import org.lwjgl.opengl.*;
import org.lwjgl.Sys;


public class display {

    public static void main(String[] argv) {
//	 in this case we only care about the dimensions of the screen, we're aiming
//	 for an 800x600 display.
	int targetWidth = 800;
	int targetHeight = 600;
	 
	DisplayMode chosenMode = null;
	
	 
	try 
	{
	     DisplayMode[] modes = Display.getAvailableDisplayModes();
	 
	     for (int i=0;i<modes.length;i++) 
	     {
	          if ((modes[i].getWidth() == targetWidth) && (modes[i].getHeight() == targetHeight)) 
	          {
	               chosenMode = modes[i];
	               break;
	          }
	     
	     } 
	}
	     catch (LWJGLException e) {     
	     Sys.alert("Error", "Unable to determine display modes.");
	     System.exit(0);
	}
	 
//	 at this point if we have no mode there was no appropriate, let the user know 
//	 and give up
	if (chosenMode == null) 
	{
	     Sys.alert("Error", "Unable to find appropriate display mode.");
	     System.exit(0);
	}
	try
	{
	    Display.setDisplayMode(chosenMode);
	    Display.setTitle("An example title");
	    Display.create();
	} 
	catch (LWJGLException e) 
	{
	    Sys.alert("Unable to create display.", "o");
	    System.exit(0);
	}
	 
//	 go on to do any initialisation of OpenGL here, for example loading textures
//	 or setting up basic global settings 
	GL11.glClearColor(0,0,0,0);
	boolean gameRunning = true;
	float pos = 0;
	 
	while (gameRunning) 
	{
	     // perform game logic updates here
	     pos += 0.01f;    
	     
	     // render using OpenGL 
	     GL11.glBegin(GL11.GL_QUADS);
	          GL11.glVertex3f(0,0,pos);
	          GL11.glVertex3f(1,0,pos);
	          GL11.glVertex3f(1,1,pos);
	          GL11.glVertex3f(0,1,pos);
	     GL11.glEnd();
	 
	     // now tell the screen to update
	     Display.update();
	 
	     // finally check if the user has requested that the display be 
	     // shutdown
	     if (Display.isCloseRequested()) 
	     {
	           gameRunning = false;
	           Display.destroy();
	           System.exit(0);
	     }
	}
    }
}