code: package ontology.effects.unary;
  
  import core.vgdl.VGDLSprite;
  import core.content.InteractionContent;
  import core.game.Game;
  import ontology.effects.Effect;
  
  /**
   * Created with IntelliJ IDEA.
   * User: Diego
   * Date: 04/11/13
   * Time: 15:57
   * This is a Java port from Tom Schaul's VGDL - https://github.com/schaul/py-vgdl
   */
  public class KillIfNotUpright extends Effect
  {
  	
      public KillIfNotUpright(InteractionContent cnt)
      {
          is_kill_effect = true;
          this.parseParameters(cnt);
      }
  
      @Override
      public void execute(VGDLSprite sprite1, VGDLSprite sprite2, Game game)
      {
      	double current_rotation = ((sprite1.rotation+2*Math.PI)%(2*Math.PI));
      	if (!(current_rotation < 5.0 && current_rotation > 4.4)){
      		game.killSprite(sprite1, false);
      	}
      }
  }
  