75 lines
1.9 KiB
JavaScript
75 lines
1.9 KiB
JavaScript
import { PolyhedronGeometry } from './PolyhedronGeometry.js';
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/**
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* A geometry class for representing an icosahedron.
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*
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* ```js
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* const geometry = new THREE.IcosahedronGeometry();
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* const material = new THREE.MeshBasicMaterial( { color: 0xffff00 } );
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* const icosahedron = new THREE.Mesh( geometry, material );
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* scene.add( icosahedron );
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* ```
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*
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* @augments PolyhedronGeometry
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*/
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class IcosahedronGeometry extends PolyhedronGeometry {
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/**
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* Constructs a new icosahedron geometry.
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*
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* @param {number} [radius=1] - Radius of the icosahedron.
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* @param {number} [detail=0] - Setting this to a value greater than `0` adds vertices making it no longer a icosahedron.
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*/
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constructor( radius = 1, detail = 0 ) {
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const t = ( 1 + Math.sqrt( 5 ) ) / 2;
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const vertices = [
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- 1, t, 0, 1, t, 0, - 1, - t, 0, 1, - t, 0,
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0, - 1, t, 0, 1, t, 0, - 1, - t, 0, 1, - t,
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t, 0, - 1, t, 0, 1, - t, 0, - 1, - t, 0, 1
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];
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const indices = [
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0, 11, 5, 0, 5, 1, 0, 1, 7, 0, 7, 10, 0, 10, 11,
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1, 5, 9, 5, 11, 4, 11, 10, 2, 10, 7, 6, 7, 1, 8,
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3, 9, 4, 3, 4, 2, 3, 2, 6, 3, 6, 8, 3, 8, 9,
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4, 9, 5, 2, 4, 11, 6, 2, 10, 8, 6, 7, 9, 8, 1
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];
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super( vertices, indices, radius, detail );
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this.type = 'IcosahedronGeometry';
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/**
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* Holds the constructor parameters that have been
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* used to generate the geometry. Any modification
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* after instantiation does not change the geometry.
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*
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* @type {Object}
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*/
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this.parameters = {
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radius: radius,
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detail: detail
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};
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}
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/**
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* Factory method for creating an instance of this class from the given
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* JSON object.
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*
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* @param {Object} data - A JSON object representing the serialized geometry.
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* @return {IcosahedronGeometry} A new instance.
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*/
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static fromJSON( data ) {
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return new IcosahedronGeometry( data.radius, data.detail );
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}
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}
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export { IcosahedronGeometry };
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