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58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra. Eigen itself is part of the KDE project.
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//
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// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
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//
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// Eigen is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 3 of the License, or (at your option) any later version.
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//
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// Alternatively, you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of
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// the License, or (at your option) any later version.
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//
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// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License and a copy of the GNU General Public License along with
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// Eigen. If not, see <http://www.gnu.org/licenses/>.
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#ifndef EIGEN_TRACKBALL_H
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#define EIGEN_TRACKBALL_H
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#include <Eigen/Geometry>
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class Camera;
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class Trackball
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{
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public:
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enum Mode {Around, Local};
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Trackball() : mpCamera(0) {}
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void start(Mode m = Around) { mMode = m; mLastPointOk = false; }
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void setCamera(Camera* pCam) { mpCamera = pCam; }
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void track(const Eigen::Vector2i& newPoint2D);
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protected:
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bool mapToSphere( const Eigen::Vector2i& p2, Eigen::Vector3f& v3);
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Camera* mpCamera;
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Eigen::Vector3f mLastPoint3D;
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Mode mMode;
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bool mLastPointOk;
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};
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#endif // EIGEN_TRACKBALL_H
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