1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
using System;
using System.Collections.Generic;
using UnityEngine;
namespace MeshUtility
{
public static class BoneMeshEraser
{
private struct ExcludeBoneIndex
{
public readonly bool Bone0;
public readonly bool Bone1;
public readonly bool Bone2;
public readonly bool Bone3;
public ExcludeBoneIndex(bool bone0, bool bone1, bool bone2, bool bone3)
{
Bone0 = bone0;
Bone1 = bone1;
Bone2 = bone2;
Bone3 = bone3;
}
}
[Serializable]
public struct EraseBone
{
public Transform Bone;
public bool Erase;
public override string ToString()
{
return Bone.name + ":" + Erase;
}
}
static int ExcludeTriangles(int[] triangles, BoneWeight[] bws, int[] exclude)
{
int count = 0;
if (bws != null && bws.Length > 0)
{
for (int i = 0; i < triangles.Length; i += 3)
{
var a = triangles[i];
var b = triangles[i + 1];
var c = triangles[i + 2];
{
var bw = bws[a];
var eb = AreBoneContains(ref exclude, bw.boneIndex0, bw.boneIndex1, bw.boneIndex2, bw.boneIndex3);
if (bw.weight0 > 0 && eb.Bone0) continue;
if (bw.weight1 > 0 && eb.Bone1) continue;
if (bw.weight2 > 0 && eb.Bone2) continue;
if (bw.weight3 > 0 && eb.Bone3) continue;
}
{
var bw = bws[b];
var eb = AreBoneContains(ref exclude, bw.boneIndex0, bw.boneIndex1, bw.boneIndex2, bw.boneIndex3);
if (bw.weight0 > 0 && eb.Bone0) continue;
if (bw.weight1 > 0 && eb.Bone1) continue;
if (bw.weight2 > 0 && eb.Bone2) continue;
if (bw.weight3 > 0 && eb.Bone3) continue;
}
{
var bw = bws[c];
var eb = AreBoneContains(ref exclude, bw.boneIndex0, bw.boneIndex1, bw.boneIndex2, bw.boneIndex3);
if (bw.weight0 > 0 && eb.Bone0) continue;
if (bw.weight1 > 0 && eb.Bone1) continue;
if (bw.weight2 > 0 && eb.Bone2) continue;
if (bw.weight3 > 0 && eb.Bone3) continue;
}
triangles[count++] = a;
triangles[count++] = b;
triangles[count++] = c;
}
}
return count;
}
private static ExcludeBoneIndex AreBoneContains(ref int[] exclude, int boneIndex0, int boneIndex1,
int boneIndex2, int boneIndex3)
{
var b0 = false;
var b1 = false;
var b2 = false;
var b3 = false;
for (int i = 0; i < exclude.Length; i++)
{
if (exclude[i] == boneIndex0)
{
b0 = true;
continue;
}
if (exclude[i] == boneIndex1)
{
b1 = true;
continue;
}
if (exclude[i] == boneIndex2)
{
b2 = true;
continue;
}
if (exclude[i] == boneIndex3)
{
b3 = true;
}
}
return new ExcludeBoneIndex(b0, b1, b2, b3);
}
public static Mesh CreateErasedMesh(Mesh src, int[] eraseBoneIndices)
{
/*
Debug.LogFormat("{0} exclude: {1}",
src.name,
String.Join(", ", eraseBoneIndices.Select(x => x.ToString()).ToArray())
);
*/
var mesh = new Mesh();
mesh.name = src.name + "(erased)";
#if UNITY_2017_3_OR_NEWER
mesh.indexFormat = src.indexFormat;
#endif
mesh.vertices = src.vertices;
mesh.normals = src.normals;
mesh.uv = src.uv;
mesh.tangents = src.tangents;
mesh.boneWeights = src.boneWeights;
mesh.bindposes = src.bindposes;
mesh.subMeshCount = src.subMeshCount;
for (int i = 0; i < src.subMeshCount; ++i)
{
var indices = src.GetIndices(i);
var count = ExcludeTriangles(indices, mesh.boneWeights, eraseBoneIndices);
var dst = new int[count];
Array.Copy(indices, 0, dst, 0, count);
mesh.SetIndices(dst, MeshTopology.Triangles, i);
}
return mesh;
}
public static IEnumerable<Transform> Ancestor(this Transform t)
{
yield return t;
if (t.parent != null)
{
foreach (var x in Ancestor(t.parent))
{
yield return x;
}
}
}
}
}
|
