/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: Patrick Boenzli
   co-programmer:
*/

/*!
 * @file model.h
 *  Definition of an abstract model.
 *  containing all needed for other models
 */

#ifndef _MODEL_H
#define _MODEL_H

#include "base_object.h"
#include "vector.h"


//! holds the information about a triangle
typedef struct
{
  unsigned int   indexToVertices[3];   //!< index to the vertices of the triangle
  unsigned int   indexToNormals[3];    //!< index to the normals of the triangle
  unsigned int   indexToTexCoor[3];    //!< index to the texture coordinates
} sTriangleExt;


//! Model Information definitions
typedef struct
{
  unsigned int     numVertices;          //!< number of Vertices in the Model
  unsigned int     numTriangles;         //!< number of triangles in the Model
  unsigned int     numNormals;           //!< how many Normals in the Model
  unsigned int     numTexCoor;           //!< how many Texture Coordinates in the Model

  const float*     pVertices;            //!< array of the Vertices
  sTriangleExt*    pTriangles;           //!< array of all triangles
  const float*     pNormals;             //!< array of the Normals
  const float*     pTexCoor;             //!< array of the Texture Coordinates

} modelInfo;


//! skeleton informations for all mount points
typedef struct
{
  std::string      name;                 //!< the name of the mount point
  Vector           up;                   //!< the up vector
  Vector           forward;              //!< the forward vector
  Vector           center;               //!< the center vector
} mountPointSkeleton;



//! This class defines the basic components of a model
class Model : virtual public BaseObject {
  ObjectListDeclaration(Model);

  typedef std::list<mountPointSkeleton>   mpList;

  public:
    virtual ~Model();

    virtual void draw() const;

    inline const modelInfo* getModelInfo() const { return &this->pModelInfo; }

    /** @returns a Pointer to the Vertex-Array, if it was deleted it returns NULL */
    inline const float* getVertexArray() const { return this->pModelInfo.pVertices; };
    /** @returns the VertexCount of this Model */
    inline unsigned int getVertexCount() const { return this->pModelInfo.numVertices; };

    /** @returns a Pointer to the Normals-Array, if it was deleted it returns NULL */
    inline const float* getNormalsArray() const { return this->pModelInfo.pNormals; };
    /** @returns the NormalsCount of this Model */
    inline unsigned int getNormalsCount() const { return this->pModelInfo.numNormals; };

    /** @returns a Pointer to the TexCoord-Array, if it was deleted it returns NULL */
    inline const float* getTexCoordArray() const { return this->pModelInfo.pTexCoor; };
    /** @returns the TexCoord-Count of this Model */
    inline unsigned int getTexCoordCount() const { return this->pModelInfo.numTexCoor; };

    /** @returns the Array of triangles */
    inline sTriangleExt* getTriangles() const { return this->pModelInfo.pTriangles; };
    /** @returns the Count of Faces of this Model */
    inline unsigned int getTriangleCount() const { return this->pModelInfo.numTriangles; };

    /** function to extract the mount points from the model data */
    virtual void extractMountPoints() {}
    /** @returns a list of mounting points */
    inline const mpList& getMountPoints() const { return this->mountPoints; }
    /** adds a mounting point to the model @param up up vector @param forward forward vector @param center center vector */
    inline void addMountPoint(const Vector& up, const Vector& forward, const Vector& center, const std::string& name)
    { mountPointSkeleton mps; mps.up = up; mps.forward = forward; mps.center = center; mps.name = name; }


  protected:
    Model();


  protected:
    modelInfo                        pModelInfo;      //!< Reference to the modelInfo
    mpList                           mountPoints;     //!< a list of all mounting point skeletons
};

#endif /* _MODEL_H */