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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Contains a handy triangle class.
* \file IceTriangle.h
* \author Pierre Terdiman
* \date January, 17, 2000
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Include Guard
#ifndef __ICETRIANGLE_H__
#define __ICETRIANGLE_H__
// Forward declarations
class Moment;
// Partitioning values
enum PartVal
{
TRI_MINUS_SPACE = 0, //!< Triangle is in the negative space
TRI_PLUS_SPACE = 1, //!< Triangle is in the positive space
TRI_INTERSECT = 2, //!< Triangle intersects plane
TRI_ON_PLANE = 3, //!< Triangle and plane are coplanar
TRI_FORCEDWORD = 0x7fffffff
};
// A triangle class.
class ICEMATHS_API Triangle
{
public:
//! Constructor
inline_ Triangle() {}
//! Constructor
inline_ Triangle(const IcePoint& p0, const IcePoint& p1, const IcePoint& p2) { mVerts[0]=p0; mVerts[1]=p1; mVerts[2]=p2; }
//! Copy constructor
inline_ Triangle(const Triangle& triangle)
{
mVerts[0] = triangle.mVerts[0];
mVerts[1] = triangle.mVerts[1];
mVerts[2] = triangle.mVerts[2];
}
//! Destructor
inline_ ~Triangle() {}
//! Vertices
IcePoint mVerts[3];
// Methods
void Flip();
float Area() const;
float Perimeter() const;
float Compacity() const;
void Normal(IcePoint& normal) const;
void DenormalizedNormal(IcePoint& normal) const;
void Center(IcePoint& center) const;
inline_ IcePlane PlaneEquation() const { return IcePlane(mVerts[0], mVerts[1], mVerts[2]); }
PartVal TestAgainstPlane(const IcePlane& plane, float epsilon) const;
// float Distance(IcePoint& cp, IcePoint& cq, Tri& tri);
void ComputeMoment(Moment& m);
float MinEdgeLength() const;
float MaxEdgeLength() const;
void ComputePoint(float u, float v, IcePoint& pt, udword* nearvtx=null) const;
void Inflate(float fat_coeff, bool constant_border);
};
#endif // __ICETRIANGLE_H__
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