feat: Create Open CASCADE shapes for sketch geometry

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

src/ApplicationController.cpp

@@ -13,6 +13,13 @@
 #include "SketchCircle.h"
 #include "MainWindow.h"
 
+#include <BRepBuilderAPI_MakeEdge.hxx>
+#include <BRepBuilderAPI_MakeWire.hxx>
+#include <GC_MakeSegment.hxx>
+#include <gp_Ax2.hxx>
+#include <gp_Circ.hxx>
+#include <gp_Dir.hxx>
+
 #include <QInputDialog>
 #include <QFileDialog>
 #include <QMessageBox>
@@ -146,6 +153,10 @@ void ApplicationController::addLine(const gp_Pnt& start, const gp_Pnt& end)
 {
     if (m_activeSketch) {
         m_activeSketch->addObject(new SketchLine(start, end));
+
+        Handle(Geom_TrimmedCurve) segment = GC_MakeSegment(start, end);
+        TopoDS_Edge edge = BRepBuilderAPI_MakeEdge(segment);
+        m_activeSketch->addShape(edge);
     }
 }
 
@@ -153,6 +164,29 @@ void ApplicationController::addRectangle(const gp_Pnt& corner1, const gp_Pnt& co
 {
     if (m_activeSketch) {
         m_activeSketch->addObject(new SketchRectangle(corner1, corner2));
+
+        gp_Pnt c2, c4;
+        auto plane = m_activeSketch->plane();
+        if (plane == SketchFeature::SketchPlane::XY) {
+            c2.SetX(corner2.X()); c2.SetY(corner1.Y()); c2.SetZ(corner1.Z());
+            c4.SetX(corner1.X()); c4.SetY(corner2.Y()); c4.SetZ(corner1.Z());
+        } else if (plane == SketchFeature::SketchPlane::XZ) {
+            c2.SetX(corner2.X()); c2.SetY(corner1.Y()); c2.SetZ(corner1.Z());
+            c4.SetX(corner1.X()); c4.SetY(corner1.Y()); c4.SetZ(corner2.Z());
+        } else { // YZ
+            c2.SetX(corner1.X()); c2.SetY(corner2.Y()); c2.SetZ(corner1.Z());
+            c4.SetX(corner1.X()); c4.SetY(corner1.Y()); c4.SetZ(corner2.Z());
+        }
+
+        TopoDS_Edge e1 = BRepBuilderAPI_MakeEdge(corner1, c2);
+        TopoDS_Edge e2 = BRepBuilderAPI_MakeEdge(c2, corner2);
+        TopoDS_Edge e3 = BRepBuilderAPI_MakeEdge(corner2, c4);
+        TopoDS_Edge e4 = BRepBuilderAPI_MakeEdge(c4, corner1);
+
+        BRepBuilderAPI_MakeWire wireMaker(e1, e2, e3, e4);
+        if (wireMaker.IsDone()) {
+            m_activeSketch->addShape(wireMaker.Wire());
+        }
     }
 }
 
@@ -160,6 +194,20 @@ void ApplicationController::addCircle(const gp_Pnt& center, double radius)
 {
     if (m_activeSketch) {
         m_activeSketch->addObject(new SketchCircle(center, radius));
+
+        gp_Ax2 axis;
+        auto plane = m_activeSketch->plane();
+        if (plane == SketchFeature::SketchPlane::XY) {
+            axis = gp_Ax2(center, gp::DZ());
+        } else if (plane == SketchFeature::SketchPlane::XZ) {
+            axis = gp_Ax2(center, gp::DY());
+        } else { // YZ
+            axis = gp_Ax2(center, gp::DX());
+        }
+
+        gp_Circ circle(axis, radius);
+        TopoDS_Edge edge = BRepBuilderAPI_MakeEdge(circle);
+        m_activeSketch->addShape(edge);
     }
 }
 

src/SketchFeature.cpp

@@ -10,11 +10,18 @@
 #include "SketchLine.h"
 #include "SketchRectangle.h"
 
+#include <BRep_Builder.hxx>
+#include <TopoDS_Compound.hxx>
+
 #include <QJsonArray>
 
 SketchFeature::SketchFeature(const QString& name)
     : Feature(name)
 {
+    BRep_Builder builder;
+    TopoDS_Compound compound;
+    builder.MakeCompound(compound);
+    m_shape = compound;
 }
 
 SketchFeature::~SketchFeature()
@@ -42,6 +49,12 @@ const TopoDS_Shape& SketchFeature::shape() const
     return m_shape;
 }
 
+void SketchFeature::addShape(const TopoDS_Shape& shape)
+{
+    BRep_Builder builder;
+    builder.Add(m_shape, shape);
+}
+
 void SketchFeature::addObject(SketchObject* object)
 {
     m_objects.append(object);

src/SketchFeature.h

@@ -32,6 +32,7 @@ public:
     SketchPlane plane() const;
 
     const TopoDS_Shape& shape() const;
+    void addShape(const TopoDS_Shape& shape);
 
     void addObject(SketchObject* object);
     const QList<SketchObject*>& objects() const;