KEYTransformation.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
 * This file is part of the libetonyek project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
#ifndef KEYTRANSFORMATION_H_INCLUDED
#define KEYTRANSFORMATION_H_INCLUDED
 
#include "libetonyek_utils.h"
 
namespace libetonyek
{
 
struct KEYGeometry;
 
class KEYTransformation
{
public:
  KEYTransformation();
 
  KEYTransformation(double xx, double yx, double xy, double yy, double x0, double y0);
 
  KEYTransformation &operator*=(const KEYTransformation &tr);
 
  void operator()(double &x, double &y, bool distance = false) const;
 
  bool approxEqual(const KEYTransformation &other, double eps = KEY_EPSILON) const;
 
private:
  // transformation matrix
  double m_xx;
  double m_yx;
  double m_xy;
  double m_yy;
  double m_x0;
  double m_y0;
};
 
KEYTransformation operator*(const KEYTransformation &left, const KEYTransformation &right);
 
bool operator==(const KEYTransformation &left, const KEYTransformation &right);
 
bool operator!=(const KEYTransformation &left, const KEYTransformation &right);
 
KEYTransformation makeTransformation(const KEYGeometry &geometry);
 
namespace transformations
{
 
KEYTransformation center(double width, double height);
 
KEYTransformation origin(double width, double height);
 
KEYTransformation flip(bool horizontal, bool vertical);
 
KEYTransformation rotate(double angle);
 
KEYTransformation scale(double ratioX, double ratioY);
 
KEYTransformation shear(double angleX, double angleY);
 
KEYTransformation translate(double offsetX, double offsetY);
 
}
 
}
 
#endif // KEYTRANSFORMATION_H_INCLUDED
 
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