{"id":52,"date":"2009-03-25T14:01:48","date_gmt":"2009-03-25T06:01:48","guid":{"rendered":"http:\/\/leegorous.net\/?p=52"},"modified":"2012-03-04T00:46:36","modified_gmt":"2012-03-03T16:46:36","slug":"rectangle-in-canvas","status":"publish","type":"post","link":"http:\/\/leegorous.net\/blog\/2009\/03\/25\/rectangle-in-canvas\/","title":{"rendered":"Canvas\u4e2d\u7684\u77e9\u5f62"},"content":{"rendered":"<p>\u5728canvas\u7684\u4e16\u754c\u91cc\uff0c\u53ea\u6709\u4e00\u79cd\u57fa\u672c\u56fe\u5f62\u2014\u2014\u77e9\u5f62\uff0c\u542c\u8d77\u6765\u5f88\u96be\u4ee5\u60f3\u8c61\u554a\uff0c\u590d\u6742\u7684\u56fe\u5f62\u600e\u4e48\u529e\u5462\uff1f\u5f88\u591a\u65f6\u5019\u590d\u6742\u95ee\u9898\u603b\u6709\u7b80\u5355\u7684\u89e3\u6cd5\u7684\u3002\u6740\u624b\u950f\u5c31\u662f\u8def\u5f84\uff0c\u7528\u8def\u5f84\u548c\u8def\u5f84\u7ec4\u5408\u5c31\u53ef\u4ee5\u7ed8\u5236\u51fa\u76f8\u5f53\u590d\u6742\u7684\u56fe\u5f62\uff0c\u5f88\u6d53\u91cd\u7684\u77e2\u91cf\u5473\u9053\u5662\u3002\u50cf\u5728 Illustrator \u8fd9\u7c7b\u77e2\u91cf\u8bbe\u8ba1\u8f6f\u4ef6\u91cc\uff0c\u8def\u5f84\u5c31\u662f\u4e00\u5207\u7684\u57fa\u7840\u3002\u662f\u4e0d\u662f\u610f\u5473\u7740\uff0ccanvas \u540c\u6837\u662f\u77e2\u91cf\u4e16\u754c\u5462\uff1f<\/p>\n<p>\u8fd8\u662f\u5148\u641e\u5b9a\u4ec5\u6709\u7684\u4e00\u79cd\u57fa\u672c\u56fe\u5f62\u5427\u3002\u6700\u7b80\u5355\u4e0d\u8fc7\u4e0b\u9762\u4e09\u4e2a\u51fd\u6570\uff1a<\/p>\n<pre name=\"code\" class=\"brush: js\">\r\n\/\/ \u7ed8\u5236\u4e00\u4e2a\u65b9\u5757\r\nfillRect(x,y,width,height)\r\n\r\n\/\/ \u7ed8\u5236\u4e00\u4e2a\u77e9\u5f62\u8f6e\u5ed3\r\nstrokeRect(x,y,width,height)\r\n\r\n\/\/ \u6e05\u51fa\u4e00\u4e2a\u900f\u660e\u7684\u77e9\u5f62\u533a\u57df\r\nclearRect(x,y,width,height)\r\n<\/pre>\n<p>\u5176\u4e2dx,y\u662f\u77e9\u5f62\u533a\u57df\u5de6\u4e0a\u89d2\u7684\u4f4d\u7f6e\u3002<\/p>\n<pre name=\"code\" class=\"brush: js\">\r\nfunction draw() {\r\n\tvar canvas = document.getElementById(&#039;myCanvas&#039;);;\r\n\t\r\n\tif (canvas.getContext) {\r\n\t\tvar ctx = canvas.getContext(&#039;2d&#039;);\r\n\t\t\r\n\t\tctx.fillRect(15, 15, 120, 120);\r\n\t\tctx.clearRect(40, 40, 70, 70);\r\n\t\tctx.strokeRect(45, 45, 60, 60);\r\n\t\tctx.strokeRect(50, 50, 50, 50);\r\n\t}\r\n}\r\n<\/pre>\n<p><figure style=\"width: 150px\" class=\"wp-caption alignright\"><img loading=\"lazy\" alt=\"Rectangle in canvas\" src=\"http:\/\/farm4.static.flickr.com\/3550\/3384488100_3fac0cfd1e_o.png\" title=\"Rectangle in canvas\" width=\"150\" height=\"150\" \/><figcaption class=\"wp-caption-text\">Rectangle in canvas<\/figcaption><\/figure>\u4ee3\u7801\u53ef\u4ee5\u653e\u5728 <a href=\"http:\/\/leegorous.net\/2009\/03\/20\/intro-to-canvas\/\">\u8fdb\u9a7bCanvas<\/a> \u91cc\u66fe\u7ecf\u7528\u8fc7\u9875\u9762\u6a21\u677f\u91cc\u6267\u884c\u3002<\/p>\n<p>\u5728 canvas \u4e0a\uff0c\u9996\u5148\u586b\u5145\u4e86\u4e00\u4e2a 120&#215;120 \u7684\u9ed1\u8272\uff08\u9ed8\u8ba4\u8272\uff09\u65b9\u5757\uff0c\u6e05\u51fa\u4e2d\u95f4\u5e76\u5728\u5176\u5185\u52fe\u753b\u51fa\u53cc\u8fb9\u77e9\u5f62\uff0c\u770b\u4e0a\u53bb\u548c\u53f3\u8fb9\u7684\u56fe\u5f62\u662f\u4e00\u81f4\u7684\u3002<\/p>\n<p>\u662f\u7531\u70b9\u7ec4\u6210\u7684\uff0c\u4f46\u4e00\u5f00\u59cb\u5c31\u7ed8\u5236\u9762\u4e86\uff0c\u90a3\u4e48\u5982\u4f55\u7ed8\u5236\u70b9\u5462\uff1f\u5176\u5b9e\uff0c\u5c4f\u5e55\u4e0a\u7684\u50cf\u7d20\u70b9\u4e5f\u662f\u4e00\u4e2a\u77e9\u5f62\uff0c\u753b\u4e00\u4e2a 1&#215;1 \u7684\u77e9\u5f62\u5c31\u662f\u70b9\u4e86\u3002\u7528 <em>fillRect<\/em> \u548c <em>strokeRect <\/em>\u90fd\u53ef\u4ee5\uff0c\u4f46\u662f\u6709\u4e00\u70b9\u533a\u522b\uff0c<em>fillRect <\/em>\u53ef\u4ee5\u51c6\u786e\u7684\u586b\u5145\u51fa\u4e00\u4e2a\u50cf\u7d20\u70b9\uff0c\u800c\u7528 <em>strokeRect <\/em>\u5219\u53ef\u4ee5\u5f97\u5230\u4e00\u4e2a\u89c6\u89c9\u4e0a\u7684\u70b9\uff0c\u8fb9\u7f18\u662f\u6a21\u7cca\u7684\u3002\u540c\u6837\uff0c\u5982\u679c\u5e0c\u671b\u77e9\u5f62\u5757\u7684\u8fb9\u7f18\u662f\u9510\u5229\u7684\uff0c\u4f7f\u7528 <em>fillRect <\/em>\u800c\u4e0d\u662f <em>strokeRect <\/em>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728canvas\u7684\u4e16\u754c\u91cc\uff0c\u53ea\u6709\u4e00\u79cd\u57fa\u672c\u56fe\u5f62\u2014\u2014\u77e9\u5f62\uff0c\u542c\u8d77\u6765\u5f88\u96be\u4ee5\u60f3\u8c61\u554a\uff0c\u590d\u6742\u7684\u56fe\u5f62\u600e\u4e48\u529e\u5462\uff1f\u5f88\u591a\u65f6\u5019\u590d\u6742\u95ee\u9898\u603b\u6709 &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/leegorous.net\/blog\/2009\/03\/25\/rectangle-in-canvas\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201cCanvas\u4e2d\u7684\u77e9\u5f62\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[5,4],"_links":{"self":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts\/52"}],"collection":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/comments?post=52"}],"version-history":[{"count":5,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts\/52\/revisions"}],"predecessor-version":[{"id":1078,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts\/52\/revisions\/1078"}],"wp:attachment":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/media?parent=52"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/categories?post=52"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/tags?post=52"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}