1 files changed, 127 insertions, 0 deletions
diff --git a/Assets/Scripts/Effects/CharacterGhostEffect.cs b/Assets/Scripts/Effects/CharacterGhostEffect.cs
new file mode 100644
index 00000000..d40adc17
--- /dev/null
+++ b/Assets/Scripts/Effects/CharacterGhostEffect.cs
@@ -0,0 +1,127 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class CharacterGhostEffect : EffectHandler
+{
+	[Tooltip("目标skinMeshRenderer")]
+	public SkinnedMeshRenderer m_Renderer;
+
+	[Tooltip("如果mesh包含多个submesh，需要每个submesh单独设置一个材质")]
+	public Material[] Materials;
+
+	[Tooltip("Submesh是否使用同一个材质")]
+	public bool SubmeshShareMaterial;
+
+	[Tooltip("使用范围内的submesh")]
+	public bool UseRangedSubmesh;
+
+	[Tooltip("Submesh索引范围")]
+	public Vector2Int SubmeshRange; 
+
+	[Tooltip("是否开启残影效果")]
+	public bool IsEnable;
+
+	[Tooltip("残影生成的时间间隔")]
+	public float Interval = 0.1f;
+
+	[Tooltip("残影的生存时间")]
+	public float LifeTime = 0.5f;
+
+	private float m_Time = 0;
+	private List<GhostSnapshot> m_Ghosts = new List<GhostSnapshot>();
+ 	
+	void Update()
+	{
+		//if (!IsEnable)
+		//{
+		//	if (m_Ghosts.Count > 0)
+		//		UpdateGhost(); // destroy ghosts
+		//	return;
+		//}
+
+		if (m_Ghosts == null || m_Renderer == null || Materials == null || Materials.Length == 0)
+		{
+			IsEnable = false;
+			return;
+		}
+
+		m_Time += Time.deltaTime;
+
+		//if(IsEnable)
+		//	CreateGhost();
+
+		UpdateGhost();
+		DrawGhost();
+	}
+
+	public void CreateGhost()
+	{
+		if(m_Time >= Interval)
+		{
+			m_Time -= Interval;
+
+			Mesh mesh = new Mesh();
+			m_Renderer.BakeMesh(mesh);
+
+			Matrix4x4 mat = m_Renderer.localToWorldMatrix;
+
+			m_Ghosts.Add(new GhostSnapshot(mesh, mat, Time.realtimeSinceStartup, LifeTime));
+		}
+	}
+
+	void UpdateGhost()
+	{
+		for(int i = m_Ghosts.Count - 1; i >= 0 ; --i)
+		{
+			GhostSnapshot ghost = m_Ghosts[i];
+			float passTime = Time.realtimeSinceStartup - ghost.startTime;
+
+			if (passTime > ghost.lifeTime)
+			{
+				m_Ghosts.Remove(ghost);
+				Destroy(ghost);
+				continue;
+			}
+		}
+	}
+
+	void DrawGhost()
+	{
+		for(int i = 0; i < m_Ghosts.Count; ++ i)
+		{
+			GhostSnapshot ghost = m_Ghosts[i];
+			int start = 0, end = ghost.mesh.subMeshCount - 1;
+			if(UseRangedSubmesh)
+			{
+				start = SubmeshRange.x;
+				end = SubmeshRange.y;
+			}
+			for (int j = start; j <= end; ++j)
+			{
+				Material material;
+				if (SubmeshShareMaterial)
+					material = Materials[0];
+				else
+					material = Materials[j];
+				Graphics.DrawMesh(ghost.mesh, ghost.matrix, material, gameObject.layer, null, j);
+			}
+		}
+	}
+}
+
+class GhostSnapshot : Object
+{
+	public Mesh mesh;
+	public Matrix4x4 matrix;
+	public float startTime;
+	public float lifeTime;
+
+	public GhostSnapshot(Mesh mesh, Matrix4x4 mat, float startTime, float lifeTime)
+	{
+		this.mesh = mesh;
+		this.matrix = mat;
+		this.startTime = startTime;
+		this.lifeTime = lifeTime;
+	}
+}