core_display_callbacks.py

##Copyright 2010-2014 Thomas Paviot (tpaviot@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 OCC.Core.BRepPrimAPI import BRepPrimAPI_MakeBox, BRepPrimAPI_MakeTorus
from OCC.Core.Bnd import Bnd_Box
from OCC.Core.BRepBndLib import brepbndlib_Add
from OCC.Display.SimpleGui import init_display


def print_xy_click(shp, *kwargs):
    for shape in shp:
        print("Shape selected: ", shape)
    print(kwargs)


def compute_bbox(shp, *kwargs):
    print(f"Compute bbox for {shp} ")
    for shape in shp:
        bbox = Bnd_Box()
        brepbndlib_Add(shape, bbox)
        xmin, ymin, zmin, xmax, ymax, zmax = bbox.Get()
        dx = xmax - xmin
        dy = ymax - ymin
        dz = zmax - zmin
        print("Selected shape bounding box : dx=%f, dy=%f, dz=%f." % (dx, dy, dz))
        print(
            "               bounding box center: x=%f, y=%f, z=%f"
            % (xmin + dx / 2.0, ymin + dy / 2.0, zmin + dz / 2.0)
        )


display, start_display, add_menu, add_function_to_menu = init_display()
# register callbacks
display.register_select_callback(print_xy_click)
display.register_select_callback(compute_bbox)
# creating geometry
my_torus = BRepPrimAPI_MakeBox(10.0, 20.0, 30.0).Shape()
my_box = BRepPrimAPI_MakeTorus(30.0, 5.0).Shape()
# and finally display geometry
display.DisplayShape(my_torus)
display.DisplayShape(my_box, update=True)
start_display()