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More work on CubicSurfaceExtractor.

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This commit is contained in:
David Williams 2010-10-20 21:09:55 +00:00
parent 0ca8a334f2
commit 695c15cecd
2 changed files with 19 additions and 16 deletions
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4
library/PolyVoxCore/include/CubicSurfaceExtractor.h
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@ -33,8 +33,8 @@ namespace PolyVox
{
struct IndexAndMaterial
{
int32_t iIndex;
uint8_t uMaterial;
int32_t iIndex : 24;
int32_t uMaterial : 8;
};
template <typename VoxelType>

31
library/PolyVoxCore/include/CubicSurfaceExtractor.inl
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@ -157,31 +157,34 @@ namespace PolyVox
}
template <typename VoxelType>
int32_t CubicSurfaceExtractor<VoxelType>::addVertex(float fX, float fY, float fZ, uint8_t uMaterial)
int32_t CubicSurfaceExtractor<VoxelType>::addVertex(float fX, float fY, float fZ, uint8_t uMaterialIn)
{
uint16_t uX = static_cast<uint16_t>(fX + 0.75f);
uint16_t uY = static_cast<uint16_t>(fY + 0.75f);
uint16_t uZ = static_cast<uint16_t>(fZ + 0.75f);
//uint32_t index = uX + (uY * (m_regSizeInVoxels.width()+2)) + (uZ * (m_regSizeInVoxels.height()+2) * (m_regSizeInVoxels.height()+2));
for(int ct = 0; ct < 16; ct++)
{
if(m_vertices[uX][uY][uZ][ct].iIndex != -1)
{
//We have a vertex here, check if the material matches
if(m_vertices[uX][uY][uZ][ct].uMaterial == uMaterial)
{
//Yep, this is our vertex. Return it.
return m_vertices[uX][uY][uZ][ct].iIndex;
}
IndexAndMaterial& rEntry = m_vertices[uX][uY][uZ][ct];
int32_t iIndex = static_cast<int32_t>(rEntry.iIndex);
uint8_t uMaterial = static_cast<uint8_t>(rEntry.uMaterial);
//If we have an existing vertex and the material matches then we can return it.
if((iIndex != -1) && (uMaterial == uMaterialIn))
{
return iIndex;
}
else
{
//No vertices matched and we've now hit an empty space. Fill it by creating a vertex.
uint32_t temp = m_meshCurrent->addVertex(PositionMaterial(Vector3DFloat(fX, fY, fZ), uMaterial));
m_vertices[uX][uY][uZ][ct].iIndex = temp;
m_vertices[uX][uY][uZ][ct].uMaterial = uMaterial;
uint32_t temp = m_meshCurrent->addVertex(PositionMaterial(Vector3DFloat(fX, fY, fZ), uMaterialIn));
//Note - Slightly dodgy casting taking place here. No proper way to convert to 24-bit int though?
//If problematic in future then fix IndexAndMaterial to contain variables rather than bitfield.
rEntry.iIndex = temp;
rEntry.uMaterial = uMaterialIn;
return temp;
}
}