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# assumes the values of the first indices add up to 100. | |
import bpy | |
import random | |
mats = bpy.data.materials | |
nodes = mats['Material'].node_tree.nodes | |
elements = nodes['ColorRamp'].color_ramp.elements | |
RAN = random.random | |
get_random_color = lambda: (RAN(), RAN(), RAN(), 1.0) | |
procents_and_colors = [ | |
[20, get_random_color()], # or fill these with prechosen colours | |
[30, get_random_color()], | |
[50, get_random_color()], | |
] | |
# this sections adds or removes elements if you update your | |
# procents_and_colors list with more / fewer elements | |
diff = len(elements) - len(procents_and_colors) | |
if diff > 0: | |
for i in range(abs(diff)): | |
elements.remove(elements[-1]) | |
elif diff < 0: | |
for i in range(abs(diff)): | |
elements.new(position=0.0) | |
position = 0 | |
for idx, section in enumerate(procents_and_colors): | |
elements[idx].color = section[1] | |
elements[idx].position = position | |
position += (section[0] / 100.0) |
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