Cloth simulation and Geometry nodes

[Manolo76]

Hello,

The instances generated by Geometry Nodes have strange behaviour with cloth simulation on it and wind. I’m a beginner with Geometry Nodes and I don’t understand why ?

I would like that the planes generated go along the Y axis.

test.blend (1.2 MB)

[Manolo76]

Anyone for un hint please ?

[oo_1942 (Kim)]

I don’t know much about geometry nodes, but…
Please refer to the attached link

Simple Infection Setup with New Sim Geometry Nodes

Simple set up using new simulation nodes of GN. Might be useful for a lot of things like growing stuff, particles vs. Haven’t tried but I guess you can feed it to cloth, smoke sims etc. [infection] [particle]

[Tut] Burning Paper with Particles - Blender Geometry Nodes 3.0 Field; Nodevember 2021

geometry node + Softbody simulation

[Tut] Softbody/Cloth Simulation on Complex Geometries in Blender 4.0

[eelh (Kate White)]

One of the problems is that you are instantiating plane that has its geometry changed on each frame (it is falling due to gravity applied to Cloth simulation, but its origin remains unchanged). This causes plane instances to move.
The other problem is that on each frame you generate new plane instances, the ones generated on previous frames no longer exist. This causes flickering.

EDIT:
By using simulation zone you can preserve all plane instances. But looks like Cloth modifier does not work when geometry changes. So I’m just moving instancing along Y here.
test2.blend (1.2 MB)

[Manolo76]

Thanks both of you. I’m gonna looking at videos and thanks eelh for explanations. I understand better now why it failed.