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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library 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
* OpenSceneGraph Public License for more details.
*/
#ifndef OSGGA_NODETRACKERMANIPULATOR
#define OSGGA_NODETRACKERMANIPULATOR 1
#include <osgGA/MatrixManipulator>
#include <osg/Quat>
#include <osg/observer_ptr>
namespace osgGA{
class OSGGA_EXPORT NodeTrackerManipulator : public MatrixManipulator
{
public:
NodeTrackerManipulator();
virtual const char* className() const { return "NodeTrackerManipulator"; }
typedef std::vector< osg::observer_ptr<osg::Node> > ObserverNodePath;
void setTrackNodePath(const osg::NodePath& nodePath)
{
_trackNodePath.clear();
_trackNodePath.reserve(nodePath.size());
std::copy(nodePath.begin(), nodePath.end(), std::back_inserter(_trackNodePath));
}
void setTrackNodePath(const ObserverNodePath& nodePath) { _trackNodePath = nodePath; }
ObserverNodePath& getTrackNodePath() { return _trackNodePath; }
void setTrackNode(osg::Node* node);
osg::Node* getTrackNode() { return _trackNodePath.empty() ? 0 : _trackNodePath.back().get(); }
const osg::Node* getTrackNode() const { return _trackNodePath.empty() ? 0 : _trackNodePath.back().get(); }
enum TrackerMode
{
/** Track the center of the node's bounding sphere, but not rotations of the node.
* For databases which have a CoordinateSystemNode, the orientation is kept relative the coordinate frame if the center of the node.
*/
NODE_CENTER,
/** Track the center of the node's bounding sphere, and the azimuth rotation (about the z axis of the current coordinate frame).
* For databases which have a CoordinateSystemNode, the orientation is kept relative the coordinate frame if the center of the node.
*/
NODE_CENTER_AND_AZIM,
/** Tack the center of the node's bounding sphere, and the all rotations of the node.
*/
NODE_CENTER_AND_ROTATION
};
void setTrackerMode(TrackerMode mode);
TrackerMode getTrackerMode() const { return _trackerMode; }
enum RotationMode
{
/** Use a trackball style manipulation of the view direction w.r.t the tracked orientation.
*/
TRACKBALL,
/** Allow the elevation and azimuth angles to be adjust w.r.t the tracked orientation.
*/
ELEVATION_AZIM
};
void setRotationMode(RotationMode mode);
RotationMode getRotationMode() const { return _rotationMode; }
/** set the position of the matrix manipulator using a 4x4 Matrix.*/
virtual void setByMatrix(const osg::Matrixd& matrix);
/** set the position of the matrix manipulator using a 4x4 Matrix.*/
virtual void setByInverseMatrix(const osg::Matrixd& matrix) { setByMatrix(osg::Matrixd::inverse(matrix)); }
/** get the position of the manipulator as 4x4 Matrix.*/
virtual osg::Matrixd getMatrix() const;
/** get the position of the manipulator as a inverse matrix of the manipulator, typically used as a model view matrix.*/
virtual osg::Matrixd getInverseMatrix() const;
/** Get the FusionDistanceMode. Used by SceneView for setting up stereo convergence.*/
virtual osgUtil::SceneView::FusionDistanceMode getFusionDistanceMode() const { return osgUtil::SceneView::USE_FUSION_DISTANCE_VALUE; }
/** Get the FusionDistanceValue. Used by SceneView for setting up stereo convergence.*/
virtual float getFusionDistanceValue() const { return _distance; }
/** Attach a node to the manipulator.
Automatically detaches previously attached node.
setNode(NULL) detaches previously nodes.
Is ignored by manipulators which do not require a reference model.*/
virtual void setNode(osg::Node*);
/** Return node if attached.*/
virtual const osg::Node* getNode() const;
/** Return node if attached.*/
virtual osg::Node* getNode();
virtual void computeHomePosition();
/** Move the camera to the default position.
May be ignored by manipulators if home functionality is not appropriate.*/
virtual void home(const GUIEventAdapter& ea,GUIActionAdapter& us);
/** Start/restart the manipulator.*/
virtual void init(const GUIEventAdapter& ea,GUIActionAdapter& us);
/** handle events, return true if handled, false otherwise.*/
virtual bool handle(const GUIEventAdapter& ea,GUIActionAdapter& us);
/** Get the keyboard and mouse usage of this manipulator.*/
virtual void getUsage(osg::ApplicationUsage& usage) const;
protected:
virtual ~NodeTrackerManipulator();
osg::NodePath getNodePath() const;
bool validateNodePath() const;
/** Reset the internal GUIEvent stack.*/
void flushMouseEventStack();
/** Add the current mouse GUIEvent to internal stack.*/
void addMouseEvent(const GUIEventAdapter& ea);
void computeNodeWorldToLocal(osg::Matrixd& worldToLocal) const;
void computeNodeLocalToWorld(osg::Matrixd& localToWorld) const;
void computeNodeCenterAndRotation(osg::Vec3d& center, osg::Quat& rotation) const;
void computePosition(const osg::Vec3d& eye,const osg::Vec3d& lv,const osg::Vec3d& up);
/** For the give mouse movement calculate the movement of the camera.
Return true is camera has moved and a redraw is required.*/
bool calcMovement();
void trackball(osg::Vec3& axis,double& angle, double p1x, double p1y, double p2x, double p2y);
double tb_project_to_sphere(double r, double x, double y);
/** Check the speed at which the mouse is moving.
If speed is below a threshold then return false, otherwise return true.*/
bool isMouseMoving();
void clampOrientation();
// Internal event stack comprising last two mouse events.
osg::ref_ptr<const GUIEventAdapter> _ga_t1;
osg::ref_ptr<const GUIEventAdapter> _ga_t0;
osg::ref_ptr<osg::Node> _node;
ObserverNodePath _trackNodePath;
TrackerMode _trackerMode;
RotationMode _rotationMode;
bool _thrown;
osg::Quat _nodeRotation;
osg::Quat _rotation;
float _distance;
};
}
#endif
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