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Added beginnings of osgUtil::PlaneIntersector and osgSim::ElevationSlice

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This commit is contained in:
Robert Osfield
2006-11-27 20:25:36 +00:00
parent ae79bebd82
commit 05bffbe9c4
6 changed files with 352 additions and 1 deletions
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101
src/osgUtil/IntersectionVisitor.cpp
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@@ -512,7 +512,7 @@ bool LineSegmentIntersector::intersectAndClip(osg::Vec3d& s, osg::Vec3d& e,const
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// IntersectorGroup
// PolytopeIntersector
//
PolytopeIntersector::PolytopeIntersector(const osg::Polytope& polytope):
_parent(0),
@@ -629,6 +629,105 @@ void PolytopeIntersector::reset()
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// PlaneIntersector
//
PlaneIntersector::PlaneIntersector(const osg::Plane& plane, const osg::Polytope& boundingPolytope):
_parent(0),
_plane(plane),
_polytope(boundingPolytope)
{
}
PlaneIntersector::PlaneIntersector(CoordinateFrame cf, const osg::Plane& plane, const osg::Polytope& boundingPolytope):
Intersector(cf),
_parent(0),
_plane(plane),
_polytope(boundingPolytope)
{
}
Intersector* PlaneIntersector::clone(osgUtil::IntersectionVisitor& iv)
{
if (_coordinateFrame==MODEL && iv.getModelMatrix()==0)
{
osg::ref_ptr<PlaneIntersector> pi = new PlaneIntersector(_plane, _polytope);
pi->_parent = this;
return pi.release();
}
// 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::Plane plane = _plane;
plane.transformProvidingInverse(matrix);
osg::Polytope transformedPolytope;
transformedPolytope.setAndTransformProvidingInverse(_polytope, matrix);
osg::ref_ptr<PlaneIntersector> pi = new PlaneIntersector(plane, transformedPolytope);
pi->_parent = this;
return pi.release();
}
bool PlaneIntersector::enter(const osg::Node& node)
{
return !node.isCullingActive() ||
( _plane.intersect(node.getBound()) && _polytope.contains(node.getBound()) );
}
void PlaneIntersector::leave()
{
// do nothing.
}
void PlaneIntersector::intersect(osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable)
{
if ( !_plane.intersect( drawable->getBound() ) ) return;
if ( !_polytope.contains( drawable->getBound() ) ) return;
Intersection hit;
hit.nodePath = iv.getNodePath();
hit.drawable = drawable;
insertIntersection(hit);
}
void PlaneIntersector::reset()
{
Intersector::reset();
_intersections.clear();
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// IntersectorGroup