geemudesu/helper_functions.pde

public float roundFloat(float f, int decimals) {
  int pow = 10;
  for (int i = 1; i < decimals; i++)
    pow *= 10;
  float tmp = f * pow;
  return ( (float) ( (int) ((tmp - (int) tmp) >= 0.5f ? tmp + 1 : tmp) ) ) / pow;
}