可参考：http://answers.unity3d.com/questions/1213025/separating-submeshes-into-unique-meshes.html
代码如下：
1 using UnityEditor;
2 using UnityEngine;
3 using System.Collections.Generic;
4
5 public class SubmeshSplitter
6 {
7 //http://answers.unity3d.com/questions/1213025/separating-submeshes-into-unique-meshes.html
8 [MenuItem("美术/Submesh Splitter", false, 7002)]
9 public static void BuildWindowsAssetBundle()
10 {
11 GameObject[] objects = Selection.gameObjects;
12 for (int i = 0; i < objects.Length; i++)
13 {
14 ProcessGameObject(objects[i]);
15 }
16 Debug.Log("Done splitting meshes into submeshes! " + System.DateTime.Now);
17 }
18
19 public class MeshFromSubmesh
20 {
21 public Mesh mesh;
22 public int id; // Represent the ID of the sub mesh from with the new 'mesh' has been created
23 }
24
25 private static void ProcessGameObject(GameObject go)
26 {
27 SkinnedMeshRenderer meshRendererComponent = go.GetComponent<SkinnedMeshRenderer>();
28 if (!meshRendererComponent)
29 {
30 Debug.LogError("MeshRenderer null for '" + go.name + "'!");
31 return;
32 }
33 Mesh mesh = go.GetComponent<SkinnedMeshRenderer>().sharedMesh;
34 if (!mesh)
35 {
36 Debug.LogError("Mesh null for '" + go.name + "'!");
37 return;
38 }
39 List<MeshFromSubmesh> meshFromSubmeshes = GetAllSubMeshAsIsolatedMeshes(mesh);
40 if (meshFromSubmeshes == null || meshFromSubmeshes.Count == 0)
41 {
42 Debug.LogError("List<MeshFromSubmesh> empty or null for '" + go.name + "'!");
43 return;
44 }
45 string goName = go.name;
46 for (int i = 0; i < meshFromSubmeshes.Count; i++)
47 {
48 string meshFromSubmeshName = goName + "_sub_" + i;
49 GameObject meshFromSubmeshGameObject = new GameObject();
50 meshFromSubmeshGameObject.name = meshFromSubmeshName;
51 meshFromSubmeshGameObject.transform.SetParent(meshRendererComponent.transform);
52 meshFromSubmeshGameObject.transform.localPosition = Vector3.zero;
53 meshFromSubmeshGameObject.transform.localRotation = Quaternion.identity;
54 SkinnedMeshRenderer meshFromSubmeshMeshRendererComponent = meshFromSubmeshGameObject.AddComponent<SkinnedMeshRenderer>();
55 meshFromSubmeshMeshRendererComponent.sharedMesh = meshFromSubmeshes[i].mesh;
56 // Don't forget to save the newly created mesh in the asset database (on disk)
57 var mehs_path = AssetDatabase.GetAssetPath(mesh);
58 string path = mehs_path + meshFromSubmeshName + ".asset";
59 AssetDatabase.CreateAsset(meshFromSubmeshes[i].mesh, path);
60 Debug.Log("Created: " + path);
61 if (meshRendererComponent != null)
62 {
63 // To use the same mesh renderer properties of the initial mesh
64 EditorUtility.CopySerialized(meshRendererComponent, meshFromSubmeshMeshRendererComponent);
65 // We just need the only one material used by the sub mesh in its renderer
66 Material material = meshFromSubmeshMeshRendererComponent.sharedMaterials[meshFromSubmeshes[i].id];
67 meshFromSubmeshMeshRendererComponent.sharedMaterials = new[] { material };
68 }
69 var newMesh = AssetDatabase.LoadAssetAtPath<Mesh>(path);
70 meshFromSubmeshMeshRendererComponent.sharedMesh = newMesh;
71 }
72 }
73
74 private static List<MeshFromSubmesh> GetAllSubMeshAsIsolatedMeshes(Mesh mesh)
75 {
76 List<MeshFromSubmesh> meshesToReturn = new List<MeshFromSubmesh>();
77 if (!mesh)
78 {
79 Debug.LogError("No mesh passed into GetAllSubMeshAsIsolatedMeshes!");
80 return meshesToReturn;
81 }
82 int submeshCount = mesh.subMeshCount;
83 if (submeshCount < 2)
84 {
85 Debug.LogError("Only " + submeshCount + " submeshes in mesh passed to GetAllSubMeshAsIsolatedMeshes");
86 return meshesToReturn;
87 }
88 MeshFromSubmesh m1;
89 for (int i = 0; i < submeshCount; i++)
90 {
91 m1 = new MeshFromSubmesh();
92 m1.id = i;
93 m1.mesh = mesh.GetSubmesh(i);
94 meshesToReturn.Add(m1);
95 }
96 return meshesToReturn;
97 }
98 }
99
100 public static class MeshExtension
101 {
102 private class Vertices
103 {
104 List<Vector3> verts = null;
105 List<Vector2> uv1 = null;
106 List<Vector2> uv2 = null;
107 List<Vector2> uv3 = null;
108 List<Vector2> uv4 = null;
109 List<Vector3> normals = null;
110 List<Vector4> tangents = null;
111 List<Color32> colors = null;
112 List<BoneWeight> boneWeights = null;
113 public List<Matrix4x4> bindposes = null;
114
115 public Vertices()
116 {
117 verts = new List<Vector3>();
118 }
119 public Vertices(Mesh aMesh)
120 {
121 verts = CreateList(aMesh.vertices);
122 uv1 = CreateList(aMesh.uv);
123 uv2 = CreateList(aMesh.uv2);
124 uv3 = CreateList(aMesh.uv3);
125 uv4 = CreateList(aMesh.uv4);
126 normals = CreateList(aMesh.normals);
127 tangents = CreateList(aMesh.tangents);
128 colors = CreateList(aMesh.colors32);
129 boneWeights = CreateList(aMesh.boneWeights);
130 bindposes = CreateList(aMesh.bindposes);
131 }
132
133 private List<T> CreateList<T>(T[] aSource)
134 {
135 if (aSource == null || aSource.Length == 0)
136 return null;
137 return new List<T>(aSource);
138 }
139 private void Copy<T>(ref List<T> aDest, List<T> aSource, int aIndex)
140 {
141 if (aSource == null)
142 return;
143 if (aDest == null)
144 aDest = new List<T>();
145 aDest.Add(aSource[aIndex]);
146 }
147 public int Add(Vertices aOther, int aIndex)
148 {
149 int i = verts.Count;
150 Copy(ref verts, aOther.verts, aIndex);
151 Copy(ref uv1, aOther.uv1, aIndex);
152 Copy(ref uv2, aOther.uv2, aIndex);
153 Copy(ref uv3, aOther.uv3, aIndex);
154 Copy(ref uv4, aOther.uv4, aIndex);
155 Copy(ref normals, aOther.normals, aIndex);
156 Copy(ref tangents, aOther.tangents, aIndex);
157 Copy(ref colors, aOther.colors, aIndex);
158 Copy(ref boneWeights, aOther.boneWeights, aIndex);
159 //Copy(ref bindposes, aOther.bindposes, aIndex);
160 return i;
161 }
162 public void AssignTo(Mesh aTarget)
163 {
164 aTarget.SetVertices(verts);
165 if (uv1 != null) aTarget.SetUVs(0, uv1);
166 if (uv2 != null) aTarget.SetUVs(1, uv2);
167 if (uv3 != null) aTarget.SetUVs(2, uv3);
168 if (uv4 != null) aTarget.SetUVs(3, uv4);
169 if (normals != null) aTarget.SetNormals(normals);
170 if (tangents != null) aTarget.SetTangents(tangents);
171 if (colors != null) aTarget.SetColors(colors);
172 if (boneWeights != null) aTarget.boneWeights = boneWeights.ToArray();
173 if (bindposes != null) aTarget.bindposes = bindposes.ToArray();
174 }
175 }
176
177 public static Mesh GetSubmesh(this Mesh aMesh, int aSubMeshIndex)
178 {
179 if (aSubMeshIndex < 0 || aSubMeshIndex >= aMesh.subMeshCount)
180 return null;
181 int[] indices = aMesh.GetTriangles(aSubMeshIndex);
182 Vertices source = new Vertices(aMesh);
183 Vertices dest = new Vertices();
184 Dictionary<int, int> map = new Dictionary<int, int>();
185 int[] newIndices = new int[indices.Length];
186 for (int i = 0; i < indices.Length; i++)
187 {
188 int o = indices[i];
189 int n;
190 if (!map.TryGetValue(o, out n))
191 {
192 n = dest.Add(source, o);
193 map.Add(o, n);
194 }
195 newIndices[i] = n;
196 }
197 dest.bindposes = source.bindposes;
198 Mesh m = new Mesh();
199 m.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
200 dest.AssignTo(m);
201 m.triangles = newIndices;
202 return m;
203 }
204 }
转载请注明出处：https://www.cnblogs.com/jietian331/p/17197314.html
标签：SkinMesh,List,int,Unity,mesh,aMesh,new,null,SubMesh From： https://www.cnblogs.com/jietian331/p/17197314.html