216 lines
7.5 KiB
C++
216 lines
7.5 KiB
C++
#pragma region License
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/*******************************************************************************
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Copyright (c) 2005-2009 David Williams
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*******************************************************************************/
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#pragma endregion
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#include "VolumeChangeTracker.h"
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#include "GradientEstimators.h"
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#include "IndexedSurfacePatch.h"
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#include "PolyVoxImpl/MarchingCubesTables.h"
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#include "SurfaceVertex.h"
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#include "PolyVoxImpl/Utility.h"
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#include "Vector.h"
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#include "Volume.h"
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#include "VolumeSampler.h"
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using namespace std;
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namespace PolyVox
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{
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uint32_t VolumeChangeTracker::m_uCurrentTime = 0;
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//////////////////////////////////////////////////////////////////////////
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// VolumeChangeTracker
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//////////////////////////////////////////////////////////////////////////
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VolumeChangeTracker::VolumeChangeTracker(Volume<uint8_t>* volumeDataToSet, uint16_t regionSideLength)
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:m_bIsLocked(false)
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,volumeData(0)
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,m_uRegionSideLength(regionSideLength)
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{
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volumeData = volumeDataToSet;
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m_uVolumeWidthInRegions = volumeData->getWidth() / m_uRegionSideLength;
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m_uVolumeHeightInRegions = volumeData->getHeight() / m_uRegionSideLength;
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m_uVolumeDepthInRegions = volumeData->getDepth() / m_uRegionSideLength;
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m_uRegionSideLengthPower = PolyVox::logBase2(m_uRegionSideLength);
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volRegionLastModified = new Volume<int32_t>(m_uVolumeWidthInRegions, m_uVolumeHeightInRegions, m_uVolumeDepthInRegions, 0);
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}
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VolumeChangeTracker::~VolumeChangeTracker()
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{
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}
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void VolumeChangeTracker::setAllRegionsModified(void)
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{
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incrementCurrentTime();
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for(uint16_t blockZ = 0; blockZ < m_uVolumeDepthInRegions; ++blockZ)
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{
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for(uint16_t blockY = 0; blockY < m_uVolumeHeightInRegions; ++blockY)
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{
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for(uint16_t blockX = 0; blockX < m_uVolumeWidthInRegions; ++blockX)
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{
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volRegionLastModified->setVoxelAt(blockX, blockY, blockZ, m_uCurrentTime);
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}
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}
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}
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}
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int32_t VolumeChangeTracker::getCurrentTime(void) const
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{
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return m_uCurrentTime;
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}
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int32_t VolumeChangeTracker::getLastModifiedTimeForRegion(uint16_t uX, uint16_t uY, uint16_t uZ)
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{
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return volRegionLastModified->getVoxelAt(uX, uY, uZ);
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}
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Volume<uint8_t>* VolumeChangeTracker::getWrappedVolume(void) const
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{
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return volumeData;
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}
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void VolumeChangeTracker::setVoxelAt(uint16_t x, uint16_t y, uint16_t z, uint8_t value)
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{
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//Note: We increase the time stamp both at the start and the end
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//to avoid ambiguity about whether the timestamp comparison should
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//be '<' vs '<=' or '>' vs '>=' in the users code.
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incrementCurrentTime();
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volumeData->setVoxelAt(x,y,z,value);
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//If we are not on a boundary, just mark one region.
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if((x % m_uRegionSideLength != 0) &&
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(x % m_uRegionSideLength != m_uRegionSideLength-1) &&
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(y % m_uRegionSideLength != 0) &&
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(y % m_uRegionSideLength != m_uRegionSideLength-1) &&
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(z % m_uRegionSideLength != 0) &&
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(z % m_uRegionSideLength != m_uRegionSideLength-1))
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{
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volRegionLastModified->setVoxelAt(x >> m_uRegionSideLengthPower, y >> m_uRegionSideLengthPower, z >> m_uRegionSideLengthPower, m_uCurrentTime);
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}
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else //Mark surrounding regions as well
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{
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const uint16_t regionX = x >> m_uRegionSideLengthPower;
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const uint16_t regionY = y >> m_uRegionSideLengthPower;
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const uint16_t regionZ = z >> m_uRegionSideLengthPower;
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const uint16_t minRegionX = (std::max)(uint16_t(0),uint16_t(regionX-1));
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const uint16_t minRegionY = (std::max)(uint16_t(0),uint16_t(regionY-1));
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const uint16_t minRegionZ = (std::max)(uint16_t(0),uint16_t(regionZ-1));
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const uint16_t maxRegionX = (std::min)(uint16_t(m_uVolumeWidthInRegions-1),uint16_t(regionX+1));
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const uint16_t maxRegionY = (std::min)(uint16_t(m_uVolumeHeightInRegions-1),uint16_t(regionY+1));
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const uint16_t maxRegionZ = (std::min)(uint16_t(m_uVolumeDepthInRegions-1),uint16_t(regionZ+1));
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for(uint16_t zCt = minRegionZ; zCt <= maxRegionZ; zCt++)
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{
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for(uint16_t yCt = minRegionY; yCt <= maxRegionY; yCt++)
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{
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for(uint16_t xCt = minRegionX; xCt <= maxRegionX; xCt++)
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{
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volRegionLastModified->setVoxelAt(xCt,yCt,zCt,m_uCurrentTime);
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}
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}
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}
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}
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//Increment time stamp. See earlier note.
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incrementCurrentTime();
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}
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void VolumeChangeTracker::setLockedVoxelAt(uint16_t x, uint16_t y, uint16_t z, uint8_t value)
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{
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assert(m_bIsLocked);
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//FIXME - rather than creating a iterator each time we should have one stored
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/*VolumeSampler<uint8_t> iterVol(*volumeData);
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iterVol.setPosition(x,y,z);
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iterVol.setVoxel(value);*/
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volumeData->setVoxelAt(x,y,z,value);
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}
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void VolumeChangeTracker::lockRegion(const Region& regToLock)
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{
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if(m_bIsLocked)
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{
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throw std::logic_error("A region is already locked. Please unlock it before locking another.");
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}
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m_regLastLocked = regToLock;
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m_bIsLocked = true;
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}
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void VolumeChangeTracker::unlockRegion(void)
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{
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if(!m_bIsLocked)
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{
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throw std::logic_error("No region is locked. You must lock a region before you can unlock it.");
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}
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//Note: We increase the time stamp both at the start and the end
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//to avoid ambiguity about whether the timestamp comparison should
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//be '<' vs '<=' or '>' vs '>=' in the users code.
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incrementCurrentTime();
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const uint16_t firstRegionX = m_regLastLocked.getLowerCorner().getX() >> m_uRegionSideLengthPower;
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const uint16_t firstRegionY = m_regLastLocked.getLowerCorner().getY() >> m_uRegionSideLengthPower;
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const uint16_t firstRegionZ = m_regLastLocked.getLowerCorner().getZ() >> m_uRegionSideLengthPower;
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const uint16_t lastRegionX = m_regLastLocked.getUpperCorner().getX() >> m_uRegionSideLengthPower;
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const uint16_t lastRegionY = m_regLastLocked.getUpperCorner().getY() >> m_uRegionSideLengthPower;
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const uint16_t lastRegionZ = m_regLastLocked.getUpperCorner().getZ() >> m_uRegionSideLengthPower;
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for(uint16_t zCt = firstRegionZ; zCt <= lastRegionZ; zCt++)
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{
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for(uint16_t yCt = firstRegionY; yCt <= lastRegionY; yCt++)
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{
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for(uint16_t xCt = firstRegionX; xCt <= lastRegionX; xCt++)
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{
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volRegionLastModified->setVoxelAt(xCt,yCt,zCt,m_uCurrentTime);
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}
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}
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}
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m_bIsLocked = false;
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//Increment time stamp. See earlier note.
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incrementCurrentTime();
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}
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void VolumeChangeTracker::incrementCurrentTime(void)
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{
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//Increment the current time.
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uint32_t time = m_uCurrentTime++;
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//Watch out for wraparound. Hopefully this will never happen
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//as we have a pretty big counter, but it's best to be sure...
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assert(time < m_uCurrentTime);
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if(time >= m_uCurrentTime)
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{
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throw std::overflow_error("The VolumeChangeTracker time has overflowed.");
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}
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}
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}
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