alphaAffectsIntensity
Toggle whether the system multiplies the particle alpha by the light intensity when it computes the final light intensity.
Read time 1 minuteLast updated 6 days ago
Definition
- Type: Property
- Namespace: UnityEngine
- Assembly: UnityEngine.ParticleSystemModule
public bool alphaAffectsIntensity { get; set; }
Remarks
This is useful to fade the Lights out at the same time as the particles, to avoid popping.
Examples
using UnityEngine;using System.Collections;// For best results, use Deferred Rendering (see Camera settings)[RequireComponent(typeof(ParticleSystem))]public class ExampleClass : MonoBehaviour{ private ParticleSystem ps; public Light lightPrefab; // Provide a light Prefab in the inspector (eg a default Point Light) public float hSliderValueA = 1.0f; public bool alphaAffectsIntensity = true; void Start() { ps = GetComponent<ParticleSystem>(); ps.transform.localRotation = Quaternion.Euler(0.0f, 0.0f, 45.0f); var shape = ps.shape; shape.shapeType = ParticleSystemShapeType.Circle; var lights = ps.lights; lights.enabled = true; lights.light = lightPrefab; lights.ratio = 1.0f; lights.maxLights = 1000; // plane to receive lights var plane = GameObject.CreatePrimitive(PrimitiveType.Plane); plane.transform.parent = ps.transform; plane.transform.localPosition = new Vector3(0.0f, 0.0f, 3.0f); plane.transform.localScale = new Vector3(20.0f, 20.0f, 20.0f); plane.transform.localRotation = Quaternion.Euler(-90.0f, 0.0f, 0.0f); var material = new Material(Shader.Find("Standard")); material.color = new Color(0.1f, 0.1f, 0.1f, 1.0f); plane.GetComponent<MeshRenderer>().material = material; } void Update() { var lights = ps.lights; lights.alphaAffectsIntensity = alphaAffectsIntensity; var main = ps.main; main.startColor = new Color(1.0f, 1.0f, 1.0f, hSliderValueA); } void OnGUI() { GUI.Label(new Rect(25, 40, 100, 30), "Alpha"); hSliderValueA = GUI.HorizontalSlider(new Rect(95, 45, 100, 30), hSliderValueA, 0.0f, 1.0f); alphaAffectsIntensity = GUI.Toggle(new Rect(25, 85, 200, 30), alphaAffectsIntensity, "Particle Alpha Affects Light Intensity"); }}