Thing_Projectile
From ZDoom Wiki
134:Thing_Projectile (id, type, angle, speed, vspeed)
Spawns a projectile. Note that this special requires the actor being spawned to have a SpawnID. To spawn an actor without one, use the SpawnProjectile function instead.
- tid: Thing ID of the map spot to spawn the projectile at
- type: Type of projectile to spawn, from the list of Spawn numbers.
- angle: Byte angle of the projectile
- speed: Horizontal speed of the projectile in units per 8 tics
- vspeed: Vertical speed of the projectile in units per 8 tics (up is positive)