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mCurrentVoxel is now zero if the current position is not in the volume. It used to just be set to some invalid address.

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This commit is contained in:
Daviw Williams
2012-12-07 15:56:46 +01:00
parent eb0c7e7a9f
commit 4be54c6dd1
4 changed files with 73 additions and 48 deletions
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41
library/PolyVoxCore/include/PolyVoxCore/LargeVolumeSampler.inl
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@ -103,21 +103,28 @@ namespace PolyVox
BaseVolume<VoxelType>::template Sampler< LargeVolume<VoxelType> >::setPosition(xPos, yPos, zPos);
// Then we update the voxel pointer
const int32_t uXBlock = this->mXPosInVolume >> this->mVolume->m_uBlockSideLengthPower;
const int32_t uYBlock = this->mYPosInVolume >> this->mVolume->m_uBlockSideLengthPower;
const int32_t uZBlock = this->mZPosInVolume >> this->mVolume->m_uBlockSideLengthPower;
if(this->isCurrentPositionValid())
{
const int32_t uXBlock = this->mXPosInVolume >> this->mVolume->m_uBlockSideLengthPower;
const int32_t uYBlock = this->mYPosInVolume >> this->mVolume->m_uBlockSideLengthPower;
const int32_t uZBlock = this->mZPosInVolume >> this->mVolume->m_uBlockSideLengthPower;
const uint16_t uXPosInBlock = static_cast<uint16_t>(this->mXPosInVolume - (uXBlock << this->mVolume->m_uBlockSideLengthPower));
const uint16_t uYPosInBlock = static_cast<uint16_t>(this->mYPosInVolume - (uYBlock << this->mVolume->m_uBlockSideLengthPower));
const uint16_t uZPosInBlock = static_cast<uint16_t>(this->mZPosInVolume - (uZBlock << this->mVolume->m_uBlockSideLengthPower));
const uint16_t uXPosInBlock = static_cast<uint16_t>(this->mXPosInVolume - (uXBlock << this->mVolume->m_uBlockSideLengthPower));
const uint16_t uYPosInBlock = static_cast<uint16_t>(this->mYPosInVolume - (uYBlock << this->mVolume->m_uBlockSideLengthPower));
const uint16_t uZPosInBlock = static_cast<uint16_t>(this->mZPosInVolume - (uZBlock << this->mVolume->m_uBlockSideLengthPower));
const uint32_t uVoxelIndexInBlock = uXPosInBlock +
uYPosInBlock * this->mVolume->m_uBlockSideLength +
uZPosInBlock * this->mVolume->m_uBlockSideLength * this->mVolume->m_uBlockSideLength;
const uint32_t uVoxelIndexInBlock = uXPosInBlock +
uYPosInBlock * this->mVolume->m_uBlockSideLength +
uZPosInBlock * this->mVolume->m_uBlockSideLength * this->mVolume->m_uBlockSideLength;
Block<VoxelType>* pUncompressedCurrentBlock = this->mVolume->getUncompressedBlock(uXBlock, uYBlock, uZBlock);
Block<VoxelType>* pUncompressedCurrentBlock = this->mVolume->getUncompressedBlock(uXBlock, uYBlock, uZBlock);
mCurrentVoxel = pUncompressedCurrentBlock->m_tUncompressedData + uVoxelIndexInBlock;
mCurrentVoxel = pUncompressedCurrentBlock->m_tUncompressedData + uVoxelIndexInBlock;
}
else
{
mCurrentVoxel = 0;
}
}
template <typename VoxelType>
@ -145,7 +152,7 @@ namespace PolyVox
BaseVolume<VoxelType>::template Sampler< LargeVolume<VoxelType> >::movePositiveX();
// Then we update the voxel pointer
if((this->isCurrentPositionValid()) && ((this->mXPosInVolume) % this->mVolume->m_uBlockSideLength != 0))
if((this->isCurrentPositionValid()) && mCurrentVoxel && ((this->mXPosInVolume) % this->mVolume->m_uBlockSideLength != 0))
{
//No need to compute new block.
++mCurrentVoxel;
@ -164,7 +171,7 @@ namespace PolyVox
BaseVolume<VoxelType>::template Sampler< LargeVolume<VoxelType> >::movePositiveY();
// Then we update the voxel pointer
if((this->isCurrentPositionValid()) && ((this->mYPosInVolume) % this->mVolume->m_uBlockSideLength != 0))
if((this->isCurrentPositionValid()) && mCurrentVoxel && ((this->mYPosInVolume) % this->mVolume->m_uBlockSideLength != 0))
{
//No need to compute new block.
mCurrentVoxel += this->mVolume->m_uBlockSideLength;
@ -183,7 +190,7 @@ namespace PolyVox
BaseVolume<VoxelType>::template Sampler< LargeVolume<VoxelType> >::movePositiveZ();
// Then we update the voxel pointer
if((this->isCurrentPositionValid()) && ((this->mZPosInVolume) % this->mVolume->m_uBlockSideLength != 0))
if((this->isCurrentPositionValid()) && mCurrentVoxel && ((this->mZPosInVolume) % this->mVolume->m_uBlockSideLength != 0))
{
//No need to compute new block.
mCurrentVoxel += this->mVolume->m_uBlockSideLength * this->mVolume->m_uBlockSideLength;
@ -202,7 +209,7 @@ namespace PolyVox
BaseVolume<VoxelType>::template Sampler< LargeVolume<VoxelType> >::moveNegativeX();
// Then we update the voxel pointer
if((this->isCurrentPositionValid()) && ((this->mXPosInVolume + 1) % this->mVolume->m_uBlockSideLength != 0))
if((this->isCurrentPositionValid()) && mCurrentVoxel && ((this->mXPosInVolume + 1) % this->mVolume->m_uBlockSideLength != 0))
{
//No need to compute new block.
--mCurrentVoxel;
@ -221,7 +228,7 @@ namespace PolyVox
BaseVolume<VoxelType>::template Sampler< LargeVolume<VoxelType> >::moveNegativeY();
// Then we update the voxel pointer
if((this->isCurrentPositionValid()) && ((this->mYPosInVolume + 1) % this->mVolume->m_uBlockSideLength != 0))
if((this->isCurrentPositionValid()) && mCurrentVoxel && ((this->mYPosInVolume + 1) % this->mVolume->m_uBlockSideLength != 0))
{
//No need to compute new block.
mCurrentVoxel -= this->mVolume->m_uBlockSideLength;
@ -240,7 +247,7 @@ namespace PolyVox
BaseVolume<VoxelType>::template Sampler< LargeVolume<VoxelType> >::moveNegativeZ();
// Then we update the voxel pointer
if((this->isCurrentPositionValid()) && ((this->mZPosInVolume + 1) % this->mVolume->m_uBlockSideLength != 0))
if((this->isCurrentPositionValid()) && mCurrentVoxel && ((this->mZPosInVolume + 1) % this->mVolume->m_uBlockSideLength != 0))
{
//No need to compute new block.
mCurrentVoxel -= this->mVolume->m_uBlockSideLength * this->mVolume->m_uBlockSideLength;