October 2024
Intermediate
240 pages
6h 57m
Japanese
Content preview from 図解まるわかり VR・AR・MRのしくみ
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64
レンダリング、CPU、GPU
瞬時に描写される
リアルタイムレンダリング
3-8
XR体験を支えるレンダリング
XRデバイスのスペック表には、必ずといっていいほどレンダリングと
いう項目が設定されています。レンダリングとは、コンピュータがデータ
から画像や映像を生成するプロセスのことです。
具体的には、3Dモデルやアニメーション、環境のデータをもとにして
最終的な画像や映像を作り出す作業を指します。レンダリングには、リア
ルタイムレンダリングとオフラインレンダリング（プリレンダリング）の
2 種類があり、XRで利用するのはリアルタイムレンダリングです。
XR体験を向上させるためにはリアルタイムレンダリングが重要
リアルタイムレンダリングでは、ユーザーの動きに合わせて環境が即座
に更新されます（図3-15）。例えば、ユーザーが頭を動かすと、視界も同
時に切り変わります。この反応の高速さが現実感を増幅させて、より深い
没入感を生み出すのです。逆に遅延があると、不自然さやVR酔いの原因
となり、体験の質が低下してしまいます。
リアルタイムレンダリングには高性能CPUまたはGPUが必須
リアルタイムレンダリングには多くの計算リソースを使用するため、非常
に高性能な
CPU（CentralProcessingUnit）とGPU（GraphicsProcessing
Unit）が不可欠です（図3-16）。
CPUは、コンピュータの中心的な処理装置で、コンピュータの指令を
読み取り、解析し、実行する役割を持ちます。GPU ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.