2017-03-21 02:58:58

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[WebGL] Grimoire.js で Draco 形式のファイルを読み込んでみるテスト

// forked from cx20's "[WebGL] Grimoire.js で小惑星を表示させてみるテスト（フラットシェーディング編）" http://jsdo.it/cx20/WLYg
// forked from cx20's "[WebGL] Grimoire.js で小惑星を表示させてみるテスト" http://jsdo.it/cx20/UkgF
// forked from cx20's "[WebGL] Grimoire.js で３次元リサージュ図形を描いてみるテスト" http://jsdo.it/cx20/SM1B
// forked from cx20's "[WebGL] Grimoire.js でリサージュ図形を描いてみるテスト" http://jsdo.it/cx20/8Fx0
// forked from cx20's "[WebGL] Grimoire.js を試してみるテスト（VBO編）" http://jsdo.it/cx20/iUdQ
// forked from cx20's "[WebGL] Grimoire.js を試してみるテスト" http://jsdo.it/cx20/4ZEB
// forked from cx20's "[WebGL] jThree を試してみるテスト" http://jsdo.it/cx20/Go5s

// Module that exposes all the core funcionality of the Draco decoder.
const DracoModule = Module;

var isInitialized = false;
var isDracoLoaded = false;

var g_positions;
var g_indices;

this.phi += this.getAttribute('speed');
    //this.node.setAttribute('rotation', this.phi + ',' + this.phi + ',' + 0);
  },
});

gr(function () {
  var $$ = gr('#canvas');
  $$('mesh').addComponent('Rotate');
});

function loadOneModel() {
    let draco_file = new XMLHttpRequest();
    //draco_file.open("GET", "throw_14.drc", true);
    //draco_file.open("GET", "http://jsrun.it/assets/6/E/0/L/6E0Lv", true); // Itokawa Hayabusa 50k poly.drc
    draco_file.open("GET", "http://jsrun.it/assets/k/Y/X/g/kYXge", true); // Itokawa Hayabusa 200k poly.drc
    draco_file.responseType = "arraybuffer";
    draco_file.send();
    draco_file.onload = function(e) {
        loadGeometry(draco_file.response);
        isDracoLoaded = true;
    }
}

function loadGeometry(raw_data) {
    const buffer = new DracoModule.DecoderBuffer();
    let rawBuffer = raw_data;
    buffer.Init(new Int8Array(rawBuffer), rawBuffer.byteLength);
    const wrapper = new DracoModule.WebIDLWrapper();

/*
     * Determine what type is this file, mesh or point cloud.
     */
    const geometryType = wrapper.GetEncodedGeometryType(buffer);
    if (geometryType == DracoModule.TRIANGULAR_MESH) {
      console.log("Loaded a mesh.");
    } else if (geometryType == DracoModule.POINT_CLOUD) {
      console.log("Loaded a point cloud.");
    } else {
      console.log("Error: Unknown geometry type.");
    }
    convertDracoGeometryTo3JS(wrapper, geometryType, buffer);
}

function convertDracoGeometryTo3JS(wrapper, geometryType, buffer) {
    let dracoGeometry;
    if (geometryType == DracoModule.TRIANGULAR_MESH) {
      dracoGeometry = wrapper.DecodeMeshFromBuffer(buffer);
    } else {
      dracoGeometry = wrapper.DecodePointCloudFromBuffer(buffer);
    }
    DracoModule.destroy(buffer);

let numFaces, numPoints, numVertexCoordinates, numAttributes;
    // For output basic geometry information.
    let geometryInfoStr = "";
    if (geometryType == DracoModule.TRIANGULAR_MESH) {
      numFaces = dracoGeometry.num_faces();
      geometryInfoStr += "Number of faces loaded: " + numFaces.toString()
          + ".\n";
    } else {
      numFaces = 0;
    }
    
console.log(geometryInfoStr);

numPoints = dracoGeometry.num_points();
    count = numPoints;
    numVertexCoordinates = numPoints * 3;
    numAttributes = dracoGeometry.num_attributes();
    geometryInfoStr = "Number of points loaded: " + numPoints.toString() + ".\n";
    geometryInfoStr += "Number of attributes loaded: " +  numAttributes.toString() + ".\n";

// Get position attribute. Must exists.
    const posAttId = wrapper.GetAttributeId(dracoGeometry, Module.POSITION);
    if (posAttId == -1) {
      const errorMsg = "No position attribute found in the mesh.";
      console.log(errorMsg);
      DracoModule.destroy(wrapper);
      DracoModule.destroy(dracoGeometry);
      throw new Error(errorMsg);
    }
    const posAttribute = wrapper.GetAttribute(dracoGeometry, posAttId);
    const posAttributeData = new DracoModule.DracoFloat32Array();
    wrapper.GetAttributeFloatForAllPoints(dracoGeometry, posAttribute, posAttributeData);
    // Get color attributes if exists.
    const colorAttId = wrapper.GetAttributeId(dracoGeometry, Module.COLOR);
    let colAttributeData;
    if (colorAttId != -1) {
      geometryInfoStr += "\nLoaded color attribute.\n";
      const colAttribute = wrapper.GetAttribute(dracoGeometry, colorAttId);
      colAttributeData = new DracoModule.DracoFloat32Array();
      wrapper.GetAttributeFloatForAllPoints(dracoGeometry, colAttribute, colAttributeData);
    }

// Get normal attributes if exists.
    const normalAttId = wrapper.GetAttributeId(dracoGeometry, Module.NORMAL);
    let norAttributeData;
    if (normalAttId != -1) {
      geometryInfoStr += "\nLoaded normal attribute.\n";
      const norAttribute = wrapper.GetAttribute(dracoGeometry, normalAttId);
      norAttributeData = new DracoModule.DracoFloat32Array();
      wrapper.GetAttributeFloatForAllPoints(dracoGeometry, norAttribute, norAttributeData);
    }
console.log(geometryInfoStr);

var positions = [];
    var normals = [];
    var colors = [];
    var indices = [];
    
    for (let i = 0; i < numVertexCoordinates; i += 3) {
        positions.push(posAttributeData.GetValue(i+0));
        positions.push(posAttributeData.GetValue(i+1));
        positions.push(posAttributeData.GetValue(i+2));
    }

DracoModule.destroy(posAttributeData);
    if (colorAttId != -1)
      DracoModule.destroy(colAttributeData);
    if (normalAttId != -1)
      DracoModule.destroy(norAttributeData);

// For mesh, we need to generate the faces.
    if (geometryType == DracoModule.TRIANGULAR_MESH) {
      const numIndices = numFaces * 3;
      const ia = new DracoInt32Array();
      for (let i = 0; i < numFaces; ++i) {
        wrapper.GetFaceFromMesh(dracoGeometry, i, ia);
        indices.push(ia.GetValue(0));
        indices.push(ia.GetValue(1));
        indices.push(ia.GetValue(2));
      }
      DracoModule.destroy(ia);
    }
    DracoModule.destroy(wrapper);
    DracoModule.destroy(dracoGeometry);

g_positions = new Float32Array(positions);
    g_indices = new Uint32Array(indices);
}

[WebGL] Grimoire.js で Draco 形式のファイルを読み込んでみるテスト

[WebGL] Grimoire.js で Draco 形式のファイルを読み込んでみるテスト Draco 形式は Google の提唱する新しい 3D Mesh の圧縮形式です。＜対応した点＞・頂点データを Draco 形式で用意するよう対応。・index の数が 16bit の上限を超えたため、OES_element_index_uint 拡張を使用するよう変更。表示モデル： (25143) Itokawa - 3D Asteroid Catalogue https://space.frieger.com/asteroids/asteroids/25143-Itokawa Itokawa (Hayabusa, 200k poly) (OBJ 6.6 MB) https://space.frieger.com/asteroids/data/asteroids/models/i/25143_Itokawa_200k.obj → Draco 形式に変換して使用（6.6MB → 212KB）＜参考＞ ■ google/draco https://github.com/google/draco#javascript-decoder-api ■ three.js webgl - loaders - Draco loader https://storage.googleapis.com/demos.webmproject.org/draco/draco_loader_throw.html ■ [簡易版] WebGL で小惑星に光を当ててみるテスト（その３） http://jsdo.it/cx20/kWuS ■ three.js で Draco 形式のデータを表示してみるテスト（改） http://jsdo.it/cx20/y3XD ■ GLBoost で Draco 形式のデータを表示してみるテスト（調整中） http://jsdo.it/cx20/M6uB // forked from cx20's "[WebGL] Grimoire.js で小惑星を表示させてみるテスト（フラットシェーディング編）" http://jsdo.it/cx20/WLYg // forked from cx20's "[WebGL] Grimoire.js で小惑星を表示させてみるテスト" http://jsdo.it/cx20/UkgF // forked from cx20's "[WebGL] Grimoire.js で３次元リサージュ図形を描いてみるテスト" http://jsdo.it/cx20/SM1B // forked from cx20's "[WebGL] Grimoire.js でリサージュ図形を描いてみるテスト" http://jsdo.it/cx20/8Fx0 // forked from cx20's "[WebGL] Grimoire.js を試してみるテスト（VBO編）" http://jsdo.it/cx20/iUdQ // forked from cx20's "[WebGL] Grimoire.js を試してみるテスト" http://jsdo.it/cx20/4ZEB // forked from cx20's "[WebGL] jThree を試してみるテスト" http://jsdo.it/cx20/Go5s // Module that exposes all the core funcionality of the Draco decoder. const DracoModule = Module; var isInitialized = false; var isDracoLoaded = false; var g_positions; var g_indices; var GLExtRequestor = gr.lib.fundamental.Resource.GLExtRequestor; GLExtRequestor.request("OES_element_index_uint"); GLExtRequestor.request("OES_standard_derivatives"); var Geometry = gr.lib.fundamental.Geometry.Geometry; gr.registerComponent('Rotate', { attributes: { speed: { default: '1', converter: 'Number', }, }, $mount: function () { isInitialized = false; isDracoLoaded = false; loadOneModel(); }, $update: function () { if ( !isInitialized && isDracoLoaded ) { var gl = this.node.companion.get("gl"); var geometry = new Geometry(gl); geometry.addAttributes(g_positions, {POSITION:{size: 3}}); geometry.addIndex("default", g_indices, WebGLRenderingContext.TRIANGLES); gr("#canvas")("mesh").setAttribute("geometry", geometry); isInitialized = true; } this.phi += this.getAttribute('speed'); //this.node.setAttribute('rotation', this.phi + ',' + this.phi + ',' + 0); }, }); gr(function () { var $$ = gr('#canvas'); $$('mesh').addComponent('Rotate'); }); function loadOneModel() { let draco_file = new XMLHttpRequest(); //draco_file.open("GET", "throw_14.drc", true); //draco_file.open("GET", "http://jsrun.it/assets/6/E/0/L/6E0Lv", true); // Itokawa Hayabusa 50k poly.drc draco_file.open("GET", "http://jsrun.it/assets/k/Y/X/g/kYXge", true); // Itokawa Hayabusa 200k poly.drc draco_file.responseType = "arraybuffer"; draco_file.send(); draco_file.onload = function(e) { loadGeometry(draco_file.response); isDracoLoaded = true; } } function loadGeometry(raw_data) { const buffer = new DracoModule.DecoderBuffer(); let rawBuffer = raw_data; buffer.Init(new Int8Array(rawBuffer), rawBuffer.byteLength); const wrapper = new DracoModule.WebIDLWrapper(); /* * Determine what type is this file, mesh or point cloud. */ const geometryType = wrapper.GetEncodedGeometryType(buffer); if (geometryType == DracoModule.TRIANGULAR_MESH) { console.log("Loaded a mesh."); } else if (geometryType == DracoModule.POINT_CLOUD) { console.log("Loaded a point cloud."); } else { console.log("Error: Unknown geometry type."); } convertDracoGeometryTo3JS(wrapper, geometryType, buffer); } function convertDracoGeometryTo3JS(wrapper, geometryType, buffer) { let dracoGeometry; if (geometryType == DracoModule.TRIANGULAR_MESH) { dracoGeometry = wrapper.DecodeMeshFromBuffer(buffer); } else { dracoGeometry = wrapper.DecodePointCloudFromBuffer(buffer); } DracoModule.destroy(buffer); let numFaces, numPoints, numVertexCoordinates, numAttributes; // For output basic geometry information. let geometryInfoStr = ""; if (geometryType == DracoModule.TRIANGULAR_MESH) { numFaces = dracoGeometry.num_faces(); geometryInfoStr += "Number of faces loaded: " + numFaces.toString() + ".\n"; } else { numFaces = 0; } console.log(geometryInfoStr); numPoints = dracoGeometry.num_points(); count = numPoints; numVertexCoordinates = numPoints * 3; numAttributes = dracoGeometry.num_attributes(); geometryInfoStr = "Number of points loaded: " + numPoints.toString() + ".\n"; geometryInfoStr += "Number of attributes loaded: " + numAttributes.toString() + ".\n"; // Get position attribute. Must exists. const posAttId = wrapper.GetAttributeId(dracoGeometry, Module.POSITION); if (posAttId == -1) { const errorMsg = "No position attribute found in the mesh."; console.log(errorMsg); DracoModule.destroy(wrapper); DracoModule.destroy(dracoGeometry); throw new Error(errorMsg); } const posAttribute = wrapper.GetAttribute(dracoGeometry, posAttId); const posAttributeData = new DracoModule.DracoFloat32Array(); wrapper.GetAttributeFloatForAllPoints(dracoGeometry, posAttribute, posAttributeData); // Get color attributes if exists. const colorAttId = wrapper.GetAttributeId(dracoGeometry, Module.COLOR); let colAttributeData; if (colorAttId != -1) { geometryInfoStr += "\nLoaded color attribute.\n"; const colAttribute = wrapper.GetAttribute(dracoGeometry, colorAttId); colAttributeData = new DracoModule.DracoFloat32Array(); wrapper.GetAttributeFloatForAllPoints(dracoGeometry, colAttribute, colAttributeData); } // Get normal attributes if exists. const normalAttId = wrapper.GetAttributeId(dracoGeometry, Module.NORMAL); let norAttributeData; if (normalAttId != -1) { geometryInfoStr += "\nLoaded normal attribute.\n"; const norAttribute = wrapper.GetAttribute(dracoGeometry, normalAttId); norAttributeData = new DracoModule.DracoFloat32Array(); wrapper.GetAttributeFloatForAllPoints(dracoGeometry, norAttribute, norAttributeData); } console.log(geometryInfoStr); var positions = []; var normals = []; var colors = []; var indices = []; for (let i = 0; i < numVertexCoordinates; i += 3) { positions.push(posAttributeData.GetValue(i+0)); positions.push(posAttributeData.GetValue(i+1)); positions.push(posAttributeData.GetValue(i+2)); } DracoModule.destroy(posAttributeData); if (colorAttId != -1) DracoModule.destroy(colAttributeData); if (normalAttId != -1) DracoModule.destroy(norAttributeData); // For mesh, we need to generate the faces. if (geometryType == DracoModule.TRIANGULAR_MESH) { const numIndices = numFaces * 3; const ia = new DracoInt32Array(); for (let i = 0; i < numFaces; ++i) { wrapper.GetFaceFromMesh(dracoGeometry, i, ia); indices.push(ia.GetValue(0)); indices.push(ia.GetValue(1)); indices.push(ia.GetValue(2)); } DracoModule.destroy(ia); } DracoModule.destroy(wrapper); DracoModule.destroy(dracoGeometry); g_positions = new Float32Array(positions); g_indices = new Uint32Array(indices); }   <script src="https://unpkg.com/grimoirejs-preset-basic@1.8.6/register/grimoire-preset-basic.min.js"></script>  <script src="https://cdn.rawgit.com/google/draco/6114eed6/javascript/draco_decoder.js"></script> <div id="page-wrapper"> <p style="position:absolute; color: #fff;">Load Draco Mesh</p> <pre id="fileDisplayArea" style="display:none"><pre> </div> <script type="text/goml" id="canvas"> <goml width="fit" height="fit" bgColor="black"> <goml.components> </goml.components> <import-material typeName="flatShader" src="http://jsrun.it/assets/W/i/l/s/WilsP"/> <scene> <camera> <camera.components> </camera.components> </camera> <mesh material="new(flatShader)"/> </scene> </goml> </script> * { margin: 0; padding: 0; border: 0; } body { background: #fff; font: 30px sans-serif; overflow: hidden; }

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プログラマ（マイクロソフト系の言語を使用することが多いです。） JavaScript のライブラリを色々と試して遊んでます。

■ 各種 WebGL ライブラリによる基本サンプル一覧 http://qiita.com/cx20/items/0fa19c96aa6470d98807

■ 各種 WebGLライブラリと3D物理演算ライブラリの組み合わせ一覧 http://qiita.com/cx20/items/3ebed669fb9c9e797935

■ Grimoire.js サンプル一覧 http://jsdo.it/tag/Grimoire.js

■ GLBoost サンプル一覧 http://jsdo.it/tag/GLBoost

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[WebGL] Grimoire.js で Draco 形式のファイルを読み込んでみるテスト

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