{"id":21,"date":"2005-05-04T06:20:00","date_gmt":"2005-05-04T06:20:00","guid":{"rendered":"http:\/\/www.gisdeveloper.co.kr\/?p=21"},"modified":"2017-01-29T20:04:20","modified_gmt":"2017-01-29T11:04:20","slug":"opengl-tutorial-lighting","status":"publish","type":"post","link":"http:\/\/www.gisdeveloper.co.kr\/?p=21","title":{"rendered":"[OpenGL Tutorial] Lighting"},"content":{"rendered":"

\"\uc0ac\uc6a9\uc790\ube5b, \uc774 \uc138\uc0c1\uc5d0 \ube5b\uc774 \uc5c6\ub2e4\uba74 \uacfc\uc5f0 \uc544\ub984\ub2e4\uc6c0\uc774\ub780 \uc874\uc7ac\ud560\uae4c. \uc544\ub9c8\ub3c4 \uc874\uc7ac\ud558\uc9c0 \uc54a\uc744 \uac83\uc774\ub2e4. \uc774\ucc98\ub7fc \ubcf4\uc774\ub294 \uac83\uc5d0\ub294 \ube5b\uc774\ub780 \uac83\uc73c\ub85c \ud558\uc5ec\uae08 \uc544\ub984\ub2e4\uc6c0\uc774\ub098 \ub354 \ubb34\uc5c8\ub2e4\uc6b4 \uac83\uc73c\ub85c \ubcf4\uc5ec\uc9c0\uac8c \ud55c\ub2e4. \uc774\ucc98\ub7fc \uc911\uc694\ud55c \ube5b\uc758 \uc0ac\uc6a9\uc744 OpenGL\uc5d0\uc11c \uc54c\uc544\ubcf4\uc790. \ube5b\uc5d0 \ub300\ud574 \uc124\uba85\ud560 \uac83\ub4e4\uc740 \ucc38\uc73c\ub85c \ub9ce\ub2e4. \ud558\ub098 \ud558\ub098 \uc9da\uc5b4\ubcf4\ub3c4\ub85d \ud558\uc790.<\/P>

\uc0c9\uc5d0\ub294 \ube68\uac15, \ucd08\ub85d, \ud30c\ub791\uc774 \uae30\ubcf8 \uc694\uc18c\uc774\ub4ef \ube5b\uc5d0\ub3c4 3\uac00\uc9c0\uc758 \uae30\ubcf8 \uc694\uc18c\uac00 \uc788\ub2e4. \uadf8\uac83\uc740 \uc8fc\ubcc0\uad11(Ambient), \ud655\uc0b0\uad11(Diffuse), \ubc18\uc0ac\uad11(Specular)\uc774\ub2e4. \uc774 \uc138\uac00\uc9c0\uc5d0 \ub300\ud55c \uc124\uba85\uc740 OpenGL Super Bible(page 268)\uc5d0 \ub098\uc624\ub294 \ub0b4\uc6a9\uc744 \uadf8\ub300\ub85c \uc62e\uae30\ub2c8 \uc798 \uc77d\uc5b4\ub450\uae38 \ubc14\ub780\ub2e4.<\/P>

Ambient Light<\/STRONG>
\ud2b9\uc815\ud55c \ubc29\ud5a5\uc774\uc5d0\uc11c \uc624\ub294 \ube5b\uc774 \uc544\ub2c8\ub2e4. \ube5b\uc758 \uadfc\uc6d0\uc740 \uc788\uc9c0\ub9cc \ubc29 \ud639\uc740 \uc7a5\uba74 \uc8fc\uc704\uc5d0\uc11c \ubc18\uc0ac\ub418\uc5b4 \ub4e4\uc5b4\uc624\uae30 \ub54c\ubb38\uc5d0 \ubc29\ud5a5\uc774 \uc5c6\ub294 \uad11\uc120\uc774\ub2e4. Ambient light\uc5d0 \uc758\ud574\uc11c \uc870\uba85\ub418\ub294 \ubb3c\uccb4\ub294 \uc804\uccb4\uc801\uc73c\ub85c \ubaa8\ub4e0 \ubc29\ud5a5\uc73c\ub85c\ubd80\ud130 \ube5b\uc774 \ube44\ucd94\uc5b4\uc9c4\ub2e4. \ubb3c\uccb4\ub97c \ud68c\uc804\uc2dc\ucf1c\ub3c4 Ambient Light\uc5d0 \uc758\ud574\uc11c \uc0c9\uc774 \ubcc0\ud558\uc9c0 \uc54a\ub294\ub2e4. \uc989, \ubc29\ud5a5\uc744 \uac16\uace0 \uc788\uc9c0 \uc54a\uc740 Ambient Light\uac00 \uadf8 \ubb3c\uccb4\ub97c \ube44\ucd94\uace0 \uc788\uc5c8\uae30 \ub54c\ubb38\uc5d0, \uc5b4\ub290 \uac01\ub3c4\uc5d0\uc11c\ub3c4 \uac19\uc740 \uc0c9\uc73c\ub85c \ubcf4\uc5ec\uc9c0\ub294 \uac83\uc774\ub2e4.<\/P>

Diffuse Light<\/STRONG>
\ud2b9\uc815\ud55c \ubc29\ud5a5\uc73c\ub85c \ube44\ucdb0\uc9c0\uc9c0\ub9cc, \uadf8 \ube5b\uc758 \ubc18\uc0ac\ub294 \uc5ec\ub7ec \ubc29\ud5a5\uc73c\ub85c \uc774\ub8e8\uc5b4\uc9c4\ub2e4. \ube5b\uc774 \uace8\uace0\ub8e8 \ubc18\uc0ac\ub41c\ub2e4 \ud558\ub354\ub77c\ub3c4, \ubb3c\uccb4\ub97c \ube44\uc2a4\ub4ec\ud788 \ube44\ucd9c \ub54c\ubcf4\ub2e4 \ubc14\ub85c \uc704\uc5d0\uc11c \ube44\ucd9c \ub54c\uac00 \ubb3c\uccb4 \ud45c\uba74\uc744 \ub354 \ubc1d\uac8c \ubcf4\uc778\ub2e4. \uc608\ub85c\uc368 \ud615\uad11\ub4f1\uc758 \ube5b\uc774\ub098 \uc624\ud6c4\uc5d0 \ucc3d\uc744 \ud1b5\ud574 \ub4e4\uc5b4\uc624\ub294 \ud587\ube5b\uc744 \uc0dd\uac01\ud558\uba74 \ub41c\ub2e4.<\/P>

Specular Light<\/STRONG>
\uc5ed\uc2dc \ubc29\ud5a5\uc744 \uac00\uc9c0\ub294 \ube5b\uc774\ub2e4. \ud558\uc9c0\ub9cc \uc0ac\ubc29\uc73c\ub85c \ubc2b\uc744 \ubc18\uc0ac\uc2dc\ud0a4\ub294 Diffuse Light\uc640\ub294 \ub2ec\ub9ac \ud2b9\uc815 \ubc29\ud5a5\uc73c\ub85c\ub9cc \ub69c\ub837\ud558\uac8c \ube5b\uc744 \ubc18\uc0ac\uc2dc\ud0a8\ub2e4. \uac15\ud55c Specular Light\uc774 \ubb3c\uccb4\uc5d0 \ub2ff\uc73c\uba74 \uadf8 \ud45c\uba74\uc5d0 Spot\uac00 \uc0dd\uae30\ub294\ub370 \uc774\uac83\uc744 Specular Highlight\ub77c\uace0 \ud55c\ub2e4.<\/P>

\uc790\uc2e0\uc774 \uc6d0\ud558\ub294 \ube5b\uc758 \uac12\uc744 \uc5bb\ub294\ub370\ub294 \uc815\ud655\ud55c \uacf5\uc2dd\uc774 \uc5c6\ub2e4. \ub9ce\uc740 \uc608\ub97c \uc811\ud574\ubd04\uc73c\ub85c\uc368 \ub290\ub08c\uc73c\ub85c \uc775\ud600\uc57c \ud55c\ub2e4. \uacfc\ud559\uc801 \uae30\uc220\uc5d0 \uc608\uc220\uc801 \uac10\uac01\uc774 \ud544\uc694\ud55c \uac83\uc774\ub2e4. \ube5b\uc744 \uc0ac\uc6a9\ud558\ub824\uba74 \uba87\uac00\uc9c0 \uc900\ube44\ud574\uc57c\ud560 \uac83\ub4e4\uc774 \ub9ce\ub2e4. \uccab\uc9f8\ub85c \ube5b\uc744 \ube44\ucd94\ub294 \uc870\uba85\uc774 \ud544\uc694\ud558\ub2e4. \ub458\uc9f8\ub85c \ubb3c\uccb4\uac00 \ud544\uc694\ud55c\ub2e4. \uc14b\uc9f8\ub85c \ube5b\uc774 \ubb3c\uccb4\uc5d0 \ube44\uce60\ub54c \ubc18\uc0ac\uac01\uc744 \uacb0\uc815\ud55c \ubc95\uc120\ubca1\ud130\uac00 \ud544\uc694\ud558\ub2e4. \ub137\uc9f8\ub85c \ubb3c\uccb4\uc758 \uc7ac\uc9c8\uc774 \ud544\uc694\ud55c\ub370 \uac19\uc740 \ube5b\uc774\ub77c\ub3c4 \uc5b4\ub5a4 \uc7ac\uc9c8\uc758 \ubb3c\uccb4\uac00 \ube5b\uc744 \ubc1b\ub290\ub0d0\uc5d0 \ub530\ub77c \ub2e4\ub974\uae30 \ub54c\ubb38\uc774\ub2e4. \uc774 \ub124\uac00\uc9c0\ub97c \ud558\ub098 \ud558\ub098 \uc775\ud600\ubcf4\ub3c4\ub85d\ud558\uc790.<\/P>

1. \ube5b\uc744 \ube44\ucd94\ub294 \uc870\uba85(Lighting Model Setting)<\/STRONG><\/P>

OpenGL\uc5d0\ub294 \ucd5c\ub300 9\uac1c\uc758 \ub3c5\ub9bd\uc801\uc774 \uad11\uc6d0\uc744 \uc124\uc815\ud558\uc5ec \uc0ac\uc6a9\ud560 \uc218 \uc788\uc73c\uba70 \uae30\ubcf8\uc801\uc73c\ub85c \ub514\ud3f4\ud2b8 \uad11\uc6d0\uc774 \ud558\ub098 \uc900\ube44\ub418\uc5b4\uc788\ub2e4. \ud558\uc9c0\ub9cc \uc77c\ubc18\uc801\uc73c\ub85c \ub514\ud3f4\ud2b8 \uad11\uc6d0\uc740 \uac74\ub4dc\ub9ac\uc9c0 \uc54a\uace0 \ub3c5\ub9bd\uc801\uc778 \uad11\uc6d0\uc744 \uc124\uc815\ud558\uc5ec \uc0ac\uc6a9\ud558\ub294\ub370 \uadf8 \uc774\uc720\ub294 \ub3c5\ub9bd\uc801\uc778 \uad11\uc6d0\uc740 \ubcf4\ub2e4 \ub354 \ub9ce\uc740 \uc124\uc815 \uc0ac\ud56d\uc774 \uc788\uc5b4 \ud504\ub85c\uadf8\ub798\uba38\uc758 \uc785\ub9db\uc5d0 \ub9db\ub294 \uad11\uc6d0\uc744 \uc5bb\uc744 \uc218 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4. \ub3c5\ub9bd\uc801\uc778 \uad11\uc6d0\uc758 \uc774\ub984\uc740 GL_LIGHT0, GL_LIGHT1, GL_LIGHT2, … \uc774\ub2e4. \uadf8\ub7fc \uc774 \ub3c5\ub9bd\uc801\uc778 \uad11\uc6d0\ub4e4\uc774 \uac00\uc9c0\ub294 \uc18d\uc131 \uac12\ub4e4\uc5d0\ub294 \uc5b4\ub5a4 \uac83\ub4e4\uc774 \uc788\uc744\uae4c? \uba3c\uc800 \uc704\uc5d0\uc11c \ub9d0\ud55c \uc138\uac00\uc9c0 Ambient, Diffuse, Specular Light\uac12\uc774 \uc788\ub2e4. \uadf8\ub9ac\uace0 \ube5b\uc758 \uc704\uce58. \ube5b\uc774 \uc2a4\ud3ec\ud2b8 \ub77c\uc774\ud2b8\uc774\ub77c\uba74 \uadf8\uc5d0 \ud574\ub2f9\ud558\ub294 \uc2a4\ud3ec\ud2b8 \ub77c\uc774\ud2b8 \uac12 \ub4f1\uc774\ub2e4. \uc5ec\uadf8\uc11c\ub294 \ube5b\uc5d0 \ub300\ud55c \ubaa8\ub4e0 \uac83\uc744 \ub2e4\ub8e8\uc9c0 \ubabb\ud558\uace0(\ud604\uc7ac \ud544\uc790\uc758 \uc9c0\uc2dd\uc758 \ud55c\uacc4) Ambient, Diffuse, Specular Light\uc640 \ube5b\uc758 \uc704\uce58\ub4e4 \ub9cc\uc73c\ub85c \ube5b\uc744 \uc0dd\uc131\ud558\uc5ec \ubcf4\uaca0\ub2e4. \ud2b9\ubcc4\ud55c \uc870\uba85 \uc7a5\uce58\uac00 \uc544\ub2cc \uc2e4\uc138\uacc4\uc758 \ubaa8\ub4e0 \ube5b\uc740 \uc774 \uc7a5\uc5d0\uc11c \uc5b8\uae09\ud558\ub294 \uac83\ub4e4\ub9cc\uc73c\ub85c \ucda9\ubd84\uc774 \uac00\ub2a5\ud558\ub2e4\uace0 \uc0dd\uac01\ud55c\ub2e4. \ud544\uc790\uc758 \ub2a5\ub825\uc774 \ud655\uc7a5\ub418\ub294\ub300\ub85c \uc18c\uac1c\ud560 \uac83\uc744 \uc57d\uc18d\ud55c\ub2e4. \uc0ac\uc2e4 \uadf8 \uc678\uc758 \ube5b\uc758 \uc18d\uc131\uac12\uc5d0 \ub300\ud55c \uac83\uc744 \uc2e4\uc81c\ub85c \uc0ac\uc6a9\ud574 \ubcf4\uc558\uc73c\ub098 \ub208\uc73c\ub85c \ubd84\uba85\ud558\uac8c \ub290\ub07c\uc9c0 \ubabb\ud574 \uc18c\uac1c\ud558\uae30\uac00 \uaec4\ub044\ub7fd\ub2e4. \uc790! \uadf8\ub7fc \ubcf8\uaca9\uc801\uc778 \ube5b\uc758 \uc18d\uc131\uac12\uc758 \uc124\uc815\uacfc \ube5b\uc758 \uc0ac\uc6a9\uc744 \uc9c0\uc2dc\ud558\ub294 \uc608\ub97c \ub4e4\uc5b4\ubcf4\uc790.<\/P>

\ud558\ub098\uc758 \uac00\uc815\uc744 \ud558\uc9c0 \uc800\uae30 \ub192\uc740 \uc5b4\ub290 \ud2b9\uc815\ud55c \uacf3\uc5d0 \uc804\uccb4\uc801\uc73c\ub85c \ub178\ub780\ube5b\uc744 \ub760\ub294 \ube5b\uc774 \uc788\ub2e4\uace0 \ud574\ubcf4\uc790. \uadf8\ub807\ub2e4\uba74 \ud558\uc580\uc0c9\uc758 \ubb3c\uccb4\ub294 \uadf8 \ub178\ub780\uc0c9\uc758 \ube5b\uc744 \ubc1b\uc544 \ub178\ub780\uc0c9\uc73c\ub85c \ubcf4\uc77c \uac83\uc774\ub2e4. \uadf8\ub807\ub2e4\uba74 \ub178\ub780\ube5b\uc744 \ub760\ub294 \ube5b\uc758 \uc18d\uc131\uac12\uc740 \uc5b4\ub5bb\uac8c \uc815\uc758\ud558\ub294\uac00? \uc815\uc758\ud558\ub294 \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/P><\/p>\n

GLfloat ambientLight[] = { 0.25f, 0.25f, 0.0f, 1.0f };     \/\/ <1>\r\nGLfloat diffuseLight[] = { 0.9f, 0.9f, 0.0f, 1.0f };       \/\/ <2>\r\nGLfloat lightPos[] = { -100.0f, 130.0f, 150.0f, 1.0f };    \/\/ <3>\r\n   \r\nglEnable(GL_LIGHTING);                                     \/\/ <4>\r\nglLightfv(GL_LIGHT0, GL_AMBIENT, ambientLight);            \/\/ <5>\r\nglLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);            \/\/ <6>\r\nglLightfv(GL_LIGHT0, GL_POSITION, lightPos);               \/\/ <7>\r\nglEnable(GL_LIGHT0);                                       \/\/ <8><\/pre>\n
1\ubc88 \ucf54\ub4dc\ub294 ambient light\uac12\uc744 \uc124\uc815\ud558\uae30 \uc704\ud55c \ubcc0\uc218\uc774\uace0 2\ubc88 \ucf54\ub4dc\ub294 diffuse light\uac12\uc744 \uc124\uc815\ud558\uae30 \uc704\ud55c \ubcc0\uc218\uc774\ub2e4. \ub178\ub780\uc0c9\uc744 \ub760\ub294 \ube5b\uc774\ubbc0\ub85c Ambient\uc740 \uc57d\ud55c \ub178\ub780\uc0c9\uc774\uace0 Diffuse\ub294 \uc870\uae08 \uac15\ud55c \ub178\ub780\uc0c9\uc758 \uc18d\uc131\uac12\uc744 \uc800\uc7a5\ud558\uae30 \uc704\ud55c \ucf54\ub4dc\uc774\ub2e4. 3\ubc88 \ucf54\ub4dc\ub294 \ube5b\uc758 \uc704\uce58\uac12\uc744 \uc800\uc7a5\ud558\uae30 \uc704\ud55c \ubcc0\uc218\uc774\ub2e4. 4\ubc88 \ucf54\ub4dc\ub294 \uc6b0\ub9ac\uac00 OpenGL\uc5d0\uc11c \ube5b\uc744 \uc0ac\uc6a9\ud558\uaca0\ub2e4\ub294 \uac83\uc774\ub2e4. 5\ubc88\uacfc 6\ubc88, 7\ubc88\uc740 \ube5b\uc758 \uac01\uac01\uc758 \uc18d\uc131\uac12\uc744 \uc2e4\uc81c\ub85c \uc124\uc815\ud558\uae30 \uc704\ud55c \uac83\uc778\ub370 \ubaa8\ub450 GL_LIGHT0\ub77c\ub294 \ube5b\uc758 \uc18d\uc131\uc744 \uc9c0\uc815\ud55c \uac83\uc774\ub2e4. \uacb0\uad6d 8\ubc88 \ucf54\ub4dc\uc5d0\uc11c \uc55e\uc5d0\uc11c GL_LIGHT0\uc758 \ube5b\uc744 \uc0ac\uc6a9\ud558\uaca0\ub2e4\uace0 \uc9c0\uc815\ud568\uc73c\ub85c\uc368 \uae30\ubcf8\uc801\uc778 \ube5b\uc758 \uac12\uc740 \uc124\uc815\ub418\uace0 \ube5b\uc774 \ucf1c\uc9c0\ub294 \uac83\uc774\ub2e4. \uadf8\ub7f0\ub370 \ud55c\uac00\uc9c0 \uc6b0\ub9ac\uac00 \uc54c\uc544\ubcf4\uc9c0 \ubabb\ud55c \ube5b\uc758 \uc18d\uc131\uc774 \uc788\ub2e4. \uadf8\uac83\uc740 \ubc14\ub85c Specular Light \uc18d\uc131\uc778\ub370 \ube5b\uc744 \uc815\uba74\uc5d0\uc11c \ubc1b\uc744 \uacbd\uc6b0 \uc815\uba74\uc5d0\uc11c \ubc1b\uc740 \ubb3c\uccb4\uc758 \uba74\uc774 \ub760\uac8c\ub420 \uc0c9\uc744 \uc800\uc815\ud574 \uc8fc\ub294 \uac83\uc774\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ube5b\uc744 \uc815\uba74\uc5d0\uc11c \ubc1b\uc73c\uba74 \uc21c\ubc31\uc0c9\uc744 \ub760\uac8c \ub418\ub294\ub370 \ub300\ubd80\ubd84 \ud558\uc580\uc0c9\uc744 \uc774 \uc18d\uc131\uac12\uc73c\ub85c \uc9c0\uc815\ud558\uac8c \ub41c\ub2e4. \uc989 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n
GLfloat specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };\r\nglLightfv(GL_LIGHT0, GL_SPECULAR, specular);<\/pre>\n
\uc774\uac83\uc73c\ub85c \ube5b\uc758 \uc18d\uc131\uac12\uc744 \uc124\uc815\ud558\ub294 \uac83\uc5d0 \ub300\ud574\uc11c \ub9c8\uce58\ub3c4\ub85d \ud558\uace0 \uc774\uc81c \ubb3c\uccb4\ub97c \ub9cc\ub4e4\uc5b4 \ubcf4\uc790.<\/P>
2. \ube5b\uc744 \ubc1b\ub294 \ubb3c\uccb4 \uadf8\ub9ac\uace0 \uba74<\/STRONG><\/P>
\ube5b\uacfc \ubb3c\uccb4\uc5d0\uc11c \uc911\uc694\ud55c \uac83\uc740 \ubc14\ub85c \uba74\uc5d0 \uc788\ub2e4. \uc989 \ube5b\uc774 \ubb3c\uccb4\uc758 \uba74\uc744 \ube44\ucd9c\ub54c \uc5b4\ub5bb\uac8c \ub418\ub294\uac00 \ud558\ub290\ub0d0\uc5d0 \ub530\ub77c \ub2e4\ub978 \uc7a5\uba74\uc744 \ub9cc\ub4e4\uc5b4 \ub0b8\ub2e4. \uc6b0\ub9ac\uac00 \uc54c\uace0 \uc788\ub4ef \uba74\uc5d0 \ube5b\uc774 \ube44\uce60\ub54c \uc218\uc9c1\uc73c\ub85c \ube44\uce58\ub294 \uacbd\uc6b0\uac00 \uc544\ub2cc\ub77c \uc870\uae08 \uacbd\uc0ac\uc9c0\uac8c \ube44\uce5c\ub2e4\uace0 \ud574\ubcf4\uc790. \uba74\uc5d0 \ube5b\uc774 \ub4e4\uc5b4\uc62c\ub54c\uc758 \uac01\uc744 \uc785\uc0ac\uac01\uc774\ub77c\uace0 \ud558\uace0 \ub098\uac08\ub54c\uc758 \ube5b\uc758 \uac01\ub3c4\ub97c \ubc18\uc0ac\uac01\uc774\ub77c\uace0 \ud558\uba74 \uba74\uc744 \uae30\uc900\uc73c\ub85c \uc11c\ub85c \uc785\uc0ac\uac01\uacfc \ubc18\uc0ac\uac01\uc740 \uac19\ub2e4. \uadf8\ub807\ub2e4\uba74 OpenGL\uc740 \uadf8 \uc785\uc0ac\uac01\uacfc \ubc18\uc0ac\uac01\uc744 \uc5b4\ub5a4\uc2dd\uc73c\ub85c \uc54c\uc218\uc788\uc744\uae4c? \uadf8\uac83\uc740 \ubc95\uc120\uc744 \uc774\uc6a9\ud558\ub294 \uac83\uc774\ub2e4. \uc989 \uba74\uc5d0 \ubc95\uc120\uc744 \uc815\uc758\ud574\uc90c\uc73c\ub85c\uc368 \ube5b\uc774 \uc5b4\ub290 \uac01\ub3c4\ub85c \uc785\uc0ac\ud558\uace0 \ub610 \ubc18\uc0ac\ud560\uc9c0\ub97c \uacb0\uc815\ud558\ub294 \uac83\uc774\ub2e4. \uc0ac\uc2e4 \ubc95\uc120\uc740 \uba74\uc5d0 \ud560\ub2f9\ub418\ub294\uac83\uc774 \uc544\ub2c8\ub77c \ud558\ub098\uc758 \uc810\uc5d0 \ud558\ub098 \uc774\uc0c1 \uc815\uc758\ub420\uc218\uc788\ub2e4. \uadf8\ub7ec\ub098 \uba74\uc744 \uc774\ub8e8\ub294 \uac01 \uc810\uc774 \uac19\uc740 \ubc95\uc120\ubc31\ud130\ub97c \uac00\uc9c4\ub2e4\uba74 \uadf8 \uba74\uc740 \ud558\ub098\uc758 \ubc95\uc120\ubc31\ud130\ub97c \uac00\uc9c4\ub2e4\uace0 \uc774\ud574\ud560 \uc218\uac00 \uc788\ub2e4. \uc989 \uc6b0\ub9ac\uac00 \ubb3c\uccb4\ub97c \uc815\uc758\ud574\uc904\ub54c \uac01\uc810\uc5d0 \ub300\ud574\uc11c \ubc95\uc120 \ubc31\ud130\ub97c \uc815\uc758\uc918\uc57c \uc6b0\ub9ac\uac00 \uc6d0\ud558\ub294 \ube5b\uc758 \ud6a8\uacfc\ub97c \uae30\ub300\ud560 \uc218 \uc788\ub2e4. \uae00\ub85c\uc368 \uc774\ud574\uac00 \ub418\uc9c0 \uc54a\ub294 \ub3c5\uc790\ub97c \uc704\ud574 \ub2e4\uc74c \uadf8\ub9bc\uc744 \uc81c\uc2dc\ud55c\ub2e4.<\/P>
\"\uc0ac\uc6a9\uc790<\/P>
\ub2e4\uc74c\uc73c\ub85c \uba74\uc5d0\ub294 \uc55e\uacfc \ub4a4\uac00 \uc788\ub2e4. \ube5b\uc744 \uace0\ub824\ud55c\ub2e4\uba74 \uba74\uc758 \uc55e\uba74\uacfc \ub4b7\uba74\uc744 \ubd84\uba85\ud558\uac8c \uc9c0\uc815\ud574 \uc918\uc57c \ud55c\ub2e4. \uc55e\uba74\uacfc \ub4b7\uba74\uc740 \uc5b4\ub5a4\uc2dd\uc73c\ub85c \uacb0\uc815\ud558\ub294\uac00? \uba74\uc740 \ud3f4\ub9ac\uace4\uc774\ub2e4. \ud3f4\ub9ac\uace4\uc740 \uac01 \uc810\ub4e4\ub85c \uc774\ub8e8\uc5b4\uc9c4 \ud3d0\uac01\ud615\uc778\ub370 \uc774 \uc810\ub4e4\uc744 \uc9c0\uc815\ud558\ub294 \ubc29\ud5a5\uc73c\ub85c \uc55e\uba74\uacfc \ub4b7\uba74\uc744 \uacb0\uc815\ud558\uac8c \ub41c\ub2e4. OpenGL\uc740 \uae30\ubcf8\uc801\uc73c\ub85c \ubc18\uc2dc\uacc4\ubc29\ud5a5\uc73c\ub85c \uba74\uc744 \uc9c0\uc815\ud560 \uacbd\uc6b0 \uc55e\uba74\uc774\uace0 \uadf8 \uba74\uc758 \ub2e4\ub978 \ubc29\ud5a5\uc758 \uba74\uc774 \ub4b7\uba74\uc774 \ub41c\ub2e4. \uadf8\ub7ec\uba74 \uc65c OpenGL\uc740 \uc55e\uba74\uacfc \ub4b7\uba74\uc744 \uad6c\ubd84\ud558\ub294\uac00? \uadf8\ub0e5 \uba74\uc774\uba74 \ucda9\ubd84\ud558\uc9c0 \uc54a\uc558\uc744\uae4c? \uadf8\uac83\uc740 \uaf2d \ud544\uc694\ud55c \uc5f0\uc0b0\ub9cc\uc744 \uc704\ud55c \uac83\uc774\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \uc815\uc721\uba74\uccb4\uc5d0\uc11c \uc548\ucabd\uc758 \uba74\ub4e4\uc740 \uc5f0\uc0b0\uc5d0\uc11c \uace0\ub824\ud560 \ud544\uc694\uac00 \uc5c6\ub2e4. \uc65c\ub0d0\ud558\uba74 \ubcfc \ud544\uc694\uac00 \uc5c6\uae30 \ub54c\ubb38\uc774\ub2e4. \uc989 \ubd88\ud544\uc694\ud55c \uacc4\uc0b0\uc744 \ud53c\ud558\uace0\uc790 \uc55e\uba74\uacfc \ub4b7\uba74\uc744 \uace0\ub824\ud55c \uac83\uc774\ub2e4. \ub610 \ud558\ub098\uc758 \uc774\uc720\ub294 \uc55e\uba74\uacfc \ub4b7\uba74\uc774 \uc11c\ub85c \ub2e4\ub978 \uc7ac\uc9c8\ub85c \uc774\ub8e8\uc5b4\uc84c\uc744 \uacbd\uc6b0\uc758 \uad6c\ud604\uc744 \uc704\ud574\uc11c\uc774\ub2e4.<\/P>
\uc815\ub9ac\ub97c \ud574\ubcf4\uc790. \ube5b\uc744 \ubc1b\ub294 \ubb3c\uccb4\uc5d0 \uc788\uc5b4\uc11c \uc6b0\ub9ac\uac00 \uace0\ub824\ud574\uc57c\ud560 \uac83\uc740 \ubc14\ub85c \ubc95\uc120\ubc31\ud130\uc640 \uc55e\uba74\uacfc \ub4b7\uba74\uc744 \uc815\ud655\ud788 \uad6c\ubd84\ud558\uc5ec\uc57c \ud55c\ub2e4\ub294 \uc810\uc774\ub2e4. \ub2e4\uc74c\uc758 \ucf54\ub4dc\ub294 \uadf8 \ub450\uac00\uc9c0\ub97c \ubd84\uba85\ud558\uac8c \uace0\ub824\ud55c \uac83\uc774\ub2e4.<\/P><\/p>\n
 glBegin(GL_QUADS);\r\n glNormal3f(0.0f, 0.0f, 1.0f);   \/\/ <1>\r\n glVertex3f(1.0f, 1.0f, 1.0f);   \/\/ <2>\r\n glVertex3f(-1.0f, 1.0f, 1.0f);  \/\/ <2>\r\n glVertex3f(-1.0f, -1.0f, 1.0f); \/\/ <2>\r\n glVertex3f(1.0f, -1.0f, 1.0f);  \/\/ <2>\r\n   \r\n glNormal3f(1.0f, 0.0f, 0.0f);\r\n glVertex3f(1.0f, 1.0f, 1.0f);\r\n glVertex3f(1.0f, -1.0f, 1.0f);\r\n glVertex3f(1.0f, -1.0f, -1.0f);\r\n glVertex3f(1.0f, 1.0f, -1.0f);\r\n   \r\n glNormal3f(0.0f, 0.0f, -1.0f);\r\n glVertex3f(1.0f, 1.0f, -1.0f);\r\n glVertex3f(1.0f, -1.0f, -1.0f);\r\n glVertex3f(-1.0f, -1.0f, -1.0f);\r\n glVertex3f(-1.0f, 1.0f, -1.0f);\r\n   \r\n glNormal3f(-1.0f, 0.0f, 0.0f);\r\n glVertex3f(-1.0f, 1.0f, -1.0f);\r\n glVertex3f(-1.0f, -1.0f, -1.0f);\r\n glVertex3f(-1.0f, -1.0f, 1.0f);\r\n glVertex3f(-1.0f, 1.0f, 1.0f);\r\n   \r\n glNormal3f(0.0f, -1.0f, 0.0f);\r\n glVertex3f(1.0f, -1.0f, -1.0f);\r\n glVertex3f(1.0f, -1.0f, 1.0f);\r\n glVertex3f(-1.0f, -1.0f, 1.0f);\r\n glVertex3f(-1.0f, -1.0f, -1.0f);\r\n   \r\n glNormal3f(0.0f, 1.0f, 0.0f);\r\n glVertex3f(-1.0f, 1.0f, -1.0f);\r\n glVertex3f(-1.0f, 1.0f, 1.0f);\r\n glVertex3f(1.0f, 1.0f, 1.0f);\r\n glVertex3f(1.0f, 1.0f, -1.0f);\r\n glEnd();<\/pre>\n
<1>\ucf54\ub4dc\uac00 \ubc14\ub85c \ubc95\uc120 \ubca1\ud130\ub97c \uc9c0\uc815\ud55c \uac83\uc778\ub370 \uc2dc\uc791\uc810\uc740 \ud56d\uc0c1 \uc6d0\uc810\uc774\ub2e4. \uc989 <1>\uc740 (0,0,0)\uc5d0\uc11c (0,0,1)\uae4c\uc9c0\uc758 \ubc31\ud130\uc774\ub2e4. OpenGL\uc758 \uc131\ub2a5\ud5a5\uc0c1\uc744 \uc704\ud574 \ubc95\uc120\ubc31\ud130\ub294 \ud56d\uc0c1 \ud06c\uae30\uac00 1\uc778 \ub2e8\uc704\ubca1\ud130\ub97c \uc0ac\uc6a9\ud55c\ub2e4. \ud55c\ubc88 \ubc95\uc120 \ubc31\ud130\ub97c \uc9c0\uc815\ud558\uba74 \ub2e4\uc74c\uc73c\ub85c \uc9c0\uc815\ub418\ub294 \uc88c\ud45c\ub4e4\uc740 \uadf8 \ubc95\uc120\ubca1\ud130\ub97c \uac16\uac8c \ub41c\ub2e4. <2>\ucf54\ub4dc\ub4e4\uc740 \uba74\uc744 \uad6c\uc131\ud558\ub294 \uac83\uc778\ub370 \uc55e\uba74\uc774\ub77c\ub294 \uac83\uc744 \ub098\ud0c0\ub0b4\uae30 \uc704\ud574 \uadf8 \uc9c0\uc815\uc21c\uc11c\uac00 \ubc18\uc2dc\uacc4\ubc29\ud5a5\uc774\ub2e4. \ub098\uba38\uc9c0 \uba74\ub4e4\uc5d0 \ub300\ud574\uc11c\ub3c4 \ubaa8\ub450 \ub9c8\ucc2c\uac00\uc9c0\uc774\ub2e4.
3. \ubb3c\uccb4\uc758 \uc7ac\uc9c8\uc758 \uc124\uc815(Material Setting)<\/STRONG><\/P>
\ubb3c\uccb4\uac00 \uc900\ube44\ub418\uc5c8\uc73c\ub098 \uc544\uc9c1 \ube5b\uc744 \ubc1b\uc544\ub4e4\uc774\uae30\uc5d0\ub294 \ubd80\uc871\ud558\ub2e4. \uc65c\ub0d0\ud558\uba74 \uac19\uc740 \ubaa8\uc591\uc758 \ubb3c\uccb4\ub77c\ub3c4 \ub098\ubb34\ub0d0 \uae08\uc18d\uc774\ub0d0\uc5d0 \ub530\ub77c\uc11c \ube5b\uc774 \ube44\uce58\ub294 \ubaa8\uc2b5\uc774 \ub2e4\ub974\uae30 \ub54c\ubb38\uc774\ub2e4. \uc989 \ubb3c\uccb4\uc758 \uc7ac\uc9c8\uc774 \ub530\ub77c \ub2e4\ub974\ub2e4\ub294 \ub9d0\uc774\ub2e4. \ubb3c\uccb4\uc758 \uc7ac\uc9c8\uc744 \uc124\uc815\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ub3c4\ub85d\ud558\uc790.
\ubb3c\uccb4\uac00 \uc7ac\uc9c8\ub85c\ub294 \uc5b4\ub5a4 \uc18d\uc131\ub4e4\uc774 \uc788\uc744\uae4c? Ambient, Diffuse, Specualr, Emission, Shiness\uac00 \uc788\ub2e4. \uc27d\uace0 \uc775\uc219\ud55c \ub9d0\ub85c \ud480\uc5b4\ubcf4\uba74 Ambient\ub294 \ubb3c\uccb4\uac00 \uc740\uc740\ud558\uac8c \ub098\ud0c0\ub0b4\ub294 \uc0c9\uc774\uace0 Diffuse\ub294 \ubb3c\uccb4\uc758 \uc8fc\ub41c \uc0c9\uc0c1\uc774\ub2e4. Specular\uc740 \ubb3c\uccb4\uac00 \ube5b\uc5d0 \uc815\uba74\uc73c\ub85c \ube44\uce60\ub54c \ub098\ud0c0\ub0b4\ub294 \uc0c9\uc774\uace0 Emisson\uc740 \uc870\uae08 \ub2e4\ub978 \uac83\uc73c\ub85c \ubc1c\uad11\uc0c9\uc774\ub2e4. Shiness\ub294 \ube5b\ub098\ub294 \uc815\ub3c4\ub97c \uc758\ubbf8\ud55c\ub2e4. \ubb3c\uccb4\uc758 \ub300\ubd80\ubd84\uc758 \uacbd\uc6b0 Ambient\uc640 Diffuse\ub294 \uac19\uc740 \uac12\uc744 \uac16\uc73c\uba70 \ube5b\uc744 \uc815\uba74\uc73c\ub85c \ubc1b\uc744\ub54c\uc758 \uc0c9\uc740 \uc21c\ubc31\uc0c9\uc774\ub2e4. Shiness\ub294 Spot Highlight\uc758 \ud06c\uae30\ub97c \ub098\ud0c0\ub0b4\ub294\ub370 \uadf8 \uac12\uc740 0~128\uc0ac\uc774\ub85c \ucee4\uc9c8\uc218\ub85d \uadf8 Spot Highlight\uc758 \ud06c\uae30\uac00 \uc791\uc544\uc9c0\uba74\uc11c \ub354\uc6b1 \uc9c4\ud558\uac8c \ub41c\ub2e4. \uadf8\ub7fc \uc608\ub97c \ub4e4\uc5b4\ubcf4\uc790. Shiness\uac00 10\uc815\ub3c4\uc774\uace0 \uc870\uae08 \ubc1d\uc740 \ud68c\uc0c9\uc758 \ubb3c\uccb4\uc778\ub370 \ube5b\uc744 \uc815\uba74\uc73c\ub85c \ubc1b\uc73c\uba74 \ud558\uc580\uc0c9\uc778 \ubb3c\uccb4\uc758 \uc7ac\uc9c8\uc744 \uc124\uc815\ud558\ub294 \uac83\uc744 \ucf54\ub4dc\ub85c \uc608\ub97c \ub4e4\uc5b4\ubcf4\uc790.<\/P><\/p>\n
GLfloat gray[] = {0.75f, 0.75f, 0.75f };\r\nGLfloat specular[] = {1.0f, 1.0f, 1.0f, 1.0f}\r\n\r\nglMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, gray);\r\nglMaterialfv(GL_FRONT, GL_SPECULAR, specref);\r\nglMateriali(GL_FRONT, GL_SHININESS, 10);<\/pre>\n
\uc774\ub807\uac8c \uc7ac\uc9c8\uc774 \uc9c0\uc815\ub418\uba74 \ub2e4\uc74c\uc5d0 \ub9cc\ub4e4\uc5b4\uc9c0\ub294 \ubaa8\ub4e0 \ubb3c\uccb4\ub294 \uc55e\uc5d0\uc11c \uc124\uc815\ub41c \uc7ac\uc9c8\ub85c \uc9c0\uc815\uc774 \ub41c\uac8c \ub41c\ub2e4. \ub610\ub2e4\ub978 \uac04\ub2e8\ud55c \uc7ac\uc9c8 \uc124\uc815\ubc95\uc774 \uc788\ub294\ub370 \uadf8\uac83\uc740 \uc6b0\ub9ac\uac00 \ub9ce\uc774 \uc0ac\uc6a9\ud558\ub294 glColor3f \ud568\uc218\ub97c \uc774\uc6a9\ud558\ub294 \uac83\uc774\ub2e4. \uc774\uac83\uc73c\ub85c \uac04\ub2e8\ud558\uac8c Ambient\uc640 Diffuse\ub97c \uc124\uc815\ud560 \uc218 \uc788\ub2e4. \uc704\uc758 \ucf54\ub4dc\uc640 \ub3d9\uc77c\ud55c \uc77c\uc744 \ud558\ub294 \ucf54\ub4dc\ub97c \ub2e4\uc2dc \uc608\ub85c \ub4e4\uc5b4\ubcf4\uba74 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n
GLfloat specular[] = {1.0f, 1.0f, 1.0f, 1.0f}\r\n\r\nglEnable(GL_COLOR_MATERIAL);\r\nglColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);\r\nglColor4f(0.75f, 0.75f, 0.75f, 1.0f);\r\nglMaterialfv(GL_FRONT, GL_SPECULAR, specref);\r\nglMateriali(GL_FRONT, GL_SHININESS, 10);<\/pre>\n
\ud55c\uac00\uc9c0 \uc8fc\ubaa9\ud560\ub9cc\ud55c \uac83\uc73c\ub85c GL_FRONT\ub77c\ub294 \uc778\uc790\uc778\ub370 \uc0c1\ubc18\ub418\ub294 \uc778\uc790\ub85c GL_BACK\uc774\ub2e4. \uc774\uac83\uc744 \uc774\uc6a9\ud558\uba74 \uba74\uc758 \uc55e\uba74\uacfc \ub4b7\uba74\uc758 \uc7ac\uc9c8\uc744 \uc11c\ub85c \ub2e4\ub974\uac8c \uc124\uc815\ud560 \uc218 \uc788\ub2e4. \ub450\uba74\uc744 \ub3d9\uc2dc\uc5d0 \uac19\uac8c \uc124\uc815\ud560 \uc218 \uc788\ub294 \uc778\uc790\ub85c GL_FRONT_AND_BACK\uc774\ub2e4.

\uc774\uc81c \ucd5c\uc885\uc801\uc73c\ub85c \uc804\uccb4\uc801\uc778 \uc18c\uc2a4 \ucf54\ub4dc\ub85c \uc774 \uc7a5\uc744 \uc815\ub9ac\ud558\ub3c4\ub85d \ud558\uaca0\ub2e4. \uc0ac\uc6a9\ud558\ub294 \ucf54\ub4dc\ub294 1\uc7a5\uc758 \uc18c\uc2a4 \ucf54\ub4dc\uc774\ub2e4.
\uba3c\uc800 \ubb3c\uccb4\ub97c \ud68c\uc804\uc2dc\ud0a4\ub294\ub370 \ud544\uc694\ud55c \ubcc0\uc218\uc774\ub2e4 \uc804\uc5ed \ubcc0\uc218\ub97c \uc120\uc5b8\ud558\ub294 \uacf3\uc5d0 \uc120\uc5b8\ud558\uc790.<\/P><\/p>\n
GLfloat rot = 0.0f;<\/pre>\n
\ube5b\uc744 \uc124\uc815\ud558\uace0 \uc7ac\uc9c8\uc744 \uc124\uc815\ud558\ub294 \ucf54\ub4dc\uac00 \ub4e4\uc5b4\uac08 \ud568\uc218\ub294 initGL \uc815\ub3c4\uac00 \uc54c\ub9de\uaca0\ub2e4.<\/P><\/p>\n
int InitGL(GLvoid) \/\/ All Setup For OpenGL Goes Here\r\n{\r\n    GLfloat ambientLight[] = { 0.25f, 0.25f, 0.0f, 1.0f };\r\n    GLfloat diffuseLight[] = { 0.9f, 0.9f, 0.0f, 1.0f };\r\n    GLfloat lightPos[] = { -100.0f, 130.0f, 150.0f, 1.0f };\r\n    GLfloat specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };\r\n    GLfloat specref[] = { 1.0f, 1.0f, 1.0f, 1.0f };\r\n   \r\n    glShadeModel(GL_SMOOTH); \/\/ Enable Smooth Shading\r\n    glClearColor(0.0f, 0.0f, 0.0f, 1.0f); \/\/ Black Background\r\n    glClearDepth(1.0f); \/\/ Depth Buffer Setup\r\n    glEnable(GL_DEPTH_TEST); \/\/ Enables Depth Testing\r\n    glEnable(GL_CULL_FACE); \/\/ \ub4b7\uba74\uc5d0 \ub300\ud574\uc11c\ub294 \uacc4\uc0b0\ud558\uc9c0 \ub9d0\ub77c\r\n    glFrontFace(GL_CCW);   \/\/ \uc2dc\uacc4\ubc29\ud5a5\uc774 \uc55e\uba74\uc774\ub2e4.\r\n    glEnable(GL_LIGHTING); \/\/ \ube5b\uc744 \uc0ac\uc6a9\ud55c\ub2e4.\r\n   \r\n    glLightfv(GL_LIGHT0, GL_AMBIENT, ambientLight);\r\n    glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);\r\n    glLightfv(GL_LIGHT0, GL_POSITION, lightPos);\r\n    glLightfv(GL_LIGHT0, GL_SPECULAR, specular);\r\n    glEnable(GL_LIGHT0); \/\/ 0\ubc88\ube5b\uc744 \uc0ac\uc6a9\ud55c\ub2e4.\r\n   \r\n    glEnable(GL_COLOR_MATERIAL); \r\n    glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);\r\n    glMaterialfv(GL_FRONT, GL_SPECULAR, specref);\r\n    glMateriali(GL_FRONT, GL_SHININESS, 10);\r\n   \r\n    glDepthFunc(GL_LEQUAL); \/\/ The Type Of Depth Testing To Do\r\n    \/\/ Really Nice Perspective    Calculations\r\n    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); \r\n   \r\n    return TRUE; \/\/ Initialization Went OK\r\n} <\/pre>\n
\uc2e4\uc81c\ub85c \ubb3c\uccb4\ub97c \uadf8\ub824\uc8fc\ub294 \ucf54\ub4dc\ub294 DrawScean \uc815\ub3c4 \uc54c\ub9de\uaca0\ub2e4.<\/p>\n
int DrawGLScene(GLvoid) \/\/ Here's Where We Do All The Drawing\r\n{\r\n    \/\/ Clear Screen And Depth    Buffer\r\n    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); \r\n    glLoadIdentity(); \/\/ Reset The Current Modelview Matrix\r\n    glTranslatef(0.0f, 0.0f, -7.0f);\r\n   \r\n    glColor3f(0.95f, 0.95f, 0.95f);\r\n   \r\n    glRotatef(rot, 1.0f, 1.0f, 1.0f);\r\n    glBegin(GL_QUADS);\r\n    glNormal3f(0.0f, 0.0f, 1.0f);\r\n    glVertex3f(1.0f, 1.0f, 1.0f);\r\n    glVertex3f(-1.0f, 1.0f, 1.0f);\r\n    glVertex3f(-1.0f, -1.0f, 1.0f);\r\n    glVertex3f(1.0f, -1.0f, 1.0f); \r\n   \r\n    glNormal3f(1.0f, 0.0f, 0.0f);\r\n    glVertex3f(1.0f, 1.0f, 1.0f);\r\n    glVertex3f(1.0f, -1.0f, 1.0f);\r\n    glVertex3f(1.0f, -1.0f, -1.0f);\r\n    glVertex3f(1.0f, 1.0f, -1.0f);\r\n   \r\n    glNormal3f(0.0f, 0.0f, -1.0f);\r\n    glVertex3f(1.0f, 1.0f, -1.0f);\r\n    glVertex3f(1.0f, -1.0f, -1.0f);\r\n    glVertex3f(-1.0f, -1.0f, -1.0f);\r\n    glVertex3f(-1.0f, 1.0f, -1.0f);\r\n  \r\n    glNormal3f(-1.0f, 0.0f, 0.0f);\r\n    glVertex3f(-1.0f, 1.0f, -1.0f);\r\n    glVertex3f(-1.0f, -1.0f, -1.0f);\r\n    glVertex3f(-1.0f, -1.0f, 1.0f);\r\n    glVertex3f(-1.0f, 1.0f, 1.0f);\r\n   \r\n    glNormal3f(0.0f, -1.0f, 0.0f);\r\n    glVertex3f(1.0f, -1.0f, -1.0f);\r\n    glVertex3f(1.0f, -1.0f, 1.0f);\r\n    glVertex3f(-1.0f, -1.0f, 1.0f);\r\n    glVertex3f(-1.0f, -1.0f, -1.0f);\r\n  \r\n    glNormal3f(0.0f, 1.0f, 0.0f);\r\n    glVertex3f(-1.0f, 1.0f, -1.0f);\r\n    glVertex3f(-1.0f, 1.0f, 1.0f);\r\n    glVertex3f(1.0f, 1.0f, 1.0f);\r\n    glVertex3f(1.0f, 1.0f, -1.0f);\r\n    glEnd();\r\n   \r\n    rot+=1.0f;\r\n    if(rot>359.0f) rot=1.0f;\r\n   \r\n    return TRUE;\r\n}<\/pre>\n
\uc2e4\uc81c \uc2e4\ud589\ub418\ub294 \ud654\uba74\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.
\n
\"\uc0ac\uc6a9\uc790<\/P>
\uc5b4\ub5a4\uac00? \ubc1d\uc740 \ud68c\uc0c9\uc758 \ubb3c\uccb4\uac00 \ub178\ub780 \ubd88\ube5b\ub54c\ubb38\uc5d0 \uc804\uccb4\uc801\uc73c\ub85c \ub178\ub780\uc0c9\uc744 \ub760\uac8c \ub418\ub294\ub370 \ubb3c\uccb4\uac00 \ud68c\uc804\ud560\ub54c\ub9c8\ub2e4 \ube5b\uc758 \uc601\ud5a5\uc73c\ub85c \ud604\uc2e4\uac10\uc788\uac8c \uc0c9\uc774 \ubcc0\ud55c\ub2e4.<\/P><\/p>\n
<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\ube5b, \uc774 \uc138\uc0c1\uc5d0 \ube5b\uc774 \uc5c6\ub2e4\uba74 \uacfc\uc5f0 \uc544\ub984\ub2e4\uc6c0\uc774\ub780 \uc874\uc7ac\ud560\uae4c. \uc544\ub9c8\ub3c4 \uc874\uc7ac\ud558\uc9c0 \uc54a\uc744 \uac83\uc774\ub2e4. \uc774\ucc98\ub7fc \ubcf4\uc774\ub294 \uac83\uc5d0\ub294 \ube5b\uc774\ub780 \uac83\uc73c\ub85c \ud558\uc5ec\uae08 \uc544\ub984\ub2e4\uc6c0\uc774\ub098 \ub354 \ubb34\uc5c8\ub2e4\uc6b4 \uac83\uc73c\ub85c \ubcf4\uc5ec\uc9c0\uac8c \ud55c\ub2e4. \uc774\ucc98\ub7fc \uc911\uc694\ud55c \ube5b\uc758 \uc0ac\uc6a9\uc744 OpenGL\uc5d0\uc11c \uc54c\uc544\ubcf4\uc790. \ube5b\uc5d0 \ub300\ud574 \uc124\uba85\ud560 \uac83\ub4e4\uc740 \ucc38\uc73c\ub85c \ub9ce\ub2e4. \ud558\ub098 \ud558\ub098 \uc9da\uc5b4\ubcf4\ub3c4\ub85d \ud558\uc790.\uc0c9\uc5d0\ub294 \ube68\uac15, \ucd08\ub85d, \ud30c\ub791\uc774 \uae30\ubcf8 \uc694\uc18c\uc774\ub4ef \ube5b\uc5d0\ub3c4 3\uac00\uc9c0\uc758 \uae30\ubcf8 \uc694\uc18c\uac00 \uc788\ub2e4. \uadf8\uac83\uc740 \uc8fc\ubcc0\uad11(Ambient), \ud655\uc0b0\uad11(Diffuse), \ubc18\uc0ac\uad11(Specular)\uc774\ub2e4. \uc774 … <\/p>\n
\ub354 \ubcf4\uae30 “[OpenGL Tutorial] Lighting”<\/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-21","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\/21","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=21"}],"version-history":[{"count":5,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/21\/revisions"}],"predecessor-version":[{"id":3812,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/21\/revisions\/3812"}],"wp:attachment":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}