attach method

void attach()

Attach the constraint to the bodies.

Implementation

void attach(){
  p1=body1!.position;
  p2=body2!.position;
  lv1=body1!.linearVelocity;
  av1=body1!.angularVelocity;
  lv2=body2!.linearVelocity;
  av2=body2!.angularVelocity;
  i1=body1!.inverseInertia;
  i2=body2!.inverseInertia;
}