May 2017
Intermediate to advanced
432 pages
5h 26m
Japanese
Content preview from SVGエッセンシャルズ 第2版
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8章パターンとグラデーション
ここまで、グラフィックオブジェクトを塗りつぶしたり、その輪郭を描いたりするために、単色だけを使ってきました。しかし、単色しか使えないわけではありません。パターンやグラデーションを使って、図形を塗りつぶしたり、その輪郭を描いたりすることができます。この章では、それらについて説明します。
8.1 パターン
パターンを使用するには、グラフィックオブジェクトを定義し、それが水平方向および垂直方向に繰り返されて別のグラフィックオブジェクト（またはストローク）を塗りつぶすように設定します。このグラフィックオブジェクトは、タイル（tile）と呼ばれます。なぜなら、パターンを使ってあるオブジェクトを塗りつぶす行為は、床面をタイルで覆うことにとてもよく似ているからです。この節では、例8-1のSVGによって描かれる二次曲線をタイルとして使います。その領域（20×20ユーザー単位）をはっきりと示すために、境界線をグレーで描きます。
例8-1 パターンタイルのためのパス
<path d="M 0 0 Q 5 20 10 10 T 20 20"
style="stroke: black; fill: none;"/>
<path d="M 0 0 h20 v20 h-20 z"
style="stroke: gray; fill: none;"/>
図8-1は、見やすいように拡大してあります。
図8-1 パターンタイルの拡大図
8.1.1 patternUnits属性 ...
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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.