285 lines
9.2 KiB
C++
285 lines
9.2 KiB
C++
#pragma region License
|
|
/******************************************************************************
|
|
This file is part of the PolyVox library
|
|
Copyright (C) 2006 David Williams
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
******************************************************************************/
|
|
#pragma endregion
|
|
|
|
#pragma region Headers
|
|
#include "PolyVoxImpl/BlockData.h"
|
|
#include "Log.h"
|
|
#include "VolumeIterator.h"
|
|
#include "Region.h"
|
|
#include "Vector.h"
|
|
|
|
#include <cassert>
|
|
#include <cstring> //For memcpy
|
|
#include <stdexcept> //For invalid_argument
|
|
#pragma endregion
|
|
|
|
namespace PolyVox
|
|
{
|
|
#pragma region Constructors/Destructors
|
|
template <typename VoxelType>
|
|
Volume<VoxelType>::Volume(uint16_t uSideLength, uint16_t uBlockSideLength)
|
|
:m_pBlocks(0)
|
|
{
|
|
logImpl("In volume constructor");
|
|
//Debug mode validation
|
|
assert(isPowerOf2(uSideLength));
|
|
assert(isPowerOf2(uBlockSideLength));
|
|
assert(uBlockSideLength <= uSideLength);
|
|
|
|
//Release mode validation
|
|
if(!isPowerOf2(uSideLength))
|
|
{
|
|
throw std::invalid_argument("Volume side length must be a power of two.");
|
|
}
|
|
if(!isPowerOf2(uBlockSideLength))
|
|
{
|
|
throw std::invalid_argument("Block side length must be a power of two.");
|
|
}
|
|
if(uBlockSideLength > uSideLength)
|
|
{
|
|
throw std::invalid_argument("Block side length cannot be greater than volume side length.");
|
|
}
|
|
|
|
//Compute the volume side length
|
|
m_uSideLength = uSideLength;
|
|
m_uSideLengthPower = logBase2(m_uSideLength);
|
|
|
|
//Compute the block side length
|
|
m_uBlockSideLength = uBlockSideLength;
|
|
m_uBlockSideLengthPower = logBase2(m_uBlockSideLength);
|
|
|
|
//Compute the side length in blocks
|
|
m_uSideLengthInBlocks = m_uSideLength / m_uBlockSideLength;
|
|
|
|
//Compute number of blocks in the volume
|
|
m_uNoOfBlocksInVolume = m_uSideLengthInBlocks * m_uSideLengthInBlocks * m_uSideLengthInBlocks;
|
|
|
|
//Create the blocks
|
|
m_pBlocks = new Block<VoxelType>[m_uNoOfBlocksInVolume];
|
|
for(uint32_t i = 0; i < m_uNoOfBlocksInVolume; ++i)
|
|
{
|
|
m_pBlocks[i].m_pBlockData = getHomogenousBlockData(0);
|
|
m_pBlocks[i].m_bIsShared = true;
|
|
m_pBlocks[i].m_bIsPotentiallySharable = false;
|
|
m_pBlocks[i].m_pHomogenousValue = 0;
|
|
}
|
|
}
|
|
|
|
/*template <typename VoxelType>
|
|
Volume<VoxelType>::Volume(const Volume<VoxelType>& rhs)
|
|
{
|
|
*this = rhs;
|
|
}*/
|
|
|
|
template <typename VoxelType>
|
|
Volume<VoxelType>::~Volume()
|
|
{
|
|
delete[] m_pBlocks;
|
|
}
|
|
#pragma endregion
|
|
|
|
#pragma region Operators
|
|
/*template <typename VoxelType>
|
|
Volume<VoxelType>& Volume<VoxelType>::operator=(const Volume& rhs)
|
|
{
|
|
|
|
}*/
|
|
#pragma endregion
|
|
|
|
#pragma region Getters
|
|
template <typename VoxelType>
|
|
Region Volume<VoxelType>::getEnclosingRegion(void) const
|
|
{
|
|
return Region(Vector3DInt32(0,0,0), Vector3DInt32(m_uSideLength-1,m_uSideLength-1,m_uSideLength-1));
|
|
}
|
|
|
|
template <typename VoxelType>
|
|
uint16_t Volume<VoxelType>::getSideLength(void) const
|
|
{
|
|
return m_uSideLength;
|
|
}
|
|
|
|
template <typename VoxelType>
|
|
VoxelType Volume<VoxelType>::getVoxelAt(uint16_t uXPos, uint16_t uYPos, uint16_t uZPos) const
|
|
{
|
|
assert(uXPos < getSideLength());
|
|
assert(uYPos < getSideLength());
|
|
assert(uZPos < getSideLength());
|
|
|
|
const uint16_t blockX = uXPos >> m_uBlockSideLengthPower;
|
|
const uint16_t blockY = uYPos >> m_uBlockSideLengthPower;
|
|
const uint16_t blockZ = uZPos >> m_uBlockSideLengthPower;
|
|
|
|
const uint16_t xOffset = uXPos - (blockX << m_uBlockSideLengthPower);
|
|
const uint16_t yOffset = uYPos - (blockY << m_uBlockSideLengthPower);
|
|
const uint16_t zOffset = uZPos - (blockZ << m_uBlockSideLengthPower);
|
|
|
|
const Block<VoxelType>& block = m_pBlocks
|
|
[
|
|
blockX +
|
|
blockY * m_uSideLengthInBlocks +
|
|
blockZ * m_uSideLengthInBlocks * m_uSideLengthInBlocks
|
|
];
|
|
|
|
return block.m_pBlockData->getVoxelAt(xOffset,yOffset,zOffset);
|
|
}
|
|
|
|
template <typename VoxelType>
|
|
VoxelType Volume<VoxelType>::getVoxelAt(const Vector3DUint16& v3dPos) const
|
|
{
|
|
assert(v3dPos.getX() < m_uSideLength);
|
|
assert(v3dPos.getY() < m_uSideLength);
|
|
assert(v3dPos.getZ() < m_uSideLength);
|
|
|
|
return getVoxelAt(v3dPos.getX(), v3dPos.getY(), v3dPos.getZ());
|
|
}
|
|
#pragma endregion
|
|
|
|
#pragma region Setters
|
|
template <typename VoxelType>
|
|
void Volume<VoxelType>::setVoxelAt(uint16_t uXPos, uint16_t uYPos, uint16_t uZPos, VoxelType tValue)
|
|
{
|
|
const uint16_t blockX = uXPos >> m_uBlockSideLengthPower;
|
|
const uint16_t blockY = uYPos >> m_uBlockSideLengthPower;
|
|
const uint16_t blockZ = uZPos >> m_uBlockSideLengthPower;
|
|
|
|
const uint16_t xOffset = uXPos - (blockX << m_uBlockSideLengthPower);
|
|
const uint16_t yOffset = uYPos - (blockY << m_uBlockSideLengthPower);
|
|
const uint16_t zOffset = uZPos - (blockZ << m_uBlockSideLengthPower);
|
|
|
|
Block<VoxelType>& block = m_pBlocks
|
|
[
|
|
blockX +
|
|
blockY * m_uSideLengthInBlocks +
|
|
blockZ * m_uSideLengthInBlocks * m_uSideLengthInBlocks
|
|
];
|
|
|
|
if(block.m_bIsShared)
|
|
{
|
|
const VoxelType tHomogenousValue = block.m_pHomogenousValue;
|
|
if(tHomogenousValue != tValue)
|
|
{
|
|
POLYVOX_SHARED_PTR< BlockData<VoxelType> > pNewBlockData(new BlockData<VoxelType>(m_uBlockSideLength));
|
|
block.m_pBlockData = pNewBlockData;
|
|
block.m_bIsShared = false;
|
|
block.m_bIsPotentiallySharable = false;
|
|
block.m_pBlockData->fill(tHomogenousValue);
|
|
block.m_pBlockData->setVoxelAt(xOffset,yOffset,zOffset, tValue);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
block.m_pBlockData->setVoxelAt(xOffset,yOffset,zOffset, tValue);
|
|
//There is a chance that setting this voxel makes the block homogenous and therefore shareable. But checking
|
|
//this will take some time, so for now just set a flag.
|
|
block.m_bIsPotentiallySharable = true;
|
|
}
|
|
}
|
|
|
|
template <typename VoxelType>
|
|
void Volume<VoxelType>::setVoxelAt(const Vector3DUint16& v3dPos, VoxelType tValue)
|
|
{
|
|
setVoxelAt(v3dPos.getX(), v3dPos.getY(), v3dPos.getZ(), tValue);
|
|
}
|
|
#pragma endregion
|
|
|
|
#pragma region Other
|
|
template <typename VoxelType>
|
|
void Volume<VoxelType>::idle(uint32_t uAmount)
|
|
{
|
|
//This function performs two roles. Firstly, it examines all of the blocks which are marked as
|
|
//'potentially sharable' to determine whether they really are sharable or not. For those which
|
|
//are sharable, it adjusts the pointer and deletes tho old data. Secondly, it determines which
|
|
//homogeneous regions are not actually being used (by thier reference count) and frees them.
|
|
|
|
for(uint32_t i = 0; i < m_uNoOfBlocksInVolume; ++i)
|
|
{
|
|
Block<VoxelType> block = m_pBlocks[i];
|
|
if(block.m_bIsPotentiallySharable)
|
|
{
|
|
bool isSharable = block.m_pBlockData->isHomogeneous();
|
|
if(isSharable)
|
|
{
|
|
VoxelType homogeneousValue = block.m_pBlockData->getVoxelAt(0,0,0);
|
|
delete block.m_pBlockData;
|
|
|
|
block.m_pBlockData = getHomogenousBlockData(homogeneousValue);
|
|
block.m_pHomogenousValue = homogeneousValue;
|
|
block.m_bIsShared = true;
|
|
}
|
|
|
|
//Either way, we have now determined whether the block was sharable. So it's not *potentially* sharable.
|
|
block.m_bIsPotentiallySharable = false;
|
|
}
|
|
}
|
|
|
|
//Note - this second step should probably happen immediatly, rather than in this function.
|
|
//Use of a shared pointer system would allow this.
|
|
}
|
|
|
|
template <typename VoxelType>
|
|
bool Volume<VoxelType>::isRegionHomogenous(const Region& region)
|
|
{
|
|
VolumeIterator<VoxelType> iter(*this);
|
|
iter.setValidRegion(region);
|
|
iter.setPosition(static_cast<Vector3DInt16>(region.getLowerCorner()));
|
|
|
|
VoxelType tFirst = iter.getVoxel();
|
|
iter.moveForwardInRegionXYZ();
|
|
|
|
do
|
|
{
|
|
VoxelType tCurrent = iter.getVoxel();
|
|
if(tCurrent != tFirst)
|
|
{
|
|
return false;
|
|
}
|
|
}while(iter.moveForwardInRegionXYZ());
|
|
|
|
return true;
|
|
}
|
|
#pragma endregion
|
|
|
|
#pragma region Private Implementation
|
|
template <typename VoxelType>
|
|
POLYVOX_SHARED_PTR< BlockData<VoxelType> > Volume<VoxelType>::getHomogenousBlockData(VoxelType tHomogenousValue) const
|
|
{
|
|
typename std::map<VoxelType, POLYVOX_WEAK_PTR< BlockData<VoxelType> > >::iterator iterResult = m_pHomogenousBlockData.find(tHomogenousValue);
|
|
if(iterResult == m_pHomogenousBlockData.end())
|
|
{
|
|
Block<VoxelType> block;
|
|
POLYVOX_SHARED_PTR< BlockData<VoxelType> > temp(new BlockData<VoxelType>(m_uBlockSideLength));
|
|
block.m_pBlockData = temp;
|
|
//block.m_uReferenceCount++;
|
|
block.m_pBlockData->fill(tHomogenousValue);
|
|
m_pHomogenousBlockData.insert(std::make_pair(tHomogenousValue, temp));
|
|
return block.m_pBlockData;
|
|
}
|
|
else
|
|
{
|
|
//iterResult->second.m_uReferenceCount++;
|
|
POLYVOX_SHARED_PTR< BlockData<VoxelType> > result(iterResult->second);
|
|
return result;
|
|
}
|
|
}
|
|
#pragma endregion
|
|
}
|