109 lines
3.6 KiB
C++
109 lines
3.6 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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 OSGUTIL_PLANEINTERSECTOR
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#define OSGUTIL_PLANEINTERSECTOR 1
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#include <osgUtil/IntersectionVisitor>
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#include <osg/CoordinateSystemNode>
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namespace osgUtil
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{
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/** Concrete class for implementing polytope intersections with the scene graph.
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* To be used in conjunction with IntersectionVisitor. */
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class OSGUTIL_EXPORT PlaneIntersector : public Intersector
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{
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public:
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/** Construct a PolytopeIntersector using speified polytope in MODEL coordinates.*/
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PlaneIntersector(const osg::Plane& plane, const osg::Polytope& boundingPolytope=osg::Polytope());
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/** Construct a PolytopeIntersector using speified polytope in specified coordinate frame.*/
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PlaneIntersector(CoordinateFrame cf, const osg::Plane& plane, const osg::Polytope& boundingPolytope=osg::Polytope());
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struct Intersection
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{
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Intersection() {}
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bool operator < (const Intersection& rhs) const
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{
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if (polyline < rhs.polyline) return true;
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if (rhs.polyline < polyline) return false;
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if (nodePath < rhs.nodePath) return true;
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if (rhs.nodePath < nodePath ) return false;
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return (drawable < rhs.drawable);
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}
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typedef std::vector<osg::Vec3d> Polyline;
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typedef std::vector<double> Attributes;
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osg::NodePath nodePath;
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osg::ref_ptr<osg::RefMatrix> matrix;
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osg::ref_ptr<osg::Drawable> drawable;
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Polyline polyline;
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Attributes attributes;
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};
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typedef std::vector<Intersection> Intersections;
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inline void insertIntersection(const Intersection& intersection) { getIntersections().push_back(intersection); }
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inline Intersections& getIntersections() { return _parent ? _parent->_intersections : _intersections; }
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void setRecordHeightsAsAttributes(bool flag) { _recordHeightsAsAttributes = flag; }
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bool getRecordHeightsAsAttributes() const { return _recordHeightsAsAttributes; }
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void setEllipsoidModel(osg::EllipsoidModel* em) { _em = em; }
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const osg::EllipsoidModel* getEllipsoidModel() const { return _em.get(); }
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public:
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virtual Intersector* clone(osgUtil::IntersectionVisitor& iv);
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virtual bool enter(const osg::Node& node);
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virtual void leave();
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virtual void intersect(osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable);
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virtual void reset();
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virtual bool containsIntersections() { return !getIntersections().empty(); }
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protected:
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PlaneIntersector* _parent;
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bool _recordHeightsAsAttributes;
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osg::ref_ptr<osg::EllipsoidModel> _em;
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osg::Plane _plane;
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osg::Polytope _polytope;
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Intersections _intersections;
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};
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}
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#endif
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