Useful functions

Mapping values

Map values from one range to another.

Function definition

function mapRange(value, oldMin, oldMax, newMin, newMax) {
  return ((value - oldMin) * (newMax - newMin) / (oldMax - oldMin)) + newMin;
}

Example

var out_x = mapRange(in_x, 279, 922, -1.72, 1.72);
var out_y = mapRange(in_y, 315, 771, 4.61, 2.16);