PDT: Refactor - Stage 4

- Check Object Mode is either EDIT or OBJECT as appropriate.
- Change If loop to check command values - error if D, E, For M commands.
- Remove surplus command check in command_maths function.
- Added import of exceptions file.
- Check for Mesh Objects in Object or Edit Mode first and exit with error
  message if not.
- Some minor changes for obscure failures in unusual circumstances.
- Fixes and changes to code to correct minor errors and remove unnecessary
  checks.
- Refactored Command File structure.
- Add more checks to Fillet Operation to check selection and make sure
  current selected vertices/edges are always used. Previous version could
  use wrong selection if Bmesh SelectHistory was in place for Faces, or Edges.

1 files changed, 68 insertions, 0 deletions

diff --git a/pdt_exception.py b/pdt_exception.py
new file mode 100644
index 00000000..4287974b
--- /dev/null
+++ b/pdt_exception.py
@@ -0,0 +1,68 @@
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+#
+# 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 for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENCE BLOCK *****
+
+# -----------------------------------------------------------------------
+# Author: Alan Odom (Clockmender), Rune Morling (ermo) Copyright (c) 2019
+# -----------------------------------------------------------------------
+#
+# Exception Routines
+
+
+class SelectionError(Exception):
+    pass
+
+
+class InvalidVector(Exception):
+    pass
+
+
+class CommandFailure(Exception):
+    pass
+
+
+class ObjectMode(Exception):
+    pass
+
+
+class MathsError(Exception):
+    pass
+
+
+class InfRadius(Exception):
+    pass
+
+
+class NoObjectError(Exception):
+    pass
+
+
+class IntersectionError(Exception):
+    pass
+
+
+class InvalidOperation(Exception):
+    pass
+
+
+class VerticesConnected(Exception):
+    pass
+
+
+class InvalidAngle(Exception):
+    pass