From 8bc59f47ca64d04ab5f8d622b0f2a6c863c37590 Mon Sep 17 00:00:00 2001
From: tomate44 <cg@grellier.fr>
Date: Sun, 10 Jun 2018 17:49:32 +0200
Subject: [PATCH] add Approximation option to FeaturePartSection

---
 src/Mod/Part/App/FeaturePartSection.cpp | 21 +++++++++++++++++++--
 src/Mod/Part/App/FeaturePartSection.h   |  3 +++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/src/Mod/Part/App/FeaturePartSection.cpp b/src/Mod/Part/App/FeaturePartSection.cpp
index 55cd6da6ea..06f47c31bf 100644
--- a/src/Mod/Part/App/FeaturePartSection.cpp
+++ b/src/Mod/Part/App/FeaturePartSection.cpp
@@ -37,10 +37,27 @@ PROPERTY_SOURCE(Part::Section, Part::Boolean)
 
 Section::Section(void)
 {
+    ADD_PROPERTY_TYPE(Approximation,(false),"Section",App::Prop_None,"Approximate the output edges");
 }
 
-BRepAlgoAPI_BooleanOperation* Section::makeOperation(const TopoDS_Shape& base, const TopoDS_Shape& tool) const
+short Section::mustExecute() const
+{
+    if (Approximation.isTouched())
+        return 1;
+    return 0;
+}
+
+BRepAlgoAPI_BooleanOperation *Section::makeOperation(const TopoDS_Shape& base, const TopoDS_Shape& tool) const
 {
     // Let's call algorithm computing a section operation:
-    return new BRepAlgoAPI_Section(base, tool);
+    // return new BRepAlgoAPI_Section(base, tool);
+    bool approx = Approximation.getValue();
+    BRepAlgoAPI_Section* mkSection = new BRepAlgoAPI_Section();
+    mkSection->Init1(base);
+    mkSection->Init2(tool);
+    mkSection->Approximation(approx);
+    mkSection->Build();
+    if (!mkSection->IsDone())
+        throw Base::RuntimeError("Section failed");
+    return mkSection;
 }
diff --git a/src/Mod/Part/App/FeaturePartSection.h b/src/Mod/Part/App/FeaturePartSection.h
index ca27b902cc..2b5f73c956 100644
--- a/src/Mod/Part/App/FeaturePartSection.h
+++ b/src/Mod/Part/App/FeaturePartSection.h
@@ -38,9 +38,12 @@ class Section : public Boolean
 public:
     Section();
 
+    App::PropertyBool Approximation;
+    
     /** @name methods override Feature */
     //@{
     /// recalculate the Feature
+    short mustExecute() const;
 protected:
     BRepAlgoAPI_BooleanOperation* makeOperation(const TopoDS_Shape&, const TopoDS_Shape&) const;
     //@}