is there any expression that can map values from one range to another range. ‘fit’ expression only can do linear mapping, i'm looking more advance expression similar to ‘driven key’ in maya. with ‘driven key’, i can do a non-linear mapping. example : map 0,5,10 to 0,30,10000. the ‘fit’ can only map 0,5 to 0,30
anyone can help?

thx,
clay~

Lookup CHOP might be useful. It uses a channel to lookup values in another.

Dragos

Try using the chf() function… type exhelp chf in the textport.

Create a spare channel or a param of an hda, set keyframes on this channel or put expressions into or however you want to define the function.

Then reference it with something like chf(“../myFunctionChannel”, ch(“../myInputChannel”))

This is a roll your own version of maya's driven keys.

Hope this helps,
Rangi.