Vellum Random colors

[davidyannick]

In this example is there a way to affect random color to each balls emitted ?

Thanks

balls_vellum.hiplc

[curv.u]

Hi,

you can use "Vellum Patch Name" attribute in vellumsource node to identify each iteration, then out of the dopnet (after vellumpostprocess) use a color SOP set to Random From Attribute: patchname. Patchname is a point attribute.

Is that the result you wanted?

[davidyannick]

10 hours ago, curv.u said:

Hi,

you can use "Vellum Patch Name" attribute in vellumsource node to identify each iteration, then out of the dopnet (after vellumpostprocess) use a color SOP set to Random From Attribute: patchname. Patchname is a point attribute.

Is that the result you wanted?

thanks but no, Ii'd like each ball to have a different color

[curv.u]

oh yes, of course you should make patchname as unique identifier, so in vellumsource node add $OS_$F for example. The result will be "node_name"_"frame_number" ( = vellumsource_1 if you're on first frame). Check on the Spreadsheet to see the newly created names: your goal should be to have a different name for each frame a ball is emitted, that gives you the dissimilarity useful for the random function.

[curv.u]

Plus, make sure to apply color on points. Patchname is a point attribute, so color must go on points. 

I see you're applying it to detail, if you want to do that you should promote the attribute first. 

[davidyannick]

5 minutes ago, curv.u said:

Plus, make sure to apply color on points. Patchname is a point attribute, so color must go on points. 

I see you're applying it to detail, if you want to do that you should promote the attribute first. 

ok thanks for your help