{"id":62,"date":"2005-05-14T07:17:00","date_gmt":"2005-05-14T07:17:00","guid":{"rendered":"http:\/\/www.gisdeveloper.co.kr\/?p=62"},"modified":"2017-01-29T20:11:11","modified_gmt":"2017-01-29T11:11:11","slug":"opengl-tutorial-composition-objects","status":"publish","type":"post","link":"http:\/\/www.gisdeveloper.co.kr\/?p=62","title":{"rendered":"[OpenGL Tutorial] Composition Objects"},"content":{"rendered":"

\"\uc0ac\uc6a9\uc790\uc774 \uc7a5\uc5d0\uc11c\ub294 OpenGL\uc5d0\uc11c \uacf5\uac04\uc0c1\uc5d0 \ubb3c\uccb4\ub97c \uc6d0\ud558\ub294 \uc704\uce58\uc5d0 \uc704\uce58\uc2dc\ud0a4\uace0 \uc6d0\ud558\ub294 \ubc29\ud5a5\uc73c\ub85c \uc6c0\uc9c1\uc774\uac70\ub098 \ud68c\uc804\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf8\ub2e4. \ucd5c\uc885\uc801 \uc2e4\uc2b5\uc73c\ub85c \ub450\uac1c\uc758 \uad6c\ub97c \uc774\uc6a9\ud574\uc11c \uccab\ubc88\uc9f8 \uad6c\ub294 \ud654\uba74 \uc911\uc559\uc5d0\uc11c \uc81c\uc790\ub9ac\uc5d0\uc11c \ud68c\uc804\uc744 \ud558\uba70 \ub450\ubc88\uc9f8 \uad6c\ub294 \uccab\ubc88\uc9f8 \uad6c\ub97c \uc911\uc2ec\uc73c\ub85c \uc77c\uc815\ud55c \uac70\ub9ac\ub97c \uc720\uc9c0\ud558\uba74\uc11c \ub3d9\uc2dc\uc5d0 \uc790\uc2e0\uc758 \uc911\uc2ec\uc810\uc744 \uae30\uc900\uc73c\ub85c\ud574\uc11c \ud68c\uc804\ud558\ub294 \uac83\uc744 \uad6c\ud604\ud574 \ubcf8\ub2e4. \uc880\ub354 \ub2e4\ub974\uac8c \ud45c\ud604\ud55c\ub2e4\uba74 \uccab\ubc88\uc9f8 \uad6c\ub294 \uc790\uc804\ub9cc\uc744 \ud558\uba70 \ub450\ubc88\uc9f8 \uad6c \uc5ed\uc2dc \uc790\uc804\uc744 \ud558\uba74\uc11c \ub3d9\uc2dc\uc5d0 \uccab\ubc88\uc9f8 \uad6c \uc8fc\uc704\ub97c \uacf5\uc804\ud558\ub294 \uc608\ub97c \ub9d0\ud55c\ub2e4. OpenGL\uc5d0\uc11c \uc774\ub7ec\ud55c \uc77c\ub828\uc740 \ub3d9\uc791\uc740 \uac04\ub2e8\ud55c \uc218\ud559\uc801\uc778 \uc5f0\uc0b0\uc744 \ud1b5\ud574\uc11c \uc774\ub8e8\uc5b4\uc9c4\ub2e4\uace0 \uac15\uc870\ud558\uace0 \uc2f6\ub2e4. \ubb3c\ub860 \ubaa8\ub4e0 \ucef4\ud4e8\ud130\uc758 \ub3d9\uc791\uc758 \ubaa8\ub450\uac00 \uc218\ud559\uc801\uc774\uae30\ub294 \ud558\uc9c0\ub9cc \ud544\uc790\uac00 \uc774 \uc218\ud559\uc801\uc774\ub77c\ub294 \uac83\uc5d0 \ub300\ud574 \uac15\uc870\ud558\ub294 \uc774\uc720\uc640 \uac04\ub2e8\ud55c \uc218\ud559 \uc5f0\uc0b0\uc774\ub77c\uace0 \ub9d0\ud558\ub294 \uc774\uc720\ub294 \ub2e4\ub984 \uc544\ub2cc 4X4 \ud589\ub82c, \uc774 \ud558\ub098\ub9cc\uc73c\ub85c \ubaa8\ub4e0 \uac83\uc774 \uc774\ub8e8\uc5b4 \uc9c4\ub2e4\ub294 \uac83\uc774\ub2e4. Matrix(\ub9e4\ud2b8\ub9ad\uc2a4)\ub77c\ub294 \uc601\ud654\ub97c \ubcf4\uc558\ub294\uac00? \ub9e4\ud2b8\ub9ad\uc2a4\ub780 \uc6b0\ub9ac\ub098\ub77c \ub9d0\ub85c \ud589\ub82c\uc774\ub780 \ub73b\uc774 \uc788\ub2e4. \uc989, \uacf5\uac04\uc0c1\uc758 \ubaa8\ub4e0 \uc6d0\uc790, \uc694\uc18c\ub4e4\uc740 \uc774 \ud589\ub82c\uc744 \ud1b5\ud574\uc11c \ud1b5\uc81c\ub418\uc5b4\uc9c8 \uc218 \uc788\ub2e4. \uace0\uc791 16\uac1c\uc758 \uc22b\uc790\ub4e4\uc5d0 \uc758\ud574\uc11c \ub9d0\uc774\ub2e4. Matrix\ub780 \uc601\ud654\uc5d0\uc11c \uc778\uac04\ub4e4\uc740 \ucef4\ud4e8\ud130\uc758 \ud1b5\uc81c\ud558\uc5d0 \uc6c0\uc9c1\uc774\uac8c \ub418\ub294\ub370 \uadf8 \ucef4\ud4e8\ud130\uc640 \uc778\uac04\uc758 \ud1b5\uc81c\ub77c\ub294 \ub0b4\uc6a9\uacfc Matrix\ub780 \uc601\ud654\uc758 \uc81c\ubaa9\uc774 \uadf8 \uc5b4\ub5a4 \uac15\ud55c \uc5f0\uad00\uc774 \uc788\ub2e4 \ub290\uaef4\uc9c0\uc9c0 \uc54a\ub294\uac00? <\/P>

\uc790, \uc774\uc81c \uc0ac\uc124\uc740 \uc5ec\uae30\uc11c \ub9c8\ubb34\ub9ac \ud558\uae30\ub85c \ud558\uace0 \uc7a0\uc2dc \uac04\ub2e8\ud55c \uc218\ud559 \uc774\uc57c\uae30\ub97c \ud574\uc57c\uaca0\ub2e4. \ubcf5\uc7a1\ud55c \ub0b4\uc6a9\uc740 \ube7c\uace0 \uaf2d \ud544\uc694\ud55c \uc26c\uc6b4 \uc218\ud559 \uc774\uc57c\uae30\ub9cc\uc744 \ud560\uac83\uc774\ub2c8 \uac71\uc815\ud560 \ud544\uc694\ub294 \uc5c6\ub2e4. \uc6b0\ub9ac\ub294 \uc774\ubbf8 \uace0\ub4f1\ud559\uad50 \uc2dc\uc808\uc5d0 \ud589\ub82c\uc774\ub77c\ub294 \uc218\ud559\uc801 \ub3c4\uad6c\ub97c \ubc30\uc6e0\ub2e4. 4X4\ud589\ub82c, \ud06c\uc9c0\ub3c4 \uadf8\ub807\ub2e4\uace0 \uc791\uc9c0\ub3c4 \uc54a\uc740 16\uac1c\uc758 \uac12\uc744 \uac00\uc9c4 \ubca1\ud130 \uacf5\uac04\uc77c \ubfd0\uc774\ub2e4. 4X4\ud589\ub82c\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \ub098\ud0c0\ub0bc\uc218\uc788\ub2e4\ub294 \uac83\uc744 \uc6b0\ub9ac\ub294 \uc774\ubbf8 \ubaa8\ub450 \uc54c\uace0 \uc788\uc744 \uac83\uc774\ub2e4. (\ucc38\uace0\ub85c \uc774\uc7a5\uc744 \uc18c\ud654\ud574 \ub0b4\uae30 \uc704\ud55c \ub3c5\uc790\uc758 \uc218\uc900\uc740 \ucd5c\uc18c\ud55c \ud589\ub82c\uc758 \uacf1\uc744 \ud560\uc218\uc788\uc5b4\uc57c \ud55c\ub2e4)\"\uc0ac\uc6a9\uc790\uc989, \ucd1d 16\uac1c\uc758 \uac12\uc744 \uac00\uc9c4 \ubca1\ud130 \uacf5\uac04\uc774\ub2e4. \uc5ec\uae30\uc11c \ubca1\ud130 \uacf5\uac04\uc774\ub77c\uace0 \ud558\ub294 \uac83\uc5d0 \ub300\ud574\uc11c \ub108\ubb34 \uc2e0\uacbd \uc4f0\uc9c0 \ub9d0\uae38 \ubc14\ub780\ub2e4. \uadf8\uc800 \ub9ce\uc740 \ubca1\ud130 \uacf5\uac04\uc911\uc5d0 \ud589\ub82c\ub3c4 \ud3ec\ud568\ub41c\ub2e4\ub294 \uc815\ub3c4\ub9cc \uc54c\uc790. \uc790 \uc774\uc81c \uc2e4\uc81c \ud589\ub82c\uacfc \uacf5\uac04\uc0c1\uc758 \uc88c\ud45c\uc758 \uc5f0\uc0b0\uc5d0 \ub300\ud574\uc11c \uc0b4\ud3b4\ubcf4\uc790.
\"\uc0ac\uc6a9\uc790\uc704 \uc5f0\uc0b0\uc740 \uacf5\uac04\uc0c1\uc758 \uc784\uc774\uc758 \uc810\uc758 \uc88c\ud45c (x,y,z)\uac00 \ud06c\uae30\uac00 4X4\uc778 \ub2e8\uc704 \ud589\ub82c\uc744 \ud1b5\ud574 \uc544\ubb34\ub7f0 \uc704\uce58\uc758 \ubcc0\ud654\uc5c6\uc774 \uc6d0\ub798\uc758 (x,y,z)\uc758 \uc704\uce58\uac12\uc774 \ub098\uc624\ub294 \uc608\uc774\ub2e4. \uc8fc\uc758\ud574\uc11c \ubcf4\uba74 \uc704\uc758 \ud589\ub82c \uc5f0\uc0b0\uc5d0\uc11c \uc88c\uce21\uc758 4X4 \ud589\ub82c\uc774 \ub2e8\uc704 \ud589\ub82c\uc784\uc744 \uc54c\uc218\uc788\ub2e4. \uc5b4\ub5a0\ud55c \ud589\ub82c\uc774\uac74 \ub2e8\uc704\ud589\ub82c\uacfc \uacf1\ud558\uba74 \ubcf8\ub798\uc758 \ud589\ub82c\uc774 \ub098\uc628\ub2e4\ub294 \uac83\uc744 \uc54c\uace0\uc788\ub294\uac00? \uadf8\ub807\ub2e4\uba74 \uc774\uc81c \uc704\uc758 \ud589\ub82c \uc5f0\uc0b0\uc5d0\uc11c \uc8fc\uc5b4\uc9c4 \uc88c\uce21\uc758 4X4 \ud589\ub82c\uc774 \ub2e8\uc704\ud589\ub82c\uc774 \uc544\ub2cc \ub2e4\ub978 \ud589\ub82c\uc77c\ub54c \uc8fc\uc5b4\uc9c4 \uc88c\ud45c\ub294 \uc5b4\ub5a4 \uc0c8\ub85c\uc6b4 \uc88c\ud45c\uac12\uc73c\ub85c \ubc14\ub014\uac83\uc774\ub77c\ub294 \uac83\uc744 \uc54c\uc218\uc788\ub2e4. \ub2e4\ud589\uc774 \uc6b0\ub9ac\ub294 \ub9ce\uc740 \uc120\ud589\ub300\uc218\ud559 \uad50\uc81c\uc5d0\uc11c\ub098 \ucef4\ud4e8\ud130 3\ucc28\uc6d0 \uadf8\ub798\ud53d \uc11c\uc801\uc5d0\uc11c\ub098 \uc88b\uc740 OpenGL \uc11c\uc801\uc5d0\uc11c \uc720\uc6a9\ud55c 4X4\ud589\ub82c\uc744 \ubcfc\uc218\uc788\ub2e4. \uccab\uc9f8\ub294 \uc88c\ud45c\ub97c \uc6d0\ud558\ub294 \uc704\uce58\ub85c \uc774\ub3d9\ud560\uc218\uc788\ub294 \uc774\ub3d9\ud589\ub82c, \ub458\uc9f8\ub294 \uc88c\ud45c\ub97c \uc6d0\uc810(0,0,0)\uc744 \uae30\uc900\uc73c\ub85c \ud68c\uc804\uc2dc\ud0a4\ub294 \ud68c\uc804\ud589\ub82c, \uadf8\ub9ac\uace0 \uc774\ubc16\uc5d0\ub3c4 \ud06c\uae30 \ubcc0\ud658 \ud589\ub82c(Scale Matrix), \ubc00\ub9bc \ud589\ub82c, \ubb3c\uccb4\uc758 \uadf8\ub9bc\uc790\ub97c \uc5bb\uc5b4\ub0bc\uc218 \uc788\ub294 \uadf8\ub9bc\uc790 \ubcc0\ud658 \ud589\ub82c \ub4f1\ub4f1, \ub3c5\uc790\uc758 \uc218\ud559\uc801 \uc9c0\uc2dd\uc774 \ub6f0\uc5b4\ub098\uba74 \ub6f0\uc5b4\ub0a0 \uc218\ub85d \uc5c4\uccad\ub098\uace0 \ubb34\uad81 \ubb34\uc9c4\ud55c \uc751\uc6a9\uc744 \ud560 \uc218 \uc788\uaca0\ub2e4. \uadf8\ub807\ub2e4\uba74 OpenGL\uc5d0\uc11c \uac00\uc7a5 \ub9ce\uc774 \uc0ac\uc6a9\ud558\uace0 \uc788\ub294 \uc774\ub3d9\ud589\ub82c, \ud68c\uc804\ud589\ub82c, \ud06c\uae30\ubcc0\ud658\ud589\ub82c \uc774\ub807\uac8c \uc138\uac00\uc9c0\uc5d0 \ub300\ud574\uc11c \uacb0\uacfc\ub9cc\uc744 \uc54c\uc544\ubcf4\ub3c4\ub85d \ud558\uc790. <\/P>

\uba3c\uc800 \uc774\ub3d9 \ud589\ub82c\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.
\"\uc0ac\uc6a9\uc790\ud589\ub82c\uc758 \uc6d0\uc18c\uc911 X, Y, Z\uac12\uc740 \uac01\uac01 X\ucd95, Y\ucd95, Z\ucd95\uc73c\ub85c \uadf8 \uac12\ub9cc\ud07c \uc774\ub3d9\ud558\uace0\uc790 \ud558\ub294 \uac12\uc774\ub2e4. \uc608\ub97c \ub4e4\uc5b4\uc11c \uacf5\uac04\uc0c1\uc758 \uc704\uce58(3, 2, 4)\ub97c X\ucd95\uc73c\ub85c -1\ub9cc\ud07c, Y\ucd95\uc73c\ub85c 2\ub9cc\ud07c, Z\ucd95\uc73c\ub85c 1\ub9cc\ud07c \uc774\ub3d9\ud588\uc744 \uacbd\uc6b0\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf4\uba74 \ub2e4\uc74c\uacfc \uac19\uc744 \uac83\uc774\ub2e4.\"\uc0ac\uc6a9\uc790\uacb0\uacfc\ub85c\uc368 (2,4,2)\uac00 \ub098\uc654\ub294\ub370 \uc2e4\uc81c\ub85c (3,2,1)\uc744 \uc704\uc5d0\uc11c \uc5b8\uae09\ud55c \uc774\ub3d9\uc744 \ud558\uac8c \ub418\uba74 (2,4,2)\uac00 \ub41c\ub2e4. \ub2e4\uc74c\uc5d0 \uc5b8\uae09\ub418\ub294 \ubaa8\ub4e0 \ud589\ub82c\uc758 \uc0ac\uc6a9\ubc95\uc740 \uc774\uc640 \ub3d9\uc77c\ud558\ub2e4.<\/P>

\ud68c\uc804 \ud589\ub82c\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf4\uc790. \uc5b4\ub5a4 \ubb3c\uccb4\ub97c \ud68c\uc804\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc5b4\ub5a4 \ucd95\uc744 \uae30\uc900\uc73c\ub85c\ud574\uc11c \uba87\ub3c4\ub9cc\ud07c \ud68c\uc804\ud560 \uac83\uc778\uc9c0\ub97c \uc9c0\uc815\ud574\uc57c \ud55c\ub2e4. \ucd95\uc740 X\ucd95, Y\ucd95, Z\ucd95\uc774 \uc788\uc73c\ubbc0\ub85c \uc6b0\ub9ac\ub294 \uc774 \uc138\uac1c\uc758 \ucd95\uc5d0 \ub300\ud574 \uac01\uac01\uc758 \ud68c\uc804 \ud589\ub82c\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf4\uaca0\ub2e4. <\/P>

X\ucd95\uc744 \uae30\uc900\uc73c\ub85c \uac01 a\ub9cc\ud07c \ud68c\uc804\uc2dc\ud0a4\ub294 \ud68c\uc804 \ud589\ub82c\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.\"\uc0ac\uc6a9\uc790\ub2e4\uc74c\uc740 Y\ucd95\uc744 \uae30\uc900\uc73c\ub85c \uac01 a\ub9cc\ud07c \ud68c\uc804\uc2dc\ud0a4\ub294 \ud68c\uc804 \ud589\ub82c\uc774\ub2e4.
\"\uc0ac\uc6a9\uc790\ub2e4\uc74c\uc740 Z\ucd95\uc744 \uae30\uc900\uc73c\ub85c \uac01 a\ub9cc\ud07c \ud68c\uc804\uc2dc\ud0a4\ub294 \ud68c\uc804\ud589\ub82c\uc774\ub2e4.
\"\uc0ac\uc6a9\uc790\ub2e4\uc74c\uc73c\ub85c \uc54c\uc544 \ubcfc\uac83\uc740 \uc740 \ud06c\uae30 \ubcc0\ud658 \ud589\ub82c\uc774\ub2e4. \uc810\uc740 \ud06c\uae30\ub97c \uac16\uc9c0 \uc54a\uc9c0\ub9cc \uc810\ub4e4\uc774 \ubaa8\uc5ec\uc11c \ubb3c\uccb4\ub97c \uc774\ub904 \ud06c\uae30\ub97c \uac16\uac8c \ub420\ub54c \uc720\uc6a9\ud55c \ubcc0\ud658 \ud589\ub82c\uc774\ub2e4. \uc6d0\uc810\uc744 \uae30\uc900\uc73c\ub85c\ud574\uc11c \ubcc0\ud658\ub41c\ub2e4. \uc544\ub798\uc758 \ud589\ub82c\uc774 \ubc14\ub85c \ud06c\uae30 \ubcc0\ud658 \ud589\ub82c\uc774\ub2e4.
\"\uc0ac\uc6a9\uc790X\uac12\uc740 X\ucd95\uc744 \uae30\uc900\uc73c\ub85c\ud574\uc11c X\ubc30\uc758 \ud06c\uae30\ub85c \ubcc0\ud658\ub418\uace0 Y\uac12\uc740 Y\ucd95\uc744 \uae30\uc900\uc73c\ub85c \ud574\uc11c Y\ubc30\uc758 \ud06c\uae30\ub85c \ubcc0\ud658\ub418\uba70 Z\uac12\uc740 Z\ucd95\uc744 \uae30\uc900\uc73c\ub85c\ud574\uc11c Z\ubc30\uc758 \ud06c\ub9ac\uace0 \ubcc0\ud658\ub418\uac8c \ub41c\ub2e4.<\/P>

\uc790! \uc774\ub807\uac8c \ud574\uc11c \uac01\uac01\uc758 \ubcc0\ud658 \ud589\ub82c\ub4e4\uc5d0 \ub300\ud574\uc11c \uc0b4\ud3b4\ubcf4\uc558\ub2e4. \uadf8\ub807\ub2e4\uba74 \uc5b4\ub5a4 \ud55c\uc810\uc744 \uc5b4\ub290 \uc9c0\uc810\uc73c\ub85c \uc774\ub3d9\uc2dc\ud0a8\ud6c4\uc5d0 \ub2e4\uc2dc \uc5b4\ub5a4 \ucd95\uc744 \uc911\uc2ec\uc73c\ub85c \ud68c\uc804\ud558\uace0 \uadf8\ub9ac\uace0 \ud06c\uae30\ub97c \ubcc0\uacbd\ud558\uace0\uc790 \ud560\ub54c\uac00 \uc788\ub2e4\uace0\ud558\uba74 \uba3c\uc800 \uc774\ub3d9\ud589\ub82c\ub85c \uacc4\uc0b0\uc744 \ud574\uc11c \uadf8 \uacb0\uacfc\uac12\uc744 \ub2e4\uc2dc \ud68c\uc804\ud589\ub82c\ub85c \uacc4\uc0b0\ud558\uace0 \ub610 \uc0c8\ub86d\uac8c \ub098\uc628 \uacb0\uacfc\uac12\uc744 \ub2e4\uc2dc \ud06c\uae30\ubcc0\ud658 \ud589\ub82c\ub85c \uacc4\uc0b0\uc744 \ud558\uba74\ub418\ub294\ub370 \uc774\uac83\uc744 \uac01\uac01\uc758 \ubcc0\ud658\ud589\ub82c\uc744 \ubaa8\ub450 \uacf1\ud55c\ud6c4\uc5d0 \ubcc0\ud658\ud558\uace0\uc790 \ud558\ub294 \uc704\uce58\uc640 \uac01\uac01\uc758 \ubcc0\ud658 \ud589\ub82c\uc744 \uacf1\ud55c \ud589\ub82c\uc5d0 \uacf1\ud574\uc918\ub3c4 \uac19\uc740 \uacb0\uacfc\ub97c \uc5bb\ub294\ub2e4. \ubb34\uc2a8\ub9d0\uc778\uace0\ud558\uba74 \ub2e4\uc74c\uc758 \uc608\ub97c \ub4e4\uc5b4\ubcf4\ub3c4\ub85d \ud558\uaca0\ub2e4. (3,2,1)\uc758 \uc810\uc744 X\ucd95\uc73c\ub85c -1\ub9cc\ud07c \uc774\ub3d9\ud6c4 Z\ucd95\uc73c\ub85c 90\ub3c4 \ud68c\uc804\uc2dc\ucf1c\ubcf4\uc790. \uba3c\uc800 (1,2,3)\uc744 X\ucd95\uc73c\ub85c 3\ub9cc\ud07c \uc774\ub3d9\ub418\uc5b4 \ubcc0\ud658\ub418\ub294 \uc88c\ud45c\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/P>\"\uc0ac\uc6a9\uc790\uc774\ub3d9\ub418\uc5b4 (2,2,1)\uc774\ub77c\ub294 \uc810\uc73c\ub85c \ubcc0\ud658\ub418\uc5c8\ub2e4. \ub2e4\uc2dc \uc774\uc810\uc744 Z\ucd95\uc73c\ub85c 90\ub3c4 \ud68c\uc804\uc2dc\ucf1c \ubcc0\ud658\ub418\ub294 \uc88c\ud45c\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc5bb\uc5b4\uc9c8\uc218\uc788\ub2e4.
\"\uc0ac\uc6a9\uc790\uc989, \ucd5c\uc885\uc801\uc73c\ub85c (-2, 2, 1)\uc758 \uc88c\ud45c\uac00 \uc5bb\uc5b4\uc84c\ub2e4. \uc6d0\ub798\uc758 \uc88c\ud45c\ub97c \uba3c\uc800 \uc774\ub3d9\ud589\ub82c \uc5f0\uc0b0\ud6c4\uc5d0 \ub2e4\uc2dc \ud68c\uc804\ud589\ub82c \uc5f0\uc0b0\uc744 \uc2dc\ucf1c \uc6d0\ud558\ub294 \uc88c\ud45c\ub97c \uc5bb\uc740 \uac83\uc774\ub2e4. \uc774\uac83\uc744 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ud560 \uc218 \uc788\ub3c4 \uc788\uc74c\uc744 \uc8fc\uc758\ud574\uc11c \ubcf4\uae30\ubc14\ub780\ub2e4.
\"\uc0ac\uc6a9\uc790\uc989, \uc774\ub3d9\ud589\ub82c\uacfc \ud68c\uc804\ud589\ub82c\uc744 \uba3c\uc800 \uacc4\uc0b0\ud574\uc11c \uc5bb\uc5b4\uc9c4 \ud589\ub82c\uc5d0 \ubcc0\ud658\ud558\uace0\uc790\ud558\ub294 \uc88c\ud45c\ub97c \uc5f0\uc0b0\ud558\uc5ec \ucd5c\uc885\uc801\uc778 \ubcc0\ud658 \uc88c\ud45c\ub97c \uc5bb\ub294 \uac83\uc774\ub2e4. OpenGL\uc740 \uc774 \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud55c\ub2e4. \uc774 \uc608\uc5d0\uc11c \uc6b0\ub9ac\ub294 \uc774\ub3d9\ud589\ub82c \uc5f0\uc0b0\ud6c4\uc5d0 \ud68c\uc804 \ud589\ub82c \uc5f0\uc0b0\uc744 \uc218\ud589\ud588\uc74c\uc744 \ub208\uc5ec\uaca8 \ubd10\uc57c \ud55c\ub2e4. \uadf8\ub807\ub2e4\uba74 \uc21c\uc11c\ub97c \ubc14\uafc0\uacbd\uc6b0 \uc5b4\ub5bb\uac8c \ub420\uac83\uc778\uac00? \uc989 \ud68c\uc804 \ud589\ub82c \uc5f0\uc0b0\ud6c4 \uc774\ub3d9 \ud589\ub82c \uc5f0\uc0b0\uc744 \uc218\ud589\ud560 \uacbd\uc6b0\ub97c \ub9d0\uc774\ub2e4. \uc9c1\uc811 \ud574\ubcf4\uba74 \uc54c\uaca0\uc9c0\ub9cc \ub2e4\ub978 \uacb0\uacfc \uac12\uc774 \ub098\uc628\ub2e4\ub294 \uac83\uc744 \uc54c\uc218\uc788\ub2e4.

\uc790, \uc5ec\uae30\uae4c\uc9c0 \ubaa8\ub450 \uc774\ud574\uac00 \ub418\uc5c8\ub294\uac00? \uc774\ud574\uac00 \ub418\uc5c8\ub2e4\uba74 \uc65c \ud544\uc790\uac00 OpenGL\uc5d0\uc11c \ubb3c\uccb4\ub97c \uad6c\uc131\ud558\uae30 \uc704\ud574\uc11c \uc774\ub7f0 \uc218\ud559 \uc774\uc57c\uae30\ub97c \uc37c\ub294\uc9c0\ub97c \uc55e\uc73c\ub85c\uc758 \ub0b4\uc6a9\uc744 \ud1b5\ud574\uc11c \uc54c\uac8c\ub420\uac83\uc774\ub2e4. \uc774\uc81c OpenGL\uc5d0\uc11c \uc55e\uc5d0\uc11c \uc0b4\ud3b4\ubcf8 \ud589\ub82c\uc5f0\uc0b0\uc640 \ubb3c\uccb4\uc758 \uad6c\uc131\uc5d0 \ub300\ud574\uc11c \uc0b4\ud3b4\ubcf4\ub3c4\ub85d\ud558\uc790. \uc9c0\uae08\uae4c\uc9c0 \ub0b4\uc6a9\uc774 \uc774\ud574\uac00 \ub418\uc9c0 \uc54a\ub294 \ub3c5\uc790\ub294 \ub4a4\uc5d0 \uc774\uc5b4\uc9c0\ub294 \ub0b4\uc6a9\uc744 \uacc4\uc18d\ud574 \uc77d\uc9c0 \ub9d0\uace0 \uc55e\uc758 \ub0b4\uc6a9\uc774 \uc774\ud574\uac00 \ub420\ub54c\uae4c\uc9c0 \ubc18\ubcf5\uc801\uc73c\ub85c \uc77d\uc5b4\ub098\uac00\uae38 \ub2f9\ubd80\ud55c\ub2e4.<\/P>

OpenGL\uc740 \uac00\uc7a5 \ucc98\uc74c\uc5d0 \ubb3c\uccb4\uc758 \uc88c\ud45c\ubcc0\ud658 \ud589\ub82c\ub85c\uc368 \ub2e8\uc704\ud589\ub82c\uc744 \uac16\ub294\ub2e4. \uc989, \uc810\ub4e4\uc5d0 \ub300\ud574\uc11c \uc544\ubb34\ub7f0 \ubcc0\ud658\uc774 \uc5c6\ub294 \uac83\uc774\ub2e4. OpenGL\uc774 \ubcc0\ud658 \ud589\ub82c\ub85c\uc368 \ub2e8\uc704\ud589\ub82c\uc744 \uac16\uace0 \uc788\uc744\ub54c\ub97c \uc804\uc5ed\uc88c\ud45c\uacc4\ub77c\ud558\ub3c4\ub85d \ud558\uc790. \ub098\uc911\uc5d0 \uc5ec\ub7ec\uac00\uc9c0 \ubcc0\ud658 \ud589\ub82c\uc744 \ud1b5\ud574\uc11c \uc774 \ub2e8\uc704 \ud589\ub82c\uc774 \ub2e4\ub978 \uac12\uc744 \uac16\ub294 \ud589\ub82c\ub85c \ubcc0\uacbd\ub418\ub294\ub370 \uc774\ub54c \ub2e4\uc2dc \ub2e8\uc704\ud589\ub82c\ub85c \ub418\ub3cc\ub9ac\uae30 \uc704\ud574\uc11c \uc6b0\ub9ac\ub294 glLoadIdentity\ub77c\ub294 \ud568\uc218\ub97c \ud638\ucd9c\ud568\uc73c\ub85c\uc368 \uac04\ub2e8\uc774 \ub2e8\uc704\ud589\ub82c\uc744 \ubcc0\ud658\ud589\ub82c\ub85c \ub300\uccb4\ud560\uc218\uc788\ub2e4. <\/P>

\uc6b0\ub9ac\ub294 \uc774\ubbf8 \uacf5\uac04\uc0c1\uc758 \uc5b4\ub5a4 \ud558\ub098\uc758 \uc810\ub97c \uc774\ub3d9\ud558\ub294 OpenGL API \ud568\uc218\ub97c \uc54c\uace0\uc788\ub2e4. \ubc14\ub85c glTranslatef\uc774\ub2e4. \ubaa8\ub450\uac00 \ub2e4 \uc798\uc54c\uace0 \uc788\ub4ef \uc774 \ud568\uc218\ub294 \uc138\uac1c\uc758 \uc778\uc790\ub97c \ucde8\ud558\ub294\ub370 \uac01\uac01 X\ucd95, Y\ucd95, Z\ucd95\uc73c\ub85c \uc774\ub3d9\ud560 \ub9cc\ud07c\uc758 \uac12\uc744 \uac16\ub294\ub2e4. \uc989 glTranslatef\ud568\uc218\ub97c \ud638\ucd9c\ud558\uac8c\ub418\uba74 \uc804\uc5d0 OpenGL\uc774 \uac00\uc9c0\uace0 \uc788\ub294 \ubcc0\ud658\ud589\ub82c\uc5d0 \uc774\ub3d9\ud589\ub82c\uc744 \uacf1\ud558\uac8c \ub418\ub294 \uac83\uc774\ub2e4. \uc774\ub807\uac8c \ud574\uc11c \ub098\uc911\uc5d0 \uacf5\uac04\uc0c1\uc758 \uc810\ub4e4\uc774 \uc774 \ubcc0\ud658\ud589\ub82c\uc744 \ud1b5\ud574\uc11c \uc6d0\ud558\ub294 \uc704\uce58\ub85c\uc758 \uc774\ub3d9 \ubcc0\ud658\uc774 \uc774\ub8e8\uc5b4\uc9c0\ub294 \uac83\uc774\ub2e4.<\/P>

\ub610 \uc6b0\ub9ac\ub294 \uc774\ubbf8 \uacf5\uac04\uc0c1\uc758 \uc5b4\ub5a4 \ud558\ub098\uc758 \uc810\uc744 \ud68c\uc804\ud558\ub294 OpenGL API\ud568\uc218\ub97c \uc54c\uace0 \uc788\ub2e4. \ubc14\ub85c glRotatef\uc774\ub2e4. \uc5ed\uc2dc \ubaa8\ub450\uac00 \uc798 \uc54c\uace0 \uc788\ub4ef\uc774 \uc774 \ud568\uc218\ub294 \ub124\uac1c\uc758 \uc778\uc790\ub97c \ucde8\ud558\ub294\ub370 \ud68c\uc804\ud560 \uac01, \uadf8\ub9ac\uace0 \ub098\uba38\uc9c0 \uc138\uac1c\ub294 \ud558\ub098\uc758 \uc88c\ud45c\ub85c \uc778\uc2dd\ub418\uc5b4\uc11c \uc6d0\uc810\uc73c\ub85c\ubd80\ud130 \uc138\uac1c\uc758 \uc778\uc790\ub85c \uacb0\uc815\ub418\ub294 \uc88c\ud45c\uae4c\uc9c0 \uc774\uc740 \ucd95\uc744 \uc911\uc2ec\uc73c\ub85c \ud68c\uc804\ud558\uac8c \ub418\ub294\uac83\uc774\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ud68c\uc804\uc5f0\uc0b0\uc740 X\ucd95, Y\ucd95, Z\ucd95\uc73c\ub85c \ub098\ub220\uc11c \ud68c\uc804\ud558\ub294 \uacbd\uc6b0\uac00 \ub9ce\ub2e4. \uc989 X\ucd95\uc73c\ub85c 45\ub3c4\ub9cc\ud07c \ud68c\uc804\ud558\uace0 Y\ucd95\uc73c\ub85c 30\ub9cc\ud07c \ud68c\uc804\ud558\uace0\uc790 \ud560\uacbd\uc6b0\ub77c\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 2\uac1c\uc758 \ud568\uc218\ub97c \uc5f0\uc774\uc5b4 \ud638\ucd9c\ud558\uba74 \ub41c\ub2e4.<\/P><\/p>\n

glRotatef(45.0f, 1.0f, 0.0f, 0.0f);\r\nglRotatef(30.0f, 0.0f, 1.0f, 0.0f);<\/pre>\n
\ub208\uce58\ub97c \ucc48 \ub3c5\uc790\uac00 \uc788\uaca0\uc9c0\ub9cc \uc5ed\uc2dc glRotatef \uc5ed\uc2dc \uae30\uc874\uc758 \uac00\uc9c0\uace0 \uc788\ub358 \ubcc0\ud658\ud589\ub82c\uc5d0 \ud68c\uc804 \ubcc0\ud658 \ud589\ub82c\uc744 \uacf1\ud558\uac8c \ub418\ub294\ub370 \uc774\ub807\uac8c \ud574\uc11c \ub098\uc911\uc5d0 \uacf5\uac04\uc0c1\uc758 \uc810\ub4e4\uc774 \uc774 \ubcc0\ud658\ud589\ub82c\uc744 \ud1b5\ud574\uc11c \uc6d0\ud558\ub294 \uc704\uce58\ub85c\uc758 \ubcc0\ud658\uc774 \uc774\ub8e8\uc5b4\uc9c0\ub294 \uac83\uc774\ub2e4.<\/P>
\ub610 \uc6b0\ub9ac\ub294 \uc774\ubbf8 \uacf5\uac04\uc0c1\uc5d0 \uc5b4\ub5a4 \ubb3c\uccb4\uc758 \ud06c\uae30\ub97c \ubcc0\ud658\ud558\ub294 \ud568\uc218\ub97c \uc54c\uace0 \uc788\ub2e4. glScalef\uc778\ub370 \ubaa8\ub450 3\uac1c\uc758 \uc778\uc790\ub97c \uac00\uc9c0\uace0 \uc788\ub2e4. \uccab\ubc88\uc9f8\ub294 X\ucd95\uc73c\ub85c \uba87\ubc30\ub9cc\ud07c \ud06c\uae30\ub97c \ud0a4\uc6b8\uac83\uc778\uc9c0, \ub450\ubc88\uc9f8\ub294 Y\ucd95\uc73c\ub85c \uba87\ubc30\ub9cc\ud07c \ud06c\uae30\ub97c \ud0a4\uc6b8\uac83\uc778\uc9c0, \uc138\ubc88\uc9f8\ub294 Z\ucd95\uc73c\ub85c \uba87\ubc30\ub9cc\ud07c \ud06c\uae30\ub97c \ud0a4\uc6b8\uac83\uc778\uc9c0\ub97c \uc9c0\uc815\ud558\uac8c \ub41c\ub2e4. \uc5ed\uc2dc \uc774 \ud568\uc218\ub3c4 \uae30\uc874\uc758 \ubcc0\ud658\ud589\ub82c\uc5d0 \ud06c\uae30\ubcc0\ud658 \ud589\ub82c\uc744 \uacf1\ud558\uac8c\ub41c\ub2e4.<\/P>
\uc774\ub807\uac8c glTranslatef, glRotatef, glScalef \ud568\uc218\ub4e4\uc5d0 \uc758\ud574\uc11c OpenGL\uc758 \uc88c\ud45c\ucd95\uc744 \uc0c8\ub86d\uac8c \uc815\uc758\ud560\uc218\uc788\ub294\ub370 \uc774\ub807\uac8c \uc815\uc758\ub41c \uc88c\ud45c\ucd95\uc744 \uc9c0\uc5ed\uc88c\ud45c\ucd95\uc774\ub77c\uace0 \ud55c\ub2e4.<\/P>
OpenGL\uc740 \ubcc0\ud658\ud589\ub82c\uc744 \uc704\ud574\uc11c \uc911\uc694\ud55c \uc5ec\ub7ec\uac00\uc9c0 \ud568\uc218\ub97c \uc81c\uacf5\ud558\ub294\ub370 \uadf8\uc911\uc5d0\uc11c glPushMatrix\uc640 glPopMatrix \ud568\uc218\ub97c \uc81c\uacf5\ud55c\ub2e4. glPushMatrix\ub294 \ud604\uc81c \uac00\uc9c0\uace0 \uc788\ub294 \ubcc0\ud658\ud589\ub82c\uc758 \uac12\ub4e4\uc744 \uc2a4\ud0dd(Stack)\uc5d0 \uc784\uc2dc\ub85c \uc800\uc7a5\ud574 \ub450\ub294 \ud568\uc218\uc774\uace0 glPopMatrix\ub294 \ub2e4\uc2dc \uc784\uc2dc\ub85c \uc800\uc7a5\ud588\ub358 \ud589\ub82c\uac12\ub4e4\uc744 \uaebc\ub0b4\ub294 \uae30\ub2a5\uc744 \ud55c\ub2e4. \uc2a4\ud0dd\uc740 \uc790\ub8cc\uad6c\uc870\uc0c1 \ub9ce\uc740 \ubcc0\ud658\ud589\ub82c \uac12\ub4e4\uc744 \uc800\uc7a5\ud560\uc218\uc788\uace0 \uac00\uc7a5 \ucd5c\uadfc\uc5d0 \uc800\uc7a5\ud588\ub358 \uac12\uc774 \uac00\uc7a5 \ucc98\uc74c\uc73c\ub85c \uaebc\ub0b4\uc9c0\uac8c \ub41c\ub2e4. \uc774 \ub450\uac1c\uc758 \ud568\uc218\ub294 \uc5ec\ub7ec\uac1c\uc758 \ubb3c\uccb4\ub97c \uacf5\uac04\uc0c1\uc5d0 \uad6c\uc131\ud558\ub294\ub370 \uc544\uc8fc \uc911\uc694\ud55c \ud568\uc218\uc774\ub2e4. \uc65c\ub0d0\ud558\uba74 \ubb3c\uccb4 \ud558\ub098\ub2f9 \uc6b0\ub9ac\ub294 \ubcc0\ud658\ud589\ub82c\uc744 \uc801\uc6a9\ud560 \uac83\uc774\ub2e4. \uc989, \ubb3c\uccb4 \ud558\ub098\ub2f9 \uc9c0\uc5ed \uc88c\ud45c\ucd95\uc744 \ud558\ub098\uc529 \ub450\ub294 \uac83\uc774\ub2e4. \uc774 \uac83\uc5d0 \ub300\ud55c \uac83\uc740 \uc2e4\uc81c \uc608\ub97c \ud1b5\ud574\uc11c \uc54c\uc544\ubcf4\ub3c4\ub85d \ud55c\ub2e4.<\/P>
\uc5ec\uae30\uc11c \uc6b0\ub9ac\ub294 \ubcc0\ud658 \ud589\ub82c\uacfc \uc88c\ud45c\ucd95\uc774 \uc0ac\ub85c \ub611 \uac19\uc740 \uc758\ubbf8\ub77c\ub294 \uac83\uc744 \uc54c\uc218\uc788\ub2e4. \uc989, \ubcc0\ud658\ud589\ub82c\uc744 \uc774\uc6a9\ud574\uc11c \uc88c\ud45c\ucd95 \uc804\uccb4\ub97c \uc774\ub3d9\uc2dc\ud0a4\uac70\ub098 \ud68c\uc804 \ub610\ub294 \ud06c\uae30\ub97c \ubcc0\ud658 \uc2dc\ud0a4\ub294 \uacbd\uc6b0\ub85c \ud574\uc11d\ud560 \uc218 \uc788\ub2e4\ub294 \uc758\ubbf8\uc774\ub2e4. \uc774\ub3d9 \ubcc0\ud658 \ud589\ub82c\uc744 \uc218\ud589\ud558\uba74 \uc88c\ud45c\ucd95\uc740 \uc774\ub3d9 \ubcc0\ud658 \ud589\ub82c\uc5d0 \uc758\ud574\uc11c \uc774\ub3d9\ud558\uac8c \ub418\uace0 \ud68c\uc804 \ubcc0\ud658 \ud589\ub82c\uc744 \uc218\ud589\ud558\uba74 \uc88c\ud45c\ucd95\uc740 \uadf8 \ud68c\uc804 \ubcc0\ud658 \ud589\ub82c\uc5d0 \uc758\ud574\uc11c \ud68c\uc804\ud558\uac8c \ub41c\ub2e4. \ub610\ud55c \ud06c\uae30 \ubcc0\ud658 \ud589\ub82c \uc5f0\uc0b0\uc744 \uc218\ud589\ud558\uba74 \uc88c\ud45c\ucd95\uc758 \uac01\uac01\uc758 \ucd95\ub4e4\uc740 \ub298\uc5b4\ub098\uac70\ub098 \uc904\uc5b4\ub4e4\uac8c \ub418\ub294 \uac83\uc774\ub2e4. \uc55e\uc5d0\uc11c\ub3c4 \uc5b8\uae09\ud588\uc9c0\ub9cc \ud589\ub82c \uc5f0\uc0b0\uc740 \uadf8 \uc21c\uc11c\uac00 \uc911\uc694\ud558\ub2e4. \uc774\ub3d9 \ud589\ub82c \uc5f0\uc0b0\ud6c4 \ud68c\uc804 \ud589\ub82c \uc5f0\uc0b0\uc758 \uacb0\uacfc\uc640 \ud68c\uc804 \ud589\ub82c \uc5f0\uc0b0\ud6c4 \uc774\ub3d9 \ud589\ub82c\uc758 \uc5f0\uc0b0\uc740 \ub2e4\ub978 \uac12\uc744 \uc5bb\ub294\ub2e4. \uc88c\ud45c\ucd95\uc73c\ub85c \uc0dd\uac01\ubd10\ub3c4 \uc27d\uac8c \uc54c\uc218\uc788\ub2e4. \uc544\ub798\uc758 \uadf8\ub9bc\uc774 \ubc14\ub85c \uadf8\uac83\uc778\ub370 \ub2e8\uc9c0 \ud68c\uc804\uacfc \uc774\ub3d9 \uc5f0\uc0b0\uc758 \uc21c\uc11c\ub9cc\uc744 \ubc14\uafbc \uacbd\uc6b0\uc774\ub2e4.\"\uc0ac\uc6a9\uc790\uc790, \uc774\uc81c \ucd5c\uc885\uc801\uc73c\ub85c \uc2e4\uc81c \uc608\uc81c\ub97c \ud1b5\ud574\uc11c \uc774\uc7a5\uc744 \ub9c8\ubb34\ub9ac \uc9c0\uc5b4 \ubcfc\uae4c \ud55c\ub2e4. 1\uc7a5\uc758 \uc18c\uc2a4 \ucf54\ub4dc\uc5d0\uc11c \uc644\uc804\uc774 \uc0c8\ub86d\uac8c \uc2dc\uc791\ud558\ub3c4\ub85d \ud558\uc790. <\/P>
\uc608\ub85c\uc368 \uc6b0\ub9ac\uac00 \uc774 \uc7a5\uc758 \uac00\uc7a5 \ucc98\uc74c\uc5d0 \uc5b8\uae09\ud588\ub358 \ub450\uac1c\uc758 \uad6c\ub97c \uc774\uc6a9\ud574\uc11c \uccab\ubc88\uc9f8 \uad6c\ub294 \ud654\uba74 \uc911\uc559\uc5d0\uc11c \uc81c\uc790\ub9ac\uc5d0\uc11c \ud68c\uc804\uc744 \ud558\uba70 \ub450\ubc88\uc9f8 \uad6c\ub294 \uccab\ubc88\uc9f8 \uad6c\ub97c \uc911\uc2ec\uc73c\ub85c \uc77c\uc815\ud55c \uac70\ub9ac\ub97c \uc720\uc9c0\ud558\uba74\uc11c \ub3d9\uc2dc\uc5d0 \uc790\uc2e0\uc758 \uc911\uc2ec\uc810\uc744 \uae30\uc900\uc73c\ub85c\ud574\uc11c \ud68c\uc804\ud558\ub294 \uac83\uc744 \uad6c\ud604\ud574 \ubcf8\ub2e4. \uccab\ubc88\uc9f8 \uad6c\ub97c \uc9c0\uad6c\ub77c\ud558\uace0 \ub450\ubc88\uc9f8 \uad6c\ub97c \ub2ec\uc774\ub77c \ud3b8\uc758\uc0c1 \uad6c\ubd84\ud558\uc790.<\/P>
\uba3c\uc800 \uc804\uc5ed\ubcc0\uc218 \uc9c0\uc5ed\uc5d0 \ub2e4\uc12f\uac1c\uc758 \ubcc0\uc218\ub97c \ucd94\uac00\ud55c\ub2e4.<\/P><\/p>\n
GLUquadricObj *obj; \/\/ \uad6c\ub97c \uadf8\ub9ac\uae30 \uc704\ud55c \uac1d\uccb4 \ud3ec\uc778\ud130\r\nGLfloat o1_rot = 0.0f; \/\/ \uc9c0\uad6c\uc758 \uc790\uc804\uac01 \r\nGLfloat o2_rot1 = 0.0f; \/\/ \ub2ec\uc758 \uacf5\uc804\uac01\r\nGLfloat o2_rot2 = 0.0f; \/\/ \ub2ec\uc758 \uc790\uc804\uac01\r\nGLfloat distance = 8.0f; \/\/ \ub2ec\uacfc \uc9c0\uad6c\uc758 \uac01 \uc911\uc2ec\uac04\uc758 \uac70\ub9ac<\/pre>\n
InitGL \ud568\uc218\uc5d0\uc11c \uba87\uac00\uc9c0 \ucd08\uae30\ud654 \uc2dc\ucf1c\uc918\uc57c\ud560 \ucd94\uac00 \ucf54\ub4dc\uac00 \uc788\ub294\ub370 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n
int InitGL(GLvoid) {\r\n    glShadeModel(GL_SMOOTH);\r\n    glClearColor(0.0f, 0.0f, 0.0f, 0.5f);\r\n    glClearDepth(1.0f);\r\n    glEnable(GL_DEPTH_TEST);\r\n    glDepthFunc(GL_LEQUAL);\r\n    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);\r\n   \r\n    obj = gluNewQuadric();\r\n    gluQuadricNormals(obj, GLU_SMOOTH);\r\n    gluQuadricOrientation(obj, GLU_OUTSIDE);\r\n    gluQuadricTexture(obj, GL_FALSE);\r\n   \r\n    glEnable(GL_LIGHTING);\r\n    glEnable(GL_LIGHT0);\r\n    glEnable(GL_COLOR_MATERIAL);\r\n   \r\n    return TRUE;\r\n}<\/pre>\n
\uc774\ubbf8 \uc774\uc804 \uc7a5\uc5d0\uc11c \ubaa8\ub450 \uc124\uba85\ub418\uc5c8\ub358 \ucf54\ub4dc\ub4e4\uc774\ubbc0\ub85c \uc790\uc138\ud55c \uc124\uba85\uc740 \ud53c\ud558\uae30\ub85c \ud558\uace0 \ub300\ub7b5\uc801\uc73c\ub85c \uc124\uba85\ud558\uc790\uba74 \ub2e4\uc74c\uacfc \uac19\ub2e4. \uba3c\uc800 Quadric \uac1d\uccb4 \ud3ec\uc778\ud130 \ubcc0\uc218\ub97c \uc774\uc6a9\ud574\uc11c \uc778\uc2a4\ud134\uc2a4 \ubcc0\uc218\ub97c \uc0dd\uc131\ud558\uc5ec Quadric\uc758 \uc18d\uc131\uc744 \uc124\uc815\ud558\uace0 \uad11\uc6d0\uacfc \uc0c9\uc0c1\uc744 \ucd94\uc801\ud574\uc11c \uc7ac\uc9c8\ub85c \ub9cc\ub4dc\ub294 \uae30\ub2a5\uc744 \ucf20\ub2e4.
\n
\uc790 \uc774\uc81c \uc2e4\uc81c\ub85c \uc911\uc694\ud55c DrawGLScene \ud568\uc218\ub97c \uc0b4\ud3b4\ubcf4\uae30\ub85c \ud558\uc790.<\/P><\/p>\n
int DrawGLScene(GLvoid)\r\n{\r\n    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);\r\n    glLoadIdentity();                                      \/\/<1>\r\n    glTranslatef(0.0f, 0.0f, -22.0f);                      \/\/<2>\r\n   \r\n    glPushMatrix();                                        \/\/<3>\r\n    glRotatef(o1_rot, 0.0f, 1.0f, 0.0f);                   \/\/<4>\r\n    gluQuadricDrawStyle(obj, GLU_FILL);                    \/\/<5>\r\n    glColor3f(0.9f, 0.9f, 0.9f);                           \/\/<5>\r\n    gluSphere(obj, 2.0f, 24, 24);                          \/\/<5>\r\n    gluQuadricDrawStyle(obj, GLU_LINE);                    \/\/<5>\r\n    glColor3f(0.6f, 0.6f, 1.0f);                           \/\/<5>\r\n    gluSphere(obj, 2.1f, 24, 24);                          \/\/<5>\r\n    glPopMatrix();                                         \/\/<6>\r\n   \r\n    glPushMatrix();                                        \/\/<7>\r\n    glRotatef(o2_rot1, 0.0f, 1.0f, 0.0f);                  \/\/<8>\r\n    glTranslatef(distance, 0.0f, 0.0f);                    \/\/<9>\r\n    glRotatef(o2_rot2, 0.0f, 1.0f, 0.0f);                  \/\/<10>\r\n    gluQuadricDrawStyle(obj, GLU_FILL);                    \/\/<11>\r\n    glColor3f(0.9f, 0.9f, 0.9f);                           \/\/<11>\r\n    gluSphere(obj, 0.7f, 12, 12);                          \/\/<11>\r\n    gluQuadricDrawStyle(obj, GLU_LINE);                    \/\/<11>\r\n    glColor3f(1.0f, 0.6f, 0.6f);                           \/\/<11>\r\n    gluSphere(obj, 0.75f, 12, 12);                         \/\/<11>\r\n    glPopMatrix();                                         \/\/<12>\r\n   \r\n    o1_rot+=0.5f; if(o1_rot>359.5f) o1_rot=0.0f;           \/\/<13>\r\n    o2_rot1+=0.05f; if(o2_rot1>359.95f) o2_rot1=0.0;       \/\/<13>\r\n    o2_rot2+=2.0f; if(o2_rot2>358.0f) o2_rot2=0.0;         \/\/<13>\r\n   \r\n    return TRUE;\r\n}<\/pre>\n
\uc790, \ud558\ub098 \ud558\ub098 \uc124\uba85\ud574 \ubcf4\ub3c4\ub85d \ud558\uc790.
\n
<1>\ubc88 \ucf54\ub4dc\ub294 \ubcc0\ud658 \ud589\ub82c\uc744 \ub2e8\uc704 \ud589\ub82c\ub85c \ucd08\uae30\ud654 \uc2dc\ucf1c\uc8fc\ub294 \uc608\uc774\ub2e4.<\/P>
<2>\ubc88 \ucf54\ub4dc\ub294 \uc774\ub3d9 \ubcc0\ud658 \ud589\ub82c\uc744 \uc774\uc6a9\ud574\uc11c \uc88c\ud45c\ucd95\uc744 Z\ucd95\uc73c\ub85c -20\ub9cc\ud07c \uc774\ub3d9\ud55c \uac83\uc774\ub2e4. \uc774\ub807\uac8c \uc774\ub3d9\ud55c \uc774\uc720\ub294 \uc6b0\ub9ac\uac00 OpenGL\uc5d0\uc11c \ubb3c\uccb4\ub97c \ubc14\ub85c\ubcf4\ub294 \ub208\uc758 \uc704\uce58\uac00 (0,0,0)\uc5d0 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4. \ub9cc\uc57d \uc774\ub7ec\ud55c \uc774\ub3d9\uc774 \uc5c6\uc774 \ubb3c\uccb4\ub97c \uadf8\ub824\uc900\ub2e4\uba74 \ubb3c\uccb4\uc758 \uc704\uce58\uc640 \ub208\uc758 \uc704\uce58\uac00 \uac19\uac8c \ub418\uc5b4\uc11c \ubb3c\uccb4\uac00 \ubcf4\uc774\uc9c0 \uc54a\uc73c\ubbc0\ub85c \ubb3c\uccb4\ub97c \ub4a4\ucabd\uc73c\ub85c \uc774\ub3d9\uc2dc\ucf1c\uc57c \uadf8\ub824\uc90c\uc73c\ub85c\uc368 \ubb3c\uccb4\uac00 \uc798 \ubcf4\uc774\ub3c4\ub85d \ud574\uc8fc\ub294 \uac83\uc774\ub2e4.<\/P>
<3>\ubc88 \ucf54\ub4dc\uc5d0\uc11c <6>\ubc88 \ucf54\ub4dc\uae4c\uc9c0 \uc9c0\uad6c\ub97c \uadf8\ub824\uc8fc\ub294 \uac83\uc774\ub2e4. \uc9c0\uad6c\ub294 \uc81c\uc790\ub9ac\uc5d0\uc11c \uc790\uc804\ub9cc \ud55c\ub2e4.<\/P>
<3>\ubc88 \ucf54\ub4dc\ub294 \uc9c0\uae08\uae4c\uc9c0 \ubcc0\ud658\ud589\ub82c\uc5d0 \uc758\ud574\uc11c \ubcc0\ud658\ub41c \uc88c\ud45c\ucd95\uc744 \uc800\uc7a5\ud574 \ub193\ub294 \uac83\uc774\ub2e4.<\/P>
<4>\ubc88 \ucf54\ub4dc\ub294 y\ucd95\uc744 \uae30\uc900\uc73c\ub85c\ud574\uc11c \ud68c\uc804\uc744 o1_rot \uac01 \ub9cc\ud07c \ud68c\uc804\uc744 \uc2dc\ud0a4\ub294 \uac83\uc774\ub2e4. \uacb0\uacfc\uc801\uc73c\ub85c <2>\ubc88 \ucf54\ub4dc\uc5d0\uc11c\uc758 \uc774\ub3d9 \ubcc0\ud658 \ud589\ub82c\uacfc <4>\ubc88 \ucf54\ub4dc\uc758 \ud68c\uc804 \ubcc0\ud658 \ud589\ub82c\uc758 \uc5f0\uc0b0\uc73c\ub85c \uc88c\ud45c\ucd95\uc774 \ubcc0\uacbd\ub420 \uac83\uc784\uc744 \uc54c\uc218\uc788\ub2e4.<\/P>
<5>\ubc88 \ucf54\ub4dc\ub4e4\uc740 \uc9c0\uad6c\ub97c \uadf8\ub824\uc8fc\ub294 \ucf54\ub4dc\ub4e4\uc774\ub2e4. (\uc790\uc138\ud55c \uc124\uba85\uc740 Quadric \uac1d\uccb4\ub97c \uc124\uba85\ud55c \uc7a5\uc744 \ucc38\uace0\ud558\uae30 \ubc14\ub780\ub2e4)<\/P>
<6>\ubc88 \ucf54\ub4dc\ub294 <3>\ubc88 \ucf54\ub4dc\uc5d0\uc11c \uc800\uc7a5\ud574\ub454 \uc88c\ud45c\ucd95\uc744 \uaebc\ub0b4\ub294 \uac83\uc778\ub370 \uc774\ub807\uac8c \ud568\uc73c\ub85c\uc368 <4>\ubc88 \ucf54\ub4dc\uc5d0 \uc758\ud574 \ubcc0\ud658\ub418\uae30 \uc774\uc804\uc758 \uc88c\ud45c\ucd95\uc73c\ub85c \ub418\ub3cc\ub9b4\uc218\uc788\ub2e4.<\/P>
<7>\ubd80\ud130 <12>\ubc88\uae4c\uc9c0\ub294 \ub2ec\uc744 \uadf8\ub824\uc8fc\ub294 \uac83\uc774\ub2e4. \ub2ec\uc740 \uc9c0\uad6c\ub97c \uc911\uc2ec\uc73c\ub85c \uacf5\uc804\ud558\uba70 \ub610 \uc2a4\uc2a4\ub85c \uc790\uc804\ud55c\ub2e4.<\/P>
<7>\ubc88 \ucf54\ub4dc \ub2e4\uc2dc \ubcc0\ud658\ud589\ub82c\uc744 \uc2a4\ud0dd\uc5d0 \uc800\uc7a5\ud55c\ub2e4.<\/P>
<8>\ubc88 \ucf54\ub4dc\ub294 y\ucd95\uc744 \uae30\uc900\uc73c\ub85c \ud68c\uc804\uc744 o2_rot1 \uac01 \ub9cc\ud07c \ud558\uac8c \ub41c\ub2e4.<\/P>
<9>\ubc88 \ucf54\ub4dc\ub294 x\ucd95\uc73c\ub85c distance\ub9cc\ud07c \uc774\ub3d9\uc744 \ud558\uac8c\ub41c\ub2e4. \uacb0\uacfc\uc801\uc73c\ub85c <8>\uacfc <9>\ubc88 \ucf54\ub4dc\uc5d0 \uc758\ud574\uc11c \ub2ec\uc740 \uc9c0\uad6c\ub97c \uc911\uc2ec\uc73c\ub85c \uacf5\uc804\uc744 \ud558\uac8c\ub418\ub294 \uac83\uc774\ub2e4.<\/P>
<10>\ubc88 \ucf54\ub4dc\ub294 y\ucd95\uc744 \uae30\uc900\uc73c\ub85c o2_rot2 \uac01 \ub9cc\ud07c \ud68c\uc804\ud558\uac8c \ub41c\ub2e4. \uc774 \ucf54\ub4dc\ub85c\uc368 \ub2ec\uc774 \uc790\uc804 \ud558\uac8c \ub41c\ub2e4.<\/P>
<8>, <9>, <10>\ubc88\uc758 \ubcc0\ud658\ud589\ub82c\uc758 \uc21c\uc11c\ub294 \uc911\uc694\ud558\ub2e4. \uc21c\uc11c\uac00 \ubc14\ub014 \uacbd\uc6b0 \uc6b0\ub9ac\uac00 \uc6d0\ud558\ub294 \ub3d9\uc791\uacfc \uc704\uce58\ub294 \uc798\ubabb\ub420 \uac83\uc774\ub2e4.<\/P>
<11>\ubc88 \ucf54\ub4dc\ub294 \ub2ec\uc744 \uadf8\ub824\uc8fc\ub294 \ucf54\ub4dc\ub4e4\uc774\ub2e4. (\uc790\uc138\ud55c \uc124\uba85\uc740 Quadric \uac1d\uccb4\ub97c \uc124\uba85\ud55c \uc7a5\uc744 \ucc38\uace0\ud558\uae30 \ubc14\ub780\ub2e4)<\/P>
<12>\ubc88 \ucf54\ub4dc\ub294 \ub2e4\uc2dc <7>\ubc88 \ucf54\ub4dc\uc5d0 \uc758\ud574\uc11c \uc800\uc7a5\ub41c \ubcc0\ud658 \ud589\ub82c\uc744 \uaebc\ub0b4\ub294 \uac83\uc774\ub2e4.<\/P>
<13>\ubc88 \ucf54\ub4dc\ub4e4\uc740 \uc9c0\uad6c\uc640 \ub2ec\uc758 \ud68c\uc804\uac01\ub4e4\uc744 \uc77c\uc815\ud558\uac8c \uc99d\uac00\uc2dc\ucf1c\uc8fc\ub294 \ucf54\ub4dc\ub4e4\uc774\ub2e4.<\/P>
\uc774\ub807\uac8c \uc815\ub9ac\ub97c \ud558\uba74 \ub418\uaca0\ub2e4. \ubb3c\uccb4 \ub9c8\ub2e4 \ud558\ub098\uc529\uc758 \uc9c0\uc5ed \uc88c\ud45c\uacc4\ub97c \ub454\ub2e4\ub294 \uac83\uc774\ub2e4. \uc989 PushMatrix\uc640 PopMatrix \uc0ac\uc774\uc5d0\uc11c \ubb3c\uccb4\uc758 \ubcc0\ud658 \ud589\ub82c\uc744 \uc815\uc758\ud574\uc8fc\uba74 \ub2e4\ub978 \ubb3c\uccb4\uc5d0\ub294 \uc804\ud600 \uc601\ud5a5\uc744 \ubc1b\uc9c0 \uc54a\uc73c\ubbc0\ub85c \uac01 \ubb3c\uccb4\ub9c8\ub2e4 \ub3c5\ub9bd\uc801\uc73c\ub85c \uc0dd\uac01\ud574\uc904 \uc218 \uc788\ub2e4.<\/P>
\uc774\uc0c1\uc73c\ub85c \uacf5\uac04\uc0c1\uc5d0 \ubb3c\uccb4\ub97c \uad6c\uc131\ud558\ub294 \uac83\uc5d0 \ub300\ud574\uc11c \ub9c8\uce60\uae4c \ud55c\ub2e4. \uc54c\uace0 \ubcf4\uba74 \uc26c\uc6b4 \ub0b4\uc6a9\uc774\uc9c0\ub9cc \ucc98\uc74c \uc811\ud560\ub54c\ub294 \uc5b4\ub824\uc6b8 \uc218 \uc788\ub2e4. \ube44\ub2e8 \ubaa8\ub4e0 \uacf5\ubd80\uac00 \uadf8\ub7ec\ud55c\uac83 \uac19\ub2e4. \uc774 \uc7a5\uc744 \ub450\ucc28\ub840 \uc7a5\ub3c4\ub9cc \uc77d\uc5b4 \ubcf8\ub2e4\uba74 \uaf64 \uc5ec\ub7ec\uc6b4 \uacf5\uac04\uc0c1\uc758 \ubb3c\uccb4\ub97c \uad6c\uc131\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574\uc11c\ub3c4 \uc54c\uc218\uc788\uc9c0 \uc54a\uc744\uae4c \uc2f6\ub2e4.<\/P>
\uc5ec\uae30\uc11c \ub9c8\uce58\uae30 \uc804\uc5d0 \ubcc0\ud658\ud589\ub82c\uc5d0 \uad00\ub828\ub41c API\uc5d0 \ub300\ud574\uc11c \uba87\uac00\uc9c0 \uc54c\uc544\ubcf4\ub3c4\ub85d \ud558\uaca0\ub2e4. \uba3c\uc800 \uc54c\uc544\ubcfc\uac83\uc740 glMulMatrix\ub77c\ub294 \ud568\uc218\uc778\ub370 \uc774 \ud568\uc218\ub294 \uae30\uc874\uc758 \ubcc0\ud658\ud589\ub82c\uc5d0 \uc774 \ud568\uc218\uc758 \uc778\uc790\ub85c\uc368 \uac16\ub294 4X4 \ubc30\uc5f4\ub85c \uc815\uc758\ub41c 4X4\ud589\ub82c\uc744 \uacf1\ud558\uac8c \ub41c\ub2e4. \uc790\uc2e0\ub9cc\uc758 \ubcc0\ud658 \ud589\ub82c\uc744 \uc0ac\uc6a9\ud560\uc218\uc788\ub294 \uc911\uc694\ud55c API\uc774\ub2e4. \uadf8\ub9ac\uace0 \ud604\uc81c\uc758 \ubcc0\ud658 \ud589\ub82c\uc774 \ubb34\uc5c8\uc778\uc9c0\ub97c \uc54c\uc544\ub0b4\ub294 \ud568\uc218\ub85c glGetDoublev\ub77c\ub294 \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uba74 \ub41c\ub2e4. \uc989 \ub2e4\uc74c\uacfc \uac19\uc740 \ud615\ud0dc\ub85c \uc0ac\uc6a9\ub41c\ub2e4.<\/P><\/p>\n
glGetDoublev(GL_MODELVIEW_MATRIX, v);<\/pre>\n
v\ub294 4X4\ud589\ub82c\uc758 16\uac1c\uc758 \uac12\uc774 \ucda9\ubd84\uc774 \ub4e4\uc5b4\uac08\uc218\uc788\ub294 GLdouble\ud615 \ubc30\uc5f4 \uacf5\uac04\uc778\ub370 4X4 \ubc30\uc5f4\uc774\uba74 \ucda9\ubd84\ud558\uaca0\ub2e4.
\n
\uc790, \uc774\ub85c\uc368 \uacf5\uac04\uc0c1\uc5d0 \ubb3c\uccb4\uc758 \uad6c\uc131\uc5d0 \ub300\ud574\uc11c \ub05d\ub9c8\uce60\uae4c \ud55c\ub2e4.<\/P><\/p>\n
<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\uc774 \uc7a5\uc5d0\uc11c\ub294 OpenGL\uc5d0\uc11c \uacf5\uac04\uc0c1\uc5d0 \ubb3c\uccb4\ub97c \uc6d0\ud558\ub294 \uc704\uce58\uc5d0 \uc704\uce58\uc2dc\ud0a4\uace0 \uc6d0\ud558\ub294 \ubc29\ud5a5\uc73c\ub85c \uc6c0\uc9c1\uc774\uac70\ub098 \ud68c\uc804\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf8\ub2e4. \ucd5c\uc885\uc801 \uc2e4\uc2b5\uc73c\ub85c \ub450\uac1c\uc758 \uad6c\ub97c \uc774\uc6a9\ud574\uc11c \uccab\ubc88\uc9f8 \uad6c\ub294 \ud654\uba74 \uc911\uc559\uc5d0\uc11c \uc81c\uc790\ub9ac\uc5d0\uc11c \ud68c\uc804\uc744 \ud558\uba70 \ub450\ubc88\uc9f8 \uad6c\ub294 \uccab\ubc88\uc9f8 \uad6c\ub97c \uc911\uc2ec\uc73c\ub85c \uc77c\uc815\ud55c \uac70\ub9ac\ub97c \uc720\uc9c0\ud558\uba74\uc11c \ub3d9\uc2dc\uc5d0 \uc790\uc2e0\uc758 \uc911\uc2ec\uc810\uc744 \uae30\uc900\uc73c\ub85c\ud574\uc11c \ud68c\uc804\ud558\ub294 \uac83\uc744 \uad6c\ud604\ud574 \ubcf8\ub2e4. \uc880\ub354 \ub2e4\ub974\uac8c \ud45c\ud604\ud55c\ub2e4\uba74 \uccab\ubc88\uc9f8 \uad6c\ub294 \uc790\uc804\ub9cc\uc744 \ud558\uba70 \ub450\ubc88\uc9f8 \uad6c \uc5ed\uc2dc \uc790\uc804\uc744 \ud558\uba74\uc11c … <\/p>\n
\ub354 \ubcf4\uae30 “[OpenGL Tutorial] Composition Objects”<\/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":[4],"tags":[3],"class_list":["post-62","post","type-post","status-publish","format-standard","hentry","category-opengl","tag-opengl"],"_links":{"self":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/62","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=62"}],"version-history":[{"count":3,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/62\/revisions"}],"predecessor-version":[{"id":3818,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/62\/revisions\/3818"}],"wp:attachment":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=62"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=62"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=62"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}