ParticleSystem.Particle.startLifetime

Description

Начальное значение времени жизни частицы.

This is the total lifetime of this particle in seconds. It is set by the Particle System when creating the particle.

using UnityEngine;

public class Example : MonoBehaviour
{
    void Start()
    {
        ParticleSystem.Particle particle = new ParticleSystem.Particle();

        // Calculate how long the particle has been alive.
        float timeAlive = particle.startLifetime - particle.lifetime;
    }
}