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Added prelimnary work on PolytopeIntersector.

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This commit is contained in:
Robert Osfield
2006-11-02 12:17:06 +00:00
parent 15f7abe100
commit f9fb99dc43
2 changed files with 146 additions and 3 deletions
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92
src/osgUtil/IntersectionVisitor.cpp
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@@ -495,9 +495,94 @@ bool LineSegmentIntersector::intersectAndClip(osg::Vec3d& s, osg::Vec3d& e,const
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// LineSegmentIntersector
// IntersectorGroup
//
PolytopeIntersector::PolytopeIntersector(const osg::Polytope& polytope, PolytopeIntersector* parent):
_parent(parent),
_polytope(polytope)
{
}
PolytopeIntersector::PolytopeIntersector(CoordinateFrame cf, const osg::Polytope& polytope, PolytopeIntersector* parent):
Intersector(cf),
_parent(parent),
_polytope(polytope)
{
}
Intersector* PolytopeIntersector::clone(osgUtil::IntersectionVisitor& iv)
{
if (_coordinateFrame==MODEL && iv.getModelMatrix()==0)
{
return new PolytopeIntersector(_polytope, this);
}
// compute the matrix that takes this Intersector from its CoordinateFrame into the local MODEL coordinate frame
// that geometry in the scene graph will always be in.
osg::Matrix matrix;
switch (_coordinateFrame)
{
case(WINDOW):
if (iv.getWindowMatrix()) matrix.preMult( *iv.getWindowMatrix() );
if (iv.getProjectionMatrix()) matrix.preMult( *iv.getProjectionMatrix() );
if (iv.getViewMatrix()) matrix.preMult( *iv.getViewMatrix() );
if (iv.getModelMatrix()) matrix.preMult( *iv.getModelMatrix() );
break;
case(PROJECTION):
if (iv.getProjectionMatrix()) matrix.preMult( *iv.getProjectionMatrix() );
if (iv.getViewMatrix()) matrix.preMult( *iv.getViewMatrix() );
if (iv.getModelMatrix()) matrix.preMult( *iv.getModelMatrix() );
break;
case(VIEW):
if (iv.getViewMatrix()) matrix.preMult( *iv.getViewMatrix() );
if (iv.getModelMatrix()) matrix.preMult( *iv.getModelMatrix() );
break;
case(MODEL):
if (iv.getModelMatrix()) matrix = *iv.getModelMatrix();
break;
}
osg::Polytope transformedPolytope;
transformedPolytope.setAndTransformProvidingInverse(_polytope, matrix);
return new PolytopeIntersector(transformedPolytope, this);
}
bool PolytopeIntersector::enter(const osg::Node& node)
{
return !node.isCullingActive() || _polytope.contains( node.getBound() );
}
void PolytopeIntersector::leave()
{
// do nothing.
}
void PolytopeIntersector::intersect(osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable)
{
if ( !_polytope.contains( drawable->getBound() ) ) return;
Intersection hit;
hit.nodePath = iv.getNodePath();
hit.drawable = drawable;
}
void PolytopeIntersector::reset()
{
Intersector::reset();
_intersections.clear();
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// IntersectorGroup
//
IntersectorGroup::IntersectorGroup()
{
@@ -782,9 +867,10 @@ void IntersectionVisitor::apply(osg::Projection& projection)
void IntersectionVisitor::apply(osg::CameraNode& camera)
{
//osg::notify(osg::NOTICE)<<"apply(CameraNode&)"<<std::endl;
// osg::notify(osg::NOTICE)<<"apply(CameraNode&)"<<std::endl;
if (!enter(camera)) return;
// note, commenting out right now because default CameraNode setup is with the culling active. Should this be changed?
// if (!enter(camera)) return;
// osg::notify(osg::NOTICE)<<"inside apply(CameraNode&)"<<std::endl;