This entry was posted
on Thursday, April 21st, 2016 at 6:02 am and is filed under Physics.
You can follow any responses to this entry through the RSS 2.0 feed.
Both comments and pings are currently closed.
Nice that you’re trying these test scenarios and posting the demos!
One thing I noticed a while ago (and reported) was that if you set up a “simple” pendulum - i.e. small body with a world constraint position relatively far from its CoM - then angular damping on that joint doesn’t really work - it’s always far too weak. Fancy checking that one?!
I cannot reproduce this. Angular damping seems to work just fine, although it’s hard to say what “too weak” means in this context - angular damping is a value defined by users, as you probably know. Also I’m not sure how you setup your pendulum - what kind of joint, etc? I don’t see an issue in my simple tests but I can have another look if you give me more details
Just emailed you with details. Checking again - the problem was with a pendulum where the ratio of the blob size to the pendulum length is small (anything below 1 really, and 1:10 results in practically no damping at all). Created using a 6DOF joint, spring = 0.
We saw this a long time ago (2013!) so perhaps it has been fixed already - not really set up to test it just at the moment…
April 22nd, 2016 at 8:53 am
Nice that you’re trying these test scenarios and posting the demos!
One thing I noticed a while ago (and reported) was that if you set up a “simple” pendulum - i.e. small body with a world constraint position relatively far from its CoM - then angular damping on that joint doesn’t really work - it’s always far too weak. Fancy checking that one?!
April 26th, 2016 at 5:09 am
Hi Danny,
I cannot reproduce this. Angular damping seems to work just fine, although it’s hard to say what “too weak” means in this context - angular damping is a value defined by users, as you probably know. Also I’m not sure how you setup your pendulum - what kind of joint, etc? I don’t see an issue in my simple tests but I can have another look if you give me more details
May 4th, 2016 at 3:46 am
Just emailed you with details. Checking again - the problem was with a pendulum where the ratio of the blob size to the pendulum length is small (anything below 1 really, and 1:10 results in practically no damping at all). Created using a 6DOF joint, spring = 0.
We saw this a long time ago (2013!) so perhaps it has been fixed already - not really set up to test it just at the moment…