\nimagerotate \u306e\u7d50\u679c\u3092\u8a08\u7b97\u3067\u51fa\u3057\u305f\u3044\u306a\u3068\u601d\u3044\u6b21\u306e\u30b3\u30fc\u30c9\u3067\u691c\u8a3c\u3057\u3066\u307f\u307e\u3057\u305f\u3002\n<\/p>\n
<?php
\n\/\/ \u5bfe\u8c61\u306e\u753b\u50cf\u306e\u30b5\u30a4\u30ba\u3002
\n$sw = 1000;
\n$sh = 2000;
\n\/\/ \u5b9f\u6e2c\u7528\u306b\u753b\u50cf\u751f\u6210
\n$im = imagecreatetruecolor($sw,$sh);
\nfor($deg = -360; $deg <= 360; $deg +=15){
\n $rad = deg2rad($deg); \/\/ \u4e09\u89d2\u95a2\u6570\u306f\u30e9\u30b8\u30a2\u30f3\u3092\u53d6\u308b\u306e\u3067\u89d2\u5ea6\u3092\u30e9\u30b8\u30a2\u30f3\u306b\u5909\u63db
\n \/\/ \u56de\u8ee2\u5f8c\u306e\u30b5\u30a4\u30ba\u8a08\u7b97(\u56db\u6368\u4e94\u5165)
\n $w = round(abs($sw * cos($rad)) + abs($sh * sin($rad)));
\n $h = round(abs($sw * sin($rad)) + abs($sh * cos($rad)));
\n \/\/ \u5b9f\u969b\u306b\u56de\u8ee2\u3055\u305b\u305f\u6642\u306e\u30b5\u30a4\u30ba
\n $im_t =imagerotate($im, $deg, -1);
\n $rw = imagesx($im_t);
\n $rh = imagesy($im_t);
\n imagedestroy($im_t);
\n \/\/ \u6bd4\u8f03
\n if($w != $rw || $h != $rh){
\n echo “$deg: calc($w, $h) != real($rw, $rh) “.”\\n”;
\n }
\n}
\n?>\n<\/p><\/blockquote>\n\u7d50\u679c:\n<\/p>\n
-330: calc(1866, 2232) != real(1867, 2233)
\n-315: calc(2121, 2121) != real(2122, 2122)
\n-300: calc(2232, 1866) != real(2233, 1867)
\n-240: calc(2232, 1866) != real(2233, 1867)
\n-225: calc(2121, 2121) != real(2122, 2122)
\n-210: calc(1866, 2232) != real(1867, 2233)
\n-150: calc(1866, 2232) != real(1867, 2233)
\n-135: calc(2121, 2121) != real(2122, 2122)
\n-120: calc(2232, 1866) != real(2233, 1867)
\n-60: calc(2232, 1866) != real(2233, 1867)
\n-45: calc(2121, 2121) != real(2122, 2122)
\n-30: calc(1866, 2232) != real(1867, 2233)
\n30: calc(1866, 2232) != real(1867, 2233)
\n45: calc(2121, 2121) != real(2122, 2122)
\n60: calc(2232, 1866) != real(2233, 1867)
\n120: calc(2232, 1866) != real(2233, 1867)
\n135: calc(2121, 2121) != real(2122, 2122)
\n150: calc(1866, 2232) != real(1867, 2233)
\n210: calc(1866, 2232) != real(1867, 2233)
\n225: calc(2121, 2121) != real(2122, 2122)
\n240: calc(2232, 1866) != real(2233, 1867)
\n300: calc(2232, 1866) != real(2233, 1867)
\n315: calc(2121, 2121) != real(2122, 2122)
\n330: calc(1866, 2232) != real(1867, 2233)\n<\/p><\/blockquote>\n\u3053\u306e\u7d50\u679c\u304b\u3089\u5224\u65ad\u3057\u3066\u3001
\nimagerotate \u3067\u306f\u5185\u90e8\u7684\u306b ceil \u3067\u7e70\u308a\u4e0a\u3052\u306b\u3057\u3066\u3044\u308b\u3088\u3046\u306a\u306e\u3067
\n\u5358\u7d14\u306b round -> ceil \u306b\u304b\u3048\u3066\u307f\u305f\u3068\u3053\u308d\u3001
\n\u7d50\u679c\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\n<\/p>\n-360: calc(1001, 2001) != real(1000, 2000)
\n-270: calc(2001, 1001) != real(2000, 1000)
\n-180: calc(1001, 2001) != real(1000, 2000)
\n-90: calc(2000, 1001) != real(2000, 1000)\n<\/p><\/blockquote>\nPHP \u306e float \u306e\u7279\u6027(*1)\u304c\u60aa\u3055\u3092\u3057\u3066\u3044\u308b\u306e\u304b\u3001\u5207\u308a\u4e0a\u3052\u51e6\u7406\u3067 GD \u306e\u7d50\u679c\u3068\u98df\u3044\u9055\u3044\u304c\u3067\u304d\u3066\u3057\u307e\u3063\u305f\u3088\u3046\u3067\u3059\u3002
\n\u3068\u3044\u3046\u3053\u3068\u3067\u6b21\u306e\u3088\u3046\u306b\u3059\u308c\u3070\u5b8c\u5168\u306b\u4e00\u81f4\u3057\u307e\u3057\u305f\u3002\n<\/p>\n<?php
\n\/\/ \u56de\u8ee2\u5f8c\u306e\u30b5\u30a4\u30ba\u8a08\u7b97(imagerotate \u4e92\u63db\u306e\u5207\u308a\u4e0a\u3052)
\n$fw = abs($sw * cos($rad)) + abs($sh * sin($rad));
\n$w = ceil(“$fw”); \/\/ \u4e00\u5ea6\u6587\u5b57\u5217\u306b\u3059\u308b
\n$fh = abs($sw * sin($rad)) + abs($sh * cos($rad));
\n$h = ceil(“$fh”); \/\/ \u540c\u4e0a\n<\/p><\/blockquote>\n
\n *1: PHP \u306e float \u306f\u6709\u52b9\u6841\u6570\u3092\u8d85\u3048\u308b\u3068\u8868\u793a\u4e0a\u305d\u306e\u90e8\u5206\u304c\u898b\u3048\u306a\u304f\u306a\u308a\u307e\u3059\u3002\n<\/p>\n$f = 1 + 1E-13;
\necho “$f\\n”; \/\/ 1 \u304c\u8868\u793a\u3055\u308c\u308b
\nif($f > 1){
\n echo “$f > 1\\n”; \/\/ 1 > 1 \u304c\u8868\u793a\u3055\u308c\u308b\u3002
\n}
\necho sprintf(“%.15f”, $f).”\\n”; \/\/ 1.000000000000100 \u304c\u8868\u793a\u3055\u308c\u308b\n<\/p><\/blockquote>\n\n","protected":false},"excerpt":{"rendered":"
imagerotate \u306e\u7d50\u679c\u3092\u8a08\u7b97\u3067\u51fa\u3057\u305f\u3044\u306a\u3068\u601d\u3044\u6b21\u306e\u30b3\u30fc\u30c9\u3067\u691c\u8a3c\u3057\u3066\u307f\u307e\u3057\u305f\u3002 <?php \/\/ \u5bfe\u8c61\u306e\u753b\u50cf\u306e\u30b5\u30a4\u30ba\u3002 $sw = 1000; $sh = 2000; \/\/ \u5b9f\u6e2c\u7528\u306b\u753b\u50cf\u751f\u6210 $im = im … \u7d9a\u304d\u3092\u8aad\u3080 imagerotate \u306e\u5c0f\u6570\u304b\u3089\u6574\u6570\u3078\u306e\u5909\u63db\u4ed5\u69d8<\/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":[],"tags":[32],"class_list":["post-664","post","type-post","status-publish","format-standard","hentry","tag-php"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/664","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/comments?post=664"}],"version-history":[{"count":0,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/664\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/media?parent=664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/categories?post=664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/tags?post=664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}