{"id":697,"date":"2008-03-22T11:16:46","date_gmt":"2008-03-22T11:16:46","guid":{"rendered":"http:\/\/www.gisdeveloper.co.kr\/?p=697"},"modified":"2017-01-29T10:33:44","modified_gmt":"2017-01-29T01:33:44","slug":"%ec%84%a0%ea%b3%bc-%ed%8f%ac%ec%9d%b8%ed%8a%b8-%ec%82%ac%ec%9d%b4%ec%9d%98-%ec%b5%9c%ec%86%8c-%ea%b1%b0%eb%a6%ac-%ea%b5%ac%ed%95%98%ea%b8%b0","status":"publish","type":"post","link":"http:\/\/www.gisdeveloper.co.kr\/?p=697","title":{"rendered":"\uc120\uacfc \uc810 \uc0ac\uc774\uc758 \ucd5c\uc18c \uac70\ub9ac \uad6c\ud558\uae30"},"content":{"rendered":"

\uc6d0\ubb38\uc740 http:\/\/local.wasp.uwa.edu.au\/~pbourke\/geometry\/pointline\/<\/a> \uc785\ub2c8\ub2e4.<\/p>\n

\uc9c0\uae08 \uc9c4\ud589\ud558\uace0 \uc788\ub294 \ud504\ub85c\uc81d\ud2b8\uc5d0\uc11c \ud544\uc694\ud55c \uc54c\uace0\ub9ac\uc998\uc778\ub370, \uc5b4\ub514 \uc774\ubbf8 \uad6c\ud604\ub41c \uc18c\uc2a4 \ucf54\ub4dc \uc5c6\ub098… \ucc3e\ub2e4\uac00 \ubc1c\uacac\ud55c\uac83\uc785\ub2c8\ub2e4. \ucc3e\uace0\ubcf4\ub2c8, \ubb34\ucc99 \uc624\ub798\uc804\uc5d0 \ubd24\ub358 \uae00\uc774\ub124\uc694. \uadf8\ub7f0\ub370 \uadf8\ub54c\ub294 \uc18c\uc2a4 \ucf54\ub4dc\ub97c \uc81c\uacf5\ud558\uc9c0 \uc54a\uc558\ub294\ub370… \uc5ec\ud558\ud2bc, \ub2e4\uc2dc \ubcf5\uc2b5\ud558\ub294 \uacb8\ud574\uc11c \ubc88\uc5ed\ud574 \uc62c\ub9bd\ub2c8\ub2e4. \uc608\uc804\uacfc \ub2e4\ub974\uac8c \uadf8\ub9bc\ub3c4 \uae54\ub054\ud574\uc11c \uadf8 \uadf8\ub9bc\uc744 \uadf8\ub300\ub85c \uc62c\ub9ac\uaca0\uc2b5\ub2c8\ub2e4. \ubb3c\ub860 \ubcc0\uc5ed\uc774\uae30\ub294 \ud558\uc9c0\ub9cc, \ub098\ub984\ub300\ub85c \ub0b4\uc6a9\uc744 \ubcf4\ucda9\ud574\uc11c \uc62c\ub838\uc2b5\ub2c8\ub2e4. \ub0b4\uc6a9 \uc2dc\uc791\ud569\ub2c8\ub2e4~<\/p>\n

P1(x1, y1)\uacfc P2(x2, y2)\ub97c \uc9c0\ub098\ub294 \uc120\ubd84\uc758 \uacf5\uc2dd\uc740 \uc544\ub798\uc640 \uac19\ub2e4.<\/p>\n

P<\/strong> = P1<\/strong> + u(P2<\/strong> – P1<\/strong>)<\/div>\n

\"\"<\/p>\n

\uc810 P3(x3, y3)\ub294 P1\uacfc P2\ub97c \uc9c0\ub098\ub294 \uc120\ubd84\uc5d0 \uc778\uc811\ud55c \uc810\uc774\ub2e4. P3\ub97c \uc120\ubd84\uae4c\uc9c0 \uc218\uc9c1\uc73c\ub85c \uc5f0\uc7a5\ud55c \uae38\uc774\uac00 \ubc14\ub85c \uc6b0\ub9ac\uac00 \uad6c\ud558\uace0\uc790 \ud558\ub294 \uac12, \uc989 \ucd5c\uc18c \uac70\ub9ac\uc774\ub2e4. \uc218\uc9c1\uc73c\ub85c \uc5f0\uc7a5\ud574\uc11c \ub9cc\ub098\ub294 \uc810\uc744 P\ub77c\uace0 \ud558\uc790. \uc989, P\ub294 \uc120\ubd84 \uc0c1\uc758 \uc810\uc774 \ub418\uaca0\ub2e4. \uadf8\ub807\ub2e4\uba74, \ubca1\ud130P3->P\uc640 \ubca1\ud130 P2->P1\ub97c \uc815\uc758\ud560 \uc218 \uc788\uc744 \uac83\uc774\uace0, \uc774 \ub450 \ubca1\ud130\uc758 \ub0b4\uc801(Dot Product)\ub294 0\uc774\ub2e4.<\/p>\n

(P3<\/strong> – P<\/strong>) dot (P2<\/strong> – P1<\/strong>) = 0<\/div>\n
<\/div>\n

\uc704\uc758 \uc2dd\uc758 P\uc5d0 \ucc98\uc74c\uc5d0 \uc5b8\uae09\ud55c \uc120\ubd84\uc758 \uc2dd(P\uc5d0 \ub300\ud55c)\uc744 \ub300\uc785\ud574\ubcf4\uba74…<\/p>\n

[P3<\/strong> – P1<\/strong> – u(P2<\/strong> – P1<\/strong>)] dot (P2<\/strong> – P1<\/strong>) = 0<\/div>\n
<\/div>\n

\uc704\uc758 \uc2dd\uc744 u\uc5d0 \ub300\ud574\uc11c \ud480\uc5b4\ubcf4\uba74,<\/p>\n

\"\"<\/p>\n

\uc774 u \uac12\uc744 \ub2e4\uc2dc \ucc98\uc74c\uc758 \uc120\ubd84\uc758 \ubc29\uc815\uc2dd(P1\uacfc P2\ub97c \uc9c0\ub098\ub294)\uc5d0 \ub300\uc785\ud574 \uad50\uc810P\uc5d0 \ub300\ud55c x, y\uc5d0 \ub300\ud574 \ud480\uc5b4\ubcf4\uba74…<\/p>\n

x<\/strong> = x1<\/strong> + u(x2<\/strong> – x1<\/strong>)
\ny<\/strong> = y2<\/strong> + u(y2<\/strong> – y1<\/strong>)<\/div>\n
<\/div>\n

\uadf8\ub807\ub2e4\uba74… \uc774\ub807\uac8c \uad6c\ud55c P\uc640 P3\uc758 \uac70\ub9ac\uac00 \ubc14\ub85c \uc6b0\ub9ac\uac00 \uad6c\ud558\uace0\uc790 \ud588\ub358 \ucd5c\uc18c \uac70\ub9ac\uac12\uc774 \ub41c\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"

\uc6d0\ubb38\uc740 http:\/\/local.wasp.uwa.edu.au\/~pbourke\/geometry\/pointline\/ \uc785\ub2c8\ub2e4. \uc9c0\uae08 \uc9c4\ud589\ud558\uace0 \uc788\ub294 \ud504\ub85c\uc81d\ud2b8\uc5d0\uc11c \ud544\uc694\ud55c \uc54c\uace0\ub9ac\uc998\uc778\ub370, \uc5b4\ub514 \uc774\ubbf8 \uad6c\ud604\ub41c \uc18c\uc2a4 \ucf54\ub4dc \uc5c6\ub098… \ucc3e\ub2e4\uac00 \ubc1c\uacac\ud55c\uac83\uc785\ub2c8\ub2e4. \ucc3e\uace0\ubcf4\ub2c8, \ubb34\ucc99 \uc624\ub798\uc804\uc5d0 \ubd24\ub358 \uae00\uc774\ub124\uc694. \uadf8\ub7f0\ub370 \uadf8\ub54c\ub294 \uc18c\uc2a4 \ucf54\ub4dc\ub97c \uc81c\uacf5\ud558\uc9c0 \uc54a\uc558\ub294\ub370… \uc5ec\ud558\ud2bc, \ub2e4\uc2dc \ubcf5\uc2b5\ud558\ub294 \uacb8\ud574\uc11c \ubc88\uc5ed\ud574 \uc62c\ub9bd\ub2c8\ub2e4. \uc608\uc804\uacfc \ub2e4\ub974\uac8c \uadf8\ub9bc\ub3c4 \uae54\ub054\ud574\uc11c \uadf8 \uadf8\ub9bc\uc744 \uadf8\ub300\ub85c \uc62c\ub9ac\uaca0\uc2b5\ub2c8\ub2e4. \ubb3c\ub860 \ubcc0\uc5ed\uc774\uae30\ub294 \ud558\uc9c0\ub9cc, \ub098\ub984\ub300\ub85c \ub0b4\uc6a9\uc744 \ubcf4\ucda9\ud574\uc11c \uc62c\ub838\uc2b5\ub2c8\ub2e4. \ub0b4\uc6a9 \uc2dc\uc791\ud569\ub2c8\ub2e4~ P1(x1, y1)\uacfc P2(x2, y2)\ub97c … <\/p>\n

\ub354 \ubcf4\uae30 “\uc120\uacfc \uc810 \uc0ac\uc774\uc758 \ucd5c\uc18c \uac70\ub9ac \uad6c\ud558\uae30”<\/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-697","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\/697","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=697"}],"version-history":[{"count":2,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/697\/revisions"}],"predecessor-version":[{"id":3506,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/697\/revisions\/3506"}],"wp:attachment":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=697"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}