void ctile::init ( SDL_Surface* screen_surface, int _x, int _y, TILE_TYPE _type )
// initializes the tile
{
	// initialize the sprite
	switch ( _type )
	{
		case tile_grass:
			sprite.init ( screen_surface, "tiles/grass.bmp" );
		break;
		case tile_concrete:
			sprite.init ( screen_surface, "tiles/concrete.bmp" );
		break;
		case tile_dirt:
			sprite.init ( screen_surface, "tiles/dirt.bmp" );
		break;
		case tile_grass_ramp_x:
			sprite.init ( screen_surface, "tiles/grass_ramp_x.bmp" );
		break;
		case tile_grass_ramp_y:
			sprite.init ( screen_surface, "tiles/grass_ramp_y.bmp" );
		break;
		case tile_grass_ramp_xy:
			sprite.init ( screen_surface, "tiles/grass_ramp_xy.bmp" );
		break;
		case tile_rail_y:
			sprite.init ( screen_surface, "tiles/rail_y.bmp" );
		break;
		default:
		break;
	}	

	// position the tile
	sprite.x = ( float ) _x;
	sprite.y = ( float ) _y;

	// save position
	x = _x;
	y = _y;

	// save type
	type = _type;
}

void ctile::draw ( void )
// draws the tile
{
	if ( type != tile_empty )
	// if the tile is not empty
		// draw the sprite
		sprite.draw ( x, y );
}

void csprite::init ( SDL_Surface* screen_surface, const char *filename, int _width, int _height )
// initializes the sprite
{
	// load the bitmap
	bitmap = SDL_LoadBMP ( filename );

	// set the sprites surface to screen_surface
	surface = screen_surface;

	if ( bitmap == NULL )
	// if there was an error
		return_error ( "Failed to initialize sprite..." );

	// set up other variables
	width = _width;
	height = _height;
}

void csprite::draw ( )
// draws the sprite to the screen
{
	// create a source rectangle
	SDL_Rect source;
	source.x = 0;
	source.y = 0;
	source.w = bitmap->w;
	source.h = bitmap->h;
	
	// create a destination rectangle
	SDL_Rect destination;
	destination.x = ( int ) x;
	destination.y = ( int ) y;
	destination.w = width;
	destination.h = height;
	
	// activate color keying
	/*if ( !*/SDL_SetColorKey ( bitmap, SDL_SRCCOLORKEY, SDL_MapRGB ( bitmap->format, 255, 0, 128 ) ); //)
	// if there was an error
		//return_error ( "Failed to colorkey sprite..." );

	// blit the bitmap to the screen
	/*if ( !*/SDL_BlitSurface ( bitmap, &source, surface, &destination );// )
	// if there was an error
		//return_error ( "Failed to draw sprite..." );
}

void csprite::draw ( float _x, float _y )
// draws the sprite to the screen at a given location
{
	// position the sprite
	x = _x;
	y = _y;
	
	// draw it
	draw ( );
}

void cwindow::create ( const char* title, const char* filename )
// creates the window
{
	// load the settings
	load_settings ( filename );

	// initialize systems
	SDL_Init ( SDL_INIT_VIDEO );
	atexit ( SDL_Quit );

	if ( fullscreen )
	// if we want a fullscreen window
		// create a fullscreen window
		surface = SDL_SetVideoMode ( width, height, bpp, SDL_SWSURFACE | SDL_ANYFORMAT | SDL_FULLSCREEN );

	if ( !fullscreen )
	// if we don't want a fullscreen window
		// create a windowed window
		surface = SDL_SetVideoMode ( width, height, bpp, SDL_SWSURFACE | SDL_ANYFORMAT );

	if ( surface == NULL )
	// if there was an error
		return_error ( "Failed to create window..." );

	// set window title
	SDL_WM_SetCaption ( title, NULL );

	// store screen dimensions
	screen_width = width;
	screen_height = height;
	
	// hide standard mouse cursor
	//SDL_ShowCursor ( SDL_DISABLE );
}

void cwindow::clear ( void )
// clears the window
{
	// clear the window
	SDL_FillRect ( surface, NULL, 0 );
}

void cwindow::update ( void )
// updates the window
{
	// update the window
	SDL_Flip ( surface );
}

	// Loading the image	SDL_Surface * tmp = SDL_LoadBMP( filename );    	if( !tmp )    	{       		// something's wrong    	}		SDL_Surface * optSurface = NULL;    	optSurface = SDL_DisplayFormat( tmp );    	if( !optSurface )    	{        	//something's wrong    	}	// Don't forget this		SDL_FreeSurface( tmp );

void csprite::init ( SDL_Surface* screen_surface, const char *filename, int _width, int _height )// initializes the sprite{	SDL_Surface* temp = NULL;	// load the bitmap	temp = SDL_LoadBMP ( filename );	if( !temp )    {		//something's wrong	}	    bitmap = SDL_DisplayFormat ( temp );	if ( bitmap == NULL )	// if there was an error		return_error ( "Failed to initialize sprite..." );   	// Don't forget this		SDL_FreeSurface ( temp );	// set the sprites surface to screen_surface	surface = screen_surface;	// set up other variables	width = _width;	height = _height;}

void csprite::init ( const char *filename, int _width, int _height )// initializes the sprite{	SDL_Surface* temp = NULL;	// load temp	temp = SDL_LoadBMP ( filename );	if ( temp == NULL )	// if there was an error		return_error ( "Failed to initialize sprite..." );	// load the bitmap    bitmap = SDL_DisplayFormat ( temp );	if ( bitmap == NULL )	// if there was an error		return_error ( "Failed to initialize sprite..." );   	// free temp		SDL_FreeSurface ( temp );	// activate color keying	//if ( !SDL_SetColorKey ( bitmap, SDL_SRCCOLORKEY, SDL_MapRGB ( bitmap->format, 255, 0, 128 ) ) )	// if there was an error		//return_error ( "Failed to colorkey sprite..." );	// set up other variables	width = _width;	height = _height;}