// Filename: collisionLevelState.h
// Created by:  drose (24Apr00)
// 
////////////////////////////////////////////////////////////////////

#ifndef COLLISIONLEVELSTATE_H
#define COLLISIONLEVELSTATE_H

#include <pandabase.h>

#include <luse.h>
#include <pointerToArray.h>
#include <geometricBoundingVolume.h>

#include <list>

class CollisionSolid;
class CollisionNode;

////////////////////////////////////////////////////////////////////
//       Class : CollisionLevelState
// Description : This is the state information the
//               CollisionTraverser retains for each level during
//               traversal.
////////////////////////////////////////////////////////////////////
class CollisionLevelState {
public:
  class ColliderDef {
  public:
    CollisionSolid *_collider;
    CollisionNode *_node;
    LMatrix4f _space;
    LMatrix4f _inv_space;
  };

  void clear();
  void reserve(int max_colliders);
  void prepare_collider(const ColliderDef &def);
  void xform(const LMatrix4f &mat);

  INLINE int get_num_colliders() const;
  INLINE bool has_collider(int n) const;
  INLINE bool has_collider_with_geom(int n) const;
  INLINE bool has_any_collider() const;
  INLINE bool has_any_collide_geom() const;

  INLINE void reached_collision_node();

  INLINE CollisionSolid *get_collider(int n) const;
  INLINE CollisionNode *get_node(int n) const;
  INLINE const LMatrix4f &get_space(int n) const;
  INLINE const LMatrix4f &get_inv_space(int n) const;
  INLINE const GeometricBoundingVolume *get_local_bound(int n) const;

  INLINE void omit_collider(int n);

private:
  typedef int ColliderMask;

  INLINE ColliderMask get_mask(int n) const;

  typedef PTA(ColliderDef) Colliders;
  Colliders _colliders;
  ColliderMask _current;
  ColliderMask _colliders_with_geom;

  typedef PTA(CPT(GeometricBoundingVolume)) BoundingVolumes;
  BoundingVolumes _local_bounds;
};

#include "collisionLevelState.I"

#endif