ViewerObjectSelectionHandler.h

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#pragma once
 
#include <osgGA/GUIEventHandler>
 
class Model;
class Viewer;
 
namespace osgViewer
{
    class Viewer;
}
 
class ViewerObjectSelectionHandler : public osgGA::GUIEventHandler {
public:
    ViewerObjectSelectionHandler(Viewer * _creator) : active(false), creator(_creator) {};
    virtual bool handle(const osgGA::GUIEventAdapter &ea, osgGA::GUIActionAdapter &aa) override;
    void setModel(Model *m) { model = m; };
    void setActive(bool a) { active = a; };
 
private:
    enum projectionType {IN_PLANE, HEIGHT};
 
    void processRubberbandUpdate(osgViewer::Viewer *viewer, float mouseX, float mouseY, enum projectionType pType, const osg::Vec3 &n, const osg::Vec3 &p);
    void getWorldRay(osgViewer::Viewer *viewer, float mouseX, float mouseY, osg::Vec3 &rayStart, osg::Vec3 &rayEnd);
    bool intersectLinePlane(const osg::Vec3 &n, const osg::Vec3 &p, const osg::Vec3 &l1, const osg::Vec3 &l2, osg::Vec3 &ip);
    osgUtil::Intersector *createIntersector(osgUtil::Intersector::CoordinateFrame cf, double x, double y);
 
    Model *model;
    bool   active;
    Viewer * creator;
    osg::Vec3 lastPointInPlane;
};