/*
   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:
*/


#include "vertex_array_model.h"

#define sampleRate 4

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

class HeightMap : public VertexArrayModel
{
public:

void load();
void load(int Mode);
void load(const char*, int Mode);
void scale( Vector V); 
float getHeight(float x, float y); // x,y relative to HeightMap
HeightMap();
HeightMap(const char*);
HeightMap(const char*, const char*);
~HeightMap();


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 ; 
Vector     camCoords;
Material * tmp_mat;
Material* red_mat;
Texture* texture;
const PNode* camera;
float scaleX ;
float scaleY ;
float scaleZ ;
int   cmScaleX;
int   cmScaleY;
bool  hasColourMap;
inline int abs(int val)
{
 if(val < 0) val = -val;
 return val;
}

};