{"id":2288,"date":"2020-07-13T10:58:36","date_gmt":"2020-07-13T02:58:36","guid":{"rendered":"https:\/\/www.clonefactor.com\/wordpress\/?p=2288"},"modified":"2020-07-13T18:46:21","modified_gmt":"2020-07-13T10:46:21","slug":"local-world-space-%e7%a9%ba%e9%96%93","status":"publish","type":"post","link":"https:\/\/www.clonefactor.com\/wordpress\/program\/math\/2288\/","title":{"rendered":"Local \/ World Space \u7a7a\u9593"},"content":{"rendered":"\n<p>Local space \u53c8\u7a31\u4f5c Object space \u662f\u500b\u4eba\u7a7a\u9593.<br>World space \u5247\u662f\u4e16\u754c\u7a7a\u9593<\/p>\n<p>\u6240\u8b02\u7684\u7a7a\u9593\u8f49\u63db\u5ff5\u5f88\u7c21\u55ae.<br>\u5148\u7406\u89e3\u4e0b\u9762\u7684\u65b9\u5411\u6982\u5ff5 :<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"619\" height=\"556\" src=\"https:\/\/www.clonefactor.com\/wordpress\/wp-content\/uploads\/2020\/07\/LocalWorld_Align.jpg\" alt=\"\" class=\"wp-image-2289\" srcset=\"https:\/\/www.clonefactor.com\/wordpress\/wp-content\/uploads\/2020\/07\/LocalWorld_Align.jpg 619w, https:\/\/www.clonefactor.com\/wordpress\/wp-content\/uploads\/2020\/07\/LocalWorld_Align-300x269.jpg 300w, https:\/\/www.clonefactor.com\/wordpress\/wp-content\/uploads\/2020\/07\/LocalWorld_Align-334x300.jpg 334w\" sizes=\"auto, (max-width: 619px) 100vw, 619px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">N = North<br>E = East<br>S = South<br>W = West<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">F = Forward<br>R = Right<br>B = Back<br>L = Left<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8a2d\u9019\u88e1\u7684 Object space \u8ddf World space \u662f\u65b9\u5411\u4e00\u81f4\u7684<br>\u4f60\u7684\u53f3\u624b\u6307\u8457\u897f\u65b9(L=W), \u5de6\u624b\u6307\u8457\u6771\u65b9(R=E), \u9762\u5c0d\u5317\u65b9(F=N)<br>\u9700\u7136\u4ee3\u8868\u7684\u65b9\u4f4d\u4e0d\u540c, \u4f46\u5b83\u5011\u90fd\u662f\u6307\u5411\u540c\u4e00\u500b\u65b9\u5411\u7684.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8f49\u63db<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6211\u5011\u628a\u4eba\u7269\u7684\u9762\u5411\u6cbf Y \u8ef8\u8f49\u500b 45 \u5ea6.<br>\u8b8a\u6210\u4e0b\u5716\u7684\u6a23\u5b50, \u9019\u500b\u6642\u5019\u7a7a\u9593\u8f49\u63db\u7684\u6982\u5ff5\u5c31\u8981\u61c9\u7528\u4e0a.<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-1 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"635\" height=\"578\" src=\"https:\/\/www.clonefactor.com\/wordpress\/wp-content\/uploads\/2020\/07\/LocalWorld_Twist.jpg\" alt=\"\" data-id=\"2290\" data-full-url=\"https:\/\/www.clonefactor.com\/wordpress\/wp-content\/uploads\/2020\/07\/LocalWorld_Twist.jpg\" data-link=\"https:\/\/www.clonefactor.com\/wordpress\/?attachment_id=2290\" class=\"wp-image-2290\" srcset=\"https:\/\/www.clonefactor.com\/wordpress\/wp-content\/uploads\/2020\/07\/LocalWorld_Twist.jpg 635w, https:\/\/www.clonefactor.com\/wordpress\/wp-content\/uploads\/2020\/07\/LocalWorld_Twist-300x273.jpg 300w, https:\/\/www.clonefactor.com\/wordpress\/wp-content\/uploads\/2020\/07\/LocalWorld_Twist-330x300.jpg 330w\" sizes=\"auto, (max-width: 635px) 100vw, 635px\" \/><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p>\u5982\u5716, \u9019\u500b\u6642\u5019, \u4eba\u7269\u7684\u6b63\u524d\u65b9 &#8220;F&#8221; \u6307\u8457\u7684\u65b9\u5411\u662f &#8220;NE&#8221;<br>\u6240\u4ee5 Local space.foward \u5c31\u662f world \u7684 NE \u65b9.&nbsp;<br>\u9019\u5c31\u662f Local \u8f49\u63db\u70ba World<br>\u540c\u7406\u5982\u679c\u6211\u5011\u8981\u628a World \u7684 &#8220;S&#8221; \u8f49\u63db\u70ba Local \u7684\u8a71\u5c31\u662f &#8220;RB&#8221; \u4e86.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u90a3\u5236\u4f5c\u904a\u6232\u6642\u70ba\u751a\u9ebc\u91cd\u8981?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8a2d\u4f60\u5e0c\u671b\u4eba\u7269\u5411\u67d0\u500b\u65b9\u5411\u79fb\u52d5, \u4e00\u822c\u4f86\u8aaa\u6211\u5011\u5728\u505a\u9019\u500b\u529f\u80fd\u662f\u5e0c\u671b. e.g. \u4eba\u7269\u4ee5 F \u7684\u65b9\u5411\u8dd1<br>\u4f46\u5be6\u969b\u6211\u5011\u9700\u8981\u6c42\u5f97\u5728\u4e16\u754c\u5750\u6a19\u4e0b\u7684\u65b9\u5411\u624d\u80fd\u8dd1. \u9019\u662f\u56e0\u70ba\u904a\u6232\u7684\u5750\u6a19\u7cfb\u7d71\u662f\u4ee5\u4e16\u754c\u5750\u6a19\u70ba\u6e96\u7684&#8230;(\u5ee2\u8a71).<br>\u6240\u4ee5 vector \u7684\u8f49\u63db\u5c31\u986f\u5f97\u91cd\u8981\u4e86.<br>\u771f\u8981\u4e86\u89e3\u7684\u8a71\u5148\u8981\u61c2\u751a\u9ebc sin\/cos \u8ddf Matrix \u7684\u9663\u5217\u904b\u7b97&#8230;\u4f46\u904a\u6232\u5f15\u64ce\u901a\u5e38\u6703\u628a\u9019\u4e9b\u90fd\u6253\u5305\u597d\u65b9\u4fbf\u88fd\u4f5c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5 Unity3D \u70ba\u4f8b, <a rel=\"noreferrer noopener\" href=\"https:\/\/docs.unity3d.com\/ScriptReference\/Transform.TransformDirection.html\" target=\"_blank\">Transform.TransformDirection<\/a> \u8ddf <a rel=\"noreferrer noopener\" href=\"https:\/\/docs.unity3d.com\/ScriptReference\/Transform.InverseTransformDirection.html\" target=\"_blank\">Transform.InverseTransformDirection<\/a> \u5c31\u662f\u7528\u4f86\u8f49\u63db\u7684 API<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9019\u500b\u5716\u7528\u770b\u7684\u597d\u50cf\u5f88\u5bb9\u6613\u7406\u89e3, \u4f46\u5728\u6578\u5b78\u4e0a\u4e1f\u662f\u5b8c\u5168\u4e0d\u540c\u7684.<br>\u4ee5\u500b\u4eba\u5750\u6a19 Local space \u4f86\u770b\u7684\u8a71<br>\u5411\u524d\u8d70 1 unit \u662f\u7528 xyz = {0f, 0f, 1f} \u4f86\u4ee3\u8868.<br>\u4f46\u5728\u4e0a\u5716\u7684\u60c5\u6cc1 (Y 45 \u5ea6\u7684\u8f49\u5411\u4e0b) \u628a\u5b83\u8f49\u70ba\u4e16\u754c\u5750\u6a19 World space \u5176\u5be6\u6211\u5011\u9700\u8981\u79fb\u52d5\u7684\u662f<br>\u5411 NE \u8d70 1 unit \u5373\u662f xyz = {0.7f, 0f, 0.7f}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PS: \u53ef\u4ee5\u53c3\u8003\u4e00\u4e0b <a href=\"https:\/\/www.clonefactor.com\/wordpress\/program\/unity3d\/devlog\/2042\/\">\u6211\u7684\u4eba\u5f62\u63a7\u5236\u958b\u767c\u7b46\u8a18(\u4e00) Locomotion<\/a> \u6709\u66f4\u591a\u95dc\u65bc\u8996\u9ede\u8ddf\u8f38\u5165\u65b9\u5411\u7684\u8f49\u63db.<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Local space \u53c8\u7a31\u4f5c Object space \u662f\u500b\u4eba\u7a7a\u9593.World space \u5247\u662f\u4e16 &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[78],"tags":[112],"class_list":["post-2288","post","type-post","status-publish","format-standard","hentry","category-math","tag-concept"],"_links":{"self":[{"href":"https:\/\/www.clonefactor.com\/wordpress\/wp-json\/wp\/v2\/posts\/2288","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.clonefactor.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.clonefactor.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.clonefactor.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.clonefactor.com\/wordpress\/wp-json\/wp\/v2\/comments?post=2288"}],"version-history":[{"count":7,"href":"https:\/\/www.clonefactor.com\/wordpress\/wp-json\/wp\/v2\/posts\/2288\/revisions"}],"predecessor-version":[{"id":2303,"href":"https:\/\/www.clonefactor.com\/wordpress\/wp-json\/wp\/v2\/posts\/2288\/revisions\/2303"}],"wp:attachment":[{"href":"https:\/\/www.clonefactor.com\/wordpress\/wp-json\/wp\/v2\/media?parent=2288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.clonefactor.com\/wordpress\/wp-json\/wp\/v2\/categories?post=2288"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.clonefactor.com\/wordpress\/wp-json\/wp\/v2\/tags?post=2288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}