From 55241d544b6ca7324f03a8680971c0c66903632b Mon Sep 17 00:00:00 2001
From: tongg <tongguibina@163.com>
Date: Sat, 1 Feb 2025 20:44:52 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20OBJ=E6=96=87=E4=BB=B6=E5=AF=BC=E5=87=BA?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Views/UserControl/Viewport3D.xaml.cs          |   6 +-
 .../ViewportData/Helper/ObjExporter.cs        | 116 ++++++++++++++++++
 2 files changed, 120 insertions(+), 2 deletions(-)
 create mode 100644 Views/UserControl/ViewportData/Helper/ObjExporter.cs

diff --git a/Views/UserControl/Viewport3D.xaml.cs b/Views/UserControl/Viewport3D.xaml.cs
index afdbbc8..e1effc6 100644
--- a/Views/UserControl/Viewport3D.xaml.cs
+++ b/Views/UserControl/Viewport3D.xaml.cs
@@ -17,6 +17,7 @@ using SharpDX.Direct3D11;
 using SharpDX.DXGI;
 using MathNet.Numerics;
 using System.Windows.Media;
+using ObjExporter = SparkClient.Views.UserControl.ViewportData.Helper.ObjExporter;
 
 
 namespace SparkClient.Views.UserControl;
@@ -46,7 +47,7 @@ public partial class Viewport3D
         ViewportManager.LoadModelByEntities(new List<Viewport3DTriangleEntity>());
         #if DEBUG
         #else
-        BtnShow3DView.Visibility = Visibility.Hidden;
+       // BtnShow3DView.Visibility = Visibility.Hidden;
         #endif
         
         //选项初始化 显示-后端-管理类 一致
@@ -218,7 +219,8 @@ public partial class Viewport3D
                 ViewportManager.DoubleClickSelect = !false;
                 break;
             case "BtnShow3DView":
-                UnityHelper.GenerateRender(ViewportManager.ViewportTriangle.First().TriangleCode, "123");
+                ObjExporter.ExportToObj2(ViewportManager.ViewportTriangle, @"D:\id03.obj");
+                //UnityHelper.GenerateRender(ViewportManager.ViewportTriangle.First().TriangleCode, "123");
                 break;
          
         }
diff --git a/Views/UserControl/ViewportData/Helper/ObjExporter.cs b/Views/UserControl/ViewportData/Helper/ObjExporter.cs
new file mode 100644
index 0000000..82417d2
--- /dev/null
+++ b/Views/UserControl/ViewportData/Helper/ObjExporter.cs
@@ -0,0 +1,116 @@
+using System.IO;
+using System.Text;
+using SharpDX;
+using SparkClient.Views.UserControl.ViewportData.Entity;
+using SparkClient.Views.UserControl.ViewportData.Enum;
+
+namespace SparkClient.Views.UserControl.ViewportData.Helper;
+
+public class ObjExporter
+{
+
+    public static void ExportToObj2(List<Viewport3DTriangleEntity> entities, string outputPath)
+    {
+        //分组
+        Dictionary<string, List<Viewport3DTriangleEntity>> feactList = entities
+            .Where(entity => entity.PlaneType != PlaneType.Girdle)
+            .GroupBy(entity => entity.PlaneCode)
+            .ToDictionary(group => group.Key, group => group.ToList());
+        //腰 单组
+        List<Viewport3DTriangleEntity> waistList = entities
+            .Where(entity => entity.PlaneType == PlaneType.Girdle)
+            .ToList();
+        
+        //同一个面只保留外边框(除了腰)
+        Dictionary<string, List<Vector3>> resultPoints = new Dictionary<string, List<Vector3>>();
+        
+        foreach (var dic in feactList)
+        {
+            List<Vector3> tempPoints = new List<Vector3>();
+            foreach (var entity in dic.Value)
+            {
+                tempPoints.Add(entity.Point1);
+                tempPoints.Add(entity.Point2);
+                tempPoints.Add(entity.Point3);
+            }
+            resultPoints.Add(dic.Key, ViewportHelperPro.VectorClockwiseSort(new HashSet<Vector3>(tempPoints).ToList()));
+        }
+        List<Vector3> selFaceVector = new List<Vector3>();
+        if (waistList.Count > 0)
+        {
+            foreach (var entity in waistList)
+            {
+                selFaceVector.Add(entity.Point1);
+                selFaceVector.Add(entity.Point2);
+                selFaceVector.Add(entity.Point3);
+            }
+        }
+        resultPoints.Add("yao", selFaceVector);
+        
+        
+        StringBuilder sb = new StringBuilder();
+
+        // 顶点列表
+        List<Vector3> uniqueVertices = new List<Vector3>();
+        Dictionary<Vector3, int> vertexIndexMap = new Dictionary<Vector3, int>();
+
+        // 1. 对每个面生成顶点和面
+        foreach (var face in resultPoints)
+        {
+            // 对每个面，获取它的顶点列表
+            List<Vector3> faceVertices = face.Value;
+
+            // 去重顶点
+            foreach (var vertex in faceVertices)
+            {
+                if (!vertexIndexMap.ContainsKey(vertex))
+                {
+                    vertexIndexMap[vertex] = uniqueVertices.Count;
+                    uniqueVertices.Add(vertex);
+                }
+            }
+        }
+
+        // 2. 写入顶点数据
+        foreach (var vertex in uniqueVertices)
+        {
+            sb.AppendLine($"v {vertex.X} {vertex.Y} {vertex.Z}");
+        }
+
+        // 3. 写入每个面（f行）
+        foreach (var face in resultPoints)
+        {
+            sb.AppendLine($"# Face: {face.Key}");
+
+            // 获取面上的所有顶点并排序
+            List<Vector3> faceVertices = face.Value;
+            // Vector3 center = GetCenterOfVertices(faceVertices);
+            // faceVertices.Sort((v1, v2) => v1.AngleWithCenter(center).CompareTo(v2.AngleWithCenter(center)));
+            // center
+            // 输出面
+            sb.Append("f");
+            foreach (var vertex in faceVertices)
+            {
+                // 获取顶点的索引，OBJ格式从1开始
+                sb.Append($" {vertexIndexMap[vertex] + 1}");
+            }
+            sb.AppendLine();
+        }
+
+        // 4. 写入文件
+        File.WriteAllText(outputPath, sb.ToString());
+    }
+    
+    // 计算一组顶点的中心点（用于排序）
+    private static Vector3 GetCenterOfVertices(List<Vector3> vertices)
+    {
+        float centerX = 0, centerY = 0, centerZ = 0;
+        foreach (var vertex in vertices)
+        {
+            centerX += vertex.X;
+            centerY += vertex.Y;
+            centerZ += vertex.Z;
+        }
+        return new Vector3(centerX / vertices.Count, centerY / vertices.Count, centerZ / vertices.Count);
+    }
+}
\ No newline at end of file