(21-04-2021, 02:40 PM)gabrimo Wrote: So after configure a basic cloth and add some particle attachments my net is ready. But I'm facing two problems now.

Firstly, the net is too bouncy. After re-read some of the documentation, I find that part where it says that increasing substebs and constraints iterations should help with that, but after a few attempts the situation still happening.

(21-04-2021, 02:40 PM)gabrimo Wrote: The other issue I'm facing is regarding the collision, on powerful shots, the collision is registered (at least partially), but the ball passes through the net.

(21-04-2021, 02:40 PM)gabrimo Wrote: I tried to play around with substeps too and manage to solve that problem adding around 10 subteps, but with this value, sometimes the scene runs normally, sometimes seems that my PC is struggling, which indicates performance problems.

(21-04-2021, 02:40 PM)gabrimo Wrote: My net has around 500 faces, totalizing 591 particles, not sure if I should lower this to improve performance and collision detection.

(21-04-2021, 03:07 PM)josemendez Wrote: 3-4 substeps should remove any stretching from most cloth. Can you share a video of this issue?

Quote:What's the mass of the ball, and the mass of each particle in the net? Large mass ratios can make it difficult for the cloth to stop a fast, comparatively heavy rigidbody (as it has a lot of momentum), even if collisions are properly detected.

(21-04-2021, 03:45 PM)gabrimo Wrote: Ball's rigidbody has 0.43 of mass. I don't know where to check the particle's mass though, they must be with the standard value, if there's a standard value for this anyway. Here's another video showing the problem, this time I decreased substeps to 4:

https://imgur.com/a/znEg7xC

(22-04-2021, 07:36 AM)josemendez Wrote: Hi,

I mixed up the meanings of bounciness and stretchiness in your previous post: increasing the amount of substeps will make the cloth less stretchy (less saggy, more tense) but will actually make it more bouncy, because it preserves energy more efficiently. This makes the cloth behave more like a trampoline, and the ball will bounce back from it.

You probably want to increase the max bending parameter in the bending constraints, and also increase max compression in the distance constraints (both parameters can be found in the ObiCloth component). The first will have the effect of allowing the net to bend more easily (so that it is less like steel wire and more like cotton), and the second will allow some compression of the fibers (since nets compress and crumple very easily, unlike tight-woven fabric). See:
http://obi.virtualmethodstudio.com/tutorials/bendingconstraints.html
http://obi.virtualmethodstudio.com/tutorials/distanceconstraints.html



You can change the mass on a per-particle basis in the blueprint editor. You have a dropdown menu that lets you choose which particle property you're editing: (mass, radius, phase or color). You can either select particles and set their value directly, or you can use the paint tool to paint values on the surface of the mesh.

I believe the default is 0.1 per particle, which is too little in this case. I'd try using 0.2-0.3. The higher the mass of the cloth, the easier it will be for it to stop a fast moving, heavier ball.