How do I return a list of names and ids for a drop down menu?

lionlion44

I'm trying to automatically set a parameter on a shader. The parameter is a dropdown menu (combo box). The items in the drop down are dynamic so I can't just use a static number to set the parameter.

I'm wondering if there's a way to read the names of the items and select the one I want based on the name?

Something like:

items = getComboBoxItems(c4d.SUBSTANCESHADER_CHANNEL)
for item in items:
    if "roughness" in item.name:
        SubstanceShader[c4d.SUBSTANCESHADER_CHANNEL] = item.id

lionlion44

found a solution:

substance_shader = diffuse_shader.GetClone()
mat.InsertShader(substance_shader)
mat[c4d.OCT_MATERIAL_ROUGHNESS_LINK] = substance_shader

desc = substance_shader.GetDescription(c4d.DESCFLAGS_DESC_NONE)
parm_desc = desc.GetParameter(c4d.SUBSTANCESHADER_CHANNEL)
cycle = parm_desc[c4d.DESC_CYCLE]
for index, value  in cycle:
    if "roughness" in value.lower():
        substance_shader[c4d.SUBSTANCESHADER_CHANNEL] = index
        break

ferdinand

Hey @lionlion44,

yes, that is the correct answer. The subject comes up from time to time, here is an answer of mine which is about the very case of yours - discovering substance channels.

Cheers,
Ferdinand