addElement(0, 0, VET_FLOAT3, VES_POSITION);
decl->addElement(0, 3 * sizeof(float), VET_FLOAT3, VES_NORMAL);
decl->addElement(0, 6 * sizeof(float), VET_FLOAT1, VES_TEXTURE_COORDINATES);
//LogManager::getSingleton().logMessage("Creating Vertex Buffer"); //LogManager::getSingleton().logMessage("Creating Vertex Buffer");
HardwareVertexBufferSharedPtr vbuf = HardwareVertexBufferSharedPtr vbuf =
HardwareBufferManager::getSingleton().createVertexBuffer( HardwareBufferManager::getSingleton().createVertexBuffer(
decl->getVertexSize(0), mRenderOp.vertexData->vertexDeclaration->getVertexSize(0),
mRenderOp.vertexData->vertexCount, mRenderOp.vertexData->vertexCount,
HardwareBuffer::HBU_STATIC_WRITE_ONLY); HardwareBuffer::HBU_STATIC_WRITE_ONLY,
false);
bind->setBinding(0, vbuf); bind->setBinding(0, vbuf);
@ -68,24 +73,20 @@ namespace Ogre
HardwareBuffer::HBU_STATIC_WRITE_ONLY, // usage HardwareBuffer::HBU_STATIC_WRITE_ONLY, // usage
false); // no shadow buffer false); // no shadow buffer
mRenderOp.indexData->indexBuffer = ibuf; mRenderOp.indexData->indexBuffer = ibuf;
std::vector<SurfaceVertex> vertexData;
vertexData.resize(patchToRender.getNoOfVertices());
std::copy(patchToRender.getVerticesBegin(), patchToRender.getVerticesEnd(), vertexData.begin());
// Drawing stuff // Drawing stuff
//int size = verticesToSet.size(); Vector3 vaabMin = vertexData[0].getPosition().toOgreVector3();
Vector3 vaabMin; Vector3 vaabMax = vertexData[vertexData.size()-1].getPosition().toOgreVector3();
Vector3 vaabMax;
vaabMin.x = patchToRender.getVerticesBegin()->getPosition().x/2.0f;
vaabMin.y = patchToRender.getVerticesBegin()->getPosition().y/2.0f;
vaabMin.z = patchToRender.getVerticesBegin()->getPosition().z/2.0f;
vaabMax.x = patchToRender.getVerticesBegin()->getPosition().x/2.0f;
vaabMax.y = patchToRender.getVerticesBegin()->getPosition().y/2.0f;
vaabMax.z = patchToRender.getVerticesBegin()->getPosition().z/2.0f;
//LogManager::getSingleton().logMessage("Setting Vertex Data of size " + StringConverter::toString(size));
Real *prPos = static_cast<Real*>(vbuf->lock(HardwareBuffer::HBL_DISCARD)); Real *prPos = static_cast<Real*>(vbuf->lock(HardwareBuffer::HBL_DISCARD));
//for(int i = 0; i < size; i++) //for(int i = 0; i < size; i++)
for(SurfaceVertexConstIterator vertexIter = patchToRender.getVerticesBegin(); vertexIter != patchToRender.getVerticesEnd(); ++vertexIter) for(SurfaceVertexConstIterator vertexIter = patchToRender.getVerticesBegin(); vertexIter != patchToRender.getVerticesEnd(); ++vertexIter)
{ {
*prPos++ = vertexIter->getPosition().x/2.0f; *prPos++ = vertexIter->getPosition().x/2.0f;
@ -97,21 +98,7 @@ namespace Ogre
*prPos++ = vertexIter->getNormal().z; *prPos++ = vertexIter->getNormal().z;
*prPos++ = vertexIter->getAlpha(); *prPos++ = vertexIter->getAlpha();
}
if(vertexIter->getPosition().x < vaabMin.x)
vaabMin.x = vertexIter->getPosition().x;
if(vertexIter->getPosition().y < vaabMin.y)
vaabMin.y = vertexIter->getPosition().y;
if(vertexIter->getPosition().z < vaabMin.z)
vaabMin.z = vertexIter->getPosition().z;
if(vertexIter->getPosition().x > vaabMax.x)
vaabMax.x = vertexIter->getPosition().x;
if(vertexIter->getPosition().y > vaabMax.y)
vaabMax.y = vertexIter->getPosition().y;
if(vertexIter->getPosition().z > vaabMax.z)
vaabMax.z = vertexIter->getPosition().z;
}
vbuf->unlock(); vbuf->unlock();
@ -130,11 +117,7 @@ namespace Ogre
*pIdx = indicesToSet[i]; *pIdx = indicesToSet[i];
LogManager::getSingleton().logMessage("Correct pIdx = " + StringConverter::toString(*pIdx)); LogManager::getSingleton().logMessage("Correct pIdx = " + StringConverter::toString(*pIdx));
pIdx++; pIdx++;
}*/ }*/
std::vector<SurfaceVertex> vertexData;
vertexData.resize(patchToRender.getNoOfVertices());
std::copy(patchToRender.getVerticesBegin(), patchToRender.getVerticesEnd(), vertexData.begin());
for(SurfaceTriangleConstIterator iterTriangles = patchToRender.getTrianglesBegin(); iterTriangles != patchToRender.getTrianglesEnd(); ++iterTriangles) for(SurfaceTriangleConstIterator iterTriangles = patchToRender.getTrianglesBegin(); iterTriangles != patchToRender.getTrianglesEnd(); ++iterTriangles)
{ {
@ -142,19 +125,19 @@ namespace Ogre
SurfaceEdgeIterator edgeIter; SurfaceEdgeIterator edgeIter;
edgeIter = iterTriangles->getEdge(); edgeIter = iterTriangles->getEdge();
iterVertex = find(vertexData.begin(), vertexData.end(), *(edgeIter->getTarget())); iterVertex = lower_bound(vertexData.begin(), vertexData.end(), *(edgeIter->getTarget()));
*pIdx = (iterVertex - vertexData.begin()); *pIdx = (iterVertex - vertexData.begin());
//LogManager::getSingleton().logMessage("Wrong pIdx = " + StringConverter::toString(*pIdx)); //LogManager::getSingleton().logMessage("Wrong pIdx = " + StringConverter::toString(*pIdx));
pIdx++; pIdx++;
edgeIter = edgeIter->getNextHalfEdge(); edgeIter = edgeIter->getNextHalfEdge();
iterVertex = find(vertexData.begin(), vertexData.end(), *(edgeIter->getTarget())); iterVertex = lower_bound(vertexData.begin(), vertexData.end(), *(edgeIter->getTarget()));
*pIdx = (iterVertex - vertexData.begin()); *pIdx = (iterVertex - vertexData.begin());
//LogManager::getSingleton().logMessage("Wrong pIdx = " + StringConverter::toString(*pIdx)); //LogManager::getSingleton().logMessage("Wrong pIdx = " + StringConverter::toString(*pIdx));
pIdx++; pIdx++;
edgeIter = edgeIter->getNextHalfEdge(); edgeIter = edgeIter->getNextHalfEdge();
iterVertex = find(vertexData.begin(), vertexData.end(), *(edgeIter->getTarget())); iterVertex = lower_bound(vertexData.begin(), vertexData.end(), *(edgeIter->getTarget()));
*pIdx = (iterVertex - vertexData.begin()); *pIdx = (iterVertex - vertexData.begin());
//LogManager::getSingleton().logMessage("Wrong pIdx = " + StringConverter::toString(*pIdx)); //LogManager::getSingleton().logMessage("Wrong pIdx = " + StringConverter::toString(*pIdx));
pIdx++; pIdx++;