Moved GetEtchLines to Etcher class

EtchBendLines/Bend.cs

@@ -53,71 +53,6 @@ namespace EtchBendLines
             return bend.Slope == this.Slope;
         }
 
-        public List<Line> GetEtchLines(double etchLength)
-        {
-            var lines = new List<Line>();
-
-            var startPoint = new Vector2(Line.StartPoint.X, Line.StartPoint.Y);
-            var endPoint = new Vector2(Line.EndPoint.X, Line.EndPoint.Y);
-            var bendLength = startPoint.DistanceTo(endPoint);
-
-            if (bendLength < (etchLength * 3.0))
-            {
-                lines.Add(new Line(Line.StartPoint, Line.EndPoint));
-            }
-            else
-            {
-                var angle = startPoint.AngleTo(endPoint);
-
-                if (Line.IsVertical())
-                {
-                    var x = Line.StartPoint.X;
-
-                    var bottomY1 = Math.Min(startPoint.Y, endPoint.Y);
-                    var bottomY2 = bottomY1 + etchLength;
-
-                    var topY1 = Math.Max(startPoint.Y, endPoint.Y);
-                    var topY2 = topY1 - etchLength;
-
-                    var p1 = new Vector2(x, bottomY1);
-                    var p2 = new Vector2(x, bottomY2);
-                    var p3 = new Vector2(x, topY1);
-                    var p4 = new Vector2(x, topY2);
-
-                    lines.Add(new Line(p1, p2));
-                    lines.Add(new Line(p3, p4));
-                }
-                else
-                {
-                    var start = Line.StartPoint.ToVector2();
-                    var end = Line.EndPoint.ToVector2();
-
-                    var x1 = Math.Cos(angle);
-                    var y1 = Math.Sin(angle);
-
-                    var p1 = new Vector2(start.X, start.Y);
-                    var p2 = new Vector2(start.X + x1, start.Y + y1);
-                    var p3 = new Vector2(end.X, end.Y);
-                    var p4 = new Vector2(end.X - x1, end.Y - y1);
-
-                    lines.Add(new Line(p1, p2));
-                    lines.Add(new Line(p3, p4));
-                }
-            }
-
-            var etchLayer = new Layer("ETCH")
-            {
-                Color = AciColor.Green,
-            };
-
-            foreach (var line in lines)
-            {
-                line.Layer = etchLayer;
-            }
-
-            return lines;
-        }
-
         public BendDirection Direction { get; set; }
 
         public double Length

EtchBendLines/BendLineExtractor.cs

@@ -1,6 +1,7 @@
 using netDxf;
 using netDxf.Entities;
 using System.Collections.Generic;
+using System.Globalization;
 using System.Linq;
 using System.Text.RegularExpressions;
 
@@ -31,7 +32,10 @@ namespace EtchBendLines
         /// <summary>
         /// The regular expression pattern the bend note must match
         /// </summary>
-        static readonly Regex bendNoteRegex = new Regex(@"(?<direction>UP|DOWN|DN)\s*(?<angle>\d*(\.\d*)?)°\s*R\s*(?<radius>\d*(\.\d*)?)");
+        static readonly Regex bendNoteRegex = new Regex(
+            @"\b(?<direction>UP|DOWN|DN)\s+(?<angle>\d+(\.\d+)?)°?\s*R\s*(?<radius>\d+(\.\d+)?)\b",
+            RegexOptions.Compiled | RegexOptions.IgnoreCase
+        );
 
         public DxfDocument DxfDocument { get; private set; }
 
@@ -45,7 +49,7 @@ namespace EtchBendLines
 
             foreach (var line in DxfDocument.Lines)
             {
-                if (line.Linetype.Name != "CENTERX2" && line.Layer.Name != "BEND")
+                if (!IsBendLine(line))
                     continue;
 
                 var bend = new Bend
@@ -62,6 +66,11 @@ namespace EtchBendLines
             return bends.Where(b => b.Radius <= MaxBendRadius).ToList();
         }
 
+        private bool IsBendLine(Line line)
+        {
+            return line.Linetype.Name == "CENTERX2" && line.Layer.Name == "BEND";
+        }
+
         private List<MText> GetBendNotes()
         {
             return DxfDocument.MTexts
@@ -124,8 +133,10 @@ namespace EtchBendLines
 
                 if (match.Success)
                 {
-                    bendline.Radius = double.Parse(match.Groups["radius"].Value);
-                    bendline.Angle = double.Parse(match.Groups["angle"].Value);
+                    var radius = match.Groups["radius"].Value;
+                    var angle = match.Groups["angle"].Value;
+                    bendline.Radius = double.Parse(radius, CultureInfo.InvariantCulture);
+                    bendline.Angle = double.Parse(angle, CultureInfo.InvariantCulture);
                 }
             }
         }

EtchBendLines/Etcher.cs

@@ -1,4 +1,5 @@
 using netDxf;
+using netDxf.Entities;
 using netDxf.Tables;
 using System;
 using System.Collections.Generic;
@@ -8,11 +9,16 @@ namespace EtchBendLines
 {
     public class Etcher
     {
-        public Layer BendLayer = new Layer("BEND")
+        public readonly Layer BendLayer = new Layer("BEND")
         {
             Color = AciColor.Yellow
         };
 
+        static readonly Layer EtchLayer = new Layer("ETCH")
+        {
+            Color = AciColor.Green,
+        };
+
         public double EtchLength { get; set; } = 1.0;
 
         public double MaxBendRadius { get; set; } = 4.0;
@@ -40,7 +46,9 @@ namespace EtchBendLines
             {
                 bendLine.Line.Layer = BendLayer;
                 bendLine.Line.Color = AciColor.ByLayer;
+
                 bendLine.BendNote.Layer = BendLayer;
+                bendLine.BendNote.Color = AciColor.ByLayer;
             }
 
             var upBends = bendLines.Where(b => b.Direction == BendDirection.Up);
@@ -51,7 +59,7 @@ namespace EtchBendLines
 
             foreach (var bendline in upBends)
             {
-                var etchLines = bendline.GetEtchLines(EtchLength);
+                var etchLines = GetEtchLines(bendline.Line, EtchLength);
 
                 foreach (var etchLine in etchLines)
                 {
@@ -86,5 +94,65 @@ namespace EtchBendLines
 
             return false;
         }
+
+        public List<Line> GetEtchLines(Line bendLine, double etchLength)
+        {
+            var lines = new List<Line>();
+
+            var startPoint = new Vector2(bendLine.StartPoint.X, bendLine.StartPoint.Y);
+            var endPoint = new Vector2(bendLine.EndPoint.X, bendLine.EndPoint.Y);
+            var bendLength = startPoint.DistanceTo(endPoint);
+
+            if (bendLength < (etchLength * 3.0))
+            {
+                lines.Add(new Line(bendLine.StartPoint, bendLine.EndPoint));
+            }
+            else
+            {
+                var angle = startPoint.AngleTo(endPoint);
+
+                if (bendLine.IsVertical())
+                {
+                    var x = bendLine.StartPoint.X;
+
+                    var bottomY1 = Math.Min(startPoint.Y, endPoint.Y);
+                    var bottomY2 = bottomY1 + etchLength;
+
+                    var topY1 = Math.Max(startPoint.Y, endPoint.Y);
+                    var topY2 = topY1 - etchLength;
+
+                    var p1 = new Vector2(x, bottomY1);
+                    var p2 = new Vector2(x, bottomY2);
+                    var p3 = new Vector2(x, topY1);
+                    var p4 = new Vector2(x, topY2);
+
+                    lines.Add(new Line(p1, p2));
+                    lines.Add(new Line(p3, p4));
+                }
+                else
+                {
+                    var start = bendLine.StartPoint.ToVector2();
+                    var end = bendLine.EndPoint.ToVector2();
+
+                    var dx = Math.Cos(angle) * etchLength;
+                    var dy = Math.Sin(angle) * etchLength;
+
+                    var p1 = new Vector2(start.X, start.Y);
+                    var p2 = new Vector2(start.X + dx, start.Y + dy);
+                    var p3 = new Vector2(end.X, end.Y);
+                    var p4 = new Vector2(end.X - dx, end.Y - dy);
+
+                    lines.Add(new Line(p1, p2));
+                    lines.Add(new Line(p3, p4));
+                }
+            }
+
+            foreach (var line in lines)
+            {
+                line.Layer = EtchLayer;
+            }
+
+            return lines;
+        }
     }
 }