since your dad is threatening and violent then no i would not invite him to your wedding. maybe at some other point in time you can try to rebuild the relationship if you want to. since you haven't had much contact at all for 3 years i don't think your wedding is a good time if your dad is so volatile. if he weren't volatile then i'd say invite him but if there is a chance he is going to ruin your day then i think another time would be better for reconciliation efforts.