Forums » Impact Engine » Bug report: Weltmeister zoom erratic with Apple magic mouse

If you are using the Apple Magic Mouse (wireless with touch surface) with Weltmeister, you can't really use mouse wheel zoom because it instantly zooms either all the way in or all the way out.

I think this is because this mouse sends out many different "step" signals when you swipe your finger up and down. Possibly other mouses that use inertia scrolling could be affected.

Not sure how you would go about mitigating this; even with inertia scrolling disabled and the scroll speed turned all the way down, it's still erratic.

Interesting, this only effects Safari; it's fine in Firefox.

Confirm that this happens and is very, very annoying :(

The only way I managed to work around this was to disable vertical scrolling entirely, this article worked for me on Mavericks: http://macmint.com/how-to-disable-magic-mouse-scrolling/

A better workaround I've been rolling with is to edit lib/weltmeister/config.js and set the zoomMax and zoomMin variables to be the same as zoom. This effectively disables zooming, just make sure you set them all to a value that works with your game!