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Added convinience constructors to help support picking with the new osgUtil::Intersector classes.

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This commit is contained in:
Robert Osfield
2006-11-02 17:05:46 +00:00
parent 7d12b85632
commit 06cca16a2a
3 changed files with 92 additions and 39 deletions
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65
src/osgUtil/IntersectionVisitor.cpp
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@@ -210,26 +210,41 @@ struct TriangleIntersector
// LineSegmentIntersector
//
LineSegmentIntersector::LineSegmentIntersector(const osg::Vec3d& start, const osg::Vec3d& end, LineSegmentIntersector* parent):
_parent(parent),
LineSegmentIntersector::LineSegmentIntersector(const osg::Vec3d& start, const osg::Vec3d& end):
_parent(0),
_start(start),
_end(end)
{
}
LineSegmentIntersector::LineSegmentIntersector(CoordinateFrame cf, const osg::Vec3d& start, const osg::Vec3d& end, LineSegmentIntersector* parent):
LineSegmentIntersector::LineSegmentIntersector(CoordinateFrame cf, const osg::Vec3d& start, const osg::Vec3d& end):
Intersector(cf),
_parent(parent),
_parent(0),
_start(start),
_end(end)
{
}
LineSegmentIntersector::LineSegmentIntersector(CoordinateFrame cf, double x, double y):
Intersector(cf),
_parent(0)
{
switch(cf)
{
case WINDOW : _start.set(x,y,0.0); _end.set(x,y,1.0); break;
case PROJECTION : _start.set(x,y,1.0); _end.set(x,y,-1.0); break;
case VIEW : _start.set(x,y,0.0); _end.set(x,y,1.0); break;
case MODEL : _start.set(x,y,0.0); _end.set(x,y,1.0); break;
}
}
Intersector* LineSegmentIntersector::clone(osgUtil::IntersectionVisitor& iv)
{
if (_coordinateFrame==MODEL && iv.getModelMatrix()==0)
{
return new LineSegmentIntersector(_start, _end, this);
osg::ref_ptr<LineSegmentIntersector> lsi = new LineSegmentIntersector(_start, _end);
lsi->_parent = this;
return lsi.release();
}
// compute the matrix that takes this Intersector from its CoordinateFrame into the local MODEL coordinate frame
@@ -260,7 +275,9 @@ Intersector* LineSegmentIntersector::clone(osgUtil::IntersectionVisitor& iv)
osg::Matrix inverse;
inverse.invert(matrix);
return new LineSegmentIntersector(_start * inverse, _end * inverse, this);
osg::ref_ptr<LineSegmentIntersector> lsi = new LineSegmentIntersector(_start * inverse, _end * inverse);
lsi->_parent = this;
return lsi.release();
}
bool LineSegmentIntersector::enter(const osg::Node& node)
@@ -497,24 +514,46 @@ bool LineSegmentIntersector::intersectAndClip(osg::Vec3d& s, osg::Vec3d& e,const
//
// IntersectorGroup
//
PolytopeIntersector::PolytopeIntersector(const osg::Polytope& polytope, PolytopeIntersector* parent):
_parent(parent),
PolytopeIntersector::PolytopeIntersector(const osg::Polytope& polytope):
_parent(0),
_polytope(polytope)
{
}
PolytopeIntersector::PolytopeIntersector(CoordinateFrame cf, const osg::Polytope& polytope, PolytopeIntersector* parent):
PolytopeIntersector::PolytopeIntersector(CoordinateFrame cf, const osg::Polytope& polytope):
Intersector(cf),
_parent(parent),
_parent(0),
_polytope(polytope)
{
}
PolytopeIntersector::PolytopeIntersector(CoordinateFrame cf, double xMin, double yMin, double xMax, double yMax):
Intersector(cf),
_parent(0)
{
double zNear = 0.0;
switch(cf)
{
case WINDOW : zNear = 0.0; break;
case PROJECTION : zNear = 1.0; break;
case VIEW : zNear = 0.0; break;
case MODEL : zNear = 0.0; break;
}
_polytope.add(osg::Plane(1.0, 0.0, 0.0, -xMin));
_polytope.add(osg::Plane(-1.0,0.0 ,0.0, xMax));
_polytope.add(osg::Plane(0.0, 1.0, 0.0,-yMin));
_polytope.add(osg::Plane(0.0,-1.0,0.0, yMax));
_polytope.add(osg::Plane(0.0,0.0,1.0, zNear));
}
Intersector* PolytopeIntersector::clone(osgUtil::IntersectionVisitor& iv)
{
if (_coordinateFrame==MODEL && iv.getModelMatrix()==0)
{
return new PolytopeIntersector(_polytope, this);
osg::ref_ptr<PolytopeIntersector> pi = new PolytopeIntersector(_polytope);
pi->_parent = this;
return pi.release();
}
// compute the matrix that takes this Intersector from its CoordinateFrame into the local MODEL coordinate frame
@@ -545,7 +584,9 @@ Intersector* PolytopeIntersector::clone(osgUtil::IntersectionVisitor& iv)
osg::Polytope transformedPolytope;
transformedPolytope.setAndTransformProvidingInverse(_polytope, matrix);
return new PolytopeIntersector(transformedPolytope, this);
osg::ref_ptr<PolytopeIntersector> pi = new PolytopeIntersector(transformedPolytope);
pi->_parent = this;
return pi.release();
}
bool PolytopeIntersector::enter(const osg::Node& node)