Massive changes to the organisation of PolyVoxCore and PolyVoxYtil.

Also added start of logging capability.
2009-04-03 21:36:22 +00:00
parent dbf7257edd
commit df1bf690c9
222 changed files with 3353 additions and 186 deletions
--- a/library/PolyVoxCore/source/GradientEstimators.cpp
+++ b/library/PolyVoxCore/source/GradientEstimators.cpp
@ -0,0 +1,126 @@
+#include "GradientEstimators.h"
+#include "IndexedSurfacePatch.h"
+#include "SurfaceVertex.h"
+#include "PolyVoxImpl/TypeDef.h"
+
+using namespace std;
+
+namespace PolyVox
+{
+	void computeNormalsForVertices(Volume<uint8_t>* volumeData, IndexedSurfacePatch& isp, NormalGenerationMethod normalGenerationMethod)
+	{
+		std::vector<SurfaceVertex>& vecVertices = isp.getRawVertexData();
+		std::vector<SurfaceVertex>::iterator iterSurfaceVertex = vecVertices.begin();
+		while(iterSurfaceVertex != vecVertices.end())
+		{
+			const Vector3DFloat& v3dPos = iterSurfaceVertex->getPosition() + static_cast<Vector3DFloat>(isp.m_v3dRegionPosition);
+			const Vector3DInt32 v3dFloor = static_cast<Vector3DInt32>(v3dPos);
+
+			VolumeIterator<uint8_t> volIter(*volumeData);
+
+			//Check all corners are within the volume, allowing a boundary for gradient estimation
+			bool lowerCornerInside = volumeData->getEnclosingRegion().containsPoint(v3dFloor,2);
+			bool upperCornerInside = volumeData->getEnclosingRegion().containsPoint(v3dFloor+Vector3DInt32(1,1,1),2);
+
+			if(lowerCornerInside && upperCornerInside) //If this test fails the vertex will be left as it was
+			{
+				Vector3DFloat v3dGradient = computeNormal(volumeData, v3dPos, normalGenerationMethod);
+				
+				if(v3dGradient.lengthSquared() > 0.0001)
+				{
+					//If we got a normal of significant length then update it.
+					//Otherwise leave it as it was (should be the 'simple' version)
+					v3dGradient.normalise();
+					iterSurfaceVertex->setNormal(v3dGradient);
+				}
+			} //(lowerCornerInside && upperCornerInside)
+			++iterSurfaceVertex;
+		}
+	}
+
+	Vector3DFloat computeNormal(Volume<uint8_t>* volumeData, const Vector3DFloat& v3dPos, NormalGenerationMethod normalGenerationMethod)
+	{
+		Vector3DFloat v3dGradient; //To store the result
+
+		VolumeIterator<uint8_t> volIter(*volumeData);
+
+			const Vector3DInt32 v3dFloor = static_cast<Vector3DInt32>(v3dPos);
+
+			volIter.setPosition(static_cast<Vector3DInt16>(v3dFloor));
+			Vector3DFloat gradFloor;
+			switch(normalGenerationMethod)
+			{
+			case SOBEL_SMOOTHED:
+				gradFloor = computeSmoothSobelGradient(volIter);
+				break;
+			case CENTRAL_DIFFERENCE_SMOOTHED:
+				gradFloor = computeSmoothCentralDifferenceGradient(volIter);
+				break;
+			case SOBEL:
+				gradFloor = computeSobelGradient(volIter);
+				break;
+			case CENTRAL_DIFFERENCE:
+				gradFloor = computeCentralDifferenceGradient(volIter);
+				break;
+			}
+
+			if((v3dPos.getX() - v3dFloor.getX()) > 0.25) //The result should be 0.0 or 0.5
+			{			
+				volIter.setPosition(static_cast<Vector3DInt16>(v3dFloor+Vector3DInt32(1,0,0)));
+			}
+			if((v3dPos.getY() - v3dFloor.getY()) > 0.25) //The result should be 0.0 or 0.5
+			{			
+				volIter.setPosition(static_cast<Vector3DInt16>(v3dFloor+Vector3DInt32(0,1,0)));
+			}
+			if((v3dPos.getZ() - v3dFloor.getZ()) > 0.25) //The result should be 0.0 or 0.5
+			{			
+				volIter.setPosition(static_cast<Vector3DInt16>(v3dFloor+Vector3DInt32(0,0,1)));					
+			}
+
+			Vector3DFloat gradCeil;
+			switch(normalGenerationMethod)
+			{
+			case SOBEL_SMOOTHED:
+				gradCeil = computeSmoothSobelGradient(volIter);
+				break;
+			case CENTRAL_DIFFERENCE_SMOOTHED:
+				gradCeil = computeSmoothCentralDifferenceGradient(volIter);
+				break;
+			case SOBEL:
+				gradCeil = computeSobelGradient(volIter);
+				break;
+			case CENTRAL_DIFFERENCE:
+				gradCeil = computeCentralDifferenceGradient(volIter);
+				break;
+			}
+
+			v3dGradient = (gradFloor + gradCeil);
+			if(v3dGradient.lengthSquared() < 0.0001)
+			{
+				//Operation failed - fall back on simple gradient estimation
+				normalGenerationMethod = SIMPLE;
+			}
+
+			if(normalGenerationMethod == SIMPLE)
+			{
+				volIter.setPosition(static_cast<Vector3DInt16>(v3dFloor));
+				const uint8_t uFloor = volIter.getVoxel() > 0 ? 1 : 0;
+				if((v3dPos.getX() - v3dFloor.getX()) > 0.25) //The result should be 0.0 or 0.5
+				{					
+					uint8_t uCeil = volIter.peekVoxel1px0py0pz() > 0 ? 1 : 0;
+					v3dGradient = Vector3DFloat(static_cast<float>(uFloor - uCeil),0.0,0.0);
+				}
+				else if((v3dPos.getY() - v3dFloor.getY()) > 0.25) //The result should be 0.0 or 0.5
+				{
+					uint8_t uCeil = volIter.peekVoxel0px1py0pz() > 0 ? 1 : 0;
+					v3dGradient = Vector3DFloat(0.0,static_cast<float>(uFloor - uCeil),0.0);
+				}
+				else if((v3dPos.getZ() - v3dFloor.getZ()) > 0.25) //The result should be 0.0 or 0.5
+				{
+					uint8_t uCeil = volIter.peekVoxel0px0py1pz() > 0 ? 1 : 0;
+					v3dGradient = Vector3DFloat(0.0, 0.0,static_cast<float>(uFloor - uCeil));					
+				}
+			}
+			return v3dGradient;
+	}
+}