ParticleSystem.sizeBySpeed

Description

Access the particle system size by speed module.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Start() {
        ParticleSystem ps = GetComponent<ParticleSystem>();
        var ss = ps.sizeBySpeed;
        ss.enabled = true;
        ss.range = new Vector2(0.0f, 2.0f);

        AnimationCurve curve = new AnimationCurve();
        curve.AddKey(0.0f, 0.1f);
        curve.AddKey(0.75f, 1.0f);
        ss.size = new ParticleSystem.MinMaxCurve(10.0f, curve);
    }
}