Optional Readonlyfollow?: EmitterTargetEmission Point.
An element, "pointer" or a normalized point; change it later with emitter.moveTo().
Readonlyrate: numberEmission Rate.
How many particles leave the emitter per second, spread evenly over time. Must be a positive, finite
number; the instance's maxParticles still caps the total on screen.
Continuous Emitter Options. Everything
fire()accepts (shapes, paper, physics, hooks …) except the settings a stream replaces:particleCountbecomesrate,originbecomesfollow, andemissionis always continuous. A stream cannot form a shape, soformationis not available either.