/**
 * 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."
 *
 * @file deferredNodeProperty.h
 * @author drose
 * @date 2002-03-20
 */

#ifndef DEFERREDNODEPROPERTY_H
#define DEFERREDNODEPROPERTY_H

#include "pandabase.h"

#include "collideMask.h"
#include "pmap.h"

class PandaNode;

/**
 * This class keeps track of all the state we must make note of during the
 * graph traversal, but cannot apply immediately.  An instance of this class
 * may be assigned to nodes as they are created, and then later, after the
 * geometry has been created, the graph will be traversed again and the state
 * will be applied.
 *
 * This class is only local to this package; it is not exported.
 */
class DeferredNodeProperty {
public:
  DeferredNodeProperty();
  DeferredNodeProperty(const DeferredNodeProperty &copy);
  void operator = (const DeferredNodeProperty &copy);

  void compose(const DeferredNodeProperty &other);

  void apply_to_node(PandaNode *node);


public:
  enum Flags {
    F_has_from_collide_mask   = 0x0001,
    F_has_into_collide_mask   = 0x0002,
  };

  int _flags;
  CollideMask _from_collide_mask;
  CollideMask _into_collide_mask;
};

typedef pmap<PandaNode *, DeferredNodeProperty> DeferredNodes;


#endif