Currently, client/MouseDown() only functions over specific places. Most importantly, it doesn't function over the black space around maps (when an un-stretched map doesn't fill the entire control, for example). This is quite undesirable, and especially hindering when trying to make a sort of shooter.
client/MouseUp(), however, will function everywhere, even if your mouse is completely outside of the BYOND game's window.
Sep 9 2011, 7:18 pm