96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGGA_DRIVEMANIPULATOR
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#define OSGGA_DRIVEMANIPULATOR 1
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#include <osgGA/CameraManipulator>
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namespace osgGA{
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/**
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DriveManipulator is a camera manipulator which provides drive-like
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functionality. By default, the left mouse button accelerates, the right
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mouse button decelerates, and the middle mouse button (or left and
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right simultaneously) stops dead.
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*/
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class OSGGA_EXPORT DriveManipulator : public CameraManipulator
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{
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public:
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DriveManipulator();
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virtual const char* className() const { return "Drive"; }
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virtual void setNode(osg::Node*);
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virtual const osg::Node* getNode() const;
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virtual osg::Node* getNode();
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virtual void home(const GUIEventAdapter& ea,GUIActionAdapter& us);
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virtual void init(const GUIEventAdapter& ea,GUIActionAdapter& us);
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virtual bool handle(const GUIEventAdapter& ea,GUIActionAdapter& us);
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/** Get the keyboard and mouse usage of this manipulator.*/
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virtual void getUsage(osg::ApplicationUsage& usage) const;
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protected:
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virtual ~DriveManipulator();
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/** Reset the internal GUIEvent stack.*/
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void flushMouseEventStack();
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/** Add the current mouse GUIEvent to internal stack.*/
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void addMouseEvent(const GUIEventAdapter& ea);
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void computeLocalDataFromCamera();
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void computeCameraFromLocalData();
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void computeCameraFromLocalData(const osg::Vec3& lv,const osg::Vec3& up);
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/** For the give mouse movement calculate the movement of the camera.
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Return true is camera has moved and a redraw is required.*/
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bool calcMovement();
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// Internal event stack comprising last three mouse events.
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osg::ref_ptr<const GUIEventAdapter> _ga_t1;
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osg::ref_ptr<const GUIEventAdapter> _ga_t0;
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osg::ref_ptr<osg::Node> _node;
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float _modelScale;
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float _velocity;
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float _height;
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float _buffer;
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enum SpeedControlMode {
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USE_MOUSE_Y_FOR_SPEED,
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USE_MOUSE_BUTTONS_FOR_SPEED
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};
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SpeedControlMode _speedMode;
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osg::Vec3 _eye;
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osg::Quat _rotation;
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float _distance;
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};
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}
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#endif
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