fix: Improve face creation from edges using BRepOffsetAPI_MakeFilling

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

src/SketchFeature.cpp

@@ -15,8 +15,11 @@
 #include <TopExp_Explorer.hxx>
 #include <ShapeAnalysis_FreeBounds.hxx>
 #include <gp_Pln.hxx>
+#include <BRepOffsetAPI_MakeFilling.hxx>
+#include <GeomAbs_Shape.hxx>
 
 #include <QJsonArray>
+#include <QDebug>
 
 SketchFeature::SketchFeature(const QString& name)
     : Feature(name)
@@ -122,26 +125,28 @@ void SketchFeature::buildShape()
     }
 
     if (!lineEdges.isEmpty()) {
-        TopoDS_Compound compound;
-        BRep_Builder builder;
-        builder.MakeCompound(compound);
-        for (const auto& edge : lineEdges) {
-            builder.Add(compound, edge);
+        qDebug() << "buildShape: processing" << lineEdges.size() << "line edges";
+
+        BRepOffsetAPI_MakeFilling faceMaker;
+        for (const TopoDS_Edge& edge : lineEdges) {
+            faceMaker.Add(edge, GeomAbs_C0);
         }
+        faceMaker.Build();
 
-        ShapeAnalysis_FreeBounds freeBounds(compound, 1e-6, Standard_True);
-        TopoDS_Compound closedWires = freeBounds.GetClosedWires();
-
-        TopExp_Explorer explorer(closedWires, TopAbs_WIRE);
-        for (; explorer.More(); explorer.Next()) {
-            TopoDS_Wire wire = TopoDS::Wire(explorer.Current());
-            BRepBuilderAPI_MakeFace faceBuilder(sketchPlane, wire);
-            if (faceBuilder.IsDone()) {
-                faces.append(faceBuilder.Face());
+        if (faceMaker.IsDone()) {
+            TopExp_Explorer explorer(faceMaker.Shape(), TopAbs_FACE);
+            int facesAdded = 0;
+            for (; explorer.More(); explorer.Next()) {
+                faces.append(TopoDS::Face(explorer.Current()));
+                facesAdded++;
             }
+            qDebug() << "buildShape: added" << facesAdded << "face(s) using MakeFilling";
+        } else {
+            qDebug() << "buildShape: MakeFilling failed";
         }
     }
 
+    qDebug() << "buildShape: total faces created:" << faces.size();
     if (faces.isEmpty()) {
         return;
     }