Mesh: extend API to access edges of a facet via Python

src/Mod/Mesh/App/Edge.cpp

@@ -0,0 +1,74 @@
+/***************************************************************************
+ *   Copyright (c) 2021 Werner Mayer <wmayer[at]users.sourceforge.net>     *
+ *                                                                         *
+ *   This file is part of the FreeCAD CAx development system.              *
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License as published by the Free Software Foundation; either          *
+ *   version 2 of the License, or (at your option) any later version.      *
+ *                                                                         *
+ *   This library  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 Library General Public License for more details.                  *
+ *                                                                         *
+ *   You should have received a copy of the GNU Library General Public     *
+ *   License along with this library; see the file COPYING.LIB. If not,    *
+ *   write to the Free Software Foundation, Inc., 51 Franklin Street,      *
+ *   Fifth Floor, Boston, MA  02110-1301, USA                              *
+ *                                                                         *
+ ***************************************************************************/
+
+
+#include "PreCompiled.h"
+#ifndef _PreComp_
+# include <sstream>
+#endif
+
+#include "Edge.h"
+#include "Mesh.h"
+
+using namespace Mesh;
+
+Edge::Edge()
+  : Index(-1)
+  , Mesh(nullptr)
+{
+    for (int i=0; i<2; i++) {
+        PIndex[i] = MeshCore::POINT_INDEX_MAX;
+        NIndex[i] = MeshCore::FACET_INDEX_MAX;
+    }
+}
+
+Edge::Edge(const Edge& e)
+  : MeshCore::MeshGeomEdge(e)
+  , Index(e.Index)
+  , Mesh(e.Mesh)
+{
+    for (int i=0; i<2; i++) {
+        PIndex[i] = e.PIndex[i];
+        NIndex[i] = e.NIndex[i];
+    }
+}
+
+Edge::~Edge()
+{
+}
+
+void Edge::operator = (const Edge& e)
+{
+    MeshCore::MeshGeomEdge::operator = (e);
+    Mesh  = e.Mesh;
+    Index = e.Index;
+    for (int i=0; i<2; i++) {
+        PIndex[i] = e.PIndex[i];
+        NIndex[i] = e.NIndex[i];
+    }
+}
+
+void Edge::unbound()
+{
+    Index = -1;
+    Mesh = nullptr;
+}