/*
 *  ldrawparser.h
 *  legotown3d
 *
 *  Created by Nico Bernold on 08.01.05.
 *  Copyright 2005 __MyCompanyName__. All rights reserved.
 *
 */

#include <iostream>
using namespace std;

#include "stdincl.h"
class Vector;

class HeightMapTerrain
{
public:
	HeightMapTerrain();
	~HeightMapTerrain();	

	bool loadBitmap(char* fileName);
	
	bool createDisplayLists(int width, int height, int levelOfDetail);
	
	bool readIntoList(int left, int top, int width, int height, int levelOfDetail, GLuint displayListNr);

	// how many display lists are there
	int displayListCount;
	
	// tells from which integer our display lists start
	GLuint displayListStart;
	
	// array of display lists
	//GLuint* displayLists;

private:
	// returns the height value between 0 and 256 for a point (x,z) in the picture
	GLint getHeightValue(int x, int z);
	
	// makes a call to glNormal and glVertex for supplied x and z
	void call_glNormal_and_glVertex(int x,int z,int top,int left,int height);

	// holds the loaded pixels
	SDL_Surface* bitmap;
	
	// holds normal vector for every vertex
	Vector* normals;
};