Link between OmniGraph emitter and PhysxParticleSystem

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1

Hello,

I really like the fluid PhysxParticleSystem, and I was able to get it to work as intended with the particle sampler as suggested here (Particle Simulation — Omniverse Extensions latest documentation).

My question is, can I get similar particle physics effects when I generate the particles using a point instancer particle system as shown here? (Tutorial 2: Create a point instancer particle system with a collider — Omniverse Extensions latest documentation)

I was able to get particle collisions with the emitter, but I was not able to get the particles to apply forces to objects they collide with.

2

Let me ask someone who is an expert in Particles and get back to you.

3

Hello, I just wanted to make sure this didn’t get lost in the weeds. Are there any updates on the particle emitter physics?

4

The physx particles and graph-based particles are different systems, and the graph-based particles are only one-way coupled to scene geometry. So the particles can collide with scene geometry but no, they can’t exert forces to push the scene geometry around. So I would stick to method 1, the PhysxParticleSystem.

5

Thank you for the clarification.
Is there a way to generate particles with user-defined velocities during the simulation?
Particle sampling only generates static particles before the simulation.

I am thinking of something like 1:39 from this PhysX video https://www.youtube.com/watch?v=1o0Nuq71gI4

6

Let me find out and get back to you.

7

Hello, any updates on this topic?

8

The particles system is not currently being developed further

9

I think I may need to clarify that I was talking about using PhysXParticleSystem, not the graph-based particles. Is there no way to reproduce the behavior in the video that I referenced (1:39) using the PhysXParticleSystem, e.g. by generating particles with user-defined positions/velocities during the simulation?

I see that it may be possible based on this documentation Particle System — physx 5.1.0 documentation : “Once a particle buffer is created, it can be initialized with initial positions, velocities and phases for simulation”