rectangle-overlap/index.js

Computes the area of the intersection of two rectangles.

"use strict";
function getOverlap(rectangle1, rectangle2) {
    const intersectionX1 = Math.max(rectangle1.x, rectangle2.x);
    const intersectionX2 = Math.min(rectangle1.x + rectangle1.width, rectangle2.x + rectangle2.width);
    if (intersectionX2 < intersectionX1) {
        return null;
    }
    const intersectionY1 = Math.max(rectangle1.y, rectangle2.y);
    const intersectionY2 = Math.min(rectangle1.y + rectangle1.height, rectangle2.y + rectangle2.height);
    if (intersectionY2 < intersectionY1) {
        return null;
    }
    return new Rectangle(intersectionX1, intersectionY1, intersectionX2 - intersectionX1, intersectionY2 - intersectionY1);
}
class Rectangle {
    constructor(x, y, width, height) {
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
    }
    get area() {
        return this.width * this.height;
    }
}
module.exports = getOverlap;
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