// Filename: cullPlanes.h
// Created by:  drose (23Aug05)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) Carnegie Mellon University.  All rights reserved.
//
// All use of this software is subject to the terms of the revised BSD
// license.  You should have received a copy of this license along
// with this source code in a file named "LICENSE."
//
////////////////////////////////////////////////////////////////////

#ifndef CULLPLANES_H
#define CULLPLANES_H

#include "pandabase.h"
#include "referenceCount.h"
#include "nodePath.h"
#include "boundingHexahedron.h"
#include "boundingPlane.h"
#include "pointerTo.h"
#include "luse.h"
#include "deletedChain.h"

class ClipPlaneAttrib;
class OccluderEffect;

////////////////////////////////////////////////////////////////////
//       Class : CullPlanes
// Description : This represents the set of clip planes and/or
//               occluders that are definitely in effect for the
//               current node of the CullTraverserData, as well as on
//               all child nodes.  Any clip planes and occluders in
//               this list may be safely culled against.
//
//               This does not include the clip planes that are in
//               effect now, but might later be turned off by a child
//               node, since we can't safely cull against such clip
//               planes.
//
//               The bounding volumes in this object are transformed
//               for each level of the scene graph.
////////////////////////////////////////////////////////////////////
class EXPCL_PANDA_PGRAPH CullPlanes : public ReferenceCount {
protected:
  INLINE CullPlanes();
  INLINE CullPlanes(const CullPlanes &copy);
  INLINE void operator = (const CullPlanes &copy); 

public:
  INLINE ~CullPlanes();
  ALLOC_DELETED_CHAIN(CullPlanes);

  INLINE bool is_empty() const;

  static CPT(CullPlanes) make_empty();
  CPT(CullPlanes) xform(const LMatrix4 &mat) const;
  CPT(CullPlanes) apply_state(const CullTraverser *trav, 
                              const CullTraverserData *data,
                              const ClipPlaneAttrib *net_attrib,
                              const ClipPlaneAttrib *off_attrib,
                              const OccluderEffect *node_effect) const;
  CPT(CullPlanes) do_cull(int &result, CPT(RenderState) &state,
                          const GeometricBoundingVolume *node_gbv) const;

  CPT(CullPlanes) remove_plane(const NodePath &clip_plane) const;
  CPT(CullPlanes) remove_occluder(const NodePath &occluder) const;

  void write(ostream &out) const;

private:
  typedef pmap<NodePath, PT(BoundingPlane) > Planes;
  Planes _planes;

  typedef pmap<NodePath, PT(BoundingHexahedron) > Occluders;
  Occluders _occluders;
};

#include "cullPlanes.I"

#endif
