Added draft angle example

Author: tpaviot

examples/core_topology_draft_angle.py

@@ -0,0 +1,52 @@
+##Copyright 2009-2015 Thomas Paviot ([email protected])
+##
+##This file is part of pythonOCC.
+##
+##pythonOCC 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.
+##
+##pythonOCC 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 pythonOCC.  If not, see <http://www.gnu.org/licenses/>.
+
+import math
+from OCC.gp import gp_Dir, gp_Pln, gp_Ax3, gp_XOY
+from OCC.BRepPrimAPI import BRepPrimAPI_MakeBox
+from OCC.BRepOffsetAPI import BRepOffsetAPI_DraftAngle
+from OCC.Precision import precision_Angular
+from OCC.BRep import BRep_Tool_Surface
+from OCC.TopExp import TopExp_Explorer
+from OCC.TopAbs import TopAbs_FACE
+from OCC.Geom import Handle_Geom_Plane_DownCast
+from OCC.TopoDS import topods_Face
+
+from OCC.Display.SimpleGui import init_display
+display, start_display, add_menu, add_function_to_menu = init_display()
+
+
+def draft_angle(event=None):
+    S = BRepPrimAPI_MakeBox(200., 300., 150.).Shape()
+    adraft = BRepOffsetAPI_DraftAngle(S)
+    topExp = TopExp_Explorer()
+    topExp.Init(S, TopAbs_FACE)
+    while topExp.More():
+        face = topods_Face(topExp.Current())
+        surf = Handle_Geom_Plane_DownCast(BRep_Tool_Surface(face)).GetObject()
+        dirf = surf.Pln().Axis().Direction()
+        ddd = gp_Dir(0, 0, 1)
+        if dirf.IsNormal(ddd, precision_Angular()):
+            adraft.Add(face, ddd, math.radians(15), gp_Pln(gp_Ax3(gp_XOY())))
+        topExp.Next()
+    adraft.Build()
+    display.DisplayShape(adraft.Shape(), update=True)
+
+
+if __name__ == '__main__':
+    draft_angle()
+    start_display()