roundToZero method
      
void
roundToZero()
      
     
    
Round entries in this towards zero.
Implementation
void roundToZero() {
  _v2storage[1] = _v2storage[1] < 0.0
      ? _v2storage[1].ceilToDouble()
      : _v2storage[1].floorToDouble();
  _v2storage[0] = _v2storage[0] < 0.0
      ? _v2storage[0].ceilToDouble()
      : _v2storage[0].floorToDouble();
}