Canvas如何绘制旋转风车-创新互联

小编给大家分享一下Canvas如何绘制旋转风车，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

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效果图：　

Canvas如何绘制旋转风车

1、定义画布

首先我们现在html文件里面插入




    
    Document

接下来的核心就是在原生JS环境下，绘制风车；通过JS DOM操作方法获取到canvas元素对象，并通过getContex（"2d"）获取2D绘图上下文，通过这个方法就像是要告诉浏览器“我们要在这个画布上绘制2d图形”；







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	请求信息 : 2026-05-19 04:36:01 HTTP/1.1 GET : /article/dcehhp.html
运行时间 : 1.7033s ( Load:0.0066s Init:0.0012s Exec:1.6856s Template:0.0099s )
吞吐率 : 0.59req/s
内存开销 : 2,245.07 kb
查询信息 : 12 queries 5 writes 
文件加载 : 36
缓存信息 : 0 gets 0 writes 
配置加载 : 130
会话信息 : SESSION_ID=de6vb521jtsrhia65f6use5um6
    
    
        
    
	/www/wwwroot/tsicrk.com/index.php ( 1.09 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/ThinkPHP.php ( 4.61 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Think.class.php ( 12.26 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Storage.class.php ( 1.37 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Storage/Driver/File.class.php ( 3.52 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Mode/common.php ( 2.82 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Common/functions.php ( 53.56 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Hook.class.php ( 4.01 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/App.class.php ( 13.49 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Dispatcher.class.php ( 14.79 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Route.class.php ( 13.36 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Controller.class.php ( 11.23 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/View.class.php ( 7.59 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/BuildLiteBehavior.class.php ( 3.68 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ParseTemplateBehavior.class.php ( 3.88 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ContentReplaceBehavior.class.php ( 1.91 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Conf/convention.php ( 11.15 KB )
/www/wwwroot/tsicrk.com/App/Common/Conf/config.php ( 2.14 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Lang/zh-cn.php ( 2.55 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Conf/debug.php ( 1.49 KB )
/www/wwwroot/tsicrk.com/App/Home/Conf/config.php ( 0.31 KB )
/www/wwwroot/tsicrk.com/App/Home/Common/function.php ( 3.33 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ReadHtmlCacheBehavior.class.php ( 5.62 KB )
/www/wwwroot/tsicrk.com/App/Home/Controller/ArticleController.class.php ( 6.02 KB )
/www/wwwroot/tsicrk.com/App/Home/Controller/CommController.class.php ( 1.60 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Model.class.php ( 60.11 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php ( 32.43 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db/Driver/Pdo.class.php ( 16.74 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Cache.class.php ( 3.83 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Cache/Driver/File.class.php ( 5.87 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template.class.php ( 28.16 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template/TagLib/Cx.class.php ( 22.40 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template/TagLib.class.php ( 9.16 KB )
/www/wwwroot/tsicrk.com/App/Runtime/Cache/Home/7540f392f42b28b481b30614275e4e55.php ( 17.71 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/WriteHtmlCacheBehavior.class.php ( 0.97 KB )
/www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ShowPageTraceBehavior.class.php ( 5.24 KB )
    
    
        
    
	[ app_init ] --START--
Run Behavior\BuildLiteBehavior [ RunTime:0.000005s ]
[ app_init ] --END-- [ RunTime:0.000032s ]
[ app_begin ] --START--
Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000289s ]
[ app_begin ] --END-- [ RunTime:0.000315s ]
[ view_parse ] --START--
[ template_filter ] --START--
Run Behavior\ContentReplaceBehavior [ RunTime:0.000054s ]
[ template_filter ] --END-- [ RunTime:0.000077s ]
Run Behavior\ParseTemplateBehavior [ RunTime:0.006692s ]
[ view_parse ] --END-- [ RunTime:0.006720s ]
[ view_filter ] --START--
Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000185s ]
[ view_filter ] --END-- [ RunTime:0.000206s ]
[ app_end ] --START--
    
    
        
    
	1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1
 [ SQL语句 ] : SELECT `id`,`pid`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1  
1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1
 [ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1  
1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1
 [ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( pid= ) 
[8] Undefined index: pid /www/wwwroot/tsicrk.com/App/Home/Controller/ArticleController.class.php 第 47 行.
[8] Undefined index: db_host /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 120 行.
[8] Undefined index: db_port /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 121 行.
[8] Undefined index: db_name /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 122 行.
    
    
        
    
	    
    
        
    
	    
    
    



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Canvas如何绘制旋转风车-创新互联