85 lines
4.2 KiB
C++
85 lines
4.2 KiB
C++
/*
|
|
* ICE / OPCODE - Optimized Collision Detection
|
|
* http://www.codercorner.com/Opcode.htm
|
|
*
|
|
* Copyright (c) 2001-2008 Pierre Terdiman, pierre@codercorner.com
|
|
|
|
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.
|
|
*/
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
/**
|
|
* Contains a handy indexed triangle class.
|
|
* \file IceIndexedTriangle.h
|
|
* \author Pierre Terdiman
|
|
* \date January, 17, 2000
|
|
*/
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Include Guard
|
|
#ifndef __ICEINDEXEDTRIANGLE_H__
|
|
#define __ICEINDEXEDTRIANGLE_H__
|
|
|
|
// Forward declarations
|
|
enum CubeIndex;
|
|
|
|
// An indexed triangle class.
|
|
class ICEMATHS_API IndexedTriangle
|
|
{
|
|
public:
|
|
//! Constructor
|
|
inline_ IndexedTriangle() {}
|
|
//! Constructor
|
|
inline_ IndexedTriangle(udword r0, udword r1, udword r2) { mVRef[0]=r0; mVRef[1]=r1; mVRef[2]=r2; }
|
|
//! Copy constructor
|
|
inline_ IndexedTriangle(const IndexedTriangle& triangle)
|
|
{
|
|
mVRef[0] = triangle.mVRef[0];
|
|
mVRef[1] = triangle.mVRef[1];
|
|
mVRef[2] = triangle.mVRef[2];
|
|
}
|
|
//! Destructor
|
|
inline_ ~IndexedTriangle() {}
|
|
//! Vertex-references
|
|
udword mVRef[3];
|
|
|
|
// Methods
|
|
void Flip();
|
|
float Area(const Point* verts) const;
|
|
float Perimeter(const Point* verts) const;
|
|
float Compacity(const Point* verts) const;
|
|
void Normal(const Point* verts, Point& normal) const;
|
|
void DenormalizedNormal(const Point* verts, Point& normal) const;
|
|
void Center(const Point* verts, Point& center) const;
|
|
void CenteredNormal(const Point* verts, Point& normal) const;
|
|
void RandomPoint(const Point* verts, Point& random) const;
|
|
bool IsVisible(const Point* verts, const Point& source) const;
|
|
bool BackfaceCulling(const Point* verts, const Point& source) const;
|
|
float ComputeOcclusionPotential(const Point* verts, const Point& view) const;
|
|
bool ReplaceVertex(udword oldref, udword newref);
|
|
bool IsDegenerate() const;
|
|
bool HasVertex(udword ref) const;
|
|
bool HasVertex(udword ref, udword* index) const;
|
|
ubyte FindEdge(udword vref0, udword vref1) const;
|
|
udword OppositeVertex(udword vref0, udword vref1) const;
|
|
inline_ udword OppositeVertex(ubyte edgenb) const { return mVRef[2-edgenb]; }
|
|
void GetVRefs(ubyte edgenb, udword& vref0, udword& vref1, udword& vref2) const;
|
|
float MinEdgeLength(const Point* verts) const;
|
|
float MaxEdgeLength(const Point* verts) const;
|
|
void ComputePoint(const Point* verts, float u, float v, Point& pt, udword* nearvtx=null) const;
|
|
float Angle(const IndexedTriangle& tri, const Point* verts) const;
|
|
inline_ Plane PlaneEquation(const Point* verts) const { return Plane(verts[mVRef[0]], verts[mVRef[1]], verts[mVRef[2]]); }
|
|
bool Equal(const IndexedTriangle& tri) const;
|
|
CubeIndex ComputeCubeIndex(const Point* verts) const;
|
|
};
|
|
|
|
#endif // __ICEINDEXEDTRIANGLE_H__
|