addon/utils/parse-touch-data.js
function getPointDistance(x0, x1, y0, y1) {
  return (Math.sqrt(((x1 - x0) * (x1 - x0)) + ((y1 - y0) * (y1 - y0))));
}
function getPointDistance(x0, x1, y0, y1) {
  return (Math.sqrt(((x1 - x0) * (x1 - x0)) + ((y1 - y0) * (y1 - y0))));
}
function getPointDistance ( x0 , x1 , y0 , y1 ) { return ( Math . sqrt ( ( ( x1 - x0 ) * ( x1 - x0 ) ) + ( ( y1 - y0 ) * ( y1 - y0 ) ) ) ) ; }
Calculates the distance between two points

@function getPointDistance
@param {number} x0 X coordinate of the origin
@param {number} x1 X coordinate of the current position
@param {number} y0 Y coordinate of the origin
@param {number} y1 Y coordinate of the current position
@return {number} Distance between the two points
@private
Calculates the distance between two points