{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","title":"数字化生存 20周年纪念版","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121307362","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","uuid":"bbcce9bd-b637-4fa6-8a80-dadabab80104","title":"数字化生存 20周年纪念版","normalized_title":"数字化生存20周年纪念版","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121307362","isbns":["9787121307362"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":362,"navigation_url":"https://workshop.closeclaw.top/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104","title_url":"https://workshop.closeclaw.top/ai/title/%E6%95%B0%E5%AD%97%E5%8C%96%E7%94%9F%E5%AD%98%2020%E5%91%A8%E5%B9%B4%E7%BA%AA%E5%BF%B5%E7%89%88","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/bbcce9bd-b637-4fa6-8a80-dadabab80104","page_url":"https://workshop.closeclaw.top/api/ai/books/bbcce9bd-b637-4fa6-8a80-dadabab80104/page","search_url":"https://workshop.closeclaw.top/api/ai/books/bbcce9bd-b637-4fa6-8a80-dadabab80104/search"},"page":{"printed_page":115,"pdf_page":186,"physical_index":186,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"d1797238069b9f947823e6c53b2c7d8770916bb7e5a3269cb7317b39447d96fe"},"chapter":"20周年纪念版 数字化生存 一本影响千百万人的互联网启蒙经典著作","content":"目前的虚拟现实还有不少缺点和技术上的失误，必须加以克服之后，才能使它具有更广泛的吸引力。例如，低成本的虚拟现实就深受阶梯状不规则图形的困扰。当影像移动的时候，这种锯齿状的图形显得更不稳定，因为它们看起来好像在移动，但却不一定与画面移动的方向一致。想一想水平线的样子，一条非常平直的水平线。现在稍稍把它倾斜一点，水平线中央就会出现一段锯齿形状，然后再倾斜一点，又出现第二个、第三个和更多的锯齿地带。这些锯齿看起来仿佛在移动，直到这条线终于倾斜成 $4 5 ^ { \\circ }$ ，则线上相邻像素所组成的锯齿排成了一个楼梯形，一个挨着一个，简直难看极了。\n\n总是慢半拍\n\n比这还要糟的是，虚拟现实的速度还不够快。所有的商业系统，尤其是许多电子游戏生产商即将推出的新产品，都有慢半拍的问题。当你转动头部的时候，影像会很快地改变，但是还不够快。图像总要慢半拍才出现。\n\n三维计算机图形刚出现的时候，人们使用各式各样的立体眼镜来达到观看效果。有时是廉价的偏光镜片(polarizedlenses)，有时则是较昂贵的电子快门(electronic shutter)，会轮流让双眼接收不同的影像。\n\nPart 2|个性化界面\n\n115\n\n[2]19世纪英国童话作家刘易斯·卡罗尔(Lewis Carroll)的作品《爱丽丝漫游仙境》中的人物。","previous_page":114,"next_page":116}