Inverse ArbitraryPoint

phl · October 1, 2007, 4:26pm

hi there,

is there a possibility to inverse an ArbitraryPoint transformation?
i want to achieve, like my example tries to show, the inverted transformation of some kind of fisheye effect. but possibly without an additional shader.
any ideas/solutions?

thanks,
philipp

kalle · October 1, 2007, 4:32pm

what example? ;^)

phl · October 1, 2007, 4:41pm

args. attaching doesn’t work.
this one

kalle · October 1, 2007, 4:50pm

uh, perhaps ungefähr so:

but i’m not sure at all.

inverse_arbitrarypoint_perhaps.v4p (11.5 kB)

phl · October 1, 2007, 5:22pm

ah, but looks fine, i’ll give it a try. thanks!

phl · October 1, 2007, 5:52pm

hmm doesn’t work properly. the trapeze inverse does strange things (but that can be solved with a 2nd trapeze node) and playing on the attractor pins leads to big scale differences on the two images.

phl · October 7, 2007, 3:32pm

tried to work around this problem, but it came back :(

i attached a patch with more descriptions of the problem, i hope it’s clear enough now.
(perhaps it’s motivation enough that you can see me dancing :D)

inverse_transformation.zip (502.7 kB)