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unity/Assets/Spine Examples/Scripts/Sample Components/Sample VertexEffects/JitterEffectExample.cs

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+/******************************************************************************
+ * 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
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+ * 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
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+
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Spine.Unity.Examples {
+
+	// This is a sample component for C# vertex effects for Spine rendering components.
+	// Using shaders and materials to control vertex properties is still more performant
+	// than using this API, but in cases where your vertex effect logic cannot be
+	// expressed as shader code, these vertex effects can be useful.
+	public class JitterEffectExample : MonoBehaviour {
+
+		[Range(0f, 0.8f)]
+		public float jitterMagnitude = 0.2f;
+
+		SkeletonRenderer skeletonRenderer;
+
+		void OnEnable () {
+			skeletonRenderer = GetComponent<SkeletonRenderer>();
+			if (skeletonRenderer == null) return;
+
+			// Use the OnPostProcessVertices callback to modify the vertices at the correct time.
+			skeletonRenderer.OnPostProcessVertices -= ProcessVertices;
+			skeletonRenderer.OnPostProcessVertices += ProcessVertices;
+
+			Debug.Log("Jitter Effect Enabled.");
+		}
+
+		void ProcessVertices (MeshGeneratorBuffers buffers) {
+			if (!this.enabled) return;
+
+			// For efficiency, limit your effect to the actual mesh vertex count using vertexCount
+			int vertexCount = buffers.vertexCount;
+
+			// Modify vertex positions by accessing Vector3[] vertexBuffer
+			var vertices = buffers.vertexBuffer;
+			for (int i = 0; i < vertexCount; i++)
+				vertices[i] += (Vector3)(Random.insideUnitCircle * jitterMagnitude);
+
+			// You can also modify uvs and colors.
+			//var uvs = buffers.uvBuffer;
+			//var colors = buffers.colorBuffer;
+
+			//
+		}
+
+		void OnDisable () {
+			if (skeletonRenderer == null) return;
+			skeletonRenderer.OnPostProcessVertices -= ProcessVertices;
+
+			Debug.Log("Jitter Effect Disabled.");
+		}
+	}
+
+}