Tower Defence Building's Turn

I create a custom building and change its model with a unit model.how can i make my building to turn to specific direction when it attacks?

It will only do that if the field "stats - Is a building" is set to false or if its model has a turret bone like the cannon tower does.

Here's a demo of how to accomplish that.

Or you could use the ancient's root ability (or maybe ancient protectors?).

Aye, that's what the demo shows.

Well I'll be... I didn't know you could do that.

And not many people do, but it's extremely sexy :) Use this knowledge to change the face of War3 mapping forever!

I daresay so.