169 lines
5.8 KiB
C++
169 lines
5.8 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_UFO_MANIPULATOR_DEF
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#define OSGGA_UFO_MANIPULATOR_DEF 1
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#include <iostream>
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#include <Producer/Keyboard>
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#include <osgGA/MatrixManipulator>
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#include <osg/Node>
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#include <osg/Matrix>
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/**
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\class UFOManipulator
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\brief A UFO manipulator driven with keybindings.
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The UFOManipulator is better suited for applications that employ
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architectural walk-throughs, or situations where the eyepoint motion
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model must move slowly, deliberately and well controlled.
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The UFO Manipulator allows the following movements with the listed
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Key combinations:
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\param UpArrow Acceleration forward.
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\param DownArrow Acceleration backward (or deceleration forward).
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\param LeftArrow Rotate view and direction of travel to the left.
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\param RightArrow Rotate view and direction of travel to the right.
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\param SpaceBar Brake. Gradually decelerates linear and rotational movement.
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\param Shift/UpArrow Accelerate up.
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\param Shift/DownArrow Accelerate down.
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\param Shift/LeftArrow Accelerate (linearly) left.
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\param Shift/RightArrow Accelerate (linearly) right.
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\param Shift/SpaceBar Instant brake. Immediately stop all linear and rotational movement.
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When the Shift key is released, up, down, linear left and/or linear right movement is decelerated.
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\param Ctrl/UpArrow Rotate view (but not direction of travel) up.
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\param Ctrl/DownArrow Rotate view (but not direction of travel) down.
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\param Ctrl/LeftArrow Rotate view (but not direction of travel) left.
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\param Ctrl/RightArrow Rotate view (but not direction of travel) right.
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\param Ctrl/Return Straightens out the view offset.
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*/
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namespace osgGA {
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class OSGGA_EXPORT UFOManipulator : public osgGA::MatrixManipulator
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{
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public:
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/** Default constructor */
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UFOManipulator();
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/** return className
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\return returns constant "UFO"
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*/
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virtual const char* className() const;
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/** Set the current position with a matrix
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\param matrix A viewpoint matrix.
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*/
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virtual void setByMatrix( const osg::Matrixd &matrix ) ;
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/** Set the current position with the invers matrix
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\param invmatrix The inverse of a viewpoint matrix
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*/
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virtual void setByInverseMatrix( const osg::Matrixd &invmat);
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/** Get the current viewmatrix */
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virtual osg::Matrixd getMatrix() const;
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/** Get the current inverse view matrix */
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virtual osg::Matrixd getInverseMatrix() const ;
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/** Set the subgraph this manipulator is driving the eye through.
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\param node root of subgraph
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*/
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virtual void setNode(osg::Node*);
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/** Get the root node of the subgraph this manipulator is driving the eye through (const)*/
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virtual const osg::Node* getNode() const;
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/** Get the root node of the subgraph this manipulator is driving the eye through */
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virtual osg::Node* getNode();
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/** Computes the home position based on the extents and scale of the
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scene graph rooted at node */
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virtual void computeHomePosition();
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/** Sets the viewpoint matrix to the home position */
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virtual void home(const osgGA::GUIEventAdapter&, osgGA::GUIActionAdapter&) ;
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void home(void);
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/** Handles incoming osgGA events */
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bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter &aa);
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/** Reports Usage parameters to the application */
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void getUsage(osg::ApplicationUsage& usage) const;
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/** Report the current position as LookAt vectors */
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void getCurrentPositionAsLookAt( osg::Vec3 &eye, osg::Vec3 ¢er, osg::Vec3 &up );
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protected:
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private:
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osg::ref_ptr<osg::Node> _node;
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float _viewAngle;
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osg::Matrixd _matrix;
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osg::Matrixd _inverseMatrix;
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osg::Matrixd _offset;
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double _minHeightAboveGround;
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double _minDistanceInFront;
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double _speedEpsilon;
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double _forwardSpeed;
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double _sideSpeed;
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double _upSpeed;
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double _speedAccelerationFactor;
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double _speedDecelerationFactor;
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bool _decelerateUpSideRate;
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double _directionRotationEpsilon;
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double _directionRotationRate;
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double _directionRotationAcceleration;
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double _directionRotationDeceleration;
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double _viewOffsetDelta;
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double _pitchOffsetRate;
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double _pitchOffset;
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double _yawOffsetRate;
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double _yawOffset;
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double _t0;
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double _dt;
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osg::Vec3 _direction;
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osg::Vec3 _position;
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bool _shift;
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bool _ctrl;
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bool _decelerateOffsetRate;
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bool _straightenOffset;
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void _stop();
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void _keyDown( const osgGA::GUIEventAdapter &ea, osgGA::GUIActionAdapter &);
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void _keyUp( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter &);
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void _frame(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter &);
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void _adjustPosition();
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};
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}
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#endif
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