أرسل هذا في رسالة قصيرة: Quantitative analysis of visibility determinations for networked virtual environments

 _____       ___       _____   _    _     ______  
|  __ \\    / _ \\    / ___// | || | ||  /_   _// 
| |  \ ||  / //\ \\   \___ \\ | || | ||    | ||   
| |__/ || |  ___  ||  /    // | \\_/ ||   _| ||   
|_____//  |_||  |_|| /____//   \____//   /__//    
 -----`   `-`   `-` `-----`     `---`    `--`