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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 OSGUTIL_PLANEINTERSECTOR
#define OSGUTIL_PLANEINTERSECTOR 1
#include <osgUtil/IntersectionVisitor>
#include <osg/CoordinateSystemNode>
namespace osgUtil
{
/** Concrete class for implementing polytope intersections with the scene graph.
* To be used in conjunction with IntersectionVisitor. */
class OSGUTIL_EXPORT PlaneIntersector : public Intersector
{
public:
/** Construct a PolytopeIntersector using speified polytope in MODEL coordinates.*/
PlaneIntersector(const osg::Plane& plane, const osg::Polytope& boundingPolytope=osg::Polytope());
/** Construct a PolytopeIntersector using speified polytope in specified coordinate frame.*/
PlaneIntersector(CoordinateFrame cf, const osg::Plane& plane, const osg::Polytope& boundingPolytope=osg::Polytope());
struct Intersection
{
Intersection() {}
bool operator < (const Intersection& rhs) const
{
if (polyline < rhs.polyline) return true;
if (rhs.polyline < polyline) return false;
if (nodePath < rhs.nodePath) return true;
if (rhs.nodePath < nodePath ) return false;
return (drawable < rhs.drawable);
}
typedef std::vector<osg::Vec3d> Polyline;
typedef std::vector<double> Attributes;
osg::NodePath nodePath;
osg::ref_ptr<osg::RefMatrix> matrix;
osg::ref_ptr<osg::Drawable> drawable;
Polyline polyline;
Attributes attributes;
};
typedef std::vector<Intersection> Intersections;
inline void insertIntersection(const Intersection& intersection) { getIntersections().push_back(intersection); }
inline Intersections& getIntersections() { return _parent ? _parent->_intersections : _intersections; }
void setRecordHeightsAsAttributes(bool flag) { _recordHeightsAsAttributes = flag; }
bool getRecordHeightsAsAttributes() const { return _recordHeightsAsAttributes; }
void setEllipsoidModel(osg::EllipsoidModel* em) { _em = em; }
const osg::EllipsoidModel* getEllipsoidModel() const { return _em.get(); }
public:
virtual Intersector* clone(osgUtil::IntersectionVisitor& iv);
virtual bool enter(const osg::Node& node);
virtual void leave();
virtual void intersect(osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable);
virtual void reset();
virtual bool containsIntersections() { return !getIntersections().empty(); }
protected:
PlaneIntersector* _parent;
bool _recordHeightsAsAttributes;
osg::ref_ptr<osg::EllipsoidModel> _em;
osg::Plane _plane;
osg::Polytope _polytope;
Intersections _intersections;
};
}
#endif
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