@litecanvas/utils/src/collision/colrect.js

Utilities to help build litecanvas games

import assert from "../debug/assert.js"

/**
 * Check a collision between two rectangles
 *
 * @param {number} x1 first rectangle position X
 * @param {number} y1 first rectangle position Y
 * @param {number} w1 first rectangle width
 * @param {number} h1 first rectangle height
 * @param {number} x2 second rectangle position X
 * @param {number} y2 second rectangle position Y
 * @param {number} w2 second rectangle width
 * @param {number} h2 second rectangle height
 * @returns {boolean}
 */
export default (x1, y1, w1, h1, x2, y2, w2, h2) => {
  DEV: assert(
    Number.isFinite(x1),
    "[litecanvas/utils] [litecanvas/utils] colrect() 1st param must be a number"
  )
  DEV: assert(
    Number.isFinite(y1),
    "[litecanvas/utils] colrect() 2nd param must be a number"
  )
  DEV: assert(
    Number.isFinite(w1),
    "[litecanvas/utils] colrect() 3rd param must be a number"
  )
  DEV: assert(
    Number.isFinite(h1),
    "[litecanvas/utils] colrect() 4th param must be a number"
  )
  DEV: assert(
    Number.isFinite(x2),
    "[litecanvas/utils] colrect() 5th param must be a number"
  )
  DEV: assert(
    Number.isFinite(y2),
    "[litecanvas/utils] colrect() 6th param must be a number"
  )
  DEV: assert(
    Number.isFinite(w2),
    "[litecanvas/utils] colrect() 7th param must be a number"
  )
  DEV: assert(
    Number.isFinite(h2),
    "[litecanvas/utils] colrect() 8th param must be a number"
  )

  return x1 < x2 + w2 && x1 + w1 > x2 && y1 < y2 + h2 && y1 + h1 > y2
}