"""Round bar (solid round stock), any diameter and length: EN 10060 hot-rolled round bars and plain round rod.

A cylinder of diameter `diameter`, its axis along +Z, one end face on the XY plane centred on the origin.
EN 10060 designates a round bar by its nominal diameter; the diameter tolerance of the standard is not modelled.
"""
from steve import Model

diameter = 10  # mm Diameter d
length = 100  # mm Length
material = "steel"  # Material

# material choice: (STEVE material library id, appearance colour)
MATERIALS = {
    "steel": ("steel-s235jr", "#8a8d91"),            # EN 10025-2 S235JR, hot rolled
    "stainless-304": ("stainless-304", "#c9ccd0"),   # EN 10088 1.4301
    "aluminium-6061": ("aluminum-6061-t6", "#d4d7db"),
    "brass": ("brass", "#c9a54a"),
}

material_id, colour = MATERIALS[material]

model = Model()
with model.sketch("section", on="XY", name="Section") as sk:
    sk.circle("outline", (0, 0), diameter / 2)
model.extrude("bar", "section", distance=length, name="Bar")
model.material(material_id, color=colour)
result = model.result()