From 3d493adfefb1265c8c815eb307fa7e5865a2a53d Mon Sep 17 00:00:00 2001
From: Laurent Rineau <laurent.rineau@cgal.org>
Date: Wed, 31 Jan 2024 12:25:58 +0100
Subject: [PATCH] "merge facets" is not by default

---
 Triangulation_3/test/Triangulation_3/CMakeLists.txt     | 1 +
 Triangulation_3/test/Triangulation_3/cdt_3_from_off.cpp | 6 ++++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/Triangulation_3/test/Triangulation_3/CMakeLists.txt b/Triangulation_3/test/Triangulation_3/CMakeLists.txt
index 7d94284525e..3077901aa06 100644
--- a/Triangulation_3/test/Triangulation_3/CMakeLists.txt
+++ b/Triangulation_3/test/Triangulation_3/CMakeLists.txt
@@ -80,6 +80,7 @@ function(CGAL_add_cdt3_from_off_test_aux data_name data_dir)
   endif()
   add_test(NAME "execution   of  cdt_3_from_off ${data_name}"
       COMMAND cdt_3_from_off
+      --no-merge-facets
       ${data_dir}/${data_filename}
       ${CMAKE_CURRENT_BINARY_DIR}/dump_output_${data_name}.off)
   if(MY_ONLY_MERGE_FACETS)
diff --git a/Triangulation_3/test/Triangulation_3/cdt_3_from_off.cpp b/Triangulation_3/test/Triangulation_3/cdt_3_from_off.cpp
index d987947a2ed..cdb636eea21 100644
--- a/Triangulation_3/test/Triangulation_3/cdt_3_from_off.cpp
+++ b/Triangulation_3/test/Triangulation_3/cdt_3_from_off.cpp
@@ -62,7 +62,7 @@ struct CDT_options
 {
   int verbose = 0;
   bool quiet = false;
-  bool merge_facets = false;
+  bool merge_facets = true;
   bool merge_facets_old_method = false;
   double ratio = 0.;
   double vertex_vertex_epsilon = 1e-6;
@@ -85,7 +85,7 @@ Usage: cdt_3_from_off [options] input.off output.off
   output.off: output mesh
 
   -V/--verbose: verbose (can be used several times)
-  --merge-facets: merge facets into patches (unset by default)
+  --merge-facets/--no-merge-facets: merge facets into patches (set by default)
   --ratio <double>: ratio of faces to remove (default: 0)
   --failure-expression <expression>: expression to detect bad mesh (to use with --ratio)
   --dump-patches-after-merge <filename.ply>: dump patches after merging facets in PLY
@@ -113,6 +113,8 @@ int main(int argc, char* argv[])
     std::string arg = argv[i];
     if(arg == "--merge-facets") {
       options.merge_facets = true;
+    } else if(arg == "--no-merge-facets") {
+      options.merge_facets = false;
     } else if(arg == "--merge-facets-old") {
       options.merge_facets = true;
       options.merge_facets_old_method = true;