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Work on VolumeChangeTracker.

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This commit is contained in:
David Williams
2009-04-21 21:46:55 +00:00
parent d61827c365
commit 498db68b59
3 changed files with 45 additions and 65 deletions
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94
library/PolyVoxUtil/source/VolumeChangeTracker.cpp
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@ -35,7 +35,7 @@ using namespace std;
namespace PolyVox
{
int32_t VolumeChangeTracker::m_iCurrentTime = 0;
uint32_t VolumeChangeTracker::m_uCurrentTime = 0;
//////////////////////////////////////////////////////////////////////////
// VolumeChangeTracker
@ -51,9 +51,9 @@ namespace PolyVox
m_uVolumeDepthInRegions = volumeData->getDepth() / m_uRegionSideLength;
m_uRegionSideLengthPower = PolyVox::logBase2(m_uRegionSideLength);
uint16_t uLongestSideLength = (std::max)((std::max)(m_uVolumeWidthInRegions,m_uVolumeHeightInRegions),m_uVolumeDepthInRegions);
uint16_t uShortestSideLengthInRegions = (std::min)((std::min)(m_uVolumeWidthInRegions,m_uVolumeHeightInRegions),m_uVolumeDepthInRegions);
volRegionLastModified = new BlockData<int32_t>(uLongestSideLength); //FIXME - Maybe using a block here isn't optimal as it must always be cubic...
volRegionLastModified = new Volume<int32_t>(m_uVolumeWidthInRegions, m_uVolumeHeightInRegions, m_uVolumeDepthInRegions, uShortestSideLengthInRegions); //FIXME - Maybe using a block here isn't optimal as it must always be cubic...
}
VolumeChangeTracker::~VolumeChangeTracker()
@ -68,8 +68,8 @@ namespace PolyVox
{
for(uint16_t blockX = 0; blockX < m_uVolumeWidthInRegions; ++blockX)
{
volRegionLastModified->setVoxelAt(blockX, blockY, blockZ, m_iCurrentTime);
++m_iCurrentTime;
volRegionLastModified->setVoxelAt(blockX, blockY, blockZ, m_uCurrentTime);
incrementCurrentTime();
}
}
}
@ -77,27 +77,7 @@ namespace PolyVox
int32_t VolumeChangeTracker::getCurrentTime(void) const
{
return m_iCurrentTime;
}
uint16_t VolumeChangeTracker::getWidth(void)
{
return volumeData->getWidth();
}
uint16_t VolumeChangeTracker::getHeight(void)
{
return volumeData->getHeight();
}
uint16_t VolumeChangeTracker::getDepth(void)
{
return volumeData->getDepth();
}
Region VolumeChangeTracker::getEnclosingRegion(void) const
{
return volumeData->getEnclosingRegion();
return m_uCurrentTime;
}
int32_t VolumeChangeTracker::getLastModifiedTimeForRegion(uint16_t uX, uint16_t uY, uint16_t uZ)
@ -105,35 +85,17 @@ namespace PolyVox
return volRegionLastModified->getVoxelAt(uX, uY, uZ);
}
uint8_t VolumeChangeTracker::getVoxelAt(const Vector3DUint16& pos)
{
return getVoxelAt(pos.getX(), pos.getY(), pos.getZ());
}
uint8_t VolumeChangeTracker::getVoxelAt(uint16_t uX, uint16_t uY, uint16_t uZ)
{
assert(uX < volumeData->getWidth());
assert(uY < volumeData->getHeight());
assert(uZ < volumeData->getDepth());
VolumeIterator<uint8_t> volIter(*volumeData);
volIter.setPosition(uX,uY,uZ);
return volIter.getVoxel();
}
Volume<uint8_t>* VolumeChangeTracker::getVolumeData(void) const
Volume<uint8_t>* VolumeChangeTracker::getWrappedVolume(void) const
{
return volumeData;
}
//NOTE - Document the fact that the time stamp is incremented at the start, not the end.
void VolumeChangeTracker::setVoxelAt(uint16_t x, uint16_t y, uint16_t z, uint8_t value)
{
++m_iCurrentTime;
//FIXME - rather than creating a iterator each time we should have one stored
//VolumeIterator<uint8_t> iterVol(*volumeData);
/*iterVol.setPosition(x,y,z);
iterVol.setVoxel(value);*/
//Note: We increase the time stamp both at the start and the end
//to avoid ambiguity about whether the timestamp comparison should
//be '<' vs '<=' or '>' vs '>=' in the users code.
incrementCurrentTime();
volumeData->setVoxelAt(x,y,z,value);
@ -145,7 +107,7 @@ namespace PolyVox
(z % m_uRegionSideLength != 0) &&
(z % m_uRegionSideLength != m_uRegionSideLength-1))
{
volRegionLastModified->setVoxelAt(x >> m_uRegionSideLengthPower, y >> m_uRegionSideLengthPower, z >> m_uRegionSideLengthPower, m_iCurrentTime);
volRegionLastModified->setVoxelAt(x >> m_uRegionSideLengthPower, y >> m_uRegionSideLengthPower, z >> m_uRegionSideLengthPower, m_uCurrentTime);
}
else //Mark surrounding regions as well
{
@ -167,12 +129,14 @@ namespace PolyVox
{
for(uint16_t xCt = minRegionX; xCt <= maxRegionX; xCt++)
{
volRegionLastModified->setVoxelAt(xCt,yCt,zCt,m_iCurrentTime);
volRegionLastModified->setVoxelAt(xCt,yCt,zCt,m_uCurrentTime);
}
}
}
}
//++m_iCurrentTime;
//Increment time stamp. See earlier note.
incrementCurrentTime();
}
void VolumeChangeTracker::setLockedVoxelAt(uint16_t x, uint16_t y, uint16_t z, uint8_t value)
@ -199,12 +163,16 @@ namespace PolyVox
void VolumeChangeTracker::unlockRegion(void)
{
++m_iCurrentTime;
if(!m_bIsLocked)
{
throw std::logic_error("No region is locked. You must lock a region before you can unlock it.");
}
//Note: We increase the time stamp both at the start and the end
//to avoid ambiguity about whether the timestamp comparison should
//be '<' vs '<=' or '>' vs '>=' in the users code.
incrementCurrentTime();
const uint16_t firstRegionX = m_regLastLocked.getLowerCorner().getX() >> m_uRegionSideLengthPower;
const uint16_t firstRegionY = m_regLastLocked.getLowerCorner().getY() >> m_uRegionSideLengthPower;
const uint16_t firstRegionZ = m_regLastLocked.getLowerCorner().getZ() >> m_uRegionSideLengthPower;
@ -219,12 +187,28 @@ namespace PolyVox
{
for(uint16_t xCt = firstRegionX; xCt <= lastRegionX; xCt++)
{
volRegionLastModified->setVoxelAt(xCt,yCt,zCt,m_iCurrentTime);
volRegionLastModified->setVoxelAt(xCt,yCt,zCt,m_uCurrentTime);
}
}
}
//++m_iCurrentTime;
m_bIsLocked = false;
//Increment time stamp. See earlier note.
incrementCurrentTime();
}
void VolumeChangeTracker::incrementCurrentTime(void)
{
//Increment the current time.
uint32_t time = m_uCurrentTime++;
//Watch out for wraparound. Hopefully this will never happen
//as we have a pretty by counter, but it's best to be sure...
assert(time < m_uCurrentTime);
if(time >= m_uCurrentTime)
{
throw std::overflow_error("The VolumeChangeTracker time has overflowed.");
}
}
}