AnotherFoxGuy/polyvox
1
0
Fork 0
Code Issues Pull Requests Activity

Fixes to behavour of LowPassFilter.

Browse Source
This commit is contained in:
David Williams
2011-12-03 09:43:27 +00:00
parent b972a2ceaf
commit d5d6319087
2 changed files with 48 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
library/PolyVoxCore/include/PolyVoxCore/LowPassFilter.inl
View File

@ -118,14 +118,18 @@ namespace PolyVox
template< template<typename> class SrcVolumeType, template<typename> class DestVolumeType, typename VoxelType>
void LowPassFilter<SrcVolumeType, DestVolumeType, VoxelType>::executeSAT()
{
const int border = m_uKernelSize - 1;
const uint32_t border = (m_uKernelSize - 1) / 2;
Vector3DInt32 satLowerCorner = m_regSrc.getLowerCorner() - Vector3DInt32(border+1, border+1, border+1);
Vector3DInt32 satLowerCorner = m_regSrc.getLowerCorner() - Vector3DInt32(border, border, border);
Vector3DInt32 satUpperCorner = m_regSrc.getUpperCorner() + Vector3DInt32(border, border, border);
RawVolume<uint32_t> satVolume(Region(satLowerCorner, satUpperCorner));
//Use floats for the SAT volume to ensure it works with negative
//densities and with both integral and floating point input volumes.
RawVolume<float> satVolume(Region(satLowerCorner, satUpperCorner));
//Clear to zeros (necessary?)
//FIXME - use Volume::fill() method. Implemented in base class as below
//but with optimised implementations in subclasses?
for(int32_t z = satLowerCorner.getZ(); z <= satUpperCorner.getZ(); z++)
{
for(int32_t y = satLowerCorner.getY(); y <= satUpperCorner.getY(); y++)
@ -137,9 +141,9 @@ namespace PolyVox
}
}
RawVolume<uint32_t>::Sampler satVolumeIter(&satVolume);
RawVolume<float>::Sampler satVolumeIter(&satVolume);
IteratorController<RawVolume<uint32_t>::Sampler> satIterCont;
IteratorController<RawVolume<float>::Sampler> satIterCont;
satIterCont.m_regValid = Region(satLowerCorner, satUpperCorner);
satIterCont.m_Iter = &satVolumeIter;
satIterCont.reset();
@ -153,9 +157,9 @@ namespace PolyVox
do
{
uint32_t previousSum = satVolumeIter.peekVoxel1nx0py0pz();
float previousSum = satVolumeIter.peekVoxel1nx0py0pz();
uint32_t currentVal = srcVolumeIter.getVoxel().getDensity();
float currentVal = static_cast<float>(srcVolumeIter.getVoxel().getDensity());
satVolumeIter.setVoxel(previousSum + currentVal);
@ -184,8 +188,8 @@ namespace PolyVox
{
for(int32_t x = satLowerCorner.getX(); x <= satUpperCorner.getX(); x++)
{
uint32_t previousSum = satVolume.getVoxelAt(x,y-1,z);
uint32_t currentSum = satVolume.getVoxelAt(x,y,z);
float previousSum = satVolume.getVoxelAt(x,y-1,z);
float currentSum = satVolume.getVoxelAt(x,y,z);
satVolume.setVoxelAt(x,y,z,previousSum + currentSum);
}
@ -198,8 +202,8 @@ namespace PolyVox
{
for(int32_t x = satLowerCorner.getX(); x <= satUpperCorner.getX(); x++)
{
uint32_t previousSum = satVolume.getVoxelAt(x,y,z-1);
uint32_t currentSum = satVolume.getVoxelAt(x,y,z);
float previousSum = satVolume.getVoxelAt(x,y,z-1);
float currentSum = satVolume.getVoxelAt(x,y,z);
satVolume.setVoxelAt(x,y,z,previousSum + currentSum);
}
@ -227,24 +231,24 @@ namespace PolyVox
int32_t satUpperY = iSrcY + border;
int32_t satUpperZ = iSrcZ + border;
int32_t a = satVolume.getVoxelAt(satLowerX,satLowerY,satLowerZ);
int32_t b = satVolume.getVoxelAt(satUpperX,satLowerY,satLowerZ);
int32_t c = satVolume.getVoxelAt(satLowerX,satUpperY,satLowerZ);
int32_t d = satVolume.getVoxelAt(satUpperX,satUpperY,satLowerZ);
int32_t e = satVolume.getVoxelAt(satLowerX,satLowerY,satUpperZ);
int32_t f = satVolume.getVoxelAt(satUpperX,satLowerY,satUpperZ);
int32_t g = satVolume.getVoxelAt(satLowerX,satUpperY,satUpperZ);
int32_t h = satVolume.getVoxelAt(satUpperX,satUpperY,satUpperZ);
float a = satVolume.getVoxelAt(satLowerX,satLowerY,satLowerZ);
float b = satVolume.getVoxelAt(satUpperX,satLowerY,satLowerZ);
float c = satVolume.getVoxelAt(satLowerX,satUpperY,satLowerZ);
float d = satVolume.getVoxelAt(satUpperX,satUpperY,satLowerZ);
float e = satVolume.getVoxelAt(satLowerX,satLowerY,satUpperZ);
float f = satVolume.getVoxelAt(satUpperX,satLowerY,satUpperZ);
float g = satVolume.getVoxelAt(satLowerX,satUpperY,satUpperZ);
float h = satVolume.getVoxelAt(satUpperX,satUpperY,satUpperZ);
int32_t sum = h+c-d-g-f-a+b+e;
float sum = h+c-d-g-f-a+b+e;
int32_t sideLength = border * 2 + 1;
uint32_t sideLength = border * 2 + 1;
int32_t average = sum / (sideLength*sideLength*sideLength);
float average = sum / (static_cast<float>(sideLength*sideLength*sideLength));
VoxelType voxel = m_pVolSrc->getVoxelAt(iDstX, iDstY, iDstZ);
voxel.setDensity(average);
voxel.setDensity(static_cast<VoxelType::DensityType>(average));
m_pVolDst->setVoxelAt(iDstX, iDstY, iDstZ, voxel);