[occ][brep] implement getshape for bboxes

This reuses the code of getShape(box) for now. But, when the Box class
is made more generic (not necessarily axis-aligned), then the code will
be different.

frackit/occ/breputilities.hh

@@ -91,6 +91,7 @@
 #include <frackit/geometry/cylindersurface.hh>
 #include <frackit/geometry/box.hh>
 #include <frackit/geometry/boundingbox.hh>
+#include <frackit/geometry/boundingbox.hh>
 #include <frackit/geometry/sphere.hh>
 
 #include <frackit/geometryutilities/name.hh>
@@ -323,6 +324,8 @@ namespace OCCUtilities {
     /*!
      * \ingroup OpenCascade
      * \brief Get the BRep of a box.
+     * \todo TODO: Once boxes are more generic (than axis-aligned
+     *             bounding boxes), this must be adapted
      */
     template<class ctype>
     TopoDS_Solid getShape(const Box<ctype>& box)
@@ -336,6 +339,22 @@ namespace OCCUtilities {
         return TopoDS::Solid(makeBox.Shape());
     }
 
+    /*!
+     * \ingroup OpenCascade
+     * \brief Get the BRep of a bounding box.
+     */
+    template<class ctype>
+    TopoDS_Solid getShape(const BoundingBox<ctype>& bbox)
+    {
+        const gp_Pnt pMin(bbox.xMin(), bbox.yMin(), bbox.zMin());
+        const gp_Pnt pMax(bbox.xMax(), bbox.yMax(), bbox.zMax());
+        BRepPrimAPI_MakeBox makeBox(pMin, pMax);
+        makeBox.Build();
+        if (!makeBox.IsDone())
+            throw std::runtime_error("Could not build box");
+        return TopoDS::Solid(makeBox.Shape());
+    }
+
     /*!
      * \ingroup OpenCascade
      * \brief Get the BRep of a sphere.