From 523b8c086c17074b03cd3579b30bec5141d9b4dd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Joachim=20Sch=C3=B6berl?= <joachim.schoeberl@tuwien.ac.at>
Date: Sat, 12 Jan 2019 14:18:56 +0100
Subject: [PATCH] GetFaceEdges in new mesh-interface (without global ptr)

---
 libsrc/include/nginterface_v2.hpp   | 21 ++++++++++++++++++---
 libsrc/interface/nginterface_v2.cpp | 10 ++++++++++
 2 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/libsrc/include/nginterface_v2.hpp b/libsrc/include/nginterface_v2.hpp
index 33a596db..116219b4 100644
--- a/libsrc/include/nginterface_v2.hpp
+++ b/libsrc/include/nginterface_v2.hpp
@@ -44,6 +44,19 @@ namespace netgen
     size_t Size() const { return s; }
     T * Release() { T * hd = data; data = nullptr; return hd; }
   };
+
+  template <typename T, int S>
+  class Ng_BufferMS
+  {
+    size_t s;
+    T data[S];
+  public:
+    Ng_BufferMS (size_t as) : s(as) { ; } 
+    size_t Size() const { return s; }
+    T & operator[] (size_t i) { return data[i]; }
+    T operator[] (size_t i) const { return data[i]; }
+  };
+
   
   class Ng_Element
   {
@@ -185,6 +198,7 @@ namespace netgen
       int operator[] (size_t i) const { return ptr[i]-POINTINDEX_BASE; }
     };
 
+    /*
     class Ng_Edges
     {
     public:
@@ -194,11 +208,11 @@ namespace netgen
       size_t Size() const { return ned; }
       int operator[] (size_t i) const { return ptr[i]-1; }
     };
-
+    */
 
   public:
     Ng_Vertices vertices;
-    Ng_Edges edges;
+    // Ng_Edges edges;
     int surface_el;  // -1 if face not on surface
   };
 
@@ -282,7 +296,8 @@ namespace netgen
 
     template <int DIM>
     const Ng_Node<DIM> GetNode (int nr) const;
-    
+
+    Ng_BufferMS<int,4> GetFaceEdges (int fnr) const;
     
     template <int DIM>
     int GetNNodes ();
diff --git a/libsrc/interface/nginterface_v2.cpp b/libsrc/interface/nginterface_v2.cpp
index fee63976..cb7fd673 100644
--- a/libsrc/interface/nginterface_v2.cpp
+++ b/libsrc/interface/nginterface_v2.cpp
@@ -717,6 +717,16 @@ namespace netgen
     return mesh->GetIdentifications().GetType(idnr+1);
   }
 
+  Ng_BufferMS<int,4> Ngx_Mesh::GetFaceEdges (int fnr) const
+  {
+    const MeshTopology & topology = mesh->GetTopology();
+    ArrayMem<int,4> ia;
+    topology.GetFaceEdges (fnr+1, ia);
+    Ng_BufferMS<int,4> res(ia.Size());
+    for (size_t i = 0; i < ia.Size(); i++)
+      res[i] = ia[i]-1;
+    return res;
+  }