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fix: detect bend lines from SolidWorks DXF exports

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Three issues prevented bend line detection after the ACadSharp migration:

1. IsBendLine required layer "BEND" but SolidWorks exports bend lines
   on layer "0" with CENTERX2 linetype. Added "0" as accepted layer.

2. Bend note regex used literal ° which failed when ACadSharp reads the
   degree symbol as multi-byte "°" due to ANSI/UTF-8 encoding mismatch.
   Changed to [^R\d]* to tolerate any characters between angle and R.

3. Radius filter excluded bends with null Radius (unparsed notes).
   Nullable comparison null <= 4.0 evaluates to false in C#, filtering
   out all bends. Added null check to include unparsed bends.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
AJ Isaacs
2026-02-19 14:33:59 -05:00
parent 6e131d402e
commit bf36a56387
1 changed files with 3 additions and 2 deletions
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5
EtchBendLines/BendLineExtractor.cs
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@@ -36,7 +36,7 @@ namespace EtchBendLines
/// The regular expression pattern the bend note must match
/// </summary>
static readonly Regex bendNoteRegex = new Regex(
@"\b(?<direction>UP|DOWN|DN)\s+(?<angle>\d+(\.\d+)?)°?\s*R\s*(?<radius>\d+(\.\d+)?)\b",
@"\b(?<direction>UP|DOWN|DN)\s+(?<angle>\d+(\.\d+)?)[^R\d]*R\s*(?<radius>\d+(\.\d+)?)\b",
RegexOptions.Compiled | RegexOptions.IgnoreCase
);
@@ -66,7 +66,7 @@ namespace EtchBendLines
AssignBendDirections(bends, bendNotes);
return bends.Where(b => b.Radius <= MaxBendRadius).ToList();
return bends.Where(b => b.Radius == null || b.Radius <= MaxBendRadius).ToList();
}
private bool IsBendLine(Line line)
@@ -76,6 +76,7 @@ namespace EtchBendLines
switch (line.Layer.Name.ToUpperInvariant())
{
case "0":
case "BEND":
case "BEND LINES":
case "BENDLINES":