3 # Draw a hexaflexagon template with cairo.
5 # Copyright (C) 2018 Antonio Ospite <ao2@ao2.it>
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20 from diagram.cairo_diagram import CairoDiagram
21 from flexagon import HexaflexagonDiagram
24 def draw_cairo_template():
25 # A4 page at 300dpi is 3508x2480 in pixels but cairo expects units to be in
26 # points, so adjust the values.
31 font_size = width / 80
32 stroke_width = width / 480
34 cairo_backend = CairoDiagram(width, height, font_size=font_size, stroke_width=stroke_width)
35 hexaflexagon = HexaflexagonDiagram(x_border, backend=cairo_backend)
38 hexaflexagon.draw_template()
39 cairo_backend.save_svg('hexaflexagon-template')
42 if __name__ == '__main__':