@polygonjs/polygonjs/src/core/geometry/operation/Icosahedron.ts

node-based WebGL 3D engine https://polygonjs.com

import {PolyhedronBufferGeometry} from './Polyhedron';

// from three/src/geometries/IcosahedronGeometry
export class IcosahedronBufferGeometry extends PolyhedronBufferGeometry {
	override parameters: any; //{radius: number, detail:number}
	constructor(radius: number, detail: number, points_only: boolean) {
		const t = (1 + Math.sqrt(5)) / 2;

		const vertices = [
			-1,
			t,
			0,
			1,
			t,
			0,
			-1,
			-t,
			0,
			1,
			-t,
			0,
			0,
			-1,
			t,
			0,
			1,
			t,
			0,
			-1,
			-t,
			0,
			1,
			-t,
			t,
			0,
			-1,
			t,
			0,
			1,
			-t,
			0,
			-1,
			-t,
			0,
			1,
		];

		const indices = [
			0, 11, 5, 0, 5, 1, 0, 1, 7, 0, 7, 10, 0, 10, 11, 1, 5, 9, 5, 11, 4, 11, 10, 2, 10, 7, 6, 7, 1, 8, 3, 9, 4,
			3, 4, 2, 3, 2, 6, 3, 6, 8, 3, 8, 9, 4, 9, 5, 2, 4, 11, 6, 2, 10, 8, 6, 7, 9, 8, 1,
		];

		super(vertices, indices, radius, detail, points_only);

		(this as any).type = 'IcosahedronBufferGeometry';

		this.parameters = {
			radius: radius,
			detail: detail,
		};
	}
}