sub method

void sub (Vector3 arg)

Subtract arg from this.

Implementation 

void sub(Vector3 arg) {
  final Float64List argStorage = arg._v3storage;
  _v3storage[0] = _v3storage[0] - argStorage[0];
  _v3storage[1] = _v3storage[1] - argStorage[1];
  _v3storage[2] = _v3storage[2] - argStorage[2];
}