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/*
* This file is part of Krita
*
* Copyright (c) 2006 Cyrille Berger <cberger@cberger.net>
*
* 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 of the License, 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef _KIS_PERSPECTIVE_MATH_H_
#define _KIS_PERSPECTIVE_MATH_H_
#include "kis_vec.h"
#include <QPointF>
#include <Eigen/Geometry>
typedef Eigen::Matrix<qreal, 3, 3> Matrix3qreal;
typedef Eigen::Matrix<qreal, 9, 9> Matrix9qreal;
typedef Eigen::Matrix<qreal, 9, 1> Vector9qreal;
typedef Eigen::Hyperplane<qreal, 2> LineEquation;
#include <krita_export.h>
class QRect;
class KRITAIMAGE_EXPORT KisPerspectiveMath
{
private:
KisPerspectiveMath() { }
public:
static Matrix3qreal computeMatrixTransfo(const QPointF& topLeft1, const QPointF& topRight1, const QPointF& bottomLeft1, const QPointF& bottomRight1, const QPointF& topLeft2, const QPointF& topRight2, const QPointF& bottomLeft2, const QPointF& bottomRight2);
static Matrix3qreal computeMatrixTransfoToPerspective(const QPointF& topLeft, const QPointF& topRight, const QPointF& bottomLeft, const QPointF& bottomRight, const QRect& r);
static Matrix3qreal computeMatrixTransfoFromPerspective(const QRect& r, const QPointF& topLeft, const QPointF& topRight, const QPointF& bottomLeft, const QPointF& bottomRight);
/// TODO: get rid of this in 2.0
static inline QPointF matProd(const Matrix3qreal& m, const QPointF& p) {
qreal s = qreal(1) / (p.x() * m.coeff(2, 0) + p.y() * m.coeff(2, 1) + 1.0);
return QPointF((p.x() * m.coeff(0, 0) + p.y() * m.coeff(0, 1) + m.coeff(0, 2)) * s,
(p.x() * m.coeff(1, 0) + p.y() * m.coeff(1, 1) + m.coeff(1, 2)) * s);
}
};
#endif
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