集成测量工具：点点距、点线距、角度测量；十字辅助线；右键菜单；图像自适应窗口优化

2026-04-24 14:36:52 +08:00
parent 9e39447144
commit 7fdc6adb44
6 changed files with 211 additions and 12 deletions
@@ -0,0 +1,86 @@
+using System;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media;
+using System.Windows.Shapes;
+
+namespace XP.ImageProcessing.RoiControl.Models
+{
+    /// <summary>一次角度测量的所有视觉元素（顶点V + 射线端点A/B + 两条射线 + 弧线 + 标签）</summary>
+    public class AngleGroup
+    {
+        public Ellipse DotV { get; set; }   // 顶点
+        public Ellipse DotA { get; set; }   // 射线端点A
+        public Ellipse DotB { get; set; }   // 射线端点B
+        public Line LineA { get; set; }     // 射线VA
+        public Line LineB { get; set; }     // 射线VB
+        public Path Arc { get; set; }       // 角度弧线
+        public TextBlock Label { get; set; }
+        public Point V { get; set; }
+        public Point A { get; set; }
+        public Point B { get; set; }
+
+        public double AngleDeg
+        {
+            get
+            {
+                double vax = A.X - V.X, vay = A.Y - V.Y;
+                double vbx = B.X - V.X, vby = B.Y - V.Y;
+                double lenA = Math.Sqrt(vax * vax + vay * vay);
+                double lenB = Math.Sqrt(vbx * vbx + vby * vby);
+                if (lenA < 0.001 || lenB < 0.001) return 0;
+                double dot = vax * vbx + vay * vby;
+                double cos = Math.Clamp(dot / (lenA * lenB), -1.0, 1.0);
+                return Math.Acos(cos) * 180.0 / Math.PI;
+            }
+        }
+
+        public void UpdateVisuals()
+        {
+            // 射线
+            LineA.X1 = V.X; LineA.Y1 = V.Y; LineA.X2 = A.X; LineA.Y2 = A.Y;
+            LineA.Visibility = Visibility.Visible;
+            LineB.X1 = V.X; LineB.Y1 = V.Y; LineB.X2 = B.X; LineB.Y2 = B.Y;
+            LineB.Visibility = Visibility.Visible;
+
+            // 弧线
+            double vax = A.X - V.X, vay = A.Y - V.Y;
+            double vbx = B.X - V.X, vby = B.Y - V.Y;
+            double lenA = Math.Sqrt(vax * vax + vay * vay);
+            double lenB = Math.Sqrt(vbx * vbx + vby * vby);
+
+            if (lenA < 1 || lenB < 1) { Arc.Visibility = Visibility.Collapsed; return; }
+
+            double arcRadius = Math.Min(30, Math.Min(lenA, lenB) * 0.3);
+            if (arcRadius < 8) arcRadius = 8;
+
+            double angleARad = Math.Atan2(vay, vax);
+            double angleBRad = Math.Atan2(vby, vbx);
+            double cross = vax * vby - vay * vbx;
+            double angleDeg = AngleDeg;
+            bool isLargeArc = angleDeg > 180;
+            var sweepDir = cross >= 0 ? SweepDirection.Clockwise : SweepDirection.Counterclockwise;
+
+            var startPt = new Point(V.X + arcRadius * Math.Cos(angleARad), V.Y + arcRadius * Math.Sin(angleARad));
+            var endPt = new Point(V.X + arcRadius * Math.Cos(angleBRad), V.Y + arcRadius * Math.Sin(angleBRad));
+
+            var arcSeg = new ArcSegment(endPt, new Size(arcRadius, arcRadius), 0, isLargeArc, sweepDir, true);
+            var fig = new PathFigure(startPt, new[] { arcSeg }, false);
+            Arc.Data = new PathGeometry(new[] { fig });
+            Arc.Visibility = Visibility.Visible;
+
+            // 标签位置
+            double midAngle = (angleARad + angleBRad) / 2.0;
+            double testX = Math.Cos(midAngle), testY = Math.Sin(midAngle);
+            double testCross = vax * testY - vay * testX;
+            if ((cross >= 0 && testCross < 0) || (cross < 0 && testCross >= 0))
+                midAngle += Math.PI;
+
+            double labelDist = arcRadius + 16;
+            Label.Text = $"{angleDeg:F1}°";
+            Canvas.SetLeft(Label, V.X + labelDist * Math.Cos(midAngle) - 15);
+            Canvas.SetTop(Label, V.Y + labelDist * Math.Sin(midAngle) - 8);
+            Label.Visibility = Visibility.Visible;
+        }
+    }
+}
@@ -4,6 +4,7 @@ namespace XP.ImageProcessing.RoiControl.Models
    {
        None,
        PointDistance,
-        PointToLine
+        PointToLine,
+        Angle
    }
 }