{"id":134,"date":"2006-07-30T05:52:34","date_gmt":"2006-07-29T20:52:34","guid":{"rendered":"http:\/\/www.gisdeveloper.co.kr\/?p=134"},"modified":"2017-01-31T19:50:43","modified_gmt":"2017-01-31T10:50:43","slug":"%eb%86%80%ea%b3%a0-%ec%9e%88%eb%8a%94-%eb%b9%84%eb%94%94%ec%98%a4-%eb%a9%94%eb%aa%a8%eb%a6%ac-%ed%99%9c%ec%9a%a9","status":"publish","type":"post","link":"http:\/\/www.gisdeveloper.co.kr\/?p=134","title":{"rendered":"\ub180\uace0 \uc788\ub294 \ube44\ub514\uc624 \uba54\ubaa8\ub9ac \ud65c\uc6a9"},"content":{"rendered":"

\ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\uc758 \uc6a9\ub7c9\uc740 \uc801\uac8c\ub294 32M\uc5d0\uc11c 256M \uc815\ub3c4 \ub41c\ub2e4. \ud754\ud788 128M \uc815\ub3c4\uc758 \uce74\ub4dc\uac00 \ub9ce\uc774 \uc0ac\uc6a9\ub41c\ub2e4. \uc774 \ub9ce\uc740 \ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\ub294 \ub80c\ub354\ub9c1\uc758 \uc18d\ub3c4\ub97c \ud5a5\uc0c1 \uc2dc\ud0a4\uae30 \uc704\ud574\uc11c 3\ucc28\uc6d0 \uadf8\ub798\ud53d \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uc0ac\uc6a9\ub41c\ub2e4. \ud558\uc9c0\ub9cc 3\ucc28\uc6d0 \uadf8\ub798\ud53d \ud504\ub85c\uadf8\ub7a8\uc774 \uad6c\ub3d9\ub418\uc9c0 \uc54a\uc744 \uacbd\uc6b0 \ub300\ubd80\ubd84\uc758 \ube44\ub514\uc624 \uce74\ub4dc \uba54\ubaa8\ub9ac\ub294 \uc0ac\uc6a9\ub418\uc9c0 \uc54a\uace0 \ub0ad\ube44\ub41c\ub2e4. \uc608\ub97c\ub4e4\uc5b4 \ud544\uc790\uc758 \uacbd\uc6b0 \ud574\uc0c1\ub3c4 1280×1024\uc5d0\uc11c 32\ube44\ud2b8 \uc0c9\uc0c1\uc744 \uc0ac\uc6a9\ud558\uace0 \ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\ub294 128M\uc774\ubbc0\ub85c 128M\uc5d0\uc11c \uc57d 5M\ub97c \ube80 \uc57d 120M \uc815\ub3c4\uc758 \ube44\ub514\uc624 \uba54\ubaa8\ub9ac\uac00 \ub180\uace0 \uc788\ub294 \uc148\uc774\ub2e4.<\/p>\n

\uadf8\ub807\ub2e4\uba74 \uc774\ub807\uac8c \ub0ad\ube44\ub418\ub294 \ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\ub97c 3D \uadf8\ub798\ud53d\uc758 \uc0ac\uc6a9 \ubaa9\uc801\uc774 \uc544\ub2cc \uc77c\ubc18 \uba54\ubaa8\ub9ac\ucc98\ub7fc \uc0ac\uc6a9\ud560 \uc218\ub294 \uc5c6\uc744\uae4c?<\/strong><\/font> \uac8c\ub2e4\uac00 \ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\ub294 \uc77c\ubc18 \uba54\ubaa8\ub9ac\uc5d0 \ube44\ud574\uc11c \uadf8 \uc18d\ub3c4\uac00 \ud6e8\uc52c\ub354 \ube60\ub974\ub2e4\ub294 \uc7a5\uc810\uc774 \uc788\uc9c0 \uc54a\uc740\uac00?<\/p>\n

\ube44\ub514\uc624 \uba54\ubaa8\ub9ac\ub97c \uc0ac\uc6a9\ud558\uae30 \uc704\ud574\uc11c\ub294 \ub2f9\uc5f0\ud788 \ube44\ub514\uc624 \uba54\ubaa8\ub9ac\uc5d0 \uc811\uadfc\ud560 \uc218 \uc788\uc5b4\uc57c \ud55c\ub2e4. \ube44\ub514\uc624 \uba54\ubaa8\ub9ac\uc5d0 \uc811\uadfc\ud558\uae30 \uc704\ud55c API\uac00 \ud544\uc694\ud55c\ub370, \uc811\uadfc\uc744 \uc704\ud55c \ud2b9\ubcc4\ud55c API \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\ub294\uac8c \uc544\ub2c8\ub77c OpenGL\uacfc DirectX\uc758 API\ub97c \uc0ac\uc6a9\ud558\uba74 \ub418\uaca0\ub2e4. \uc5ec\uae30\uc11c \ud544\uc790\uc5d0\uac8c \uc775\uc219\ud55c OpenGL API\ub97c \uc0ac\uc6a9\ud558\ub3c4\ub85d \ud558\uaca0\ub2e4.<\/p>\n

\ube44\ub514\uc624 \uba54\ubaa8\ub9ac\uc640 \uad00\ub828\ub41c OpenGL API\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n

– glBindBuffer
\n– glBufferData
\n– glBufferSubData
\n– glDeleteBuffers
\n– glGenBuffers
\n– glMapBuffer
\n– glUnmapBuffer<\/p>\n

\uc704\uc758 API\ub294 ARB \uad70\uc5d0 \uc18d\ud574 \uc788\ub2e4\uac00 OpenGL 1.5\ubd80\ud130\ub294 \ud45c\uc900\uc73c\ub85c \uc548\ucc29\ub418\uc5c8\ub2e4. \uc989, OpenGL 1.5 \uc774\uc804\uc5d0\ub294 \uc704\uc758 \ud568\uc218\uba85\uc5d0\ub2e4 \uc811\ubbf8\uc0ac\uaca9\uc73c\ub85c ARB\ub97c \ubd99\uc5ec \uc0ac\uc6a9\ud574\uc57c \ud55c\ub2e4. \uc608\ub97c \ub4e4\uc5b4\uc11c glBindBuffer\uc758 \uacbd\uc6b0 glBindBufferARB \ucc98\ub7fc \ub9d0\uc774\ub2e4. \ubb3c\ub860 ARB\uc758 \uacbd\uc6b0\ub294 Extension\uc774\ubbc0\ub85c \uc9c0\uc6d0\ud558\ub294\uc9c0\uc758 \uc5ec\ubd80\ub97c \uba3c\uc800 \ud655\uc778\ud574\uc57c \ud560 \uac83\uc774\ub2e4. \ud655\uc778\uc744 \uc704\ud55c \ubb38\uc790\uac12\uc740 GL_ARB_vertex_buffer_object\uc774\ub2e4.<\/p>\n

\uac01 \ud568\uc218\uc758 \ub0b4\uc6a9\uc5d0 \ub300\ud55c \uc124\uba85\uc740 \uc0dd\ub7b5\ud558\uace0 \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574\uc11c\ub9cc \uc0b4\ud3b4\ubcf4\uaca0\ub2e4. \uba3c\uc800 OpenGL\uc744 \ucd08\uae30\ud654\ud558\uace0 \ud604\uc7ac \uadf8\ub798\ud53d \uce74\ub4dc\uac00 \uc9c0\uc6d0\ud558\uace0 \uc788\ub294 OpenGL\uc758 \ubc84\uc804\uc774 1.5 \uc774\uc0c1\uc778\uc9c0\ub97c \ud655\uc778\ud574\uc57c \ud55c\ub2e4. \uc5ec\uae30\uc11c \ud55c\uac00\uc9c0 \ubb38\uc81c\uc810\uc774 \uc788\ub294\ub370, \uadf8\uac83\uc740 \ubc14\ub85c OpenGL\uc758 \ucd08\uae30\ud654\uc774\ub2e4. OpenGL\uc744 \ucd08\uae30\ud654\ud558\uc9c0 \uc54a\uc73c\uba74 \ud574\ub2f9 API\uc758 \uc9c4\uc785\uc810\uc744 \ucc3e\uc9c0 \ubabb\ud55c\ub2e4. \ud558\uc9c0\ub9cc 3D \uae30\ub2a5\uc744 \uc0ac\uc6a9\ud558\uc9c0\ub3c4 \uc54a\uc744 \uac83\uc778\ub370, OpenGL\uc744 \ucd08\uae30\ud654\ud558\ud574\uc57c\ud55c\ub2e4\ub294 \uac83\uc740 \uc5b4\uca4c\uba74 \ud070 \ubd80\ub2f4\uc774\ub2e4. \ud2b9\ud788 Console \ud504\ub85c\uadf8\ub798\ubc0d\uacfc \uac19\uc740 \uacbd\uc6b0 \ub80c\ub354\ub9c1 \ucc3d\uc5d0 \ub300\ud55c DC\ub97c \uc5bb\uc5b4\uc640\uc57c OpenGL\uc744 \ucd08\uae30\ud654\ud560 \uc218 \uc788\ub294\ub370, \uc774\ub7f0 \uacbd\uc6b0\uc5d0 \ud544\uc790\ub294 \ubc14\ud0d5\ud654\uba74\uc758 DC\ub97c \uc0ac\uc6a9\ud558\uc600\ub2e4. \ucd08\uae30\ud654\ub97c \uc704\ud574 \ubc14\ud0d5\ud654\uba74\uc758 DC\ub97c \uc0ac\uc6a9\ud558\uc600\uc744\ubfd0, \uc2e4\uc81c\ub85c \ubb34\uc5c7\uc778\uac00 \ub80c\ub354\ub9c1\ud558\uc9c0\ub294 \uc54a\uc558\uae30\ub54c\ubb38\uc5d0 \ubcc4 \ubb38\uc81c\ub294 \uc5c6\uc73c\ub9ac\ub77c \ubcf8\ub2e4.<\/p>\n

\uc5b4\ucc0c\ub418\uc5c8\ub4e0 OpenGL\uc744 \ucd08\uae30\ud654\ud558\uace0 OpenGL\uc758 \ubc84\uc804\uc774 1.5 \uc774\uc0c1\uc778 \uacbd\uc6b0 \uc704\uc758 API\uc758 \uc9c4\uc785\uc810 \ud3ec\uc778\ud2b8\ub97c \uc131\uacf5\uc801\uc73c\ub85c \uc5bb\uc5b4\uc654\ub2e4\uba74 \uc774\uc81c \uc0ac\uc6a9\ud558\ub294 \uc77c\ub9cc \ub0a8\uc558\ub2e4.<\/p>\n

\uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc740 \uc815\ub9d0 \uac04\ub2e8\ud558\ub2e4. \uc77c\ubc18 \uba54\ubaa8\ub9ac\uc758 \ud3ec\uc778\ud130\ub97c \uc5bb\uc5b4\uc640 \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uacfc \uc720\uc0ac\ud558\uae30 \ub54c\ubb38\uc774\ub2e4.<\/p>\n

GLuint bufferID;\r\n\r\nglGenBuffers(1, &bufferID);\r\nglBindBuffer(GL_ARRAY_BUFFER, bufferID);\r\nglBufferData(GL_ARRAY_BUFFER, sizeof(BYTE)*allocMemSize, NULL, GL_STATIC_DRAW);\r\nBYTE *pBuffer = (BYTE *)glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);<\/pre>\n
\uba3c\uc800 glGenBuffers\ub97c \uc0ac\uc6a9\ud558\uc5ec \ube44\ub514\uc624 \uce74\ub4dc \uba54\ubaa8\ub9ac \ubc84\ud37c\uc758 ID\ub97c \uc0dd\uc131\ud558\uace0 \uc774 \uba54\ubaa8\ub9ac \ubc84\ud37c\ub97c GL_ARRAY_BUFFER\uc640 \ubb36\uae30 \uc704\ud574 glBindBuffer \ud568\uc218\ub97c \uc0ac\uc6a9\ud55c\ub2e4. \uadf8 \ud6c4\uc5d0 glBufferData\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc2e4\uc81c \ube44\ub514\uc624 \uba54\ubaa8\ub9ac\ub97c \uc6d0\ud558\ub294 \ud06c\uae30\ub9cc\ud07c \ud560\ub2f9\ud558\ub294\ub370 \uc774 \uacbd\uc6b0 \uac00\uc7a5 \ube60\ub978 \uc18d\ub3c4\ub97c \uc704\ud574 GL_STATIC_DRAW\ub97c \uc0ac\uc6a9\ud558\uc600\ub2e4. \ud560\ub2f9\ud560 \uba54\ubaa8\ub9ac\uc758 \ud06c\uae30\ub294 \uc790\uc2e0\uc774 \uc0ac\uc6a9\ud558\ub294 \ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\uc758 \ud06c\uae30\ub97c \uc798 \uace0\ub824\ud574\uc11c \uc9c0\uc815\ud558\uae30 \ubc14\ub780\ub2e4. \uc5ec\uae30\uae4c\uc9c0 \uc131\uacf5\ud558\uc600\ub2e4\uba74 \ud560\ub2f9 \ubc1b\uc740 \ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\ub97c \uc77c\ubc18 \uba54\ubaa8\ub9ac\uc758 \ud3ec\uc778\ud130\ucc98\ub7fc \uc0ac\uc6a9\ud558\uae30 \uc704\ud574 \uba54\ubaa8\ub9ac \uc8fc\uc18c\uac12\uc73c\ub85c Mapping \uc2dc\ud0a4\uae30 \uc704\ud574 glMapBuffer\ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud3ec\uc778\ud130 \uc8fc\uc18c\ub97c \uc5bb\uc5b4 \uc628\ub2e4. \ubc14\ub85c \uc774 \ud3ec\uc778\ud130 \uc8fc\uc18c\ub97c \uc0ac\uc6a9\ud574\uc11c \uc77c\ubc18 \uba54\ubaa8\ub9ac\uc640 \ub611\uac19\uc774 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \uac83\uc774\ub2e4.<\/p>\n
for(size_t i=0; i\n
\uc704\uc758 \ucf54\ub4dc\ub294 \uc2e4\uc81c\ub85c \ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\ub97c \ub9c8\uce58 \uc77c\ubc18 \ud3ec\uc778\ud130\uc758 \uac1c\ub150\ucc98\ub7fc \uc0ac\uc6a9\ud558\ub294 \uc608\ub97c \ub4e0 \uac83\uc774\ub2e4.<\/p>\n
\uc774\uc81c\ub294 \uc774\ub807\uac8c \uc0ac\uc6a9\ud55c \ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\ub97c \ud574\uc81c\uc2dc\ud0a4\ub294 \ubc29\ubc95\uc740 \ub2e4\uc74c \ucf54\ub4dc\uc640 \uac19\ub2e4.<\/p>\n
<\/div>\n
glUnmapBuffer(GL_ARRAY_BUFFER);\r\nglDeleteBuffers(1, &bufferID);<\/pre>\n
\ud544\uc790\uac00 \uc2dc\ud5d8\uc0bc\uc544 10M\uc758 \uba54\ubaa8\ub9ac\ub97c \ube44\ub514\uc624 \uce74\ub4dc\uc5d0 \ud560\ub2f9\ud574 \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uacfc \uc77c\ubc18 \uba54\ubaa8\ub9ac\uc5d0 new \uc5f0\uc0b0\uc790\ub97c \uc774\uc6a9\ud574 \ud799\uc5d0 \ud560\ub2f9\ud574\uc11c \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc758 \uc18d\ub3c4 \ucc28\uc774\ub97c \ube44\uad50\ud574\ubcf8 \uacb0\uacfc \uc57d 3\ubc30\uc815\ub3c4\uc758 \uc18d\ub3c4 \ud5a5\uc0c1<\/strong><\/font>\uc774 \uc788\uc74c\uc744 \ubc1c\uacac\ud588\ub2e4. <\/p>\n
\ub05d\uc73c\ub85c \uc774\ub7f0 \ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\uc758 \uc18d\ub3c4\uc758 \uc7a5\uc810\uc744 \uc798\ud65c\uc6a9\ud55c\ub2e4\uba74 \ube60\ub978 \uc18d\ub3c4\ub97c \uc694\uad6c\ud558\ub294 \ucf54\ub4dc\uc5d0 \ub354\uc6b1 \uc88b\uc740 \uc131\ub2a5 \ud5a5\uc0c1\uc744 \uaf80\ud560 \uc218 \uc788\uc744 \uac83\uc774\ub2e4. \ub610\ud55c \ube44\ub514\uc624 \uba54\ubaa8\ub9ac\uc758 \uacbd\uc6b0 \uc77c\ubc18 \uba54\ubaa8\ub9ac\uc5d0 \ube44\ud574 \uc678\ubd80\uc758 \uc5b4\ud50c\ub9ac\ucf00\uc774\uc158\uc73c\ub85c\ubd80\ud130\uc758 \uba54\ubaa8\ub9ac \ud574\ud0b9\uc774 \uc5b4\ub835\uae30 \ub54c\ubb38\uc5d0 \ubcf4\uc548\uc801\uc778 \uba74\uc5d0\uc11c\ub3c4 \uc88b\uc740 \uc774\uc810\uc774 \uc788\uc744 \uac83\uc73c\ub85c \uc0dd\uac01\ub41c\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"
\ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\uc758 \uc6a9\ub7c9\uc740 \uc801\uac8c\ub294 32M\uc5d0\uc11c 256M \uc815\ub3c4 \ub41c\ub2e4. \ud754\ud788 128M \uc815\ub3c4\uc758 \uce74\ub4dc\uac00 \ub9ce\uc774 \uc0ac\uc6a9\ub41c\ub2e4. \uc774 \ub9ce\uc740 \ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\ub294 \ub80c\ub354\ub9c1\uc758 \uc18d\ub3c4\ub97c \ud5a5\uc0c1 \uc2dc\ud0a4\uae30 \uc704\ud574\uc11c 3\ucc28\uc6d0 \uadf8\ub798\ud53d \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uc0ac\uc6a9\ub41c\ub2e4. \ud558\uc9c0\ub9cc 3\ucc28\uc6d0 \uadf8\ub798\ud53d \ud504\ub85c\uadf8\ub7a8\uc774 \uad6c\ub3d9\ub418\uc9c0 \uc54a\uc744 \uacbd\uc6b0 \ub300\ubd80\ubd84\uc758 \ube44\ub514\uc624 \uce74\ub4dc \uba54\ubaa8\ub9ac\ub294 \uc0ac\uc6a9\ub418\uc9c0 \uc54a\uace0 \ub0ad\ube44\ub41c\ub2e4. \uc608\ub97c\ub4e4\uc5b4 \ud544\uc790\uc758 \uacbd\uc6b0 \ud574\uc0c1\ub3c4 1280×1024\uc5d0\uc11c 32\ube44\ud2b8 \uc0c9\uc0c1\uc744 \uc0ac\uc6a9\ud558\uace0 \ube44\ub514\uc624 \uce74\ub4dc\uc758 \uba54\ubaa8\ub9ac\ub294 128M\uc774\ubbc0\ub85c … <\/p>\n
\ub354 \ubcf4\uae30 “\ub180\uace0 \uc788\ub294 \ube44\ub514\uc624 \uba54\ubaa8\ub9ac \ud65c\uc6a9”<\/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":[117,8],"tags":[],"class_list":["post-134","post","type-post","status-publish","format-standard","hentry","category-cpp","category-programming"],"_links":{"self":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/134","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=134"}],"version-history":[{"count":2,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/134\/revisions"}],"predecessor-version":[{"id":3742,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/134\/revisions\/3742"}],"wp:attachment":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=134"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=134"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}