@cantoo/pdf-lib/es/utils/elements/Circle.js

Create and modify PDF files with JavaScript

import { distance, distanceCoords, isEqual, minus, plus, times, unitVector, } from '../maths.js';
import GraphElement from './GraphElement.js';
import Point from './Point.js';
export default class Circle extends GraphElement {
    constructor(O = new Point(), r = 1) {
        super();
        this.O = O;
        this.r = r;
    }
    ray() {
        return this.r;
    }
    center() {
        return this.O;
    }
    /** This is used to standardize type Circle | Arc */
    getCircle() {
        return this;
    }
    isEqual(element) {
        return (element instanceof Circle &&
            this.center().isEqual(element.center()) &&
            isEqual(this.ray(), element.ray()));
    }
    includes(P) {
        return isEqual(distance(this.center(), P), this.ray());
    }
    orthoProjection(P) {
        const center = this.center().toCoords();
        const coords = P.toCoords();
        if (distanceCoords(coords, center) < this.ray())
            return P;
        const vect = times(unitVector(minus(coords, center)), this.ray());
        return new Point(plus(center, vect));
    }
}
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