neofx-zoomedit/Vertex.cpp

#include "Vertex.h"
#include <math.h>

float Vertex::distanceSq(const Vertex &v) const {
  return (x - v.x)*(x - v.x) + (y - v.y)*(y - v.y);
}

float Vertex::distance(const Vertex &v) const {
  return sqrtf(distanceSq(v));
}


Vertex Vertex::operator+(const Vertex &v) const {
  return Vertex(x + v.x, y + v.y);
}

Vertex Vertex::operator-(const Vertex &v) const {
  return Vertex(x - v.x, y - v.y);
}

Vertex& Vertex::operator+=(const Vertex &v) {
  x += v.x;
  y += v.y;
  
  return *this;
}

Vertex& Vertex::operator-=(const Vertex &v) {
  x -= v.x;
  y -= v.y;
  
  return *this;
}