Using "Set Parameter" ROP in HtoA

[fxnut]

Hi,

I'm trying to set the Kd_color attribute of an Alembic packed primitive by using the Set Parameter ROP.

Based on a reply I had here, I've set the following parameters:

Selection Parameter:

*.(@node == 'polymesh')

Assignment_1 Parameter:

Kd_color = [1 0 0]

I've assigned a standard material to a cube and saved it out as Alembic. I then bring it back in to be rendered as a packed primitive. To debug, I took a look at the Ass file:

set_parameter
{
 name /out/set_parameter1
 enable on
 selection "*.(@node == 'polymesh')"
 assignment "Kd_color = [1 0 0]"
}

So the Set Parameter ROP seems to be doing what it should, but the rendered cube remains white, not red. Any thoughts as to what I'm doing wrong?

Thanks,

Andy

[Stephen.Blair]

Kd_color is a shader parameter (of the old deprecated Standard shader), not a polymesh parameter

[julian.hodgson · Accepted solution]

Right - you should be able to change the shader's parameters with an operator if you select the shader.

But you also can create a colour parameter on the shape with an operator, and then tell the shader to look for the new parameter:

and then pick that up in the shader:

and you should see a red sphere if you connect the operator:

See the example file set-parameter-cd.zip

Cheers,

Julian

[fxnut]

Thanks Julian, I'll give that a go!

@stephenblair Okay, yep that makes sense. I think I was looking at the wrong thing in the ass file. Thanks.