"""Levelling foot envelope: a round base and a threaded stud (drawn at its nominal diameter), as step.parts' published
models draw it, threads M6 to M12, base diameters 20 to 50 mm (any).

The base (diameter `base_diameter`, thickness BASE_THICKNESS) sits on the XY plane, centred on the origin; the stud
rises from its top along +Z, `stud_length` long. The swivel joint, the rubber pad and the nut are not modelled: the
models draw every style with this same envelope.
"""
from steve import Model

thread = "M8"  # Stud thread
base_diameter = 30  # mm Base diameter
stud_length = 25  # mm Stud length (above the base)
material = "unspecified"  # Material

# mm, measured on step.parts' models leveling_foot_m<d>_d<D> (cylinders of their two solids: base radius D/2 and 5 mm
# thick in every model; stud radius = half the thread's nominal diameter, 25 mm long above the base)
BASE_THICKNESS = 5.0
STUDS = {"M6": 6.0, "M8": 8.0, "M10": 10.0, "M12": 12.0}
MATERIALS = {
    "unspecified": (None, None),   # the models name no material
    "steel": ("steel-generic", "#9da2a8"),
    "stainless-304": ("stainless-304", "#c9ccd0"),
}

d = STUDS[thread]
if base_diameter <= d:
    raise ValueError("The base must be wider than the stud.")
material_id, colour = MATERIALS[material]

model = Model()
model.cylinder("base", base_diameter / 2, BASE_THICKNESS, name="Base")
model.cylinder("stud", d / 2, stud_length, at=(0, 0, BASE_THICKNESS), op="join", name="Stud")
if material_id:
    model.material(material_id, color=colour)
result = model.result()