polygonjs-engine/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 {
	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.type = 'IcosahedronBufferGeometry';

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