{"id":876,"date":"2020-11-29T01:15:06","date_gmt":"2020-11-28T16:15:06","guid":{"rendered":"https:\/\/junk-box.net\/kuyo\/?p=876"},"modified":"2020-11-29T01:54:29","modified_gmt":"2020-11-28T16:54:29","slug":"material_part1","status":"publish","type":"post","link":"https:\/\/junk-box.net\/kuyo\/index.php\/2020\/11\/29\/material_part1\/","title":{"rendered":"\u753b\u50cf\u30de\u30c6\u30ea\u30a2\u30eb\u3092\u4f5c\u308b\uff08\u305d\u306e\uff11\uff09"},"content":{"rendered":"\n

\u4eca\u307e\u3067\u300c\u633f\u7d75\u753b\u5bb6\u306b\u306a\u308d\u3046\u300d\u3068\u3057\u3066\u3001MB-Lab\u3092\u7528\u3044\u305f\u30a2\u30cb\u30e1\u8abf3D\u4eba\u4f53\u30e2\u30c7\u30eb\u306b\u95a2\u3057\u3066\u691c\u8a0e\u3057\u3066\u304d\u307e\u3057\u305f\u3002
\u7c21\u5358\u3067\u306f\u306a\u3044\u3067\u3059\u3051\u308c\u3069\u3001\u670d\u3082\u7528\u610f\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u304d\u307e\u3057\u305f\u3002
\u670d\u3092\u4f5c\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u304f\u308b\u3068\u4eca\u5ea6\u306f\u67c4\u306b\u62d8\u308a\u305f\u304f\u306a\u3063\u3066\u304d\u307e\u3059\u3088\u306d\uff1f
\u30cd\u30c3\u30c8\u306b\u306f\u69d8\u3005\u306a\u753b\u50cf\u7d20\u6750\u304c\u3042\u3063\u3066\u3001\u4e2d\u306b\u306f\u7121\u6599\u3067\u63d0\u4f9b\u9802\u3051\u308b\u3082\u306e\u3082\u3042\u308a\u307e\u3059\u3002
\u3042\u308a\u304c\u305f\u3044\u3067\u3059\u306d\u3001\u4fbf\u5229\u306a\u4e16\u306e\u4e2d\u306b\u306a\u3063\u305f\u3082\u306e\u3067\u3059\u3002
\u305f\u3060\u4eca\u56de\u306f\u4e8c\u6b21\u5143\u753b\u50cf\u30de\u30c6\u30ea\u30a2\u30eb\u3092\u81ea\u5206\u3067\u751f\u6210\u3057\u3088\u3046\u3068\u3044\u3046\u8a66\u307f\u3067\u3059\u3002
\u304a\u4ed8\u304d\u5408\u3044\u3044\u305f\u3060\u3051\u308b\u3068\u5e78\u3044\u3067\u3059\u3002<\/p>\n\n\n\n

\u8af8\u5144\u59c9\u306f\u300c#\u3064\u3076\u3084\u304dglsl\u300d\u3068\u3044\u3046twitter\u306e\u30cf\u30c3\u30b7\u30e5\u30bf\u30b0\u3092\u3054\u5b58\u3058\u3067\u3057\u3087\u3046\u304b\uff1f
https:\/\/twitter.com\/hashtag\/\u3064\u3076\u3084\u304dglsl<\/a><\/p>\n\n\n\n

\u753b\u50cf\u3084\u52d5\u753b\u3092\u8868\u793a\u3059\u308b\u305f\u3081\u306eglsl\u30b3\u30fc\u30c9\u3092280\u6587\u5b57\u4ee5\u4e0b\u3067twitter\u306b\u6295\u7a3f\u3059\u308b\u3082\u306e\u3067\u3059\u3002
\u6295\u7a3f\u3055\u308c\u305fglsl\u30b3\u30fc\u30c9\u306ftwigl.app<\/a>\u3068\u3044\u3046\u30b5\u30a4\u30c8\u3067\u5b9f\u884c\u30fb\u8868\u793a\u3067\u304d\u307e\u3059\u3002
\u300c#\u3064\u3076\u3084\u304dglsl\u300d\u306e\u6295\u7a3f\u306b\u306f\u3001\u6295\u7a3f\u30b3\u30fc\u30c9\u306b\u3088\u308a\u8868\u793a\u3055\u308c\u308b\u3067\u3042\u308d\u3046\u52d5\u753b\u3084\u753b\u50cf\u304c\u6dfb\u4ed8\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3059\u304c\u3001\u305d\u308c\u304c\u307e\u305f\u3068\u3066\u3082\u7f8e\u9e97\u306a\u3082\u306e\u3070\u304b\u308a\u3067\u3059\u3002
\u3053\u306e\u3088\u3046\u306a\u8907\u96d1\u3067\u7f8e\u3057\u3044\u8868\u73fe\u304c\u305f\u3063\u305f280\u6587\u5b57\u3067\u5b9f\u73fe\u3067\u304d\u308b\u306e\u3067\u3059\u3002
glsl\u3068\u306fOpenGL\u306e\u30b7\u30a7\u30fc\u30c0\u30fc\u8a00\u8a9e\u306a\u306e\u3067\u3059\u304c\u3001\u305d\u306e\u8868\u73fe\u529b\u306e\u8c4a\u304b\u3055\u306b\u9a5a\u304b\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

\u3068\u306f\u3044\u3048\u3001\u3044\u304d\u306a\u308a\u3053\u306e\u3088\u3046\u306a\u5320\u306e\u6280\u304c\u4f7f\u3048\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002
\u6280\u8853\u306f\u4e00\u3064\u4e00\u3064\u3001\u76ee\u7684\u610f\u8b58\u3092\u3082\u3063\u3066\u7fd2\u5f97\u3057\u3066\u3044\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3067\u3057\u3087\u3046\u3002
\u305d\u3057\u3066\u7fd2\u5f97\u3059\u308b\u3079\u304d\u6280\u8853\u306f\u3001\u7c21\u5358\u3067\u5f79\u306b\u7acb\u3064\u3082\u306e\u3092\u9078\u3076\u3079\u304d\u3067\u3059\u3002
\u672c\u6295\u7a3f\u306e\u76ee\u7684\u306fglsl\u306e\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u30b7\u30a7\u30fc\u30c0\u30fc\u3092\u7528\u3044\u3066\u4f1d\u7d71\u7684\u7d0b\u69d8\u3092\u8868\u73fe\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n

glsl\u306b\u9650\u3089\u305a\u3001\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u30b7\u30a7\u30fc\u30c0\u30fc\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u96e3\u89e3\u3067\u8907\u96d1\u306a\u8a00\u8a9e\u3067\u3059\u3002
\u4e16\u306e\u4e2d\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u8a00\u8a9e\u306f\u6570\u591a\u3042\u308c\u3069\u3001\u3053\u308c\u307b\u3069\u521d\u5fc3\u8005\u30ad\u30e9\u30fc\u306a\u8a00\u8a9e\u3082\u73cd\u3057\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\u3057\u304b\u3057\u6c42\u3081\u308b\u306a\u3089\u3070\u9053\u306f\u958b\u304b\u308c\u307e\u3059\u3002
\u975e\u5e38\u306b\u826f\u3044\u5165\u9580\u30b5\u30a4\u30c8\u304c\u3042\u308b\u306e\u3067\u3059\u3002
The Book of Shaders<\/a><\/p>\n\n\n\n

\u5168\u3066\u306e\u5165\u9580\u8005\u306f\u3053\u306e\u30b5\u30a4\u30c8\u3067\u5b66\u3076\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\u3053\u306e\u30b5\u30a4\u30c8\u306e\u826f\u3044\u3068\u3053\u308d\u306f\u3001\u5b9f\u969b\u306eglsl\u306e\u30b3\u30fc\u30c9\u3092WEB\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u78ba\u8a8d\u3067\u304d\u308b\u30b5\u30a4\u30c8\u3092\u7528\u610f\u3057\u3066\u304f\u308c\u3066\u3044\u308b\u3068\u3053\u308d\u3067\u3059\u3002
\u4ee5\u4e0b\u306eWEB\u30da\u30fc\u30b8\u3092\u958b\u3044\u3066\u304f\u3060\u3055\u3044\u3002
http:\/\/editor.thebookofshaders.com\/<\/a><\/p>\n\n\n\n

\u3053\u306eWEB\u30da\u30fc\u30b8\u306e\u5de6\u5074\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u63db\u3048\u308b\u3068\u3001\u5909\u66f4\u304c\u53f3\u5074\u306e\u753b\u50cf\u306b\u53cd\u6620\u3055\u308c\u307e\u3059\u3002
\u751f\u6210\u3055\u308c\u305f\u753b\u50cf\u306f\u53f3\u30af\u30ea\u30c3\u30af\u3067\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\u307e\u3055\u306b\u81f3\u308c\u308a\u5c3d\u304f\u305b\u308a\u3002
\u4ee5\u4e0b\u3001\u4f1d\u7d71\u7d0b\u69d8\u306eglsl\u30b3\u30fc\u30c9\u3092\u6652\u3057\u307e\u3059\u306e\u3067\u3001\u30b3\u30d4\u30da\u3057\u3066\u753b\u50cf\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002
\u305d\u3057\u3066\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u5909\u3048\u3066\u307f\u3066\u3001\u304a\u597d\u307f\u306e\u753b\u50cf\u306b\u5909\u66f4\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n

\u3067\u306f\u4e00\u756a\u7c21\u5358\u306a\u6a21\u69d8\u300c\u5e02\u677e\u300d\u304b\u3089\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u8272\u9055\u3044\u306e\u6b63\u65b9\u5f62\u3092\u4ea4\u4e92\u306b\u4e26\u3079\u3066\u3086\u304f\u7d0b\u69d8\u3067\u3059\u3002
\u6d0b\u306e\u6771\u897f\u3092\u554f\u308f\u305a\u53e4\u304f\u304b\u3089\u4eba\u6c17\u306e\u3042\u308b\u6a21\u69d8\u3067\u3059\u3002
glsl\u30b3\u30fc\u30c9\u306b\u3088\u308b\u5b9f\u88c5\u4f8b\u306f\u4ee5\u4e0b\u3002<\/p>\n\n\n

\n#ifdef GL_ES\nprecision mediump float;\n#endif\n\nuniform vec2 u_resolution;\nuniform float u_time;\n\nvoid main (void) {\n    vec2 st = gl_FragCoord.xy\/u_resolution.xy;\n\n    st *= 5.;\n    st = fract(st);\n    st *= 2.;\n    float index = 0.;\n    index += step(1., mod(st.x,2.));\n    index += step(1., mod(st.y,2.))*2.;\n    st = fract(st);\n\n    \/\/ c is color vector (r, g, b)\n    \/\/ white is (1., 1., 1.) and black is (0., 0., 0.)\n    vec3 c = vec3(1., .75, .12); \/\/ r, g, b \n\n    \/\/ index\n    \/\/ 0.:BL 1.:BR 2.:TL 3.:TR  \n    if(index == 1. || index == 2.){\n       c = vec3(1., .9, 0.);\n    }\n\n    gl_FragColor = vec4(c ,1.);\n}\n\n<\/pre><\/div>\n\n\n
\u5e02\u677e\u6a21\u69d8\u3092\u659c\u3081\u306b\u3057\u305f\u3082\u306e\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
glsl\u30b3\u30fc\u30c9\u306b\u3088\u308b\u5b9f\u88c5\u4f8b\u306f\u4ee5\u4e0b\u3002<\/p>\n\n\n
\n#ifdef GL_ES\nprecision mediump float;\n#endif\n\nuniform vec2 u_resolution;\nuniform float u_time;\n\nfloat lengthN(vec2 v, float n){\n  vec2 tmp = pow(abs(v), vec2(n));\n  return pow(tmp.x+tmp.y, 1.0\/n);\n}\n\nvoid main (void) {\n    vec2 st = gl_FragCoord.xy\/u_resolution.xy;\n\n    st *= 5.;\n    st = fract(st);\n    st *= 2.;\n    float index = 0.;\n    index += step(1., mod(st.x,2.));\n    index += step(1., mod(st.y,2.))*2.;\n    st = fract(st);\n\n    \/\/ index\n    \/\/ 0.:BL 1.:BR 2.:TL 3.:TR  \n    if(index == 1.){\n        st.x = 1.-st.x;\n    }\n    if(index == 2.){\n        st.y = 1.-st.y;\n    }\n    if(index == 3.){\n        st.x = 1.-st.x;\n        st.y = 1.-st.y;\n    }\n    st *= 0.5;\n\n    \/\/ c is color vector (r, g, b)\n    \/\/ white is (1., 1., 1.) and black is (0., 0., 0.)\n    vec3 c = vec3(1., 0., 0.);\n    float l=lengthN(st,1.);\n    if (lengthN(st,1.) > 0.5){\n       c = vec3(1., 1., 0.);\n    }\n    gl_FragColor = vec4(c ,1.);\n}\n<\/pre><\/div>\n\n\n
\u6b21\u306f\u300c\u4e03\u5b9d\u300d\u3002
\u5186\u3092\u659c\u3081\u306b\u305a\u3089\u3057\u306a\u304c\u3089\u91cd\u306d\u3066\u3044\u304f\u7d0b\u69d8\u3067\u3059\u3002
\u5186\u3068\u5186\u306e\u91cd\u8907\u90e8\u5206\u3067\u8272\u3092\u5909\u3048\u308b\u3053\u3068\u306b\u3088\u308a\u661f\u304c\u73fe\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
glsl\u30b3\u30fc\u30c9\u306b\u3088\u308b\u5b9f\u88c5\u4f8b\u306f\u4ee5\u4e0b\u3002<\/p>\n\n\n
\n#ifdef GL_ES\nprecision mediump float;\n#endif\n\n#define PI 3.14159265358979323846\n\nuniform vec2 u_resolution;\nuniform float u_time;\n\nvoid main (void) {\n    vec2 st = gl_FragCoord.xy\/u_resolution.xy;\n\n    st *= 5.;\n    st = fract(st);\n    st *= 2.;\n    float index = 0.;\n    index += step(1., mod(st.x,2.));\n    index += step(1., mod(st.y,2.))*2.;\n    st = fract(st);\n\n    \/\/ index\n    \/\/ 0.:BL 1.:BR 2.:TL 3.:TR  \n    if(index == 1. || index == 2.){\n        st.x = 1.-st.x;\n    }\n\n    \/\/ c is color vector (r, g, b)\n    \/\/ white is (1., 1., 1.) and black is (0., 0., 0.)\n    vec3 c = vec3(1., 0., 0.);\n    float d;\n    if ((distance(vec2(0., 0.), st)) &lt; 1. &amp;&amp; (distance(vec2(1., 1.), st)) &lt; 1.){\n       c = vec3(1., 1., 0.);\n    }\n    gl_FragColor = vec4(c ,1.);\n}\n<\/pre><\/div>\n\n\n
\u6b21\u306f\u300c\u9e7f\u5b50\u300d\u3067\u3059\u3002
\u9e7f\u306e\u80cc\u4e2d\u306e\u6a21\u69d8\u306e\u610f\u5320\u3067\u3059\u3002
\u7d5e\u308a\u67d3\u3081\u306e\u4ee3\u8868\u7684\u306a\u7d0b\u69d8\u3067\u3059\u306d\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
glsl\u30b3\u30fc\u30c9\u306b\u3088\u308b\u5b9f\u88c5\u4f8b\u306f\u4ee5\u4e0b\u3002<\/p>\n\n\n
\n#ifdef GL_ES\nprecision mediump float;\n#endif\n\nuniform vec2 u_resolution;\nuniform float u_time;\n\nfloat lengthN(vec2 v, float n){\n  vec2 tmp = pow(abs(v), vec2(n));\n  return pow(tmp.x+tmp.y, 1.0\/n);\n}\n\nvoid main (void) {\n    vec2 st = gl_FragCoord.xy\/u_resolution.xy;\n\n    st *= 5.;\n    st = fract(st);\n    st *= 2.;\n    float index = 0.;\n    index += step(1., mod(st.x,2.));\n    index += step(1., mod(st.y,2.))*2.;\n    st = fract(st);\n\n    \/\/ index\n    \/\/ 0.:BL 1.:BR 2.:TL 3.:TR  \n    if(index == 1.){\n        st.x = 1.-st.x;\n    }\n    if(index == 2.){\n        st.y = 1.-st.y;\n    }\n    if(index == 3.){\n        st.x = 1.-st.x;\n        st.y = 1.-st.y;\n    }\n    st *= 0.5;\n\n    \/\/ c is color vector (r, g, b)\n    \/\/ white is (1., 1., 1.) and black is (0., 0., 0.)\n    vec3 c = vec3(1., 0., 0.);\n    if (   (lengthN(st, .7) > 1.0 &amp;&amp; lengthN(st, .7) &lt; 1.2)\n        || (lengthN(st-.5, .7) > 1.0 &amp;&amp; lengthN(st-.5, .7) &lt; 1.2)){\n       c = vec3(1., 1., 0.);\n    }\n    gl_FragColor = vec4(c ,1.);\n}\n<\/pre><\/div>\n\n\n
\u6b21\u306f\u300c\u9c57\u300d\u3002
\u9c57\u7d0b\u69d8\u306b\u306f\u69d8\u3005\u306a\u30d1\u30bf\u30fc\u30f3\u304c\u3042\u308b\u306e\u3067\u3059\u3051\u308c\u3069\u3001\u4ee3\u8868\u7684\u306a\u306e\u306f\u8272\u9055\u3044\u306e\u4e8c\u7b49\u8fba\u4e09\u89d2\u5f62\u3092\u4e26\u3079\u3066\u3086\u304f\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
glsl\u30b3\u30fc\u30c9\u306b\u3088\u308b\u5b9f\u88c5\u4f8b\u306f\u4ee5\u4e0b\u3002<\/p>\n\n\n
\n#ifdef GL_ES\nprecision mediump float;\n#endif\n\nuniform vec2 u_resolution;\nuniform float u_time;\n\nfloat cross(vec2 v1, vec2 v2) {\n    return v1.x*v2.y - v1.y*v2.x;\n}\n\nvoid main (void) {\n    vec2 st = gl_FragCoord.xy\/u_resolution.xy;\n\n    st.x *= 10.;\n    st.y *= 6.;\n    st = fract(st);\n    st *= 2.;\n    float index = 0.;\n    index += step(1., mod(st.x,2.));\n    index += step(1., mod(st.y,2.))*2.;\n    st = fract(st);\n\n    \/\/ index\n    \/\/ 0.:BL 1.:BR 2.:TL 3.:TR  \n    if(index == 1. || index == 2.){\n        st.x = 1.-st.x;\n    }\n\n    \/\/ c is color vector (r, g, b)\n    \/\/ white is (1., 1., 1.) and black is (0., 0., 0.)\n    vec3 c = vec3(1., 0., 0.);\n    if (cross(st,normalize(vec2(1.,1.))) > 0.0){\n       c = vec3(1., 1., 0.);\n    }\n    gl_FragColor = vec4(c ,1.);\n}\n<\/pre><\/div>\n\n\n
\u6b21\u306f\u300c\u9752\u6d77\u6ce2\u300d\u3067\u3059\u3002
\u9c57\u7d0b\u69d8\u306e\u7279\u6b8a\u306a\u30d1\u30bf\u30fc\u30f3\u3067\u91cd\u306a\u308a\u5408\u3046\u6247\u304c\u6ce2\u306e\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
glsl\u30b3\u30fc\u30c9\u306b\u3088\u308b\u5b9f\u88c5\u4f8b\u306f\u4ee5\u4e0b\u3002<\/p>\n\n\n
\n#ifdef GL_ES\nprecision mediump float;\n#endif\n\n#define PI 3.14159265358979323846\n\nuniform vec2 u_resolution;\nuniform float u_time;\n\nvoid main (void) {\n    vec2 st = gl_FragCoord.xy\/u_resolution.xy;\n\n    st *= 5.;\n    st = fract(st);\n    st *= 2.;\n    float index = 0.;\n    index += step(1., mod(st.x,2.));\n    index += step(1., mod(st.y,2.))*2.;\n    st = fract(st);\n\n    \/\/ index\n    \/\/ 0.:BL 1.:BR 2.:TL 3.:TR  \n    if(index == 1. || index == 3.){\n        st.x = 1.-st.x;\n    }\n\n    float t;\n    float d;\n    if((d = distance( vec2(1., -.5), st)) &lt; 1.) {\n        t = abs(cos(d*2.65*PI));\n    }\n    else if ((d = distance( vec2(0., 0.), st)) &lt; 1.){\n        t = abs(cos(d*2.65*PI));\n    }\n    else{\n        t = abs(cos(distance(vec2(1., .5), st)*2.65*PI));\n    }\n\n    \/\/ c is color vector (r, g, b)\n    \/\/ white is (1., 1., 1.) and black is (0., 0., 0.)\n    vec3 c = vec3(1., 1., 1.);\n    if (t > 0.5){\n        c = vec3(0., .5, 1.);\n    }\n    gl_FragColor = vec4(c ,1.);\n}\n<\/pre><\/div>\n\n\n
\u3082\u3046\u4e00\u3064\u300c\u9c57\u300d\u7d0b\u69d8\u306e\u5909\u7a2e\u3002
\u7adc\u306e\u9c57\u3092\u30a4\u30e1\u30fc\u30b8\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
glsl\u30b3\u30fc\u30c9\u306b\u3088\u308b\u5b9f\u88c5\u4f8b\u306f\u4ee5\u4e0b\u3002<\/p>\n\n\n
\n#ifdef GL_ES\nprecision mediump float;\n#endif\n\n#define PI 3.14159265358979323846\n\nuniform vec2 u_resolution;\nuniform float u_time;\n\nvoid main (void) {\n    vec2 st = gl_FragCoord.xy\/u_resolution.xy;\n\n    st *= 5.;\n    st = fract(st);\n    st *= 2.;\n    float index = 0.;\n    index += step(1., mod(st.x,2.));\n    index += step(1., mod(st.y,2.))*2.;\n    st = fract(st);\n\n    \/\/ index\n    \/\/ 0.:BL 1.:BR 2.:TL 3.:TR  \n    if(index == 1. || index == 2.){\n        st.x = 1.-st.x;\n    }\n\n    float t;\n    float d;\n    if ((d = distance(vec2(0., 0.), st)) &lt; 1.){\n        t = abs(sin(d*3.15*PI));\n   }\n    else{\n        t = abs(sin(distance(vec2(1., st.y), vec2(st.x, 1.))*3.15*PI));\n    }\n\n    \/\/ c is color vector (r, g, b)\n    \/\/ white is (1., 1., 1.) and black is (0., 0., 0.)\n    vec3 c = vec3(1., 0., 0.);\n    if (t > 0.5){\n        c = vec3(0., 0., 0.);\n    }\n    gl_FragColor = vec4(c ,1.);\n}\n<\/pre><\/div>\n\n\n
\u6700\u5f8c\u306f\u300c\u7c60\u76ee\u300d\u7d0b\u69d8\u3002
\u7de8\u3093\u3060\u7c60\u306e\u76ee\u306e\u610f\u5320\u3067\u3059\u3002
\u516d\u8292\u661f\uff08\u30c0\u30d3\u30c7\u306e\u661f\uff09\u304c\u7121\u9650\u306b\u7d9a\u304f\u306e\u3067\u9b54\u9664\u3051\u3068\u3057\u3066\u306e\u5074\u9762\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
glsl\u30b3\u30fc\u30c9\u306b\u3088\u308b\u5b9f\u88c5\u4f8b\u306f\u4ee5\u4e0b\u3002<\/p>\n\n\n
\n#ifdef GL_ES\nprecision mediump float;\n#endif\n\nuniform vec2 u_resolution;\nuniform float u_time;\n\nfloat cross(vec2 v1, vec2 v2) {\n    return v1.x*v2.y - v1.y*v2.x;\n}\n\nvoid main (void) {\n    vec2 st = gl_FragCoord.xy\/u_resolution.xy;\n\n    st.x *= 10.;\n    st.y *= 6.;\n    st = fract(st);\n    st *= 2.;\n    float index = 0.;\n    index += step(1., mod(st.x,2.));\n    index += step(1., mod(st.y,2.))*2.;\n    st = fract(st);\n    st -= 0.5;\n\n    \/\/ index\n    \/\/ 0.:BL 1.:BR 2.:TL 3.:TR  \n    if(index == 1. || index == 2.){\n        st.x = -st.x;\n    }\n\n    float l1=abs(cross(st,normalize(vec2(1.,1.))));\n    float l2=length(vec2(0., st.y));\n\n    \/\/ c is color vector (r, g, b)\n    \/\/ white is (1., 1., 1.) and black is (0., 0., 0.)\n    vec3 c = vec3(1., .25, .25);\n    if (l1 &lt; .12 || l2 &lt; .07){\n       c = vec3(1., 1., .5);\n    }\n    gl_FragColor = vec4(c ,1.);\n}\n<\/pre><\/div>\n\n\n
\u3044\u304b\u304c\u3067\u3057\u3087\u3046\u304b\u3002
\u4f1d\u7d71\u7684\u306a\u7d0b\u69d8\u304c\u6bd4\u8f03\u7684\u7c21\u5358\u306aglsl\u30b3\u30fc\u30c9\u3067\u4f5c\u6210\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
\u6700\u8fd1\u3001\u9b3c\u6ec5\u306e\u5203\u306e\u5f71\u97ff\u3067\u65e5\u672c\u4f1d\u7d71\u306e\u67c4\u3082\u826f\u3044\u306a\u3042\u3068\u601d\u3063\u3066\u3044\u307e\u3059\u3002
\u540c\u58eb\u305f\u308b\u8af8\u5144\u59c9\u3082\u767b\u5834\u4eba\u7269\u306e\u30a4\u30e9\u30b9\u30c8\u306b\u548c\u30c6\u30a4\u30b9\u30c8\u306e\u670d\u3092\u7740\u305b\u3066\u307f\u3066\u306f\u3044\u304b\u304c\u3067\u3057\u3087\u3046\u304b\uff1f
\u6652\u3057\u305fglsl\u30b3\u30fc\u30c9\u3067\u306f\u5909\u6570 vec3 c \u304c\u30ab\u30e9\u30fc\u30b3\u30fc\u30c9\u3067\u3059\u3002
\u304a\u597d\u307f\u306e\u8272\u306b\u5909\u66f4\u3059\u308b\u3068\u826f\u3044\u304b\u3068\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4eca\u307e\u3067\u300c\u633f\u7d75\u753b\u5bb6\u306b\u306a\u308d\u3046\u300d\u3068\u3057\u3066\u3001MB-Lab\u3092\u7528\u3044\u305f\u30a2\u30cb\u30e1\u8abf3D\u4eba\u4f53\u30e2\u30c7\u30eb\u306b\u95a2\u3057\u3066\u691c\u8a0e\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u7c21\u5358\u3067\u306f\u306a\u3044\u3067\u3059\u3051\u308c\u3069\u3001\u670d\u3082\u7528\u610f\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u304d\u307e\u3057\u305f\u3002\u670d\u3092\u4f5c\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u304f\u308b\u3068\u4eca\u5ea6\u306f\u67c4\u306b\u62d8\u308a\u305f\u304f\u306a\u3063\u3066\u304d\u307e\u3059 … <\/p>\n
“\u753b\u50cf\u30de\u30c6\u30ea\u30a2\u30eb\u3092\u4f5c\u308b\uff08\u305d\u306e\uff11\uff09” \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":895,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-876","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1"],"wppr_data":{"cwp_meta_box_check":"No"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/junk-box.net\/kuyo\/index.php\/wp-json\/wp\/v2\/posts\/876","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/junk-box.net\/kuyo\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/junk-box.net\/kuyo\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/junk-box.net\/kuyo\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/junk-box.net\/kuyo\/index.php\/wp-json\/wp\/v2\/comments?post=876"}],"version-history":[{"count":12,"href":"https:\/\/junk-box.net\/kuyo\/index.php\/wp-json\/wp\/v2\/posts\/876\/revisions"}],"predecessor-version":[{"id":898,"href":"https:\/\/junk-box.net\/kuyo\/index.php\/wp-json\/wp\/v2\/posts\/876\/revisions\/898"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/junk-box.net\/kuyo\/index.php\/wp-json\/wp\/v2\/media\/895"}],"wp:attachment":[{"href":"https:\/\/junk-box.net\/kuyo\/index.php\/wp-json\/wp\/v2\/media?parent=876"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/junk-box.net\/kuyo\/index.php\/wp-json\/wp\/v2\/categories?post=876"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/junk-box.net\/kuyo\/index.php\/wp-json\/wp\/v2\/tags?post=876"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}