Add demo

Assets/Coffee/UIExtentions/UIParticle/Demo.meta

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Assets/Coffee/UIExtentions/UIParticle/Demo/Particle System (Fire).prefab.meta

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Assets/Coffee/UIExtentions/UIParticle/Demo/UIParticleSystem_Demo.cs

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+/// Credit glennpow, Zarlang
+/// Sourced from - http://forum.unity3d.com/threads/free-script-particle-systems-in-ui-screen-space-overlay.406862/
+/// Updated by Zarlang with a more robust implementation, including TextureSheet annimation support
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Coffee.UIExtensions.Demos
+{
+#if UNITY_5_3_OR_NEWER
+    [ExecuteInEditMode]
+    [RequireComponent(typeof(CanvasRenderer), typeof(ParticleSystem))]
+    public class UIParticleSystem_Demo : MaskableGraphic
+    {
+        [Tooltip("Having this enabled run the system in LateUpdate rather than in Update making it faster but less precise (more clunky)")]
+        public bool fixedTime = true;
+
+        private Transform _transform;
+        private ParticleSystem pSystem;
+        private ParticleSystem.Particle[] particles;
+        private UIVertex[] _quad = new UIVertex[4];
+        private Vector4 imageUV = Vector4.zero;
+        private ParticleSystem.TextureSheetAnimationModule textureSheetAnimation;
+        private int textureSheetAnimationFrames;
+        private Vector2 textureSheetAnimationFrameSize;
+        private ParticleSystemRenderer pRenderer;
+
+        private Material currentMaterial;
+
+        private Texture currentTexture;
+
+#if UNITY_5_5_OR_NEWER
+        private ParticleSystem.MainModule mainModule;
+#endif
+
+        public override Texture mainTexture
+        {
+            get
+            {
+                return currentTexture;
+            }
+        }
+
+        protected bool Initialize()
+        {
+            // initialize members
+            if (_transform == null)
+            {
+                _transform = transform;
+            }
+            if (pSystem == null)
+            {
+                pSystem = GetComponent<ParticleSystem>();
+
+                if (pSystem == null)
+                {
+                    return false;
+                }
+
+#if UNITY_5_5_OR_NEWER
+                mainModule = pSystem.main;
+                if (pSystem.main.maxParticles > 14000)
+                {
+                    mainModule.maxParticles = 14000;
+                }
+#else
+                    if (pSystem.maxParticles > 14000)
+                        pSystem.maxParticles = 14000;
+#endif
+
+                pRenderer = pSystem.GetComponent<ParticleSystemRenderer>();
+                if (pRenderer != null)
+                    pRenderer.enabled = false;
+
+                //Shader foundShader = Shader.Find("UI Extensions/Particles/Additive");
+                //Material pMaterial = new Material(foundShader);
+
+                //if (material == null)
+                    //material = pMaterial;
+
+                currentMaterial = material;
+                if (currentMaterial && currentMaterial.HasProperty("_MainTex"))
+                {
+                    currentTexture = currentMaterial.mainTexture;
+                    if (currentTexture == null)
+                        currentTexture = Texture2D.whiteTexture;
+                }
+                material = currentMaterial;
+                // automatically set scaling
+#if UNITY_5_5_OR_NEWER
+                mainModule.scalingMode = ParticleSystemScalingMode.Hierarchy;
+#else
+                    pSystem.scalingMode = ParticleSystemScalingMode.Hierarchy;
+#endif
+
+                particles = null;
+            }
+#if UNITY_5_5_OR_NEWER
+            if (particles == null)
+                particles = new ParticleSystem.Particle[pSystem.main.maxParticles];
+#else
+                if (particles == null)
+                    particles = new ParticleSystem.Particle[pSystem.maxParticles];
+#endif
+
+            imageUV = new Vector4(0, 0, 1, 1);
+
+            // prepare texture sheet animation
+            textureSheetAnimation = pSystem.textureSheetAnimation;
+            textureSheetAnimationFrames = 0;
+            textureSheetAnimationFrameSize = Vector2.zero;
+            if (textureSheetAnimation.enabled)
+            {
+                textureSheetAnimationFrames = textureSheetAnimation.numTilesX * textureSheetAnimation.numTilesY;
+                textureSheetAnimationFrameSize = new Vector2(1f / textureSheetAnimation.numTilesX, 1f / textureSheetAnimation.numTilesY);
+            }
+
+            return true;
+        }
+
+        protected override void Awake()
+        {
+            base.Awake();
+            if (!Initialize())
+                enabled = false;
+        }
+
+
+        protected override void OnPopulateMesh(VertexHelper vh)
+        {
+#if UNITY_EDITOR
+            if (!Application.isPlaying)
+            {
+                if (!Initialize())
+                {
+                    return;
+                }
+            }
+#endif
+            // prepare vertices
+            vh.Clear();
+
+            if (!gameObject.activeInHierarchy)
+            {
+                return;
+            }
+
+            Vector2 temp = Vector2.zero;
+            Vector2 corner1 = Vector2.zero;
+            Vector2 corner2 = Vector2.zero;
+            // iterate through current particles
+            int count = pSystem.GetParticles(particles);
+
+            for (int i = 0; i < count; ++i)
+            {
+                ParticleSystem.Particle particle = particles[i];
+
+                // get particle properties
+#if UNITY_5_5_OR_NEWER
+                Vector2 position = (mainModule.simulationSpace == ParticleSystemSimulationSpace.Local ? particle.position : _transform.InverseTransformPoint(particle.position));
+#else
+                    Vector2 position = (pSystem.simulationSpace == ParticleSystemSimulationSpace.Local ? particle.position : _transform.InverseTransformPoint(particle.position));
+#endif
+                float rotation = -particle.rotation * Mathf.Deg2Rad;
+                float rotation90 = rotation + Mathf.PI / 2;
+                Color32 color = particle.GetCurrentColor(pSystem);
+                float size = particle.GetCurrentSize(pSystem) * 0.5f;
+
+                // apply scale
+#if UNITY_5_5_OR_NEWER
+                if (mainModule.scalingMode == ParticleSystemScalingMode.Shape)
+                    position /= canvas.scaleFactor;
+#else
+                    if (pSystem.scalingMode == ParticleSystemScalingMode.Shape)
+                        position /= canvas.scaleFactor;
+#endif
+
+                // apply texture sheet animation
+                Vector4 particleUV = imageUV;
+                if (textureSheetAnimation.enabled)
+                {
+#if UNITY_5_5_OR_NEWER
+                    float frameProgress = 1 - (particle.remainingLifetime / particle.startLifetime);
+
+                    if (textureSheetAnimation.frameOverTime.curveMin != null)
+                    {
+                        frameProgress = textureSheetAnimation.frameOverTime.curveMin.Evaluate(1 - (particle.remainingLifetime / particle.startLifetime));
+                    }
+                    else if (textureSheetAnimation.frameOverTime.curve != null)
+                    {
+                        frameProgress = textureSheetAnimation.frameOverTime.curve.Evaluate(1 - (particle.remainingLifetime / particle.startLifetime));
+                    }
+                    else if (textureSheetAnimation.frameOverTime.constant > 0)
+                    {
+                        frameProgress = textureSheetAnimation.frameOverTime.constant - (particle.remainingLifetime / particle.startLifetime);
+                    }
+#else
+                    float frameProgress = 1 - (particle.lifetime / particle.startLifetime);
+#endif
+
+                    frameProgress = Mathf.Repeat(frameProgress * textureSheetAnimation.cycleCount, 1);
+                    int frame = 0;
+
+                    switch (textureSheetAnimation.animation)
+                    {
+
+                        case ParticleSystemAnimationType.WholeSheet:
+                            frame = Mathf.FloorToInt(frameProgress * textureSheetAnimationFrames);
+                            break;
+
+                        case ParticleSystemAnimationType.SingleRow:
+                            frame = Mathf.FloorToInt(frameProgress * textureSheetAnimation.numTilesX);
+
+                            int row = textureSheetAnimation.rowIndex;
+                            //                    if (textureSheetAnimation.useRandomRow) { // FIXME - is this handled internally by rowIndex?
+                            //                        row = Random.Range(0, textureSheetAnimation.numTilesY, using: particle.randomSeed);
+                            //                    }
+                            frame += row * textureSheetAnimation.numTilesX;
+                            break;
+
+                    }
+
+                    frame %= textureSheetAnimationFrames;
+
+                    particleUV.x = (frame % textureSheetAnimation.numTilesX) * textureSheetAnimationFrameSize.x;
+                    particleUV.y = Mathf.FloorToInt(frame / textureSheetAnimation.numTilesX) * textureSheetAnimationFrameSize.y;
+                    particleUV.z = particleUV.x + textureSheetAnimationFrameSize.x;
+                    particleUV.w = particleUV.y + textureSheetAnimationFrameSize.y;
+                }
+
+                temp.x = particleUV.x;
+                temp.y = particleUV.y;
+
+                _quad[0] = UIVertex.simpleVert;
+                _quad[0].color = color;
+                _quad[0].uv0 = temp;
+
+                temp.x = particleUV.x;
+                temp.y = particleUV.w;
+                _quad[1] = UIVertex.simpleVert;
+                _quad[1].color = color;
+                _quad[1].uv0 = temp;
+
+                temp.x = particleUV.z;
+                temp.y = particleUV.w;
+                _quad[2] = UIVertex.simpleVert;
+                _quad[2].color = color;
+                _quad[2].uv0 = temp;
+
+                temp.x = particleUV.z;
+                temp.y = particleUV.y;
+                _quad[3] = UIVertex.simpleVert;
+                _quad[3].color = color;
+                _quad[3].uv0 = temp;
+
+                if (rotation == 0)
+                {
+                    // no rotation
+                    corner1.x = position.x - size;
+                    corner1.y = position.y - size;
+                    corner2.x = position.x + size;
+                    corner2.y = position.y + size;
+
+                    temp.x = corner1.x;
+                    temp.y = corner1.y;
+                    _quad[0].position = temp;
+                    temp.x = corner1.x;
+                    temp.y = corner2.y;
+                    _quad[1].position = temp;
+                    temp.x = corner2.x;
+                    temp.y = corner2.y;
+                    _quad[2].position = temp;
+                    temp.x = corner2.x;
+                    temp.y = corner1.y;
+                    _quad[3].position = temp;
+                }
+                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;
+                }
+
+                vh.AddUIVertexQuad(_quad);
+            }
+        }
+
+        void Update()
+        {
+            if (!fixedTime && Application.isPlaying)
+            {
+                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();
+                }
+            }
+        }
+
+        void LateUpdate()
+        {
+            if (!Application.isPlaying)
+            {
+                SetAllDirty();
+            }
+            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();
+        }
+    }
+#endif
+}

Assets/Coffee/UIExtentions/UIParticle/Demo/UIParticleSystem_Demo.cs.meta

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Assets/Coffee/UIExtentions/UIParticle/Demo/UIParticle_Demo.cs

@@ -0,0 +1,12 @@
+using UnityEngine;
+
+namespace Coffee.UIExtensions.Demo
+{
+	public class UIParticle_Demo : MonoBehaviour
+	{
+		public void SetTimeScale(float scale)
+		{
+			Time.timeScale = scale;
+		}
+	}
+}

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