//-----------------------------------------------------------------------
void BaseInstanceBatchVTF::createVertexTexture( const SubMesh* baseSubMesh )
{
/*
TODO: Find a way to retrieve max texture resolution,
http://www.ogre3d.org/forums/viewtopic.php?t=38305
Currently assuming it's 4096x4096, which is a safe bet for any hardware with decent VTF*/
size_t uniqueAnimations = mInstancesPerBatch;
if (useBoneMatrixLookup())
{
uniqueAnimations = std::min<size_t>(getMaxLookupTableInstances(), uniqueAnimations);
}
mMatricesPerInstance = std::max<size_t>( 1, baseSubMesh->blendIndexToBoneIndexMap.size() );
if(mUseBoneDualQuaternions && !mTempTransformsArray3x4)
{
mTempTransformsArray3x4 = OGRE_ALLOC_T(float, mMatricesPerInstance * 3 * 4, MEMCATEGORY_GENERAL);
}
//-----------------------------------------------------------------------
size_t InstanceBatchHW_VTF::calculateMaxNumInstances(
const SubMesh *baseSubMesh, uint16 flags ) const
{
size_t retVal = 0;
RenderSystem *renderSystem = Root::getSingleton().getRenderSystem();
const RenderSystemCapabilities *capabilities = renderSystem->getCapabilities();
//VTF & HW Instancing must be supported
if( capabilities->hasCapability( RSC_VERTEX_BUFFER_INSTANCE_DATA ) &&
capabilities->hasCapability( RSC_VERTEX_TEXTURE_FETCH ) )
{
//TODO: Check PF_FLOAT32_RGBA is supported (should be, since it was the 1st one)
const size_t numBones = std::max<size_t>( 1, baseSubMesh->blendIndexToBoneIndexMap.size() );
const size_t maxUsableWidth = c_maxTexWidthHW - (c_maxTexWidthHW % (numBones * mRowLength));
//See InstanceBatchHW::calculateMaxNumInstances for the 65535
retVal = std::min<size_t>( 65535, maxUsableWidth * c_maxTexHeightHW / mRowLength / numBones );
if( flags & IM_VTFBESTFIT )
{
size_t numUsedSkeletons = mInstancesPerBatch;
if (flags & IM_VTFBONEMATRIXLOOKUP)
numUsedSkeletons = std::min<size_t>(getMaxLookupTableInstances(), numUsedSkeletons);
const size_t instancesPerBatch = std::min( retVal, numUsedSkeletons );
//Do the same as in createVertexTexture(), but changing c_maxTexWidthHW for maxUsableWidth
const size_t numWorldMatrices = instancesPerBatch * numBones;
size_t texWidth = std::min<size_t>( numWorldMatrices * mRowLength, maxUsableWidth );
size_t texHeight = numWorldMatrices * mRowLength / maxUsableWidth;
const size_t remainder = (numWorldMatrices * mRowLength) % maxUsableWidth;
if( remainder && texHeight > 0 )
retVal = static_cast<size_t>(texWidth * texHeight / (float)mRowLength / (float)(numBones));
}
}
return retVal;
}
//-----------------------------------------------------------------------
size_t InstanceBatchHW_VTF::updateVertexTexture( Camera *camera, const Camera *lodCamera )
{
MovableObjectArray *visibleObjects = 0;
if( mManager->getInstancingThreadedCullingMethod() == INSTANCING_CULLING_SINGLETHREAD )
{
//Perform the culling now
ObjectData objData;
const size_t numObjs = mLocalObjectMemoryManager.getFirstObjectData( objData, 0 );
visibleObjects = &mManager->_getTmpVisibleObjectsList()[0][mRenderQueueID];
visibleObjects->clear();
//TODO: Static batches aren't yet supported (camera ptr will be null and crash)
MovableObject::cullFrustum( numObjs, objData, camera,
camera->getLastViewport()->getVisibilityMask()&mManager->getVisibilityMask(),
*visibleObjects, lodCamera );
}
else
{
//Get the results from the time the threaded version ran.
visibleObjects = &mCulledInstances;
}
bool useMatrixLookup = useBoneMatrixLookup();
if (useMatrixLookup)
{
//if we are using bone matrix look up we have to update the instance buffer for the
//vertex texture to be relevant
fillVertexBufferLUT( visibleObjects );
}
//Now lock the texture and copy the 4x3 matrices!
size_t floatsPerEntity = mMatricesPerInstance * mRowLength * 4;
size_t entitiesPerPadding = (size_t)(mMaxFloatsPerLine / floatsPerEntity);
mMatrixTexture->getBuffer()->lock( HardwareBuffer::HBL_DISCARD );
const PixelBox &pixelBox = mMatrixTexture->getBuffer()->getCurrentLock();
float *pDest = static_cast<float*>(pixelBox.data);
if( mMeshReference->getSkeleton().isNull() )
{
//No animations, no anything (perhaps HW Basic is a better technique for this case)
std::for_each( visibleObjects->begin(), visibleObjects->end(),
SendAllSingleTransformsToTexture( pDest, floatsPerEntity,
entitiesPerPadding, mWidthFloatsPadding ) );
}
else
{
if( !useMatrixLookup && !mUseBoneDualQuaternions )
{
// Animations, normal
std::for_each( visibleObjects->begin(), visibleObjects->end(),
SendAllAnimatedTransformsToTexture( pDest, floatsPerEntity,
entitiesPerPadding, mWidthFloatsPadding,
mIndexToBoneMap ) );
}
else if( mUseBoneDualQuaternions )
{
// Animations, Dual Quaternion Skinning
std::for_each( visibleObjects->begin(), visibleObjects->end(),
SendAllDualQuatTexture( pDest, floatsPerEntity,
entitiesPerPadding,
mWidthFloatsPadding,
mIndexToBoneMap ) );
}
else
{
// Animations, LUT (lookup table)
std::for_each( visibleObjects->begin(), visibleObjects->end(),
SendAllLUTToTexture( pDest, floatsPerEntity,
entitiesPerPadding, mWidthFloatsPadding,
mIndexToBoneMap,
getMaxLookupTableInstances() ) );
}
}
mMatrixTexture->getBuffer()->unlock();
return visibleObjects->size();
}
