Mash Dynamics - Wrong calculations?

[Anonymous]

Hi!

I have a small problem with Mash Dynamics system.I get weird results every time I try to simulate more complex shapes. Simple cubes and spheres simulate fine.

Here an example:

And here is raw bullet simulation:

any idea what is happenig?

Thanks

Dawid

[mspeer]

Hi!

Make sure to use the same collision shape for comparison (you can display the collision shape in Viewport).

Try "Hull" in MASH.

For further help please upload a scene-file.

[Anonymous]

I did try with every setting possible and results are the same or worse. I attached maya file.

[mspeer · Accepted solution]

Hi!

The pivots of your objects are offset and not at local center.

Select original objects and use Modify -> Bake Pivot.

[Anonymous]

Thank you, it works. Is there any way to remove the "poping" from the simulation when using "Mesh" instead of Convex Hull? 

Thanks

Dawid

[mspeer]

Hi!

I don't think so.

Bullet is made for "fast" calculations of many objects and not physical correct simulations of a few complex objects like yours.

There is a reason why the option "mesh" is only available for static objects for the Bullet plug-in.

This may change in near future (or maybe is a bug), but as i said i don't think so.

For a "better" (more correct) simulation you might choose an other simulation type/setup.

[bingeDBHKM]

I had a similar problem and this solution worked. I appreciate it.