From 8e13e7e2874adc8982e16d1d2ed2e28d7480b45f Mon Sep 17 00:00:00 2001
From: chai <215380520@qq.com>
Date: Sun, 19 May 2024 16:05:58 +0800
Subject: +1.57

---
 .../NGS.MeshFusionPro/MeshCutterSimpleLW.cs        | 66 ++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 Thronefall_1_57/Decompile/NGS.MeshFusionPro/MeshCutterSimpleLW.cs

(limited to 'Thronefall_1_57/Decompile/NGS.MeshFusionPro/MeshCutterSimpleLW.cs')

diff --git a/Thronefall_1_57/Decompile/NGS.MeshFusionPro/MeshCutterSimpleLW.cs b/Thronefall_1_57/Decompile/NGS.MeshFusionPro/MeshCutterSimpleLW.cs
new file mode 100644
index 0000000..4a70c56
--- /dev/null
+++ b/Thronefall_1_57/Decompile/NGS.MeshFusionPro/MeshCutterSimpleLW.cs
@@ -0,0 +1,66 @@
+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;
+		}
+	}
+}
-- 
cgit v1.1-26-g67d0