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Unity Engine

SetInfluence(int, ParticleSystemForceField)

Assigns the Force Field at the given index in the influencers list.
Read time 1 minuteLast updated 10 days ago

Definition

  • Type: Method
  • Namespace: UnityEngine
  • Assembly: UnityEngine.ParticleSystemModule
public void SetInfluence(int index, ParticleSystemForceField field)

Parameters

index

int
Index to assign the Force Field.

field

ParticleSystemForceField
Force Field that to assign.

Remarks

When ParticleSystem.ExternalForcesModule.influenceFilter is set to ParticleSystemGameObjectFilter.List then only Force Fields in the influencers list affect the Particle System.

Examples

using UnityEngine;public class Example : MonoBehaviour{    public ParticleSystem system;    public ParticleSystemForceField field1;    public ParticleSystemForceField field2;    ParticleSystem.ExternalForcesModule m_ExternalForcesModule;    void Start()    {        if (system == null)        {            Debug.LogError("Please assign a Particle System to `system`.");            enabled = false;            return;        }        if (field1 == null || field2 == null)        {            Debug.LogError("Please assign a ParticleSystemForceField to `field1` and `field2`.");            enabled = false;            return;        }        m_ExternalForcesModule = system.externalForces;        m_ExternalForcesModule.enabled = true;        m_ExternalForcesModule.influenceFilter = ParticleSystemGameObjectFilter.List;        m_ExternalForcesModule.AddInfluence(field1);    }    void OnGUI()    {        Debug.Assert(m_ExternalForcesModule.influenceCount == 1);        var currentForceField = m_ExternalForcesModule.GetInfluence(0);        GUILayout.BeginHorizontal();        GUILayout.Label("Influence: " + currentForceField.name);        if (GUILayout.Button("Toggle"))        {            m_ExternalForcesModule.SetInfluence(0, currentForceField == field1 ? field2 : field1);        }        GUILayout.EndHorizontal();    }}