From 8114a4d3d649cfce2f7fdeacdbcbcc1fccba2e59 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Sun, 28 Nov 2021 12:13:16 -0700
Subject: [PATCH] Fix and augment documentation.

Specifically, the picture shows four, not three hexahedra being subdivided.
---
 include/deal.II/grid/grid_generator.h | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/include/deal.II/grid/grid_generator.h b/include/deal.II/grid/grid_generator.h
index 5269a6d0a4..18821ddeff 100644
--- a/include/deal.II/grid/grid_generator.h
+++ b/include/deal.II/grid/grid_generator.h
@@ -2020,14 +2020,16 @@ namespace GridGenerator
    * (quadrilaterals, hexahedra) to a triangulation only consisting of
    * simplices (triangles, tetrahedra).
    *
-   * As an example, the following image shows how a set of three hexahedra
-   * meshing one eighths of a sphere are subdivided into tetrahedra, and how
+   * As an example, the following image shows how a set of four hexahedra
+   * meshing one eighth of a sphere are subdivided into tetrahedra, and how
    * the curved surface is taken into account. Colors indicate how boundary
    * indicators are inherited:
    * @image html "convert_hypercube_to_simplex_mesh_visualization_octant.png"
    *
    * In general, each quadrilateral in 2d is subdivided into eight triangles,
-   * and each hexahedron in 3d into 24 tetrahedra as shown here:
+   * and each hexahedron in 3d into 24 tetrahedra, as shown here (top left
+   * for the 2d case, the rest shows vertex numbers and subdivisions for
+   * a single 3d hexahedron):
    * @image html "convert_hypercube_to_simplex_mesh_visualization.png"
    *
    * Material ID and boundary IDs are inherited upon conversion.
-- 
2.39.5