ApplyForce(Vector2 force, Vector2 point) Issues (FPE 3.0)

Feb 20, 2010 at 10:16 AM

Fist just a note: I posted this to the Box2d.XNA forum as well as they seem to have a similar issue. Behavior is slightly different though.  (

If you open and run the "ApplyForce" test.  It seems like a torque is being applied to the ship when it shouldn't be.   Just run the test and press 'W'. For me, the ship begins rotating 

I looked at it for a little bit, but was unable to see what the cause was.


Feb 20, 2010 at 1:53 PM

It seems like the COM (Center Of Mass) is not in the middle of the ship, but rather a little to the left. I will take a look at the issue.

Feb 21, 2010 at 2:50 AM
Edited Feb 21, 2010 at 2:51 AM

The guys over on the Box2D XNA project just pointed out that the density of the shapes that make up the ship is different.  One side therefore is heavier than the other. Looks like the same thing in Farseer. Probably should make those the same so as not to confuse anyone.... like me. :-)

Feb 21, 2010 at 1:04 PM

arh, never got around to take a good look at it. Thanks, I will change it to be the same to not confuse anyone.