translate method

Implementation

void translate(dynamic x, [double y = 0.0, double z = 0.0]) {
  double tx;
  double ty;
  double tz;
  final tw = x is Vector4 ? x.w : 1.0;
  if (x is Vector3) {
    tx = x.x;
    ty = x.y;
    tz = x.z;
  } else if (x is Vector4) {
    tx = x.x;
    ty = x.y;
    tz = x.z;
  } else if (x is double) {
    tx = x;
    ty = y;
    tz = z;
  } else {
    throw UnimplementedError();
  }
  final t1 = _m4storage[0] * tx +
      _m4storage[4] * ty +
      _m4storage[8] * tz +
      _m4storage[12] * tw;
  final t2 = _m4storage[1] * tx +
      _m4storage[5] * ty +
      _m4storage[9] * tz +
      _m4storage[13] * tw;
  final t3 = _m4storage[2] * tx +
      _m4storage[6] * ty +
      _m4storage[10] * tz +
      _m4storage[14] * tw;
  final t4 = _m4storage[3] * tx +
      _m4storage[7] * ty +
      _m4storage[11] * tz +
      _m4storage[15] * tw;
  _m4storage[12] = t1;
  _m4storage[13] = t2;
  _m4storage[14] = t3;
  _m4storage[15] = t4;
}