Part: fix build for OCC 7.6

Fixes FreeCAD#219

src/Mod/Part/App/Geometry.cpp

@@ -30,7 +30,6 @@
 # include <BRep_Tool.hxx>
 # include <BRepAdaptor_Curve.hxx>
 # include <BRepAdaptor_Surface.hxx>
-# include <BRepAdaptor_HSurface.hxx>
 # include <Geom_CartesianPoint.hxx>
 # include <Geom_Circle.hxx>
 # include <Geom_Curve.hxx>
@@ -107,7 +106,8 @@
 # include <LProp_NotDefined.hxx>
 # include <TopoDS.hxx>
 # if OCC_VERSION_HEX < 0x070600
-# include <GeomAdaptor_HCurve.hxx>
+#  include <GeomAdaptor_HCurve.hxx>
+#  include <BRepAdaptor_HSurface.hxx>
 # endif
 
 # include <memory>
@@ -4530,12 +4530,20 @@ static Standard_Boolean IsPlanar(const Adaptor3d_Surface& theS)
     const GeomAbs_SurfaceType aST = theS.GetType();
     if(aST == GeomAbs_OffsetSurface)
     {
+# if OCC_VERSION_HEX < 0x070600
         return IsPlanar(theS.BasisSurface()->Surface());
+#else
+        return IsPlanar(*theS.BasisSurface());
+#endif
     }
 
     if(aST == GeomAbs_SurfaceOfExtrusion)
     {
+# if OCC_VERSION_HEX < 0x070600
         return IsLinear(theS.BasisCurve()->Curve());
+#else
+        return IsLinear(*theS.BasisCurve());
+#endif
     }
 
     if((aST == GeomAbs_BSplineSurface) || (aST == GeomAbs_BezierSurface))

src/Mod/Part/App/TopoShapeEx.cpp

@@ -34,13 +34,14 @@
 # include <BRep_Tool.hxx>
 # include <BRepAdaptor_Curve.hxx>
 # include <BRepAdaptor_CompCurve.hxx>
+# if OCC_VERSION_HEX < 0x070600
 # include <BRepAdaptor_HCurve.hxx>
 # include <BRepAdaptor_HCompCurve.hxx>
+# endif
 # include <BRepAdaptor_Surface.hxx>
 # include <BRepAlgoAPI_Common.hxx>
 # include <BRepAlgoAPI_Cut.hxx>
 # include <BRepAlgoAPI_Fuse.hxx>
-# include <BRepAlgo_Fuse.hxx>
 # include <BRepAlgoAPI_Section.hxx>
 # include <BRepBndLib.hxx>
 # include <BRepBuilderAPI_FindPlane.hxx>
@@ -208,6 +209,12 @@
 
 FC_LOG_LEVEL_INIT("TopoShape",true,2);
 
+#if OCC_VERSION_HEX >= 0x070600
+using Adaptor3d_HCurve = Adaptor3d_Curve;
+using BRepAdaptor_HCurve = BRepAdaptor_Curve;
+using BRepAdaptor_HCompCurve = BRepAdaptor_CompCurve;
+#endif
+
 using namespace Part;
 using namespace Data;
 namespace bio = boost::iostreams;