{"id":2510,"date":"2016-12-06T21:19:40","date_gmt":"2016-12-06T12:19:40","guid":{"rendered":"http:\/\/stuffy.dip.jp\/wordpress\/?p=2510"},"modified":"2017-05-29T16:15:40","modified_gmt":"2017-05-29T07:15:40","slug":"pendulum","status":"publish","type":"post","link":"https:\/\/www.stuffy.site\/wordpress\/?p=2510","title":{"rendered":"\u632f\u308a\u5b50"},"content":{"rendered":"<p>\u56de\u8ee2\u95a2\u6570\u306e\u5fdc\u7528\u3067\u632f\u308a\u5b50\u3092\u4f5c\u3063\u3066\u307f\u307e\u3057\u305f\u3002\u632f\u308a\u5b50 \u306e\u521d\u671f\u89d2\u5ea6\u00a0rads(init)=\u03c0\/6 \u306b\u5bfe\u3057\u3066\u89d2\u904b\u52d5\u91cf rads(init)*Math.cos(rads(d)), \uff08\u305f\u3060\u3057\u89d2\u632f\u52d5\u6570\u3001d = +5[\u00b0\/100ms] \uff09\u3067\u3059\u3002\u3053\u3053\u306e\u6240\u306f\u30a2\u30d0\u30a6\u30c8\u306b\u3057\u3066\u6b63\u78ba\u306a\u7269\u7406\u8a08\u7b97\u306f\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<p><a href=\"https:\/\/stuffy.mydns.jp\/~gusachan\/javascript\/pendulum.html\">https:\/\/stuffy.mydns.jp\/~gusachan\/javascript\/pendulum.html<\/a><\/p>\n<pre class=\"brush: actionscript3; gutter: false; first-line: 1\"><span style=\"font-size: 10pt;\">var d = 0;\r\nvar c=document.getElementById(\"graph\");\r\nvar ctx=c.getContext(\"2d\");\r\nvar init = Number(document.getElementById('degree').value);\r\nwindow.onload = function() {\r\n\u00a0 function rads(x) {\r\n\u00a0\u00a0\u00a0 return Math.PI*x\/180;\r\n\u00a0 }\r\n\u00a0 function coordinate() {\r\n\u00a0\u00a0\u00a0 ctx.beginPath();\r\n\u00a0\u00a0\u00a0 ctx.moveTo(0,200);\r\n\u00a0\u00a0\u00a0 ctx.lineTo(400,200);\r\n\u00a0\u00a0\u00a0 ctx.moveTo(200,0);\r\n\u00a0\u00a0\u00a0 ctx.lineTo(200,400);\r\n\u00a0\u00a0\u00a0 ctx.closePath();\r\n\u00a0\u00a0\u00a0 ctx.stroke();\r\n\u00a0\u00a0\u00a0 ctx.beginPath();\r\n\u00a0\u00a0\u00a0 ctx.arc(200,200,150,0,rads(360),false);\r\n\u00a0\u00a0\u00a0 ctx.stroke();\r\n\u00a0 }\r\n\u00a0 function furiko() {\r\n\u00a0\u00a0\u00a0 var init = Number(document.getElementById('degree').value);\r\n\u00a0\u00a0\u00a0 d += 5;\r\n\u00a0\u00a0\u00a0 arg = rads(init)*Math.cos(rads(d))+rads(-90);\r\n\u00a0\u00a0\u00a0 ctx.clearRect(0,0,400,400);\r\n\u00a0\u00a0\u00a0 coordinate();\r\n\u00a0\u00a0\u00a0 ctx.beginPath();\r\n    ctx.moveTo(200,200);\r\n  \u00a0 ctx.lineTo(200 + 150*Math.cos(arg), 200 - 150*Math.sin(arg));\r\n\u00a0\u00a0\u00a0 ctx.closePath();\r\n\u00a0\u00a0\u00a0 ctx.stroke();\r\n\u00a0 }\r\n\u00a0 coordinate();\r\n\u00a0 setInterval(furiko, 100);\r\n}\r\n<\/span><\/pre>\n<p>\u53c2\u8003URL: <a href=\"http:\/\/www.daido-it.ac.jp\/~harashin\/pdf\/note\/10riki2_note9.pdf\">http:\/\/www.daido-it.ac.jp\/~harashin\/pdf\/note\/10riki2_note9.pdf<\/a><\/p>\n<p><a href=\"https:\/\/www.stuffy.site\/wordpress\/wp-content\/uploads\/2016\/12\/pendulum_.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2545\" src=\"https:\/\/www.stuffy.site\/wordpress\/wp-content\/uploads\/2016\/12\/pendulum_.png\" alt=\"pendulum_\" width=\"1011\" height=\"641\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u56de\u8ee2\u95a2\u6570\u306e\u5fdc\u7528\u3067\u632f\u308a\u5b50\u3092\u4f5c\u3063\u3066\u307f\u307e\u3057\u305f\u3002\u632f\u308a\u5b50 \u306e\u521d\u671f\u89d2\u5ea6\u00a0rads(init)=\u03c0\/6 \u306b\u5bfe\u3057\u3066\u89d2\u904b\u52d5\u91cf rads(init)*Math.cos(rads(d)), \uff08\u305f\u3060\u3057\u89d2\u632f\u52d5\u6570\u3001d = +5[\u00b0\/100ms] \uff09 &hellip; <a href=\"https:\/\/www.stuffy.site\/wordpress\/?p=2510\" class=\"more-link\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"screen-reader-text\">\u632f\u308a\u5b50<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[87,5],"tags":[],"class_list":["post-2510","post","type-post","status-publish","format-standard","hentry","category-javascript","category-software"],"_links":{"self":[{"href":"https:\/\/www.stuffy.site\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2510","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stuffy.site\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stuffy.site\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stuffy.site\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stuffy.site\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2510"}],"version-history":[{"count":23,"href":"https:\/\/www.stuffy.site\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2510\/revisions"}],"predecessor-version":[{"id":2552,"href":"https:\/\/www.stuffy.site\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2510\/revisions\/2552"}],"wp:attachment":[{"href":"https:\/\/www.stuffy.site\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stuffy.site\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stuffy.site\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}