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Assets/Spine Examples/Scripts/Sample Components/Ghost/Shaders.meta

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Assets/Spine Examples/Scripts/Sample Components/Ghost/Shaders/Spine-Special-Skeleton-Ghost.shader

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+// - Unlit + no shadow
+// - Premultiplied Alpha Blending (One OneMinusSrcAlpha)
+// - Double-sided, no depth
+
+Shader "Spine/Special/SkeletonGhost" {
+    Properties {
+		_Color ("Main Color", Color) = (1,1,1,1)
+		[NoScaleOffset] _MainTex ("Base (RGB) Alpha (A)", 2D) = "white" {}
+		_TextureFade ("Texture Fade Out", Range(0,1)) = 0
+		[HideInInspector] _StencilRef("Stencil Reference", Float) = 1.0
+		[HideInInspector][Enum(UnityEngine.Rendering.CompareFunction)] _StencilComp("Stencil Comparison", Float) = 8 // Set to Always as default
+    }
+    SubShader {
+		Tags {
+			"Queue"="Transparent"
+			"IgnoreProjector"="False"
+			"RenderType"="Transparent"
+		}
+		Fog { Mode Off }
+		Blend One OneMinusSrcAlpha
+		ZWrite Off
+		Cull Off
+
+		Stencil {
+			Ref[_StencilRef]
+			Comp[_StencilComp]
+			Pass Keep
+		}
+
+		Pass {
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			#include "UnityCG.cginc"
+			sampler2D _MainTex;
+			fixed4 _Color;
+			fixed _TextureFade;
+
+			struct VertexInput {
+				float4 vertex : POSITION;
+				float2 uv : TEXCOORD0;
+				float4 color : COLOR;
+			};
+
+			struct VertexOutput {
+			    float4  pos : SV_POSITION;
+			    float2  uv : TEXCOORD0;
+				float4 color : COLOR;
+			};
+
+			VertexOutput vert (VertexInput v) {
+			    VertexOutput o;
+			    o.pos = UnityObjectToClipPos(v.vertex);
+			    o.uv = v.uv;
+			    o.color = v.color;
+			    return o;
+			}
+
+			fixed4 frag (VertexOutput i) : SV_Target {
+			    fixed4 tc = tex2D(_MainTex, i.uv);
+				tc = fixed4(max(_TextureFade, tc.r), max(_TextureFade, tc.g), max(_TextureFade, tc.b), tc.a);
+				return tc * ((i.color * _Color) * tc.a);
+			}
+			ENDCG
+		}
+    }
+}

Assets/Spine Examples/Scripts/Sample Components/Ghost/Shaders/Spine-Special-Skeleton-Ghost.shader.meta

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Assets/Spine Examples/Scripts/Sample Components/Ghost/SkeletonGhost.cs

@@ -0,0 +1,201 @@
+/******************************************************************************
+ * Spine Runtimes License Agreement
+ * Last updated January 1, 2020. Replaces all prior versions.
+ *
+ * Copyright (c) 2013-2020, Esoteric Software LLC
+ *
+ * Integration of the Spine Runtimes into software or otherwise creating
+ * derivative works of the Spine Runtimes is permitted under the terms and
+ * conditions of Section 2 of the Spine Editor License Agreement:
+ * http://esotericsoftware.com/spine-editor-license
+ *
+ * Otherwise, it is permitted to integrate the Spine Runtimes into software
+ * or otherwise create derivative works of the Spine Runtimes (collectively,
+ * "Products"), provided that each user of the Products must obtain their own
+ * Spine Editor license and redistribution of the Products in any form must
+ * include this license and copyright notice.
+ *
+ * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
+ * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *****************************************************************************/
+
+// Contributed by: Mitch Thompson
+
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Spine.Unity.Examples {
+
+	[RequireComponent(typeof(SkeletonRenderer))]
+	public class SkeletonGhost : MonoBehaviour {
+		// Internal Settings
+		const HideFlags GhostHideFlags = HideFlags.HideInHierarchy;
+		const string GhostingShaderName = "Spine/Special/SkeletonGhost";
+
+		[Header("Animation")]
+		public bool ghostingEnabled = true;
+		[Tooltip("The time between invididual ghost pieces being spawned.")]
+		[UnityEngine.Serialization.FormerlySerializedAs("spawnRate")]
+		public float spawnInterval = 1f / 30f;
+		[Tooltip("Maximum number of ghosts that can exist at a time. If the fade speed is not fast enough, the oldest ghost will immediately disappear to enforce the maximum number.")]
+		public int maximumGhosts = 10;
+		public float fadeSpeed = 10;
+
+		[Header("Rendering")]
+		public Shader ghostShader;
+		public Color32 color = new Color32(0xFF, 0xFF, 0xFF, 0x00); // default for additive.
+		[Tooltip("Remember to set color alpha to 0 if Additive is true")]
+		public bool additive = true;
+		[Tooltip("0 is Color and Alpha, 1 is Alpha only.")]
+		[Range(0, 1)]
+		public float textureFade = 1;
+
+		[Header("Sorting")]
+		public bool sortWithDistanceOnly;
+		public float zOffset = 0f;
+
+		float nextSpawnTime;
+		SkeletonGhostRenderer[] pool;
+		int poolIndex = 0;
+		SkeletonRenderer skeletonRenderer;
+		MeshRenderer meshRenderer;
+		MeshFilter meshFilter;
+
+		readonly Dictionary<Material, Material> materialTable = new Dictionary<Material, Material>();
+
+		void Start () {
+			Initialize(false);
+		}
+
+		public void Initialize (bool overwrite) {
+			if (pool == null || overwrite) {
+				if (ghostShader == null)
+					ghostShader = Shader.Find(GhostingShaderName);
+
+				skeletonRenderer = GetComponent<SkeletonRenderer>();
+				meshFilter = GetComponent<MeshFilter>();
+				meshRenderer = GetComponent<MeshRenderer>();
+				nextSpawnTime = Time.time + spawnInterval;
+				pool = new SkeletonGhostRenderer[maximumGhosts];
+				for (int i = 0; i < maximumGhosts; i++) {
+					GameObject go = new GameObject(gameObject.name + " Ghost", typeof(SkeletonGhostRenderer));
+					pool[i] = go.GetComponent<SkeletonGhostRenderer>();
+					go.SetActive(false);
+					go.hideFlags = GhostHideFlags;
+				}
+
+				var skeletonAnimation = skeletonRenderer as Spine.Unity.IAnimationStateComponent;
+				if (skeletonAnimation != null)
+					skeletonAnimation.AnimationState.Event += OnEvent;
+			}
+		}
+
+		//SkeletonAnimation
+		/*
+		 *	Int Value:		0 sets ghostingEnabled to false, 1 sets ghostingEnabled to true
+		 *	Float Value:	Values greater than 0 set the spawnRate equal the float value
+		 *	String Value:	Pass RGBA hex color values in to set the color property. IE: "A0FF8BFF"
+		 */
+		void OnEvent (Spine.TrackEntry trackEntry, Spine.Event e) {
+			if (e.Data.Name.Equals("Ghosting", System.StringComparison.Ordinal)) {
+				ghostingEnabled = e.Int > 0;
+				if (e.Float > 0)
+					spawnInterval = e.Float;
+
+				if (!string.IsNullOrEmpty(e.String))
+					this.color = HexToColor(e.String);
+			}
+		}
+
+		//SkeletonAnimator
+		//SkeletonAnimator or Mecanim based animations only support toggling ghostingEnabled. Be sure not to set anything other than the Int param in Spine or String will take priority.
+		void Ghosting (float val) {
+			ghostingEnabled = val > 0;
+		}
+
+		void Update () {
+			if (!ghostingEnabled || poolIndex >= pool.Length)
+				return;
+
+			if (Time.time >= nextSpawnTime) {
+				GameObject go = pool[poolIndex].gameObject;
+
+				Material[] materials = meshRenderer.sharedMaterials;
+				for (int i = 0; i < materials.Length; i++) {
+					var originalMat = materials[i];
+					Material ghostMat;
+					if (!materialTable.ContainsKey(originalMat)) {
+						ghostMat = new Material(originalMat) {
+							shader = ghostShader,
+							color = Color.white
+						};
+
+						if (ghostMat.HasProperty("_TextureFade"))
+							ghostMat.SetFloat("_TextureFade", textureFade);
+
+						materialTable.Add(originalMat, ghostMat);
+					} else {
+						ghostMat = materialTable[originalMat];
+					}
+
+					materials[i] = ghostMat;
+				}
+
+				var goTransform = go.transform;
+				goTransform.parent = transform;
+
+				pool[poolIndex].Initialize(meshFilter.sharedMesh, materials, color, additive, fadeSpeed, meshRenderer.sortingLayerID, (sortWithDistanceOnly) ? meshRenderer.sortingOrder : meshRenderer.sortingOrder - 1);
+
+				goTransform.localPosition = new Vector3(0f, 0f, zOffset);
+				goTransform.localRotation = Quaternion.identity;
+				goTransform.localScale = Vector3.one;
+
+				goTransform.parent = null;
+
+				poolIndex++;
+
+				if (poolIndex == pool.Length)
+					poolIndex = 0;
+
+				nextSpawnTime = Time.time + spawnInterval;
+			}
+		}
+
+		void OnDestroy () {
+			if (pool != null) {
+				for (int i = 0; i < maximumGhosts; i++)
+					if (pool[i] != null) pool[i].Cleanup();
+			}
+
+			foreach (var mat in materialTable.Values)
+				Destroy(mat);
+		}
+
+		// based on UnifyWiki http://wiki.unity3d.com/index.php?title=HexConverter
+		static Color32 HexToColor (string hex) {
+			const System.Globalization.NumberStyles HexNumber = System.Globalization.NumberStyles.HexNumber;
+
+			if (hex.Length < 6)
+				return Color.magenta;
+
+			hex = hex.Replace("#", "");
+			byte r = byte.Parse(hex.Substring(0, 2), HexNumber);
+			byte g = byte.Parse(hex.Substring(2, 2), HexNumber);
+			byte b = byte.Parse(hex.Substring(4, 2), HexNumber);
+			byte a = 0xFF;
+			if (hex.Length == 8)
+				a = byte.Parse(hex.Substring(6, 2), HexNumber);
+
+			return new Color32(r, g, b, a);
+		}
+	}
+
+}

Assets/Spine Examples/Scripts/Sample Components/Ghost/SkeletonGhost.cs.meta

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Assets/Spine Examples/Scripts/Sample Components/Ghost/SkeletonGhostRenderer.cs

@@ -0,0 +1,128 @@
+/******************************************************************************
+ * Spine Runtimes License Agreement
+ * Last updated January 1, 2020. Replaces all prior versions.
+ *
+ * Copyright (c) 2013-2020, Esoteric Software LLC
+ *
+ * Integration of the Spine Runtimes into software or otherwise creating
+ * derivative works of the Spine Runtimes is permitted under the terms and
+ * conditions of Section 2 of the Spine Editor License Agreement:
+ * http://esotericsoftware.com/spine-editor-license
+ *
+ * Otherwise, it is permitted to integrate the Spine Runtimes into software
+ * or otherwise create derivative works of the Spine Runtimes (collectively,
+ * "Products"), provided that each user of the Products must obtain their own
+ * Spine Editor license and redistribution of the Products in any form must
+ * include this license and copyright notice.
+ *
+ * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
+ * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *****************************************************************************/
+
+// Contributed by: Mitch Thompson
+
+using System.Collections;
+using UnityEngine;
+
+namespace Spine.Unity.Examples {
+	public class SkeletonGhostRenderer : MonoBehaviour {
+		static readonly Color32 TransparentBlack = new Color32(0, 0, 0, 0);
+		const string colorPropertyName = "_Color";
+
+		float fadeSpeed = 10;
+		Color32 startColor;
+		MeshFilter meshFilter;
+		MeshRenderer meshRenderer;
+
+		MaterialPropertyBlock mpb;
+		int colorId;
+
+		void Awake () {
+			meshRenderer = gameObject.AddComponent<MeshRenderer>();
+			meshFilter = gameObject.AddComponent<MeshFilter>();
+
+			colorId = Shader.PropertyToID(colorPropertyName);
+			mpb = new MaterialPropertyBlock();
+		}
+
+		public void Initialize (Mesh mesh, Material[] materials, Color32 color, bool additive, float speed, int sortingLayerID, int sortingOrder) {
+			StopAllCoroutines();
+
+			gameObject.SetActive(true);
+			meshRenderer.sharedMaterials = materials;
+			meshRenderer.sortingLayerID = sortingLayerID;
+			meshRenderer.sortingOrder = sortingOrder;
+			meshFilter.sharedMesh = Instantiate(mesh);
+			startColor = color;
+			mpb.SetColor(colorId, color);
+			meshRenderer.SetPropertyBlock(mpb);
+
+			fadeSpeed = speed;
+
+			if (additive)
+				StartCoroutine(FadeAdditive());
+			else
+				StartCoroutine(Fade());
+		}
+
+		IEnumerator Fade () {
+			Color32 c = startColor;
+			Color32 black = SkeletonGhostRenderer.TransparentBlack;
+
+			float t = 1f;
+			for (float hardTimeLimit = 5f; hardTimeLimit > 0; hardTimeLimit -= Time.deltaTime) {
+				c = Color32.Lerp(black, startColor, t);
+				mpb.SetColor(colorId, c);
+				meshRenderer.SetPropertyBlock(mpb);
+
+				t = Mathf.Lerp(t, 0, Time.deltaTime * fadeSpeed);
+				if (t <= 0)
+					break;
+
+				yield return null;
+			}
+
+			Destroy(meshFilter.sharedMesh);
+			gameObject.SetActive(false);
+		}
+
+		IEnumerator FadeAdditive () {
+			Color32 c = startColor;
+			Color32 black = SkeletonGhostRenderer.TransparentBlack;
+
+			float t = 1f;
+
+			for (float hardTimeLimit = 5f; hardTimeLimit > 0; hardTimeLimit -= Time.deltaTime) {
+				c = Color32.Lerp(black, startColor, t);
+				mpb.SetColor(colorId, c);
+				meshRenderer.SetPropertyBlock(mpb);
+
+				t = Mathf.Lerp(t, 0, Time.deltaTime * fadeSpeed);
+				if (t <= 0)
+					break;
+
+				yield return null;
+			}
+
+			Destroy(meshFilter.sharedMesh);
+
+			gameObject.SetActive(false);
+		}
+
+		public void Cleanup () {
+			if (meshFilter != null && meshFilter.sharedMesh != null)
+				Destroy(meshFilter.sharedMesh);
+
+			Destroy(gameObject);
+		}
+	}
+
+}

Assets/Spine Examples/Scripts/Sample Components/Ghost/SkeletonGhostRenderer.cs.meta

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