blob: 4a70c566c6f2437d1f76b4f0373f5063402cda49 (
plain)
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
|
using System;
using System.Collections.Generic;
using System.Linq;
using Unity.Collections;
using UnityEngine;
namespace NGS.MeshFusionPro;
public class MeshCutterSimpleLW : IMeshCutter
{
private static List<int> _triangles;
static MeshCutterSimpleLW()
{
_triangles = new List<int>();
}
public void Cut(Mesh mesh, MeshCuttingInfo info)
{
Cut(mesh, new MeshCuttingInfo[1] { info });
}
public void Cut(Mesh mesh, IList<MeshCuttingInfo> infos)
{
ValidateMeshOrThrowException(mesh);
mesh.GetTriangles(_triangles, 0);
using (Mesh.MeshDataArray meshDataArray = Mesh.AcquireReadOnlyMeshData(mesh))
{
NativeArray<LightweightVertex> other = meshDataArray[0].GetVertexData<LightweightVertex>();
NativeList<LightweightVertex> nativeList = new NativeList<LightweightVertex>(Allocator.Temp);
nativeList.CopyFrom(in other);
foreach (MeshCuttingInfo item in infos.OrderByDescending((MeshCuttingInfo i) => i.triangleStart))
{
nativeList.RemoveRange(item.vertexStart, item.vertexCount);
_triangles.RemoveRange(item.triangleStart, item.triangleCount);
OffsetTriangles(item);
}
mesh.SetTriangles(_triangles, 0);
mesh.SetVertexBufferData<LightweightVertex>(nativeList, 0, 0, nativeList.Length);
}
_triangles.Clear();
}
private void ValidateMeshOrThrowException(Mesh mesh)
{
if (mesh == null)
{
throw new ArgumentNullException("mesh");
}
if (mesh.subMeshCount > 1)
{
throw new ArgumentException("SimpleMeshCutter::'mesh' should has only 1 submesh");
}
}
private void OffsetTriangles(MeshCuttingInfo info)
{
int vertexCount = info.vertexCount;
int triangleStart = info.triangleStart;
int count = _triangles.Count;
for (int i = triangleStart; i < count; i++)
{
_triangles[i] -= vertexCount;
}
}
}
|
