source: orxonox.OLD/orxonox/trunk/src/lib/graphics/importer/md2Model.h @ 4607

/*! 
    \file md2Model.h
    \brief Definition of an MD2 Model, a model format invented by ID Software.
    
    We are deeply thankfull for all the wunderfull things id software made for us gamers!
    
    The md2 file format is structured in a very simple way: it contains animations which are made out of
    frames (so called keyframes). Each frame is a complete draweable model in a specific position.
    A frame is a collection of vertex and its compagnions (normals, texture coordinates).
    
    A typical model has about 200 frames, the maximum frame count is fixed by MD2_MAX_FRAMES to currently 
    512 frames. The maximal vetices count is set to 2048 verteces, not enough?
    You just have to change the MD2_MAX_* values if it doesn't fit your purposes...
    
    Surface Culling is fully implemented in md2 models: quake2 uses front face culling.
*/

#ifndef _MD2MODEL_H
#define _MD2MODEL_H

#include "abstract_model.h"
#include "base_object.h"
#include "stdincl.h"


//! These are the needed defines for the max values when loading .MD2 files
#define MD2_IDENT                       (('2'<<24) + ('P'<<16) + ('D'<<8) + 'I') //!< the md2 identifier tag in the bin file
#define MD2_VERSION                     8                                        //!< the md2 version in the header
#define MD2_MAX_TRIANGLES               4096                                     //!< maximal triangles count
#define MD2_MAX_VERTICES                2048                                     //!< maximal vertices count
#define MD2_MAX_TEXCOORDS               2048                                     //!< maximal tex coordinates
#define MD2_MAX_FRAMES                  512                                      //!< maximal frames
#define MD2_MAX_SKINS                   32                                       //!< maximal skins
#define MD2_MAX_FRAMESIZE               (MD2_MAX_VERTICES * 4 + 128)             //!< maximal framesize

#define NUM_VERTEX_NORMALS              162                                      //!< number of vertex normals
#define SHADEDOT_QUANT                  16                                       //!< shade dot quantity - no idea what it is

//! This stores the speed of the animation between each key frame - currently conflicting with the animation framework
#define kAnimationSpeed                 12.0f                                    //!< animation speed

//! This holds the header information that is read in at the beginning of the file: id software definition
struct MD2Header
{ 
   int ident;                           //!< This is used to identify the file
   int version;                         //!< The version number of the file (Must be 8)
    
   int skinWidth;                       //!< The skin width in pixels
   int skinHeight;                      //!< The skin height in pixels
   int frameSize;                       //!< The size in bytes the frames are
   
   int numSkins;                        //!< The number of skins associated with the model
   int numVertices;                     //!< The number of vertices (constant for each frame)
   int numTexCoords;                    //!< The number of texture coordinates
   int numTriangles;                    //!< The number of faces (polygons)
   int numGlCommands;                   //!< The number of gl commands
   int numFrames;                       //!< The number of animation frames
   
   int offsetSkins;                     //!< The offset in the file for the skin data
   int offsetTexCoords;                 //!< The offset in the file for the texture data
   int offsetTriangles;                 //!< The offset in the file for the face data
   int offsetFrames;                    //!< The offset in the file for the frames data
   int offsetGlCommands;                //!< The offset in the file for the gl commands data
   int offsetEnd;                       //!< The end of the file offset
};


//! animation names enumeration
typedef enum animType
  {
    STAND,
    RUN,
    ATTACK,
    PAIN_A,
    PAIN_B,
    PAIN_C,
    JUMP,
    FLIP,
    SALUTE,
    FALLBACK,
    WAVE,
    POINTT,
    CROUCH_STAND,
    CROUCH_WALK,
    CROUCH_ATTACK,
    CROUCH_PAIN,
    CROUCH_DEATH, 
    DEATH_FALLBACK,
    DEATH_FALLFORWARD,
    DEATH_FALLBACKSLOW,
    BOOM,
  
    MAX_ANIMATIONS
  };



/* forward definitions */
class Material;



//! class to store the md2 data in
class MD2Data
{
 public:
  MD2Data(const char* modelFileName, const char* skinFileName);
  virtual ~MD2Data();

 private:
  bool loadModel(const char* fileName);
  bool loadSkin(const char* fileName = NULL);

 public:
  int                numFrames;             //!< number of frames   
  int                numVertices;           //!< number of vertices
  int                numTriangles;          //!< number of triangles
  int                numGLCommands;         //!< number of gl commands in the glList (tells how to draw)
  char*              fileName;              //!< file name of the model File
  char*              skinFileName;          //!< file name of the skin file
  MD2Header*         header;                //!< the header file

  sVec3D*            pVertices;             //!< pointer to the vertices data block
  int*               pGLCommands;           //!< pointer to the gllist data block
  int*               pLightNormals;         //!< pointer to the light normals

  Material*          material;              //!< pointer to the material 
  float              scaleFactor;           //!< the scale factor of the model, (global)
};


//! This is a MD2 Model class
class MD2Model : public AbstractModel {

public:
  MD2Model(const char* modelFileName, const char* skinFileName = NULL);
  virtual ~MD2Model();
   
  void draw();
  
  void setAnim(int type);
  /**
     \brief scales the current model 
     \param scaleFactor: the factor [0..1] to use for scaling
  */
  void scaleModel(float scaleFactor) { this->scaleFactor = scaleFactor;}

  void tick(float dtS);
  void debug();


private:
  void animate();  
  void processLighting();
  void interpolate(sVec3D* verticesList);
  void renderFrame();

 public:
  /* these variables are static, because they are all the same for every model */
  static sVec3D       anorms[NUM_VERTEX_NORMALS];       //!< the anormals
  static float        anormsDots[SHADEDOT_QUANT][256];  //!< the anormals dot products
  static sAnim        animationList[21];                //!< the anomation list

 private:
  MD2Data*            data;                             //!< the md2 data pointer

  float               scaleFactor;                      //!< the scale factor (individual)
  sAnimState          animationState;                   //!< animation state of the model
};





#endif /* _MD2MODEL_H */