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Work adding normals to marching cubes reference implementation.

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This commit is contained in:
David Williams 2008-06-27 18:10:18 +00:00
parent b990efce24
commit 3ce8e42551
4 changed files with 64 additions and 42 deletions
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12
PolyVoxCore/include/SurfaceVertex.h
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@ -31,18 +31,13 @@ namespace PolyVox
{
public:
SurfaceVertex();
SurfaceVertex(Vector3DFloat positionToSet, float materialToSet, float alphaToSet);
SurfaceVertex(Vector3DFloat positionToSet, Vector3DFloat normalToSet, float materialToSet, float alphaToSet);
SurfaceVertex(Vector3DFloat positionToSet, float materialToSet);
SurfaceVertex(Vector3DFloat positionToSet, Vector3DFloat normalToSet, float materialToSet);
friend bool operator==(const SurfaceVertex& lhs, const SurfaceVertex& rhs);
friend bool operator < (const SurfaceVertex& lhs, const SurfaceVertex& rhs);
float getAlpha(void) const;
float getMaterial(void) const;
const Vector3DFloat& getNormal(void) const;
const Vector3DFloat& getPosition(void) const;
void setAlpha(float alphaToSet);
void setMaterial(float materialToSet);
void setNormal(const Vector3DFloat& normalToSet);
void setPosition(const Vector3DFloat& positionToSet);
@ -53,7 +48,6 @@ namespace PolyVox
Vector3DFloat position;
Vector3DFloat normal;
float material;
float alpha;
};

62
PolyVoxCore/source/SurfaceExtractors.cpp
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@ -30,14 +30,14 @@ namespace PolyVox
regionGeometry.m_patchSingleMaterial = new IndexedSurfacePatch(false);
regionGeometry.m_v3dRegionPosition = iterChangedRegions->getLowerCorner();
generateDecimatedMeshDataForRegion(volume.getVolumeData(), 0, *iterChangedRegions, regionGeometry.m_patchSingleMaterial);
//generateDecimatedMeshDataForRegion(volume.getVolumeData(), 0, *iterChangedRegions, regionGeometry.m_patchSingleMaterial);
//generateReferenceMeshDataForRegion(volume.getVolumeData(), *iterChangedRegions, regionGeometry.m_patchSingleMaterial);
generateReferenceMeshDataForRegion(volume.getVolumeData(), *iterChangedRegions, regionGeometry.m_patchSingleMaterial);
//for(int ct = 0; ct < 2; ct++)
Vector3DInt32 temp = regionGeometry.m_v3dRegionPosition;
//temp /= 16;
if(temp.getY() % 32 == 0)
/*if(temp.getY() % 32 == 0)
{
//smoothRegionGeometry(volume.getVolumeData(), regionGeometry);
generateDecimatedMeshDataForRegion(volume.getVolumeData(), 0, *iterChangedRegions, regionGeometry.m_patchSingleMaterial);
@ -46,7 +46,7 @@ namespace PolyVox
{
generateDecimatedMeshDataForRegion(volume.getVolumeData(), 1, *iterChangedRegions, regionGeometry.m_patchSingleMaterial);
//adjustDecimatedGeometry(volume.getVolumeData(), regionGeometry, 1);
}
}*/
//computeNormalsForVertices(volume.getVolumeData(), regionGeometry, CENTRAL_DIFFERENCE);
@ -442,7 +442,7 @@ namespace PolyVox
const Vector3DFloat v3dPosition(x + 0.5f, y, z);
const Vector3DFloat v3dNormal(v000 > v100 ? 1.0f : -1.0f, 0.0f, 0.0f);
const uint8_t uMaterial = v000 | v100; //Because one of these is 0, the or operation takes the max.
const SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial, 1.0);
const SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
singleMaterialPatch->m_vecVertices.push_back(surfaceVertex);
vertexIndicesX[getIndex(x,y)] = singleMaterialPatch->m_vecVertices.size()-1;
}
@ -455,7 +455,7 @@ namespace PolyVox
const Vector3DFloat v3dPosition(x, y + 0.5f, z);
const Vector3DFloat v3dNormal(0.0f, v000 > v010 ? 1.0f : -1.0f, 0.0f);
const uint8_t uMaterial = v000 | v010;
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial, 1.0);
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
singleMaterialPatch->m_vecVertices.push_back(surfaceVertex);
vertexIndicesY[getIndex(x,y)] = singleMaterialPatch->m_vecVertices.size()-1;
}
@ -468,7 +468,7 @@ namespace PolyVox
const Vector3DFloat v3dPosition(x, y, z + 0.5f);
const Vector3DFloat v3dNormal(0.0f, 0.0f, v000 > v001 ? 1.0f : -1.0f);
const uint8_t uMaterial = v000 | v001;
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial, 1.0);
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
singleMaterialPatch->m_vecVertices.push_back(surfaceVertex);
vertexIndicesZ[getIndex(x,y)] = singleMaterialPatch->m_vecVertices.size()-1;
}
@ -589,6 +589,7 @@ namespace PolyVox
const Vector3DFloat offset = static_cast<Vector3DFloat>(region.getLowerCorner());
Vector3DFloat vertlist[12];
Vector3DFloat normlist[12];
uint8_t vertMaterials[12];
BlockVolumeIterator<std::uint8_t> volIter(*volumeData);
volIter.setValidRegion(region);
@ -640,6 +641,9 @@ namespace PolyVox
vertlist[0].setX(x + 0.5f);
vertlist[0].setY(y);
vertlist[0].setZ(z);
normlist[0].setX(v000 > v100 ? 1.0f : -1.0f);
normlist[0].setY(0.0f);
normlist[0].setZ(0.0f);
vertMaterials[0] = v000 | v100; //Because one of these is 0, the or operation takes the max.
}
if (edgeTable[iCubeIndex] & 2)
@ -647,6 +651,9 @@ namespace PolyVox
vertlist[1].setX(x + 1.0f);
vertlist[1].setY(y + 0.5f);
vertlist[1].setZ(z);
normlist[1].setX(0.0f);
normlist[1].setY(v100 > v110 ? 1.0f : -1.0f);
normlist[1].setZ(0.0f);
vertMaterials[1] = v100 | v110;
}
if (edgeTable[iCubeIndex] & 4)
@ -654,6 +661,9 @@ namespace PolyVox
vertlist[2].setX(x + 0.5f);
vertlist[2].setY(y + 1.0f);
vertlist[2].setZ(z);
normlist[2].setX(v010 > v110 ? 1.0f : -1.0f);
normlist[2].setY(0.0f);
normlist[2].setZ(0.0f);
vertMaterials[2] = v010 | v110;
}
if (edgeTable[iCubeIndex] & 8)
@ -661,6 +671,9 @@ namespace PolyVox
vertlist[3].setX(x);
vertlist[3].setY(y + 0.5f);
vertlist[3].setZ(z);
normlist[3].setX(0.0f);
normlist[3].setY(v000 > v010 ? 1.0f : -1.0f);
normlist[3].setZ(0.0f);
vertMaterials[3] = v000 | v010;
}
if (edgeTable[iCubeIndex] & 16)
@ -668,6 +681,9 @@ namespace PolyVox
vertlist[4].setX(x + 0.5f);
vertlist[4].setY(y);
vertlist[4].setZ(z + 1.0f);
normlist[4].setX(v001 > v101 ? 1.0f : -1.0f);
normlist[4].setY(0.0f);
normlist[4].setZ(0.0f);
vertMaterials[4] = v001 | v101;
}
if (edgeTable[iCubeIndex] & 32)
@ -675,6 +691,9 @@ namespace PolyVox
vertlist[5].setX(x + 1.0f);
vertlist[5].setY(y + 0.5f);
vertlist[5].setZ(z + 1.0f);
normlist[5].setX(0.0f);
normlist[5].setY(v101 > v111 ? 1.0f : -1.0f);
normlist[5].setZ(0.0f);
vertMaterials[5] = v101 | v111;
}
if (edgeTable[iCubeIndex] & 64)
@ -682,6 +701,9 @@ namespace PolyVox
vertlist[6].setX(x + 0.5f);
vertlist[6].setY(y + 1.0f);
vertlist[6].setZ(z + 1.0f);
normlist[6].setX(v011 > v111 ? 1.0f : -1.0f);
normlist[6].setY(0.0f);
normlist[6].setZ(0.0f);
vertMaterials[6] = v011 | v111;
}
if (edgeTable[iCubeIndex] & 128)
@ -689,6 +711,9 @@ namespace PolyVox
vertlist[7].setX(x);
vertlist[7].setY(y + 0.5f);
vertlist[7].setZ(z + 1.0f);
normlist[7].setX(0.0f);
normlist[7].setY(v001 > v011 ? 1.0f : -1.0f);
normlist[7].setZ(0.0f);
vertMaterials[7] = v001 | v011;
}
if (edgeTable[iCubeIndex] & 256)
@ -696,6 +721,9 @@ namespace PolyVox
vertlist[8].setX(x);
vertlist[8].setY(y);
vertlist[8].setZ(z + 0.5f);
normlist[8].setX(0.0f);
normlist[8].setY(0.0f);
normlist[8].setZ(v000 > v001 ? 1.0f : -1.0f);
vertMaterials[8] = v000 | v001;
}
if (edgeTable[iCubeIndex] & 512)
@ -703,6 +731,9 @@ namespace PolyVox
vertlist[9].setX(x + 1.0f);
vertlist[9].setY(y);
vertlist[9].setZ(z + 0.5f);
normlist[9].setX(0.0f);
normlist[9].setY(0.0f);
normlist[9].setZ(v100 > v101 ? 1.0f : -1.0f);
vertMaterials[9] = v100 | v101;
}
if (edgeTable[iCubeIndex] & 1024)
@ -710,6 +741,9 @@ namespace PolyVox
vertlist[10].setX(x + 1.0f);
vertlist[10].setY(y + 1.0f);
vertlist[10].setZ(z + 0.5f);
normlist[10].setX(0.0f);
normlist[10].setY(0.0f);
normlist[10].setZ(v110 > v111 ? 1.0f : -1.0f);
vertMaterials[10] = v110 | v111;
}
if (edgeTable[iCubeIndex] & 2048)
@ -717,6 +751,9 @@ namespace PolyVox
vertlist[11].setX(x);
vertlist[11].setY(y + 1.0f);
vertlist[11].setZ(z + 0.5f);
normlist[11].setX(0.0f);
normlist[11].setY(0.0f);
normlist[11].setZ(v010 > v011 ? 1.0f : -1.0f);
vertMaterials[11] = v010 | v011;
}
@ -727,6 +764,10 @@ namespace PolyVox
const Vector3DFloat vertex1 = vertlist[triTable[iCubeIndex][i+1]] - offset;
const Vector3DFloat vertex2 = vertlist[triTable[iCubeIndex][i+2]] - offset;
const Vector3DFloat normal0 = normlist[triTable[iCubeIndex][i ]];
const Vector3DFloat normal1 = normlist[triTable[iCubeIndex][i+1]];
const Vector3DFloat normal2 = normlist[triTable[iCubeIndex][i+2]];
//Cast to floats and divide by two.
//const Vector3DFloat vertex0AsFloat = (static_cast<Vector3DFloat>(vertex0) / 2.0f) - offset;
//const Vector3DFloat vertex1AsFloat = (static_cast<Vector3DFloat>(vertex1) / 2.0f) - offset;
@ -736,11 +777,10 @@ namespace PolyVox
const uint8_t material1 = vertMaterials[triTable[iCubeIndex][i+1]];
const uint8_t material2 = vertMaterials[triTable[iCubeIndex][i+2]];
//If all the materials are the same, we just need one triangle for that material with all the alphas set high.
SurfaceVertex surfaceVertex0Alpha1(vertex0,material0 + 0.1f,1.0f);
SurfaceVertex surfaceVertex1Alpha1(vertex1,material1 + 0.1f,1.0f);
SurfaceVertex surfaceVertex2Alpha1(vertex2,material2 + 0.1f,1.0f);
SurfaceVertex surfaceVertex0Alpha1(vertex0, normal0, material0 + 0.1f);
SurfaceVertex surfaceVertex1Alpha1(vertex1, normal1, material1 + 0.1f);
SurfaceVertex surfaceVertex2Alpha1(vertex2, normal2, material2 + 0.1f);
singleMaterialPatch->addTriangle(surfaceVertex0Alpha1, surfaceVertex1Alpha1, surfaceVertex2Alpha1);
}//For each triangle
}//For each cell

12
PolyVoxCore/source/SurfaceExtractorsDecimated.cpp
View File

@ -439,7 +439,7 @@ namespace PolyVox
const Vector3DFloat v3dPosition(x - offset.getX() + 0.5f * uStepSize, y - offset.getY(), z - offset.getZ());
const Vector3DFloat v3dNormal(v000 > v100 ? 1.0f : -1.0f,0.0,0.0);
const uint8_t uMaterial = v000 | v100; //Because one of these is 0, the or operation takes the max.
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial, 1.0);
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
singleMaterialPatch->m_vecVertices.push_back(surfaceVertex);
vertexIndicesX[getDecimatedIndex(x - offset.getX(),y - offset.getY())] = singleMaterialPatch->m_vecVertices.size()-1;
}
@ -453,7 +453,7 @@ namespace PolyVox
const Vector3DFloat v3dPosition(x - offset.getX(), y - offset.getY() + 0.5f * uStepSize, z - offset.getZ());
const Vector3DFloat v3dNormal(0.0,v000 > v010 ? 1.0f : -1.0f,0.0);
const uint8_t uMaterial = v000 | v010; //Because one of these is 0, the or operation takes the max.
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial, 1.0);
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
singleMaterialPatch->m_vecVertices.push_back(surfaceVertex);
vertexIndicesY[getDecimatedIndex(x - offset.getX(),y - offset.getY())] = singleMaterialPatch->m_vecVertices.size()-1;
}
@ -467,7 +467,7 @@ namespace PolyVox
const Vector3DFloat v3dPosition(x - offset.getX(), y - offset.getY(), z - offset.getZ() + 0.5f * uStepSize);
const Vector3DFloat v3dNormal(0.0,0.0,v000 > v001 ? 1.0f : -1.0f);
const uint8_t uMaterial = v000 | v001; //Because one of these is 0, the or operation takes the max.
const SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial, 1.0);
const SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
singleMaterialPatch->m_vecVertices.push_back(surfaceVertex);
vertexIndicesZ[getDecimatedIndex(x - offset.getX(),y - offset.getY())] = singleMaterialPatch->m_vecVertices.size()-1;
}
@ -768,11 +768,11 @@ namespace PolyVox
//If all the materials are the same, we just need one triangle for that material with all the alphas set high.
SurfaceVertex surfaceVertex0Alpha1(vertex0,material0 + 0.1f,1.0f);
SurfaceVertex surfaceVertex0Alpha1(vertex0,material0 + 0.1f);
surfaceVertex0Alpha1.setNormal(normal0);
SurfaceVertex surfaceVertex1Alpha1(vertex1,material1 + 0.1f,1.0f);
SurfaceVertex surfaceVertex1Alpha1(vertex1,material1 + 0.1f);
surfaceVertex1Alpha1.setNormal(normal1);
SurfaceVertex surfaceVertex2Alpha1(vertex2,material2 + 0.1f,1.0f);
SurfaceVertex surfaceVertex2Alpha1(vertex2,material2 + 0.1f);
surfaceVertex2Alpha1.setNormal(normal2);
singleMaterialPatch->addTriangle(surfaceVertex0Alpha1, surfaceVertex1Alpha1, surfaceVertex2Alpha1);
}//For each triangle

20
PolyVoxCore/source/SurfaceVertex.cpp
View File

@ -30,27 +30,20 @@ namespace PolyVox
{
}
SurfaceVertex::SurfaceVertex(Vector3DFloat positionToSet, float materialToSet, float alphaToSet)
:material(materialToSet)
,alpha(alphaToSet)
,position(positionToSet)
SurfaceVertex::SurfaceVertex(Vector3DFloat positionToSet, float materialToSet)
:position(positionToSet)
,material(materialToSet)
{
}
SurfaceVertex::SurfaceVertex(Vector3DFloat positionToSet, Vector3DFloat normalToSet, float materialToSet, float alphaToSet)
SurfaceVertex::SurfaceVertex(Vector3DFloat positionToSet, Vector3DFloat normalToSet, float materialToSet)
:position(positionToSet)
,normal(normalToSet)
,material(materialToSet)
,alpha(alphaToSet)
{
}
float SurfaceVertex::getAlpha(void) const
{
return alpha;
}
float SurfaceVertex::getMaterial(void) const
{
return material;
@ -66,11 +59,6 @@ namespace PolyVox
return position;
}
void SurfaceVertex::setAlpha(float alphaToSet)
{
alpha = alphaToSet;
}
void SurfaceVertex::setMaterial(float materialToSet)
{
material = materialToSet;