three-csg-ts/lib/esm/Polygon.js

CSG library for use with THREE.js

import { Plane } from './Plane';
/**
 * Represents a convex polygon. The vertices used to initialize a polygon must
 * be coplanar and form a convex loop. They do not have to be `Vertex`
 * instances but they must behave similarly (duck typing can be used for
 * customization).
 *
 * Each convex polygon has a `shared` property, which is shared between all
 * polygons that are clones of each other or were split from the same polygon.
 * This can be used to define per-polygon properties (such as surface color).
 */
export class Polygon {
    constructor(vertices, shared) {
        this.vertices = vertices;
        this.shared = shared;
        this.plane = Plane.fromPoints(vertices[0].pos, vertices[1].pos, vertices[2].pos);
    }
    clone() {
        return new Polygon(this.vertices.map((v) => v.clone()), this.shared);
    }
    flip() {
        this.vertices.reverse().map((v) => v.flip());
        this.plane.flip();
    }
}