OpenSceneGraph/src/osg/OccluderNode.cpp

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/* -*-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.
*/
#include <osg/OccluderNode>
using namespace osg;
OccluderNode::OccluderNode()
{
}
OccluderNode::OccluderNode(const OccluderNode& node,const CopyOp& copyop):
Group(node,copyop),
_occluder(dynamic_cast<ConvexPlanarOccluder*>(copyop(node._occluder.get())))
{
}
BoundingSphere OccluderNode::computeBound() const
{
BoundingSphere bsphere(Group::computeBound());
if (getOccluder())
{
BoundingBox bb;
const ConvexPlanarPolygon::VertexList& vertexList = getOccluder()->getOccluder().getVertexList();
for(ConvexPlanarPolygon::VertexList::const_iterator itr=vertexList.begin();
itr!=vertexList.end();
++itr)
{
bb.expandBy(*itr);
}
if (bb.valid())
{
bsphere.expandBy(bb);
}
}
return bsphere;
}