ParticleSystem.rotationBySpeed

説明

Script interface for the Particle System Rotation by Speed module.

Rotate particles based on their speed.

Particle System modules do not need to be reassigned back to the system; they are interfaces and not independent objects.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Start() {
        ParticleSystem ps = GetComponent<ParticleSystem>();
        var rot = ps.rotationBySpeed;
        rot.enabled = true;

        AnimationCurve curve = new AnimationCurve();
        curve.AddKey(0.0f, 0.1f);
        curve.AddKey(0.75f, 0.6f);

        AnimationCurve curve2 = new AnimationCurve();
        curve2.AddKey(0.0f, 0.2f);
        curve2.AddKey(0.5f, 0.9f);

        rot.z = new ParticleSystem.MinMaxCurve(2.0f, curve, curve2);
    }
}