/**
 * 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 fltToEggConverter.h
 * @author drose
 * @date 2001-04-17
 */

#ifndef FLTTOEGGCONVERTER_H
#define FLTTOEGGCONVERTER_H

#include "pandatoolbase.h"

#include "fltToEggLevelState.h"
#include "somethingToEggConverter.h"
#include "fltHeader.h"
#include "eggVertex.h"
#include "eggVertexPool.h"
#include "eggTexture.h"
#include "pt_EggTexture.h"
#include "pt_EggVertex.h"
#include "pointerTo.h"
#include "distanceUnit.h"

class FltRecord;
class FltLOD;
class FltGroup;
class FltObject;
class FltBeadID;
class FltBead;
class FltVertex;
class FltGeometry;
class FltFace;
class FltExternalReference;
class FltTexture;
class EggGroupNode;
class EggPrimitive;

/**
 * This class supervises the construction of an EggData structure from the
 * data represented by the FltHeader.  Reading and writing the egg and flt
 * structures is left to the user.
 */
class FltToEggConverter : public SomethingToEggConverter {
public:
  FltToEggConverter();
  FltToEggConverter(const FltToEggConverter &copy);
  ~FltToEggConverter();

  virtual SomethingToEggConverter *make_copy();

  virtual std::string get_name() const;
  virtual std::string get_extension() const;
  virtual bool supports_compressed() const;

  virtual bool convert_file(const Filename &filename);
  virtual DistanceUnit get_input_units();
  bool convert_flt(const FltHeader *flt_header);

  // Set this true to store transforms in egg files as the fully composed
  // matrix, or false (the default) to keep them decomposed into elemental
  // operations.
  bool _compose_transforms;

private:
  void cleanup();

  typedef pvector< PT_EggVertex > EggVertices;

  void convert_record(const FltRecord *flt_record, FltToEggLevelState &state);
  void dispatch_record(const FltRecord *flt_record, FltToEggLevelState &state);
  void convert_lod(const FltLOD *flt_lod, FltToEggLevelState &state);
  void convert_group(const FltGroup *flt_group, FltToEggLevelState &state);
  void convert_object(const FltObject *flt_object, FltToEggLevelState &state);
  void convert_bead_id(const FltBeadID *flt_bead, FltToEggLevelState &state);
  void convert_bead(const FltBead *flt_bead, FltToEggLevelState &state);
  void convert_face(const FltFace *flt_face, FltToEggLevelState &state);
  void convert_ext_ref(const FltExternalReference *flt_ext, FltToEggLevelState &state);

  void setup_geometry(const FltGeometry *flt_geom, FltToEggLevelState &state,
                      EggPrimitive *egg_prim, EggVertexPool *egg_vpool,
                      const EggVertices &vertices);

  void convert_subfaces(const FltRecord *flt_record, FltToEggLevelState &state);

  bool parse_comment(const FltBeadID *flt_bead, EggNode *egg_node);
  bool parse_comment(const FltBead *flt_bead, EggNode *egg_node);
  bool parse_comment(const FltTexture *flt_texture, EggNode *egg_node);
  bool parse_comment(const std::string &comment, const std::string &name,
                     EggNode *egg_node);

  PT_EggVertex make_egg_vertex(const FltVertex *flt_vertex);
  PT_EggTexture make_egg_texture(const FltTexture *flt_texture);

  CPT(FltHeader) _flt_header;
  DistanceUnit _flt_units;

  PT(EggVertexPool) _main_egg_vpool;

  typedef pmap<const FltTexture *, PT(EggTexture) > Textures;
  Textures _textures;
};

#include "fltToEggConverter.I"

#endif