Spring RTS Engine

Spring.GetProjectileDirection doesn't seem to exist (using Spring 96)

http://springrts.com/wiki/Lua_SyncedRead says:
Spring.GetProjectileDirection New in version 95.0
( number projectileID ) -> nil | number dir.x, number dir.y, number dir.z

however using it yields:
"attempt to call field 'GetProjectileDirection' (a nil value)"

Are you calling it from a widget or a unsynced/synced gadget?

Synced Gadget

Edit: I found taking Spring.GetProjectileVelocity(proID) and normalizing the result works just fine.