3DS Max Mass FX Physics Help (Newb)

Dan Powell

Hi Polycount,

Not used Mass FX before so thought I'd give it a try to save me time having to place all of these hockey sticks manually in a small bin.

When I simulate the physics I'm getting this sort of result:





Most of them simulate correctly but a few rogues just go completely wrong.

The bin is a Static Rigid Body with everything set to default, other than its Shape type (collision boundaries) which set to Original.

There are four variations of Hockey sticks being dropped into it. There are three of each variation, for a total of 12 hockey sticks. They are instanced, and set to Dynamic Rigid Bodies with default values except for their Shape type, which is Concave.

I've tried turning on High Velocity Collisions, and bumping the Substeps up to about 60 - but that hasn't helped.

Any guidance apprenticed.

Dan Powell

They don't fall through the barrel if I use Convex collision either, however the result is less accurate due to the collision bounds (shown below)

Eric Chadwick

The 2nd result looks good to me. What's wrong with it?

Dan Powell

Eric Chadwick wrote: »

The 2nd result looks good to me. What's wrong with it?

It's reasonable, though I'm more curious as to why using "Concave" as the setting for each of them didn't work. Convex creates a collision vector which doesn't line up brilliantly with the sticks due to them curving at the end.

monster

Dynamic Rigid Bodies cannot be concave. But you can use multiple convex meshes. You can press the generate button in the Physical Mesh Parameters rollout to generate a series of convex meshes that will fit your objects.

See the Summary at the bottom of this page:
http://knowledge.autodesk.com/support/3ds-max/getting-started/caas/CloudHelp/cloudhelp/2015/ENU/3DSMax-Tutorial/files/GUID-60A7521E-B5FD-4165-9A0E-EAAD7FBB5D71-htm.html