src/point.cpp (5dbde65) - dxfngc · BlinkenArea

point.cpp

/* drawing (DXF) to G-code (NGC) converter
 * Copyright 2013 Stefan Schuermans <stefan@schuermans.info>
 * Copyleft: GNU public license - http://www.gnu.org/copyleft/gpl.html
 */

#include <math.h>

#include "point.h"

Point::Point():
  mX(0.0),
  mY(0.0)
{
}

Point::Point(double x, double y):
  mX(x),
  mY(y)
{
}

double Point::abs_sq() const
{
  return mX * mX + mY * mY;
}

double Point::abs() const
{
  return sqrt(mX * mX + mY * mY);
}

Point Point::operator-() const
{
  return Point(-mX, -mY);
}

Point Point::operator+(const Point &that) const
{
  return Point(mX + that.mX, mY + that.mY);
}

Point Point::operator-(const Point &that) const
{
  return Point(mX - that.mX, mY - that.mY);
}

Point Point::operator*(double factor) const
{
  return Point(mX * factor, mY * factor);
}

Point Point::operator/(double factor) const
{
  return Point(mX / factor, mY / factor);
}

Point &Point::operator+=(const Point &that)
{
  mX += that.mX;
  mY += that.mY;
  return *this;
}

Point &Point::operator-=(const Point &that)
{
  mX -= that.mX;
  mY -= that.mY;
  return *this;
}

Point &Point::operator*=(double factor)
{
  mX *= factor;
  mY *= factor;
  return *this;
}

Point &Point::operator/=(double factor)
{
  mX /= factor;
  mY /= factor;
  return *this;
}

/**
 * @brief check if point is equal to another one
 * @param[in] that other point
 * @param[in] eqDist maximum distance of two points to be considered equal
 */
bool Point::equals(const Point &that, double eqDist) const
{
  return (*this - that).abs_sq() <= eqDist * eqDist;
}

/**
 * @brief rotate around origin
 * @param[in] rad angle in radians
 * @return rotated point
 */
Point Point::rotate(double rad) const
{
  double c = cos(rad);
  double s = sin(rad);
  double rx = mX * c - mY * s;
  double ry = mY * c + mX * s;
  return Point(rx, ry);
}

/**
 * @brief scale differently in X and Y direction
 * @param[in] fx scale factor in X direction
 * @param[in] fy scale factor in Y direction
 * @return scaled point
 */
Point Point::scale_xy(double fx, double fy) const
{
  return Point(fx * mX, fy * mY);
}

dxfngc

implement scaling