{"id":260,"date":"2015-02-26T13:41:55","date_gmt":"2015-02-26T05:41:55","guid":{"rendered":"http:\/\/qxu1606620110.my3w.com\/?p=260"},"modified":"2016-10-11T09:36:08","modified_gmt":"2016-10-11T01:36:08","slug":"unity3d%e4%b8%adlayers%e5%92%8clayermask%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"http:\/\/www.u3d8.com\/?p=260","title":{"rendered":"Layers\u548cLayerMask\u89e3\u6790"},"content":{"rendered":"

\u8f6c\u81ea\uff1ahttp:\/\/www.jianshu.com\/p\/89d5252a8b74<\/a><\/span><\/p>\n

Unity\u4e2d\u662f\u7528int32\u6765\u8868\u793a32\u4e2aLayer\u5c42\u3002int32\u8868\u793a\u4e8c\u8fdb\u5236\u4e00\u5171\u670932\u4f4d\uff080\u201431\uff09\u3002
\n\u5728Unity\u4e2d\u53ef\u7f16\u8f91\u7684Layer\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

\u5728Unity\u4e2d\u6bcf\u4e2aGameObject\u90fd\u6709Layer\u5c5e\u6027\uff0c\u9ed8\u8ba4\u7684Layer\u90fd\u662fDefault\u3002\u5728Unity\u4e2d\u53ef\u7f16\u8f91\u7684Layer\u5171\u670924\u4e2a\uff088\u201431\u5c42\uff09\uff0c\u5b98\u65b9\u5df2\u4f7f\u7528\u7684\u662f0\u20147\u5c42\uff0c\u9ed8\u8ba4\u4e0d\u53ef\u7f16\u8f91\uff01<\/p>\n

LayerMask\u5b9e\u9645\u4e0a\u662f\u4e00\u4e2a\u4f4d\u7801\u64cd\u4f5c\uff0c\u5728Unity3D\u4e2d\u4e00\u5171\u670932\u4e2aLayer\u5c42\uff0c\u5e76\u4e14\u4e0d\u53ef\u589e\u52a0\u3002<\/p>\n

\u4f4d\u8fd0\u7b97\u7b26<\/h3>\n

\u6309\u4f4d\u8fd0\u7b97\u7b26\uff1a~\u3001|\u3001&\u3001^<\/code>\u3002\u4f4d\u8fd0\u7b97\u7b26\u4e3b\u8981\u7528\u6765\u5bf9\u4e8c\u8fdb\u5236\u4f4d\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n

\u903b\u8f91\u8fd0\u7b97\u7b26\uff1a&&\u3001||\u3001\uff01\u3002<\/code>\u903b\u8f91\u8fd0\u7b97\u7b26\u628a\u8bed\u53e5\u8fde\u63a5\u6210\u66f4\u590d\u6742\u7684\u590d\u6742\u8bed\u53e5\u3002<\/p>\n

\u6309\u4f4d\u8fd0\u7b97\u7b26\uff1a\u5de6\u79fb\u8fd0\u7b97\u7b26<<<\/code>\uff0c\u5de6\u79fb\u8868\u793a\u4e58\u4ee52\uff0c\u5de6\u79fb\u591a\u5c11\u4f4d\u8868\u793a\u4e58\u4ee52\u7684\u51e0\u6b21\u5e42\u3002<\/p>\n

\u4e3e\u4e2a\u6817\u5b50\uff1a<\/p>\n

var temp = 14 << 2;<\/code> \u8868\u793a\u5341\u8fdb\u5236\u657014\u8f6c\u5316\u4e3a\u4e8c\u8fdb\u5236\u540e\u5411\u5de6\u79fb\u52a82\u4f4d\u3002<\/p>\n

temp\u6700\u540e\u8ba1\u7b97\u7684\u503c\u4e3a 14\u4e58\u4ee52\u7684\u5e73\u65b9\uff0ctemp = 56\uff1b<\/p>\n

\u540c\u7406\uff0c\u53f3\u79fb\u8fd0\u7b97\u7b26>><\/code>\uff0c\u79fb\u52a8\u591a\u5c11\u4f4d\u8868\u793a\u9664\u4ee52\u7684\u51e0\u6b21\u5e42\u3002<\/p>\n

\u5177\u4f53\u53ef\u4ee5\u8f6c\u5230\u535a\u5ba2\uff1a\u6309\u4f4d\u8fd0\u7b97\u7b26<\/a>.<\/p>\n

\u4e0a\u9762\u662f\u4e2a\u57fa\u7840\u77e5\u8bc6\u7684\u8865\u5145\u3002<\/p>\n

\u5728Unity\u4e2d\u662f\u7528LayerMask<\/h3>\n

Layers<\/p>\n

\u5b98\u65b9\u7ed9\u51fa\u7684\u63cf\u8ff0\u662f\uff1aLayers are most commonly used by Cameras to render only a part of the scene, and by Lights to illuminate only parts of the scene. But they can also be used by raycasting to selectively ignore colliders or to create collisions\u3002<\/p>\n

\u7ffb\u8bd1\u4e0b\u5c31\u662f\uff1aLayers\u901a\u5e38\u88ab\u6444\u50cf\u673a\u7528\u6765\u6e32\u67d3\u90e8\u5206\u573a\u666f\uff0c\u548c\u706f\u5149\u7167\u5c04\u90e8\u5206\u573a\u666f\u4f7f\u7528\u3002\u4f46\u662f\u5b83\u4eec\u4e5f\u53ef\u4ee5\u7528\u6765\u505a\u5c04\u7ebf\u68c0\u6d4b\u65f6\u5ffd\u7565\u4e00\u4e9bcollder\u6216Collision\u4f7f\u7528\u3002<\/p>\n

\u5982\u4f55\u7f16\u8f91Layers<\/a>.<\/p>\n

\u5728\u4ee3\u7801\u4e2d\u4f7f\u7528\u65f6\u5982\u4f55\u5f00\u542f\u67d0\u4e2aLayers\uff1f<\/p>\n

LayerMask mask = 1 << \u4f60\u9700\u8981\u5f00\u542f\u7684Layers\u5c42\u3002<\/code><\/p>\n

LayerMask mask = 0 << \u4f60\u9700\u8981\u5173\u95ed\u7684Layers\u5c42\u3002<\/code><\/p>\n

\u4e3e\u51e0\u4e2a\u4e2a\u6817\u5b50\uff1a<\/p>\n

LayerMask mask = 1 << 2; \u8868\u793a\u5f00\u542fLayer2\u3002<\/p>\n

LayerMask mask = 0 << 5;\u8868\u793a\u5173\u95edLayer5\u3002<\/p>\n

LayerMask mask = 1<<2|1<<8;\u8868\u793a\u5f00\u542fLayer2\u548cLayer8\u3002<\/p>\n

LayerMask mask = 0<<3|0<<7;\u8868\u793a\u5173\u95edLayer3\u548cLayer7\u3002<\/p><\/blockquote>\n

\u4e0a\u9762\u4e5f\u53ef\u4ee5\u5199\u6210\uff1a<\/p>\n

LayerMask mask = ~\uff081<<3|1<<7\uff09;\u8868\u793a\u5173\u95edLayer3\u548cLayer7\u3002<\/p>\n

LayerMask mask = 1<<2|0<<4;\u8868\u793a\u5f00\u542fLayer2\u5e76\u4e14\u540c\u65f6\u5173\u95edLayer4.<\/p><\/blockquote>\n

\u4ee3\u7801\uff1a<\/p>\n

using UnityEngine;\r\nusing System.Collections;\r\n\r\npublic class example : MonoBehaviour {\r\n    LayerMask mask =  ~\uff081<<3|1<<7\uff09;\r\n    void Update() {\r\n        if (Physics.Raycast(transform.position, transform.forward, 100, mask.value))\r\n            Debug.Log(\"Hit something\");\r\n\r\n    }\r\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u8f6c\u81ea\uff1ahttp:\/\/www.jianshu.com\/p\/89d5252a8b74 … \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[23],"tags":[64,62,63],"_links":{"self":[{"href":"http:\/\/www.u3d8.com\/index.php?rest_route=\/wp\/v2\/posts\/260"}],"collection":[{"href":"http:\/\/www.u3d8.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.u3d8.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.u3d8.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.u3d8.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=260"}],"version-history":[{"count":4,"href":"http:\/\/www.u3d8.com\/index.php?rest_route=\/wp\/v2\/posts\/260\/revisions"}],"predecessor-version":[{"id":772,"href":"http:\/\/www.u3d8.com\/index.php?rest_route=\/wp\/v2\/posts\/260\/revisions\/772"}],"wp:attachment":[{"href":"http:\/\/www.u3d8.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=260"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.u3d8.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=260"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.u3d8.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=260"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}