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// Geometric Tools, LLC
// Copyright (c) 1998-2017
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.16.0 (2017/08/24)
#ifndef WM5THPOINT_H
#define WM5THPOINT_H
#include "Wm5MathematicsLIB.h"
namespace Wm5
{
template <typename Real>
class THPoint
{
public:
// Construction and destruction. THPoint represents a homogeneous point
// of the form (x,y,z,w). Affine points are characterized by w = 1
// (see class TAPoint) and affine vectors are characterized by w = 0
// (see class TAVector). The default constructor does not initialize
// its members.
THPoint()
{
// uninitialized members
}
THPoint(const THPoint& pnt)
{
mTuple[0] = pnt.mTuple[0];
mTuple[1] = pnt.mTuple[1];
mTuple[2] = pnt.mTuple[2];
mTuple[3] = pnt.mTuple[3];
}
THPoint(Real x, Real y, Real z, Real w)
{
mTuple[0] = x;
mTuple[1] = y;
mTuple[2] = z;
mTuple[3] = w;
}
~THPoint()
{
}
// Coordinate access.
inline operator const Real*() const
{
return mTuple;
}
inline operator Real*()
{
return mTuple;
}
inline const Real& operator[] (int i) const
{
return mTuple[i];
}
inline Real& operator[] (int i)
{
return mTuple[i];
}
inline Real X() const
{
return mTuple[0];
}
inline Real& X()
{
return mTuple[0];
}
inline Real Y() const
{
return mTuple[1];
}
inline Real& Y()
{
return mTuple[1];
}
inline Real Z() const
{
return mTuple[2];
}
inline Real& Z()
{
return mTuple[2];
}
inline Real W() const
{
return mTuple[3];
}
inline Real& W()
{
return mTuple[3];
}
// Assignment.
THPoint& operator= (const THPoint& pnt)
{
mTuple[0] = pnt.mTuple[0];
mTuple[1] = pnt.mTuple[1];
mTuple[2] = pnt.mTuple[2];
mTuple[3] = pnt.mTuple[3];
return *this;
}
// Comparison (for use by STL containers).
bool operator== (const THPoint& pnt) const
{
for (int i = 0; i < 4; ++i)
{
if (mTuple[i] != pnt.mTuple[i])
{
return false;
}
}
return true;
}
bool operator!= (const THPoint& pnt) const
{
return !operator==(pnt);
}
bool operator< (const THPoint& pnt) const
{
// lexicographical ordering
for (int i = 0; i < 4; ++i)
{
if (mTuple[i] < pnt.mTuple[i])
{
return true;
}
if (mTuple[i] > pnt.mTuple[i])
{
return false;
}
}
return false;
}
bool operator<= (const THPoint& pnt) const
{
// (x <= y) <=> !(y < x)
return !(pnt.operator<(*this));
}
bool operator> (const THPoint& pnt) const
{
// (x > y) <=> (y < x)
return pnt.operator<(*this);
}
bool operator>= (const THPoint& pnt) const
{
// (x >= y) <=> !(x < y)
return !operator<(pnt);
}
protected:
Real mTuple[4];
};
}
#endif
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