Unity3d 残影效果（狂拽炫酷叼炸天）

效果图，真的很叼啊

我根据别人的改进了一版，支持MeshFilter上的Mesh（需要确保Mesh的Read/Write是开启的否则不能正常工作）

非常感谢原作者给提供思路。http://blog.csdn.net/langresser_king/article/details/50976029

代码

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

//残影特效，支持Mesh和SkinedMesh以及他俩组合
public class GhostEffect : MonoBehaviour
{
	//如果让Mesh也带残影请保证Mesh的Read/Write是开启的
	public bool IncludeMeshFilter = true;

	//残影
	public class GhostImange
	{
		public Mesh mesh;
		public Material material;
		public Matrix4x4 matrix;
		public float duration;
		public float time;
	}

	//材质
	public Material EffectMaterial;

	//总时长
	public float Duration = 5;

	//产生残影的间隔
	public float Interval = 0.2f;

	//残影淡出时间
	public float FadeoutTime = 1;

	private float mTime = 5;
	private List<GhostImange> mImageList = new List<GhostImange>();

	void Start()
	{

	}

	[ContextMenu("Play")]
	public void Play()
	{
		mTime = Duration;
		StartCoroutine(AddImage());
	}

	IEnumerator AddImage()
	{
		while (mTime > 0)
		{
			CreateImage();
			yield return new WaitForSeconds(Interval);
			mTime -= Interval;
		}
	}

	void CreateImage()
	{
		SkinnedMeshRenderer[] skinRenderers = GetComponentsInChildren<SkinnedMeshRenderer>();
		MeshFilter[] filters = null;

		int filtersCount = 0;

		if (IncludeMeshFilter)
		{
			filters = GetComponentsInChildren<MeshFilter>();
			filtersCount = filters.Length;
		}

		if (skinRenderers.Length+filtersCount <= 0)
		{
			return;
		}

		CombineInstance[] combineInstances = new CombineInstance[skinRenderers.Length + filtersCount];

		int idx = 0;
		for (int i = 0; i < skinRenderers.Length; i++)
		{
			var render = skinRenderers[i];

			var mesh = new Mesh();
			render.BakeMesh(mesh);

			combineInstances[idx] = new CombineInstance
			{
				mesh = mesh,
				transform = render.gameObject.transform.localToWorldMatrix,
				subMeshIndex = 0
			};

			idx++;
		}

		for (int i = 0; i < filtersCount; i++)
		{
			var render = filters[i];

			var temp = (null != render.sharedMesh) ? render.sharedMesh : render.mesh;
			var mesh = (Mesh)Object.Instantiate(temp);
			combineInstances[idx] = new CombineInstance
			{
				mesh = mesh,
				transform = render.gameObject.transform.localToWorldMatrix,
				subMeshIndex = 0
			};

			idx++;
		}

		Mesh combinedMesh = new Mesh();
		combinedMesh.CombineMeshes(combineInstances, true, true);

		mImageList.Add(new GhostImange
		{
			mesh = combinedMesh,
			material = new Material(EffectMaterial),
			time = FadeoutTime,
			duration = FadeoutTime,
		});
	}

	void LateUpdate()
	{

		bool needRemove = false;

		foreach (var image in mImageList)
		{
			image.time -= Time.deltaTime;
			if (image.material.HasProperty("_Color"))
			{
				Color color = Color.white;
				color.a = Mathf.Max(0, image.time / image.duration);
				image.material.SetColor("_Color", color);
			}

			Graphics.DrawMesh(image.mesh, Matrix4x4.identity, image.material, gameObject.layer);
			if(image.time<=0)
			{
				needRemove = true;
			}
		}

		if (needRemove)
		{
			mImageList.RemoveAll(x => x.time <= 0);
		}
	}

}