Or you could probably use vertex colours/weights if you did not want to
see a gradient across the object.
Andi Farhall wrote:
As a cheap'n'sleazy sidestep (depending on your application) I
occasionally use a big planar texture projection applied to a group of
objects and have a gradient in the render tree to do this sort of thing.
Andi
-----Original Message-----
From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf
Of Klemens Kopetzky
Sent: Wednesday, April 26, 2006 4:15 PM
To: XSI(at)Softimage.COM
Subject: expression/material question
Hello all you gurus out there!
I am by no means a programmer. But I believed my understanding is enough
for a tiny expression here and there - till now ;-).
I have a scene with quite some objects sharing all the same material as
a shared property. Within this material I want to drive a value of a
colour correction node by the local z position auf each object. Leading
to differently coloured objects depending on their height in the scene.
Setting an expression for the appropriate parameter using
"this.kine.local.posz" doesn't work. I think it's because the shared
material doesn't belong to the object, so "this"does not point to the
object. However this expression works if it is a local material and
isn't shared by another object.
I am able to make a local copy of the material and add an appropriate
expression to that material for my objects with a script. But that
results in quite a couple of materials, which I find is quite a mess to
tweak if changes need to be done. Is there a solution to tell XSI it
should consider the position of the object the shared material is
currently applied to?
I hope I didn't write to confusing. Please feel free to insult me
because of such a newbie scripting question ;-)
Thanks for your help
Klemens
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