/usr/include/osgUtil/IntersectVisitor is in libopenscenegraph-dev 3.2.1-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 | /* -*-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_INTERSECTVISITOR
#define OSGUTIL_INTERSECTVISITOR 1
#include <osg/NodeVisitor>
#include <osg/LineSegment>
#include <osg/Geode>
#include <osg/Matrix>
#include <osg/Transform>
#include <osgUtil/Export>
#include <map>
#include <set>
#include <vector>
namespace osgUtil {
class OSGUTIL_EXPORT Hit
{
/** Deprecated */
public:
Hit();
Hit(const Hit& hit);
~Hit();
Hit& operator = (const Hit& hit);
typedef std::vector<int> VecIndexList;
bool operator < (const Hit& hit) const
{
if (_originalLineSegment<hit._originalLineSegment) return true;
if (hit._originalLineSegment<_originalLineSegment) return false;
return _ratio<hit._ratio;
}
const osg::Vec3& getLocalIntersectPoint() const { return _intersectPoint; }
const osg::Vec3& getLocalIntersectNormal() const { return _intersectNormal; }
const osg::Vec3 getWorldIntersectPoint() const { if (_matrix.valid()) return _intersectPoint*(*_matrix); else return _intersectPoint; }
const osg::Vec3 getWorldIntersectNormal() const ;
float getRatio() const { return _ratio; }
const osg::LineSegment* getOriginalLineSegment() const { return _originalLineSegment.get(); }
const osg::LineSegment* getLocalLineSegment() const { return _localLineSegment.get(); }
osg::NodePath& getNodePath() { return _nodePath; }
const osg::NodePath& getNodePath() const { return _nodePath; }
osg::Geode* getGeode() { return _geode.get(); }
const osg::Geode* getGeode() const { return _geode.get(); }
osg::Drawable* getDrawable() { return _drawable.get(); }
const osg::Drawable* getDrawable() const { return _drawable.get(); }
const osg::RefMatrix* getMatrix() const { return _matrix.get(); }
const osg::RefMatrix* getInverseMatrix() const { return _inverse.get(); }
const VecIndexList& getVecIndexList() const { return _vecIndexList; }
int getPrimitiveIndex() const { return _primitiveIndex; }
float _ratio;
osg::ref_ptr<osg::LineSegment> _originalLineSegment;
osg::ref_ptr<osg::LineSegment> _localLineSegment;
osg::NodePath _nodePath;
osg::ref_ptr<osg::Geode> _geode;
osg::ref_ptr<osg::Drawable> _drawable;
osg::ref_ptr<osg::RefMatrix> _matrix;
osg::ref_ptr<osg::RefMatrix> _inverse;
VecIndexList _vecIndexList;
int _primitiveIndex;
osg::Vec3 _intersectPoint;
osg::Vec3 _intersectNormal;
};
/** Deprecated - use IntersectionVisitor instead.*/
class OSGUTIL_EXPORT IntersectVisitor : public osg::NodeVisitor
{
public:
IntersectVisitor();
virtual ~IntersectVisitor();
META_NodeVisitor(osgUtil, IntersectVisitor)
void reset();
/** Add a line segment to use for intersection testing during scene traversal.
* Note, a maximum of 32 line segments can be added to a IntersectVistor,
* adding more than this will result in warning being emitted to the console
* and the excess segments being ignored.*/
void addLineSegment(osg::LineSegment* seg);
typedef std::vector<Hit> HitList;
typedef std::map<const osg::LineSegment*,HitList > LineSegmentHitListMap;
HitList& getHitList(const osg::LineSegment* seg) { return _segHitList[seg]; }
int getNumHits(const osg::LineSegment* seg) { return _segHitList[seg].size(); }
LineSegmentHitListMap& getSegHitList() { return _segHitList; }
bool hits();
enum LODSelectionMode
{
USE_HIGHEST_LEVEL_OF_DETAIL,
USE_SEGMENT_START_POINT_AS_EYE_POINT_FOR_LOD_LEVEL_SELECTION
};
void setLODSelectionMode(LODSelectionMode mode) { _lodSelectionMode = mode; }
LODSelectionMode getLODSelectionMode() const { return _lodSelectionMode; }
/** Set the eye point in local coordinates.
* This is a pseudo-EyePoint for billboarding and LOD purposes.
* It is copied from the Start point of the most-recently-added segment
* of the intersection ray set (IntersectState::_segList). */
void setEyePoint(const osg::Vec3& eye) { _pseudoEyePoint = eye; }
virtual osg::Vec3 getEyePoint() const;
/** Get the distance from a point to the eye point, distance value in local coordinate system.
* This is calculated using the pseudo-EyePoint (above) when doing LOD calculcations. */
virtual float getDistanceToEyePoint(const osg::Vec3& pos, bool withLODScale) const;
virtual void apply(osg::Node&);
virtual void apply(osg::Geode& node);
virtual void apply(osg::Billboard& node);
virtual void apply(osg::Group& node);
virtual void apply(osg::Transform& node);
virtual void apply(osg::Switch& node);
virtual void apply(osg::LOD& node);
protected:
class IntersectState : public osg::Referenced
{
public:
IntersectState();
osg::ref_ptr<osg::RefMatrix> _view_matrix;
osg::ref_ptr<osg::RefMatrix> _view_inverse;
osg::ref_ptr<osg::RefMatrix> _model_matrix;
osg::ref_ptr<osg::RefMatrix> _model_inverse;
typedef std::pair<osg::ref_ptr<osg::LineSegment>,osg::ref_ptr<osg::LineSegment> > LineSegmentPair;
typedef std::vector< LineSegmentPair > LineSegmentList;
LineSegmentList _segList;
typedef unsigned int LineSegmentMask;
typedef std::vector<LineSegmentMask> LineSegmentMaskStack;
LineSegmentMaskStack _segmentMaskStack;
bool isCulled(const osg::BoundingSphere& bs,LineSegmentMask& segMaskOut);
bool isCulled(const osg::BoundingBox& bb,LineSegmentMask& segMaskOut);
void addLineSegment(osg::LineSegment* seg);
protected:
~IntersectState();
};
bool intersect(osg::Drawable& gset);
void pushMatrix(osg::RefMatrix* matrix, osg::Transform::ReferenceFrame rf);
void popMatrix();
bool enterNode(osg::Node& node);
void leaveNode();
typedef std::vector<osg::ref_ptr<IntersectState> > IntersectStateStack;
IntersectStateStack _intersectStateStack;
LineSegmentHitListMap _segHitList;
LODSelectionMode _lodSelectionMode;
osg::Vec3 _pseudoEyePoint;
};
/** Picking intersection visitor specialises the IntersectVistor to allow more convinient handling of mouse picking.*/
class OSGUTIL_EXPORT PickVisitor : public osgUtil::IntersectVisitor
{
public:
PickVisitor(const osg::Viewport* viewport, const osg::Matrixd& proj, const osg::Matrixd& view, float mx, float my);
void runNestedPickVisitor(osg::Node& node, const osg::Viewport* viewport, const osg::Matrix& proj, const osg::Matrix& view, float mx, float my);
void apply(osg::Projection& projection);
void apply(osg::Camera& camera);
protected:
float _mx;
float _my;
osg::ref_ptr<const osg::Viewport> _lastViewport;
osg::Matrixd _lastProjectionMatrix;
osg::Matrixd _lastViewMatrix;
};
}
#endif
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