circle_slits.py

#!/usr/bin/env python3

from montyscad import monty_symbols as ms
from decimal import Decimal

def circle_slits(radius, slits_num, width, sleleton_width=Decimal('0.0001')):
    interval = radius * 2 / (slits_num + 1)
    symbol = ms.Union()

    for i in range(slits_num):
        symbol.append(
            ms.Translate([0, interval * (i + 1)])(
                ms.Square([radius * 2, sleleton_width], center=True)
            )
        )

    symbol = ms.Translate([0, -radius])(
        symbol
    )

    symbol = ms.Intersection()(
        symbol,
        ms.Circle(radius)
    )

    symbol = ms.Offset(width)(
        symbol
    )

    return symbol

def _example():
    import os.path
    from montyscad import Scad

    scad = Scad()
    scad.append('$fn=120;')

    scad += [
        circle_slits(Decimal('15.0'), 9, Decimal('0.75'))
    ]

    basename = os.path.basename(__file__)
    basename_root = os.path.splitext(basename)[0]
    scad.write(f'./__{basename_root}.scad')

if __name__ == '__main__':
    _example()