envelope

🎨 3D 预览 — 包络体

@StartRule
Lot --> primitiveCube(6, 0.2, 6)
        envelope(2, 1)
        comp(f) { top: Roof | side: Wall }

Roof --> color(0.5, 0.25, 0.15)
Wall --> color(0.75, 0.72, 0.68)