{"id":1007,"date":"2019-01-28T12:38:49","date_gmt":"2019-01-28T03:38:49","guid":{"rendered":"https:\/\/www.charlezz.com\/?p=1007"},"modified":"2021-03-22T22:16:17","modified_gmt":"2021-03-22T13:16:17","slug":"opengl-9-%ed%85%8d%ec%8a%a4%ec%b3%90-%ec%9e%88%eb%8a%94-%ec%82%ac%ea%b0%81%ed%98%95-%eb%a7%8c%eb%93%a4%ea%b8%b0","status":"publish","type":"post","link":"https:\/\/charlezz.com\/?p=1007","title":{"rendered":"[OpenGL] 9. \ud14d\uc2a4\uccd0 \uc788\ub294 \uc0ac\uac01\ud615 \ub9cc\ub4e4\uae30"},"content":{"rendered":"<h1>\ud14d\uc2a4\uccd0 \uc788\ub294 \uc0ac\uac01\ud615 \ub9cc\ub4e4\uae30<\/h1>\n<p>OpenGL\ub85c \uc0ac\uac01\ud615\uc744 \uadf8\ub9ac\ub294\uac83\uae4c\uc9c0 \uc131\uacf5\ud588\ub2e4\uba74, \ud14d\uc2a4\uccd0\ub97c \uc785\ud788\ub294\uac83\uc740 \uc5b4\ub835\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.\u00a0<br \/>\n\uc774\ubbf8 \ub9cc\ub4e4\uc5b4\ub454 \uc0ac\uac01\ud615\uc5d0\uc11c \uc250\uc774\ub354\ub97c \ud3ec\ud568\ud55c \uba87\uac00\uc9c0 \ucf54\ub4dc\ub97c \uc218\uc815\ud558\uc5ec \ud14d\uc2a4\uccd0\ub97c \ucd9c\ub825\ud558\ub3c4\ub85d \ud558\uaca0\uc2b5\ub2c8\ub2e4.<br \/>\n\uc0ac\uac01\ud615 \ub9cc\ub4e4\uae30\ub294 <a href=\"https:\/\/www.charlezz.com\/wordpress\/wp-admin\/post.php?post=892&amp;action=edit\">\ub9c1\ud06c<\/a>\ub97c \ucc38\uc870\ud574\uc8fc\uc138\uc694<\/p>\n<h2>UV \uc88c\ud45c\uacc4<\/h2>\n<p>OpenGL\uc5d0\uc11c \uc0ac\uac01\ud615\uc744 \uadf8\ub9b4\ub54c\ub294 \uc0bc\uac01\ud615 \ub450\uac1c\ub97c \uc774\uc5b4 \ubd99\uc778\ub2e4\ub294\uac83\uc744 \uc774\uc81c \uc54c\uac83\uc785\ub2c8\ub2e4. \uc0ac\uac01\ud615\uc73c\ub85c \ub41c \uc774\ubbf8\uc9c0\ub97c \uc0bc\uac01\ud615 \ub450\uac1c\ub85c \ub9cc\ub4e4\uc5b4\uc9c4 \uc0ac\uac01\ud615\uc5d0 \ud45c\ud604\ud558\uae30\uc704\ud574\uc11c\ub294 \ub9c8\ucc2c\uac00\uc9c0\ub85c \uc774\ubbf8\uc9c0\ub97c \uc0bc\uac01\ud615 \ubaa8\uc591\uc73c\ub85c \uc798\ub77c \uc804\ub2ec\ud558\ub294 \ubc29\ubc95\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. \uc774 \ub54c \ud544\uc694\ud55c\uac83\uc774 UV \uc88c\ud45c\uacc4\uc785\ub2c8\ub2e4.<\/p>\n<p>Android\uc758 OpenGL ES UV\uc88c\ud45c\uacc4\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<p><a href=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2019\/01\/www.charlezz.com-opengl-9-img.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2019\/01\/www.charlezz.com-opengl-9-img-1024x567.png\" alt=\"\" width=\"750\" height=\"415\" class=\"alignnone wp-image-44847 size-large\" srcset=\"https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2019\/01\/www.charlezz.com-opengl-9-img-1024x567.png 1024w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2019\/01\/www.charlezz.com-opengl-9-img-300x166.png 300w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2019\/01\/www.charlezz.com-opengl-9-img-768x425.png 768w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2019\/01\/www.charlezz.com-opengl-9-img.png 1107w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/a><\/p>\n<p>DirectX\uc640 \uac19\uc73c\uba70 \uc77c\ubc18\uc801\uc778 OpenGL\uacfc\ub294 \ubc18\ub300\uc785\ub2c8\ub2e4.<\/p>\n<p>UV \uc88c\ud45c\ub294 2\uac1c\uc758 float\ud615\uc73c\ub85c \ucc98\ub9ac\ud558\uba70, \ub450\uac1c\uc758 \ubaa8\ub4e0 \uac12\uc744 \ubc31\ubd84\uc728 ( 0~ 1) \ub85c \ucc98\ub9ac\ud569\ub2c8\ub2e4. \uadf8\ub7ec\ubbc0\ub85c 0.0f\uc774\uc0c1 1.0f\uc774\ud558\uc758 \uac12\uc73c\ub85c \ud45c\ud604\ub429\ub2c8\ub2e4.<\/p>\n<p>\ud558\ub098\uc758 \ub3c4\ud615\uc5d0 \ub2e4\uc74c\uacfc \uac19\uc774 \uc774\ubbf8\uc9c0\ub97c \uc798\ub77c \ub9e4\ud551\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p><a href=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2019\/01\/www.charlezz.com-opengl-9-texture-mapping.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2019\/01\/www.charlezz.com-opengl-9-texture-mapping.png\" alt=\"\" width=\"756\" height=\"371\" class=\"alignnone wp-image-44850 size-full\" srcset=\"https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2019\/01\/www.charlezz.com-opengl-9-texture-mapping.png 756w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2019\/01\/www.charlezz.com-opengl-9-texture-mapping-300x147.png 300w\" sizes=\"(max-width: 756px) 100vw, 756px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\uc0ac\uac01\ud615\uc5d0 \ub300\ud574\uc11c \ud558\ub098\uc758 \uc774\ubbf8\uc9c0(\ud14d\uc2a4\uccd0)\ub97c \ub9e4\ud551\ud558\uae30 \uc704\ud55c uv\uc88c\ud45c\uacc4\ub294 \uc704\uc758 \uadf8\ub9bc\uacfc \uac19\uc2b5\ub2c8\ub2e4. \uc0bc\uac01\ud615 \ub450\uac1c\uac00 \ub098\uc624\ub3c4\ub85d \uc0ac\uc120\uc73c\ub85c \uc790\ub978 \ud615\ud0dc\uc785\ub2c8\ub2e4. \uc0ac\uc9c4\uc758 \uc77c\ubd80\ub9cc \uc801\uc6a9\ud558\uace0 \uc2f6\ub2e4\uba74 uv\uc88c\ud45c\uacc4\ub97c \uc218\uc815\ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc704\uc758 \uadf8\ub9bc\uc744 \ucf54\ub4dc\ub85c \ud45c\ud604\ud55c\ub2e4\uba74 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<pre class=\"lang:java decode:true\">float[] vertices = new float[]{\r\n    -0.5f, -0.5f,  0f,  \/\/bottom left\r\n    0.5f, -0.5f,  0f,  \/\/bottom right\r\n    0.5f,  0.5f,  0f,  \/\/ top right\r\n    -0.5f,  0.5f,  0f, \/\/ top left\r\n};\r\n\r\nfloat[] uvs = new float[]{\r\n    0f,1f,\r\n    1f,1f,\r\n    1f,0f,\r\n    0f,0f\r\n};<\/pre>\n<table>\n<tbody>\n<tr>\n<td><em><strong>Warning : \uba54\uc26c\ub97c \ub9cc\ub4e4\ub54c \ub3d9\ucc28\uc88c\ud45c\uc0c1\uc758 \uc815\uc810\uacfc, uv\uc88c\ud45c\uc0c1\uc758 \uc815\uc810\uc758 \uc21c\uc11c\ub294 \uc77c\uce58\ud574\uc57c\ud569\ub2c8\ub2e4.<\/strong><\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h1>\ud14d\uc2a4\uccd0 \uc785\ud788\ub294 \uacfc\uc815<\/h1>\n<p>\ud14d\uc2a4\ucc98\ub97c \uc785\ud788\ub294 \uacfc\uc815\uc744 \uac04\ub2e8\ud788 \uc694\uc57d\ud558\uc790\uba74 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<table>\n<tbody>\n<tr>\n<td style=\"border-color: #000000; background-color: #ffffff; border-style: solid;\">\ud14d\uc2a4\uccd0 \uc0dd\uc131 &gt; \ud14d\uc2a4\ucc98 \ubc14\uc778\ub529 &gt; Bitmap \ub85c\ub4dc &gt; \uadf8\ub9ac\uae30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\uc774\uc81c \uc2e4\uc81c\ub85c \uad6c\ud604\ud558\ub294 \ucf54\ub4dc\ub97c \uc0b4\ud3b4\ubcf4\ub3c4\ub85d \ud558\uaca0\uc2b5\ub2c8\ub2e4. <br \/>\n\uc250\uc774\ub354\ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<pre class=\"lang:java decode:true\">\/\/\ubc84\ud14d\uc2a4 \uc250\uc774\ub354\r\nString vertexShader = \"uniform mat4 uMVPMatrix;\" +\r\n \"attribute vec4 vPosition;\" +\r\n \"attribute vec2 a_texCoord;\" +\r\n \"varying vec2 v_texCoord;\" +\r\n \"void main() {\" +\r\n \"  gl_Position = uMVPMatrix * vPosition;\" +\r\n \"  v_texCoord = a_texCoord;\"+\r\n \"}\";\r\n\r\n\/\/\ud504\ub808\uadf8\uba3c\ud2b8 \uc250\uc774\ub354\r\nString fragmentShader = \"precision mediump float;\" +\r\n \"varying vec2 v_texCoord;\"+\r\n \"uniform sampler2D s_texture;\"+\r\n \"void main() {\" +\r\n \"  gl_FragColor = texture2D(s_texture, v_texCoord);\" +\r\n \"}\";<\/pre>\n<p>\uae30\uc874\uc758 \ub2e8\uc0c9 \ubc30\uacbd\uc744 \uac16\ub294 \uc0ac\uac01\ud615\uc744 \uadf8\ub9b4\ub54c\uc640 \ub2ec\ub77c\uc9c4\uc810\uc774 \ubcf4\uc774\uc2dc\ub098\uc694?<br \/>\ngl_FragColor\uc5d0 \ub300\uc785\ub418\ub294 \uac12\uc774 \uceec\ub7ec\uac12\uc774 \uc544\ub2cc \ud14d\uc2a4\uccd0\uc774\uace0, texture2D\ud568\uc218\uc758 \uc778\uc790\ub85c \ud14d\uc2a4\uccd0\uc640 uv \uc88c\ud45c\uac12\uc744 \ubc1b\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<table style=\"border-color: #000000; border-style: solid;\">\n<tbody>\n<tr>\n<td><em>Notice : uv\ud578\ub4e4\ub7ec(a_texCoord)\ub97c \uc5bb\ub294\ubc29\uc2dd\uc740 \uc815\uc810\ud578\ub4e4\ub7ec \uc5bb\ub294\ubc29\uc2dd\uacfc \uc720\uc0ac\ud558\ubbc0\ub85c \ub0b4\uc6a9\uc5d0\uc11c \uc81c\uc678 \ud588\uc2b5\ub2c8\ub2e4.<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud14d\uc2a4\uccd0 \uc0dd\uc131 \ubc0f \ubc14\uc778\ub529<\/h2>\n<pre class=\"lang:java decode:true\">int[] textures = new int[1];\r\nGLES20.glGenTextures(1, textures, 0);<\/pre>\n<p>\ud14d\uc2a4\uccd0\ub97c 1\uac1c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/p>\n<pre class=\"lang:java decode:true\">GLES20.glActiveTexture(GLES20.GL_TEXTURE0);<\/pre>\n<p>\uccab\ubc88\uc9f8 \ud14d\uc2a4\uccd0\ub97c \ud65c\uc131\ud654 \ud569\ub2c8\ub2e4. \ud14d\uc2a4\uccd0\ub97c \ud55c\uac1c\ub9cc \uc0ac\uc6a9\ud560 \uacbd\uc6b0 \uc0dd\ub7b5 \uac00\ub2a5\ud569\ub2c8\ub2e4.<\/p>\n<pre class=\"lang:java decode:true \">GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textures[0]);<\/pre>\n<p>\ud14d\uc2a4\uccd0\ub97c \ubc14\uc778\ub529\ud569\ub2c8\ub2e4. textures[0]\uc758 \ud14d\uc2a4\uccd0\ub97c \uc0ac\uc6a9\ud558\uaca0\ub2e4\ub294 \ub73b\uc785\ub2c8\ub2e4. \uc544\uc9c1\uae4c\uc9c0\ub294 \ud574\ub2f9\ud14d\uc2a4\uccd0\uc5d0 \uc774\ubbf8\uc9c0\uac00 \ub85c\ub4dc\ub418\uc9c0 \uc54a\uc740 \uc0c1\ud0dc\uc785\ub2c8\ub2e4.<\/p>\n<pre class=\"lang:java decode:true\">GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);\r\nGLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);<\/pre>\n<p>\ud14d\uc2a4\uccd0\uc758 \ud06c\uae30\uac00 \ub9e4\ud551\ub418\ub294 \uc0bc\uac01\ud615\uacfc\uc758 \ud06c\uae30\uac00 \ub9de\uc9c0 \uc54a\uc744 \uacbd\uc6b0 \ucd95\uc18c\ud558\uac70\ub098 \ud655\ub300\ud560 \ub54c \uc5b4\ub5a4\uc2dd\uc73c\ub85c \ud544\ud130\ub9c1 \ud560\uac83\uc778\uc9c0 \uacb0\uc815\ud558\ub294 \ucf54\ub4dc\uc785\ub2c8\ub2e4. \ub354 \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 <a href=\"https:\/\/www.khronos.org\/registry\/OpenGL-Refpages\/es2.0\/xhtml\/glTexParameter.xml\">\ubb38\uc11c<\/a>\ub97c \ucc38\uc870\ud574\uc8fc\uc138\uc694.<\/p>\n<pre class=\"lang:java decode:true\">Bitmap bitmap = BitmapFactory.decodeResource(context, R.drawable.\ub9ac\uc18c\uc2a4\uc544\uc774\ub514);\r\nGLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0);<\/pre>\n<p>drawable \ub9ac\uc18c\uc2a4\ub85c\ubd80\ud130 \uc774\ubbf8\uc9c0 \ud558\ub098\ub97c \ubd88\ub7ec\uc640 Bitmap\uc73c\ub85c \ub9cc\ub4e0\ub4a4 GLUtils.texImage2D \uba54\uc18c\ub4dc\ub97c \uc774\uc6a9\ud558\uc5ec \ud604\uc7ac \ubc14\uc778\ub529\ub41c \ud14d\uc2a4\uccd0\uc5d0 \uc5f0\ub3d9\uc2dc\ud0a4\ub294 \uacfc\uc815\uc785\ub2c8\ub2e4.<\/p>\n<p>\uc774\uc81c \ud14d\uc2a4\uccd0\uc900\ube44\uac00 \ub05d\ub0ac\uc2b5\ub2c8\ub2e4. \ub098\uba38\uc9c0 \uc124\uc815\uc744 \ub9c8\uce58\uace0 \uadf8\ub9ac\uae30\ub97c \uc218\ud589\ud574\ubcf4\uc138\uc694. \uc774\ubbf8\uc9c0\uac00 \ucd9c\ub825\ub420\uac83\uc785\ub2c8\ub2e4.<\/p>\n<p>\ubcf8 \ud504\ub85c\uc81d\ud2b8\ub294 <a href=\"https:\/\/github.com\/Charlezz\/OpenGLStudy\">github<\/a>\uc5d0\uc11c \ud655\uc778 \uac00\ub2a5\ud569\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud14d\uc2a4\uccd0 \uc788\ub294 \uc0ac\uac01\ud615 \ub9cc\ub4e4\uae30 OpenGL\ub85c \uc0ac\uac01\ud615\uc744 \uadf8\ub9ac\ub294\uac83\uae4c\uc9c0 \uc131\uacf5\ud588\ub2e4\uba74, \ud14d\uc2a4\uccd0\ub97c \uc785\ud788\ub294\uac83\uc740 \uc5b4\ub835\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.\u00a0 \uc774\ubbf8 \ub9cc\ub4e4\uc5b4\ub454 \uc0ac\uac01\ud615\uc5d0\uc11c \uc250\uc774\ub354\ub97c \ud3ec\ud568\ud55c \uba87\uac00\uc9c0 \ucf54\ub4dc\ub97c \uc218\uc815\ud558\uc5ec \ud14d\uc2a4\uccd0\ub97c \ucd9c\ub825\ud558\ub3c4\ub85d \ud558\uaca0\uc2b5\ub2c8\ub2e4. \uc0ac\uac01\ud615 \ub9cc\ub4e4\uae30\ub294 \ub9c1\ud06c\ub97c \ucc38\uc870\ud574\uc8fc\uc138\uc694 UV \uc88c\ud45c\uacc4 OpenGL\uc5d0\uc11c \uc0ac\uac01\ud615\uc744 \uadf8\ub9b4\ub54c\ub294 \uc0bc\uac01\ud615 \ub450\uac1c\ub97c \uc774\uc5b4 \ubd99\uc778\ub2e4\ub294\uac83\uc744 \uc774\uc81c \uc54c\uac83\uc785\ub2c8\ub2e4. \uc0ac\uac01\ud615\uc73c\ub85c \ub41c \uc774\ubbf8\uc9c0\ub97c \uc0bc\uac01\ud615 \ub450\uac1c\ub85c \ub9cc\ub4e4\uc5b4\uc9c4 \uc0ac\uac01\ud615\uc5d0 \ud45c\ud604\ud558\uae30\uc704\ud574\uc11c\ub294 \ub9c8\ucc2c\uac00\uc9c0\ub85c \uc774\ubbf8\uc9c0\ub97c \uc0bc\uac01\ud615 \ubaa8\uc591\uc73c\ub85c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[24],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1007"}],"collection":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1007"}],"version-history":[{"count":5,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1007\/revisions"}],"predecessor-version":[{"id":44851,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1007\/revisions\/44851"}],"wp:attachment":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}