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Re: [Question #403534]: How to make certain particles "invisibles" to others?

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From: Klaus Thoeni <question403534@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 27 Oct 2016 12:17:35 -0000
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Question #403534 on Yade changed:
https://answers.launchpad.net/yade/+question/403534

    Status: Open => Answered

Klaus Thoeni proposed the following answer:
Not sure if there is a good example. Long story short it is a bit wise
comparison. Here a short example assuming three bodies:

O.bodies[0].mask=1 # 00000001 -> corresponds to 1 in the binary system
O.bodies[1].mask=2 # 00000010 -> corresponds to 2 in the binary system
O.bodies[2].mask=3 # 00000011 -> corresponds to 3 in the binary system

In this example, O.bodies[0] and O.bodies[1] would not interact whereas
O.bodies[2] would interact with both.

HTH
Klaus

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