I simply want to make a pinned cloth catch a falling rigid body so as to slow its fall until it comes to a halt.

At the moment, the ball falls and the cloth interacts with it, but the ball will pass straight through the cloth without slowing it (even though the cloth reacts to the ball).

What setting do I need to apply to make this work, please?

  • $\begingroup$ I just added another (last) edit, to update the result of my efforts on this matter, even if I failed... $\endgroup$ – m.ardito Feb 21 '17 at 11:10

Here is an example, based on what you said, if I got it right:

  1. subdivide a bit a cube, rise it on Z, set rigid body "active", a bit of bounciness, "mesh" collision shape
  2. set a ground plane, set a group with the 4 corner vertices, set plane to cloth, with pin to the above 4 vertices group, set also rigid body "passive", with a bit of bounciness, set collision shape to "mesh"

it should behave like this:

enter image description here

here is the example file



As for comments, I noticed you asked something slightly more natural. Rigid bodies made the cloth stop the falling cube, but it seemed as their interaction was poor.

Although you didn't post any image, animation or example file, I hope now to understand what you wish, and have done another setup, but it does not use rigid bodies, it uses soft bodies:

Here is the result:

enter image description here

I've done it like this:

Plane has

  1. cloth enabled, pinned to the 4 corner vertices group
  2. collision enabled (default settings)
  3. soft body enabled with "default goal strength" .98

Falling cube has also soft body enabled, with

  • soft body goal > disabled
  • soft body edges > stiff quads, shear 1
  • soft body edges > springs pull 0.99

And, here is another example file

edit 2:

since in comments you (finally!) unveiled your ultimate desire:

"I specifically wanted to achieve the effect of a (soccer) football being caught by a goal net."

I tried similar setups and... found that's is really hard, imho. I had some partial (weird) results using mostly softbodies instead of cloth, and you see them below, but although I'm not satisfied (all of them are really acting weirdly) I show them here below for completeness's sake. To partially justify my failures, I found this on this manual page: Deflection for softbody objects is difficult, they often penetrate the colliding objects.

Below you see I used a "force" simulation (with a abrief strong impulse behind the ball) to "kick" the ball into the net, this also could help or inspire you. Last, I would create a new question more specific, like "how can I realistically simulate a soccer ball caught in a goal net?"...

So, here are some results I got until now: I can post also .blend files if you need to experiment: it was fun, in the end, but I wish I found a very good end compelte solution...

enter image description here

enter image description here

enter image description here

  • 2
    $\begingroup$ Quoting OP: "so as to slow its fall until it comes to a halt" With the technique you are showing here, the cube's impact on the "cloth" is not affecting the cloth at all. It's as if the cloth has turned to stone an instant before the impact. The cube bounces, but does not slow as if caught by a net or cloth, which is what OP seems to be seeking. $\endgroup$ – Mentalist Feb 17 '17 at 2:18
  • $\begingroup$ @Mentalist thanks, true. I just added another way (although it needs soft bodies, not rigid bodies), I hope this fits better. $\endgroup$ – m.ardito Feb 17 '17 at 8:43
  • $\begingroup$ Updated answer looking good! $\endgroup$ – Mentalist Feb 17 '17 at 10:08
  • $\begingroup$ Thank you for taking the time to post an answer. I specifically wanted to achieve the effect of a (soccer) football being caught by a goal net. The net would be cloth and the ball would be a rigid body travelling at speed. Your edit to the original post almost answers the question, but I can't see a way of achieving a fully simulated result without having to manually animate the ball. $\endgroup$ – Ben Hayward Feb 17 '17 at 16:28
  • $\begingroup$ ah ok, but a soccer ball doesn't really "fall" into a net... it "travels" more or less horizontally and then collides with the net which slows the ball until it falls down on the ground... I'll think of something, and if it works, I'll update the answer. But if you have some setup, even not working, an image of it could help to replicate it as closely as possible... but if you don't wish to animate the ball, how is the ball going to score a goal in that net? $\endgroup$ – m.ardito Feb 17 '17 at 17:13

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