118 lines
1.6 KiB
C++
118 lines
1.6 KiB
C++
#include "point3d.hh"
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/* *** Constructors *** */
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Point3D::Point3D(const float &_x, const float &_y, const float &_z)
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{
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x = _x ;
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y = _y ;
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z = _z ;
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}
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Point3D::Point3D(const Point3D &p)
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{
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x = p.x ;
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y = p.y ;
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z = p.z ;
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}
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Point3D::Point3D(const float c[3])
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{
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x = c[0] ;
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y = c[1] ;
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z = c[2] ;
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}
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/* *** Distance operations *** */
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/**
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* The distance is not square rooted after the computation, in order
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* to optimise comparisons.
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*/
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float Point3D::square_distance(const Point3D &p) const
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{
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return
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(x - p.x) * (x - p.x) +
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(y - p.y) * (y - p.y) +
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(z - p.z) * (z - p.z) ;
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}
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/**
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* The distance is not square rooted after the computation, in order
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* to optimise comparisons.
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*/
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float Point3D::square_distance(const float &_x,
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const float &_y,
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const float &_z) const
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{
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return
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(x - _x) * (x - _x) +
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(y - _y) * (y - _y) +
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(z - _z) * (z - _z) ;
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}
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/* *** Operators *** */
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const Point3D& Point3D::operator=(const Point3D &p)
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{
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if (this == &p)
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return *this ;
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x = p.x ;
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y = p.y ;
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z = p.z ;
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return *this ;
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}
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bool Point3D::operator==(const Point3D &p) const
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{
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if (this == &p)
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return true ;
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return
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x == p.x &&
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y == p.y &&
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z == p.z ;
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}
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bool Point3D::operator<(const Point3D &p) const
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{
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if (x < p.x)
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return true ;
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if (x > p.x)
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return false ;
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if (y < p.y)
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return true ;
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if (y > p.y)
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return false ;
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if (z < p.z)
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return true ;
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return false ;
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}
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std::ostream& operator<<(std::ostream &os, const Point3D &p)
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{
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os << "(" << p.x << ";" << p.y << ";" << p.z << ")" ;
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return os ;
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}
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