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Started implementing 'IsQuadNeeded' for CubicSurfaceExtractor (without normals).

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This commit is contained in:
unknown 2012-08-09 16:54:45 +02:00
parent 301f93d896
commit 125d9000dd
3 changed files with 38 additions and 14 deletions
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7
library/PolyVoxCore/include/PolyVoxCore/CubicSurfaceExtractor.h
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@ -27,11 +27,12 @@ freely, subject to the following restrictions:
#include "PolyVoxImpl/TypeDef.h"
#include "PolyVoxCore/Array.h"
#include "PolyVoxCore/DefaultIsQuadNeeded.h"
#include "PolyVoxCore/SurfaceMesh.h"
namespace PolyVox
{
template<typename VolumeType>
template<typename VolumeType, typename IsQuadNeeded = DefaultIsQuadNeeded<typename VolumeType::VoxelType> >
class CubicSurfaceExtractor
{
struct IndexAndMaterial
@ -57,7 +58,7 @@ namespace PolyVox
};
public:
CubicSurfaceExtractor(VolumeType* volData, Region region, SurfaceMesh<PositionMaterial>* result, bool bMergeQuads = true);
CubicSurfaceExtractor(VolumeType* volData, Region region, SurfaceMesh<PositionMaterial>* result, bool bMergeQuads = true, IsQuadNeeded isQuadNeeded = IsQuadNeeded());
void execute();
@ -66,6 +67,8 @@ namespace PolyVox
bool performQuadMerging(std::list<Quad>& quads);
bool mergeQuads(Quad& q1, Quad& q2);
IsQuadNeeded m_funcIsQuadNeededCallback;
//The volume data and a sampler to access it.
VolumeType* m_volData;

25
library/PolyVoxCore/include/PolyVoxCore/CubicSurfaceExtractor.inl
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@ -31,20 +31,21 @@ namespace PolyVox
// The vertex position at the center of this group is then going to be used by six quads all with different materials.
// One futher note - we can actually have eight quads sharing a vertex position (imagine two 1x1x10 rows of voxels
// sharing a common edge) but in this case all eight quads will not have different materials.
template<typename VolumeType>
const uint32_t CubicSurfaceExtractor<VolumeType>::MaxVerticesPerPosition = 6;
template<typename VolumeType, typename IsQuadNeeded>
const uint32_t CubicSurfaceExtractor<VolumeType, IsQuadNeeded>::MaxVerticesPerPosition = 6;
template<typename VolumeType>
CubicSurfaceExtractor<VolumeType>::CubicSurfaceExtractor(VolumeType* volData, Region region, SurfaceMesh<PositionMaterial>* result, bool bMergeQuads)
template<typename VolumeType, typename IsQuadNeeded>
CubicSurfaceExtractor<VolumeType, IsQuadNeeded>::CubicSurfaceExtractor(VolumeType* volData, Region region, SurfaceMesh<PositionMaterial>* result, bool bMergeQuads, IsQuadNeeded isQuadNeeded)
:m_volData(volData)
,m_regSizeInVoxels(region)
,m_meshCurrent(result)
,m_bMergeQuads(bMergeQuads)
{
m_funcIsQuadNeededCallback = isQuadNeeded;
}
template<typename VolumeType>
void CubicSurfaceExtractor<VolumeType>::execute()
template<typename VolumeType, typename IsQuadNeeded>
void CubicSurfaceExtractor<VolumeType, IsQuadNeeded>::execute()
{
m_meshCurrent->clear();
@ -243,8 +244,8 @@ namespace PolyVox
m_meshCurrent->m_vecLodRecords.push_back(lodRecord);
}
template<typename VolumeType>
int32_t CubicSurfaceExtractor<VolumeType>::addVertex(float fX, float fY, float fZ, uint32_t uMaterialIn, Array<3, IndexAndMaterial>& existingVertices)
template<typename VolumeType, typename IsQuadNeeded>
int32_t CubicSurfaceExtractor<VolumeType, IsQuadNeeded>::addVertex(float fX, float fY, float fZ, uint32_t uMaterialIn, Array<3, IndexAndMaterial>& existingVertices)
{
uint32_t uX = static_cast<uint32_t>(fX + 0.75f);
uint32_t uY = static_cast<uint32_t>(fY + 0.75f);
@ -275,8 +276,8 @@ namespace PolyVox
return -1; //Should never happen.
}
template<typename VolumeType>
bool CubicSurfaceExtractor<VolumeType>::performQuadMerging(std::list<Quad>& quads)
template<typename VolumeType, typename IsQuadNeeded>
bool CubicSurfaceExtractor<VolumeType, IsQuadNeeded>::performQuadMerging(std::list<Quad>& quads)
{
bool bDidMerge = false;
for(typename std::list<Quad>::iterator outerIter = quads.begin(); outerIter != quads.end(); outerIter++)
@ -305,8 +306,8 @@ namespace PolyVox
return bDidMerge;
}
template<typename VolumeType>
bool CubicSurfaceExtractor<VolumeType>::mergeQuads(Quad& q1, Quad& q2)
template<typename VolumeType, typename IsQuadNeeded>
bool CubicSurfaceExtractor<VolumeType, IsQuadNeeded>::mergeQuads(Quad& q1, Quad& q2)
{
//All four vertices of a given quad have the same material,
//so just check that the first pair of vertices match.

20
library/PolyVoxCore/include/PolyVoxCore/Material.h
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@ -26,6 +26,8 @@ freely, subject to the following restrictions:
#include "PolyVoxImpl/TypeDef.h"
#include "PolyVoxCore/DefaultIsQuadNeeded.h" //we'll specialise this function for this voxel type
#include <cassert>
namespace PolyVox
@ -79,6 +81,24 @@ namespace PolyVox
typedef Material<uint8_t> Material8;
typedef Material<uint16_t> Material16;
template<typename Type>
class DefaultIsQuadNeeded< Material<Type> >
{
public:
bool operator()(Material<Type> back, Material<Type> front, float& materialToUse)
{
if((back.getMaterial() > 0) && (front.getMaterial() == 0))
{
materialToUse = static_cast<float>(back.getMaterial());
return true;
}
else
{
return false;
}
}
};
}
#endif //__PolyVox_Material_H__