So I have a 2D wireframe (no faces) on the left and I would like to achieve the result on the right with geometry nodes. Any ideas on how to do this?
I lost a couple of hours to try to solve this puzzle with no success.
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$\begingroup$ It's actually a hard problem to solve I think. You can start exploring the convex hull node. $\endgroup$– GorgiousFeb 8 at 14:23
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$\begingroup$ Sure, that seems to be one of the ways to go. but how would you do it if you did know from which edge you'd start? I know how to get the shortest path but not how to get the longest one. This was reffering to the comment you deleted $\endgroup$– Vic MarcoFeb 8 at 14:25
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$\begingroup$ Convex hull doesn't seem to help at all since some of the edge vertices disappear inside it $\endgroup$– Vic MarcoFeb 8 at 14:27
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$\begingroup$ Yeah I deleted the comment because I realized it was wrong. :) Convex hull doesn't cut it I know, but it's a step forward. You can also explore this method youtube.com/watch?v=mnSg5iOS4QU with the new, experimental simulation nodes $\endgroup$– GorgiousFeb 8 at 14:30
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$\begingroup$ I thougt about turning this wireframe into mesh of faces, but still have no idea how to achive it. I would know how to fill multiple closed mesh loops but I dont know how to separate these rectangles that create this wireframe mesh from one another. Any suggestions in this direction? $\endgroup$– Vic MarcoFeb 8 at 14:30
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1 Answer
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If your mesh also has faces, you can solve this by checking the number of faces connected to the edges, and feeding only this selection into the node Delete Geometry:
...But since your mesh has no faces, this is not a solution for you (but maybe for others).
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$\begingroup$ Well, it doesn't have faces, that's the problem and that's why I specified that it's 2D wireframe and not mesh faces. I appreciate you trying to help, though, thanks $\endgroup$ Feb 8 at 13:35
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$\begingroup$ @VicMarco And that's why you're awarding a downvote? ...it would have been great if you explained that in your question... $\endgroup$– quellenform ♦Feb 8 at 13:36
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$\begingroup$ Sorry I didn't mean to downwote as an offense to you, Do you get some negative consequensces if your post gets downvoted? I'll remove the downvote if that's the case. I just thought it was not useful to the solution of the probelm. $\endgroup$ Feb 8 at 13:40
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$\begingroup$ @VicMarco If the answer itself is a solution (for a particular way), then a downvote is not adequate feedback. Then, in your place, I would simply not rate the answer at all. A downvote should be used when the answer is fundamentally wrong or misleading. $\endgroup$– quellenform ♦Feb 8 at 13:42
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1$\begingroup$ @VicMarco, you can retract your downvote, I think. Thanks $\endgroup$– lemonFeb 8 at 13:48