Surface: add command to create surface from sections

src/Mod/Surface/App/AppSurface.cpp

@@ -33,6 +33,7 @@
 #include "FeatureCut.h"
 #include "FeatureGeomFillSurface.h"
 #include "FeatureExtend.h"
+#include "FeatureSections.h"
 
 #include <Base/Interpreter.h>
 #include <Base/Parameter.h>
@@ -80,6 +81,7 @@ PyMOD_INIT_FUNC(Surface)
     Surface::Cut             ::init();
     Surface::GeomFillSurface ::init();
     Surface::Extend          ::init();
+    Surface::Sections        ::init();
 
     PyMOD_Return(mod);
 }

src/Mod/Surface/App/CMakeLists.txt

@@ -27,6 +27,8 @@ SET(Surface_SRCS
     FeatureGeomFillSurface.h
     FeatureFilling.cpp
     FeatureFilling.h
+    FeatureSections.cpp
+    FeatureSections.h
     FeatureSewing.cpp
     FeatureSewing.h
     FeatureCut.cpp

src/Mod/Surface/App/FeatureSections.cpp

@@ -0,0 +1,103 @@
+/***************************************************************************
+ *   Copyright (c) 2020 Werner Mayer <wmayer[at]users.sourceforge.net>     *
+ *                                                                         *
+ *   This file is part of the FreeCAD CAx development system.              *
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License as published by the Free Software Foundation; either          *
+ *   version 2 of the License, or (at your option) any later version.      *
+ *                                                                         *
+ *   This library  is distributed in the hope that it will be useful,      *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU Library General Public License for more details.                  *
+ *                                                                         *
+ *   You should have received a copy of the GNU Library General Public     *
+ *   License along with this library; see the file COPYING.LIB. If not,    *
+ *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
+ *   Suite 330, Boston, MA  02111-1307, USA                                *
+ *                                                                         *
+ ***************************************************************************/
+
+#include "PreCompiled.h"
+#ifndef _PreComp_
+#include <BRepAdaptor_Curve.hxx>
+#include <BRepBuilderAPI_MakeFace.hxx>
+#include <Geom_BSplineSurface.hxx>
+#include <Geom_TrimmedCurve.hxx>
+#include <GeomAdaptor_Curve.hxx>
+#include <GeomFill_NSections.hxx>
+#include <TopLoc_Location.hxx>
+#include <TopoDS.hxx>
+#include <TopoDS_Face.hxx>
+#include <Precision.hxx>
+#include <Standard_Version.hxx>
+#endif
+
+#include "FeatureSections.h"
+#include <Base/Tools.h>
+#include <Base/Exception.h>
+
+using namespace Surface;
+
+PROPERTY_SOURCE(Surface::Sections, Part::Spline)
+
+Sections::Sections()
+{
+    ADD_PROPERTY_TYPE(NSections,(nullptr), "Sections", App::Prop_None, "Section curves");
+    NSections.setScope(App::LinkScope::Global);
+}
+
+Sections::~Sections()
+{
+}
+
+App::DocumentObjectExecReturn *Sections::execute(void)
+{
+    TColGeom_SequenceOfCurve curveSeq;
+    auto edge_obj = NSections.getValues();
+    auto edge_sub = NSections.getSubValues();
+    if (edge_obj.size() == edge_sub.size()) {
+        for (std::size_t index = 0; index < edge_obj.size(); index++) {
+            // get the part object
+            App::DocumentObject* obj = edge_obj[index];
+            const std::string& sub = edge_sub[index];
+            if (obj && obj->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId())) {
+                // get the sub-edge of the part's shape
+                const Part::TopoShape& shape = static_cast<Part::Feature*>(obj)->Shape.getShape();
+                TopoDS_Shape edge = shape.getSubShape(sub.c_str());
+                if (!edge.IsNull() && edge.ShapeType() == TopAbs_EDGE) {
+                    BRepAdaptor_Curve curve_adapt(TopoDS::Edge(edge));
+                    const TopLoc_Location& loc = edge.Location();
+                    Handle(Geom_TrimmedCurve) hCurve = new Geom_TrimmedCurve(curve_adapt.Curve().Curve(),
+                                                                             curve_adapt.FirstParameter(),
+                                                                             curve_adapt.LastParameter());
+                    if (!loc.IsIdentity()) {
+                        hCurve->Transform(loc.Transformation());
+                    }
+                    curveSeq.Append(hCurve);
+                }
+            }
+        }
+    }
+
+    if (curveSeq.Length() < 2)
+        return new App::DocumentObjectExecReturn("At least two sections are required.");
+
+    GeomFill_NSections fillOp(curveSeq);
+    fillOp.ComputeSurface();
+
+    Handle(Geom_BSplineSurface) aSurf = fillOp.BSplineSurface();
+    if (aSurf.IsNull())
+        return new App::DocumentObjectExecReturn("Failed to create surface from sections.");
+
+    BRepBuilderAPI_MakeFace mkFace(aSurf
+#if OCC_VERSION_HEX >= 0x060502
+      , Precision::Confusion()
+#endif
+    );
+
+    Shape.setValue(mkFace.Face());
+    return StdReturn;
+}

src/Mod/Surface/App/FeatureSections.h

@@ -0,0 +1,54 @@
+/***************************************************************************
+ *   Copyright (c) 2020 Werner Mayer <wmayer[at]users.sourceforge.net>     *
+ *                                                                         *
+ *   This file is part of the FreeCAD CAx development system.              *
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License as published by the Free Software Foundation; either          *
+ *   version 2 of the License, or (at your option) any later version.      *
+ *                                                                         *
+ *   This library  is distributed in the hope that it will be useful,      *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU Library General Public License for more details.                  *
+ *                                                                         *
+ *   You should have received a copy of the GNU Library General Public     *
+ *   License along with this library; see the file COPYING.LIB. If not,    *
+ *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
+ *   Suite 330, Boston, MA  02111-1307, USA                                *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef SURFACE_FEATURESECTIONS_H
+#define SURFACE_FEATURESECTIONS_H
+
+#include <App/PropertyStandard.h>
+#include <App/PropertyUnits.h>
+#include <App/PropertyLinks.h>
+#include <Mod/Part/App/FeaturePartSpline.h>
+
+namespace Surface
+{
+
+class SurfaceExport Sections :  public Part::Spline
+{
+    PROPERTY_HEADER_WITH_OVERRIDE(Surface::Sections);
+
+public:
+    Sections();
+    ~Sections();
+
+    App::PropertyLinkSubList NSections;
+
+    // recalculate the feature
+    App::DocumentObjectExecReturn *execute(void) override;
+    /// returns the type name of the view provider
+    const char* getViewProviderName(void) const override {
+        return "SurfaceGui::ViewProviderSections";
+    }
+};
+
+}//Namespace Surface
+
+#endif

src/Mod/Surface/App/PreCompiled.h

@@ -61,6 +61,7 @@
 
 //opencascade
 #include "OpenCascadeAll.h"
+#include <GeomFill_NSections.hxx>
 
 #endif //_PreComp_