{"id":3587,"date":"2018-01-14T22:34:30","date_gmt":"2018-01-14T14:34:30","guid":{"rendered":"http:\/\/www.bookcard.net\/wordpress\/?p=3587"},"modified":"2018-10-14T21:30:17","modified_gmt":"2018-10-14T13:30:17","slug":"opengl_viewport","status":"publish","type":"post","link":"https:\/\/www.bookcard.net\/wordpress\/opengl_viewport\/","title":{"rendered":"OpenGL\u4e4b\u8996\u53e3\u8b8a\u63db"},"content":{"rendered":"<figure id=\"attachment_3588\" aria-describedby=\"caption-attachment-3588\" style=\"width: 1024px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/www.bookcard.net\/wordpress\/wp-content\/uploads\/2018\/01\/OpenGL_Viewport.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3588\" src=\"https:\/\/www.bookcard.net\/wordpress\/wp-content\/uploads\/2018\/01\/OpenGL_Viewport.jpg\" alt=\"\" width=\"1024\" height=\"768\" srcset=\"https:\/\/www.bookcard.net\/wordpress\/wp-content\/uploads\/2018\/01\/OpenGL_Viewport.jpg 1024w, https:\/\/www.bookcard.net\/wordpress\/wp-content\/uploads\/2018\/01\/OpenGL_Viewport-300x225.jpg 300w, https:\/\/www.bookcard.net\/wordpress\/wp-content\/uploads\/2018\/01\/OpenGL_Viewport-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption id=\"caption-attachment-3588\" class=\"wp-caption-text\">OpenGL\u4e4b\u8996\u53e3\u8b8a\u63db<\/figcaption><\/figure>\n<p>\u8996\u53e3(Viewport)\u5373\u6e32\u67d3\u7a97\u53e3\u5927\u5c0f,\u6bcf\u7576\u7a97\u53e3\u5927\u5c0f\u767c\u751f\u6539\u8b8a\u90fd\u8981\u4f7f\u7528glViewport()\u9032\u884c\u8a2d\u5b9a.\u8996\u53e3\u8b8a\u63db\u5728\u6295\u5f71\u8b8a\u63db\u4e4b\u5f8c\u9032\u884c<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"284\">\u8996\u53e3\u8a2d\u5b9a<\/td>\n<td width=\"284\">\u7c21\u4ecb<\/td>\n<\/tr>\n<tr>\n<td width=\"284\">void glViewport(<\/p>\n<p>GLint x, GLint y, \u8996\u53e3\u7684\u5de6\u4e0b\u89d2\u5750\u6a19<\/p>\n<p>GLsizei width, \u8996\u53e3\u7684\u5bec\u5ea6<\/p>\n<p>GLsizei height); \u8996\u53e3\u7684\u9ad8\u5ea6<\/td>\n<td width=\"284\">\u8996\u53e3\u7684\u5de6\u4e0b\u89d2\u5750\u6a19\u8a2d\u70ba0,0<\/p>\n<p>\u8996\u53e3\u7684\u5bec\u9ad8\u8a2d\u70ba\u7a97\u53e3\u5927\u5bec\u9ad8<\/p>\n<p>&nbsp;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u91cd\u8a2d\u7a97\u53e3\u5927\u5c0f,\u5728WM_SIZE(\u7a97\u53e3\u5927\u5c0f\u767c\u751f\u6539\u8b8a)\u6d88\u606f\u4e0b\u8abf\u7528<\/p>\n<ol>\n<li>glViewport(0,0,width,height);\u5c07\u8996\u53e3\u91cd\u7f6e\u70ba\u65b0\u7684\u5c3a\u5bf8<\/li>\n<li>glViewport(0,0,OpenGL_Width,OpenGL_Height);<\/li>\n<li>glMatrixMode(GL_PROJECTION); \u8a2d\u5b9a\u6295\u5f71\u77e9\u9663<\/li>\n<li>glLoadIdentity();\u8f09\u5165\u55ae\u4f4d\u77e9\u9663<\/li>\n<li>gluPerspective(0f, Width\/Height,1.0f,1000.0f);<\/li>\n<li>glMatrixMode(GL_MODELVIEW);\u8a2d\u5b9a\u6a21\u578b\u8996\u5716\u77e9\u9663<\/li>\n<li>glLoadIdentity();\u8f09\u5165\u55ae\u4f4d\u77e9\u9663<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8996\u53e3(Viewport)\u5373\u6e32\u67d3\u7a97\u53e3\u5927\u5c0f,\u6bcf\u7576\u7a97\u53e3\u5927\u5c0f\u767c\u751f\u6539\u8b8a\u90fd\u8981\u4f7f\u7528glViewport()\u9032\u884c\u8a2d\u5b9a.\u8996\u53e3\u8b8a\u63db &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.bookcard.net\/wordpress\/opengl_viewport\/\" class=\"more-link\">\u7e7c\u7e8c\u95b1\u8b80 <span class=\"screen-reader-text\">OpenGL\u4e4b\u8996\u53e3\u8b8a\u63db<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62],"tags":[50],"class_list":["post-3587","post","type-post","status-publish","format-standard","hentry","category-opengl","tag-opengl","entry"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/3587","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/comments?post=3587"}],"version-history":[{"count":2,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/3587\/revisions"}],"predecessor-version":[{"id":3590,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/3587\/revisions\/3590"}],"wp:attachment":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/media?parent=3587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/categories?post=3587"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/tags?post=3587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}