geom-revolve

Create a simplicial complex geometry by revolving a path around Y axis.

Installation

npm install geom-revolve

Usage

import revolve from "geom-revolve";

const path = new Float32Array([
  0.0, 0.0, 0.0, 0.1, 0.0, 0.0, 0.2, 0.2, 0.0, 0.3, 0.5, 0.0, 0.3, 0.7, 0.0,
  0.1, 0.8, 0.0, 0.1, 1.0, 0.0, 0.0, 1.0, 0.0,
]);

const geometry = revolve(path);
// => { positions: Float32Array(384), cells: Uint32Array(672) }

API

revolve(path, [options]): geometry

Parameters

• path: TypedArray | Array | Array<[x, y, z]> - positions defining the path to revolve.

• options: { numSteps: number, angle: number, loop: boolean }:

  • numSteps: number (default: 16) - rotation subdivisions.
  • angle: number (default: Math.PI * 2) - angle to rotate by.
  • loop: boolean (default: undefined) - merges the seam but creates visual discontinuities with UVs so it is opt-in.

Returns

geometry: { positions: TypedArray | Array<[x, y, z]>, cells: TypedArray | Array<[x, y, z]> } - the revolved geometry.

Returned cells will be either Array of Arrays or TypedArray depending on the path data.

License

MIT, see LICENSE.md for details.