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