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trackball.h
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trackball.h
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/* This file is part of PlasmaView.
*
* PlasmaView 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 3 of the License, or
* (at your option) any later version.
*
* PlasmaView 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 Gneral Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PlasmaView. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _TRACKBALL_H
#define _TRACKBALL_H
/* Borrowed from PlasmaShop */
#include <QVector3D>
#include <QMatrix4x4>
class Trackball
{
public:
Trackball() { }
void push(const QPointF &p);
void move(const QPointF &p);
void release(const QPointF &) { }
QMatrix4x4 rotation() const { return m_rotation; }
private:
QMatrix4x4 m_rotation;
QMatrix4x4 m_lastRotation;
QPointF m_lastPos;
QVector3D m_lastPos3D;
};
#endif