I'm still having trouble getting the mouse wheel to control the zoom. It doesn't seem to deal well with feedback loops. I want to get a value, add the scroll wheel delta, and put it back in that value. But even watching for triggers, I haven't gotten it to work cleanly. Seems to add the number a bunch of times in a loop.

For now, I'll just use right-mouse-down with vertical position for the zoom.

So I have left-mouse-down to drag the box around the screen and right-mouse-down to change the zoom. It's working well enough, but it seems kinda hard to get the mouse wheel controls to do what I'm looking for.

That's so cool. I love these little tricks. I guess most actors retain their values, so using a gate just to hold the value, not as an actual gate in this case. I can do that. 

I'm just starting to set up for a new show, so wanted to make it easy to quickly move things around in these early rehearsals so I can get quick turnaround for the designs. I'm having a blast with this stuff.

Thanks for your help,

Bernie

Use another actor like a Gate as a go-between and change the projector's zoom by changing the value in the Gate. That way you can use the output of the Gate actor as a way to monitor the zoom input of the Projector.

Best wishes,

Woland