{"id":75,"date":"2025-01-12T06:28:36","date_gmt":"2025-01-11T22:28:36","guid":{"rendered":"http:\/\/www.53youxi.cn\/?p=75"},"modified":"2025-01-12T06:28:36","modified_gmt":"2025-01-11T22:28:36","slug":"cocos-creator%e6%96%b9%e5%90%91%e4%b8%8e%e8%a7%92%e5%ba%a6%e8%bd%ac%e6%8d%a2","status":"publish","type":"post","link":"https:\/\/www.53youxi.cn\/?p=75","title":{"rendered":"Cocos Creator\u65b9\u5411\u4e0e\u89d2\u5ea6\u8f6c\u6362"},"content":{"rendered":"\n<p>1\u3001\u8ba9\u4e00\u4e2a\u5bf9\u8c61\u671d\u7740\u4ed6\u7684\u65b9\u5411\u79fb\u52a8<\/p>\n\n\n\n<p>cc.Node\u8282\u70b9\u7684rotation\u662f\u4e00\u4e2a\u89d2\u5ea6\uff0c\u56e0\u6b64\uff0c\u6211\u4eec\u4e3a\u4e86\u5b9e\u73b0\u8fd9\u4e2a\u76ee\u6807\uff0c\u9996\u5148\u8981\u6839\u636erotation\u6c42\u51fa\u4ed6\u7684dir\u65b9\u5411\uff0c\u5c31\u597d\u529e\u4e86\u3002\u793a\u4f8b\u4ee3\u7801:<\/p>\n\n\n\n<p>update(dt){<br>\/\/\u7531\u4e8eMath\u51fd\u6570\u63a5\u53d7\u7684\u662f\u5b64\u5ea6\uff0c\u6240\u4ee5\u6211\u4eec\u5148\u8282\u8282\u70b9\u7684\u65cb\u8f6c\u8f6c\u5316\u4e3a\u5f27\u5ea6<br>var angle = this.node.rotation \/ 180 * Math.PI;<br>\/\/\u5408\u6210\u57fa\u4e8e X\u6b63\u65b9\u5411\u7684\u65b9\u5411\u5411\u91cf<br>var dir = cc.v2(Math.cos(angle),Math.sin(angle));<br>\/\/\u5355\u4f4d\u5316\u5411\u91cf<br>dir.normalizeSelf();<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    \/\/\u6839\u636e\u65b9\u5411\u5411\u91cf\u79fb\u52a8\u4f4d\u7f6e\n    var moveSpeed = 100;\n    this.node.x += dt * dir.x * moveSpeed;\n    this.node.y += dt * dir.y * moveSpeed;<\/code><\/pre>\n\n\n\n<p>}<\/p>\n\n\n\n<p>2\u3001\u8ba9\u4e00\u4e2a\u5bf9\u8c61\u671d\u5411\u53e6\u4e00\u4e2a\u5bf9\u8c61<\/p>\n\n\n\n<p>\u901a\u8fc7\u9ad8\u4e2d\u6570\u5b66\u6211\u4eec\u53ef\u4ee5\u77e5\u9053\uff0c A\u5230B\u7684\u5411\u91cf = B\u70b9 &#8211; A\u70b9\u3002 \u90a3\u6211\u4eec\u53ea\u9700\u8981\u5c06\u76ee\u6807\u5bf9\u8c61\u7684\u4f4d\u7f6e &#8211; \u81ea\u5df1\u7684\u4f4d\u7f6e\uff0c\u5373\u53ef\u5f97\u5230\u65b9\u5411\u5411\u91cf\u3002<\/p>\n\n\n\n<p>\u65b9\u5411\u5411\u91cf\u8f6c\u6362\u4e3a\u89d2\u5ea6\uff0c\u9700\u8981\u8ba4\u6e05\u4e00\u4e2a\u9690\u542b\u53d8\u91cf\uff0c\u5c31\u662f\u8fd9\u4e2a\u89d2\u5ea6\u7684\u57fa\u51c6\u662f X \u8f74\u6b63\u65b9\u5411\u3002 \u4f7f\u7528\u5411\u91cf\u6765\u8868\u793a\u5c31\u662f (1,0)\u3002<\/p>\n\n\n\n<p>cc.Vec2\u63d0\u4f9b\u4e86\u4e24\u4e2a\u51fd\u6570 cc.Vec2.angle\u548ccc.Vec2.signAngle\uff0c \u540e\u8005\u76f8\u6bd4\u524d\u8005\u6765\u8bf4\uff0c\u540e\u8005\u4ea7\u751f\u7684\u89d2\u5ea6\u662f\u6709\u7b26\u53f7\u7684\uff0c\u800c\u524d\u8005\u4f1a\u6c38\u8fdc\u4e3a\u6b63\u3002 \u6211\u4eec\u4f7f\u7528cc.Vec2.signAngle\u6765\u5c06\u65b9\u5411\u5411\u91cf\u8f6c\u6362\u4e3a\u5f27\u5ea6\u3002 \u5177\u4f53\u64cd\u4f5c\u8bf7\u770b\u4ee3\u7801\u3002<\/p>\n\n\n\n<p>function lookAtObj(target){<br>\/\/\u8ba1\u7b97\u51fa\u671d\u5411<br>var dx = target.x &#8211; this.node.x;<br>var dy = target.y &#8211; this.node.y;<br>var dir = cc.v2(dx,dy);<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    \/\/\u6839\u636e\u671d\u5411\u8ba1\u7b97\u51fa\u5939\u89d2\u5f27\u5ea6\n    var angle = dir.signAngle(cc.v2(1,0));\n\n    \/\/\u5c06\u5f27\u5ea6\u8f6c\u6362\u4e3a\u6b27\u62c9\u89d2\n    var degree = angle \/ Math.PI * 180;\n\n    \/\/\u8d4b\u503c\u7ed9\u8282\u70b9\n    this.node.rotation = degree;<\/code><\/pre>\n\n\n\n<p>}<br><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u7248\u6743\u58f0\u660e\uff1a\u672c\u6587\u4e3a\u535a\u4e3b\u539f\u521b\u6587\u7ae0\uff0c\u9075\u5faa CC 4.0 BY-SA \u7248\u6743\u534f\u8bae\uff0c\u8f6c\u8f7d\u8bf7\u9644\u4e0a\u539f\u6587\u51fa\u5904\u94fe\u63a5\u548c\u672c\u58f0\u660e\u3002<\/code><\/pre>\n\n\n\n<p>\u539f\u6587\u94fe\u63a5\uff1ahttps:\/\/blog.csdn.net\/j18715117601\/article\/details\/137916626<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001\u8ba9\u4e00\u4e2a\u5bf9\u8c61\u671d\u7740\u4ed6\u7684\u65b9\u5411\u79fb\u52a8 cc.Node\u8282\u70b9\u7684rotation\u662f\u4e00\u4e2a\u89d2\u5ea6\uff0c\u56e0\u6b64\uff0c\u6211\u4eec\u4e3a\u4e86\u5b9e\u73b0\u8fd9\u4e2a\u76ee\u6807\uff0c\u9996&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-75","post","type-post","status-publish","format-standard","hentry","category-2"],"_links":{"self":[{"href":"https:\/\/www.53youxi.cn\/index.php?rest_route=\/wp\/v2\/posts\/75","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.53youxi.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.53youxi.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.53youxi.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.53youxi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=75"}],"version-history":[{"count":1,"href":"https:\/\/www.53youxi.cn\/index.php?rest_route=\/wp\/v2\/posts\/75\/revisions"}],"predecessor-version":[{"id":76,"href":"https:\/\/www.53youxi.cn\/index.php?rest_route=\/wp\/v2\/posts\/75\/revisions\/76"}],"wp:attachment":[{"href":"https:\/\/www.53youxi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=75"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.53youxi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=75"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.53youxi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=75"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}