fix:

Views/UserControl/Viewport3D.xaml.cs

@@ -413,12 +413,14 @@ public partial class Viewport3D
                 ViewportManager.ResetChooseAddModels();
                 break;
             case "ViewportRightMenuShowMeshLines":
+                var center = ViewportManager.ModelBounds.Center;
                 var maxDimension = ViewportManager.ModelBounds.Size.Length();
                 var distance = maxDimension * 1.2; // 调整相机到模型的距离，保证视野范围内
-                var center = ViewportManager.ModelBounds.Center;
+                // 获取当前相机
                 var camera = Viewport3Dx.Camera as HelixToolkit.Wpf.SharpDX.PerspectiveCamera;
                 camera.Position = new Point3D(center.X, center.Y - distance, center.Z); // 从底部看，Y轴负方向
                 camera.UpDirection = new Vector3D(0, 0, -1);
+                camera.LookDirection = new Vector3D(center.X - camera.Position.X, center.Y - camera.Position.Y, center.Z - camera.Position.Z);
                 ViewportManager.ShowMeshLines(checkResult);
                 //camera.LookDirection = new Vector3D(center.X - camera.Position.X, center.Y - camera.Position.Y, center.Z - camera.Position.Z);
 

Views/UserControl/ViewportData/Helper/LineCalculationHelper.cs

@@ -12,7 +12,7 @@ namespace SparkClient.Views.UserControl.ViewportData.Helper
     {
         private readonly float Y = -0.01F;
         private Vector3 point1;
-        private Vector3 point2;
+        private Vector3 center;
         /// <summary>
         /// 常数a（y=ax+b）
         /// </summary>
@@ -21,21 +21,21 @@ namespace SparkClient.Views.UserControl.ViewportData.Helper
         /// 常数b（y=ax+b）
         /// </summary>
         private float b;
-        public LineCalculationHelper(Vector3 point1, Vector3 point2) { 
+        public LineCalculationHelper(Vector3 point1, Vector3 center) { 
             this.point1 = point1;
-            this.point2 = point2;
-            this.a = calA(point1, point2);
+            this.center = center;
+            this.a = calA(point1, center);
             this.b = calB(point1, a);
         }
         /// <summary>
         /// 常数a的计算
         /// </summary>
         /// <param name="point1"></param>
-        /// <param name="point2"></param>
+        /// <param name="center"></param>
         /// <returns></returns>
-        private float calA(Vector3 point1, Vector3 point2)
+        private float calA(Vector3 point1, Vector3 center)
         {
-            return (point1.Z - point2.Z) / (point1.X - point2.X);
+            return (point1.Z - center.Z) / (point1.X - center.X);
         }
         /// <summary>
         /// 常数b的计算
@@ -50,18 +50,20 @@ namespace SparkClient.Views.UserControl.ViewportData.Helper
 
         public Tuple<Vector3, Vector3> calXline(float length)
         {
-            var x1 = 5;
-            var z1 = calZ(x1);
-            var x2 = -5;
-            var z2 = calZ(x2);
+            var twoPoint = CalculatePointsOnLine(this.a,length);
+            var x1 = twoPoint.p1.X;
+            var z1 = twoPoint.p1.Y;
+            var x2 = twoPoint.p2.X;
+            var z2 = twoPoint.p2.X;
             return new Tuple<Vector3, Vector3>(new Vector3(x1, Y, z1), new Vector3(x2, Y, z2));
         }
         public Tuple<Vector3, Vector3> calYline(float length)
         {
-            var x1 = 5;
-            var z1 = calZVertical(x1);
-            var x2 = -5;
-            var z2 = calZVertical(x2);
+            var twoPoint = CalculatePointsOnLine(-(1/a), length);
+            var x1 = twoPoint.p1.X;
+            var z1 = twoPoint.p1.Y;
+            var x2 = twoPoint.p2.X;
+            var z2 = twoPoint.p2.X;
             return new Tuple<Vector3, Vector3>(new Vector3(x1, Y, z1), new Vector3(x2, Y, z2));
         }
 
@@ -95,5 +97,33 @@ namespace SparkClient.Views.UserControl.ViewportData.Helper
         {
             return (-x / a)  + b + offset;
         }
+
+        private ((float X, float Y) p1, (float X, float Y) p2) CalculatePointsOnLine(float k ,float L)
+        {
+            float x0 = center.X;
+            float y0 = center.Z;
+            // 将距离公式展开并整理为关于 t 的二次方程
+            float A = 1 + k * k;
+            float B = -2 * x0 + 2 * k * (b - y0);
+            float C = x0 * x0 + (b - y0) * (b - y0) - L * L;
+
+            // 计算判别式
+            float discriminant = B * B - 4 * A * C;
+
+            if (discriminant < 0)
+            {
+                throw new InvalidOperationException("无解：距离 L 太小，无法找到满足条件的点。");
+            }
+
+            // 计算 t 的两个解
+            float t1 = (float)(-B + Math.Sqrt(discriminant)) / (2 * A);
+            float t2 = (float)(-B - Math.Sqrt(discriminant)) / (2 * A);
+
+            // 计算两点坐标
+            var p1 = (X: t1, Y: k * t1 + b);
+            var p2 = (X: t2, Y: k * t2 + b);
+
+            return (p1, p2);
+        }
     }
 }

Views/UserControl/ViewportData/Helper/ViewportHelperPro.cs

@@ -1273,6 +1273,12 @@ public class ViewportHelperPro
         lights.ForEach(item => viewport.Items.Remove(item));
     }
     private static Dictionary<Guid, Guid> moveLines = new Dictionary<Guid, Guid>();
+    /// <summary>
+    /// 网状参考线
+    /// </summary>
+    /// <param name="entities"></param>
+    /// <param name="thickness"></param>
+    /// <returns></returns>
     public static List<LineGeometryModel3D> ShowMeshLines(List<Viewport3DTriangleEntity> entities, double thickness = 1.0)
     {
         moveLines = new();
@@ -1288,9 +1294,14 @@ public class ViewportHelperPro
         
         var edgeLines = new List<Tuple<Vector3, Vector3>>();
         Color4 XlineColor =new Color4(80f, 0f, 0f, 1f);
-        var x1 = 5;
+        float r =5;
+        if(double.TryParse(ViewportManager.DiamondData["M2"].ToString(), out var v))
+        {
+            r = (float)(v*0.501);
+        }
+        var x1 = r;
         var z1 = lineCal.calZ(x1);
-        var x2 = -5;
+        var x2 = -r;
         var z2 = lineCal.calZ(x2);
         edgeLines.Add(new Tuple<Vector3, Vector3>(new Vector3(x1, Y, z1), new Vector3(x2, Y, z2)));
         lines.Add(DisplayLineModel3D(edgeLines, XlineColor));
@@ -1318,9 +1329,9 @@ public class ViewportHelperPro
         bindingMoveLine(lineE, lineF);
 
         Color4 YlineColor = new Color4(0F, 80f, 0f, 1f);
-        var x3 = 5;
+        var x3 = r;
         var z3 = lineCal.calZVertical(x3);
-        var x4 = -5;
+        var x4 = -r;
         var z4 = lineCal.calZVertical(x4);
 
         edgeLines = new List<Tuple<Vector3, Vector3>>();
@@ -1350,7 +1361,11 @@ public class ViewportHelperPro
         bindingMoveLine(lineG, lineH);
         return lines;
     }
-
+    /// <summary>
+    /// 网状参考线 对向移动绑定
+    /// </summary>
+    /// <param name="lineA"></param>
+    /// <param name="lineB"></param>
     private static void bindingMoveLine(LineGeometryModel3D lineA, LineGeometryModel3D lineB)
     {
         lineA.MouseDown3D += LineA_MouseDown3D;
@@ -1386,7 +1401,7 @@ public class ViewportHelperPro
                 var perpendicularDirection = Vector3D.CrossProduct(lineDirection.ToVector3D(), Vector3D.CrossProduct(moveDirection, lineDirection.ToVector3D()));
                 perpendicularDirection.Normalize();
 
-                double scaleFactor = 0.1; // 缩放因子
+                double scaleFactor = 0.05; // 缩放因子
                 // 计算垂直距离
                 double perpendicularDistance = Vector3D.DotProduct(moveDirection, perpendicularDirection) * scaleFactor;
                 System.Console.WriteLine("距离："+ perpendicularDistance);
@@ -1436,11 +1451,11 @@ public class ViewportHelperPro
         // 创建射线
         var ray = new Ray3D(
             camera.Position,
-            new Vector3D(mousePosition.X - Viewport.ActualWidth / 2, -(mousePosition.Y - Viewport.ActualHeight / 2), -camera.Position.Z)
+            new Vector3D(mousePosition.X - Viewport.ActualWidth / 2, -camera.Position.Y, -(mousePosition.Y - Viewport.ActualHeight / 2) )
         );
 
         // 创建平面（假设平面为 Y=0）
-        var plane = new Plane3D(new Point3D(0, 0, 0), new Vector3D(0, 0, 1));
+        var plane = new Plane3D(new Point3D(0, 0, 0), new Vector3D(0, 1, 0));
 
         // 计算射线与平面的交点
         var intersection = GetIntersection(ray, plane);
@@ -1456,13 +1471,23 @@ public class ViewportHelperPro
         // 使用 Plane3D.LineIntersection 方法计算交点
         return plane.LineIntersection(ray.Origin, rayEnd);
     }
-
+    private static double initialRadius = 1.0; // 初始半径
+    private static double endRadius = 1.0; // 拖拽后半径
+    private static double initDistance = 1.0; // 初始与圆心之间距离
+    private static double endDistance = 1.0; // 拖拽后与圆心之间距离
+    private static Point dragStartPoint;
+    /// <summary>
+    /// 圆圈参考线
+    /// </summary>
+    /// <param name="radius"></param>
+    /// <param name="thickness"></param>
+    /// <returns></returns>
     public static LineGeometryModel3D ShowCircleLine(double radius = 1.0, double thickness = 1.0)
     {
         var Y = -0.01F;
         var center = ViewportManager.CenterVector;
         center.Y = Y;
-        return UpdateCircleGeometry(center);
+        return UpdateCircleGeometry(center, initialRadius);
     }
     private static LineGeometryModel3D UpdateCircleGeometry(Vector3 center, double radius = 1.0)
     {
@@ -1482,11 +1507,106 @@ public class ViewportHelperPro
             indices.Add(i);
             indices.Add((i + 1) % segments);
         }
-
+        var Circle = DisplayLineModel3D(positions, Color4.Black);
+        Circle.MouseDown3D += Circle_MouseDown3D;
+        Circle.MouseUp3D += Circle_MouseUp3D;
+        Circle.MouseMove3D += Circle_MouseMove3D;
         // 更新圆形线的几何形状
-       return DisplayLineModel3D(positions, Color4.Black);
+        return Circle;
+    }
+
+    private static void Circle_MouseMove3D(object sender, RoutedEventArgs e)
+    {
+        if (isDrawing)
+        {
+            if (e is HelixToolkit.Wpf.SharpDX.MouseMove3DEventArgs ev)
+            {
+                var line = sender as LineGeometryModel3D;
+
+                if (line==null)
+                {
+                    return;
+                }
+                var MinRadius = 0.1;
+                var MaxRadius = (ViewportManager.ModelBounds.Maximum.X - ViewportManager.ModelBounds.Minimum.X) * 0.6;
+                // 现在鼠标对于3d模型的位置
+                var mousePosition = ev.Position;
+                var Y = -0.01F;
+                var center = ViewportManager.CenterVector;
+                center.Y = Y;
+
+                Point3D mouseWorldPosition = Get3DPointFromMouse(mousePosition);
+
+                // 计算鼠标与圆心的距离
+                double distance = CalculateDistance(mouseWorldPosition, center.ToPoint3D());
+
+                double scaleFactor = 0;
+
+                if (distance < initDistance)
+                {
+                    // 鼠标靠近圆心，缩小半径
+                    scaleFactor = -0.01;
+                }
+                else
+                {
+                    // 鼠标远离圆心，扩大半径
+                    scaleFactor = +0.01;
+                }
+
+                // 计算鼠标移动的距离（以屏幕坐标为单位）
+                double delta = (dragStartPoint - mousePosition).Length;
+
+                // 计算新的半径
+                double newRadius = initialRadius + delta * scaleFactor; // 缩放因子
+
+                // 限制半径范围
+                newRadius = Math.Clamp(newRadius, MinRadius, MaxRadius);
+
+                var scaleTransform = new ScaleTransform3D(newRadius, 1, newRadius); // 缩放变换
+                line.Transform = scaleTransform;
+                endRadius = newRadius;
+                endDistance = distance;
+            }
+        }
+    }
+    // 计算两点之间的距离
+    private static double CalculateDistance(Point3D p1, Point3D p2)
+    {
+        double dx = p2.X - p1.X;
+        double dy = p2.Y - p1.Y;
+        double dz = p2.Z - p1.Z;
+
+        return Math.Sqrt(dx * dx + dy * dy + dz * dz);
+    }
+    private static void Circle_MouseUp3D(object sender, RoutedEventArgs e)
+    {
+        isDrawing = false;
+        var Viewport = ViewportManager.GetViewport3D();
+        initialRadius = endRadius;
+        initDistance = endDistance;
+        // 释放鼠标捕获
+        Viewport.ReleaseMouseCapture();
     }
 
+    private static void Circle_MouseDown3D(object sender, RoutedEventArgs e)
+    {
+        isDrawing = true;
+        if (e is HelixToolkit.Wpf.SharpDX.MouseDown3DEventArgs ev)
+        {
+            var line = sender as LineGeometryModel3D;
+
+            // 获取鼠标点击的位置
+            dragStartPoint = ev.Position;
+            Point3D mouseWorldPosition = Get3DPointFromMouse(dragStartPoint);
+            var Y = -0.01F;
+            var center = ViewportManager.CenterVector;
+            center.Y = Y;
+            initDistance = CalculateDistance(mouseWorldPosition, center.ToPoint3D());
+            var Viewport = ViewportManager.GetViewport3D();
+            // 捕获鼠标
+            Viewport.CaptureMouse();
+        }
+    }
     #region 私有方法
 
     /// <summary>

Views/UserControl/ViewportData/Helper/ViewportManager.cs

@@ -278,6 +278,7 @@ public class ViewportManager
         _viewport.Camera.UpDirection = new Vector3D(0, -1, 0);
         _viewport.RenderHost.MSAA = MSAALevel.Maximum;
         // TODO:
+        MainModelMeshLines.Clear();
         MainModelMeshLines.AddRange(ViewportHelperPro.ShowMeshLines(entities));
         MainModelCircleLine = ViewportHelperPro.ShowCircleLine();
     }