How to control RGB color input via python script

Question

As part of a wider script, I'm trying to build a script that will allow me to change the Hex value of an RGB node. I'm struggling though to find where to hook in to the hex value of the input node. Although not ideal, I could make do with changing the RGB value rather than the hex value, but I can't find where to get hold of this value either?

Any help is very much appreciated!

Cheers

Sam

score 4 · Answer 1 · answered Feb 14 '19 at 17:37

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Here is a guide to control cycles nodes with python.

So the code would look like this:

import bpy
mat = bpy.data.materials['Material_Name']
nodes = mat.node_tree.nodes
node = nodes.get("Diffuse BSDF")
# change the color
node.inputs[0].default_value = (0,1,0,1)  # green RGBA

This lets you change the value just one time and does not run in a loop like with animation nodes.

answered Feb 14 '19 at 17:37

Jaroslav Jerryno Novotny

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hex_ = '00ff00' ;tuple(int((hex_+'ff')[i:i+2], 16) for i in (0, 2 ,4,6)) ###or hex_ = '00ff00ff' ;tuple(int((hex_)[i:i+2], 16) for i in (0, 2 ,4,6)) will return a rgba tuple – miceterminator Feb 14 '19 at 18:11
hex_ = 0xff884422; rgba_tuple = tuple((hex_//((256**(3-x)))%256) for x in range(4)) #for numerical hex – miceterminator Feb 14 '19 at 18:58
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Inasmuch as it is item zero recommend using .inputs["Color"] – batFINGER Feb 15 '19 at 07:59

score 1 · Answer 2 · answered Feb 17 '19 at 19:51

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.default_value = (0x80/255, 0x80/255, 0x80/255)

answered Feb 17 '19 at 19:51

JuhaW

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Thanks JuhaW - would you mind clarifying for me what the calculation here is doing? Am i right in thinking this is a method of changing RGB value to decimal value? – pezzatron Feb 22 '19 at 09:37
This is setting rgb values in hex format. – JuhaW Feb 23 '19 at 11:21

score 0 · Answer 3 · edited May 18 '21 at 13:22

0

One way would be to do it with Animation Nodes. I dint do it with hex directly because i think the color-in only accepts rgb, but maybe i'm wrong. In this solution you could write a hex to rgb conversion an output the rgb as in the screenshot.

edited May 18 '21 at 13:22

Chris

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answered Feb 08 '19 at 20:07

A M

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How to control RGB color input via python script

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