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feat: dual-tangent arc fitting and DXF version export

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Add ArcFit.FitWithDualTangent to constrain replacement arcs to match
tangent directions at both endpoints, preventing kinks without
introducing gaps. Add DXF year selection to CAD converter export.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
AJ Isaacs
2026-03-30 09:16:09 -04:00
parent 9b2322abe9
commit 722f758e94
3 changed files with 124 additions and 2 deletions
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OpenNest/Forms/CadConverterForm.cs
+19 -2
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@@ -494,13 +494,30 @@ namespace OpenNest.Forms
using var dlg = new SaveFileDialog
{
Filter = "DXF Files|*.dxf",
Filter = "DXF 2018 (*.dxf)|*.dxf|" +
"DXF 2013 (*.dxf)|*.dxf|" +
"DXF 2010 (*.dxf)|*.dxf|" +
"DXF 2007 (*.dxf)|*.dxf|" +
"DXF 2004 (*.dxf)|*.dxf|" +
"DXF 2000 (*.dxf)|*.dxf|" +
"DXF R14 (*.dxf)|*.dxf",
FileName = Path.ChangeExtension(item.Name, ".dxf"),
};
if (dlg.ShowDialog() != DialogResult.OK) return;
var doc = new ACadSharp.CadDocument();
var version = dlg.FilterIndex switch
{
2 => ACadSharp.ACadVersion.AC1027,
3 => ACadSharp.ACadVersion.AC1024,
4 => ACadSharp.ACadVersion.AC1021,
5 => ACadSharp.ACadVersion.AC1018,
6 => ACadSharp.ACadVersion.AC1015,
7 => ACadSharp.ACadVersion.AC1014,
_ => ACadSharp.ACadVersion.AC1032,
};
var doc = new ACadSharp.CadDocument(version);
foreach (var entity in item.Entities)
{
switch (entity)