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I'm working on a node setup for spawning windows on the faces of buildings. Since I only wanted to spawn along faces alligned with the X and Y axis, not curved or angled, I tried to separate the geometry with the "Compare" and "Position" Nodes. This is the setup:

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The problem is, I'm not really sure how the "Compare" node works, and even though I got it to work after messing with different Epsilon values, I don't know what the values actually mean. The setup currently work with mostly rectangular buildings, but I need to input new Epsilon values for different buildings, and it won't work on more complex shapes.

I read the documentation on the Blender website, but it didn't help much. What does the "epsilon" and "value" in the node stand for, and is there a better way to set them up?

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The compare node outputs either 0 or 1. It outputs 1 if the difference of the two input values are less than epsilon. Used to check if two values are equal within a certain tolerance.

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  • $\begingroup$ Ah, I understand. So the node is comparing the X value of the position Vector agaisnt the input Value and the difference agaisnt the Epsilon. So it's only really selecting based on a radius originating from the origin. Not really the solution I needed in the end. Thanks for the reply. $\endgroup$
    – omiyage
    Commented Jan 12, 2022 at 20:03

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