1 files changed, 53 insertions, 0 deletions
diff --git a/CSXCAD/python/CSXCAD/Utilities.pyx b/CSXCAD/python/CSXCAD/Utilities.pyx
new file mode 100644
index 0000000..768da21
--- /dev/null
+++ b/CSXCAD/python/CSXCAD/Utilities.pyx
@@ -0,0 +1,53 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2015,20016 Thorsten Liebig (Thorsten.Liebig@gmx.de)
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published
+# by the Free Software Foundation, either version 3 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+def CheckNyDir(ny):
+    """ CheckNyDir(ny)
+
+    Translate directions like 'x'/'y' or 'z' into 0/1 or 2.
+    Raise an assertion error otherwise.
+
+    :param ny: int or str
+    :returns: int -- direction as 0/1/2
+    """
+    if ny in [0, 1, 2]:
+        return ny
+    elif ny in ['x','y','z']:
+        return ['x','y','z'].index(ny)
+    elif ny in ['r','a','z']:
+        return ['r','a','z'].index(ny)
+    else:
+        raise Exception('CheckNyDir: invalid direction: "{}"'.format(ny))
+
+def GetMultiDirs(dirs):
+    assert type(dirs)==str, 'GetMultiDirs: dirs must be of type str'
+    dirs = ''.join(sorted(dirs))
+    if dirs == 'all' or dirs == 'xyz' or dirs == 'raz':
+        return [0, 1, 2]
+    elif dirs == 'x' or dirs == 'r':
+        return [0,]
+    elif dirs == 'y' or dirs == 'a':
+        return [1,]
+    elif dirs == 'z':
+        return [2,]
+    elif dirs == 'xy' or dirs == 'ra':
+        return [0, 1]
+    elif dirs == 'yz' or dirs == 'az':
+        return [1, 2]
+    elif dirs == 'xz' or dirs == 'rz':
+        return [0, 2]