obelisk2 https://blog.hatena.ne.jp/obelisk2/ Camera Obscura https://obelisk.hatenablog.com/ Ruby Gem 'oekaki' 引き続き Gem 'oekaki' で落書きです。 oekaki | RubyGems.org | your community gem host GTK+でお絵かきしてみた（Ruby） - Camera Obscura Ruby コード。 require 'oekaki' include Math L = 300; O = L / 2 R = 140 step = 20 i = 0 Oekaki.app width: L, height: L do draw do color(0, 0, 0) rectangle(true, 0, 0, L, L) color(0x87 * 256, 0xc… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fobelisk.hatenablog.com%2Fentry%2F2017%2F01%2F25%2F142139" title="GTK+で落書き 4（Ruby） - Camera Obscura" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> http://img.f.hatena.ne.jp/images/fotolife/o/obelisk2/20170125/20170125141715.png Hatena Blog https://hatena.blog 2017-01-25 14:21:39 rich https://obelisk.hatenablog.com/entry/2017/01/25/142139 1.0 100%