{"id":6367,"date":"2012-12-17T13:34:23","date_gmt":"2012-12-17T04:34:23","guid":{"rendered":"http:\/\/vitalify.jp\/blog\/?p=6367"},"modified":"2012-12-17T13:35:47","modified_gmt":"2012-12-17T04:35:47","slug":"webglhtml5%e3%81%a73dcg%e3%82%92%e5%8b%89%e5%bc%b7%e3%81%97%e3%81%a6%e3%81%bf%e3%81%9f%ef%bc%81-part3","status":"publish","type":"post","link":"https:\/\/vitalify.jp\/blog\/2012\/12\/webglhtml5%e3%81%a73dcg%e3%82%92%e5%8b%89%e5%bc%b7%e3%81%97%e3%81%a6%e3%81%bf%e3%81%9f%ef%bc%81-part3.html","title":{"rendered":"WebGL+HTML5\u30673DCG\u3092\u52c9\u5f37\u3057\u3066\u307f\u305f\uff01 Part3"},"content":{"rendered":"

\u3069\u3046\u3082\u3002\u55b6\u696d\u90e8\u306e\u4f0a\u85e4\u3067\u3059\u3002<\/p>\n

\u9577\u671f\u5316\u3057\u3066\u304a\u308a\u307e\u3059\u304c\u3001\u3001\u3001\u7d9a\u3051\u307e\u3059\uff01\uff01\uff01<\/p>\n

Part2<\/a>\u3067STEP3\u306e\u300c\u30b7\u30a7\u30fc\u30c0\u3092\u751f\u6210\uff06\u30b3\u30f3\u30d1\u30a4\u30eb\u300d\u307e\u3067\u8aac\u660e\u304c\u7d42\u308f\u308a\u307e\u3057\u305f\u306e\u3067\u3001\u4eca\u56de\u306e\u30d6\u30ed\u30b0\u3067\u306fSTEP4\u306e\u300c\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u3092\u7528\u610f\u300d\u3068STEP5\u306e\u300c\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u304b\u3089VBO(VertexBufferObject)\u3092\u751f\u6210\uff06\u30d0\u30a4\u30f3\u30c9\u300d\u3092\u66f8\u304d\u307e\u3059\u3002<\/p>\n

\u65e9\u901f\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u3092\u7528\u610f\u3057\u305f\u3044\u3068\u3053\u308d\u3067\u3059\u304c\u3001\u305d\u306e\u524d\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u30d7\u30ed\u30b0\u30e9\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306f\u306a\u3093\u305e\u3084\uff1f\uff1f
\nPart1<\/a>\u306e\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u30b7\u30a7\u30fc\u30c0(\u30d4\u30af\u30bb\u30eb\u30b7\u30a7\u30fc\u30c0)\u8aac\u660e\u90e8\u5206\u3001Part2\u306evarying\u8aac\u660e\u90e8\u5206\u3067\u3082\u66f8\u304d\u307e\u3057\u305f\u304c\u3001varying\u4fee\u98fe\u5b50\u5909\u6570\u3092\u5229\u7528\u3057\u3066\u30b7\u30a7\u30fc\u30c0\u9593\u3067\u9802\u70b9\u60c5\u5831\u3092\u6a4b\u6e21\u3057\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u3053\u306e\u6a4b\u6e21\u3057\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u30d7\u30ed\u30b0\u30e9\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308a\u3001WebGL\u5074\u3068\u306e\u9023\u4fc2\u3082\u3053\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n

\nvar vShader = setShader(“vertex”);
\nvar fShader = setShader(“fragment”);<\/p>\n

shaderProgram = gl.createProgram();
\ngl.attachShader(shaderProgram, vShader);
\ngl.attachShader(shaderProgram, fShader);
\ngl.linkProgram(shaderProgram);\n<\/p><\/div>\n

setShader\u95a2\u6570\u3067\u30d0\u30fc\u30c6\u30c3\u30af\u30b9\u30b7\u30a7\u30fc\u30c0(\u9802\u70b9\u30b7\u30a7\u30fc\u30c0)\u3068STEP3\u306e\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u30b7\u30a7\u30fc\u30c0(\u30d4\u30af\u30bb\u30eb\u30b7\u30a7\u30fc\u30c0)\u306e\u751f\u6210\uff06\u30b3\u30f3\u30d1\u30a4\u30eb\u307e\u3067\u5b9f\u65bd\u3057\u3001\u305d\u306e\u5f8c\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210(createProgram)\u3057\u3066\u3044\u307e\u3059\u3002
\n\u305d\u3057\u3066\u3001\u4f5c\u6210\u3057\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(shaderProgram)\u306b\u5404\u3005\u306e\u30b7\u30a7\u30fc\u30c0\u3092\u5272\u308a\u5f53\u3066\u305f(attachShader)\u5f8c\u306b\u30ea\u30f3\u30af(linkProgram)\u3057\u3066\u3044\u307e\u3059\u3002
\n\u3053\u308c\u3067\u30d1\u30e9\u30e1\u30fc\u30bf\u53d7\u3051\u6e21\u3057\u306e\u6e96\u5099\u306f\u5b8c\u4e86\u3057\u307e\u3057\u305f\u306e\u3067\u3001\u672c\u984c\u306e\u300c\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u306e\u7528\u610f\u300d\u3068\u300cVBO(VertexBufferObject)\u306e\u751f\u6210\uff06\u30d0\u30a4\u30f3\u30c9\u300d\u306b\u9032\u307f\u307e\u3059\u3002<\/p>\n


\n\u3010\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u3011
\n\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u3068\u306f3DCG\u7a7a\u9593\u306b\u8868\u793a\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u9802\u70b9\u60c5\u5831(\u5ea7\u6a19\u3001\u6cd5\u7dda\u3001\u30c6\u30af\u30b9\u30c1\u30e3\u5ea7\u6a19\u3001\u9802\u70b9\u8272\u306a\u3069)\u3067\u3059\u3002
\n\u4e09\u6b21\u5143\u7a7a\u9593\u4e0a\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8868\u793a\u3059\u308b\u305f\u3081\u3001\u4f4d\u7f6e\u60c5\u5831\u304c\u7121\u3051\u308c\u3070\u4f55\u3082\u8868\u793a\u3067\u304d\u307e\u305b\u3093\u3002\u3088\u3063\u3066\u4f4d\u7f6e\u60c5\u5831\u306f\u5fc5\u9808\u3067\u3059\u3002<\/p>\n

\u3010VBO(VertexBufferObject)\u3011
\nVBO\u306f\u5225\u540d\u9802\u70b9\u30d0\u30c3\u30d5\u30a1(VertexBuffer)\u3068\u3082\u547c\u3070\u308c\u3001\u547d\u540d\u306e\u901a\u308a\u9802\u70b9\u60c5\u5831\u3092\u4fdd\u6709\u3059\u308b\u305f\u3081\u306e\u30d0\u30c3\u30d5\u30a1\u3068\u306a\u308a\u307e\u3059\u3002
\n\u3053\u306eVBO\u306b\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3057\u305f\u60c5\u5831\u306f\u3001\u6700\u7d42\u7684\u306b\u306f\u30d0\u30fc\u30c6\u30c3\u30af\u30b9\u30b7\u30a7\u30fc\u30c0(\u9802\u70b9\u30b7\u30a7\u30fc\u30c0)\u306b\u901a\u77e5\u3057\u307e\u3059\u3002<\/p>\n

\u300c\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u306e\u7528\u610f\u300d\u3068\u300cVBO(VertexBufferObject)\u306e\u751f\u6210\uff06\u30d0\u30a4\u30f3\u30c9\u300d\u90e8\u5206\u306f\u4ee5\u4e0b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\nvboPosition = gl.createBuffer();
\ngl.bindBuffer(gl.ARRAY_BUFFER, vboPosition);
\nposition = [
\n -1.0, -1.0, 1.0,
\n 1.0, -1.0, 1.0,
\n 1.0, 1.0, 1.0,
\n -1.0, 1.0, 1.0,<\/p>\n

-1.0, -1.0, -1.0,
\n -1.0, 1.0, -1.0,
\n 1.0, 1.0, -1.0,
\n 1.0, -1.0, -1.0,<\/p>\n

-1.0, 1.0, -1.0,
\n -1.0, 1.0, 1.0,
\n 1.0, 1.0, 1.0,
\n 1.0, 1.0, -1.0,<\/p>\n

-1.0, -1.0, -1.0,
\n 1.0, -1.0, -1.0,
\n 1.0, -1.0, 1.0,
\n -1.0, -1.0, 1.0,<\/p>\n

1.0, -1.0, -1.0,
\n 1.0, 1.0, -1.0,
\n 1.0, 1.0, 1.0,
\n 1.0, -1.0, 1.0,<\/p>\n

-1.0, -1.0, -1.0,
\n -1.0, -1.0, 1.0,
\n -1.0, 1.0, 1.0,
\n -1.0, 1.0, -1.0,
\n];
\ngl.bufferData(gl.ARRAY_BUFFER, new Float32Array(position), gl.STATIC_DRAW);<\/p>\n

vboSurface = gl.createBuffer();
\ngl.bindBuffer(gl.ARRAY_BUFFER, vboSurface);
\nvar surface = [
\n 0.0, 0.0,
\n 1.0, 0.0,
\n 1.0, 1.0,
\n 0.0, 1.0,<\/p>\n

1.0, 0.0,
\n 1.0, 1.0,
\n 0.0, 1.0,
\n 0.0, 0.0,<\/p>\n

0.0, 1.0,
\n 0.0, 0.0,
\n 1.0, 0.0,
\n 1.0, 1.0,<\/p>\n

1.0, 1.0,
\n 0.0, 1.0,
\n 0.0, 0.0,
\n 1.0, 0.0,<\/p>\n

1.0, 0.0,
\n 1.0, 1.0,
\n 0.0, 1.0,
\n 0.0, 0.0,<\/p>\n

0.0, 0.0,
\n 1.0, 0.0,
\n 1.0, 1.0,
\n 0.0, 1.0,
\n];
\ngl.bufferData(gl.ARRAY_BUFFER, new Float32Array(surface), gl.STATIC_DRAW);<\/p>\n

vboIndex = gl.createBuffer();
\ngl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, vboIndex);
\nvar index = [
\n 0, 1, 2,
\n 0, 2, 3,
\n 4, 5, 6,
\n 4, 6, 7,
\n 8, 9, 10,
\n 8, 10, 11,
\n 12, 13, 14,
\n 12, 14, 15,
\n 16, 17, 18,
\n 16, 18, 19,
\n 20, 21, 22,
\n 20, 22, 23
\n];
\ngl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(index), gl.STATIC_DRAW);<\/p>\n

cubeTexture = gl.createTexture();
\ncubeImage = new Image();
\ncubeImage.src = “.\/images\/logo.gif”;
\ncubeImage.onload = function () { mappingTexture(cubeTexture, cubeImage) }\n<\/p><\/div>\n

\u6570\u5b57\u3070\u304b\u308a\u3067\u982d\u304c\u75db\u304f\u306a\u308a\u307e\u3059\u306d\u3002
\n\u3053\u308c\u3092\u7406\u89e3\u3059\u308b\u306e\u306b\u9aea\u306e\u6bdb\u304c50\uff5e100\u672c\u307b\u3069\u629c\u3051\u305f\u306e\u3092\u899a\u3048\u3066\u3044\u307e\u3059\u3002\u3002\u3002<\/p>\n

\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u306f\u6570\u5024\u304c\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u4e0a\u306b\u306a\u3063\u3066\u3044\u308b\u3082\u306e\u3067\u3059\u3002(\u5206\u304b\u308a\u6613\u304f\u3059\u308b\u305f\u3081\u6539\u884c\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u5b9f\u969b\u306f\u5358\u7d14\u306a\u4e00\u6b21\u5143\u914d\u5217\u3067\u3059)
\n\u5ea7\u6a19\u3001\u6cd5\u7dda\u3001\u30c6\u30af\u30b9\u30c1\u30e3\u5ea7\u6a19\u3001\u9802\u70b9\u8272\u306a\u3069\u305d\u308c\u305e\u308c\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002
\n\u5206\u304b\u308a\u6613\u3044\u3001\u9802\u70b9\u5ea7\u6a19\u306e\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u306b\u3064\u3044\u3066\u7d30\u304b\u304f\u66f8\u304d\u307e\u3059\u3002
\n\u4eca\u56de\u306f\u7acb\u65b9\u4f53\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u3001\u6b63\u65b9\u5f62\u306e\u9762\u304c\u5408\u8a086\u3064\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u300cX\u3001Y\u3001Z\u306e\u5ea7\u6a19\u60c5\u5831\u300d\u00d7\u300c4\u3064\u306e\u9802\u70b9\u300d\u00d7\u300c6\u3064\u306e\u9762\u300d=> 72\u500b\u306e\u5ea7\u6a19\u60c5\u5831<\/p>\n

\nposition = [
\n -1.0, -1.0, 1.0,
\n 1.0, -1.0, 1.0,
\n 1.0, 1.0, 1.0,
\n -1.0, 1.0, 1.0,<\/p>\n

-1.0, -1.0, -1.0,
\n -1.0, 1.0, -1.0,
\n 1.0, 1.0, -1.0,
\n 1.0, -1.0, -1.0,<\/p>\n

-1.0, 1.0, -1.0,
\n -1.0, 1.0, 1.0,
\n 1.0, 1.0, 1.0,
\n 1.0, 1.0, -1.0,<\/p>\n

-1.0, -1.0, -1.0,
\n 1.0, -1.0, -1.0,
\n 1.0, -1.0, 1.0,
\n -1.0, -1.0, 1.0,<\/p>\n

1.0, -1.0, -1.0,
\n 1.0, 1.0, -1.0,
\n 1.0, 1.0, 1.0,
\n 1.0, -1.0, 1.0,<\/p>\n

-1.0, -1.0, -1.0,
\n -1.0, -1.0, 1.0,
\n -1.0, 1.0, 1.0,
\n -1.0, 1.0, -1.0,
\n];\n<\/p><\/div>\n

\u6b21\u306b\u4e0a\u8a18\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u3092VBO(VertexBufferObject)\u306b\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u3001VBO\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n

\nvboPosition = gl.createBuffer();
\ngl.bindBuffer(gl.ARRAY_BUFFER, vboPosition);\n<\/div>\n

createBuffer\u3067\u30d0\u30c3\u30d5\u30a1\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3057\u3001bindBuffer\u3067\u751f\u6210\u3057\u305f\u30d0\u30c3\u30d5\u30a1\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092WebGL\u306b\u30d0\u30a4\u30f3\u30c9\u3057\u3066\u3044\u307e\u3059\u3002
\nWebGL\u306b\u30d0\u30a4\u30f3\u30c9\u3067\u304d\u308b\u30d0\u30c3\u30d5\u30a1\u306f\u4e00\u5ea6\u306b\u4e00\u7a2e\u985e\u3060\u3051\u306b\u306a\u308b\u305f\u3081\u3001\u4ed6\u306e\u30d0\u30c3\u30d5\u30a1\u3092\u30d0\u30a4\u30f3\u30c9\u3057\u305f\u3044\u5834\u5408\u306f\u90fd\u5ea6\u30d0\u30a4\u30f3\u30c9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002
\n\u3053\u308c\u3067VBO\u306e\u751f\u6210\u307e\u3067\u3067\u304d\u305f\u306e\u3067\u3001bufferData\u3067\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf(position)\u3092VBO\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n

gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(position), gl.STATIC_DRAW);<\/p>\n

3DCG\u306e\u4e16\u754c\u3067\u306f\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306e\u6570\u5024\u306e\u7cbe\u5ea6\u304c\u91cd\u8981\u306b\u306a\u308b\u305f\u3081\u3001Float32Array\u3067\u6d6e\u52d5\u5c0f\u6570\u70b9\u3068\u3057\u3066\u30c7\u30fc\u30bf\u3092\u6e21\u3057\u3066\u3044\u307e\u3059\u3002
\n\u307e\u305f\u3001\u4eca\u56de\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(\u7acb\u65b9\u4f53)\u306f\u9759\u7684\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306a\u308b\u305f\u3081\u3001\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u306f\u9759\u7684(STATIC_DRAW)\u3067\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002
\n\u3053\u306e\u4e00\u9023\u306e\u6d41\u308c\u3067\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u306e\u7528\u610f\u3001VBO\u3078\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u307e\u3067\u304c\u5b8c\u4e86(\u9802\u70b9\u30b7\u30a7\u30fc\u30c0\u3092\u5229\u7528\u3067\u304d\u308b\u72b6\u614b)\u3068\u306a\u308a\u307e\u3059\u304c\u3001\u307e\u3060\u30b7\u30a7\u30fc\u30c0\u81ea\u4f53\u306b\u30c7\u30fc\u30bf\u3092\u6e21\u305b\u3066\u3044\u308b\u8a33\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002
\n\u30b7\u30a7\u30fc\u30c0\u3078\u306e\u30c7\u30fc\u30bf\u306e\u53d7\u3051\u6e21\u3057\u306fSTEP6\u300c\u5ea7\u6a19\u5909\u63db\u884c\u5217\u3092\u751f\u6210\uff06\u901a\u77e5\u300d\u3067\u66f8\u304b\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3059\u3002<\/p>\n

\u305d\u306e\u4ed6\u306e\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u3067\u3042\u308bvboSurface\u306f\u30c6\u30af\u30b9\u30c1\u30e3\u5ea7\u6a19\u306e\u60c5\u5831\u3001vboIndex\u306f\u30a8\u30ec\u30e1\u30f3\u30c8\u306e\u60c5\u5831\u3068\u306a\u308a\u307e\u3059\u3002
\n\u6700\u5f8c\u306e\u4ee5\u4e0b\u30ed\u30b8\u30c3\u30af\u3067\u306f\u30c6\u30af\u30b9\u30c1\u30e3\u3078\u753b\u50cf\u30c7\u30fc\u30bf\u3092\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u3066\u304a\u308a\u307e\u3059\u3002<\/p>\n

\ncubeTexture = gl.createTexture();
\ncubeImage = new Image();
\ncubeImage.src = “.\/images\/logo.gif”;
\ncubeImage.onload = function () { mappingTexture(cubeTexture, cubeImage) }\n<\/div>\n

\u6b8b\u3059\u3068\u3053\u308d\u3042\u30683STEP(6\uff5e8)\uff01\uff01
\n\u6b21\u3067\u7d42\u308f\u308b\u306f\u305a\uff01\uff01<\/p>\n

\u3067\u306f\u3067\u306f\u3002<\/p>\n

\n
<\/div><\/fb:like><\/div>\n
<\/g:plusone><\/div>\n
\"\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0\"<\/a>