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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154
OpenGLES
モバイル向け3Dグラフィックス
6-15
モバイル向けの 「OpenGL ES」
近年、スマートフォンやタブレットなどの身近にあるモバイルデバイス
でも、十分にリアルな3D 空間を体験することができます。モバイルゲー
ム市場の拡大や高性能GPUの登場が加速して、モバイル向け3Dグラフィ
ックス技術の進化は不可欠な要素となっているのです。
代表的な例が、OpenGL ES（OpenGLforEmbeddedSystems）です。
コンピュータグラフィックスの標準規格であるOpenGLをベースに、モバ
イルデバイスに最適化された仕様です。
具体的には、以下のようなステップで3D グラフィックスが作成されま
す（図 6-29）。まず、3Dモデルのデータ（頂点座標、色情報、テクスチ
ャ座標など）を用意して、OpenGLESの API から3Dモデルのデータを
GPUに転送します。GPUは転送されたデータを処理し、3Dグラフィック
スを描画して、モバイルデバイスの画面に表示します。
このように、3Dグラフィックスの描画に特化したAPIを提供すること
で、モバイルデバイスでの高品質な3D 表現を可能にしているのです。
OpenGL ESの特徴と活用例
OpenGLESは、さまざまなモバイルプラットフォームに対応した3Dグ
ラフィックス技術です（図6-30）。あらかじめ決められた描画手順の固定
機能パイプラインを使わず、開発者が自由にシェーダープログラムを記述
できるプログラマブルシェーダーを採用 ...
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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.