{"id":322039,"date":"2021-02-05T17:41:16","date_gmt":"2021-02-05T09:41:16","guid":{"rendered":"http:\/\/4563.org\/?p=322039"},"modified":"2021-02-05T17:41:16","modified_gmt":"2021-02-05T09:41:16","slug":"%e5%ae%89%e5%8d%93%e8%83%bd%e5%af%b9%e6%b5%8f%e8%a7%88%e5%99%a8%e5%88%b7%e6%96%b0%e7%8e%87%e9%94%81%e5%b8%a7%e5%90%97-h5-requestanimationframe-%e5%8a%a8%e7%94%bb%e4%bc%9a%e9%9a%8f%e7%9d%80%e5%88%b7","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=322039","title":{"rendered":"\u5b89\u5353\u80fd\u5bf9\u6d4f\u89c8\u5668\u5237\u65b0\u7387\u9501\u5e27\u5417 h5 requestAnimationFrame \u52a8\u753b\u4f1a\u968f\u7740\u5237\u65b0\u7387\u6539\u53d8\u901f\u5ea6"},"content":{"rendered":"
\n
\n
\n

\u5b89\u5353\u80fd\u5bf9\u6d4f\u89c8\u5668\u5237\u65b0\u7387\u9501\u5e27\u5417 h5 requestAnimationFrame \u52a8\u753b\u4f1a\u968f\u7740\u5237\u65b0\u7387\u6539\u53d8\u901f\u5ea6 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : wdspro <\/span> <\/i> 9<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u5982\u9898 \u4e00\u4e2a\u5b89\u5353 h5 \u5185\u7f6e\u7684\u52a8\u753b \u7528\u5230\u4e86 requestAnimationFrame \u9047\u5230\u9ad8\u5237\u624b\u673a \u7279\u522b\u662f\u8bbe\u7f6e\u4e86 \u52a8\u6001\u9ad8\u5237\u7684\u8bbe\u7f6e \u5728\u5c4f\u5e55\u6309\u538b\u7684\u65f6\u5019\u81ea\u52a8\u8fdb\u5165\u9ad8\u5237 \u7136\u540e\u9875\u9762\u52a8\u753b\u5c31\u53d8\u901f\u4e86 \u60f3\u95ee\u4e0b\u6709\u6ca1\u6709\u80fd\u9650\u5236 \u6216 \u9501\u4f4f\u5e94\u7528\u5237\u65b0\u7387\u7684 \u53c8\u6216\u8005\u662f h5 \u6709\u6ca1\u6709\u56fa\u5b9a fps \u7684 \u611f\u8c22<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (18<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : 1OF7G <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6839\u636e\u65f6\u95f4\u5728 requestAnimationFrame \u8ba1\u7b97\u4e0b\u4e00\u5e27\u7684\u4f4d\u7f6e\u5927\u5c0f\u7b49\u53c2\u6570\uff0c\u800c\u4e0d\u662f\u6839\u636e\u8c03\u7528\u6b21\u6570\u6bcf\u6b21 currentpos.x+2px \u8fd9\u6837\u6839\u636e\u5f53\u524d\u5e27\u4fee\u6539 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : muzuiget <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    requestAnimationFrame \u672c\u6765\u5c31\u662f\u90a3\u6837\u7528\u7684\uff0c\u4f60\u5e94\u8be5\u5728\u56de\u8c03\u51fd\u6570\u91cc\u53d6\u90a3\u4e2a\u65f6\u95f4\u53c2\u6570\uff0c\u7136\u540e\u6839\u636e\u65f6\u95f4\u5dee\u6765\u8ba1\u7b97\u7ed8\u56fe\u901f\u5ea6\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : soulmt <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u56fa\u5b9a\u7684 fps \u662f\u4e0d\u5b58\u5728\u7684…. requestAnimationFrame \u53ea\u662f\u8ba9\u4f60\u4e00\u5e27\u6539\u4e00\u6b21, \u4f60\u53ef\u4ee5\u4f7f\u7528 requestIdleCallback \u6765\u63a7\u5236\u4f60\u6bcf\u4e00\u6b21\u6e32\u67d3\u548c\u65f6\u95f4\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5c31\u7b97\u662f\u9ad8\u5237\uff0c\u90a3\u4e48\u65e0\u975e\u6bcf\u4e00\u5e27\u53d8\u5316\u7684\u503c\u5c0f\u4e86\uff0c\u4f46\u662f\u79bb\u4f60\u771f\u6b63\u9884\u8bbe\u7684\u52a8\u753b\u65f6\u95f4\u548c\u8ddd\u79bb\uff0c\u4e0d\u4f1a\u53d1\u751f\u6539\u53d8\uff0c\u5c31\u6bd4\u5982\u4f60\u672c\u6765 60fps \u7684\u65f6\u5019\u4e00\u6b21\u8d70 10px\uff0c\u9ad8\u5237\u5728 120fps \u7684\u65f6\u5019\u4e00\u6b21\u53ea\u8d70 5px\uff0c <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : fengjianxinghun <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6309\u5e27\u7387\u8ba1\u7b97\u903b\u8f91 \u00d7
    \u6309\u65f6\u95f4\u8ba1\u7b97\u903b\u8f91 \u221a<\/p>\n

    \u5e27\u7387\u65e0\u5173\u52a8\u753b <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : wdspro <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @1OF7G \u73b0\u5728\u7684\u52a8\u753b\u5c31\u662f\u8fd9\u6837\u7684 \u6bcf\u56de\u8c03\u4e00\u6b21 x + speed \u6765\u6e32\u67d3\u52a8\u753b \u5bfc\u81f4\u9ad8\u5237\u65b0\u7387\u7684\u65f6\u5019\u901f\u5ea6\u5feb \u6027\u80fd\u5dee\u7684\u624b\u673a fps \u4f4e\u7684\u65f6\u5019\u4e00\u5361\u4e00\u5361\u7684<\/p>\n

    @muzuiget \u5177\u4f53\u53ef\u4ee5\u8bb2\u4e00\u4e0b\u5417 \u65f6\u95f4\u5dee\u662f\u6307\u7684\u4ec0\u4e48\u65f6\u95f4\u5dee<\/p>\n

    @soulmt \u662f\u8981\u5148\u7b97\u51fa fps \u7136\u540e \u518d\u6839\u636e fps \u6765\u7b97\u6bcf\u5e27\u9700\u8981\u8d70\u7684\u8ddd\u79bb\u662f\u5417 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : fengjianxinghun <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wdspro \u4f60\u8981\u5fd8\u8bb0\u6709 FPS \u8fd9\u4e2a\u4e1c\u897f\uff0c\u5f53\u4ed6\u4e0d\u5b58\u5728\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : wdspro <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @fengjianxinghun \u901a\u8fc7\u4e0a\u9762\u5e27\u95f4\u5dee\u7684\u65b9\u5f0f\u5b9e\u73b0\u4e86\u4e0d\u540c\u5237\u65b0\u7387\u4e0b\u901f\u5ea6\u76f8\u540c\u7684\u5b9e\u73b0 \u73b0\u5728\u66f4\u591a\u7684\u95ee\u9898\u662f\u4f1a\u4e0d\u5fc5\u73b0\u7684\u76f4\u63a5\u5361\u6b7b\u51e0\u79d2\u949f \u5c31\u662f\u4e24\u5e27\u4e4b\u95f4\u95f4\u9694 5~6s \u949f canvas \u7684\u6027\u80fd\u8fd9\u4e48\u5dee\u5417 \u8fd8\u662f\u8bf4\u6709\u5176\u4ed6\u7684\u4f18\u5316\u9879\u6ca1\u6709\u505a\u5230 \u6700\u5f00\u59cb\u7684\u6bcf\u5e27\u6e05\u7a7a\u753b\u5e03 \u4e3b\u8981\u5c31\u662f\u7528\u7684\u8fd9\u4e2a drawImage \u6587\u4e2d\u6709\u63d0\u5230\u5750\u6807\u53bb\u6d6e\u70b9 \u4f46\u662f\u8fd9\u4e2a\u662f 10 \u5e74\u524d\u7684\u4e86 \u4e0d\u77e5\u9053 canvas \u6709\u6ca1\u6709\u9488\u5bf9\u4f18\u5316 https:\/\/seblee.me\/2011\/02\/html5-canvas-sprite-optimisation\/ <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : wdspro <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e5f\u5c1d\u8bd5\u4e86\u5728\u6240\u6709\u7d20\u6750\u5f00\u59cb\u6e38\u620f\u524d\u7684 \u90e8\u5206\u9884\u6e32\u67d3 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : fengjianxinghun <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wdspro <\/p>\n

    canvas \u6027\u80fd\u5728\u51e0\u79cd\u6280\u672f\u4e2d\u662f\u6700\u5dee\u7684\u3002
    \u66ff\u4ee3\u9009\u62e9
    1. css \u52a8\u753b
    2. webgl <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : wdspro <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @fengjianxinghun \u8fd9\u6837\u7684\u5417 \u9009\u578b\u6280\u672f\u7684\u65f6\u5019 \u6700\u5f00\u59cb\u5c31\u662f\u820d\u5f03\u4e86 css3 webgl \u9002\u5408\u505a\u5c0f\u6e38\u620f\u5417 \u6709\u5408\u9002\u6848\u4f8b\u5417 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : soulmt <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wdspro fps \u4e0d\u7528\u7ba1\uff0c \u6bcf\u4e00\u5e27\u6e32\u67d3\u6d4f\u89c8\u5668\u4f1a\u901a\u8fc7 requestIdleCallback \u544a\u8bc9\u4f60\u8fd9\u4e00\u5e27\u8fd8\u6709\u591a\u5c11\u65f6\u95f4\u662f\u7a7a\u95f2\u7684\uff0c\u6bd4\u5982\u6d4f\u89c8\u5668\u5904\u7406 5ms \u90a3\u4e48\u5728 60 \u5e27\u7684\u65f6\u5019\uff0c\u4f60\u80fd\u62ff\u5230\u7684\u65f6\u95f4\u5206\u7247\u5c31\u662f 11.7ms \uff0c \u5982\u679c\u662f 120 \u5e27\u7684\u8bdd\uff0c\u4f60\u62ff\u5230\u7684\u65f6\u95f4\u53ef\u80fd\u662f 3.3ms \uff0c\u90a3\u4e48\uff0c\u5047\u8bbe\u4f60\u7684\u52a8\u753b\u662f\u8d70 100px \u9700\u8981 100ms\uff0c\u90a3\u4e48\u901f\u5ea6\u5c31\u662f 1px\/ms\uff0c \u90a3\u4e48\u5728\u4e0a\u8ff0\u6761\u4ef6\u4e0b\uff0c\u5982\u679c\u7ed9\u4f60 11.7ms \u90a3\u4e48\u4f60\u5c31\u8d70 11.7px \uff0c\u5728 120 \u5e27\u7684\u65f6\u5019\u7ed9\u4f60 3.3ms \u4f60\u5c31\u8d70 3.3px \uff0c \u8fd9\u4e2a\u65f6\u95f4\u662f\u6d4f\u89c8\u5668\u7ed9\u4f60\u7684\u65f6\u95f4\uff0c\u53ef\u4ee5\u4e0d\u7528\u7ba1\u5177\u4f53\u5e27\u6570\u662f\u591a\u5c11\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : fengjianxinghun <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wdspro 5 \u5e74\u524d\u505a h5 \u624b\u6e38\u7684\u65f6\u5019\uff0c\u5f53\u65f6 webgl \u666e\u53ca\u7387\u4e0d\u9ad8\uff0c\u5f15\u64ce\u662f\u7eaf canvas \u5199\u7684\u6162\u7684\u8981\u6b7b\uff0c\u90e8\u5206\u5185\u5bb9\u5c31\u7528 html\/css3 \u52a8\u753b\u4ee3\u66ff\u4f18\u5316\u3002webgl \u505a 3d \u6e38\u620f\u90fd\u591f\u4e86\u4f55\u51b5\u5c0f\u6e38\u620f\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : wszgrcy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @fengjianxinghun \u4f46\u662f webgl \u4e5f\u662f\u7ed8\u5236\u5728 canvas \u4e0a\u7684…..\u4f60\u6307\u7684\u662f\u9ed8\u8ba4\u7684\u90a3\u79cd canvas context 2d \u7684\u5417? <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : fengjianxinghun <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wszgrcy \u5bf9 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : fengjianxinghun <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wdspro \u627e\u4e2a\u6210\u719f h5 \u6e38\u620f\u5f15\u64ce\u5427\uff0c\u6bd4\u5982 cocos \u4e4b\u7c7b\u7684\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : wdspro <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wszgrcy \u662f\u7684 context 2d \u7684<\/p>\n

    @soulmt \u662f\u7684 \u73b0\u5728\u662f\u6309\u7167\u8fd9\u6837\u7684\u601d\u8def\u8fbe\u5230\u4e86 \u6240\u6709\u5237\u65b0\u7387\u4e00\u4e2a\u901f\u5ea6\u503c\u4e86 \u4f46\u662f\u73b0\u5728\u5c31\u662f\u6027\u80fd\u6709\u95ee\u9898 \u4f1a\u7206\u6389\u7684\u6837\u5b50 \u4e24\u4e2a\u5e27\u4e4b\u95f4 \u6709\u65f6\u5019\u4f1a\u8fbe\u5230\u51e0\u79d2\u949f \u5728\u7b49\u4e0b\u4e00\u6b21\u6e32\u67d3\u7684\u65f6\u5019\u6211\u7684\u9875\u9762\u72b6\u6001\u662f\u76f4\u63a5\u5361\u4f4f\u7684 \u73b0\u5728\u5176\u5b9e\u5c31\u53ea\u7528\u5230\u4e86 ctx.drawImage \u540c\u5c4f\u4e00\u4e2a\u80cc\u666f\u56fe \u51e0\u4e2a\u9053\u5177 \u52a0\u4eba\u7269\u52a8\u6001\u56fe\u5728\u6e32\u67d3 \u6211\u60f3\u4e0d\u51fa\u662f\u9700\u8981\u4f18\u5316\u4ec0\u4e48\u5730\u65b9 \u56fe\u5df2\u7ecf\u538b\u7f29\u5230\u6781\u9650\u4e86 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : wdspro <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @fengjianxinghun \u6709\u8003\u8651 \u4f46\u662f\u73b0\u5728\u5df2\u7ecf\u5230\u4e86\u5feb\u9a8c\u6536\u9636\u6bb5\u4e86 \u4e00\u65f6\u95f4\u60f3\u7740\u5148\u4f18\u5316\u8fc7\u53bb \u6682\u65f6\u6ca1\u65f6\u95f4\u6298\u817e\u4e86 \u53ea\u80fd\u540e\u9762\u6709\u65f6\u95f4\u7814\u7a76\u7814\u7a76\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : fengjianxinghun <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wdspro \u80cc\u666f\u56fe\u4e4b\u7c7b\u7684\u9759\u6001\u90e8\u5206\u80fd\u7528 html \u7684\u5c31\u7528 html\uff0c\u4e0d\u8981\u7528 ctx.drawimage \u6bcf\u5e27 draw<\/p>\n

    webgl \u53ef\u4ee5 batch draw \u8282\u7ea6 drawcall count\uff0ccontext 2d \u4e0d\u884c\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n","protected":false},"excerpt":{"rendered":"

    \u5b89\u5353\u80fd\u5bf9\u6d4f\u89c8\u5668\u5237\u65b0\u7387\u9501\u5e27\u5417 h5 …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/322039"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=322039"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/322039\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=322039"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=322039"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=322039"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}