Code

将以下脚本添加到一个带有Aniamtor Component的模型GameObject上，在Game视图按下"S"键，就可以看到模型给快照了一份出来

模型要有位移，何移动动画，这样就可以看到快照在原地的样子

using System.Text; using UnityEngine; public class TestingAnimatorAPI : MonoBehaviour { private MeshRenderer[] meshesRenderer; private SkinnedMeshRenderer[] skinnedMeshesRenderer; private Animator animator; // Start is called before the first frame update void Start() { PrintInfos(); meshesRenderer = transform.GetComponentsInChildren<MeshRenderer>(); skinnedMeshesRenderer = transform.GetComponentsInChildren<SkinnedMeshRenderer>(); } // Update is called once per frame void Update() { if (Input.GetKeyDown(KeyCode.S)) { SnapshotSkinnedMesh(); } } private int counter; private void Snapshot() { GameObject pGo = new GameObject($"SkinnedMeshSnapshot_{++counter}"); pGo.transform.position = gameObject.transform.position; pGo.transform.rotation = gameObject.transform.rotation; pGo.transform.localScale = gameObject.transform.localScale; // meshes if (meshesRenderer != null && meshesRenderer.Length > 0) { for (int i = 0; i < meshesRenderer.Length; i++) { var ownGo = meshesRenderer[i].gameObject; var ownGoMeshFilter = ownGo.GetComponent<MeshFilter>(); GameObject go = new GameObject(meshesRenderer[i].gameObject.name); go.transform.SetParent(pGo.transform); MeshFilter meshFilter = go.AddComponent<MeshFilter>(); MeshRenderer meshRenderer = go.AddComponent<MeshRenderer>(); #if UNITY_EDITOR //go.hideFlags = HideFlags.HideAndDontSave; // 调试时，想在hierarchy看到，就注释掉吧 #else go.hideFlags = HideFlags.HideAndDontSave; #endif meshRenderer.materials = meshesRenderer[i].materials; meshFilter.sharedMesh = ownGoMeshFilter.sharedMesh; go.transform.position = meshesRenderer[i].transform.position; go.transform.rotation = meshesRenderer[i].transform.rotation; go.transform.localScale = meshesRenderer[i].transform.localScale; } } // skinnedMeshes if (skinnedMeshesRenderer != null && skinnedMeshesRenderer.Length > 0) { for (int i = 0; i < skinnedMeshesRenderer.Length; i++) { Mesh mesh = new Mesh(); skinnedMeshesRenderer[i].BakeMesh(mesh); GameObject go = new GameObject(skinnedMeshesRenderer[i].gameObject.name); go.transform.SetParent(pGo.transform); MeshFilter meshFilter = go.AddComponent<MeshFilter>(); MeshRenderer meshRenderer = go.AddComponent<MeshRenderer>(); #if UNITY_EDITOR //go.hideFlags = HideFlags.HideAndDontSave; // 调试时，想在hierarchy看到，就注释掉吧 #else go.hideFlags = HideFlags.HideAndDontSave; #endif meshRenderer.materials = skinnedMeshesRenderer[i].materials; meshFilter.sharedMesh = mesh; go.transform.position = skinnedMeshesRenderer[i].transform.position; go.transform.rotation = skinnedMeshesRenderer[i].transform.rotation; go.transform.localScale = skinnedMeshesRenderer[i].transform.localScale; } } } }

Runtime

再Game视图下，按下"S"键，就可以看到Scene下的snapshot效果

总结

这个主要实现MeshRenderer的copy，还有SkinnedMeshRenderer的BakeMesh转到MeshRenderer

还可以优化

就是在Snapshot之后，可以将所有的Mesh，Material，合并到一个MeshRenderer/Filter来显示，效率更高，这里我就不写了

应用的场景

像下面的References中的，制作简单的运动模型的残影效果还有一些，起始出现，或消失时，带有蒙皮动画的，在该蒙皮播放到静止时，可以使用Bake到Mesh，再用MeshRenderer来显示，再合并现实，这样性能将有所提升

References

Unity-残影效果实现