ParticleSystem.lifetimeByEmitterSpeed

描述

Script interface for the Particle System Lifetime By Emitter Speed module.

This module controls the initial lifetime of each particle based on the speed of the emitter when the particle was spawned.

不需要将粒子系统模块重新分配回系统；它们是接口而不是独立的对象。

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    private ParticleSystem ps;
    public bool moduleEnabled = true;
    public float maxSpeed = 5.0f;
    public AnimationCurve curve = AnimationCurve.EaseInOut(0.0f, 1.0f, 1.0f, 0.2f);

    void Start()
    {
        ps = GetComponent<ParticleSystem>();

        var mainModule = ps.main;
        mainModule.startLifetime = 1.0f;

        // make particles less random to more clearly see effect of lifetime.
        var shapeModule = ps.shape;
        shapeModule.radius = 0.1f;
        shapeModule.angle = 1.0f;

        var main = ps.main;
        main.simulationSpace = ParticleSystemSimulationSpace.World;

        // add a sphere so we can see our transform position as it moves
        var sphere = GameObject.CreatePrimitive(PrimitiveType.Sphere);
        sphere.transform.parent = ps.transform;
    }

    void Update()
    {
        var lifetimeByEmitterSpeed = ps.lifetimeByEmitterSpeed;
        lifetimeByEmitterSpeed.enabled = moduleEnabled;
        lifetimeByEmitterSpeed.range = new Vector2(0, maxSpeed);
        lifetimeByEmitterSpeed.curve = new ParticleSystem.MinMaxCurve(1f, curve);

        ps.transform.position = new Vector3(Mathf.Sin(Time.time * 2.0f) * 4.0f, 0.0f, 0.0f);
    }

    void OnGUI()
    {
        moduleEnabled = GUI.Toggle(new Rect(25, 45, 100, 30), moduleEnabled, "Enabled");
        maxSpeed = GUI.HorizontalSlider(new Rect(25, 85, 100, 30), maxSpeed, 0.0f, 10.0f);
    }
}