style: apply CSharpier formatting to files merged from arc-tangency branch

OpenNest.Core/Converters/ConvertGeometry.cs

@@ -95,7 +95,16 @@ namespace OpenNest.Converters
             }
             else
             {
-                pgm.Codes.Add(new ArcMove(endpt, arc.Center, arc.IsReversed ? RotationType.CW : RotationType.CCW) { Layer = layer });
+                pgm.Codes.Add(
+                    new ArcMove(
+                        endpt,
+                        arc.Center,
+                        arc.IsReversed ? RotationType.CW : RotationType.CCW
+                    )
+                    {
+                        Layer = layer,
+                    }
+                );
             }
 
             return lastpt;
@@ -108,7 +117,12 @@ namespace OpenNest.Converters
             if (startpt.DistanceTo(lastpt) > Tolerance.ChainTolerance)
                 pgm.MoveTo(startpt);
 
-            pgm.Codes.Add(new ArcMove(startpt, circle.Center, circle.Rotation) { Layer = ClassifyLayer(circle) });
+            pgm.Codes.Add(
+                new ArcMove(startpt, circle.Center, circle.Rotation)
+                {
+                    Layer = ClassifyLayer(circle),
+                }
+            );
 
             lastpt = startpt;
             return lastpt;
@@ -130,8 +144,10 @@ namespace OpenNest.Converters
         private static LayerType ClassifyLayer(Entity geo)
         {
             var name = geo.Layer?.Name;
-            if (string.Equals(name, "ENGRAVE", System.StringComparison.OrdinalIgnoreCase) ||
+            if (
-                string.Equals(name, "ETCH", System.StringComparison.OrdinalIgnoreCase))
+                string.Equals(name, "ENGRAVE", System.StringComparison.OrdinalIgnoreCase)
+                || string.Equals(name, "ETCH", System.StringComparison.OrdinalIgnoreCase)
+            )
                 return LayerType.Scribe;
 
             return LayerType.Cut;

OpenNest.Core/Geometry/ArcFit.cs

@@ -14,7 +14,9 @@ namespace OpenNest.Geometry
         /// the arc passes through both endpoints and departs P1 in the given direction.
         /// </summary>
         internal static (Vector center, double radius, double deviation) FitWithStartTangent(
-            List<Vector> points, Vector tangent)
+            List<Vector> points,
+            Vector tangent
+        )
         {
             if (points.Count < 3)
                 return (Vector.Invalid, 0, double.MaxValue);
@@ -64,8 +66,15 @@ namespace OpenNest.Geometry
         /// two requested ones — when the requested tangents are consistent with a single
         /// circular arc, both are matched exactly.
         /// </summary>
-        internal static (Vector center, double radius, double deviation) FitThroughEndpointsWithTangents(
+        internal static (
-            List<Vector> points, Vector startTangent, Vector endTangent)
+            Vector center,
+            double radius,
+            double deviation
+        ) FitThroughEndpointsWithTangents(
+            List<Vector> points,
+            Vector startTangent,
+            Vector endTangent
+        )
         {
             if (points.Count < 3)
                 return (Vector.Invalid, 0, double.MaxValue);
@@ -104,14 +113,20 @@ namespace OpenNest.Geometry
         private static double SignedAngle(double ux, double uy, Vector to)
         {
             var len = System.Math.Sqrt(to.X * to.X + to.Y * to.Y);
-            if (len < 1e-10) return 0;
+            if (len < 1e-10)
+                return 0;
             return System.Math.Atan2(ux * to.Y - uy * to.X, ux * to.X + uy * to.Y);
         }
 
         /// <summary>
         /// Computes the maximum radial deviation of interior points from a circle.
         /// </summary>
-        internal static double MaxRadialDeviation(List<Vector> points, double cx, double cy, double radius)
+        internal static double MaxRadialDeviation(
+            List<Vector> points,
+            double cx,
+            double cy,
+            double radius
+        )
         {
             var maxDev = 0.0;
             for (var i = 1; i < points.Count - 1; i++)
@@ -120,7 +135,8 @@ namespace OpenNest.Geometry
                 var py = points[i].Y - cy;
                 var dist = System.Math.Sqrt(px * px + py * py);
                 var dev = System.Math.Abs(dist - radius);
-                if (dev > maxDev) maxDev = dev;
+                if (dev > maxDev)
+                    maxDev = dev;
             }
             return maxDev;
         }

OpenNest.Core/Geometry/GeometrySimplifier.cs

@@ -15,8 +15,10 @@ public class ArcCandidate
     public double MaxDeviation { get; set; }
     public Box BoundingBox { get; set; }
     public bool IsSelected { get; set; } = true;
+
     /// <summary>First point of the original line segments this candidate covers.</summary>
     public Vector FirstPoint { get; set; }
+
     /// <summary>Last point of the original line segments this candidate covers.</summary>
     public Vector LastPoint { get; set; }
 }
@@ -46,9 +48,7 @@ public class MirrorAxisResult
         var dx = p.X - Point.X;
         var dy = p.Y - Point.Y;
         var dot = dx * Direction.X + dy * Direction.Y;
-        return new Vector(
+        return new Vector(p.X - 2 * (dx - dot * Direction.X), p.Y - 2 * (dy - dot * Direction.Y));
-            p.X - 2 * (dx - dot * Direction.X),
-            p.Y - 2 * (dy - dot * Direction.Y));
     }
 }
 
@@ -74,9 +74,14 @@ public class GeometrySimplifier
             var runStart = i;
             var layerName = entities[i].Layer?.Name;
             var lineCount = 0;
-            while (i < entities.Count && (entities[i] is Line || entities[i] is Arc) && entities[i].Layer?.Name == layerName)
+            while (
+                i < entities.Count
+                && (entities[i] is Line || entities[i] is Arc)
+                && entities[i].Layer?.Name == layerName
+            )
             {
-                if (entities[i] is Line) lineCount++;
+                if (entities[i] is Line)
+                    lineCount++;
                 i++;
             }
             var runEnd = i - 1;
@@ -90,10 +95,7 @@ public class GeometrySimplifier
 
     public Shape Apply(Shape shape, List<ArcCandidate> candidates)
     {
-        var selected = candidates
+        var selected = candidates.Where(c => c.IsSelected).OrderBy(c => c.StartIndex).ToList();
-            .Where(c => c.IsSelected)
-            .OrderBy(c => c.StartIndex)
-            .ToList();
 
         var newEntities = new List<Entity>();
         var i = 0;
@@ -132,11 +134,10 @@ public class GeometrySimplifier
         foreach (var e in shape.Entities)
             midpoints.Add(e.BoundingBox.Center);
 
-        if (midpoints.Count < 4) return MirrorAxisResult.None;
+        if (midpoints.Count < 4)
+            return MirrorAxisResult.None;
 
-        var centroid = new Vector(
+        var centroid = new Vector(midpoints.Average(p => p.X), midpoints.Average(p => p.Y));
-            midpoints.Average(p => p.X),
-            midpoints.Average(p => p.Y));
         var cx = centroid.X;
         var cy = centroid.Y;
 
@@ -190,8 +191,7 @@ public class GeometrySimplifier
         return bestResult.Score >= 0.8 ? bestResult : MirrorAxisResult.None;
     }
 
-    private static double NormalizeAngle(double angle) =>
+    private static double NormalizeAngle(double angle) => angle < 0 ? angle + Angle.TwoPI : angle;
-        angle < 0 ? angle + Angle.TwoPI : angle;
 
     private static Vector Normalize(Vector v)
     {
@@ -231,7 +231,8 @@ public class GeometrySimplifier
 
             for (var j = 0; j < points.Count; j++)
             {
-                if (i == j) continue;
+                if (i == j)
+                    continue;
                 var d = reflected.DistanceTo(points[j]);
                 if (d < matchTol)
                 {
@@ -251,17 +252,20 @@ public class GeometrySimplifier
     /// </summary>
     public void Symmetrize(List<ArcCandidate> candidates, MirrorAxisResult axis)
     {
-        if (!axis.IsValid || candidates.Count < 2) return;
+        if (!axis.IsValid || candidates.Count < 2)
+            return;
 
         var paired = new HashSet<int>();
 
         for (var i = 0; i < candidates.Count; i++)
         {
-            if (paired.Contains(i)) continue;
+            if (paired.Contains(i))
+                continue;
 
             var ci = candidates[i];
             var ciCenter = ci.BoundingBox.Center;
-            if (PerpendicularDistance(ciCenter, axis.Point, axis.Direction) < 0.1) continue; // on the axis
+            if (PerpendicularDistance(ciCenter, axis.Point, axis.Direction) < 0.1)
+                continue; // on the axis
 
             var mirrorCenter = axis.Reflect(ciCenter);
 
@@ -269,7 +273,8 @@ public class GeometrySimplifier
             var bestDist = double.MaxValue;
             for (var j = i + 1; j < candidates.Count; j++)
             {
-                if (paired.Contains(j)) continue;
+                if (paired.Contains(j))
+                    continue;
                 var d = mirrorCenter.DistanceTo(candidates[j].BoundingBox.Center);
                 if (d < bestDist)
                 {
@@ -279,7 +284,8 @@ public class GeometrySimplifier
             }
 
             var matchTol = System.Math.Max(ci.BoundingBox.Width, ci.BoundingBox.Length) * 0.5;
-            if (bestJ < 0 || bestDist > matchTol) continue;
+            if (bestJ < 0 || bestDist > matchTol)
+                continue;
 
             paired.Add(i);
             paired.Add(bestJ);
@@ -287,7 +293,10 @@ public class GeometrySimplifier
             var cj = candidates[bestJ];
             var sourceIdx = i;
             var targetIdx = bestJ;
-            if (cj.LineCount > ci.LineCount || (cj.LineCount == ci.LineCount && cj.MaxDeviation < ci.MaxDeviation))
+            if (
+                cj.LineCount > ci.LineCount
+                || (cj.LineCount == ci.LineCount && cj.MaxDeviation < ci.MaxDeviation)
+            )
             {
                 sourceIdx = bestJ;
                 targetIdx = i;
@@ -323,8 +332,12 @@ public class GeometrySimplifier
         var mirrorEp = axis.Reflect(ep);
 
         // Mirroring reverses winding — swap start/end to preserve arc direction
-        var mirrorStart = NormalizeAngle(System.Math.Atan2(mirrorEp.Y - mirrorCenter.Y, mirrorEp.X - mirrorCenter.X));
+        var mirrorStart = NormalizeAngle(
-        var mirrorEnd = NormalizeAngle(System.Math.Atan2(mirrorSp.Y - mirrorCenter.Y, mirrorSp.X - mirrorCenter.X));
+            System.Math.Atan2(mirrorEp.Y - mirrorCenter.Y, mirrorEp.X - mirrorCenter.X)
+        );
+        var mirrorEnd = NormalizeAngle(
+            System.Math.Atan2(mirrorSp.Y - mirrorCenter.Y, mirrorSp.X - mirrorCenter.X)
+        );
 
         var result = new Arc(mirrorCenter, arc.Radius, mirrorStart, mirrorEnd, arc.IsReversed);
         result.Layer = arc.Layer;
@@ -332,7 +345,12 @@ public class GeometrySimplifier
         return result;
     }
 
-    private void FindCandidatesInRun(List<Entity> entities, int runStart, int runEnd, List<ArcCandidate> candidates)
+    private void FindCandidatesInRun(
+        List<Entity> entities,
+        int runStart,
+        int runEnd,
+        List<ArcCandidate> candidates
+    )
     {
         var j = runStart;
         var chainedTangent = Vector.Invalid;
@@ -349,7 +367,8 @@ public class GeometrySimplifier
 
             chainedTangent = ComputeEndTangent(result.Center, result.Points);
             var arc = CreateArc(result.Center, result.Radius, result.Points, entities[j]);
-            candidates.Add(new ArcCandidate
+            candidates.Add(
+                new ArcCandidate
                 {
                     StartIndex = j,
                     EndIndex = result.EndIndex,
@@ -358,36 +377,53 @@ public class GeometrySimplifier
                     BoundingBox = result.Points.GetBoundingBox(),
                     FirstPoint = arc.StartPoint(),
                     LastPoint = arc.EndPoint(),
-            });
+                }
+            );
 
             j = result.EndIndex + 1;
         }
     }
 
-    private record ArcFitResult(Vector Center, double Radius, double Deviation, List<Vector> Points, int EndIndex);
+    private record ArcFitResult(
+        Vector Center,
+        double Radius,
+        double Deviation,
+        List<Vector> Points,
+        int EndIndex
+    );
 
-    private ArcFitResult TryFitArcAt(List<Entity> entities, int start, int runEnd, Vector chainedTangent)
+    private ArcFitResult TryFitArcAt(
+        List<Entity> entities,
+        int start,
+        int runEnd,
+        Vector chainedTangent
+    )
     {
         var k = start + MinLines - 1;
-        if (k > runEnd) return null;
+        if (k > runEnd)
+            return null;
 
         var points = CollectPoints(entities, start, k);
-        if (points.Count < 3) return null;
+        if (points.Count < 3)
+            return null;
 
         var startTangent = EstimateStartTangent(entities, start, points, chainedTangent);
         var endTangent = EstimateEndTangent(entities, k, points);
         var (center, radius, dev) = TryFit(points, startTangent, endTangent);
-        if (!center.IsValid()) return null;
+        if (!center.IsValid())
+            return null;
 
         // Extend the arc as far as possible
         while (k + 1 <= runEnd)
         {
             var extPoints = CollectPoints(entities, start, k + 1);
-            if (extPoints.Count < 3) break;
+            if (extPoints.Count < 3)
+                break;
 
             var extEndTangent = EstimateEndTangent(entities, k + 1, extPoints);
             var (nc, nr, nd) = TryFit(extPoints, startTangent, extEndTangent);
-            if (!nc.IsValid()) break;
+            if (!nc.IsValid())
+                break;
 
             k++;
             center = nc;
@@ -407,7 +443,10 @@ public class GeometrySimplifier
     }
 
     private (Vector center, double radius, double deviation) TryFit(
-        List<Vector> points, TangentEstimate start, TangentEstimate end)
+        List<Vector> points,
+        TangentEstimate start,
+        TangentEstimate end
+    )
     {
         foreach (var (center, radius, dev) in FitAttempts(points, start, end))
         {
@@ -434,23 +473,38 @@ public class GeometrySimplifier
     /// passes exactly through both endpoints, so no gaps are introduced.
     /// </summary>
     private IEnumerable<(Vector center, double radius, double deviation)> FitAttempts(
-        List<Vector> points, TangentEstimate start, TangentEstimate end)
+        List<Vector> points,
+        TangentEstimate start,
+        TangentEstimate end
+    )
     {
         if (start.Trusted && !end.Trusted)
         {
             yield return ArcFit.FitWithStartTangent(points, start.Direction);
-            yield return ArcFit.FitThroughEndpointsWithTangents(points, start.Direction, end.Direction);
+            yield return ArcFit.FitThroughEndpointsWithTangents(
+                points,
+                start.Direction,
+                end.Direction
+            );
             yield return FitWithEndTangent(points, end.Direction);
         }
         else if (end.Trusted && !start.Trusted)
         {
             yield return FitWithEndTangent(points, end.Direction);
-            yield return ArcFit.FitThroughEndpointsWithTangents(points, start.Direction, end.Direction);
+            yield return ArcFit.FitThroughEndpointsWithTangents(
+                points,
+                start.Direction,
+                end.Direction
+            );
             yield return ArcFit.FitWithStartTangent(points, start.Direction);
         }
         else
         {
-            yield return ArcFit.FitThroughEndpointsWithTangents(points, start.Direction, end.Direction);
+            yield return ArcFit.FitThroughEndpointsWithTangents(
+                points,
+                start.Direction,
+                end.Direction
+            );
             yield return ArcFit.FitWithStartTangent(points, start.Direction);
             yield return FitWithEndTangent(points, end.Direction);
         }
@@ -463,7 +517,9 @@ public class GeometrySimplifier
     /// by running the start-tangent fit on the reversed point sequence.
     /// </summary>
     private static (Vector center, double radius, double deviation) FitWithEndTangent(
-        List<Vector> points, Vector endTangent)
+        List<Vector> points,
+        Vector endTangent
+    )
     {
         var reversed = new List<Vector>(points);
         reversed.Reverse();
@@ -483,7 +539,11 @@ public class GeometrySimplifier
     private const double NeighborEdgeFactor = 3.0;
 
     private static TangentEstimate EstimateStartTangent(
-        List<Entity> entities, int start, List<Vector> points, Vector chainedTangent)
+        List<Entity> entities,
+        int start,
+        List<Vector> points,
+        Vector chainedTangent
+    )
     {
         if (chainedTangent.IsValid())
             return new TangentEstimate(chainedTangent, true);
@@ -495,23 +555,39 @@ public class GeometrySimplifier
         if (start > 0)
         {
             var prev = entities[start - 1];
-            var prevEnd = prev switch { Line l => l.EndPoint, Arc a => a.EndPoint(), _ => Vector.Invalid };
+            var prevEnd = prev switch
+            {
+                Line l => l.EndPoint,
+                Arc a => a.EndPoint(),
+                _ => Vector.Invalid,
+            };
             if (prevEnd.IsValid() && prevEnd.DistanceTo(points[0]) < 1e-6)
             {
                 if (prev is Arc)
                     return new TangentEstimate(GetExitDirection(prev), true);
-                if (prev is Line prevLine && prevLine.StartPoint.DistanceTo(prevLine.EndPoint) >= NeighborEdgeFactor * firstChordLen)
+                if (
+                    prev is Line prevLine
+                    && prevLine.StartPoint.DistanceTo(prevLine.EndPoint)
+                        >= NeighborEdgeFactor * firstChordLen
+                )
                     return new TangentEstimate(GetExitDirection(prevLine), true);
             }
         }
 
         var chord = new Vector(points[1].X - points[0].X, points[1].Y - points[0].Y);
         if (points.Count >= 3)
-            return new TangentEstimate(EstimateVertexTangent(points[0], points[1], points[2], chord), false);
+            return new TangentEstimate(
+                EstimateVertexTangent(points[0], points[1], points[2], chord),
+                false
+            );
         return new TangentEstimate(chord, false);
     }
 
-    private static TangentEstimate EstimateEndTangent(List<Entity> entities, int k, List<Vector> points)
+    private static TangentEstimate EstimateEndTangent(
+        List<Entity> entities,
+        int k,
+        List<Vector> points
+    )
     {
         if (entities[k] is Arc endArc)
             return new TangentEstimate(GetExitDirection(endArc), true);
@@ -520,19 +596,31 @@ public class GeometrySimplifier
         if (k + 1 < entities.Count)
         {
             var next = entities[k + 1];
-            var nextStart = next switch { Line l => l.StartPoint, Arc a => a.StartPoint(), _ => Vector.Invalid };
+            var nextStart = next switch
+            {
+                Line l => l.StartPoint,
+                Arc a => a.StartPoint(),
+                _ => Vector.Invalid,
+            };
             if (nextStart.IsValid() && nextStart.DistanceTo(points[^1]) < 1e-6)
             {
                 if (next is Arc nextArc)
                     return new TangentEstimate(GetEntryDirection(nextArc), true);
-                if (next is Line nextLine && nextLine.StartPoint.DistanceTo(nextLine.EndPoint) >= NeighborEdgeFactor * lastChordLen)
+                if (
+                    next is Line nextLine
+                    && nextLine.StartPoint.DistanceTo(nextLine.EndPoint)
+                        >= NeighborEdgeFactor * lastChordLen
+                )
                     return new TangentEstimate(GetExitDirection(nextLine), true);
             }
         }
 
         var chord = new Vector(points[^1].X - points[^2].X, points[^1].Y - points[^2].Y);
         if (points.Count >= 3)
-            return new TangentEstimate(EstimateVertexTangent(points[^1], points[^2], points[^3], chord), false);
+            return new TangentEstimate(
+                EstimateVertexTangent(points[^1], points[^2], points[^3], chord),
+                false
+            );
         return new TangentEstimate(chord, false);
     }
 
@@ -563,9 +651,13 @@ public class GeometrySimplifier
     /// <summary>
     /// Returns the entry direction (tangent at start point) of an entity.
     /// </summary>
-    private static Vector GetEntryDirection(Entity entity) => entity switch
+    private static Vector GetEntryDirection(Entity entity) =>
+        entity switch
         {
-        Line line => new Vector(line.EndPoint.X - line.StartPoint.X, line.EndPoint.Y - line.StartPoint.Y),
+            Line line => new Vector(
+                line.EndPoint.X - line.StartPoint.X,
+                line.EndPoint.Y - line.StartPoint.Y
+            ),
             Arc arc => arc.IsReversed
                 ? new Vector(System.Math.Sin(arc.StartAngle), -System.Math.Cos(arc.StartAngle))
                 : new Vector(-System.Math.Sin(arc.StartAngle), System.Math.Cos(arc.StartAngle)),
@@ -622,9 +714,17 @@ public class GeometrySimplifier
         var dInit = (maxSagitta * maxSagitta - halfChord * halfChord) / (2 * maxSagitta);
         var range = System.Math.Max(System.Math.Abs(dInit) * 2, halfChord);
 
-        var dOpt = GoldenSectionMin(dInit - range, dInit + range,
+        var dOpt = GoldenSectionMin(
-            d => ArcFit.MaxRadialDeviation(points, mx + d * nx, my + d * ny,
+            dInit - range,
-                System.Math.Sqrt(halfChord * halfChord + d * d)));
+            dInit + range,
+            d =>
+                ArcFit.MaxRadialDeviation(
+                    points,
+                    mx + d * nx,
+                    my + d * ny,
+                    System.Math.Sqrt(halfChord * halfChord + d * d)
+                )
+        );
 
         var center = new Vector(mx + dOpt * nx, my + dOpt * ny);
         var radius = System.Math.Sqrt(halfChord * halfChord + dOpt * dOpt);
@@ -676,13 +776,22 @@ public class GeometrySimplifier
         return points;
     }
 
-    private static Arc CreateArc(Vector center, double radius, List<Vector> points, Entity sourceEntity)
+    private static Arc CreateArc(
+        Vector center,
+        double radius,
+        List<Vector> points,
+        Entity sourceEntity
+    )
     {
         var firstPoint = points[0];
         var lastPoint = points[^1];
 
-        var startAngle = NormalizeAngle(System.Math.Atan2(firstPoint.Y - center.Y, firstPoint.X - center.X));
+        var startAngle = NormalizeAngle(
-        var endAngle = NormalizeAngle(System.Math.Atan2(lastPoint.Y - center.Y, lastPoint.X - center.X));
+            System.Math.Atan2(firstPoint.Y - center.Y, firstPoint.X - center.X)
+        );
+        var endAngle = NormalizeAngle(
+            System.Math.Atan2(lastPoint.Y - center.Y, lastPoint.X - center.X)
+        );
         var isReversed = SumSignedAngles(center, points) < 0;
 
         var arc = new Arc(center, radius, startAngle, endAngle, isReversed);
@@ -694,9 +803,13 @@ public class GeometrySimplifier
     /// <summary>
     /// Returns the exit direction (tangent at endpoint) of an entity.
     /// </summary>
-    private static Vector GetExitDirection(Entity entity) => entity switch
+    private static Vector GetExitDirection(Entity entity) =>
+        entity switch
         {
-        Line line => new Vector(line.EndPoint.X - line.StartPoint.X, line.EndPoint.Y - line.StartPoint.Y),
+            Line line => new Vector(
+                line.EndPoint.X - line.StartPoint.X,
+                line.EndPoint.Y - line.StartPoint.Y
+            ),
             Arc arc => arc.IsReversed
                 ? new Vector(System.Math.Sin(arc.EndAngle), -System.Math.Cos(arc.EndAngle))
                 : new Vector(-System.Math.Sin(arc.EndAngle), System.Math.Cos(arc.EndAngle)),
@@ -715,8 +828,10 @@ public class GeometrySimplifier
             var a1 = System.Math.Atan2(points[i].Y - center.Y, points[i].X - center.X);
             var a2 = System.Math.Atan2(points[i + 1].Y - center.Y, points[i + 1].X - center.X);
             var da = a2 - a1;
-            while (da > System.Math.PI) da -= Angle.TwoPI;
+            while (da > System.Math.PI)
-            while (da < -System.Math.PI) da += Angle.TwoPI;
+                da -= Angle.TwoPI;
+            while (da < -System.Math.PI)
+                da += Angle.TwoPI;
             total += da;
         }
         return total;
@@ -727,7 +842,12 @@ public class GeometrySimplifier
     /// back to the original line segments. This catches cases where points lie
     /// on a large circle but the arc bulges far from the original straight geometry.
     /// </summary>
-    private static double MaxArcToSegmentDeviation(List<Vector> points, Vector center, double radius, bool isReversed)
+    private static double MaxArcToSegmentDeviation(
+        List<Vector> points,
+        Vector center,
+        double radius,
+        bool isReversed
+    )
     {
         var startAngle = System.Math.Atan2(points[0].Y - center.Y, points[0].X - center.X);
         var endAngle = System.Math.Atan2(points[^1].Y - center.Y, points[^1].X - center.X);
@@ -735,11 +855,13 @@ public class GeometrySimplifier
         var sweep = endAngle - startAngle;
         if (isReversed)
         {
-            if (sweep > 0) sweep -= Angle.TwoPI;
+            if (sweep > 0)
+                sweep -= Angle.TwoPI;
         }
         else
         {
-            if (sweep < 0) sweep += Angle.TwoPI;
+            if (sweep < 0)
+                sweep += Angle.TwoPI;
         }
 
         var sampleCount = System.Math.Max(10, (int)(System.Math.Abs(sweep) * radius * 10));
@@ -758,9 +880,11 @@ public class GeometrySimplifier
             for (var j = 0; j < points.Count - 1; j++)
             {
                 var dist = DistanceToSegment(arcPt, points[j], points[j + 1]);
-                if (dist < minDist) minDist = dist;
+                if (dist < minDist)
+                    minDist = dist;
             }
-            if (minDist > maxDev) maxDev = minDist;
+            if (minDist > maxDev)
+                maxDev = minDist;
         }
         return maxDev;
     }

OpenNest.Posts.GravographIS/GravographISPostConfig.cs

@@ -15,18 +15,23 @@ namespace OpenNest.Posts.GravographIS
         public int FeedMmPerSec { get; set; } = 10;
 
         [DisplayName("Depth (inches)")]
-        [Description("Programmed Z plunge (DZ). Note: the spring-floated spindle means this does not set actual cut depth — tool protrusion does.")]
+        [Description(
+            "Programmed Z plunge (DZ). Note: the spring-floated spindle means this does not set actual cut depth — tool protrusion does."
+        )]
         public double Depth { get; set; } = 0.25;
 
         [DisplayName("Pause Before")]
-        [Description("Stop the spindle and prompt the operator before this pass begins, so the tool can be swapped/adjusted.")]
+        [Description(
+            "Stop the spindle and prompt the operator before this pass begins, so the tool can be swapped/adjusted."
+        )]
         public bool PauseBefore { get; set; }
 
         [DisplayName("Pause Message")]
         [Description("Message shown on the controller during the pause.")]
         public string PauseMessage { get; set; } = "";
 
-        public override string ToString() => $"{FeedMmPerSec} mm/s, {Depth:0.###}\"" + (PauseBefore ? ", pause" : "");
+        public override string ToString() =>
+            $"{FeedMmPerSec} mm/s, {Depth:0.###}\"" + (PauseBefore ? ", pause" : "");
     }
 
     /// <summary>
@@ -40,7 +45,8 @@ namespace OpenNest.Posts.GravographIS
         [Category("Engrave (Scribe)")]
         [DisplayName("Engrave")]
         [Description("Parameters for engrave/scribe geometry (text).")]
-        public LayerCutConfig Engrave { get; set; } = new LayerCutConfig
+        public LayerCutConfig Engrave { get; set; } =
+            new LayerCutConfig
             {
                 FeedMmPerSec = 10,
                 Depth = 0.25,
@@ -50,8 +56,11 @@ namespace OpenNest.Posts.GravographIS
 
         [Category("Cut")]
         [DisplayName("Cut")]
-        [Description("Parameters for cut geometry (outlines). Pauses for a tool change by default.")]
+        [Description(
-        public LayerCutConfig Cut { get; set; } = new LayerCutConfig
+            "Parameters for cut geometry (outlines). Pauses for a tool change by default."
+        )]
+        public LayerCutConfig Cut { get; set; } =
+            new LayerCutConfig
             {
                 FeedMmPerSec = 3,
                 Depth = 0.25,

OpenNest.Posts.GravographIS/GravographISPostProcessor.cs

@@ -22,7 +22,7 @@ namespace OpenNest.Posts.GravographIS
         private static readonly JsonSerializerOptions JsonOptions = new()
         {
             WriteIndented = true,
-            Converters = { new JsonStringEnumConverter() }
+            Converters = { new JsonStringEnumConverter() },
         };
 
         public string Name => "Gravograph IS8000";
@@ -48,7 +48,8 @@ namespace OpenNest.Posts.GravographIS
             if (File.Exists(configPath))
             {
                 var json = File.ReadAllText(configPath);
-                Config = JsonSerializer.Deserialize<GravographISPostConfig>(json, JsonOptions)
+                Config =
+                    JsonSerializer.Deserialize<GravographISPostConfig>(json, JsonOptions)
                     ?? new GravographISPostConfig();
             }
             else
@@ -103,14 +104,16 @@ namespace OpenNest.Posts.GravographIS
         /// </summary>
         public IReadOnlyList<GravographPass> BuildPasses(IEnumerable<LayeredPolyline> polylines)
         {
-            if (polylines == null) throw new ArgumentNullException(nameof(polylines));
+            if (polylines == null)
+                throw new ArgumentNullException(nameof(polylines));
 
             var engrave = new List<IReadOnlyList<Vector>>();
             var cut = new List<IReadOnlyList<Vector>>();
 
             foreach (var poly in polylines)
             {
-                if (poly == null) continue;
+                if (poly == null)
+                    continue;
                 var block = Config.ConfigFor(poly.Layer);
                 if (block == null)
                     continue; // non-cutting (Display) geometry

OpenNest.Posts.GravographIS/GravographISWriter.cs

@@ -48,16 +48,99 @@ namespace OpenNest.Posts.GravographIS
         // fixed return-to-home block.
         private static readonly byte[] PreambleTemplate = new byte[]
         {
-            0x21, 0x41, 0x53, 0x20, 0x33, 0x38, 0x3b, 0x01, 0x90, 0x01,
+            0x21,
-            0xf4, 0x01, 0x90, 0x01, 0xf4, 0x01, 0x90, 0x01, 0xf4, 0x00,
+            0x41,
-            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x53,
-            0x00, 0x00, 0x09, 0x00, 0x00, 0x03, 0xe8, 0x05, 0x06, 0x00,
+            0x20,
-            0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xfd, 0x32, 0x44, 0x00,
+            0x33,
-            0x00, 0xff, 0xfd, 0x4d, 0x43, 0x00, 0x01, 0xff, 0xfd, 0x4f,
+            0x38,
-            0x55, 0xff, 0xfb, 0xff, 0xfd, 0x4f, 0x55, 0xff, 0xfa, 0xff,
+            0x3b,
-            0xfd, 0x50, 0x5a, 0x00, 0x00, 0xff, 0xfd, 0x56, 0x53, 0x00,
+            0x01,
-            0x23, 0xff, 0xfd, 0x56, 0x5a, 0x00, 0x23, 0xff, 0xfd, 0x44,
+            0x90,
-            0x5a, 0x01, 0xfc,
+            0x01,
+            0xf4,
+            0x01,
+            0x90,
+            0x01,
+            0xf4,
+            0x01,
+            0x90,
+            0x01,
+            0xf4,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x09,
+            0x00,
+            0x00,
+            0x03,
+            0xe8,
+            0x05,
+            0x06,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0x00,
+            0xff,
+            0xfd,
+            0x32,
+            0x44,
+            0x00,
+            0x00,
+            0xff,
+            0xfd,
+            0x4d,
+            0x43,
+            0x00,
+            0x01,
+            0xff,
+            0xfd,
+            0x4f,
+            0x55,
+            0xff,
+            0xfb,
+            0xff,
+            0xfd,
+            0x4f,
+            0x55,
+            0xff,
+            0xfa,
+            0xff,
+            0xfd,
+            0x50,
+            0x5a,
+            0x00,
+            0x00,
+            0xff,
+            0xfd,
+            0x56,
+            0x53,
+            0x00,
+            0x23,
+            0xff,
+            0xfd,
+            0x56,
+            0x5a,
+            0x00,
+            0x23,
+            0xff,
+            0xfd,
+            0x44,
+            0x5a,
+            0x01,
+            0xfc,
         };
 
         // Stripped 36-byte postamble: lift, aux off, motor off, operator beep,
@@ -73,11 +156,36 @@ namespace OpenNest.Posts.GravographIS
         // lift + PU travel to the operator-set origin before these final commands.
         private static readonly byte[] EndJobBytes = new byte[]
         {
-            0xff, 0xfd, 0x4f, 0x55, 0xff, 0xfa, // OU 0xFFFA  aux off
+            0xff,
-            0xff, 0xfd, 0x4f, 0x55, 0xff, 0xfb, // OU 0xFFFB  aux off
+            0xfd,
-            0xff, 0xfd, 0x4d, 0x43, 0x00, 0x00, // MC 0x0000  motor off
+            0x4f,
-            0xff, 0xfd, 0x4f, 0x50, 0x00, 0x00, // OP 0x0000  operator beep
+            0x55,
-            0xff, 0xfd, 0x4a, 0x46, 0x00, 0x00, // JF 0x0000  job finish
+            0xff,
+            0xfa, // OU 0xFFFA  aux off
+            0xff,
+            0xfd,
+            0x4f,
+            0x55,
+            0xff,
+            0xfb, // OU 0xFFFB  aux off
+            0xff,
+            0xfd,
+            0x4d,
+            0x43,
+            0x00,
+            0x00, // MC 0x0000  motor off
+            0xff,
+            0xfd,
+            0x4f,
+            0x50,
+            0x00,
+            0x00, // OP 0x0000  operator beep
+            0xff,
+            0xfd,
+            0x4a,
+            0x46,
+            0x00,
+            0x00, // JF 0x0000  job finish
         };
 
         // 80 steps/mm × 25.4 mm/in
@@ -86,9 +194,7 @@ namespace OpenNest.Posts.GravographIS
         public GravographISWriterOptions Options { get; }
 
         public GravographISWriter()
-            : this(new GravographISWriterOptions())
+            : this(new GravographISWriterOptions()) { }
-        {
-        }
 
         public GravographISWriter(GravographISWriterOptions options)
         {
@@ -103,11 +209,13 @@ namespace OpenNest.Posts.GravographIS
         /// </summary>
         public void Write(IEnumerable<IReadOnlyList<Vector>> polylines, Stream output)
         {
-            if (polylines == null) throw new ArgumentNullException(nameof(polylines));
+            if (polylines == null)
+                throw new ArgumentNullException(nameof(polylines));
 
             // A single pass at the configured feed/depth — byte-identical to the
             // original single-group output (no transitions, no pause).
-            Write(new[]
+            Write(
+                new[]
                 {
                     new GravographPass
                     {
@@ -117,7 +225,9 @@ namespace OpenNest.Posts.GravographIS
                         PauseBefore = false,
                         PauseMessage = "",
                     },
-            }, output);
+                },
+                output
+            );
         }
 
         /// <summary>
@@ -128,8 +238,10 @@ namespace OpenNest.Posts.GravographIS
         /// </summary>
         public void Write(IReadOnlyList<GravographPass> passes, Stream output)
         {
-            if (passes == null) throw new ArgumentNullException(nameof(passes));
+            if (passes == null)
-            if (output == null) throw new ArgumentNullException(nameof(output));
+                throw new ArgumentNullException(nameof(passes));
+            if (output == null)
+                throw new ArgumentNullException(nameof(output));
 
             var firstFeed = passes.Count > 0 ? passes[0].FeedMmPerSec : Options.FeedMmPerSec;
             var firstDepth = passes.Count > 0 ? passes[0].DepthInches : Options.DepthInches;
@@ -146,10 +258,16 @@ namespace OpenNest.Posts.GravographIS
             // catch bad records before they ship to the engraver.
             var headX = 0;
             var headY = 0;
-            var envelopeXSteps = (int)System.Math.Round(Options.WorkEnvelopeXMm * StepsPerMm,
+            var envelopeXSteps = (int)
-                MidpointRounding.AwayFromZero);
+                System.Math.Round(
-            var envelopeYSteps = (int)System.Math.Round(Options.WorkEnvelopeYMm * StepsPerMm,
+                    Options.WorkEnvelopeXMm * StepsPerMm,
-                MidpointRounding.AwayFromZero);
+                    MidpointRounding.AwayFromZero
+                );
+            var envelopeYSteps = (int)
+                System.Math.Round(
+                    Options.WorkEnvelopeYMm * StepsPerMm,
+                    MidpointRounding.AwayFromZero
+                );
 
             var firstPolyline = true;
             var polyIndex = 0;
@@ -167,9 +285,18 @@ namespace OpenNest.Posts.GravographIS
                         // Park: lift Z, then rapid (pen-up) back to the operator origin so
                         // the head is clear of the work while the tool is swapped.
                         WriteLiftOnly(output);
-                        WriteTravel(output, (byte)'P', (byte)'U',
+                        WriteTravel(
-                            checked(-headX), checked(-headY),
+                            output,
-                            ref headX, ref headY, envelopeXSteps, envelopeYSteps, polyIndex);
+                            (byte)'P',
+                            (byte)'U',
+                            checked(-headX),
+                            checked(-headY),
+                            ref headX,
+                            ref headY,
+                            envelopeXSteps,
+                            envelopeYSteps,
+                            polyIndex
+                        );
                         WritePauseCore(output, pass.PauseMessage);
                     }
 
@@ -182,12 +309,18 @@ namespace OpenNest.Posts.GravographIS
 
                     if (pass.DepthInches != currentDepth)
                     {
-                        WriteCommand(output, (byte)'D', (byte)'Z', DepthInStepsAsInt16(pass.DepthInches));
+                        WriteCommand(
+                            output,
+                            (byte)'D',
+                            (byte)'Z',
+                            DepthInStepsAsInt16(pass.DepthInches)
+                        );
                         currentDepth = pass.DepthInches;
                     }
                 }
 
-                if (pass.Polylines == null) continue;
+                if (pass.Polylines == null)
+                    continue;
 
                 foreach (var poly in pass.Polylines)
                 {
@@ -195,31 +328,62 @@ namespace OpenNest.Posts.GravographIS
                     if (poly == null || poly.Count < 2)
                         continue;
 
-                    WritePolyline(output, poly, ref firstPolyline, ref headX, ref headY,
+                    WritePolyline(
-                        envelopeXSteps, envelopeYSteps, polyIndex);
+                        output,
+                        poly,
+                        ref firstPolyline,
+                        ref headX,
+                        ref headY,
+                        envelopeXSteps,
+                        envelopeYSteps,
+                        polyIndex
+                    );
                 }
             }
 
             WriteLiftOnly(output);
             if (Options.ReturnToOriginAtEnd && !firstPolyline)
             {
-                WriteTravel(output, (byte)'P', (byte)'U',
+                WriteTravel(
-                    checked(-headX), checked(-headY),
+                    output,
-                    ref headX, ref headY, envelopeXSteps, envelopeYSteps, polyIndex);
+                    (byte)'P',
+                    (byte)'U',
+                    checked(-headX),
+                    checked(-headY),
+                    ref headX,
+                    ref headY,
+                    envelopeXSteps,
+                    envelopeYSteps,
+                    polyIndex
+                );
             }
             output.Write(EndJobBytes, 0, EndJobBytes.Length);
         }
 
-        private void WritePolyline(Stream output, IReadOnlyList<Vector> poly,
+        private void WritePolyline(
-            ref bool firstPolyline, ref int headX, ref int headY,
+            Stream output,
-            int envelopeXSteps, int envelopeYSteps, int polyIndex)
+            IReadOnlyList<Vector> poly,
+            ref bool firstPolyline,
+            ref int headX,
+            ref int headY,
+            int envelopeXSteps,
+            int envelopeYSteps,
+            int polyIndex
+        )
         {
             var (startX, startY) = ToWire(poly[0]);
-            WriteTravel(output,
+            WriteTravel(
+                output,
                 firstPolyline ? (byte)'D' : (byte)'P',
                 firstPolyline ? (byte)'R' : (byte)'U',
-                checked(startX - headX), checked(startY - headY),
+                checked(startX - headX),
-                ref headX, ref headY, envelopeXSteps, envelopeYSteps, polyIndex);
+                checked(startY - headY),
+                ref headX,
+                ref headY,
+                envelopeXSteps,
+                envelopeYSteps,
+                polyIndex
+            );
 
             // PD command + single records-follow flag, then one record per segment.
             output.WriteByte(0xFF);
@@ -236,8 +400,15 @@ namespace OpenNest.Posts.GravographIS
                 var (cx, cy) = ToWire(poly[i]);
                 var dx = checked(cx - prevX);
                 var dy = checked(cy - prevY);
-                EnsureEnvelope(headX + dx, headY + dy, envelopeXSteps, envelopeYSteps,
+                EnsureEnvelope(
-                    polyIndex, segment: i, isTravel: false);
+                    headX + dx,
+                    headY + dy,
+                    envelopeXSteps,
+                    envelopeYSteps,
+                    polyIndex,
+                    segment: i,
+                    isTravel: false
+                );
                 WriteRecord(output, dx, dy);
                 prevX = cx;
                 prevY = cy;
@@ -267,7 +438,8 @@ namespace OpenNest.Posts.GravographIS
         // space-padded to a whole number of packets so widths stay 2 bytes.
         private static void WriteMessagePackets(Stream s, string message)
         {
-            if (string.IsNullOrEmpty(message)) return;
+            if (string.IsNullOrEmpty(message))
+                return;
 
             var chars = Encoding.ASCII.GetBytes(message);
             for (var i = 0; i < chars.Length; i += 2)
@@ -295,11 +467,18 @@ namespace OpenNest.Posts.GravographIS
 
         private const double StepsPerMm = 80.0;
 
-        private void EnsureEnvelope(int wireX, int wireY,
+        private void EnsureEnvelope(
-            int envXSteps, int envYSteps,
+            int wireX,
-            int polyIndex, int segment, bool isTravel)
+            int wireY,
+            int envXSteps,
+            int envYSteps,
+            int polyIndex,
+            int segment,
+            bool isTravel
+        )
         {
-            if (!Options.EnvelopeGuardEnabled) return;
+            if (!Options.EnvelopeGuardEnabled)
+                return;
 
             // Wire frame: X is identity to input; Y is negated. With the operator
             // origin set at the upper-left of the work envelope and an OpenNest
@@ -313,16 +492,21 @@ namespace OpenNest.Posts.GravographIS
             var inputY = -wireY / (double)StepsPerInch;
             var kind = isTravel ? "pen-up travel" : "cut segment";
             throw new InvalidOperationException(
-                $"Polyline {polyIndex} {kind} (segment {segment}) would place the head at " +
+                $"Polyline {polyIndex} {kind} (segment {segment}) would place the head at "
-                $"({inputX:F3}\", {inputY:F3}\"), outside the {Options.WorkEnvelopeXMm}×{Options.WorkEnvelopeYMm} mm " +
+                    + $"({inputX:F3}\", {inputY:F3}\"), outside the {Options.WorkEnvelopeXMm}×{Options.WorkEnvelopeYMm} mm "
-                $"work envelope from upper-left origin. Refusing to emit the record.");
+                    + $"work envelope from upper-left origin. Refusing to emit the record."
+            );
         }
 
         private static short DepthInStepsAsInt16(double depthInches)
         {
-            var steps = (long)System.Math.Round(depthInches * StepsPerInch, MidpointRounding.AwayFromZero);
+            var steps = (long)
+                System.Math.Round(depthInches * StepsPerInch, MidpointRounding.AwayFromZero);
             if (steps < short.MinValue || steps > short.MaxValue)
-                throw new ArgumentOutOfRangeException(nameof(depthInches), $"Depth {depthInches} in. → {steps} steps overflows int16.");
+                throw new ArgumentOutOfRangeException(
+                    nameof(depthInches),
+                    $"Depth {depthInches} in. → {steps} steps overflows int16."
+                );
             return (short)steps;
         }
 
@@ -335,10 +519,18 @@ namespace OpenNest.Posts.GravographIS
             return (x, y);
         }
 
-        private void WriteTravel(Stream s, byte c0, byte c1, int dx, int dy,
+        private void WriteTravel(
-            ref int headX, ref int headY,
+            Stream s,
-            int envelopeXSteps, int envelopeYSteps,
+            byte c0,
-            int polyIndex)
+            byte c1,
+            int dx,
+            int dy,
+            ref int headX,
+            ref int headY,
+            int envelopeXSteps,
+            int envelopeYSteps,
+            int polyIndex
+        )
         {
             if (dx == 0 && dy == 0)
                 return;
@@ -352,20 +544,31 @@ namespace OpenNest.Posts.GravographIS
 
             var chunks = System.Math.Max(
                 (int)System.Math.Ceiling(System.Math.Abs(dx) / (double)short.MaxValue),
-                (int)System.Math.Ceiling(System.Math.Abs(dy) / (double)short.MaxValue));
+                (int)System.Math.Ceiling(System.Math.Abs(dy) / (double)short.MaxValue)
-            if (chunks < 1) chunks = 1;
+            );
+            if (chunks < 1)
+                chunks = 1;
 
             var emittedX = 0;
             var emittedY = 0;
             for (var i = 1; i <= chunks; i++)
             {
-                var targetX = (int)System.Math.Round(dx * (i / (double)chunks), MidpointRounding.AwayFromZero);
+                var targetX = (int)
-                var targetY = (int)System.Math.Round(dy * (i / (double)chunks), MidpointRounding.AwayFromZero);
+                    System.Math.Round(dx * (i / (double)chunks), MidpointRounding.AwayFromZero);
+                var targetY = (int)
+                    System.Math.Round(dy * (i / (double)chunks), MidpointRounding.AwayFromZero);
                 var chunkX = checked(targetX - emittedX);
                 var chunkY = checked(targetY - emittedY);
 
-                EnsureEnvelope(headX + chunkX, headY + chunkY, envelopeXSteps, envelopeYSteps,
+                EnsureEnvelope(
-                    polyIndex, segment: 0, isTravel: true);
+                    headX + chunkX,
+                    headY + chunkY,
+                    envelopeXSteps,
+                    envelopeYSteps,
+                    polyIndex,
+                    segment: 0,
+                    isTravel: true
+                );
                 WriteRecord(s, chunkX, chunkY);
 
                 emittedX = targetX;
@@ -399,11 +602,16 @@ namespace OpenNest.Posts.GravographIS
 
         private static void WriteRecord(Stream s, int dx, int dy)
         {
-            if (dx < short.MinValue || dx > short.MaxValue ||
+            if (
-                dy < short.MinValue || dy > short.MaxValue)
+                dx < short.MinValue
+                || dx > short.MaxValue
+                || dy < short.MinValue
+                || dy > short.MaxValue
+            )
             {
                 throw new InvalidOperationException(
-                    $"Move delta ({dx}, {dy}) steps overflows signed int16 — split moves upstream.");
+                    $"Move delta ({dx}, {dy}) steps overflows signed int16 — split moves upstream."
+                );
             }
 
             int word1;
@@ -423,11 +631,15 @@ namespace OpenNest.Posts.GravographIS
             else
             {
                 var maxAbs = System.Math.Max(absDx, absDy);
-                word1 = (int)System.Math.Round(16384.0 * maxAbs / len, MidpointRounding.AwayFromZero);
+                word1 = (int)
+                    System.Math.Round(16384.0 * maxAbs / len, MidpointRounding.AwayFromZero);
                 param = (int)System.Math.Round(len / 22.4, MidpointRounding.AwayFromZero);
-                if (param < 1) param = 1;
+                if (param < 1)
-                if (param > 180) param = 180;
+                    param = 1;
-                if (word1 > 16384) word1 = 16384;
+                if (param > 180)
+                    param = 180;
+                if (word1 > 16384)
+                    word1 = 16384;
             }
 
             WriteBigEndianInt16(s, (short)word1);
@@ -448,8 +660,12 @@ namespace OpenNest.Posts.GravographIS
         {
             for (int i = 0; i <= buffer.Length - 6; i++)
             {
-                if (buffer[i] == 0xFF && buffer[i + 1] == 0xFD &&
+                if (
-                    buffer[i + 2] == c0 && buffer[i + 3] == c1)
+                    buffer[i] == 0xFF
+                    && buffer[i + 1] == 0xFD
+                    && buffer[i + 2] == c0
+                    && buffer[i + 3] == c1
+                )
                 {
                     buffer[i + 4] = (byte)((value >> 8) & 0xFF);
                     buffer[i + 5] = (byte)(value & 0xFF);
@@ -458,7 +674,8 @@ namespace OpenNest.Posts.GravographIS
             }
 
             throw new InvalidOperationException(
-                $"Command '{(char)c0}{(char)c1}' not found in preamble template.");
+                $"Command '{(char)c0}{(char)c1}' not found in preamble template."
+            );
         }
     }
 }

OpenNest.Posts.GravographIS/NestPolylineExtractor.cs

@@ -59,7 +59,8 @@ namespace OpenNest.Posts.GravographIS
         /// </summary>
         public List<LayeredPolyline> ExtractLayered(Nest nest)
         {
-            if (nest == null) throw new ArgumentNullException(nameof(nest));
+            if (nest == null)
+                throw new ArgumentNullException(nameof(nest));
 
             var result = new List<LayeredPolyline>();
 
@@ -91,7 +92,8 @@ namespace OpenNest.Posts.GravographIS
         private void ExtractPart(Part part, List<LayeredPolyline> sink)
         {
             var program = part.Program;
-            if (program == null) return;
+            if (program == null)
+                return;
 
             // The walk below treats Motion.EndPoint as absolute. Convert a working
             // copy to absolute mode so G91 programs (the form OpenNest's UI writes)
@@ -123,7 +125,13 @@ namespace OpenNest.Posts.GravographIS
 
                     case LinearMove linear:
                     {
-                        StartOrSplit(sink, ref current, ref currentLayer, linear.Layer, pos + offset);
+                        StartOrSplit(
+                            sink,
+                            ref current,
+                            ref currentLayer,
+                            linear.Layer,
+                            pos + offset
+                        );
                         var end = linear.EndPoint;
                         current.Add(end + offset);
                         pos = end;
@@ -147,8 +155,13 @@ namespace OpenNest.Posts.GravographIS
         // seeded at `seed` (the current pen position). When the layer changes
         // mid-chain the previous polyline is flushed and a new one begins at the
         // shared seam vertex so engrave and cut passes stay geometrically continuous.
-        private static void StartOrSplit(List<LayeredPolyline> sink, ref List<Vector> current,
+        private static void StartOrSplit(
-            ref LayerType currentLayer, LayerType moveLayer, Vector seed)
+            List<LayeredPolyline> sink,
+            ref List<Vector> current,
+            ref LayerType currentLayer,
+            LayerType moveLayer,
+            Vector seed
+        )
         {
             if (current == null)
             {
@@ -163,7 +176,11 @@ namespace OpenNest.Posts.GravographIS
             }
         }
 
-        private static void FlushCurrent(List<LayeredPolyline> sink, ref List<Vector> current, LayerType layer)
+        private static void FlushCurrent(
+            List<LayeredPolyline> sink,
+            ref List<Vector> current,
+            LayerType layer
+        )
         {
             if (current != null && current.Count >= 2)
                 sink.Add(new LayeredPolyline(current, layer));
@@ -175,8 +192,13 @@ namespace OpenNest.Posts.GravographIS
         // (G-code I/J in this codebase are stored as the absolute center), arc.EndPoint
         // is absolute end. The starting point is assumed to already be in the polyline;
         // intermediate samples and the endpoint are appended.
-        private static void TessellateArc(Vector start, ArcMove arc, Vector offset,
+        private static void TessellateArc(
-            double chordTol, List<Vector> sink)
+            Vector start,
+            ArcMove arc,
+            Vector offset,
+            double chordTol,
+            List<Vector> sink
+        )
         {
             var c = arc.CenterPoint;
             var r = c.DistanceTo(start);
@@ -193,18 +215,22 @@ namespace OpenNest.Posts.GravographIS
             if (arc.Rotation == RotationType.CW)
             {
                 sweep = a0 - a1;
-                if (sweep <= 0) sweep += 2 * System.Math.PI;
+                if (sweep <= 0)
+                    sweep += 2 * System.Math.PI;
             }
             else
             {
                 sweep = a1 - a0;
-                if (sweep <= 0) sweep += 2 * System.Math.PI;
+                if (sweep <= 0)
+                    sweep += 2 * System.Math.PI;
             }
 
             // Treat a near-zero sweep with coincident start/end as a full circle.
-            if (sweep < 1e-9 &&
+            if (
-                System.Math.Abs(start.X - arc.EndPoint.X) < 1e-9 &&
+                sweep < 1e-9
-                System.Math.Abs(start.Y - arc.EndPoint.Y) < 1e-9)
+                && System.Math.Abs(start.X - arc.EndPoint.X) < 1e-9
+                && System.Math.Abs(start.Y - arc.EndPoint.Y) < 1e-9
+            )
             {
                 sweep = 2 * System.Math.PI;
             }
@@ -215,7 +241,8 @@ namespace OpenNest.Posts.GravographIS
                 maxAngleStep = System.Math.PI / 32;
 
             var steps = (int)System.Math.Ceiling(sweep / maxAngleStep);
-            if (steps < 1) steps = 1;
+            if (steps < 1)
+                steps = 1;
 
             var direction = arc.Rotation == RotationType.CW ? -1.0 : 1.0;
             for (int i = 1; i < steps; i++)

OpenNest.Tests/Converters/ConvertGeometryLayerTests.cs

@@ -37,7 +37,10 @@ public class ConvertGeometryLayerTests
     [Fact]
     public void AddArc_EngraveLayer_TagsScribe()
     {
-        var arc = new Arc(new Vector(0, 0), 1, 0, System.Math.PI / 2) { Layer = new Layer("ENGRAVE") };
+        var arc = new Arc(new Vector(0, 0), 1, 0, System.Math.PI / 2)
+        {
+            Layer = new Layer("ENGRAVE"),
+        };
 
         var pgm = ProgramFor(arc);
 

OpenNest.Tests/Geometry/GeometrySimplifierTests.cs

@@ -166,8 +166,14 @@ public class GeometrySimplifierTests
         // Arc must be tangent to the adjacent straight edges at its endpoints
         var startDelta = AngleBetweenDeg(ArcTangentAt(arc, arc.StartPoint()), new Vector(1, 0));
         var endDelta = AngleBetweenDeg(ArcTangentAt(arc, arc.EndPoint()), new Vector(0, 1));
-        Assert.True(startDelta < 0.3, $"Arc start not tangent to incoming line: off by {startDelta:F3} deg");
+        Assert.True(
-        Assert.True(endDelta < 0.3, $"Arc end not tangent to outgoing line: off by {endDelta:F3} deg");
+            startDelta < 0.3,
+            $"Arc start not tangent to incoming line: off by {startDelta:F3} deg"
+        );
+        Assert.True(
+            endDelta < 0.3,
+            $"Arc end not tangent to outgoing line: off by {endDelta:F3} deg"
+        );
     }
 
     [Fact]
@@ -184,7 +190,12 @@ public class GeometrySimplifierTests
         {
             var ang = OpenNest.Math.Angle.ToRadians(10 * i);
             var radius = r1 + deltas1[i];
-            pts.Add(new Vector(c1.X + radius * System.Math.Cos(ang), c1.Y + radius * System.Math.Sin(ang)));
+            pts.Add(
+                new Vector(
+                    c1.X + radius * System.Math.Cos(ang),
+                    c1.Y + radius * System.Math.Sin(ang)
+                )
+            );
         }
 
         // Second arc center along the junction radius so tangents match at the junction
@@ -197,7 +208,12 @@ public class GeometrySimplifierTests
         {
             var ang = OpenNest.Math.Angle.ToRadians(60 + 8 * i);
             var radius = r2 + deltas2[i];
-            pts.Add(new Vector(c2.X + radius * System.Math.Cos(ang), c2.Y + radius * System.Math.Sin(ang)));
+            pts.Add(
+                new Vector(
+                    c2.X + radius * System.Math.Cos(ang),
+                    c2.Y + radius * System.Math.Sin(ang)
+                )
+            );
         }
 
         var shape = new Shape();
@@ -215,8 +231,14 @@ public class GeometrySimplifierTests
         Assert.True(arcA.EndPoint().DistanceTo(arcB.StartPoint()) < 1e-6);
 
         // Tangent continuity across the junction
-        var junctionDelta = AngleBetweenDeg(ArcTangentAt(arcA, arcA.EndPoint()), ArcTangentAt(arcB, arcB.StartPoint()));
+        var junctionDelta = AngleBetweenDeg(
-        Assert.True(junctionDelta < 0.3, $"Tangent break of {junctionDelta:F3} deg at arc-arc junction");
+            ArcTangentAt(arcA, arcA.EndPoint()),
+            ArcTangentAt(arcB, arcB.StartPoint())
+        );
+        Assert.True(
+            junctionDelta < 0.3,
+            $"Tangent break of {junctionDelta:F3} deg at arc-arc junction"
+        );
     }
 
     private static Vector ArcTangentAt(Arc arc, Vector pt)

OpenNest.Tests/GravographIS/GravographISPostProcessorTests.cs

@@ -7,19 +7,21 @@ namespace OpenNest.Tests.GravographIS;
 
 public class GravographISPostProcessorTests
 {
-    private static LayeredPolyline Poly(LayerType layer, params Vector[] pts)
+    private static LayeredPolyline Poly(LayerType layer, params Vector[] pts) =>
-        => new LayeredPolyline(new List<Vector>(pts), layer);
+        new LayeredPolyline(new List<Vector>(pts), layer);
 
     [Fact]
     public void BuildPasses_EngraveAndCut_OrdersEngraveFirstThenCutWithPause()
     {
         var post = new GravographISPostProcessor();
 
-        var passes = post.BuildPasses(new[]
+        var passes = post.BuildPasses(
+            new[]
             {
                 Poly(LayerType.Cut, new Vector(0, 0), new Vector(1, 0)),
                 Poly(LayerType.Scribe, new Vector(0, 0), new Vector(0, 1)),
-        });
+            }
+        );
 
         Assert.Equal(2, passes.Count);
 
@@ -36,10 +38,9 @@ public class GravographISPostProcessorTests
     {
         var post = new GravographISPostProcessor();
 
-        var passes = post.BuildPasses(new[]
+        var passes = post.BuildPasses(
-        {
+            new[] { Poly(LayerType.Cut, new Vector(0, 0), new Vector(1, 0)) }
-            Poly(LayerType.Cut, new Vector(0, 0), new Vector(1, 0)),
+        );
-        });
 
         Assert.Single(passes);
         Assert.Equal(post.Config.Cut.FeedMmPerSec, passes[0].FeedMmPerSec);
@@ -50,11 +51,13 @@ public class GravographISPostProcessorTests
     {
         var post = new GravographISPostProcessor();
 
-        var passes = post.BuildPasses(new[]
+        var passes = post.BuildPasses(
+            new[]
             {
                 Poly(LayerType.Display, new Vector(0, 0), new Vector(1, 0)),
                 Poly(LayerType.Cut, new Vector(0, 0), new Vector(0, 1)),
-        });
+            }
+        );
 
         Assert.Single(passes);
         Assert.Equal(post.Config.Cut.FeedMmPerSec, passes[0].FeedMmPerSec);

OpenNest.Tests/GravographIS/GravographISWriterTests.cs

@@ -191,20 +191,37 @@ public class GravographISWriterTests
     [Fact]
     public void Passes_PauseBeforeCut_EmitsPauseSequenceBetweenGroups()
     {
-        var engrave = new List<IReadOnlyList<Vector>> { new[] { new Vector(0, 0), new Vector(1, 0) } };
+        var engrave = new List<IReadOnlyList<Vector>>
+        {
+            new[] { new Vector(0, 0), new Vector(1, 0) },
+        };
         var cut = new List<IReadOnlyList<Vector>> { new[] { new Vector(0, 0), new Vector(0, -1) } };
         var passes = new List<GravographPass>
         {
-            new GravographPass { Polylines = engrave, FeedMmPerSec = 10, DepthInches = 0.25 },
+            new GravographPass
-            new GravographPass { Polylines = cut, FeedMmPerSec = 3, DepthInches = 0.25, PauseBefore = true, PauseMessage = "Hi" },
+            {
+                Polylines = engrave,
+                FeedMmPerSec = 10,
+                DepthInches = 0.25,
+            },
+            new GravographPass
+            {
+                Polylines = cut,
+                FeedMmPerSec = 3,
+                DepthInches = 0.25,
+                PauseBefore = true,
+                PauseMessage = "Hi",
+            },
         };
 
         using var ms = new MemoryStream();
-        new GravographISWriter(new GravographISWriterOptions
+        new GravographISWriter(
+            new GravographISWriterOptions
             {
                 EnvelopeGuardEnabled = false,
                 ReturnToOriginAtEnd = false,
-        }).Write(passes, ms);
+            }
+        ).Write(passes, ms);
         var bytes = ms.ToArray();
 
         var mcOff = IndexOf(bytes, 0, (byte)'M', (byte)'C', 0x00, 0x00);
@@ -217,9 +234,16 @@ public class GravographISWriterTests
         var mcOn = IndexOf(bytes, lbEnd, (byte)'M', (byte)'C', 0x00, 0x01);
 
         Assert.True(mcOff >= 0, "motor-off (MC 0000) not found");
-        Assert.True(mcOff < ouFb && ouFb < ouFa && ouFa < lbBegin && lbBegin < lbMsg
+        Assert.True(
-            && lbMsg < nr && nr < lbEnd && lbEnd < mcOn,
+            mcOff < ouFb
-            "pause commands out of order");
+                && ouFb < ouFa
+                && ouFa < lbBegin
+                && lbBegin < lbMsg
+                && lbMsg < nr
+                && nr < lbEnd
+                && lbEnd < mcOn,
+            "pause commands out of order"
+        );
 
         // Resume sets the cut feed inline (VS 0x0003) after the motor restarts.
         var vsCut = IndexOf(bytes, mcOn, (byte)'V', (byte)'S', 0x00, 0x03);
@@ -231,12 +255,34 @@ public class GravographISWriterTests
     {
         var passes = new List<GravographPass>
         {
-            new GravographPass { Polylines = new List<IReadOnlyList<Vector>> { new[] { new Vector(0, 0), new Vector(1, 0) } }, FeedMmPerSec = 10 },
+            new GravographPass
-            new GravographPass { Polylines = new List<IReadOnlyList<Vector>> { new[] { new Vector(0, 0), new Vector(0, -1) } }, FeedMmPerSec = 3, PauseBefore = true, PauseMessage = "abc" },
+            {
+                Polylines = new List<IReadOnlyList<Vector>>
+                {
+                    new[] { new Vector(0, 0), new Vector(1, 0) },
+                },
+                FeedMmPerSec = 10,
+            },
+            new GravographPass
+            {
+                Polylines = new List<IReadOnlyList<Vector>>
+                {
+                    new[] { new Vector(0, 0), new Vector(0, -1) },
+                },
+                FeedMmPerSec = 3,
+                PauseBefore = true,
+                PauseMessage = "abc",
+            },
         };
 
         using var ms = new MemoryStream();
-        new GravographISWriter(new GravographISWriterOptions { EnvelopeGuardEnabled = false, ReturnToOriginAtEnd = false }).Write(passes, ms);
+        new GravographISWriter(
+            new GravographISWriterOptions
+            {
+                EnvelopeGuardEnabled = false,
+                ReturnToOriginAtEnd = false,
+            }
+        ).Write(passes, ms);
         var bytes = ms.ToArray();
 
         var lbAb = IndexOf(bytes, 0, (byte)'L', (byte)'B', (byte)'a', (byte)'b');
@@ -250,24 +296,57 @@ public class GravographISWriterTests
     {
         var passes = new List<GravographPass>
         {
-            new GravographPass { Polylines = new List<IReadOnlyList<Vector>> { new[] { new Vector(0, 0), new Vector(1, 0) } }, FeedMmPerSec = 10 },
+            new GravographPass
-            new GravographPass { Polylines = new List<IReadOnlyList<Vector>> { new[] { new Vector(0, 0), new Vector(0, -1) } }, FeedMmPerSec = 3, PauseBefore = false },
+            {
+                Polylines = new List<IReadOnlyList<Vector>>
+                {
+                    new[] { new Vector(0, 0), new Vector(1, 0) },
+                },
+                FeedMmPerSec = 10,
+            },
+            new GravographPass
+            {
+                Polylines = new List<IReadOnlyList<Vector>>
+                {
+                    new[] { new Vector(0, 0), new Vector(0, -1) },
+                },
+                FeedMmPerSec = 3,
+                PauseBefore = false,
+            },
         };
 
         using var ms = new MemoryStream();
-        new GravographISWriter(new GravographISWriterOptions { EnvelopeGuardEnabled = false, ReturnToOriginAtEnd = false }).Write(passes, ms);
+        new GravographISWriter(
+            new GravographISWriterOptions
+            {
+                EnvelopeGuardEnabled = false,
+                ReturnToOriginAtEnd = false,
+            }
+        ).Write(passes, ms);
         var bytes = ms.ToArray();
 
-        Assert.True(IndexOf(bytes, 0, (byte)'V', (byte)'S', 0x00, 0x03) >= 0, "inline cut feed change missing");
+        Assert.True(
-        Assert.True(IndexOfCmd(bytes, (byte)'L', (byte)'B') < 0, "no LB message expected without a pause");
+            IndexOf(bytes, 0, (byte)'V', (byte)'S', 0x00, 0x03) >= 0,
+            "inline cut feed change missing"
+        );
+        Assert.True(
+            IndexOfCmd(bytes, (byte)'L', (byte)'B') < 0,
+            "no LB message expected without a pause"
+        );
     }
 
     private static int IndexOf(byte[] bytes, int from, byte c0, byte c1, byte hi, byte lo)
     {
         for (var i = System.Math.Max(0, from); i <= bytes.Length - 6; i++)
         {
-            if (bytes[i] == 0xFF && bytes[i + 1] == 0xFD && bytes[i + 2] == c0 &&
+            if (
-                bytes[i + 3] == c1 && bytes[i + 4] == hi && bytes[i + 5] == lo)
+                bytes[i] == 0xFF
+                && bytes[i + 1] == 0xFD
+                && bytes[i + 2] == c0
+                && bytes[i + 3] == c1
+                && bytes[i + 4] == hi
+                && bytes[i + 5] == lo
+            )
                 return i;
         }
         return -1;
@@ -277,7 +356,12 @@ public class GravographISWriterTests
     {
         for (var i = 0; i <= bytes.Length - 4; i++)
         {
-            if (bytes[i] == 0xFF && bytes[i + 1] == 0xFD && bytes[i + 2] == c0 && bytes[i + 3] == c1)
+            if (
+                bytes[i] == 0xFF
+                && bytes[i + 1] == 0xFD
+                && bytes[i + 2] == c0
+                && bytes[i + 3] == c1
+            )
                 return i;
         }
         return -1;

OpenNest.Tests/GravographIS/NestPolylineExtractorTests.cs

@@ -55,10 +55,16 @@ public class NestPolylineExtractorTests
         Assert.Equal(2, polylines.Count);
 
         Assert.Equal(LayerType.Scribe, polylines[0].Layer);
-        Assert.Equal(new[] { new Vector(0, 0), new Vector(1, 0), new Vector(2, 0) }, polylines[0].Points);
+        Assert.Equal(
+            new[] { new Vector(0, 0), new Vector(1, 0), new Vector(2, 0) },
+            polylines[0].Points
+        );
 
         Assert.Equal(LayerType.Cut, polylines[1].Layer);
-        Assert.Equal(new[] { new Vector(2, 0), new Vector(2, 1), new Vector(3, 1) }, polylines[1].Points);
+        Assert.Equal(
+            new[] { new Vector(2, 0), new Vector(2, 1), new Vector(3, 1) },
+            polylines[1].Points
+        );
     }
 
     [Fact]