This is very odd and I can't figure it out.

The model is an explode/breakable object. The base is a lathed cylinder shape with 3 Newton_ groups defining the density. The bottom group is the heaviest and set to a density of 9. The group above it is 6. The long thin part is 1. Above that is the sign board and all the letters.

It is all resting on the ground plane (static object) very close but not touching. The ground is a large grid. I replaced the original 1 patch ground with a grid to see if it made any difference... no difference. A cube (dynamic object) in the chor hits the top of the sign causing it to rock and roll a bit. It usually works fine but every once in a while you can see that the base will penetrate the ground plane causing the "wobble" to increase and continue. I tried everything. I even increased the bounding hull to 16. I checked the bounding hull models and they do match the shape but are not "round". It is made up of flat edges. Could this be what is happening? Some of those "pointy" areas are getting "under" the ground?

Click to view attachment


Any advice or input would be appreciated.

-vern

just a quick thought how dense is the ground plane ,,,if its the default... maybe a denser deflector woulld stop the penetration....not sure this is my first gut reaction

Static objects don't have density... BUT... that got me thinking. There is a chor setting for newton called "Resolution for Static with action". I made the ground "Static with action" and bumped up that resolution setting to 8 and the problem seems to be gone now. Thanks john... you kicked me in the head and got my brain working.

-vern

anytime you need a kick......


thanks for calling the tinkering gnome how can I excellently kick your head to get your brain working





ps I actually meant the ground plane is only 1 patch thinking a more densely patched ground would help but your method works so ....

Tried that and it had no effect. Unlike the "old" version of physics in AM, Newton is very cool with low patch models. Patch count makes no difference. 1 or 100 it's all good.

-vern