81 lines
3.4 KiB
C++
81 lines
3.4 KiB
C++
/*******************************************************************************
|
|
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, and does so by storing and returning both a material
|
|
/// and a density value. Via the template parameters it is possible to control how much
|
|
/// precision is given to each. For example, if you create a class with 8 bits of storage,
|
|
/// you might choose to allocate 6 bits for the density and 2 bits for the material.
|
|
///
|
|
/// \sa Density, Material
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
template <typename Type, uint8_t NoOfMaterialBits, uint8_t NoOfDensityBits>
|
|
class MaterialDensityPair
|
|
{
|
|
public:
|
|
MaterialDensityPair() : m_uMaterial(0), m_uDensity(0) {}
|
|
MaterialDensityPair(Type uMaterial, Type uDensity) : m_uMaterial(uMaterial), m_uDensity(uDensity) {}
|
|
|
|
bool operator==(const MaterialDensityPair& rhs) const throw()
|
|
{
|
|
return (m_uMaterial == rhs.m_uMaterial) && (m_uDensity == rhs.m_uDensity);
|
|
};
|
|
|
|
bool operator!=(const MaterialDensityPair& rhs) const throw()
|
|
{
|
|
return !(*this == rhs);
|
|
}
|
|
|
|
Type getDensity() const throw() { return m_uDensity; }
|
|
Type getMaterial() const throw() { return m_uMaterial; }
|
|
|
|
void setDensity(Type uDensity) { m_uDensity = uDensity; }
|
|
void setMaterial(Type uMaterial) { m_uMaterial = uMaterial; }
|
|
|
|
static Type getMaxDensity() throw() { return (0x01 << NoOfDensityBits) - 1; }
|
|
static Type getMinDensity() throw() { return 0; }
|
|
static Type getThreshold() throw() {return 0x01 << (NoOfDensityBits - 1);}
|
|
|
|
private:
|
|
Type m_uMaterial : NoOfMaterialBits;
|
|
Type m_uDensity : NoOfDensityBits;
|
|
};
|
|
|
|
typedef MaterialDensityPair<uint8_t, 4, 4> MaterialDensityPair44;
|
|
}
|
|
|
|
#endif |