"""Cotter pin (split pin), simplified as step.parts' published models draw it: two round legs side by side and a round
cross bar for the eye, nominal sizes 1 to 5 mm, any length.

The legs (diameter d, the nominal size) run along +Z from z = 0 to the length l, their axes at x = +-e; the eye is a
round bar of diameter d along X, 2d long, centred on the origin. There is no eye loop, no half-round wire and no
point: see the README.
"""
from steve import Model

size = "2"  # Nominal size d (mm)
length = 32  # mm Length l
material = "steel"  # Material

# mm, measured on step.parts' models iso_1234_cotter_pin_d<d>_l<l>_simple (every face read: the legs' and the bar's
# cylinder radii and axes): {d: (leg and bar diameter, leg axis offset e from the centre, bar length)}
SIZES = {
    "1": (1.0, 0.35, 2.0),
    "1.6": (1.6, 0.56, 3.2),
    "2": (2.0, 0.7, 4.0),
    "2.5": (2.5, 0.875, 5.0),
    "3.2": (3.2, 1.12, 6.4),
    "4": (4.0, 1.4, 8.0),
    "5": (5.0, 1.75, 10.0),
}
MATERIALS = {"steel": ("steel-generic", "#9da2a8"), "stainless": ("stainless-304", "#c9ccd0")}

d, e, bar = SIZES[size]
material_id, colour = MATERIALS[material]
model = Model()
model.cylinder("leg_1", d / 2, length, at=(e, 0, 0), name="Leg")
model.cylinder("leg_2", d / 2, length, at=(-e, 0, 0), op="join", name="Leg")
model.cylinder("eye", d / 2, bar, at=(-bar / 2, 0, 0), direction=(1, 0, 0), op="join", name="Eye")
model.material(material_id, color=colour)
result = model.result()