scale method
Scale this.
Implementation
void scale(double arg) {
  _v3storage[2] *= arg;
  _v3storage[1] *= arg;
  _v3storage[0] *= arg;
}
Scale this.
void scale(double arg) {
  _v3storage[2] *= arg;
  _v3storage[1] *= arg;
  _v3storage[0] *= arg;
}