generaterandompoint.js

let getRandBetween = function(min, max) {
  return Math.random() * (max - min) + min;
}

let getRandCoordkm = function(minX, minY, maxX, maxY) {
  
let height = maxY - minY;
let width = maxX - minX;
let perimeter = 2 * (height + width);
let randNum = getRandBetween(0,perimeter);
let randomPoint = {
	x:5,
	y:6
};

if (randNum > width * 2 + height) {
	//randomPoint falls on left side
	randomPoint = {
          x: minX,
          y: minY + (randNum - (width*2 + height))
      }
} else if (randNum > width + height) {
    //randomPoint falls on top side
    randomPoint = {
          x: minX + (randNum - (width + height)),
          y: maxY
      }
} else if (randNum > width) {
    //randomPoint falls on right side
    randomPoint = {
          x: maxX,
          y: minY + (randNum - width)
      }
} else {
	//randomPoint falls on bottom side
    randomPoint = {
          x: minX + randNum,
          y: minY
      }
}
return randomPoint;
};