thi-ng/umbrella

import type { Attribs, IHiccupShape } from "@thi.ng/geom-api";
import type { Vec } from "@thi.ng/vectors";
import { __copyShape } from "../internal/copy.js";
import { __ensureNumVerts } from "../internal/pclike.js";
import { APC } from "./apc.js";

export class Quad extends APC implements IHiccupShape {
    constructor(points: Iterable<Vec>, attribs?: Attribs) {
        super(points, attribs);
        __ensureNumVerts(this.points.length, 4);
    }

    get type() {
        return "quad";
    }

    copy(): Quad {
        return <Quad>__copyShape(Quad, this);
    }

    withAttribs(attribs: Attribs): Quad {
        return new Quad(this.points, attribs);
    }

    toHiccup() {
        return ["polygon", this.attribs, this.points];
    }
}