fix: 修复STL导出

ViewModel/Grading/GradingResultVM.cs

@@ -596,20 +596,21 @@ public class GradingResultVM : BaseViewModel
                 exportDialog.setValue("Excel File(2/4)");
             });
             ExcelFile(filePath);
-
             exportDialog.Dispatcher.Invoke(() =>
             {
-                exportDialog.setValue("DAT File(3/4)");
+                exportDialog.setValue("STL File(3/4)");
             });
+            await Task.Delay(100);
+            STLFile(filePath);
             
-            await DatFile(filePath);
-
             exportDialog.Dispatcher.Invoke(() =>
             {
-                exportDialog.setValue("STL File(4/4)");
+                exportDialog.setValue("DAT File(4/4)");
             });
-            await Task.Delay(100);
+            
-            STLFile(filePath);
+            await DatFile(filePath);
+
+           
             exportDialog.Dispatcher.Invoke(() =>
             {
                 exportDialog.setValue("Success");
@@ -864,10 +865,10 @@ public class GradingResultVM : BaseViewModel
         //File.Create(filePath + ".dat").Close();
         await ViewportData.SaveAsToVedioFile(filePath + ".mp4");
     }
-    private void STLFile(string filePath)
+    private async Task STLFile(string filePath)
     {
         //File.Create(filePath + ".stl").Close();
-         ViewportData.SaveAsToStlFile(filePath + ".stl");
+        await ViewportData.SaveAsToStlFile(filePath + ".stl");
     } 
     private void DataConver(string filePath)
     {

Views/UserControl/ViewportData/Helper/VideoHelper.cs

@@ -130,9 +130,9 @@ public class VideoHelper
                 }
             }
 
-            var dicName = Path.GetDirectoryName(outputPath);
+            // var dicName = Path.GetDirectoryName(outputPath);
-            var fileName = Path.GetFileNameWithoutExtension(outputPath);
+            // var fileName = Path.GetFileNameWithoutExtension(outputPath);
-            Microsoft.VisualBasic.FileIO.FileSystem.RenameFile(outputPath, fileName + ".dat");
+            // Microsoft.VisualBasic.FileIO.FileSystem.RenameFile(outputPath, fileName + ".dat");
         }
         finally
         {
@@ -185,7 +185,7 @@ public class VideoHelper
             // 使用 Dispatcher.Invoke 来确保 UI 操作在主线程中执行
             var encoder = Application.Current.Dispatcher.Invoke(() => CutPng(viewport));
             result.Add(encoder);
-            Thread.Sleep(50); // 模拟处理过程
+            Thread.Sleep(25); // 模拟处理过程
         }
 
         return result;
@@ -206,7 +206,7 @@ public class VideoHelper
             ViewportHelperPro.RotateModel(new Vector3D(0,-1,0));
            
         });
-        await Task.Delay(5000);
+        await Task.Delay(7000);
         await Application.Current.Dispatcher.InvokeAsync(() =>
         {
             ViewportHelperPro.RotateModel(new Vector3D(-1, 0, 0));

Views/UserControl/ViewportData/Helper/ViewportHelperPro.cs

@@ -1,5 +1,6 @@
 using System.Collections.Frozen;
 using System.Collections.ObjectModel;
+using System.Diagnostics;
 using System.Drawing.Text;
 using System.IO;
 using System.Windows;
@@ -7,6 +8,7 @@ using System.Windows.Media;
 using System.Windows.Media.Animation;
 using System.Windows.Media.Imaging;
 using System.Windows.Media.Media3D;
+using System.Windows.Threading;
 using HelixToolkit.Wpf.SharpDX;
 using SharpDX;
 using SharpDX.Direct3D11;
@@ -192,6 +194,7 @@ public class ViewportHelperPro
             writer.WriteLine("solid exportedModel");
             foreach (var model in viewport.Items.OfType<MeshGeometryModel3D>())
             {
+               
                 if (model.Geometry is HelixToolkit.Wpf.SharpDX.Geometry3D geometry)
                 {
                     var positions = geometry.Positions;
@@ -227,7 +230,73 @@ public class ViewportHelperPro
             writer.WriteLine("endsolid exportedModel");
         }
     }
-    
+    /// <summary>
+    /// 导出模型
+    /// </summary>
+    /// <param name="viewport"></param>
+    /// <param name="filePath"></param>
+    public static async Task ExportModelsToStlASync( string filePath)
+    {
+        Viewport3DX viewport = ViewportManager.GetViewport3D();
+
+        // 创建一个集合来存储几何信息
+        List<Tuple<IList<Vector3>, IList<int>>> geometries = new List<Tuple<IList<Vector3>, IList<int>>>();
+
+        // 在 UI 线程中收集几何信息
+        await Application.Current.Dispatcher.InvokeAsync(() => 
+        {
+            foreach (var model in viewport.Items.OfType<MeshGeometryModel3D>())
+            {
+                if (model.Geometry is HelixToolkit.Wpf.SharpDX.Geometry3D geometry)
+                {
+                    geometries.Add(new Tuple<IList<Vector3>, IList<int>>(geometry.Positions, geometry.Indices));
+                }
+            }
+        });
+
+        // 在后台线程中处理几何信息并写入 STL 文件
+        await Task.Run(() =>
+        {
+            using (StreamWriter writer = new StreamWriter(filePath))
+            {
+                writer.WriteLine("solid exportedModel");
+
+                foreach (var geometry in geometries)
+                {
+                    var positions = geometry.Item1;
+                    var indices = geometry.Item2;
+
+                    // 每三个索引构成一个三角形
+                    for (int i = 0; i < indices.Count; i += 3)
+                    {
+                        int index0 = indices[i];
+                        int index1 = indices[i + 1];
+                        int index2 = indices[i + 2];
+
+                        var p0 = positions[index0];
+                        var p1 = positions[index1];
+                        var p2 = positions[index2];
+
+                        // 计算法线
+                        var normal = CalculateNormal(p0, p1, p2);
+
+                        // 写入三角形信息到 STL 文件
+                        writer.WriteLine($"  facet normal {normal.X} {normal.Y} {normal.Z}");
+                        writer.WriteLine("    outer loop");
+                        writer.WriteLine($"      vertex {p0.X} {p0.Y} {p0.Z}");
+                        writer.WriteLine($"      vertex {p1.X} {p1.Y} {p1.Z}");
+                        writer.WriteLine($"      vertex {p2.X} {p2.Y} {p2.Z}");
+                        writer.WriteLine("    endloop");
+                        writer.WriteLine("  endfacet");
+                    }
+                }
+
+                // 写入 STL 文件结束
+                writer.WriteLine("endsolid exportedModel");
+            }
+        }).ConfigureAwait(false);
+
+    }
     /// <summary>
     /// 通过三角形实体集合生成每个面的边框线
     /// </summary>
@@ -473,7 +542,7 @@ public class ViewportHelperPro
     /// <param name="axis">中心</param>
     /// <param name="hasLine">是否包含线</param>
     /// <param name="speed">旋转时间  秒</param>
-    public static void RotateModel(Vector3D axis, bool hasLine = true, int speed = 5, int to = 360)
+    public static void RotateModel(Vector3D axis, bool hasLine = true, int speed = 7, int to = 360)
     {
         // 设置旋转的中心点和旋转轴
         var rotateTransform = new RotateTransform3D();

Views/UserControl/ViewportData/ViewportData.cs

@@ -141,16 +141,16 @@ public class ViewportData
     }
 
 
-    public bool SaveAsToStlFile(string filename)
+    public async Task SaveAsToStlFile(string filename)
     {
         try
         {
-            ViewportHelperPro.ExportModelsToStl(null, filename);
+            await ViewportHelperPro.ExportModelsToStlASync(filename);
-            return true;
+            return ;
         }
         catch
         {
-            return false;
+            return ;
         }
     }