source: orxonox.OLD/branches/height_map/src/lib/graphics/importer/height_map.cc @ 5976

/*
   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 "height_map.h"
#include "model.h"
#include "texture.h"
#include "vector.h"

#include "debug.h"

// INCLUDING SDL_Image
#ifdef HAVE_SDL_IMAGE_H
#include <SDL_image.h>
#else
#include <SDL/SDL_image.h>
#endif

HeightMap::HeightMap() : Model()
{
        
}

HeightMap::HeightMap(const char* height_map_name = NULL) : Model()
{
   this->setClassID(CL_HEIGHT_MAP, "HeightMap");
        heightMap =  IMG_Load(height_map_name);
            if(heightMap!=NULL) {
                 PRINTF(0)("loading Image %s\n", height_map_name);
                 PRINTF(0)("width : %i\n", heightMap->w);
                 PRINTF(0)("hight : %i\n", heightMap->h);
                 PRINTF(0)("%i Byte(s) per Pixel \n", heightMap->format->BytesPerPixel);

                
                }
                 
            else       PRINTF(4)("oops! couldn't load %s for some reason.\n", height_map_name);
}


HeightMap::~HeightMap()
{
        delete heightMap;
}

void HeightMap::load()
{
 long height = 0; 
 int offset = 0;
 char *  bmp = (char*) heightMap->pixels;

  if(heightMap != NULL /* && heightMap->format->BitsPerPixel == 8 */)
        {
SDL_LockSurface(heightMap);
                for(int i = 0; i < heightMap->h -1; i += 2)
                        {
                        for(int j = 0; j < heightMap->w -1;  j += 2)
                        {

                                // get local hight from heightMap

                                
                                
                                        offset = bmp[j + i*heightMap->w];
                                        height = heightMap->format->palette->colors[offset].r + heightMap->format->palette->colors[offset].g + heightMap->format->palette->colors[offset].b ;
                                        
                                this->addVertex(heightMap->h - i , ((long)( height) / 30) - 60 ,heightMap->w - j);
                        }       
                        }
SDL_UnlockSurface(heightMap);
                for(int i = 0; i < (heightMap->h * heightMap->w)/4   -1  ; i ++)
                        {
                                 this->addFace (3, VERTEX_ONLY, i,i+1 ,i + (heightMap->w / 2) );
                                
                                  this->addFace (3, VERTEX_ONLY,i + (heightMap->w / 2)  ,i + (heightMap->w / 2) +1, i+1 );
                                

                                //this->addFace (4 ,VERTEX_ONLY,i,i + (heightMap->w / 2)  ,i + (heightMap->w / 2) +1, i+1 );
                        }
                

        }
  else
        { 
  //this->setName("HardCore");
  this->addVertex (-0.5, -0.5, 0.5);
  this->addVertex (0.5, -0.5, 0.5);
  this->addVertex (-0.5, 0.5, 0.5);
  this->addVertex (0.5, 0.5, 0.5);
  this->addVertex (-0.5, 0.5, -0.5);
  this->addVertex (0.5, 0.5, -0.5);
  this->addVertex (-0.5, -0.5, -0.5);
  this->addVertex (0.5, -0.5, -0.5);
        



  this->addFace (3, VERTEX_ONLY, 4, 3, 2);

        }
      this->finalize();


}