July 2016
Intermediate to advanced
416 pages
6h 39m
Japanese
Content preview from 初めてのThree.js 第2版 ―WebGLのためのJavaScript 3Dライブラリ
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2章シーンの基本要素
前章でThree.jsの基本について学びました。いくつかのサンプルを紹介し、読者にとってはおそらく初めてである完全なThree.jsシーンを作成しました。この章ではもう少しThree.jsの詳細に踏み込み、シーンを構成する基本的なコンポーネントについて説明します。この章で説明するのは以下のようなトピックについてです。
- Three.jsシーンで使用されるコンポーネント群
Three.Sceneオブジェクトを使用してできること- ジオメトリとメッシュの関係
- 平行投影カメラと透視投影カメラの違い
初めにシーンを作成する方法と、そこにオブジェクトを追加する方法について説明します。
2.1 シーンの作成
前の章でTHREE.Sceneを使用したので、すでにThree.jsの基本についてはある程度知っているはずです。シーンに何かを表示するには表2-1にある3つの種類のコンポーネントが必要でした。
表2-1 シーンの表示に必要な3つのコンポーネント
| コンポーネント | 説明 |
|---|---|
| カメラ | シーンに何を描画するかを決定する |
| ライト | マテリアルがどのように表示され、影を作成する時にどのように使用されるか（詳細は「3章 光源」で説明）に影響を与える |
| オブジェクト | カメラの視点で描画される主な物体群。立方体、球など |
THREE.Sceneはさまざまなオブジェクトすべてを保持するコンテナです。このオブジェクト自身のオプションや機能はそれほど多くありません。
![[警告]](/api/v2/epubs/urn:orm:book:9784873117706/files/images/warning.png) |
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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.