{"id":839,"date":"2009-02-01T03:13:34","date_gmt":"2009-02-01T03:13:34","guid":{"rendered":"http:\/\/www.gisdeveloper.co.kr\/?p=839"},"modified":"2017-01-29T10:17:52","modified_gmt":"2017-01-29T01:17:52","slug":"%ed%8f%89%eb%a9%b4%ec%9d%98-%ea%b3%b5%ec%8b%9d","status":"publish","type":"post","link":"http:\/\/www.gisdeveloper.co.kr\/?p=839","title":{"rendered":"\ud3c9\uba74\uc758 \uacf5\uc2dd"},"content":{"rendered":"<p><strong><span style=\"color: #006699;\">\uc774 \uae00\uc758 \uc6d0\ubb38\uc740 <\/span><\/strong><a href=\"http:\/\/www.lighthouse3d.com\/opengl\/maths\/index.php?planes\"><strong><span style=\"color: #006699;\">http:\/\/www.lighthouse3d.com\/opengl\/maths\/index.php?planes<\/span><\/strong><\/a><\/p>\n<p><span style=\"color: #8e8e8e;\">\uc6d0\ubb38\uc758 \ub0b4\uc6a9\uc744 \uadf8\ub300\ub85c \ubc88\uc5ed\ud55c \uac83\uc774 \uc544\ub2cc, \uc81c\uac00 \uc774\ud574\ud558\uace0 \uc774\ud574\ud55c \ub0b4\uc6a9\uc5d0 \ub300\ud574 \ub0b4\uc6a9\uc744 \ucd94\uac00\ud558\uc600\uc73c\uba70 \uc880 \ub354 \uc27d\uac8c \ud480\uc5b4\uc11c \ub2e4\uc2dc \uc791\uc131\ud55c \uae00\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p>3\ucc28\uc6d0 \uc0c1\uc5d0\uc11c \ud3c9\uba74\uc740 \ub9ce\uc740 \ubc29\ubc95\uc73c\ub85c \ud45c\ud604\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uc774 \ubaa8\ub4e0 \ubc29\ubc95\ub4e4\uc740 \ubaa8\ub450 \ud3c9\uba74 \uc0c1\uc5d0 \uc874\uc7ac\ud558\ub294 \uc138\uac1c\uc758 \uc810\uc744 \uc54c\uace0 \uc788\ub2e4\ub294 \uac00\uc815 \uc544\ub798\uc11c \ud45c\ud604\uc774 \ub429\ub2c8\ub2e4. \uc5ec\ud558\ud2bc&#8230;.. \uac00\uc7a5 \uc77c\ubc18\uc801\uc778 \ud3c9\uba74\uc744 \uae30\uc220\ud558\ub294 \uc218\ud559\uc801\uc778 \uacf5\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.gisdeveloper.co.kr\/wp-content\/uploads\/1\/1289399759.jpg\" alt=\"\uc0ac\uc6a9\uc790 \uc0bd\uc785 \uc774\ubbf8\uc9c0\" width=\"202\" height=\"33\" \/><br \/>\n\ud3c9\uba74 \uc0c1\uc5d0 \uc874\uc7ac\ud558\ub294 \uc810\uc744 p0, p1, p2\ub77c\uace0 \ud558\uba74, \uacc4\uc218 A, B, C\uc640 D\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \uc808\ucc28\ub85c \uacc4\uc0b0\ub429\ub2c8\ub2e4.<\/p>\n<ol>\n<li>\ubca1\ud130 v\uc640 u\ub97c \uad6c\ud558\uba70, \ubca1\ud130 v = p1 &#8211; p0, u = p2 &#8211; p0\uc774\ub2e4.<\/li>\n<li>\ubca1\ud130 n = v x u (v\uc640 u\uc758 \uc678\uc801)<\/li>\n<li>\ubca1\ud130 n\uc744 \uc815\uaddc\ud654(\ud06c\uae30\uac00 1\uc778 \ub2e8\uc704\ubca1\ud130\ud654)<\/li>\n<li>\ubca1\ud130 n=(xn, yn, zn)\uc774\ub77c\uace0 \ud55c\ub2e4\uba74 \uacc4\uc218 A=xn, B=yn, C=zn \uc784<\/li>\n<li>\uacc4\uc218 D\ub97c \uad6c\ud558\uae30 \uc704\ud574 \uc55e\uc5d0\uc11c \uc81c\uc2dc\ud55c \ud3c9\uba74\uc758 \uacf5\uc2dd\uc744 D\uc5d0 \ub300\ud574 \uc804\uac1c. \uc989, -D = Ax + By + Cz<\/li>\n<li>\ud3c9\uba74 \uc0c1\uc758 \uc810(\uc608\ub97c \ub4e4\uc5b4 p0)\uc5d0 \ub300\ud574 \uc704\uc758 \uacf5\uc2dd\uc758 x, y, z\uc5d0 \uac12\uc744 \ub300\uc785\ud558\uc5ec D\ub97c \uad6c\ud568(\uc774 \uac12\uc740 \ub0b4\uc801\uc744 \uc774\uc6a9\ud574 \uc27d\uac8c \uad6c\ud560 \uc218 \uc788\uc74c. \uc989, D = -n \u2219 p0)<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.gisdeveloper.co.kr\/wp-content\/uploads\/1\/1108013614.jpg\" alt=\"\uc0ac\uc6a9\uc790 \uc0bd\uc785 \uc774\ubbf8\uc9c0\" width=\"331\" height=\"295\" \/><\/p>\n<p><strong><span style=\"font-size: medium;\">\uc5b4\ub5a4 \uc810\uc5d0\uc11c \ud3c9\uba74\uae4c\uc9c0\uc758 \uac70\ub9ac\uc640 \uadf8 \uc758\ubbf8<br \/>\n<\/span><\/strong><br \/>\n\uc774 \ube14\ub85c\uadf8\uc758 \ud3ec\uc2a4\ud305\ub41c \uae00\uc5d0 \uc911\uc5d0 \uc774\uc640 \uad00\ub828\ub41c \uae00\uc774 \uc788\uc9c0\ub9cc, \ud3c9\uba74\uc5d0 \ub300\ud55c \uacf5\uc2dd\uc744 \uc54c\uc544\ubcf4\ub2c8.. \ubcf5\uc2b5 \ucc28\uc6d0\uc5d0\uc11c \ub2e4\uc2dc \ud55c\ubc88 \uc815\ub9ac\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc55e\uc5d0\uc11c \ud3c9\uba74 \ubc29\uc815\uc2dd\uc758 \uacc4\uc218\ub97c \uad6c\ud558\ub294 \ubc29\ubc95\uc744 \uc774\uc6a9\ud574 \uc5bb\uc740 \ud3c9\uba74\uc758 \uacf5\uc2dd Ax + By + Cz + D = 0 \uc774 \uc788\ub2e4\uace0 \ud560\ub54c, \uc774 \ud3c9\uba74\uacfc \uc5b4\ub5a4 \uc810 r \uc0ac\uc774\uc758 \uac70\ub9ac\ub294&#8230; \ub9cc\uc57d r\uc774 (xr, yr, zr)\uc774\ub77c\uba74 \uc774 \uc88c\ud45c\ub97c \uc704\uc758 \ud3c9\uba74\uc758 \ubc29\uc815\uc2dd\uc5d0 \ub300\uc785\ud558\uc5ec D\uc5d0 \ub300\ud574 \uc804\uac1c\ud558\uc5ec \uad6c\ud55c \uac12\uc5d0 \ub300\ud574 \uc808\ub300\uac12\uc744 \ucde8\ud558\uba74 \ub429\ub2c8\ub2e4. \uc989, D = |Axr + Byr + Czr|\uc774\uba70 \uc774\ub294 \ub0b4\uc801\uc758 \uacf5\uc2dd\uc744 \uc774\uc6a9\ud574\uc11c \ub2e4\uc74c\ucc98\ub7fc \ud45c\ud604\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.gisdeveloper.co.kr\/wp-content\/uploads\/1\/1079700768.jpg\" alt=\"\uc0ac\uc6a9\uc790 \uc0bd\uc785 \uc774\ubbf8\uc9c0\" width=\"136\" height=\"30\" \/><br \/>\n\uac70\ub9ac\uac12\uc774\ubbc0\ub85c D\uc5d0 \ub300\ud574\uc11c \uc808\ub300\uac12\uc744 \ucde8\ud588\ub294\ub370, \uadf8\ub807\ub2e4\uba74 \uc774 \ubd80\ud638\uc758 \uc758\ubbf8\ub294 \ubb34\uc5c7\uc77c\uae4c\uc694? \uba3c\uc800 D \uac12\uc774 0\uc774\ub77c\uba74 r\uc740 \ud3c9\uba74 \uc0c1\uc5d0 \uc874\uc7ac\ud558\ub294 \uc810\uc785\ub2c8\ub2e4. r\uc774 \uc591\uc218\ub77c\uba74 \ud3c9\uba74\uc744 \uae30\uc900\uc73c\ub85c \ubca1\ud130 n\uc758 \ubc29\ud5a5\uc5d0 \uc788\ub294 \uacf5\uac04\uc0c1\uc5d0 r\uc774 \uc874\uc7ac\ud558\uace0 \uc74c\uc218\ub77c\uba74 \uadf8 \ubc18\ub300 \ubc29\ud5a5\uc5d0 \uc874\uc7ac\ud569\ub2c8\ub2e4.<\/p>\n<p><strong><span style=\"font-size: medium;\">\ud3c9\uba74\uc0c1\uc5d0 \uc5b4\ub5a4 \uc810\uc744 \ud22c\uc601<br \/>\n<\/span><\/strong><br \/>\n\uc810 q\ub97c \ud3c9\uba74 Ax + By + Cz + D = 0\uc5d0 \ud22c\uc601\ud55c \uc810\uc740 q\uc5d0\uc11c \uac00\uc7a5 \uac00\uae4c\uc6b4 \ud3c9\uba74\uc0c1\uc758 \uc810\uc785\ub2c8\ub2e4. q\uc5d0\uc11c \ud3c9\uba74\uae4c\uc9c0\uc758 \ubd80\ud638\uc788\ub294 \uac70\ub9ac(\uacc4\uc218 D)\ub97c dist\ub77c\uace0 \ud55c\ub2e4\uba74&#8230; \ud3c9\uba74\uc0c1\uc5d0 \uac00\uc7a5 \uac00\uae4c\uc6b4 \uc810 p\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.gisdeveloper.co.kr\/wp-content\/uploads\/1\/1122606829.jpg\" alt=\"\uc0ac\uc6a9\uc790 \uc0bd\uc785 \uc774\ubbf8\uc9c0\" width=\"156\" height=\"33\" \/><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.gisdeveloper.co.kr\/wp-content\/uploads\/1\/1145015774.jpg\" alt=\"\uc0ac\uc6a9\uc790 \uc0bd\uc785 \uc774\ubbf8\uc9c0\" width=\"388\" height=\"260\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uc774 \uae00\uc758 \uc6d0\ubb38\uc740 http:\/\/www.lighthouse3d.com\/opengl\/maths\/index.php?planes \uc6d0\ubb38\uc758 \ub0b4\uc6a9\uc744 \uadf8\ub300\ub85c \ubc88\uc5ed\ud55c \uac83\uc774 \uc544\ub2cc, \uc81c\uac00 \uc774\ud574\ud558\uace0 \uc774\ud574\ud55c \ub0b4\uc6a9\uc5d0 \ub300\ud574 \ub0b4\uc6a9\uc744 \ucd94\uac00\ud558\uc600\uc73c\uba70 \uc880 \ub354 \uc27d\uac8c \ud480\uc5b4\uc11c \ub2e4\uc2dc \uc791\uc131\ud55c \uae00\uc785\ub2c8\ub2e4. 3\ucc28\uc6d0 \uc0c1\uc5d0\uc11c \ud3c9\uba74\uc740 \ub9ce\uc740 \ubc29\ubc95\uc73c\ub85c \ud45c\ud604\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uc774 \ubaa8\ub4e0 \ubc29\ubc95\ub4e4\uc740 \ubaa8\ub450 \ud3c9\uba74 \uc0c1\uc5d0 \uc874\uc7ac\ud558\ub294 \uc138\uac1c\uc758 \uc810\uc744 \uc54c\uace0 \uc788\ub2e4\ub294 \uac00\uc815 \uc544\ub798\uc11c \ud45c\ud604\uc774 \ub429\ub2c8\ub2e4. \uc5ec\ud558\ud2bc&#8230;.. \uac00\uc7a5 \uc77c\ubc18\uc801\uc778 \ud3c9\uba74\uc744 \uae30\uc220\ud558\ub294 \uc218\ud559\uc801\uc778 \uacf5\uc2dd\uc740 &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/www.gisdeveloper.co.kr\/?p=839\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;\ud3c9\uba74\uc758 \uacf5\uc2dd&#8221;<\/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":[9],"tags":[39],"class_list":["post-839","post","type-post","status-publish","format-standard","hentry","category-algorithms","tag-algorithm"],"_links":{"self":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=839"}],"version-history":[{"count":1,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/839\/revisions"}],"predecessor-version":[{"id":3462,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/839\/revisions\/3462"}],"wp:attachment":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=839"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}