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Rocket Stuck Lying Sideways on Ground

Topics: Developer Forum
Apr 10, 2012 at 1:30 PM

I have a body(a rocket) that I am using thrust to move forward and torque to rotate.  When the rocket is lying sideways on the ground torquing it does not lift it off of the ground.  Any ideas on what I could do?

Apr 11, 2012 at 5:05 PM

Is it a FixedRotation body? Then torque would have no effect.

Are you applying enough torque?

Replace the rocket fixture with a simple rectangle and apply torque again. Might be a center of mass problem (if your polygon is a weird compound shape).

Try modifying directly the angular velocity to see if something changes.

Apr 12, 2012 at 12:42 AM

It is not fixed.  It rotates when it is not on the ground (i have gravity pulling downward).  It is a rectangle, modifying the angular velocity does not change it.  If I up the torque too much then when its not on the ground it rotates extremely fast.  The centre of mass is the centre of the rectangle.

Apr 29, 2012 at 6:34 PM

I fixed this by applying a small upwards force when you rotate : P

yes its a hack but it works