Added thread milling radii calculation

src/Mod/Path/PathTests/TestPathThreadMilling.py

@@ -0,0 +1,61 @@
+# -*- coding: utf-8 -*-
+
+# ***************************************************************************
+# *                                                                         *
+# *   Copyright (c) 2019 sliptonic <shopinthewoods@gmail.com>               *
+# *                                                                         *
+# *   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 PathScripts.PathGeom as PathGeom
+import PathScripts.PathThreadMilling as PathThreadMilling
+import math
+
+from PathTests.PathTestUtils import PathTestBase
+
+def radii(major, minor, toolDia, toolCrest):
+    '''test radii function for simple testing'''
+    return (minor, major)
+
+class TestPathThreadMilling(PathTestBase):
+    '''Test thread milling basics.'''
+
+    def assertRadii(self, have, want):
+        self.assertRoughly(have[0], want[0])
+        self.assertRoughly(have[1], want[1])
+
+    def assertList(self, have, want):
+        self.assertEqual(len(have), len(want));
+        for i in range(len(have)):
+            self.assertRoughly(have[i], want[i])
+
+    def test00(self):
+        '''Verify metric internal radii.'''
+        self.assertRadii(PathThreadMilling.radiiMetricInternal(20, 18, 2, 0), (8, 9.2))
+        self.assertRadii(PathThreadMilling.radiiMetricInternal(20, 19, 2, 0), (8.5, 9.1))
+
+    def test01(self):
+        '''Verify metric internal radii with tool crest.'''
+        self.assertRadii(PathThreadMilling.radiiMetricInternal(20, 18, 2, 0.1), (8, 9.113397))
+
+    def test10(self):
+        '''Verify thread passes.'''
+        self.assertList(PathThreadMilling.threadPasses(1, radii, 10, 9, 0, 0), [10])
+        self.assertList(PathThreadMilling.threadPasses(2, radii, 10, 9, 0, 0), [9.5, 10])
+        self.assertList(PathThreadMilling.threadPasses(5, radii, 10, 9, 0, 0), [9.2, 9.4, 9.6, 9.8, 10])
+