# Emitter module
# Overview
Emitter (emitter module) is used to set the properties related to particle emission, such as the emission interval time, the duration of the particle system, whether the emission is cyclic, etc.
# Property description
| Property | Function | Type |
|---|---|---|
| duration | The duration of the particle system's operation. | number |
| looping | If checked, it means that the particle system will continue to run from the beginning after the particle system has finished running. | boolean |
| playOnAwake | If checked, it means that the particle system will be executed immediately after loading. | boolean |
| maxParticles | The maximum number of particles during a run of the particle system. If the maximum number is exceeded, new particles will not be emitted. | number |
| rateOverTime | The number of particles emitted per second. | engine.Particle.AdvancedProperty.ConstantProperty engine.Particle.AdvancedProperty.TwoConstantsProperty engine.Particle.AdvancedProperty.CurveProperty engine.Particle.AdvancedProperty.TwoCurvesProperty |
| startDelay | The time (in seconds) to delay the emission of particles after the particle system starts running. | engine.Particle.AdvancedProperty.ConstantProperty engine.Particle.AdvancedProperty.TwoConstantsProperty engine.Particle.AdvancedProperty.CurveProperty engine.Particle.AdvancedProperty.TwoCurvesProperty |
| bursts | A certain number of particles are emitted at a certain point in time. | engine.Particle.ParticleEmitter.ParticleEmitterBurst[] |
| - time | The time of trigger. | number |
| - count | The number of shots. | engine.Particle.AdvancedProperty.ConstantProperty |
| - cycles | The number of triggers. | number |
| - interval | The time interval of each trigger, must be greater than 0. | number |
| - probability | The probability of triggering. | number |