Question: How to add a 2D fixed joint

[ManuelZ]

Hi,

How can I add a 2D joint that restricts all three degrees of freedom? Should I use GenericJoint?

[jgerstmayr]

For a RigidBody2D you can:

• use 3 CoordinateConstraint objects to constrain displacement and rotation, OR
• use a GenericJoint and fix 2 displacements and rotation around Z-axis (but leave other axes free), OR
• use a GroundObject, as your body is not moving and it is probably not needed. To prescribe a motion, you can use user functions either in the CoordinateConstraint objects or use GenericJoint with an offsetUserFunction

[ManuelZ]

Great, thanks, I did it with a GenericJoint.