From b3b7d823cebb1bad92434b90ebdefefafea591d1 Mon Sep 17 00:00:00 2001
From: Dmitrij Naumov <dmitrij@naumov.de>
Date: Fri, 16 Sep 2016 16:45:45 +0200
Subject: [PATCH] [MeL] Add getBaseNodes() collecting nodes from elements.
The vector is filled with pointers to base nodes.
---
MeshLib/Elements/Utils.h | 43 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 MeshLib/Elements/Utils.h
diff --git a/MeshLib/Elements/Utils.h b/MeshLib/Elements/Utils.h
new file mode 100644
index 00000000000..388a1d8bb01
--- /dev/null
+++ b/MeshLib/Elements/Utils.h
@@ -0,0 +1,43 @@
+/**
+ * \copyright
+ * Copyright (c) 2012-2016, OpenGeoSys Community (http://www.opengeosys.org)
+ * Distributed under a Modified BSD License.
+ * See accompanying file LICENSE.txt or
+ * http://www.opengeosys.org/project/license
+ *
+ */
+
+#ifndef MESHLIB_ELEMENTS_UTILS_H_
+#define MESHLIB_ELEMENTS_UTILS_H_
+
+#include <algorithm>
+#include <vector>
+
+#include "BaseLib/makeVectorUnique.h"
+#include "MeshLib/Node.h"
+
+#include "Element.h"
+
+namespace MeshLib
+{
+/// Returns a vector of node pointers containing the base nodes of the elements
+/// input vector.
+inline std::vector<Node*> getBaseNodes(std::vector<Element*> const& elements)
+{
+ std::vector<Node*> base_nodes;
+ base_nodes.reserve(elements.size() * 2); // Save some of the realloctions.
+
+ for (auto* const e : elements)
+ {
+ std::copy(e->getNodes(), e->getNodes() + e->getNumberOfBaseNodes(),
+ std::back_inserter(base_nodes));
+ }
+
+ BaseLib::makeVectorUnique(base_nodes);
+
+ return base_nodes;
+}
+
+} // namespace MeshLib
+
+#endif // MESHLIB_ELEMENTS_UTILS_H_
--
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