posted 09 October 2006 17:33            

I'm trying to divide the wacom tablet in four parts and have each of the parts track and hold it's own pen functions - So I'll have four virtual tablets, one in each of the four quarters of the one tablet.

I've run into a problem with this expression, which is supposed to track !PenX in the upper right corner of the tablet (and scale what would be 0.5-1 to 0-1):

((!PenX rounded) * (!PenY rounded)) trackAndHold: (!PenX into: #({0.5@0} {1@1}))

It is supposed to hold !PenX's last value when you put the pen down in any of the 3 other quarters. The problem is that it jumps once (and then holds) when you put the pen down in the bottom right corner. The left side doesn't cause a jump.

The anomaly that I'm referring to in the subject heading is that, if I put !PenY in the "into:" part of the expression, it tracks Y values fine and doesn't jump no matter which quarter you then put the pen in.

I've tried a few variations on the same basic idea and can't rid myself of the problem with tracking !PenX. Any insights would be appreciated as always!

posted 09 October 2006 19:56            

(!PenDown * (!PenX rounded) * (!PenY rounded)) trackAndHold: (!PenX into: #({0.5@0} {1@1}))

Have you tried putting the trigger expression and/or the entire expression into a SoundToGlobalController so you can see what values you are getting?

posted 09 October 2006 20:35            

I just tried restarting, and it behaves the same, so I guess it wasn't the sleep problem (I haven't seen that one, I don't think). But adding the !PenDown to the expression solves the problem. Thanks!

I guess it'll remain a mystery. The trigger part worked as expected in a global controller.

I'll put the completed patch on the Tweaky when I'm done with it. I think it's a pretty neat idea.

best,
Phil

posted 24 October 2006 00:17            

It gives you independent global controllers in all four corners of the wacom tablet - like having four wacoms in one (hence the name). Plus some other tricks.