Added Material8 and Density8 classes, and Thermite now uses the Material8 one.

library/PolyVoxCore/include/Density.h

@@ -0,0 +1,88 @@
+/*******************************************************************************
+Copyright (c) 2005-2009 David Williams
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must not
+    claim that you wrote the original software. If you use this software
+    in a product, an acknowledgment in the product documentation would be
+    appreciated but is not required.
+
+    2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as being the original software.
+
+    3. This notice may not be removed or altered from any source
+    distribution. 	
+*******************************************************************************/
+
+#ifndef __PolyVox_MaterialDensityPair_H__
+#define __PolyVox_MaterialDensityPair_H__
+
+#include "PolyVoxForwardDeclarations.h"
+#include "PolyVoxImpl/TypeDef.h"
+
+namespace PolyVox
+{
+	///This class represents a voxel storing only a density.
+	////////////////////////////////////////////////////////////////////////////////
+	/// In order to perform a surface extraction on a Volume, PolyVox needs the underlying
+	/// voxel type to provide both getDensity() and getMaterial() functions. The getDensity()
+	/// function is used to determine if a voxel is 'solid', and if it is then the getMaterial()
+	/// funtion is used to determine what material should be assigned to the resulting mesh.
+	///
+	/// This class meets these requirements, although it only actually stores a density value.
+	/// For the getMaterial() function it just returens a constant value of '1'.
+	///
+	/// \sa Material, MaterialDensityPair
+	////////////////////////////////////////////////////////////////////////////////
+	template <typename Type>
+	class Density
+	{
+	public:
+		Density() : m_uDensity(0) {}
+		Density(Type uDensity) : m_uDensity(uDensity) {}
+
+		bool operator==(const Density& rhs) const throw()
+		{
+			return (m_uDensity == rhs.m_uDensity);
+		};
+
+		bool operator!=(const Density& rhs) const throw()
+		{
+			return !(*this == rhs);
+		}
+
+		bool operator<(const Density& rhs) const throw()
+		{
+			if (m_uDensity < rhs.m_uDensity)
+				return true;
+			if (rhs.m_uDensity < m_uDensity)
+				return false;
+
+			return false;
+		}
+
+		Type getDensity() const throw() { return m_uDensity; }
+		Type getMaterial() const throw() { return 1; }
+
+		void setDensity(Type uDensity) { m_uDensity = uDensity; }
+		void setMaterial(Type uMaterial) { assert("Cannot set material on voxel of type 'Density'"); }
+
+		static Type getMaxDensity() throw() { return (0x01 << (sizeof(Type) * 8)) - 1; } 
+		static Type getMinDensity() throw() { return 0; }
+		static Type getThreshold() throw() {return  0x01 << ((sizeof(Type) * 8) - 1);}
+
+	private:
+		Type m_uDensity;
+	};
+
+	typedef Density<uint8_t> Density8;
+}
+
+#endif