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fix: offset inline feature coordinates by part location for G90 absolute mode

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Part.Program stores coordinates relative to the part's own origin, but
the Cincinnati post processor emits G90 (absolute positioning). Inline
features were writing part-relative coordinates directly without adding
Part.Location, producing incorrect output. Sub-program mode was
unaffected because it uses G92 to set up local coordinate systems.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
AJ Isaacs
2026-03-31 09:50:43 -04:00
parent d7fa4bef43
commit 568539d5b1
3 changed files with 77 additions and 7 deletions
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17
OpenNest.Posts.Cincinnati/CincinnatiFeatureWriter.cs
View File

@@ -23,6 +23,12 @@ public sealed class FeatureContext
public string LibraryFile { get; set; } = "";
public double CutDistance { get; set; }
public double SheetDiagonal { get; set; }
/// <summary>
/// Part location on the plate. Added to all output X/Y coordinates
/// so part-relative programs become plate-absolute under G90.
/// </summary>
public Vector PartLocation { get; set; } = Vector.Zero;
}
/// <summary>
@@ -51,12 +57,13 @@ public sealed class CincinnatiFeatureWriter
var currentPos = Vector.Zero;
var lastFeedVar = "";
var kerfEmitted = false;
var offset = ctx.PartLocation;
// Find the pierce point from the first rapid move
var piercePoint = FindPiercePoint(ctx.Codes);
// 1. Rapid to pierce point (with line number if configured)
WriteRapidToPierce(writer, ctx.FeatureNumber, piercePoint);
WriteRapidToPierce(writer, ctx.FeatureNumber, piercePoint, offset);
// 2. Part name comment on first feature of each part
if (ctx.IsFirstFeatureOfPart && !string.IsNullOrEmpty(ctx.PartName))
@@ -105,7 +112,7 @@ public sealed class CincinnatiFeatureWriter
kerfEmitted = true;
}
sb.Append($"G1 X{_fmt.FormatCoord(linear.EndPoint.X)} Y{_fmt.FormatCoord(linear.EndPoint.Y)}");
sb.Append($"G1 X{_fmt.FormatCoord(linear.EndPoint.X + offset.X)} Y{_fmt.FormatCoord(linear.EndPoint.Y + offset.Y)}");
// Feedrate — etch always uses process feedrate
var feedVar = ctx.IsEtch ? "#148" : GetLinearFeedVariable(linear.Layer);
@@ -131,7 +138,7 @@ public sealed class CincinnatiFeatureWriter
// G2 = CW, G3 = CCW
var gCode = arc.Rotation == RotationType.CW ? "G2" : "G3";
sb.Append($"{gCode} X{_fmt.FormatCoord(arc.EndPoint.X)} Y{_fmt.FormatCoord(arc.EndPoint.Y)}");
sb.Append($"{gCode} X{_fmt.FormatCoord(arc.EndPoint.X + offset.X)} Y{_fmt.FormatCoord(arc.EndPoint.Y + offset.Y)}");
// Convert absolute center to incremental I/J
var i = arc.CenterPoint.X - currentPos.X;
@@ -188,14 +195,14 @@ public sealed class CincinnatiFeatureWriter
return Vector.Zero;
}
private void WriteRapidToPierce(TextWriter writer, int featureNumber, Vector piercePoint)
private void WriteRapidToPierce(TextWriter writer, int featureNumber, Vector piercePoint, Vector offset)
{
var sb = new StringBuilder();
if (_config.UseLineNumbers)
sb.Append($"N{featureNumber} ");
sb.Append($"G0 X{_fmt.FormatCoord(piercePoint.X)} Y{_fmt.FormatCoord(piercePoint.Y)}");
sb.Append($"G0 X{_fmt.FormatCoord(piercePoint.X + offset.X)} Y{_fmt.FormatCoord(piercePoint.Y + offset.Y)}");
writer.WriteLine(sb.ToString());
}

6
OpenNest.Posts.Cincinnati/CincinnatiSheetWriter.cs
View File

@@ -153,7 +153,8 @@ public sealed class CincinnatiSheetWriter
IsEtch = isEtch,
LibraryFile = isEtch ? etchLibrary : cutLibrary,
CutDistance = cutDistance,
SheetDiagonal = sheetDiagonal
SheetDiagonal = sheetDiagonal,
PartLocation = part.Location
};
_featureWriter.Write(w, ctx);
@@ -240,7 +241,8 @@ public sealed class CincinnatiSheetWriter
IsEtch = isEtch,
LibraryFile = isEtch ? etchLibrary : cutLibrary,
CutDistance = cutDistance,
SheetDiagonal = sheetDiagonal
SheetDiagonal = sheetDiagonal,
PartLocation = part.Location
};
_featureWriter.Write(w, ctx);