Version: 2021.2
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ParticleSystem.CollisionModule.maxKillSpeed

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public float maxKillSpeed;

Description

Kill particles whose speed goes above this threshold, after a collision.

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(ParticleSystem))] public class ExampleClass : MonoBehaviour { private ParticleSystem ps; public float hSliderValue = 8.0F;

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

var collision = ps.collision; collision.enabled = true; collision.type = ParticleSystemCollisionType.World; collision.mode = ParticleSystemCollisionMode.Collision3D;

var collider = GameObject.CreatePrimitive(PrimitiveType.Sphere); collider.transform.parent = ps.transform; collider.transform.localPosition = new Vector3(0.0f, 0.0f, 13.0f); collider.transform.localScale = new Vector3(20.0f, 20.0f, 20.0f); }

void Update() { var collision = ps.collision; collision.maxKillSpeed = hSliderValue; }

void OnGUI() { hSliderValue = GUI.HorizontalSlider(new Rect(25, 40, 100, 30), hSliderValue, 0.0F, 10.0F); } }