Hello. I'm pretty novice still to maya API and I am looking for a solution to an issue I recently came across. Any recommendations would be greatly appreciated..
The question is not entirely python based, but I suspect some of you out
there with great API experience may know of a potential solution.
I need to sample the colour of a texture that is the product of a number of
ramps, file textures etc combined using maya utility nodes. Originally all
I needed was a ramp controlled by an animation rig, and sampling the colour
of the texture at a particular U and V position was easy enough using :
cmds.getAttr ("combinedColourRamp.color") or cmds.colorAtPoint.
The problem however comes when I create a resulting texture by including
utilities. The commands that previously worked no longer do.
Is there a way that I can pipe a resulting outColor/texture into a node
that can be sampled, or is there anything accessible from the API that wont
fall over? The colour sampling is used in an expression (hence the mel
syntax). Hoping someone can point me in the right direction..
Thanks
Gerard.
Below is a simplified scenario:
B&W and RGB ramps are averaged(added.. etc) together.
I can sample directly from 'a' and 'b'
I can not sample the colours of the combined ramp (c) (just gives some
bogus colour regardless of the UV space)
if I pass the outColor of a single ramp into another ramp (eg 'b'>'d') this
can be sampled
if I pass the outColor of 'c' into 'd' sampling of 'd' fails...
I am using 2 ways to sample within an expression:
//
setAttr ("place2dTexture4.uCoord") 1.0;
setAttr ("place2dTexture4.vCoord") .2;
getAttr ("combinedColourRamp.color")
and I have tried the colorAtPoint command (which I think does the exact
same thing...)
colorAtPoint -o RGB -u 1.0 -v 0.2 combinedColoursRamp
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