Forums Houdini Indie and Apprentice (rand($PT))*"integer" + avoiding duplicate value?

(rand($PT))*"integer" + avoiding duplicate value?

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Adriano
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I'm trying to create random integer values to select random object from a switch node and copy those with a copy stamp onto points. But i'd like to avoid duplicate values. Anyone please?

I'd be fine with a successive incremented value as well in my case scenario assuming i can define the min / max range. No clue either how to write that.

Thanks,

A.
Edited by Adriano - Aug. 11, 2017 13:36:48
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Enivob
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With a small set of items it is not going to make that much difference. But you can leverage Python's random.sample() to randomly pull from a list of candidates. If your geometry point count ever exceeds the list length then you will experience a duplicate.
import random

geo = hou.pwd().geometry()

# Create the point attribute value, giving it a default value and store the returned hou.Attrib object.
rnd_index = geo.addAttrib(hou.attribType.Point, "rnd_index", 0)

sample_set = [0,1,2,3,4,5,6]
for point in geo.points():
    value = random.sample(sample_set, 1)
    point.setAttribValue(rnd_index, value)
Edited by Enivob - Aug. 12, 2017 08:53:21

Attachments:
rnd_non_repeating_sequence.hiplc (70.2 KB)

Using Houdini Indie 20.5
Windows 11 64GB Ryzen 16 core.
nVidia 3060RTX 12BG RAM.
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