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I am attempting to create a dragon curve in Blender Geo nodes via duplicating and rotating a mesh line repeatedly, similar to this gif I found on wikipedia (without the beveling): https://en.wikipedia.org/wiki/Dragon_curve#/media/File:Dragon_Curve_unfolding_zoom_numbered.gif

The Main Issue

I cannot find an easy way to locate the 'end' point in the mesh line, as shown in the gif. I've tried many different solutions, but all of them have failed. I check stack exchange multiple times and could not find a solution. I have hit a brick wall in terms of my very limited toolkit as I am quite new to Geo Nodes, and am still getting my footing. Feel free to ask further questions for more clarity on my part. Here are a few images showcasing my admittedly small problem.

Current Node Setup. Things in the frame will be grouped and copy-pasted for the desired result

enter image description here Thank you.

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  • $\begingroup$ Hey, I know that there's already an answer, but just to let you know, Default Cube has uploaded a tutorial on this. youtu.be/gigIzivJkxk $\endgroup$
    – The Kalaakaar
    Commented Jul 30, 2023 at 16:59

2 Answers 2

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Example for independent study:

The generation method is to remember the start and end points, and overwrite them correctly for the next iteration.

enter image description here

enter image description here

enter image description here

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A simple and performant way to detect if a vertex is the "end" is to simply check the number of edges connected to it:

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  • $\begingroup$ But how would I find the position of those points? $\endgroup$
    – Dreadward07
    Commented Jul 29, 2023 at 21:12
  • $\begingroup$ @Dreadward07 to find the position of them is an XY Problem, you need to explain what is your end goal, because the most immediate answer to your question is simply: use the "Position" node. $\endgroup$
    – Markus von Broady
    Commented Jul 29, 2023 at 21:18
  • $\begingroup$ Apologies, I should have made it clearer in my original question that I needed to return a vector for the end points. $\endgroup$
    – Dreadward07
    Commented Jul 29, 2023 at 21:34

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