ParticleSystem.ExternalForcesModule.influenceCount

描述

显式提供给影响因子列表的力场数量。

当 influenceFilter 设置为 ParticleSystemGameObjectFilter.List 时，只有影响因子列表中的力场才会影响粒子系统。

另请参阅：ParticleSystemForceField。

using UnityEngine;

public class Example : MonoBehaviour
{
    ParticleSystem.ExternalForcesModule externalForcesModule;

    void Start()
    {
        // Create a default particle system
        var particleSystemGameObject = new GameObject("Particle System");
        var system = particleSystemGameObject.AddComponent<ParticleSystem>();

        // Create a force field to influence the particle system
        var forceFieldGameObject = new GameObject("Force Field");
        var forceField = forceFieldGameObject.AddComponent<ParticleSystemForceField>();
        forceField.endRange = 5;
        forceFieldGameObject.transform.position = new Vector3(0, 0, 10);

        // Add the force to the particle systems external forces influencers.
        externalForcesModule = system.externalForces;
        externalForcesModule.enabled = true;
        externalForcesModule.influenceFilter = ParticleSystemGameObjectFilter.List;
        externalForcesModule.AddInfluence(forceField);
    }

    void OnGUI()
    {
        GUILayout.Label("Particle System Influencers:");
        for (int i = 0; i < externalForcesModule.influenceCount; ++i)
        {
            var influence = externalForcesModule.GetInfluence(i);
            GUILayout.Label(i + ": " + influence.name);
        }
    }
}