Massive changes to the organisation of PolyVoxCore and PolyVoxYtil.

Also added start of logging capability.

library/PolyVoxCore/include/GradientEstimators.h

@@ -0,0 +1,60 @@
+#pragma region License
+/******************************************************************************
+This file is part of the PolyVox library
+Copyright (C) 2006  David Williams
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+******************************************************************************/
+#pragma endregion
+
+#ifndef __PolyVox_GradientEstimators_H__
+#define __PolyVox_GradientEstimators_H__
+
+#include "VolumeIterator.h"
+
+#include <vector>
+
+namespace PolyVox
+{
+	enum NormalGenerationMethod
+	{
+		SIMPLE, ///<Fastest
+		CENTRAL_DIFFERENCE,
+		SOBEL,
+		CENTRAL_DIFFERENCE_SMOOTHED,
+		SOBEL_SMOOTHED ///<Smoothest
+	};
+
+	template <typename VoxelType>
+	Vector3DFloat computeCentralDifferenceGradient(const VolumeIterator<VoxelType>& volIter);
+
+	template <typename VoxelType>
+	Vector3DFloat computeSmoothCentralDifferenceGradient(VolumeIterator<VoxelType>& volIter);
+
+	template <typename VoxelType>
+	Vector3DFloat computeDecimatedCentralDifferenceGradient(VolumeIterator<VoxelType>& volIter);
+
+	template <typename VoxelType>
+	Vector3DFloat computeSobelGradient(const VolumeIterator<VoxelType>& volIter);
+	template <typename VoxelType>
+	Vector3DFloat computeSmoothSobelGradient(VolumeIterator<VoxelType>& volIter);
+
+	POLYVOXCORE_API void computeNormalsForVertices(Volume<uint8_t>* volumeData, IndexedSurfacePatch& isp, NormalGenerationMethod normalGenerationMethod);
+	POLYVOXCORE_API Vector3DFloat computeNormal(Volume<uint8_t>* volumeData, const Vector3DFloat& v3dPos, NormalGenerationMethod normalGenerationMethod);
+}
+
+#include "GradientEstimators.inl"
+
+#endif //__PolyVox_GradientEstimators_H__