livre::MemoryUnitPtr sample( const livre::LODNode& node,
const livre::VolumeInformation& info ) const
{
// called from multiple render threads, only have one update running
lunchbox::ScopedWrite mutex( _lock );
EventSourcePtr loader = source->getEventSource();
const uint32_t timeStep = node.getNodeId().getTimeStep();
loader->setTime( timeStep );
const vmml::Vector3i& voxels = info.maximumBlockSize;
ByteVolume::SizeType vSize;
vSize[0] = voxels[0];
vSize[1] = voxels[1];
vSize[2] = voxels[2];
ByteVolume::RegionType region;
region.SetSize( vSize );
// Real-world coordinate setup
const AABBf& bbox = source->getBoundingBox();
const Vector3f& baseSpacing = ( bbox.getSize() + _borders )
/ info.voxels;
const int32_t levelFromBottom = info.rootNode.getDepth() - 1 -
node.getRefLevel();
const float spacingFactor = 1 << levelFromBottom;
ByteVolume::SpacingType spacing;
spacing[0] = baseSpacing.find_max() * spacingFactor;
spacing[1] = spacing[0];
spacing[2] = spacing[0];
const Vector3f& offset =
( bbox.getMin() - _borders / 2.0f ) + node.getRelativePosition() *
Vector3f( bbox.getSize() + _borders );
ByteVolume::PointType origin;
origin[0] = offset[0];
origin[1] = offset[1];
origin[2] = offset[2];
auto volume = source->GetOutput();
volume->SetRegions( region );
volume->SetSpacing( spacing );
volume->SetOrigin( origin );
source->Modified();
scaler.Update();
const size_t size = voxels[0] * voxels[1] * voxels[2] *
info.compCount * info.getBytesPerVoxel();
return livre::MemoryUnitPtr( new livre::AllocMemoryUnit(
scaler.GetOutput()->GetBufferPointer(), size ));
}
::zeq::Event serializeDataSample( const uint128_t& id,
const livre::LODNode& node )
{
::zeq::Event event( id );
flatbuffers::FlatBufferBuilder& fbb = event.getFBB();
// must construct nested structs before - only one fbb op can be in progress
auto blockSize = fbb.CreateVector( node.getBlockSize().array, 3 );
auto worldBoxMin = fbb.CreateVector( node.getWorldBox().getMin().array, 3 );
auto worldBoxMax = fbb.CreateVector( node.getWorldBox().getMax().array, 3 );
LODNodeBuilder builder( fbb );
builder.add_nodeId( node.getNodeId().getId( ));
builder.add_blockSize( blockSize );
builder.add_worldBoxMin( worldBoxMin );
builder.add_worldBoxMax( worldBoxMax );
fbb.Finish( builder.Finish( ));
return event;
}
livre::MemoryUnitPtr sample( const livre::LODNode& node,
const livre::VolumeInformation& info ) const
{
::fivox::EventSourcePtr loader = source->getFunctor()->getSource();
const uint32_t frame = node.getNodeId().getFrame();
if( !loader->load( frame ))
return livre::MemoryUnitPtr();
// Alloc voxels
const vmml::Vector3i& voxels = info.maximumBlockSize;
ByteVolume::SizeType vSize;
vSize[0] = voxels[0];
vSize[1] = voxels[1];
vSize[2] = voxels[2];
ByteVolume::RegionType region;
region.SetSize( vSize );
// Real-world coordinate setup
const ::fivox::AABBf& bbox = loader->getBoundingBox();
const Vector3f& baseSpacing = ( bbox.getSize() + _borders )
/ info.voxels;
const int32_t levelFromBottom = info.rootNode.getDepth() - 1 -
node.getRefLevel();
const float spacingFactor = 1 << levelFromBottom;
ByteVolume::SpacingType spacing;
spacing[0] = baseSpacing.find_max() * spacingFactor;
spacing[1] = spacing[0];
spacing[2] = spacing[0];
const Vector3f& offset =
( bbox.getMin() - _borders / 2.0f ) + node.getRelativePosition() *
Vector3f( bbox.getSize() + _borders );
ByteVolume::PointType origin;
origin[0] = offset[0];
origin[1] = offset[1];
origin[2] = offset[2];
// called from multiple render threads, only have one update running
lunchbox::ScopedWrite mutex( _lock );
VolumePtr output = source->GetOutput();
output->SetRegions( region );
output->SetSpacing( spacing );
output->SetOrigin( origin );
#ifdef LIVRE_DEBUG_RENDERING
std::cout << "Sample " << node.getRefLevel() << ' '
<< node.getRelativePosition() << " (" << spacing << " @ "
<< origin << 'x'
<< baseSpacing * spacingFactor * voxels << ")"
<< std::endl;
#endif
source->Modified();
source->Update();
livre::AllocMemoryUnitPtr memoryUnit( new livre::AllocMemoryUnit );
const size_t size = voxels[0] * voxels[1] * voxels[2] *
info.compCount * info.getBytesPerVoxel();
memoryUnit->allocAndSetData( output->GetBufferPointer(), size );
return memoryUnit;
}