perspectivematrix.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2005-02-17
 * Description : a matrix implementation for image
 *               perspective adjustment.
 *
 * Copyright (C) 2005-2022 by Gilles Caulier <caulier dot gilles at gmail dot com>
 * Copyright (C) 2006-2012 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
 *
 * 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;
 * either version 2, or (at your option)
 * any later version.
 *
 * 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.
 *
 * ============================================================ */
 
#ifndef DIGIKAM_EDITOR_PERSPECTIVE_MATRIX_H
#define DIGIKAM_EDITOR_PERSPECTIVE_MATRIX_H
 
namespace DigikamEditorPerspectiveToolPlugin
{
 
class PerspectiveMatrix
{
public:
 
    explicit PerspectiveMatrix();
 
    void translate(double x, double y);
 
    void scale(double x, double y);
 
    void invert();
 
    void multiply(const PerspectiveMatrix& matrix1);
 
    void transformPoint(double x, double y, double* newx, double* newy) const;
 
    double determinant() const;
 
public:
 
    double coeff[3][3];
};
 
} // namespace DigikamEditorPerspectiveToolPlugin
 
#endif // DIGIKAM_EDITOR_PERSPECTIVE_MATRIX_H