Select What You Want in Geometry Nodes - Blender Tutorial
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Published 2023-09-03
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In today's lesson we're going to be diving deep into selections. Learning this well will be transformative to you rprocedural workflows, not just in Geometry Nodes but across all procedural systems.
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Correction: Accumulate Field node's "Total" output does not tell you how many elemtns have been counted, it returns the sum total of whatever values it has counted up. When the Value is 1 as in mine, that means it added 1 per element which is why I worded it that way.
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Contents:
00:00 - Intro
02:12 - What are selections?
03:19 - Booleans
06:16 - Joining Booleans
07:55 - What is an index?
08:45 - Vertex Group Selection
10:14 - How floats are interpolated
11:30 - Float to Integer node
13:16 - Selections with Empties
16:27 - Index-based Selections
19:12 - Selecting a grid row
20:50 - Selecting a grid column
23:06 - Duplicate Index
24:55 - Mesh Island Index
26:10 - Index per point per island
28:11 - Splines
29:05 - Spline Parameter Index
30:47 - Index on Spline Domain
32:50 - Position-based Selections
35:19 - Normal-based Selections
37:15 - Raycasted Selections
40:10 - Curve Attribute Selections
42:20 - Curve Corner Selections
47:08 - Expand Selections
53:35 - Flatten Region Exercise
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All Comments (21)
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@Erindale , another tip 😁: when you were checking to see if any selection were too small you didn’t have to separate the mesh (which is some i try to avoid. [messes up my indices, attributes, extra compute time, etc]). what you could do is the less well known node family called the "face groups to boundary edges" and "boundary edges to face groups". You first use the selection as a face group which you convert to boundary edges and then you convert it back; this gives you an ID per selection island, which you could usr with the accumulate field etc.
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Correction: Accumulate Field node's "Total" output does not tell you how many elemtns have been counted, it returns the sum total of whatever values it has counted up. When the Value is 1 as in mine, that means it added 1 per element which is why I worded it that way.
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This video is pure gold in the form of zeros and ones travelling through the internet!
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I use to think that I'll never get a grasp of Geometry nodes. But after watching this, I'm now certain of it.
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Great video. I will definitely be returning to this for review for my projects in the future.
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32:17 - "Just a little bit of esoteric knowledge..." The very best kind of knowledge there is!
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Selections… the topic i most need for GN! Many thanks.
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one of the best, if not THE best, yet underrated, advanced yet prescinded geometry nodes tutorial. So very useful and valuable info! Thanks erin!!!
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Been waiting for a tutorial on geometry nodes that goes over selections for quite some time now, Thank you!
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Wait this video for a long time! Really thanks
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I could learn so much from you man, this was more than enough to properly introduce fundamentals for geometry nodes! Keep up the great work!
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Many thanks! these kind of videos that compile methods are easy to get back to
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this is great, thank you!
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Thank you so much! This tutorial was extremely helpful. 😺
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Insane tutorial.
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Gonna send people this way for geometry node tips this is super useful reference material thank you :)
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You legend. This is the single best geo nodes tutorial I have seen and I wish I had it years ago.
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Absolute gold video
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This is wonderful! Thank you very much for sharing your knowledge while explaining the thinking behind the choices. I've learnt a lot from you!
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10/10 thank you so much for this! :face-red-heart-shape:
