Version: 2022.3
LanguageEnglish
  • C#

ParticleSystem.VelocityOverLifetimeModule.speedModifier

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

Switch to Manual
public ParticleSystem.MinMaxCurve speedModifier;

Description

Curve to control particle speed based on lifetime, without affecting the direction of the particles.

Additional resources: MinMaxCurve.

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(ParticleSystem))] public class ExampleClass : MonoBehaviour { private ParticleSystem ps; public float hSliderValueSpeed = 1.0f;

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

var velocityOverLifetime = ps.velocityOverLifetime; velocityOverLifetime.enabled = true; velocityOverLifetime.space = ParticleSystemSimulationSpace.World;

AnimationCurve curve = new AnimationCurve(); curve.AddKey(0.0f, 0.0f); curve.AddKey(1.0f, 1.0f);

ParticleSystem.MinMaxCurve minMaxCurve = new ParticleSystem.MinMaxCurve(1.0f, curve);

velocityOverLifetime.speedModifier = minMaxCurve; }

void Update() { var velocityOverLifetime = ps.velocityOverLifetime; velocityOverLifetime.speedModifierMultiplier = hSliderValueSpeed; }

void OnGUI() { GUI.Label(new Rect(25, 40, 100, 30), "Speed");

hSliderValueSpeed = GUI.HorizontalSlider(new Rect(55, 45, 100, 30), hSliderValueSpeed, -50.0f, 50.0f); } }