Class MeshBuilder

Number of vertices so far.

A square-section beam from a to b (frames, masts, struts, legs).

An axis-aligned box centred at c with full size. taper scales the top face's x and z half sizes; shift moves the top face along z (raked windscreens, sloped bows).

The finished mesh.

A cylinder (or cone/frustum with radius2) along an axis, centred at c.

A low-poly ellipsoid (top = upper half only: canopies, domes).

Adds a planar convex polygon (fan-triangulated, flat normal). With inside, the face is turned to point away from that point.

A flat convex outline ([u, v] points) in the plane through origin spanned by u and v, extruded by thickness (wings, tail fins, rudders, blades).

Runs fn with everything it adds rotated (Euler YXZ, radians) and then offset.

A smooth solid of revolution about an axis through c: profile is a list of (radius, offset along the axis) points (tyres, hubs, headlight buckets, tanks). paintOf(k) colours the band between profile points k and k+1.

A hull lofted through cross-sections along z (fuselages, boat hulls, train cars). Faces whose centre lies below split.y use split.paint (antifouling under the waterline, a belly colour).

A smooth rounded box (superellipsoid) centred at c with full size: exponent e 2 = ellipsoid, higher = boxier with rounded edges (seats, mirrors, lamps, bumpers, cabs).

A smooth-shaded surface through a grid of points: rows[i][j], rows along the length, points around (closed: each row is a ring). Normals are averaged over the grid, so curved bodywork shows no facets; paintOf(i, j) colours the cell between rows i, i+1 and points j, j+1 (colour edges stay crisp). Faces are turned outwards (away from each row's centre); caps closes the first and last ring with flat faces.

A hollow tube (duct, ring) along an axis.