Inch-worm

Rick Giuly <[email protected]>
Newsgroups gmane.comp.breve
Message-ID <[email protected]>
short form:
Is there any way to restrict a revolute joint to turn freely in only one 
direction?

long form:
I'm trying to make a wheeled inch-worm. The idea is to have several body 
joints, each with a wheel on either side. The wheels need to turn freely in one 
direction but not turn in the other direction. Then as the worm body joints 
oscillate, it tends to go in one direction. I could attach a wheel with a 
revolute joint and it would turn freely either way. Is there any way to 
restrict it to one direction?

-Rick


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