From b52734115a2eb7c04c395d1fc01f10378ba4436f Mon Sep 17 00:00:00 2001
From: Paolo Cignoni <paolo.cignoni@isti.cnr.it>
Date: Wed, 30 Aug 2017 15:57:50 +0200
Subject: [PATCH] Added first version of foreach helpers

---
 vcg/complex/complex.h |  1 +
 vcg/complex/foreach.h | 90 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+)
 create mode 100644 vcg/complex/foreach.h

diff --git a/vcg/complex/complex.h b/vcg/complex/complex.h
index 65ec404c..082fd9aa 100644
--- a/vcg/complex/complex.h
+++ b/vcg/complex/complex.h
@@ -48,6 +48,7 @@
 #include <vcg/simplex/face/topology.h>
 #include <vcg/simplex/edge/pos.h>
 #include <vcg/simplex/edge/topology.h>
+#include <vcg/complex/foreach.h>
 #include <vcg/complex/algorithms/update/flag.h>
 #include <vcg/complex/algorithms/update/selection.h>
 #include <vcg/complex/algorithms/update/topology.h>
diff --git a/vcg/complex/foreach.h b/vcg/complex/foreach.h
new file mode 100644
index 00000000..c43c4eb9
--- /dev/null
+++ b/vcg/complex/foreach.h
@@ -0,0 +1,90 @@
+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2004-2017                                           \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* This program is free software; you can redistribute it and/or modify      *
+* it under the terms of the GNU General Public License as published by      *
+* the Free Software Foundation; either version 2 of the License, or         *
+* (at your option) any later version.                                       *
+*                                                                           *
+* This program is distributed in the hope that it will be useful,           *
+* but WITHOUT ANY WARRANTY; without even the implied warranty of            *
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
+* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+
+#ifndef VCG__FOREACH_H
+#define VCG__FOREACH_H
+
+#ifndef __VCG_MESH
+#error "This file should not be included alone. It is automatically included by complex.h"
+#endif
+
+namespace vcg {
+namespace tri {
+/** \addtogroup trimesh
+@{
+*/
+
+template <class MeshType>
+inline void ForEachFacePos(MeshType &m, std::function<void (typename face::Pos<typename MeshType::FaceType>  &)> action)
+{
+  typedef typename face::Pos<typename MeshType::FaceType> PosType;
+  
+    for(auto fi=m.face.begin();fi!=m.face.end();++fi)
+        if(!(*fi).IsD())
+        {
+            for(int i=0;i<3;++i)
+            {
+                PosType pi(&*fi,i);
+                action(pi);
+            }
+        }
+}
+
+template <class MeshType>
+inline void ForEachFace(const MeshType &m, std::function<void (const typename MeshType::FaceType &)> action)
+{
+    for(auto fi=m.face.begin();fi!=m.face.end();++fi)
+        if(!(*fi).IsD())
+        {
+          action(*fi);
+        }
+}
+
+template <class MeshType>
+inline void ForEachFace(MeshType &m, std::function<void (typename MeshType::FaceType &)> action)
+{
+    for(auto fi=m.face.begin();fi!=m.face.end();++fi)
+        if(!(*fi).IsD())
+        {
+          action(*fi);
+        }
+}
+
+
+template <class MeshType>
+inline void forEachVertex(MeshType &m, std::function<void (typename MeshType::FaceType &)> action)
+{
+    for(auto fi=m.face.begin();fi!=m.face.end();++fi)
+        if(!(*fi).IsD())
+        {
+          action(*fi);
+        }
+}
+
+
+
+/** @} */ // end doxygen group trimesh
+} // end namespace tri
+} // end namespace vcg
+
+#endif // VCG__FOREACH_H