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 __   _     _____     ____     _    _     _____   
| || | ||  |  ___||  |  _ \\  | || | ||  / ____|| 
| '--' ||  | ||__    | |_| || | || | || / //---`' 
| .--. ||  | ||__    | .  //  | \\_/ || \ \\___   
|_|| |_||  |_____||  |_|\_\\   \____//   \_____|| 
`-`  `-`   `-----`   `-` --`    `---`     `----`

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發送短信 : Navigational methods in 3D virtual environments