[Solved] How to turn but not move while channeling?

[KitsuneTailsPrower]

A the title says, what is the best way to make a spell that allows the hero to turn while channeling it but not move. Bonus points if it doesn't lock the unit's XY coordinate and interfere with Knockback. For an example of what I mean: Icarus's ability in Dota where he shoots a beam of fire.

 

[Elprede]

Set the unit's prop window to 0 radians to allow the unit to turn but not move.
- SetUnitPropWindow(unit, 0)

To reset the prop window:
- SetUnitPropWindow(unit, GetUnitDefaultPropWindow(unit)*bj_DEGTORAD)