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Masoud

RBD fractured objects issue!

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Posted (edited)

Hello,


In an RBD simulation, I would like to control the transform/rotation of the elements, to stop them from moving forever. The fractures travel too far away..!

I tried to use the "Drag" node, but it's hard to achieve the right value in its parameters!

So what's the best solution to fix it?

 

Actually, I want to achieve a falling behavior like what they made in this TVC:

 

Thanks for helping.

RBD Limiting Drag_02.hip

RBD Limiting Drag.jpg

Edited by Masoud

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Posted (edited)

Try throwing a SOPSolver on the post solve. After the impact frame, scale velocity down.

if(@Frame>18){
    v@v *= 0.1;
}

 

 

rbd_vel_cut.gif

Edited by Atom

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Hi Atom,

Thanks for the reply.
I think it does not look natural. I don't want to reduce the velocity of all parts at a time.

The fractures must continue their motion (Transform/Rotation) at a normal speed (after they collide with the ground). Then each part's velocity has to be decreased in a short time based on their mass...

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Hi Tesan,

Thank you for the reply.
You know, I don't want to modify the Glue constraints and "distance" factor. They just control the power of keeping fractures together and so on...
I would like to limit whatever makes them moving/rotating that much.

RBD Limiting Drag 2.jpg

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Hi Tesan,

The " Interiordetail" is just an SOP (I mean its a post solve operator).

At first, I need to simulate the scene as I explained...

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43 minutes ago, Librarian said:

@Masoud  check this ex from nick regarding sleeping and rest and from sidfx you have some more



https://nicholas-taylor.com/assorted-bullet
https://www.sidefx.com/tutorials/h17-masterclass-rbd-tools-update/

sleepe.gif

Hi there,
I think, forcing the elements to sleep works fine with the sphere shape pieces, but when you have fractured (rock shape) pieces, they would sleep in a bad position.

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Ok,

I tried to limit the piece's movement, by modifying the "spinresist" and "angaccelmax" attributes in DOP, using a POP Wrangle.

The result is not bad, but I will try to make it much better.

I would appreciate any better ideas ...

RBD Limiting Drag_05.hip

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