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Assets/Spine Examples/Scripts/Sample Components/SkeletonRenderTexture/RenderQuadShader.shader

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+// Simple shader for e.g. a Quad that renders a RenderTexture.
+// Texture color is multiplied by a color property, mostly for alpha fadeout.
+Shader "Spine/RenderQuad" {
+	Properties{
+		_Color("Color", Color) = (1,1,1,1)
+		[NoScaleOffset] _MainTex("MainTex", 2D) = "white" {}
+		_Cutoff("Shadow alpha cutoff", Range(0,1)) = 0.1
+		[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" = "True" "RenderType" = "Transparent" "PreviewType" = "Plane" }
+		Blend One OneMinusSrcAlpha
+		Cull Off
+		ZWrite Off
+		Lighting Off
+
+		Stencil {
+			Ref[_StencilRef]
+			Comp[_StencilComp]
+			Pass Keep
+		}
+
+		Pass {
+			Name "Normal"
+
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			#include "UnityCG.cginc"
+			sampler2D _MainTex;
+			float4 _Color;
+
+			struct VertexInput {
+				float4 vertex : POSITION;
+				float2 uv : TEXCOORD0;
+				float4 vertexColor : COLOR;
+			};
+
+			struct VertexOutput {
+				float4 pos : SV_POSITION;
+				float2 uv : TEXCOORD0;
+				float4 vertexColor : COLOR;
+			};
+
+			VertexOutput vert(VertexInput v) {
+				VertexOutput o = (VertexOutput)0;
+				o.uv = v.uv;
+				o.vertexColor = v.vertexColor;
+				o.pos = UnityObjectToClipPos(v.vertex);
+				return o;
+			}
+
+			float4 frag(VertexOutput i) : SV_Target {
+				float4 texColor = tex2D(_MainTex,i.uv);
+				_Color.rgb *= _Color.a;
+				return texColor * _Color;
+			}
+			ENDCG
+		}
+
+		Pass {
+			Name "Caster"
+			Tags { "LightMode" = "ShadowCaster" }
+			Offset 1, 1
+			ZWrite On
+			ZTest LEqual
+
+			Fog { Mode Off }
+			Cull Off
+			Lighting Off
+
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			#pragma multi_compile_shadowcaster
+			#pragma fragmentoption ARB_precision_hint_fastest
+			#include "UnityCG.cginc"
+			sampler2D _MainTex;
+			fixed _Cutoff;
+
+			struct VertexOutput {
+				V2F_SHADOW_CASTER;
+				float4 uvAndAlpha : TEXCOORD1;
+			};
+
+			VertexOutput vert(appdata_base v, float4 vertexColor : COLOR) {
+				VertexOutput o;
+				o.uvAndAlpha = v.texcoord;
+				o.uvAndAlpha.a = vertexColor.a;
+				TRANSFER_SHADOW_CASTER(o)
+				return o;
+			}
+
+			float4 frag(VertexOutput i) : SV_Target {
+				fixed4 texcol = tex2D(_MainTex, i.uvAndAlpha.xy);
+				clip(texcol.a* i.uvAndAlpha.a - _Cutoff);
+				SHADOW_CASTER_FRAGMENT(i)
+			}
+			ENDCG
+		}
+	}
+	FallBack "Diffuse"
+}

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Assets/Spine Examples/Scripts/Sample Components/SkeletonRenderTexture/SkeletonRenderTexture.cs

@@ -0,0 +1,248 @@
+/******************************************************************************
+ * Spine Runtimes License Agreement
+ * Last updated January 1, 2020. Replaces all prior versions.
+ *
+ * Copyright (c) 2013-2022, 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.
+ *****************************************************************************/
+
+#if UNITY_2019_3_OR_NEWER
+#define HAS_FORCE_RENDER_OFF
+#endif
+
+#if UNITY_2017_2_OR_NEWER
+#define HAS_VECTOR_INT
+#endif
+
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Rendering;
+
+namespace Spine.Unity.Examples {
+
+	/// <summary>
+	/// When enabled, this component renders a skeleton to a RenderTexture and
+	/// then draws this RenderTexture at a quad of the same size.
+	/// This allows changing transparency at a single quad, which produces a more
+	/// natural fadeout effect.
+	/// Note: It is recommended to keep this component disabled as much as possible
+	/// because of the additional rendering overhead. Only enable it when alpha blending is required.
+	/// </summary>
+	[RequireComponent(typeof(SkeletonRenderer))]
+	public class SkeletonRenderTexture : MonoBehaviour {
+#if HAS_VECTOR_INT
+		public Color color = Color.white;
+		public Material quadMaterial;
+		public Camera targetCamera;
+		public int maxRenderTextureSize = 1024;
+		protected SkeletonRenderer skeletonRenderer;
+		protected MeshRenderer meshRenderer;
+		protected MeshFilter meshFilter;
+		public GameObject quad;
+		protected MeshRenderer quadMeshRenderer;
+		protected MeshFilter quadMeshFilter;
+		protected Mesh quadMesh;
+		public RenderTexture renderTexture;
+
+		private CommandBuffer commandBuffer;
+		private MaterialPropertyBlock propertyBlock;
+		private readonly List<Material> materials = new List<Material>();
+
+		protected Vector2Int requiredRenderTextureSize;
+		protected Vector2Int allocatedRenderTextureSize;
+
+		void Awake () {
+			meshRenderer = this.GetComponent<MeshRenderer>();
+			meshFilter = this.GetComponent<MeshFilter>();
+			skeletonRenderer = this.GetComponent<SkeletonRenderer>();
+			if (targetCamera == null)
+				targetCamera = Camera.main;
+
+			commandBuffer = new CommandBuffer();
+			propertyBlock = new MaterialPropertyBlock();
+
+			CreateQuadChild();
+		}
+
+		void OnDestroy () {
+			if (renderTexture)
+				RenderTexture.ReleaseTemporary(renderTexture);
+		}
+
+		void CreateQuadChild () {
+			quad = new GameObject(this.name + " RenderTexture", typeof(MeshRenderer), typeof(MeshFilter));
+			quad.transform.SetParent(this.transform.parent, false);
+			quadMeshRenderer = quad.GetComponent<MeshRenderer>();
+			quadMeshFilter = quad.GetComponent<MeshFilter>();
+
+			quadMesh = new Mesh();
+			quadMesh.MarkDynamic();
+			quadMesh.name = "RenderTexture Quad";
+			quadMesh.hideFlags = HideFlags.DontSaveInBuild | HideFlags.DontSaveInEditor;
+
+			if (quadMaterial != null)
+				quadMeshRenderer.material = new Material(quadMaterial);
+			else
+				quadMeshRenderer.material = new Material(Shader.Find("Spine/RenderQuad"));
+		}
+
+		void OnEnable () {
+			skeletonRenderer.OnMeshAndMaterialsUpdated += RenderOntoQuad;
+#if HAS_FORCE_RENDER_OFF
+			meshRenderer.forceRenderingOff = true;
+#else
+			Debug.LogError("This component requires Unity 2019.3 or newer for meshRenderer.forceRenderingOff. " +
+				"Otherwise you will see the mesh rendered twice.");
+#endif
+			if (quadMeshRenderer)
+				quadMeshRenderer.gameObject.SetActive(true);
+		}
+
+		void OnDisable () {
+			skeletonRenderer.OnMeshAndMaterialsUpdated -= RenderOntoQuad;
+#if HAS_FORCE_RENDER_OFF
+			meshRenderer.forceRenderingOff = false;
+#endif
+			if (quadMeshRenderer)
+				quadMeshRenderer.gameObject.SetActive(false);
+			if (renderTexture)
+				RenderTexture.ReleaseTemporary(renderTexture);
+			allocatedRenderTextureSize = Vector2Int.zero;
+		}
+
+		void RenderOntoQuad (SkeletonRenderer skeletonRenderer) {
+			PrepareForMesh();
+			RenderToRenderTexture();
+			AssignAtQuad();
+		}
+
+		protected void PrepareForMesh () {
+			Bounds boundsLocalSpace = meshFilter.sharedMesh.bounds;
+			Vector3 meshMinWorldSpace = transform.TransformPoint(boundsLocalSpace.min);
+			Vector3 meshMaxWorldSpace = transform.TransformPoint(boundsLocalSpace.max);
+			Vector3 meshMinXMaxYWorldSpace = new Vector3(meshMinWorldSpace.x, meshMaxWorldSpace.y);
+			Vector3 meshMaxXMinYWorldSpace = new Vector3(meshMaxWorldSpace.x, meshMinWorldSpace.y);
+
+			// We need to get the min/max of all four corners, close position and rotation of the skeleton
+			// in combination with perspective projection otherwise might lead to incorrect screen space min/max.
+			Vector3 meshMinProjected = targetCamera.WorldToScreenPoint(meshMinWorldSpace);
+			Vector3 meshMaxProjected = targetCamera.WorldToScreenPoint(meshMaxWorldSpace);
+			Vector3 meshMinXMaxYProjected = targetCamera.WorldToScreenPoint(meshMinXMaxYWorldSpace);
+			Vector3 meshMaxXMinYProjected = targetCamera.WorldToScreenPoint(meshMaxXMinYWorldSpace);
+			// To handle 180 degree rotation and thus min/max inversion, we get min/max of all four corners
+			Vector3 meshMinScreenSpace =
+				Vector3.Min(meshMinProjected, Vector3.Min(meshMaxProjected,
+				Vector3.Min(meshMinXMaxYProjected, meshMaxXMinYProjected)));
+			Vector3 meshMaxScreenSpace =
+				Vector3.Max(meshMinProjected, Vector3.Max(meshMaxProjected,
+				Vector3.Max(meshMinXMaxYProjected, meshMaxXMinYProjected)));
+
+			requiredRenderTextureSize = new Vector2Int(
+				Mathf.Min(maxRenderTextureSize, Mathf.CeilToInt(Mathf.Abs(meshMaxScreenSpace.x - meshMinScreenSpace.x))),
+				Mathf.Min(maxRenderTextureSize, Mathf.CeilToInt(Mathf.Abs(meshMaxScreenSpace.y - meshMinScreenSpace.y))));
+
+			PrepareRenderTexture();
+			PrepareCommandBuffer(meshMinWorldSpace, meshMaxWorldSpace);
+		}
+
+		protected void PrepareCommandBuffer (Vector3 meshMinWorldSpace, Vector3 meshMaxWorldSpace) {
+			commandBuffer.Clear();
+			commandBuffer.SetRenderTarget(renderTexture);
+			commandBuffer.ClearRenderTarget(true, true, Color.clear);
+
+			Matrix4x4 projectionMatrix = Matrix4x4.Ortho(
+				meshMinWorldSpace.x, meshMaxWorldSpace.x,
+				meshMinWorldSpace.y, meshMaxWorldSpace.y,
+				float.MinValue, float.MaxValue);
+
+			commandBuffer.SetProjectionMatrix(projectionMatrix);
+			commandBuffer.SetViewport(new Rect(Vector2.zero, requiredRenderTextureSize));
+		}
+
+		protected void RenderToRenderTexture () {
+			meshRenderer.GetPropertyBlock(propertyBlock);
+			meshRenderer.GetSharedMaterials(materials);
+
+			for (int i = 0; i < materials.Count; i++)
+				commandBuffer.DrawMesh(meshFilter.sharedMesh, transform.localToWorldMatrix,
+					materials[i], meshRenderer.subMeshStartIndex + i, -1, propertyBlock);
+			Graphics.ExecuteCommandBuffer(commandBuffer);
+		}
+
+		protected void AssignAtQuad () {
+			Vector2 min = meshFilter.sharedMesh.bounds.min;
+			Vector2 max = meshFilter.sharedMesh.bounds.max;
+
+			Vector3[] vertices = new Vector3[4] {
+				new Vector3(min.x, min.y, 0),
+				new Vector3(max.x, min.y, 0),
+				new Vector3(min.x, max.y, 0),
+				new Vector3(max.x, max.y, 0)
+			};
+			quadMesh.vertices = vertices;
+
+			int[] indices = new int[6] { 0, 2, 1, 2, 3, 1 };
+			quadMesh.triangles = indices;
+
+			Vector3[] normals = new Vector3[4] {
+				-Vector3.forward,
+				-Vector3.forward,
+				-Vector3.forward,
+				-Vector3.forward
+			};
+			quadMesh.normals = normals;
+
+			float maxU = (float)(requiredRenderTextureSize.x) / allocatedRenderTextureSize.x;
+			float maxV = (float)(requiredRenderTextureSize.y) / allocatedRenderTextureSize.y;
+			Vector2[] uv = new Vector2[4] {
+				new Vector2(0, 0),
+				new Vector2(maxU, 0),
+				new Vector2(0, maxV),
+				new Vector2(maxU, maxV)
+			};
+			quadMesh.uv = uv;
+			quadMeshFilter.mesh = quadMesh;
+			quadMeshRenderer.sharedMaterial.mainTexture = this.renderTexture;
+			quadMeshRenderer.sharedMaterial.color = color;
+
+			quadMeshRenderer.transform.position = this.transform.position;
+			quadMeshRenderer.transform.rotation = this.transform.rotation;
+			quadMeshRenderer.transform.localScale = this.transform.localScale;
+		}
+
+		protected void PrepareRenderTexture () {
+			Vector2Int textureSize = new Vector2Int(
+				Mathf.NextPowerOfTwo(requiredRenderTextureSize.x),
+				Mathf.NextPowerOfTwo(requiredRenderTextureSize.y));
+
+			if (textureSize != allocatedRenderTextureSize) {
+				if (renderTexture)
+					RenderTexture.ReleaseTemporary(renderTexture);
+				renderTexture = RenderTexture.GetTemporary(textureSize.x, textureSize.y);
+				allocatedRenderTextureSize = textureSize;
+			}
+		}
+#endif
+	}
+}

Assets/Spine Examples/Scripts/Sample Components/SkeletonRenderTexture/SkeletonRenderTexture.cs.meta

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Assets/Spine Examples/Scripts/Sample Components/SkeletonRenderTexture/SkeletonRenderTextureFadeout.cs

@@ -0,0 +1,88 @@
+/******************************************************************************
+ * Spine Runtimes License Agreement
+ * Last updated January 1, 2020. Replaces all prior versions.
+ *
+ * Copyright (c) 2013-2022, 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.
+ *****************************************************************************/
+
+#if UNITY_2019_3_OR_NEWER
+#define HAS_FORCE_RENDER_OFF
+#endif
+
+#if UNITY_2017_2_OR_NEWER
+#define HAS_VECTOR_INT
+#endif
+
+using UnityEngine;
+
+namespace Spine.Unity.Examples {
+
+	/// <summary>
+	/// A simple fadeout component that uses a <see cref="SkeletonRenderTexture"/> for transparency fadeout.
+	/// Attach a <see cref="SkeletonRenderTexture"/> and this component to a skeleton GameObject and disable both
+	/// components initially and keep them disabled during normal gameplay. When you need to start fadeout,
+	/// enable this component.
+	/// At the end of the fadeout, the event delegate <c>OnFadeoutComplete</c> is called, to which you can bind e.g.
+	/// a method that disables or destroys the entire GameObject.
+	/// </summary>
+	[RequireComponent(typeof(SkeletonRenderTexture))]
+	public class SkeletonRenderTextureFadeout : MonoBehaviour {
+		SkeletonRenderTexture skeletonRenderTexture;
+
+		public float fadeoutSeconds = 2.0f;
+		protected float fadeoutSecondsRemaining;
+
+		public delegate void FadeoutCallback (SkeletonRenderTextureFadeout skeleton);
+		public event FadeoutCallback OnFadeoutComplete;
+
+		protected void Awake () {
+			skeletonRenderTexture = this.GetComponent<SkeletonRenderTexture>();
+		}
+
+		protected void OnEnable () {
+			fadeoutSecondsRemaining = fadeoutSeconds;
+			skeletonRenderTexture.enabled = true;
+		}
+
+		protected void Update () {
+			if (fadeoutSecondsRemaining == 0)
+				return;
+
+			fadeoutSecondsRemaining -= Time.deltaTime;
+			if (fadeoutSecondsRemaining <= 0) {
+				fadeoutSecondsRemaining = 0;
+				if (OnFadeoutComplete != null)
+					OnFadeoutComplete(this);
+				return;
+			}
+			float fadeoutAlpha = fadeoutSecondsRemaining / fadeoutSeconds;
+#if HAS_VECTOR_INT
+			skeletonRenderTexture.color.a = fadeoutAlpha;
+#else
+			Debug.LogError("The SkeletonRenderTexture component requires Unity 2017.2 or newer.");
+#endif
+		}
+	}
+}

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