Extrude - OpenGeometry

OG_OPERATION_EXTRUDE raises a closed wire into a solid. The parameters are { profile, holes?, distance }:

profile: a closed wire, such as a rectangle, a circle, a closed polyline or a closed profile.
holes: closed wires inside the profile, on the same plane.
distance: the height, along the profile’s plane normal.

import {
  OpenGeometry,
  Solid,
  Wire,
  OG_OPERATION_EXTRUDE,
  OG_OPERATION_PARAMS_EXTRUDE,
  OG_PRIMITIVE_CIRCLE,
  OG_PRIMITIVE_RECTANGLE,
} from 'opengeometry';

await OpenGeometry.create(
  { wasmURL: '/opengeometry_bg.wasm' },
  { workerURL: '/tessellation-worker.js' },
);

const plate = new Wire(OG_PRIMITIVE_RECTANGLE, { width: 2, breadth: 1 });
const bolt = new Wire(OG_PRIMITIVE_CIRCLE, { radius: 0.1 }, { plane: { origin: [0.6, 0, 0] } });
const slab = new Solid(
  OG_OPERATION_EXTRUDE,
  OG_OPERATION_PARAMS_EXTRUDE({ profile: plate, holes: [bolt], distance: 0.05 }),
);
console.log(slab.getBrep().topology.faces.length);

A line-and-arc profile

A closed OG_PRIMITIVE_PROFILE extrudes into exact planes and cylinders. This is a quarter ring sector, 3 m high:

import {
  OpenGeometry,
  Solid,
  Wire,
  OG_OPERATION_EXTRUDE,
  OG_PRIMITIVE_PROFILE,
} from 'opengeometry';

await OpenGeometry.create(
  { wasmURL: '/opengeometry_bg.wasm' },
  { workerURL: '/tessellation-worker.js' },
);

const profile = new Wire(OG_PRIMITIVE_PROFILE, {
  start: [1, 0],
  segments: [
    { to: [2, 0] },
    { to: [0, 2], arc: { center: [0, 0], counterClockwise: true } },
    { to: [0, 1] },
    { to: [1, 0], arc: { center: [0, 0], counterClockwise: false } },
  ],
  closed: true,
});
const sector = new Solid(OG_OPERATION_EXTRUDE, { profile, distance: 3 });
console.log(sector.validity().valid);

A curved wall is the same kind of profile, extruded up. Openings in it are booleans. See Booleans.

Rules

The profile must be closed. An open wire throws InvalidParameter.
A hole that encloses the whole profile throws InvalidParameter.
The extrude goes along the profile’s plane normal. On the default ground plane that is +Y.
The wires stay separate bodies. Changing one later does not change the solid.

​A line-and-arc profile

​Rules

A line-and-arc profile

Rules