public PrismaticJointDef()
{
Type = JointType.PrismaticJoint;
LocalAnchor1.SetZero();
LocalAnchor2.SetZero();
LocalAxis1.Set(1.0f, 0.0f);
ReferenceAngle = 0.0f;
EnableLimit = false;
LowerTranslation = 0.0f;
UpperTranslation = 0.0f;
EnableMotor = false;
MaxMotorForce = 0.0f;
MotorSpeed = 0.0f;
}