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Work on removing hard coded vales.

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This commit is contained in:
David Williams
2009-03-22 22:45:50 +00:00
parent f705eaf67c
commit 02319db9dc
4 changed files with 65 additions and 44 deletions
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11
library/include/PolyVoxCore/PolyVoxImpl/ReferenceSurfaceExtractor.h
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@ -30,11 +30,16 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#include "PolyVoxCore/PolyVoxCStdInt.h"
#pragma endregion
#include <vector>
namespace PolyVox
{
void extractReferenceSurfaceImpl(Volume<uint8>* volumeData, Region region, IndexedSurfacePatch* singleMaterialPatch);
int32 getIndexFor(const Vector3DFloat& pos, int32 vertexIndicesX[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1], int32 vertexIndicesY[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1], int32 vertexIndicesZ[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1]);
void setIndexFor(const Vector3DFloat& pos, int32 newIndex, int32 vertexIndicesX[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1], int32 vertexIndicesY[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1], int32 vertexIndicesZ[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1]);
///A simple version of the surface extractor optimised for readability rather than speed.
void extractReferenceSurfaceImpl(Volume<uint8>* volumeData, Region region, IndexedSurfacePatch* singleMaterialPatch); //FIXME - should pass variables by reference?
///Determines whether a vertex already exists for a given edge, and if so returns it's index.
int32 getIndexFor(const Vector3DFloat& pos, const Vector3DInt32& regionDimensions, const std::vector<int32>& vertexIndicesX, const std::vector<int32>& vertexIndicesY, const std::vector<int32>& vertexIndicesZ);
///Sets the index of an existing vertex for a given edge.
void setIndexFor(const Vector3DFloat& pos, const Vector3DInt32& regionDimensions, int32 newIndex, std::vector<int32>& vertexIndicesX, std::vector<int32>& vertexIndicesY, std::vector<int32>& vertexIndicesZ);
}
#endif

1
library/include/PolyVoxCore/Region.h
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@ -47,6 +47,7 @@ namespace PolyVox
void shift(const Vector3DInt32& amount);
void shiftLowerCorner(const Vector3DInt32& amount);
void shiftUpperCorner(const Vector3DInt32& amount);
Vector3DInt32 dimensions(void);
private:
Vector3DInt32 m_v3dLowerCorner;

92
library/source/PolyVoxCore/PolyVoxImpl/ReferenceSurfaceExtractor.cpp
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@ -33,13 +33,18 @@ namespace PolyVox
{
void extractReferenceSurfaceImpl(Volume<uint8>* volumeData, Region region, IndexedSurfacePatch* singleMaterialPatch)
{
static int32 vertexIndicesX[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1];
/*static int32 vertexIndicesX[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1];
static int32 vertexIndicesY[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1];
static int32 vertexIndicesZ[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1];
static int32 vertexIndicesZ[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1];*/
memset(vertexIndicesX,0xFF,sizeof(vertexIndicesX)); //0xFF is -1 as two's complement - this may not be portable...
memset(vertexIndicesY,0xFF,sizeof(vertexIndicesY));
memset(vertexIndicesZ,0xFF,sizeof(vertexIndicesZ));
Vector3DInt32 regionDimensions = region.dimensions() + Vector3DInt32(1,1,1);
std::vector<int32> vertexIndicesX(regionDimensions.getX() * regionDimensions.getY() * regionDimensions.getZ());
std::vector<int32> vertexIndicesY(regionDimensions.getX() * regionDimensions.getY() * regionDimensions.getZ());
std::vector<int32> vertexIndicesZ(regionDimensions.getX() * regionDimensions.getY() * regionDimensions.getZ());
memset(&vertexIndicesX[0],0xFF,sizeof(vertexIndicesX[0]) * vertexIndicesX.size()); //0xFF is -1 as two's complement - this may not be portable...
memset(&vertexIndicesY[0],0xFF,sizeof(vertexIndicesY[0]) * vertexIndicesY.size()); //FIXME - can we just use sizeof(vertexIndicesY)?
memset(&vertexIndicesZ[0],0xFF,sizeof(vertexIndicesZ[0]) * vertexIndicesZ.size());
//When generating the mesh for a region we actually look one voxel outside it in the
// back, bottom, right direction. Protect against access violations by cropping region here
@ -245,25 +250,25 @@ namespace PolyVox
SurfaceVertex v1(vertex1, normal1, material1 + 0.1f);
SurfaceVertex v2(vertex2, normal2, material2 + 0.1f);
int32 index0 = getIndexFor(v0.getPosition(), vertexIndicesX, vertexIndicesY, vertexIndicesZ);
int32 index0 = getIndexFor(v0.getPosition(), regionDimensions, vertexIndicesX, vertexIndicesY, vertexIndicesZ);
if(index0 == -1)
{
index0 = singleMaterialPatch->addVertex(v0);
setIndexFor(v0.getPosition(), index0, vertexIndicesX, vertexIndicesY, vertexIndicesZ);
setIndexFor(v0.getPosition(), regionDimensions, index0, vertexIndicesX, vertexIndicesY, vertexIndicesZ);
}
int32 index1 = getIndexFor(v1.getPosition(), vertexIndicesX, vertexIndicesY, vertexIndicesZ);
int32 index1 = getIndexFor(v1.getPosition(), regionDimensions, vertexIndicesX, vertexIndicesY, vertexIndicesZ);
if(index1 == -1)
{
index1 = singleMaterialPatch->addVertex(v1);
setIndexFor(v1.getPosition(), index1, vertexIndicesX, vertexIndicesY, vertexIndicesZ);
setIndexFor(v1.getPosition(), regionDimensions, index1, vertexIndicesX, vertexIndicesY, vertexIndicesZ);
}
int32 index2 = getIndexFor(v2.getPosition(), vertexIndicesX, vertexIndicesY, vertexIndicesZ);
int32 index2 = getIndexFor(v2.getPosition(), regionDimensions, vertexIndicesX, vertexIndicesY, vertexIndicesZ);
if(index2 == -1)
{
index2 = singleMaterialPatch->addVertex(v2);
setIndexFor(v2.getPosition(), index2, vertexIndicesX, vertexIndicesY, vertexIndicesZ);
setIndexFor(v2.getPosition(), regionDimensions, index2, vertexIndicesX, vertexIndicesY, vertexIndicesZ);
}
singleMaterialPatch->addTriangle(index0, index1, index2);
@ -271,7 +276,7 @@ namespace PolyVox
}//For each cell
}
int32 getIndexFor(const Vector3DFloat& pos, int32 vertexIndicesX[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1], int32 vertexIndicesY[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1], int32 vertexIndicesZ[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1])
int32 getIndexFor(const Vector3DFloat& pos, const Vector3DInt32& regionDimensions, const std::vector<int32>& vertexIndicesX, const std::vector<int32>& vertexIndicesY, const std::vector<int32>& vertexIndicesZ)
{
assert(pos.getX() >= 0.0f);
assert(pos.getY() >= 0.0f);
@ -280,30 +285,33 @@ namespace PolyVox
assert(pos.getY() <= POLYVOX_REGION_SIDE_LENGTH);
assert(pos.getZ() <= POLYVOX_REGION_SIDE_LENGTH);
float xIntPart;
float xFracPart = std::modf(pos.getX(), &xIntPart);
float yIntPart;
float yFracPart = std::modf(pos.getY(), &yIntPart);
float zIntPart;
float zFracPart = std::modf(pos.getZ(), &zIntPart);
float xIntPartAsFloat;
float xFracPart = std::modf(pos.getX(), &xIntPartAsFloat);
float yIntPartAsFloat;
float yFracPart = std::modf(pos.getY(), &yIntPartAsFloat);
float zIntPartAsFloat;
float zFracPart = std::modf(pos.getZ(), &zIntPartAsFloat);
//Of all the fractional parts, two should be zero and one should have a value.
if(xFracPart > 0.000001f)
uint16 xIntPart = static_cast<uint16>(xIntPartAsFloat);
uint16 yIntPart = static_cast<uint16>(yIntPartAsFloat);
uint16 zIntPart = static_cast<uint16>(zIntPartAsFloat);
//Of all the fractional parts, two should be zero and one should be 0.5.
if(xFracPart > 0.25f)
{
return vertexIndicesX[static_cast<uint16>(xIntPart)][static_cast<uint16>(yIntPart)][static_cast<uint16>(zIntPart)];
return vertexIndicesX[xIntPart + yIntPart * regionDimensions.getX() + zIntPart * regionDimensions.getX() * regionDimensions.getY()];
}
if(yFracPart > 0.000001f)
if(yFracPart > 0.25f)
{
return vertexIndicesY[static_cast<uint16>(xIntPart)][static_cast<uint16>(yIntPart)][static_cast<uint16>(zIntPart)];
return vertexIndicesY[xIntPart + yIntPart * regionDimensions.getX() + zIntPart * regionDimensions.getX() * regionDimensions.getY()];
}
if(zFracPart > 0.000001f)
if(zFracPart > 0.25f)
{
return vertexIndicesZ[static_cast<uint16>(xIntPart)][static_cast<uint16>(yIntPart)][static_cast<uint16>(zIntPart)];
return vertexIndicesZ[xIntPart + yIntPart * regionDimensions.getX() + zIntPart * regionDimensions.getX() * regionDimensions.getY()];
}
while(true);
}
void setIndexFor(const Vector3DFloat& pos, int32 newIndex, int32 vertexIndicesX[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1], int32 vertexIndicesY[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1], int32 vertexIndicesZ[POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1][POLYVOX_REGION_SIDE_LENGTH+1])
void setIndexFor(const Vector3DFloat& pos, const Vector3DInt32& regionDimensions, int32 newIndex, std::vector<int32>& vertexIndicesX, std::vector<int32>& vertexIndicesY, std::vector<int32>& vertexIndicesZ)
{
assert(pos.getX() >= 0.0f);
assert(pos.getY() >= 0.0f);
@ -312,27 +320,29 @@ namespace PolyVox
assert(pos.getY() <= POLYVOX_REGION_SIDE_LENGTH);
assert(pos.getZ() <= POLYVOX_REGION_SIDE_LENGTH);
assert(newIndex < 10000);
float xIntPartAsFloat;
float xFracPart = std::modf(pos.getX(), &xIntPartAsFloat);
float yIntPartAsFloat;
float yFracPart = std::modf(pos.getY(), &yIntPartAsFloat);
float zIntPartAsFloat;
float zFracPart = std::modf(pos.getZ(), &zIntPartAsFloat);
float xIntPart;
float xFracPart = std::modf(pos.getX(), &xIntPart);
float yIntPart;
float yFracPart = std::modf(pos.getY(), &yIntPart);
float zIntPart;
float zFracPart = std::modf(pos.getZ(), &zIntPart);
uint16 xIntPart = static_cast<uint16>(xIntPartAsFloat);
uint16 yIntPart = static_cast<uint16>(yIntPartAsFloat);
uint16 zIntPart = static_cast<uint16>(zIntPartAsFloat);
//Of all the fractional parts, two should be zero and one should have a value.
if(xFracPart > 0.000001f)
//Of all the fractional parts, two should be zero and one should be 0.5.
if(xFracPart > 0.25f)
{
vertexIndicesX[static_cast<uint16>(xIntPart)][static_cast<uint16>(yIntPart)][static_cast<uint16>(zIntPart)] = newIndex;
vertexIndicesX[xIntPart + yIntPart * regionDimensions.getX() + zIntPart * regionDimensions.getX() * regionDimensions.getY()] = newIndex;
}
if(yFracPart > 0.000001f)
if(yFracPart > 0.25f)
{
vertexIndicesY[static_cast<uint16>(xIntPart)][static_cast<uint16>(yIntPart)][static_cast<uint16>(zIntPart)] = newIndex;
vertexIndicesY[xIntPart + yIntPart * regionDimensions.getX() + zIntPart * regionDimensions.getX() * regionDimensions.getY()] = newIndex;
}
if(zFracPart > 0.000001f)
if(zFracPart > 0.25f)
{
vertexIndicesZ[static_cast<uint16>(xIntPart)][static_cast<uint16>(yIntPart)][static_cast<uint16>(zIntPart)] = newIndex;
vertexIndicesZ[xIntPart + yIntPart * regionDimensions.getX() + zIntPart * regionDimensions.getX() * regionDimensions.getY()] = newIndex;
}
}
}

5
library/source/PolyVoxCore/Region.cpp
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@ -79,4 +79,9 @@ namespace PolyVox
{
m_v3dUpperCorner += amount;
}
Vector3DInt32 Region::dimensions(void)
{
return m_v3dUpperCorner - m_v3dLowerCorner;
}
}