mmorpg2d/Assets/Spine Examples/Scripts/Sample Components/Sample VertexEffects/JitterEffectExample.cs

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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.");
		}
	}

}