Adding a color field in the addon Panel

Question

I wanted to add a color field to my Blender addon panel, with which I can adjust the color input of a Principled Volume node. But i´m struggling, how I can insert such a color field there and synchronize it with the color field of the Principled Volume. Does anybody know how to do that? I would appreciate every help!

Answer 1

check this out:

import bpy
def hndl_draw(self, context):
    row = self.layout.row()
row.prop(context.object.data, "myColor")


def get_color(self):
    return bpy.data.materials["Material.001"].node_tree.nodes["Principled Volume"].inputs[0].default_value
def set_color(self, value):
    bpy.data.materials["Material.001"].node_tree.nodes["Principled Volume"].inputs[0].default_value = value
    return
def register():

    bpy.types.Armature.myColor = bpy.props.FloatVectorProperty(
                                     get=get_color,
                                     set=set_color,
                                     name = "myColor",
                                     subtype = "COLOR",
                                     size = 4,
                                     min = 0.0,
                                     max = 1.0,
                                     default = (0.75,0.0,0.8,1.0)
                                     )
bpy.types.DATA_PT_display.append(hndl_draw)


def unregister():
    bpy.types.DATA_PT_display.remove(hndl_draw)
    del bpy.types.Armature.myColor
if name == "main":
    register()

Note1: i used the solution from here: Color as Custom Property?

Note2: i changed it a bit

Note3: you need a material called "Material.001" with a principled volume in it with exact the name i used, and an armature

result:

hope that helps.