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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
//
// 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 EIGEN_TRACKBALL_H
#define EIGEN_TRACKBALL_H
#include <Eigen/Geometry>
class Camera;
class Trackball
{
public:
enum Mode {Around, Local};
Trackball() : mpCamera(0) {}
void start(Mode m = Around) { mMode = m; mLastPointOk = false; }
void setCamera(Camera* pCam) { mpCamera = pCam; }
void track(const Eigen::Vector2i& newPoint2D);
protected:
bool mapToSphere( const Eigen::Vector2i& p2, Eigen::Vector3f& v3);
Camera* mpCamera;
Eigen::Vector3f mLastPoint3D;
Mode mMode;
bool mLastPointOk;
};
#endif // EIGEN_TRACKBALL_H
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