From e4ec4a2c1f6f5140f51437f766f1fd579cb8213f Mon Sep 17 00:00:00 2001
From: Andreas Fabri <andreas.fabri@geometryfactory.com>
Date: Mon, 13 Mar 2023 17:01:14 +0100
Subject: [PATCH] Subdivision: Add example for Linear_mask_3

---
 .../doc/Subdivision_method_3/examples.txt     |  1 +
 .../Linear_subdivision.cpp                    | 34 +++++++++++++++++++
 .../subdivision_masks_3.h                     |  2 +-
 3 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 Subdivision_method_3/examples/Subdivision_method_3/Linear_subdivision.cpp

diff --git a/Subdivision_method_3/doc/Subdivision_method_3/examples.txt b/Subdivision_method_3/doc/Subdivision_method_3/examples.txt
index 4cf879d4d09..06021185bf7 100644
--- a/Subdivision_method_3/doc/Subdivision_method_3/examples.txt
+++ b/Subdivision_method_3/doc/Subdivision_method_3/examples.txt
@@ -2,6 +2,7 @@
 \example Subdivision_method_3/Customized_subdivision.cpp
 \example Subdivision_method_3/CatmullClark_subdivision.cpp
 \example Subdivision_method_3/DooSabin_subdivision.cpp
+\example Subdivision_method_3/Linear_subdivision.cpp
 \example Subdivision_method_3/Loop_subdivision.cpp
 \example Subdivision_method_3/Sqrt3_subdivision.cpp
 */
diff --git a/Subdivision_method_3/examples/Subdivision_method_3/Linear_subdivision.cpp b/Subdivision_method_3/examples/Subdivision_method_3/Linear_subdivision.cpp
new file mode 100644
index 00000000000..fe7a8e317e6
--- /dev/null
+++ b/Subdivision_method_3/examples/Subdivision_method_3/Linear_subdivision.cpp
@@ -0,0 +1,34 @@
+#include <CGAL/Simple_cartesian.h>
+
+#include <CGAL/Surface_mesh.h>
+#include <CGAL/Polygon_mesh_processing/IO/polygon_mesh_io.h>
+
+#include <CGAL/subdivision_method_3.h>
+
+#include <iostream>
+#include <fstream>
+
+typedef CGAL::Simple_cartesian<double>          Kernel;
+typedef CGAL::Surface_mesh<Kernel::Point_3>     Surface_mesh;
+
+namespace PMP = CGAL::Polygon_mesh_processing;
+
+int main(int argc, char* argv[]) {
+
+  const std::string filename = (argc > 1) ? argv[1] : CGAL::data_file_path("meshes/cube_quad.off");
+
+  Surface_mesh mesh;
+  if(!PMP::IO::read_polygon_mesh(filename, mesh))
+  {
+    std::cerr << "Invalid input." << std::endl;
+    return 1;
+  }
+
+  CGAL::Linear_mask_3<Surface_mesh> mask(&mesh);
+  CGAL::Subdivision_method_3::PQQ(mesh, mask, CGAL::parameters::number_of_iterations(2));
+
+  std::ofstream out("out.off");
+  out << mesh;
+
+  return 0;
+}
diff --git a/Subdivision_method_3/include/CGAL/Subdivision_method_3/subdivision_masks_3.h b/Subdivision_method_3/include/CGAL/Subdivision_method_3/subdivision_masks_3.h
index a65d68323db..5a2e56911ae 100644
--- a/Subdivision_method_3/include/CGAL/Subdivision_method_3/subdivision_masks_3.h
+++ b/Subdivision_method_3/include/CGAL/Subdivision_method_3/subdivision_masks_3.h
@@ -88,7 +88,7 @@ public:
 
 public:
   Linear_mask_3(Mesh* pmesh)
-    : Base(pmesh, get(vertex_point, pmesh))
+    : Base(pmesh, get(vertex_point, *pmesh))
   { }
 
   Linear_mask_3(Mesh* pmesh, VertexPointMap vpmap)