fix #2908

tutorials/c++/t5.cpp

@@ -48,15 +48,11 @@ void cheeseHole(double x, double y, double z, double r, double lc,
 
   // We need non-plane surfaces to define the spherical holes. Here we use the
   // `gmsh::model::geo::addSurfaceFilling()' function, which can be used for
-  // surfaces with 3 or 4 curves on their boundary. With the he built-in kernel,
-  // if the curves are circle arcs, ruled surfaces are created; otherwise
-  // transfinite interpolation is used.
-  //
-  // With the OpenCASCADE kernel, `gmsh::model::occ::addSurfaceFilling()' uses a
-  // much more general generic surface filling algorithm, creating a BSpline
-  // surface passing through an arbitrary number of boundary curves. The
-  // `gmsh::model::geo::addThruSections()' allows to create ruled surfaces (see
-  // `t19.cpp').
+  // surfaces with 3 or 4 curves on their boundary. If the curves are circle
+  // arcs with the same center, a spherical patch is created; otherwise
+  // transfinite interpolation is used. With the OpenCASCADE kernel,
+  // `gmsh::model::occ::addSurfaceFilling()' can be used with an arbitrary
+  // number of boundary curves, and will fit a BSpline patch through them.
 
   int s1 = gmsh::model::geo::addSurfaceFilling({l1});
   int s2 = gmsh::model::geo::addSurfaceFilling({l2});

tutorials/fortran/t5.f90

@@ -216,15 +216,11 @@ integer(c_int) function cheeseHole(x, y, z, r, lc, shells) result(v)
 
   ! We need non-plane surfaces to define the spherical holes. Here we use the
   ! `gmsh%model%geo%addSurfaceFilling()' function, which can be used for
-  ! surfaces with 3 or 4 curves on their boundary. With the he built-in
-  ! kernel, if the curves are circle arcs, ruled surfaces are created;
-  ! otherwise transfinite interpolation is used.
-  !
-  ! With the OpenCASCADE kernel, `gmsh%model%occ.addSurfaceFilling()' uses a
-  ! much more general generic surface filling algorithm, creating a BSpline
-  ! surface passing through an arbitrary number of boundary curves. The
-  ! `gmsh%model%geo%addThruSections()' allows to create ruled surfaces (see
-  ! `t19.f90').
+  ! surfaces with 3 or 4 curves on their boundary. If the curves are circle arcs
+  ! with the same center, a spherical patch is created; otherwise transfinite
+  ! interpolation is used. With the OpenCASCADE kernel,
+  ! `gmsh%model%occ.addSurfaceFilling()' can be used with an arbitrary number of
+  ! boundary curves, and will fit a BSpline patch through them.
 
   s1 = gmsh%model%geo%addSurfaceFilling([l1])
   s2 = gmsh%model%geo%addSurfaceFilling([l2])

tutorials/julia/t5.jl

@@ -137,15 +137,11 @@ function cheeseHole(x, y, z, r, lc, shells)
 
     # We need non-plane surfaces to define the spherical holes. Here we use the
     # `gmsh.model.geo.addSurfaceFilling()' function, which can be used for
-    # surfaces with 3 or 4 curves on their boundary. With the he built-in
-    # kernel, if the curves are circle arcs, ruled surfaces are created;
-    # otherwise transfinite interpolation is used.
-    #
-    # With the OpenCASCADE kernel, `gmsh.model.occ.addSurfaceFilling()' uses a
-    # much more general generic surface filling algorithm, creating a BSpline
-    # surface passing through an arbitrary number of boundary curves. The
-    # `gmsh.model.geo.addThruSections()' allows to create ruled surfaces (see
-    # `t19.jl').
+    # surfaces with 3 or 4 curves on their boundary. If the curves are circle
+    # arcs with the same center, a spherical patch is created; otherwise
+    # transfinite interpolation is used. With the OpenCASCADE kernel,
+    # `gmsh.model.occ.addSurfaceFilling()' can be used with an arbitrary number
+    # of boundary curves, and will fit a BSpline patch through them.
 
     s1 = gmsh.model.geo.addSurfaceFilling([l1])
     s2 = gmsh.model.geo.addSurfaceFilling([l2])

tutorials/python/t5.py

@@ -140,15 +140,11 @@ def cheeseHole(x, y, z, r, lc, shells):
 
     # We need non-plane surfaces to define the spherical holes. Here we use the
     # `gmsh.model.geo.addSurfaceFilling()' function, which can be used for
-    # surfaces with 3 or 4 curves on their boundary. With the he built-in
-    # kernel, if the curves are circle arcs, ruled surfaces are created;
-    # otherwise transfinite interpolation is used.
-    #
-    # With the OpenCASCADE kernel, `gmsh.model.occ.addSurfaceFilling()' uses a
-    # much more general generic surface filling algorithm, creating a BSpline
-    # surface passing through an arbitrary number of boundary curves. The
-    # `gmsh.model.geo.addThruSections()' allows to create ruled surfaces (see
-    # `t19.py').
+    # surfaces with 3 or 4 curves on their boundary. If the curves are circle
+    # arcs with the same center, a spherical patch is created; otherwise
+    # transfinite interpolation is used. With the OpenCASCADE kernel,
+    # `gmsh.model.occ.addSurfaceFilling()' can be used with an arbitrary number
+    # of boundary curves, and will fit a BSpline patch through them.
 
     s1 = gmsh.model.geo.addSurfaceFilling([l1])
     s2 = gmsh.model.geo.addSurfaceFilling([l2])

tutorials/t5.geo

@@ -91,13 +91,11 @@ Macro CheeseHole
 
   // We need non-plane surfaces to define the spherical holes. Here we use
   // `Surface', which can be used for surfaces with 3 or 4 curves on their
-  // boundary. With the he built-in kernel, if the curves are circle arcs, ruled
-  // surfaces are created; otherwise transfinite interpolation is used.
-  //
-  // With the OpenCASCADE kernel, `Surface' uses a much more general generic
-  // surface filling algorithm, creating a BSpline surface passing through an
-  // arbitrary number of boundary curves; and `ThruSections' allows to create
-  // ruled surfaces (see `t19.geo').
+  // boundary. With the built-in kernel, if all the curves are circle arcs with
+  // the same center, a spherical patch is created; otherwise transfinite
+  // interpolation is used. With the OpenCASCADE kernel, `Surface' can be used
+  // with an arbitrary number of boundary curves, and will fit a BSpline patch
+  // through them.
 
   l1 = newcl; Curve Loop(l1) = {c5,c10,c4};
   l2 = newcl; Curve Loop(l2) = {c9,-c5,c1};