FEM: Add basic FemTools module

That module will handle in the future all non-gui related features
that are currently in MechanicalAnalysis.py. It will allow easier
python scripting and greater flexibility when creating new FEM wb
features.

Signed-off-by: Przemo Firszt <przemo@firszt.eu>

src/Mod/Fem/FemTools.py

@@ -0,0 +1,52 @@
+#***************************************************************************
+#*                                                                         *
+#*   Copyright (c) 2015 - Przemo Firszt <przemo@firszt.eu>                 *
+#*                                                                         *
+#*   This program is free software; you can redistribute it and/or modify  *
+#*   it under the terms of the GNU Lesser General Public License (LGPL)    *
+#*   as published by the Free Software Foundation; either version 2 of     *
+#*   the License, or (at your option) any later version.                   *
+#*   for detail see the LICENCE text file.                                 *
+#*                                                                         *
+#*   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 Library General Public License for more details.                  *
+#*                                                                         *
+#*   You should have received a copy of the GNU Library General Public     *
+#*   License along with this program; if not, write to the Free Software   *
+#*   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
+#*   USA                                                                   *
+#*                                                                         *
+#***************************************************************************
+
+
+import FreeCAD
+import FemGui
+
+
+class FemTools:
+    def __init__(self, analysis_object=None):
+        if analysis_object:
+            self.fem_analysis = analysis_object
+        else:
+            self.fem_analysis = FemGui.getActiveAnalysis()
+        self.mesh = None
+        for m in self.fem_analysis.Member:
+            if m.isDerivedFrom("Fem::FemMeshObject"):
+                self.mesh = m
+
+    def purge_results(self):
+        for m in self.fem_analysis.Member:
+            if (m.isDerivedFrom('Fem::FemResultObject')):
+                FreeCAD.ActiveDocument.removeObject(m.Name)
+
+    def reset_mesh_deformation(self):
+        if self.mesh:
+            self.mesh.ViewObject.applyDisplacement(0.0)
+
+    def reset_mesh_color(self):
+        if self.mesh:
+            self.mesh.ViewObject.NodeColor = {}
+            self.mesh.ViewObject.ElementColor = {}
+            self.mesh.ViewObject.setNodeColorByScalars()