2017-08-11 22:53:23 +08:00
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/// Credit glennpow, Zarlang
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2017-06-29 21:07:29 +08:00
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/// Sourced from - http://forum.unity3d.com/threads/free-script-particle-systems-in-ui-screen-space-overlay.406862/
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2020-07-09 03:38:28 +08:00
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/// Updated by Zarlang with a more robust implementation, including TextureSheet animation support
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2017-06-29 21:07:29 +08:00
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namespace UnityEngine.UI.Extensions
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{
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#if UNITY_5_3_OR_NEWER
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[ExecuteInEditMode]
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2017-08-11 20:15:42 +08:00
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[RequireComponent(typeof(CanvasRenderer), typeof(ParticleSystem))]
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[AddComponentMenu("UI/Effects/Extensions/UIParticleSystem")]
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2017-06-29 21:07:29 +08:00
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public class UIParticleSystem : MaskableGraphic
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{
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2017-08-11 20:15:42 +08:00
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[Tooltip("Having this enabled run the system in LateUpdate rather than in Update making it faster but less precise (more clunky)")]
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public bool fixedTime = true;
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2017-06-29 21:07:29 +08:00
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2018-09-25 21:12:04 +08:00
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[Tooltip("Enables 3d rotation for the particles")]
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public bool use3dRotation = false;
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2017-06-29 21:07:29 +08:00
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private Transform _transform;
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2017-08-11 20:15:42 +08:00
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private ParticleSystem pSystem;
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private ParticleSystem.Particle[] particles;
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2017-06-29 21:07:29 +08:00
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private UIVertex[] _quad = new UIVertex[4];
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2017-08-11 20:15:42 +08:00
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private Vector4 imageUV = Vector4.zero;
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private ParticleSystem.TextureSheetAnimationModule textureSheetAnimation;
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private int textureSheetAnimationFrames;
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private Vector2 textureSheetAnimationFrameSize;
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private ParticleSystemRenderer pRenderer;
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2020-04-19 18:42:58 +08:00
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private bool isInitialised = false;
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2017-08-11 20:15:42 +08:00
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private Material currentMaterial;
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private Texture currentTexture;
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#if UNITY_5_5_OR_NEWER
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private ParticleSystem.MainModule mainModule;
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#endif
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2017-06-29 21:07:29 +08:00
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public override Texture mainTexture
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{
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get
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{
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2017-08-11 20:15:42 +08:00
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return currentTexture;
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2017-06-29 21:07:29 +08:00
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}
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}
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protected bool Initialize()
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{
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// initialize members
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if (_transform == null)
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{
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_transform = transform;
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}
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2017-08-11 20:15:42 +08:00
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if (pSystem == null)
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2017-06-29 21:07:29 +08:00
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{
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2017-08-11 20:15:42 +08:00
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pSystem = GetComponent<ParticleSystem>();
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2017-06-29 21:07:29 +08:00
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2017-08-11 20:15:42 +08:00
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if (pSystem == null)
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2017-06-29 21:07:29 +08:00
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{
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return false;
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}
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2017-08-11 20:15:42 +08:00
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#if UNITY_5_5_OR_NEWER
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mainModule = pSystem.main;
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if (pSystem.main.maxParticles > 14000)
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2017-06-29 21:07:29 +08:00
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{
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mainModule.maxParticles = 14000;
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2017-06-29 21:07:29 +08:00
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}
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2017-08-11 20:15:42 +08:00
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#else
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if (pSystem.maxParticles > 14000)
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pSystem.maxParticles = 14000;
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#endif
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2017-06-29 21:07:29 +08:00
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2017-08-11 20:15:42 +08:00
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pRenderer = pSystem.GetComponent<ParticleSystemRenderer>();
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if (pRenderer != null)
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pRenderer.enabled = false;
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2017-06-29 21:07:29 +08:00
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2017-08-11 20:15:42 +08:00
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if (material == null)
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2018-06-27 03:15:42 +08:00
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{
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2020-10-24 02:10:51 +08:00
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var foundShader = ShaderLibrary.GetShaderInstance("UI Extensions/Particles/Additive");
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2018-06-27 03:15:42 +08:00
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if (foundShader)
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{
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material = new Material(foundShader);
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}
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}
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2017-08-11 20:15:42 +08:00
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currentMaterial = material;
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if (currentMaterial && currentMaterial.HasProperty("_MainTex"))
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2017-06-29 21:07:29 +08:00
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{
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2017-08-11 20:15:42 +08:00
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currentTexture = currentMaterial.mainTexture;
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if (currentTexture == null)
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currentTexture = Texture2D.whiteTexture;
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2017-06-29 21:07:29 +08:00
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}
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2017-08-11 20:15:42 +08:00
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material = currentMaterial;
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// automatically set scaling
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#if UNITY_5_5_OR_NEWER
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mainModule.scalingMode = ParticleSystemScalingMode.Hierarchy;
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#else
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pSystem.scalingMode = ParticleSystemScalingMode.Hierarchy;
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2017-06-29 21:07:29 +08:00
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#endif
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2017-08-11 20:15:42 +08:00
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particles = null;
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2017-06-29 21:07:29 +08:00
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}
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2017-08-11 20:15:42 +08:00
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#if UNITY_5_5_OR_NEWER
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if (particles == null)
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particles = new ParticleSystem.Particle[pSystem.main.maxParticles];
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#else
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if (particles == null)
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particles = new ParticleSystem.Particle[pSystem.maxParticles];
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#endif
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2017-06-29 21:07:29 +08:00
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2017-08-11 20:15:42 +08:00
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imageUV = new Vector4(0, 0, 1, 1);
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2017-06-29 21:07:29 +08:00
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// prepare texture sheet animation
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2017-08-11 20:15:42 +08:00
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textureSheetAnimation = pSystem.textureSheetAnimation;
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textureSheetAnimationFrames = 0;
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textureSheetAnimationFrameSize = Vector2.zero;
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if (textureSheetAnimation.enabled)
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2017-06-29 21:07:29 +08:00
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{
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2017-08-11 20:15:42 +08:00
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textureSheetAnimationFrames = textureSheetAnimation.numTilesX * textureSheetAnimation.numTilesY;
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textureSheetAnimationFrameSize = new Vector2(1f / textureSheetAnimation.numTilesX, 1f / textureSheetAnimation.numTilesY);
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2017-06-29 21:07:29 +08:00
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}
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return true;
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}
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protected override void Awake()
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{
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base.Awake();
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if (!Initialize())
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enabled = false;
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}
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2017-08-11 20:15:42 +08:00
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2017-06-29 21:07:29 +08:00
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protected override void OnPopulateMesh(VertexHelper vh)
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{
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#if UNITY_EDITOR
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if (!Application.isPlaying)
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{
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if (!Initialize())
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{
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return;
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}
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}
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#endif
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// prepare vertices
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vh.Clear();
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if (!gameObject.activeInHierarchy)
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{
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return;
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}
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2020-04-19 18:42:58 +08:00
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if (!isInitialised && !pSystem.main.playOnAwake)
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{
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pSystem.Stop(false, ParticleSystemStopBehavior.StopEmittingAndClear);
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isInitialised = true;
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}
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2017-08-11 20:15:42 +08:00
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Vector2 temp = Vector2.zero;
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Vector2 corner1 = Vector2.zero;
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Vector2 corner2 = Vector2.zero;
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2017-06-29 21:07:29 +08:00
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// iterate through current particles
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2017-08-11 20:15:42 +08:00
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int count = pSystem.GetParticles(particles);
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2017-06-29 21:07:29 +08:00
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for (int i = 0; i < count; ++i)
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{
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2017-08-11 20:15:42 +08:00
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ParticleSystem.Particle particle = particles[i];
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2017-06-29 21:07:29 +08:00
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// get particle properties
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2017-08-11 20:15:42 +08:00
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#if UNITY_5_5_OR_NEWER
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Vector2 position = (mainModule.simulationSpace == ParticleSystemSimulationSpace.Local ? particle.position : _transform.InverseTransformPoint(particle.position));
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#else
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Vector2 position = (pSystem.simulationSpace == ParticleSystemSimulationSpace.Local ? particle.position : _transform.InverseTransformPoint(particle.position));
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#endif
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2017-06-29 21:07:29 +08:00
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float rotation = -particle.rotation * Mathf.Deg2Rad;
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float rotation90 = rotation + Mathf.PI / 2;
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2017-08-11 20:15:42 +08:00
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Color32 color = particle.GetCurrentColor(pSystem);
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float size = particle.GetCurrentSize(pSystem) * 0.5f;
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2017-06-29 21:07:29 +08:00
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// apply scale
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2017-08-11 20:15:42 +08:00
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#if UNITY_5_5_OR_NEWER
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if (mainModule.scalingMode == ParticleSystemScalingMode.Shape)
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2017-06-29 21:07:29 +08:00
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position /= canvas.scaleFactor;
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2017-08-11 20:15:42 +08:00
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#else
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if (pSystem.scalingMode == ParticleSystemScalingMode.Shape)
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position /= canvas.scaleFactor;
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#endif
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2017-06-29 21:07:29 +08:00
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// apply texture sheet animation
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2017-08-11 20:15:42 +08:00
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Vector4 particleUV = imageUV;
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if (textureSheetAnimation.enabled)
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2017-06-29 21:07:29 +08:00
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{
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#if UNITY_5_5_OR_NEWER
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float frameProgress = 1 - (particle.remainingLifetime / particle.startLifetime);
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2017-08-11 20:15:42 +08:00
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if (textureSheetAnimation.frameOverTime.curveMin != null)
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{
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frameProgress = textureSheetAnimation.frameOverTime.curveMin.Evaluate(1 - (particle.remainingLifetime / particle.startLifetime));
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}
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else if (textureSheetAnimation.frameOverTime.curve != null)
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{
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frameProgress = textureSheetAnimation.frameOverTime.curve.Evaluate(1 - (particle.remainingLifetime / particle.startLifetime));
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}
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else if (textureSheetAnimation.frameOverTime.constant > 0)
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{
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frameProgress = textureSheetAnimation.frameOverTime.constant - (particle.remainingLifetime / particle.startLifetime);
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}
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2017-06-30 16:18:16 +08:00
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#else
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2017-06-29 21:07:29 +08:00
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float frameProgress = 1 - (particle.lifetime / particle.startLifetime);
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2017-07-01 00:29:36 +08:00
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#endif
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2017-08-11 20:15:42 +08:00
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frameProgress = Mathf.Repeat(frameProgress * textureSheetAnimation.cycleCount, 1);
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2017-06-29 21:07:29 +08:00
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int frame = 0;
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2017-08-11 20:15:42 +08:00
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switch (textureSheetAnimation.animation)
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2017-06-29 21:07:29 +08:00
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{
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case ParticleSystemAnimationType.WholeSheet:
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2017-08-11 20:15:42 +08:00
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frame = Mathf.FloorToInt(frameProgress * textureSheetAnimationFrames);
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2017-06-29 21:07:29 +08:00
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break;
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case ParticleSystemAnimationType.SingleRow:
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2017-08-11 20:15:42 +08:00
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frame = Mathf.FloorToInt(frameProgress * textureSheetAnimation.numTilesX);
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2017-06-29 21:07:29 +08:00
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2017-08-11 20:15:42 +08:00
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int row = textureSheetAnimation.rowIndex;
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2020-10-31 23:09:41 +08:00
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#if UNITY_2019_OR_NEWER
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2020-10-24 18:36:40 +08:00
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if (textureSheetAnimation.rowMode == ParticleSystemAnimationRowMode.Random)
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2020-10-31 23:09:41 +08:00
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#else
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if (textureSheetAnimation.useRandomRow)
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#endif
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2020-10-24 18:36:40 +08:00
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{ // FIXME - is this handled internally by rowIndex?
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row = Mathf.Abs((int)particle.randomSeed % textureSheetAnimation.numTilesY);
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}
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2017-08-11 20:15:42 +08:00
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frame += row * textureSheetAnimation.numTilesX;
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2017-06-29 21:07:29 +08:00
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break;
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}
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2017-08-11 20:15:42 +08:00
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frame %= textureSheetAnimationFrames;
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2017-06-29 21:07:29 +08:00
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2017-08-11 20:15:42 +08:00
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particleUV.x = (frame % textureSheetAnimation.numTilesX) * textureSheetAnimationFrameSize.x;
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2020-10-24 18:36:40 +08:00
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particleUV.y = 1.0f - ((frame / textureSheetAnimation.numTilesX) + 1) * textureSheetAnimationFrameSize.y;
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2017-08-11 20:15:42 +08:00
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particleUV.z = particleUV.x + textureSheetAnimationFrameSize.x;
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particleUV.w = particleUV.y + textureSheetAnimationFrameSize.y;
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2017-06-29 21:07:29 +08:00
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}
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2017-08-11 20:15:42 +08:00
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temp.x = particleUV.x;
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temp.y = particleUV.y;
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2017-06-29 21:07:29 +08:00
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_quad[0] = UIVertex.simpleVert;
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_quad[0].color = color;
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2017-08-11 20:15:42 +08:00
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_quad[0].uv0 = temp;
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2017-06-29 21:07:29 +08:00
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2017-08-11 20:15:42 +08:00
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temp.x = particleUV.x;
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temp.y = particleUV.w;
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2017-06-29 21:07:29 +08:00
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_quad[1] = UIVertex.simpleVert;
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_quad[1].color = color;
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2017-08-11 20:15:42 +08:00
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_quad[1].uv0 = temp;
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2017-06-29 21:07:29 +08:00
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2017-08-11 20:15:42 +08:00
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temp.x = particleUV.z;
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temp.y = particleUV.w;
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2017-06-29 21:07:29 +08:00
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_quad[2] = UIVertex.simpleVert;
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_quad[2].color = color;
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2017-08-11 20:15:42 +08:00
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_quad[2].uv0 = temp;
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2017-06-29 21:07:29 +08:00
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2017-08-11 20:15:42 +08:00
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temp.x = particleUV.z;
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temp.y = particleUV.y;
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2017-06-29 21:07:29 +08:00
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_quad[3] = UIVertex.simpleVert;
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_quad[3].color = color;
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2017-08-11 20:15:42 +08:00
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_quad[3].uv0 = temp;
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2017-06-29 21:07:29 +08:00
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if (rotation == 0)
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{
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// no rotation
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2017-08-11 20:15:42 +08:00
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corner1.x = position.x - size;
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corner1.y = position.y - size;
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corner2.x = position.x + size;
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corner2.y = position.y + size;
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temp.x = corner1.x;
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temp.y = corner1.y;
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_quad[0].position = temp;
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temp.x = corner1.x;
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temp.y = corner2.y;
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_quad[1].position = temp;
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temp.x = corner2.x;
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temp.y = corner2.y;
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_quad[2].position = temp;
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temp.x = corner2.x;
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temp.y = corner1.y;
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_quad[3].position = temp;
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2017-06-29 21:07:29 +08:00
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}
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else
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{
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2018-09-25 21:12:04 +08:00
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if (use3dRotation)
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{
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// get particle properties
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#if UNITY_5_5_OR_NEWER
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Vector3 pos3d = (mainModule.simulationSpace == ParticleSystemSimulationSpace.Local ? particle.position : _transform.InverseTransformPoint(particle.position));
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#else
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Vector3 pos3d = (pSystem.simulationSpace == ParticleSystemSimulationSpace.Local ? particle.position : _transform.InverseTransformPoint(particle.position));
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#endif
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// apply scale
|
|
|
|
#if UNITY_5_5_OR_NEWER
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if (mainModule.scalingMode == ParticleSystemScalingMode.Shape)
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position /= canvas.scaleFactor;
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|
#else
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|
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if (pSystem.scalingMode == ParticleSystemScalingMode.Shape)
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position /= canvas.scaleFactor;
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#endif
|
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|
|
|
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Vector3[] verts = new Vector3[4]
|
|
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|
{
|
|
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|
new Vector3(-size, -size, 0),
|
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|
new Vector3(-size, size, 0),
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new Vector3(size, size, 0),
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|
new Vector3(size, -size, 0)
|
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|
};
|
|
|
|
|
|
|
|
Quaternion particleRotation = Quaternion.Euler(particle.rotation3D);
|
|
|
|
|
|
|
|
_quad[0].position = pos3d + particleRotation * verts[0];
|
|
|
|
_quad[1].position = pos3d + particleRotation * verts[1];
|
|
|
|
_quad[2].position = pos3d + particleRotation * verts[2];
|
|
|
|
_quad[3].position = pos3d + particleRotation * verts[3];
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
// apply rotation
|
|
|
|
Vector2 right = new Vector2(Mathf.Cos(rotation), Mathf.Sin(rotation)) * size;
|
|
|
|
Vector2 up = new Vector2(Mathf.Cos(rotation90), Mathf.Sin(rotation90)) * size;
|
|
|
|
|
|
|
|
_quad[0].position = position - right - up;
|
|
|
|
_quad[1].position = position - right + up;
|
|
|
|
_quad[2].position = position + right + up;
|
|
|
|
_quad[3].position = position + right - up;
|
|
|
|
}
|
2017-06-29 21:07:29 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
vh.AddUIVertexQuad(_quad);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-04-19 18:42:58 +08:00
|
|
|
private void Update()
|
2017-06-29 21:07:29 +08:00
|
|
|
{
|
2017-08-11 20:15:42 +08:00
|
|
|
if (!fixedTime && Application.isPlaying)
|
2017-06-29 21:07:29 +08:00
|
|
|
{
|
2017-08-11 20:15:42 +08:00
|
|
|
pSystem.Simulate(Time.unscaledDeltaTime, false, false, true);
|
2017-06-29 21:07:29 +08:00
|
|
|
SetAllDirty();
|
2017-08-11 20:15:42 +08:00
|
|
|
|
|
|
|
if ((currentMaterial != null && currentTexture != currentMaterial.mainTexture) ||
|
|
|
|
(material != null && currentMaterial != null && material.shader != currentMaterial.shader))
|
|
|
|
{
|
|
|
|
pSystem = null;
|
|
|
|
Initialize();
|
|
|
|
}
|
2017-06-29 21:07:29 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-04-19 18:42:58 +08:00
|
|
|
private void LateUpdate()
|
2017-06-29 21:07:29 +08:00
|
|
|
{
|
|
|
|
if (!Application.isPlaying)
|
|
|
|
{
|
|
|
|
SetAllDirty();
|
|
|
|
}
|
2017-08-11 20:15:42 +08:00
|
|
|
else
|
|
|
|
{
|
|
|
|
if (fixedTime)
|
|
|
|
{
|
|
|
|
pSystem.Simulate(Time.unscaledDeltaTime, false, false, true);
|
|
|
|
SetAllDirty();
|
|
|
|
if ((currentMaterial != null && currentTexture != currentMaterial.mainTexture) ||
|
|
|
|
(material != null && currentMaterial != null && material.shader != currentMaterial.shader))
|
|
|
|
{
|
|
|
|
pSystem = null;
|
|
|
|
Initialize();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (material == currentMaterial)
|
|
|
|
return;
|
|
|
|
pSystem = null;
|
|
|
|
Initialize();
|
2017-06-29 21:07:29 +08:00
|
|
|
}
|
2019-03-08 02:11:51 +08:00
|
|
|
|
|
|
|
protected override void OnDestroy()
|
2018-09-25 22:28:08 +08:00
|
|
|
{
|
|
|
|
currentMaterial = null;
|
|
|
|
currentTexture = null;
|
|
|
|
}
|
2020-04-19 18:42:58 +08:00
|
|
|
|
|
|
|
public void StartParticleEmission()
|
|
|
|
{
|
2020-09-28 21:45:01 +08:00
|
|
|
pSystem.time = 0;
|
2020-04-19 18:42:58 +08:00
|
|
|
pSystem.Play();
|
|
|
|
}
|
|
|
|
|
|
|
|
public void StopParticleEmission()
|
|
|
|
{
|
|
|
|
pSystem.Stop(false, ParticleSystemStopBehavior.StopEmittingAndClear);
|
|
|
|
}
|
|
|
|
|
|
|
|
public void PauseParticleEmission()
|
|
|
|
{
|
|
|
|
pSystem.Stop(false, ParticleSystemStopBehavior.StopEmitting);
|
|
|
|
}
|
2017-06-29 21:07:29 +08:00
|
|
|
}
|
|
|
|
#endif
|
2020-10-31 23:09:41 +08:00
|
|
|
}
|