An onEmit callback that returns a value between the Phaser.GameObjects.Particles.EmitterOp#start and
Phaser.GameObjects.Particles.EmitterOp#end range.
| name | type | description |
|---|---|---|
| particle | Phaser.GameObjects.Particles.Particle |
The particle. |
| key | string |
The key of the property. |
The new value of the property.