title: Creating new objects with Game Maker GML
body: <p>I'd like to know if there's a way to check if an object exists on a point, and if not, create a new one while snapping the new object to a grid? I know you can use this <code>instance_create(x,y,obj_to_create);</code> but that just places on a point no matter what and doesn't snap to a grid. Also, is there a global mouse click event in Game Maker?
  <br />Thanks!</p>