/*
   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: bottac@ee.ethz.ch
*/


#include "vertex_array_model.h"


#define texRate      32
#define texRatef     4.0f
#define tileSize     64

class SDL_Surface;
class Vector;
class Material;
class PNode;
class Texture;
class HeightMap;

class Tile
{
public:
void draw();
void drawHighRes();
void drawLowRes();
int getRes();
int setHighRes(bool b);
Tile(int i1, int j1, int i2, int j2, HeightMap* hm ) ;
Tile();
float x;
float z;
virtual ~Tile();



private:
HeightMap* hmref;
VertexArrayModel* highResModel;
VertexArrayModel* lowResModel;
int highRes;
int lowRes;
void load(int i1, int j1, int i2, int i2, HeightMap* hm, VertexArrayModel* model, int Res);
};

class HeightMap : public VertexArrayModel
{
public:
void draw();
void load();
void load(int Mode);
void load(const std::string&, int Mode);
void scale( Vector V);
void setAbsCoor(Vector V);
float getHeight(float x, float y);
float getNormal(float x, float y);
HeightMap();
HeightMap(const std::string&);
HeightMap(const std::string&, const std::string&);
virtual ~HeightMap();

friend class Tile;

private:
SDL_Surface* heightMap;
SDL_Surface* colourMap;
unsigned char* heights;
unsigned char* colours;

void generateNormalVectorField();
void drawRect(int xBottomLeft, int yBottomLeft, int xTopRight, int yTopRight );
void fixBoarder(int xBottomLeft, int yBottomLeft, int xTopRight, int yTopRight);
Vector  **  normalVectorField ;
Tile    ***  tiles;
Vector    camCoords;
Vector offsetCoords;
Material * tmp_mat;
Material* red_mat;
Texture* texture;
const PNode* camera;
float scaleX ;
float scaleY ;
float scaleZ ;
float shiftX ; // to be removed
float shiftY ; // to be removed
float shiftZ ; // to be removed
float offsetX;
float offsetY;
float offsetZ;
int   cmScaleX;
int   cmScaleY;
bool  hasColourMap;

inline int abs(int val)
{
 if(val < 0) val = -val;
 return val;
}
inline int max(int x, int y)
{
 return (x>y)? x:y;
}
inline int min(int x, int y)
{
return (x<y)? x: y;
}
};