I recently switched from isaac 3.23.1.1 to 4.2.0 for ros2 configuration of rtx lidar. Switching made me realise that there are drastic changes in the particle system. Any idea or tips how could I replicate this particle system given in the tutorial on isaac 4.2.0 (“Tutorial 2: Create a point instancer particle system with a collider — Omniverse Extensions”)
Hi @ysakhale, thank you for your question. Could you provide us with more information about what you are trying to migrate? Were you able to follow the tutorial?
I attempted to import the fx_sphere_collision.usda file related to the particle system from the asset package in version 4.5, but it resulted in an error.
2025-03-12 03:13:55 [63,362ms] [Warning] [omni.graph.core._impl.update_file_format] Prims of type ComputeGraphSettings no longer function. /World/particle_system/computegraphSettings has been disabled and should be deleted.
2025-03-12 03:13:55 [63,364ms] [Warning] [omni.graph.core._impl.update_file_format] Scene has migrated to use OmniGraph Schema - please save and reload. These changes were made:
{'Prim Nodes Removed': [], 'Prim Types Changed': [('/World/particle_system', 'ComputeGraph', 'OmniGraph'), ('/World/particle_system/solver', 'ComputeNode', 'OmniGraphNode'), ('/World/particle_system/emitter', 'ComputeNode', 'OmniGraphNode'), ('/World/particle_system/output', 'ComputeNode', 'OmniGraphNode'), ('/World/particle_system/direction_force_field', 'ComputeNode', 'OmniGraphNode'), ('/World/particle_system/particle_system_flow_emitter', 'ComputeNode', 'OmniGraphNode')], 'Root Prims Moved To Graph': [], 'Settings Removed': ['/World/particle_system/computegraphSettings']}
2025-03-12 03:13:55 [63,368ms] [Warning] [omni.graph.core.plugin] Could not find node type interface for 'omni.particle.system.core.Visualizer'
2025-03-12 03:13:55 [63,368ms] [Warning] [omni.graph.core.plugin] Could not find node type interface for 'omni.particle.system.core.FlowEmitter'
2025-03-12 03:13:55 [63,368ms] [Warning] [omni.graph.core.plugin] Could not find node type interface for 'omni.particle.system.core.Solver'
2025-03-12 03:13:55 [63,368ms] [Warning] [omni.graph.core.plugin] Could not find node type interface for 'omni.particle.system.core.DirectionField'
2025-03-12 03:13:55 [63,369ms] [Warning] [omni.graph.core.plugin] Could not find node type interface for 'omni.particle.system.core.Emitter'
I noticed that version 4.5 allows the creation of particle systems, and the physics demo example provides access to the source code. However, the tutorial at
is very brief, and I don’t know how to use it.
hi @michalin I was trying to create a point instancer attached to a sphere similar to the way i did back in version 4.2.0 but I cant figure out a way to do this in 4.5. I even tried to replicate the nodes given in the action graph below in 4.5 but realised the input variables are different in 4.5.
Hi @ysakhale,
Sorry for the delay on this issue. Are you still having trouble with Point Instancer? A good reference to use is the example provided in Isaac Sim 4.5.0 located in Physics Demo Scenes : Instanced box on a table. You open it through Window>Examples>Physics Examples
You can also open the source code to see how you can use Point Instancer.
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