main()
{
	// change 'bike01' to the xmodel filename
	precacheModel( "bike01" );

	// setup the cvar
	setCvar( "scr_bike", "" );
	
	// monitor the cvar and when it changes, thread a function
	while(1)
	{
		if( getCvar( "scr_bike" ) != "" )
			thread changeToBike();
	
		wait 0.05;
	}
}

changeToBike()
{
	id = getCvarInt( "scr_bike" );
	setCvar( "scr_bike", "" );
	
	players = getEntArray( "player", "classname" );
	for( i = 0; i < players.size; i++ )
	{
		if( players[i] getEntityNumber() == id )
			players[i] thread transformPlayer();
	}
}

transformPlayer()
{
	if( !isDefined( self.isBike ) )
		self.isBike = false;
		
	self notify( "model_change" );
		
	// if player isn't a bike, make them so
	if( !self.isBike )
	{	
		self.isBike = true;
		
		self hide();
		
		self.bikeModel = spawn( "script_model", ( 0, 0, 0 ) );
		self.bikeModel.origin = self.origin;
		self.bikeModel.angles = ( 0, self.angles[1], 0 );
		self.bikeModel setModel( "bike01" );
		self.bikeModel LinkTo( self );
		
		self thread monitorBike();
		self thread bikeCleanup();
	}
	else
	{
		// 'model_change' notify will reverse bike
		self.isBike = false;
	}
}

monitorBike()
{
	self endon( "disconnect" );
	self endon( "death" );
	self endon( "joined_spectator" );
	self endon( "model_change" );
	
	while(1)
	{
		self.bikeModel.origin = self.origin;
		self.bikeModel.angles = ( 0, self.angles[1], 0 );
		
		wait 0.05;
	}
}

bikeCleanup()
{
	self waittill_any( "disconnect", "death", "joined_spectator", "model_change" );

	self.bikeModel Delete();
	
	waittillframeend;
	
	if( isDefined( self ) )
		self Show();
}

waittill_any( string1, string2, string3, string4, string5 )
{
	assert( isdefined( string1 ) );
	
	if ( isdefined( string2 ) )
		self endon( string2 );

	if ( isdefined( string3 ) )
		self endon( string3 );

	if ( isdefined( string4 ) )
		self endon( string4 );

	if ( isdefined( string5 ) )
		self endon( string5 );
	
	self waittill( string1 );
}