Constraint Tag

Using this tag you can define how the rigid body should be constrained. Note that you should place the rigid body in a position within the constraints, otherwise the rigid body may take several animation frames to reach the required position. The settings displayed in the Attribute manager for the Constraint tag will vary depending on which type of constraint you’ve specified using the Type parameter. You can set Type to Joint, Velocity or Motor.

You can use multiple Constraint tags per rigid body. For example, to define a Motor constraint and a Velocity constraint for the same rigid body, use two Constraint tags — one for the Motor constraint and the other for the Velocity constraint.