// Filename: eggData.h
// Created by:  drose (20Jan99)
//
////////////////////////////////////////////////////////////////////
//
// 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 EGGDATA_H
#define EGGDATA_H

#include "pandabase.h"

#include "eggGroupNode.h"
#include "filename.h"
#include "coordinateSystem.h"
#include "pnotify.h"
#include "dSearchPath.h"

class BamCacheRecord;

////////////////////////////////////////////////////////////////////
//       Class : EggData
// Description : This is the primary interface into all the egg data,
//               and the root of the egg file structure.  An EggData
//               structure corresponds exactly with an egg file on the
//               disk.
//
//               The EggData class inherits from EggGroupNode its
//               collection of children, which are accessed by using
//               the EggData itself as an STL container with begin()
//               and end() calls.  The children of the EggData class
//               are the toplevel nodes in the egg file.
////////////////////////////////////////////////////////////////////
class EXPCL_PANDAEGG EggData : public EggGroupNode {
PUBLISHED:
  INLINE EggData();
  INLINE EggData(const EggData &copy);
  INLINE EggData &operator = (const EggData &copy);

  static bool resolve_egg_filename(Filename &egg_filename,
                                   const DSearchPath &searchpath = DSearchPath());

  bool read(Filename filename, string display_name = string());
  bool read(istream &in);
  void merge(EggData &other);

  bool load_externals(const DSearchPath &searchpath = DSearchPath());
  bool load_externals(const DSearchPath &searchpath, BamCacheRecord *record);
  int collapse_equivalent_textures();
  int collapse_equivalent_materials();

  bool write_egg(Filename filename);
  bool write_egg(ostream &out);

  INLINE void set_auto_resolve_externals(bool resolve);
  INLINE bool get_auto_resolve_externals() const;
  INLINE bool original_had_absolute_pathnames() const;

  void set_coordinate_system(CoordinateSystem coordsys);
  INLINE CoordinateSystem get_coordinate_system() const;

  INLINE void set_egg_filename(const Filename &egg_filename);
  INLINE const Filename &get_egg_filename() const;

  INLINE void recompute_vertex_normals(double threshold);
  INLINE void recompute_polygon_normals();
  INLINE void strip_normals();

protected:
  virtual void write(ostream &out, int indent_level = 0) const;

private:
  void post_read();
  void pre_write();

  bool _auto_resolve_externals;
  bool _had_absolute_pathnames;
  CoordinateSystem _coordsys;
  Filename _egg_filename;

public:
  static TypeHandle get_class_type() {
    return _type_handle;
  }
  static void init_type() {
    EggGroupNode::init_type();
    register_type(_type_handle, "EggData",
                  EggGroupNode::get_class_type());
  }
  virtual TypeHandle get_type() const {
    return get_class_type();
  }
  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}

private:
  static TypeHandle _type_handle;
};

#include "eggData.I"

#endif
