Stream of Particles

How does one create an attack where a stream of particles comes out of an empty while the left mouse button is held down? I can create the particle system, I just can’t get it to come out of the empty.

fire invisible bullets ( render switched off) with the particles attached as children

You can use the particleEmitter.emit property to switch emission on and off as desired:-

particleEmitter.emit = Input.GetMouseButton(0);

Make sure you have a Particle Animator Component attached with a constant X,Y,Z-force. You can then use Andeeee’s code to turn it on or off. Good luck! =)