SceneGraph.h

//
// SceneGraph.h
//

#ifndef __SCENE_GRAPH_H__
#define __SCENE_GRAPH_H__

#include "GameObject.h"
#include "ObjectList.h"
#include "ViewObject.h"

#define MAX_ALTITUDE 4
#define MAX_LEVEL 10  // objects on level 0 are persistent

class SceneGraph {

 protected:
  int level;                    ///< "Level" the game is on
  ObjectList game_objects[MAX_LEVEL+1];
  ObjectList solid_game_objects[MAX_LEVEL+1];
  ObjectList visible_game_objects[MAX_LEVEL+1][MAX_ALTITUDE+1];
  ObjectList view_objects[MAX_LEVEL+1];
  ObjectList visible_view_objects[MAX_LEVEL+1];

 public:
  SceneGraph();
  ~SceneGraph();

  /// Insert/remove objects
  int removeObject(GameObject *p_go);
  int removeObject(ViewObject *p_vo);
  int insertObject(GameObject *p_go);
  int insertObject(ViewObject *p_vo);

  /// Return GameObjects. Empty list if none.
  ObjectList gameObjects();
  ObjectList solidGameObjects();
  ObjectList visibleGameObjects(int altitude);

  /// Return ViewObjects. Empty list if none.
  ObjectList viewObjects();
  ObjectList visibleViewObjects();

  /// Return current game level.
  int getLevel();

  /// Set game level. Return 0 if ok, else -1.
  int setLevel(int new_level);

  /// Re-position object in SceneGraph to new altitude.
  /// Return 0 if ok, else -1.
  int updateAltitude(GameObject *p_go, int new_alt);

  // Re-position object in SceneGraph based on properties.
  // Return 0 if ok, else -1.
  int updateSolidness(GameObject *p_go, Solidness new_solidness);
  int updateVisibility(ViewObject *p_go, bool new_visibility);
  int updateVisibility(GameObject *p_vo, bool new_visibility);
  int updatePersistence(GameObject *p_go, bool new_persistence);
  int updatePersistence(ViewObject *p_vo, bool new_persistence);
};

#endif // __SCENE_GRAPH_H__