BEPUphysics

i look for alternatives to Generic6DofConstraint class of bullet physics engine .
which class have lower/upper (angular and linear) limit in BEPU physics?

A list of the available constraints and their visualizations can be found here:
http://bepuphysics.codeplex.com/wikipag ... umentation

Constraints like RevoluteLimit and LinearAxisLimit can be used together to constrain multiple axes. However, it usually works out better if the constraint uses the most applicable full joint for the job. For example, a shoulder joint would likely be composed of a BallSocketJoint, TwistLimit, and a EllipseSwingLimit.

Examples of constraints can be found in the BEPUphysicsDemos source (in the main source download) and in the RagdollDemo linked in the above Joints and Constraints documentation.

Sorry about this late reply.
Thank you, Norbo.
BEPU physics is Amazing!