Added core_geometry_line_properties thanks Emad

Author: tpaviot

examples/core_display_line_properties.py

@@ -0,0 +1,78 @@
+#!/usr/bin/env python
+
+##Copyright 2017 Emad Dlala (emad.dlala@gmail.com)
+##
+##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/>.
+
+from __future__ import print_function
+
+import sys
+
+from OCC.gp import gp_Pnt, gp_Dir
+from OCC.Geom import Geom_Line
+from OCC.AIS import AIS_Line, AIS_Drawer
+from OCC.Quantity import Quantity_NOC_RED
+from OCC.Prs3d import (Prs3d_LineAspect)
+from OCC.Aspect import Aspect_TOL_DASH
+
+from OCC.Display.SimpleGui import init_display
+display, start_display, add_menu, add_function_to_menu = init_display()
+
+
+def line():
+    # create a line
+    p1 = gp_Pnt(2., 3., 4.)
+    d1 = gp_Dir(4., 5., 6.)
+    line1 = Geom_Line(p1, d1)
+
+    ais_line1 = AIS_Line(line1.GetHandle())
+
+    # if we need to edit color, we can simply use SetColor
+    # ais_line1.SetColor(Quantity_NOC_RED)
+
+    # but actually we need to edit more, not just color. Line width and style as well
+    # To do that, we need to do use AIS_Drawer and apply it to ais_line1
+    width = 1.0
+    drawer = AIS_Drawer()
+    asp = Prs3d_LineAspect(Quantity_NOC_RED, Aspect_TOL_DASH, width)
+    drawer.SetLineAspect(asp.GetHandle())
+    ais_line1.SetAttributes(drawer.GetHandle())
+
+    display.Context.Display(ais_line1.GetHandle(), False)
+    # we can apply the same rule for other lines by just doing a for loop
+    for i in range(1, 5):
+        p2 = gp_Pnt(i, 2., 5.)
+        d2 = gp_Dir(4*i, 6., 9.)
+        line2 = Geom_Line(p2, d2)
+
+        ais_line2 = AIS_Line(line2.GetHandle())
+        #  ais_line2.SetColor(Quantity_NOC_RED)
+
+        width = float(i)
+        drawer = AIS_Drawer()
+        asp = Prs3d_LineAspect(9*i, i, width)
+        drawer.SetLineAspect(asp.GetHandle())
+        ais_line2.SetAttributes(drawer.GetHandle())
+
+        display.Context.Display(ais_line2.GetHandle(), False)
+    start_display()
+
+
+def exit(event=None):
+    sys.exit()
+
+if __name__ == '__main__':
+    line()