simulator/transform.h (5bca604) - libetherpix · BlinkenArea

transform.h

/*
 * EtherPix simulator
 *
 * Copyright 2017 Stefan Schuermans <stefan schuermans info>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 *
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TRANSFORM_H
#define TRANSFORM_H

#include "bbox.h"

/// coordinate transformation
class Transform
{
public:
  /**
   * @brief constructor
   * @param[in] bb boundig box of input coordinates
   * @param[in] width width of output coordinate speace (left to right)
   * @param[in] height height of output coordinate space (top to bottom)
   */
  Transform(BBox const &bb, double width, double height);

/// check if initialized
  bool checkInit() const { return m_init; }

/**
   * @brief apply transformation
   * @param[in] in_x input x coordinate
   * @param[in] in_y input y coordinate
   * @param[out] out_x output x coordinate
   * @param[out] out_y output y coordinate
   */
  void apply(double in_x, double in_y, double &out_x, double &out_y) const;

/**
   * @brief apply zoom
   * @param[in] in_r input radius
   * @param[out] out_r output radius
   */
  void applyZoom(double in_r, double &out_r) const;

protected:
   bool m_init; ///< initialization flag, false means no transformation data
   double m_zoom; ///< zoom factor (use negative for y direction)
   double m_shift_x; ///< shift in x direction
   double m_shift_y; ///< shift in y direction
};

#endif // #ifndef TRANSFORM_H

libetherpix

implement drawing pixels