Homeworld Effects Manual: setSpriteRot()
setSpriteRot()(float value)
Legal values: all real numbers
Default value: 0
Sets a sprite's rotation
Obviously, this command is only useful for sprites. value is the rotation of the sprite in radians. This command does not make the sprite spin, setDeltaSpiteRot() does. This command is useful for adding randomization to things like smoke trails and explosions, so the few explosion textures don't look so repetitive.
setSpriteRot(0)
setSpriteRot(3)
setSpriteRot([-1])