/usr/include/simgear/bvh/BVHSubTreeCollector.hxx is in libsimgear-dev 3.4.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// 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 GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
#ifndef BVHSubTreeCollector_hxx
#define BVHSubTreeCollector_hxx
#include <simgear/math/SGGeometry.hxx>
#include "BVHVisitor.hxx"
#include "BVHNode.hxx"
#include "BVHGroup.hxx"
#include "BVHStaticNode.hxx"
namespace simgear {
/// Visitor to subcollect parts of an existing bounding volume tree.
/// Given a sphere, it takes those sub parts of the tree that intersect the
/// sphere. Transform nodes of any kind are preserved to be able to ask for
/// intersections a different times. The subcollected tree is kept as small as
/// possible as it does avoid having groups with single childs.
/// Also the BVHStaticGeometry parts are seached for subtrees that are outside
/// the sphere.
class BVHSubTreeCollector : public BVHVisitor {
public:
typedef std::vector<SGSharedPtr<BVHNode> > NodeList;
BVHSubTreeCollector(const SGSphered& sphere = SGSphered());
virtual ~BVHSubTreeCollector();
virtual void apply(BVHGroup&);
virtual void apply(BVHPageNode&);
virtual void apply(BVHTransform&);
virtual void apply(BVHMotionTransform&);
virtual void apply(BVHLineGeometry&);
virtual void apply(BVHStaticGeometry&);
virtual void apply(const BVHStaticBinary&, const BVHStaticData&);
virtual void apply(const BVHStaticTriangle&, const BVHStaticData&);
void setSphere(const SGSphered& sphere)
{ _sphere = sphere; }
const SGSphered& getSphere() const
{ return _sphere; }
bool haveChildren() const
{ return !_nodeList.empty(); }
void addNode(BVHNode* node);
void pushNodeList(NodeList& parentNodeList)
{ _nodeList.swap(parentNodeList); }
void popNodeList(NodeList& parentNodeList, BVHGroup* transform);
void popNodeList(NodeList& parentNodeList);
SGSharedPtr<BVHNode> getNode() const;
protected:
NodeList _nodeList;
SGSharedPtr<const BVHStaticNode> _staticNode;
private:
SGSphered _sphere;
};
}
#endif
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