bug fix and changelog

CHANGELOG.md

@@ -69,6 +69,7 @@ v4.4.0
 - Add flag to `insertsurface` process for non-conforming geometries (!700)
 - Bug fix to get two meshgen regression tests working (!700)
 - Remove libANN in deference to boost::geometry (!703)
+- Add a mesh extract option to the linearise module to visualise the result (!712)
 
 **FieldConvert:**
 - Move all modules to a new library, FieldUtils, to support post-processing

utilities/NekMesh/ProcessModules/ProcessLinear.cpp

@@ -56,7 +56,7 @@ ProcessLinear::ProcessLinear(MeshSharedPtr m) : ProcessModule(m)
     m_config["prismonly"] =
         ConfigOption(false, "", "only acts on prims");
     m_config["extract"] =
-        ConfigOption(true, "0", "dump a mesh of the extracted elements");
+        ConfigOption(false, "", "dump a mesh of the extracted elements");
 }
 
 ProcessLinear::~ProcessLinear()
@@ -225,15 +225,15 @@ void ProcessLinear::Process()
         if(m_config["extract"].beenSet)
         {
             MeshSharedPtr dmp = boost::shared_ptr<Mesh>(new Mesh());
-            oct->m_expDim     = 3;
-            oct->m_spaceDim   = 3;
-            oct->m_nummode    = 2;
+            dmp->m_expDim     = 3;
+            dmp->m_spaceDim   = 3;
+            dmp->m_nummode    = 2;
 
             dmp->m_element[3] = dumpEls;
 
             ModuleSharedPtr mod = GetModuleFactory().CreateInstance(
                 ModuleKey(eOutputModule, "xml"), dmp);
-            mod->RegisterConfig("outfile", "linearised.xml");
+            mod->RegisterConfig("outfile", m_config["extract"].as<string>().c_str());
             mod->ProcessVertices();
             mod->ProcessEdges();
             mod->ProcessFaces();