TransformMatrix.h

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/* -*- mode: c++ -*- */
#ifndef BOARD_TRANSFORM_MATRIX_H
#define BOARD_TRANSFORM_MATRIX_H
 
#include <board/Point.h>
#include <cmath>
#include <iostream>
 
namespace LibBoard
{
 
class TransformMatrix {
public:
  enum Type
  {
    SVG,
    Postscript
  };
 
  inline TransformMatrix();
  inline TransformMatrix(double m11, double m12, double m13, double m21, double m22, double m23);
 
  static TransformMatrix translation(double dx, double dy);
  static TransformMatrix translation(const Point &);
  static TransformMatrix scaling(double sx, double sy);
  static TransformMatrix rotation(double angle, Type type);
  static TransformMatrix rotation(double angle, const Point & center, Type type);
 
  TransformMatrix operator*(const TransformMatrix &) const;
  TransformMatrix & operator*=(const TransformMatrix &);
  Point operator*(const Point & point) const;
  TransformMatrix operator+(const Point &) const;
  TransformMatrix & operator+=(const Point &);
  void flushSVG(std::ostream &) const;
  void flushEPS(std::ostream &) const;
 
private:
  double _m11, _m12, _m13;
  double _m21, _m22, _m23;
};
 
// inline methods
 
TransformMatrix::TransformMatrix()
{
  _m11 = 1.0;
  _m12 = 0.0;
  _m13 = 0.0;
  _m21 = 0.0;
  _m22 = 1.0;
  _m23 = 0.0;
}
 
TransformMatrix::TransformMatrix(double m11, double m12, double m13, double m21, double m22, double m23) : _m11(m11), _m12(m12), _m13(m13), _m21(m21), _m22(m22), _m23(m23) {}
 
} // namespace LibBoard
 
#endif /* BOARD_TRANSFORM_MATRIX_H */