#223 - Rectangle Area

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Problem Description

Given the coordinates of two rectilinear rectangles in a 2D plane, return the total area covered by the two rectangles.

The first rectangle is defined by its bottom-left corner (ax1, ay1) and its top-right corner (ax2, ay2).

The second rectangle is defined by its bottom-left corner (bx1, by1) and its top-right corner (bx2, by2).

Solution

/**
 * @param {number} ax1
 * @param {number} ay1
 * @param {number} ax2
 * @param {number} ay2
 * @param {number} bx1
 * @param {number} by1
 * @param {number} bx2
 * @param {number} by2
 * @return {number}
 */
var computeArea = function(ax1, ay1, ax2, ay2, bx1, by1, bx2, by2) {
  return (ax2 - ax1) * (ay2 - ay1) + (bx2 - bx1) * (by2 - by1)
    - Math.max(0, Math.min(ax2, bx2) - Math.max(ax1, bx1))
    * Math.max(0, Math.min(ay2, by2) - Math.max(ay1, by1));
};