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Geometry Nodes have a node for converting meshes in a collection into convex hull instances.

Can that be used with Simulation Nodes to make this happen?

enter image description here

I want to use Simulation Nodes further for what I'm trying to do. Rigid bodies are not an option. Making the parts in a collection to collide would be the first step.

Manu Järvinen
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  • What exactly is your question? How to set up Simulation Nodes to get some kind of rigid body like animation like the one shown in your question? Or just if you can use the Convex Hull node in the Simulation Nodes? Well, it exists in Geometry Nodes, so why it should not be possible to use it? – Gordon Brinkmann Jun 28 '23 at 13:26
  • @GordonBrinkmann The question is the one with a question mark, naturally. Yes, I would love to know how to get some kind of rigid body like animation like the one shown in my question – Manu Järvinen Jun 28 '23 at 14:09
  • Yes, the question mark... but it reads like "can convex hull be used?", the simple answer would be yes. I've seen many tutorials on doing physics simulations in Geometry Nodes, this is quite complex stuff and not a single issue easy to be solved in a single answer here. I guess you would rather need tutorials to achieve this so this is a bit out of scope for this site. – Gordon Brinkmann Jun 28 '23 at 14:34
  • @GordonBrinkmann I've seen some setups with spheres used for getting collided, but not convex hulls yet. I think this is a relevant and small enough question - even though the answer could be quite complex. Hmm. I hope for the best, that somebody could answer it – Manu Järvinen Jun 28 '23 at 14:42
  • Stupid question maybe on my behalf since I haven't seen the setups with spheres you're talking about: can the spheres not be replaced with other objects there? – Gordon Brinkmann Jun 29 '23 at 05:42
  • @GordonBrinkmann I guess that's possible, but then the objects would be rotated in either all possible directions or only one direction for all, that would be my guess – Manu Järvinen Jul 08 '23 at 07:58
  • Is it hard to replace the spheres by other objects? If not, why not simply test how they behave instead of guessing? Usually instances have the same mesh data, but they can be moved, rotated and scaled individually from each other. Like linked duplicates outside of Geometry Nodes, you can do all kinds of transforms differently for each duplicate in Object Mode, only changes in Edit Mode affect the duplicates. – Gordon Brinkmann Jul 10 '23 at 06:35

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