ass method
Implementation
MathTime ass( dynamic r ){
if( r is MathTime ){
_fps = r._fps;
_minus = r._minus;
_hour = r._hour;
_min = r._min;
_sec = r._sec;
_frame = r._frame;
_update();
} else {
_set( ClipMath.toDouble(r) );
}
return this;
}