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<h1 class="title">interaction.js Example File</h1>
<span class="subtitle">interaction/qml/interaction/interaction.js</span>
<!-- $$$interaction/qml/interaction/interaction.js-description -->
<div class="descr"> <a name="details"></a>
<pre class="js">
<span class="comment">/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCanvas3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="name">Qt</span>.<span class="name">include</span>(<span class="string">"gl-matrix.js"</span>)
<span class="name">Qt</span>.<span class="name">include</span>(<span class="string">"ThreeJSLoader.js"</span>)
var <span class="name">gl</span>;
var <span class="name">texturedShaderProgram</span> = <span class="number">0</span>;
var <span class="name">vertexShader</span> = <span class="number">0</span>;
var <span class="name">fragmentShader</span> = <span class="number">0</span>;
var <span class="name">vertexPositionAttribute</span>;
var <span class="name">textureCoordAttribute</span>;
var <span class="name">vertexNormalAttribute</span>;
var <span class="name">pMatrixUniform</span>;
var <span class="name">mvMatrixUniform</span>;
var <span class="name">nMatrixUniform</span>;
var <span class="name">textureSamplerUniform</span>;
var <span class="name">barrelTexture</span> = <span class="number">0</span>;
var <span class="name">mvMatrix</span> = <span class="name">mat4</span>.<span class="name">create</span>();
var <span class="name">pMatrix</span> = <span class="name">mat4</span>.<span class="name">create</span>();
var <span class="name">nMatrix</span> = <span class="name">mat4</span>.<span class="name">create</span>();
var <span class="name">startTime</span>;
var <span class="name">canvas3d</span>;
var <span class="name">isLogEnabled</span> = <span class="number">false</span>;
<span class="keyword">function</span> <span class="name">log</span>(<span class="name">message</span>) {
<span class="keyword">if</span> (<span class="name">isLogEnabled</span>)
<span class="name">console</span>.<span class="name">log</span>(<span class="name">message</span>)
}
<span class="keyword">function</span> <span class="name">Model</span>() {
this.<span class="name">verticesVBO</span> <span class="operator">=</span> <span class="number">0</span>;
this.<span class="name">normalsVBO</span> <span class="operator">=</span> <span class="number">0</span>;
this.<span class="name">texCoordVBO</span> <span class="operator">=</span> <span class="number">0</span>;
this.<span class="name">indexVBO</span> <span class="operator">=</span> <span class="number">0</span>;
this.<span class="name">count</span> <span class="operator">=</span> <span class="number">0</span>;
}
var <span class="name">theModel</span> = new <span class="name">Model</span>();
<span class="keyword">function</span> <span class="name">initializeGL</span>(<span class="name">canvas</span>) {
<span class="name">canvas3d</span> <span class="operator">=</span> <span class="name">canvas</span>
<span class="name">log</span>(<span class="string">"*******************************************************************************************"</span>)
<span class="name">log</span>(<span class="string">"initializeGL ENTER..."</span>)
<span class="keyword">try</span> {
<span class="name">startTime</span> <span class="operator">=</span> <span class="name">Date</span>.<span class="name">now</span>();
<span class="comment">// Get the OpenGL context jsonObj that represents the API we call</span>
<span class="name">log</span>(<span class="string">"Getting Context"</span>);
<span class="name">gl</span> <span class="operator">=</span> <span class="name">canvas</span>.<span class="name">getContext</span>(<span class="string">"canvas3d"</span>, {depth:<span class="number">true</span>, antialias:<span class="number">true</span>, alpha:<span class="number">false</span>});
<span class="name">log</span>(<span class="string">"Context received "</span><span class="operator">+</span><span class="name">gl</span>);
var <span class="name">contextConfig</span> = <span class="name">gl</span>.<span class="name">getContextAttributes</span>();
<span class="name">log</span>(<span class="string">"Depth: "</span><span class="operator">+</span><span class="name">contextConfig</span>.<span class="name">alpha</span>);
<span class="name">log</span>(<span class="string">"Stencil: "</span><span class="operator">+</span><span class="name">contextConfig</span>.<span class="name">stencil</span>);
<span class="name">log</span>(<span class="string">"Antialiasing: "</span><span class="operator">+</span><span class="name">contextConfig</span>.<span class="name">antialias</span>);
<span class="name">log</span>(<span class="string">"Premultiplied alpha: "</span><span class="operator">+</span><span class="name">contextConfig</span>.<span class="name">premultipliedAlpha</span>);
<span class="name">log</span>(<span class="string">"Preserve drawingbuffer: "</span><span class="operator">+</span><span class="name">contextConfig</span>.<span class="name">preserveDrawingBuffer</span>);
<span class="name">log</span>(<span class="string">"Prefer Low Power To High Performance: "</span><span class="operator">+</span><span class="name">contextConfig</span>.<span class="name">preferLowPowerToHighPerformance</span>);
<span class="name">log</span>(<span class="string">"Fail If Major Performance Caveat: "</span><span class="operator">+</span><span class="name">contextConfig</span>.<span class="name">failIfMajorPerformanceCaveat</span>);
<span class="comment">// Setup the OpenGL state</span>
<span class="name">gl</span>.<span class="name">enable</span>(<span class="name">gl</span>.<span class="name">DEPTH_TEST</span>);
<span class="name">gl</span>.<span class="name">enable</span>(<span class="name">gl</span>.<span class="name">CULL_FACE</span>);
<span class="name">gl</span>.<span class="name">frontFace</span>(<span class="name">gl</span>.<span class="name">CCW</span>);
<span class="name">gl</span>.<span class="name">cullFace</span>(<span class="name">gl</span>.<span class="name">BACK</span>);
<span class="name">gl</span>.<span class="name">disable</span>(<span class="name">gl</span>.<span class="name">BLEND</span>);
<span class="name">gl</span>.<span class="name">clearColor</span>(<span class="number">0.98</span>, <span class="number">0.98</span>, <span class="number">0.98</span>, <span class="number">1.0</span>);
<span class="name">gl</span>.<span class="name">clearDepth</span>(<span class="number">1.0</span>);
<span class="comment">// Set viewport</span>
<span class="name">gl</span>.<span class="name">viewport</span>(<span class="number">0</span>, <span class="number">0</span>,
<span class="name">canvas</span>.<span class="name">width</span> <span class="operator">*</span> <span class="name">canvas</span>.<span class="name">devicePixelRatio</span>,
<span class="name">canvas</span>.<span class="name">height</span> <span class="operator">*</span> <span class="name">canvas</span>.<span class="name">devicePixelRatio</span>);
<span class="comment">// Initialize the shader program</span>
<span class="name">initShaders</span>();
<span class="comment">// Initialize buffers</span>
<span class="name">theModel</span>.<span class="name">verticesVBO</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">createBuffer</span>();
<span class="name">theModel</span>.<span class="name">verticesVBO</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"BarrelModel.verticesVBO"</span>;
<span class="name">theModel</span>.<span class="name">normalsVBO</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">createBuffer</span>();
<span class="name">theModel</span>.<span class="name">normalsVBO</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"BarrelModel.normalsVBO"</span>;
<span class="name">theModel</span>.<span class="name">texCoordVBO</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">createBuffer</span>();
<span class="name">theModel</span>.<span class="name">texCoordVBO</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"BarrelModel.texCoordVBO"</span>;
<span class="name">theModel</span>.<span class="name">indexVBO</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">createBuffer</span>();
<span class="name">theModel</span>.<span class="name">indexVBO</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"BarrelModel.indexVBO"</span>;
<span class="comment">// Load the barrel texture</span>
<span class="name">gl</span>.<span class="name">pixelStorei</span>(<span class="name">gl</span>.<span class="name">UNPACK_FLIP_Y_WEBGL</span>, <span class="number">true</span>);
<span class="comment">// Load the Qt logo as texture</span>
var <span class="name">barrelImage</span> = <span class="name">TextureImageFactory</span>.<span class="name">newTexImage</span>();
<span class="name">barrelImage</span>.<span class="name">imageLoaded</span>.<span class="name">connect</span>(<span class="keyword">function</span>() {
<span class="name">barrelTexture</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">createTexture</span>();
<span class="name">barrelTexture</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"barrelTexture"</span>
<span class="name">gl</span>.<span class="name">bindTexture</span>(<span class="name">gl</span>.<span class="name">TEXTURE_2D</span>, <span class="name">barrelTexture</span>);
<span class="name">gl</span>.<span class="name">texImage2D</span>(<span class="name">gl</span>.<span class="name">TEXTURE_2D</span>, <span class="comment">// target</span>
<span class="number">0</span>, <span class="comment">// level</span>
<span class="name">gl</span>.<span class="name">RGBA</span>, <span class="comment">// internalformat</span>
<span class="name">gl</span>.<span class="name">RGBA</span>, <span class="comment">// format</span>
<span class="name">gl</span>.<span class="name">UNSIGNED_BYTE</span>, <span class="comment">// type</span>
<span class="name">barrelImage</span>); <span class="comment">// pixels</span>
<span class="name">gl</span>.<span class="name">texParameteri</span>(<span class="name">gl</span>.<span class="name">TEXTURE_2D</span>, <span class="name">gl</span>.<span class="name">TEXTURE_MAG_FILTER</span>, <span class="name">gl</span>.<span class="name">LINEAR</span>);
<span class="name">gl</span>.<span class="name">texParameteri</span>(<span class="name">gl</span>.<span class="name">TEXTURE_2D</span>, <span class="name">gl</span>.<span class="name">TEXTURE_MIN_FILTER</span>, <span class="name">gl</span>.<span class="name">LINEAR_MIPMAP_NEAREST</span>);
<span class="name">gl</span>.<span class="name">generateMipmap</span>(<span class="name">gl</span>.<span class="name">TEXTURE_2D</span>);
});
<span class="name">barrelImage</span>.<span class="name">imageLoadingFailed</span>.<span class="name">connect</span>(<span class="keyword">function</span>() {
<span class="name">console</span>.<span class="name">log</span>(<span class="string">"Texture load FAILED, "</span><span class="operator">+</span><span class="name">barrelImage</span>.<span class="name">errorString</span>);
});
<span class="comment">// Aliasing doesn't work correctly with QtQuick compiler for some reason,</span>
<span class="comment">// so use full names for barrel.jpg and barrel.json</span>
<span class="name">barrelImage</span>.<span class="name">src</span> <span class="operator">=</span> <span class="string">"qrc:/qml/interaction/barrel.jpg"</span>;
<span class="comment">// Load the model</span>
<span class="name">log</span>(<span class="string">" Create XMLHttpRequest"</span>)
var <span class="name">request</span> = new <span class="name">XMLHttpRequest</span>();
<span class="name">log</span>(<span class="string">" XMLHttpRequest.open"</span>)
<span class="name">request</span>.<span class="name">open</span>(<span class="string">"GET"</span>, <span class="string">"qrc:/qml/interaction/barrel.json"</span>);
<span class="name">log</span>(<span class="string">" XMLHttpRequest.onreadystatechange"</span>)
<span class="name">request</span>.<span class="name">onreadystatechange</span> <span class="operator">=</span> <span class="keyword">function</span> () {
<span class="keyword">if</span> (<span class="name">request</span>.<span class="name">readyState</span> <span class="operator">===</span> <span class="name">XMLHttpRequest</span>.<span class="name">DONE</span>) {
<span class="name">handleLoadedModel</span>(<span class="name">JSON</span>.<span class="name">parse</span>(<span class="name">request</span>.<span class="name">responseText</span>));
}
}
<span class="name">log</span>(<span class="string">" XMLHttpRequest.send"</span>)
<span class="name">request</span>.<span class="name">send</span>();
<span class="name">log</span>(<span class="string">"...initializeGL EXIT"</span>);
} <span class="keyword">catch</span>(<span class="name">e</span>) {
console.log("...initializeGL FAILURE!");
console.log(""+e);
console.log(""+e.message);
}
<span class="name">log</span>(<span class="string">"*******************************************************************************************"</span>);
}
<span class="keyword">function</span> <span class="name">resizeGL</span>(<span class="name">canvas</span>)
{
var <span class="name">pixelRatio</span> = <span class="name">canvas</span>.<span class="name">devicePixelRatio</span>;
<span class="name">canvas</span>.<span class="name">pixelSize</span> <span class="operator">=</span> <span class="name">Qt</span>.<span class="name">size</span>(<span class="name">canvas</span>.<span class="name">width</span> <span class="operator">*</span> <span class="name">pixelRatio</span>,
<span class="name">canvas</span>.<span class="name">height</span> <span class="operator">*</span> <span class="name">pixelRatio</span>);
<span class="keyword">if</span> (<span class="name">gl</span>)
<span class="name">gl</span>.<span class="name">viewport</span>(<span class="number">0</span>, <span class="number">0</span>,
<span class="name">canvas</span>.<span class="name">width</span> <span class="operator">*</span> <span class="name">canvas</span>.<span class="name">devicePixelRatio</span>,
<span class="name">canvas</span>.<span class="name">height</span> <span class="operator">*</span> <span class="name">canvas</span>.<span class="name">devicePixelRatio</span>);
}
<span class="keyword">function</span> <span class="name">paintGL</span>(<span class="name">canvas</span>) {
<span class="comment">// draw</span>
<span class="name">gl</span>.<span class="name">clear</span>(<span class="name">gl</span>.<span class="name">COLOR_BUFFER_BIT</span> <span class="operator">|</span> <span class="name">gl</span>.<span class="name">DEPTH_BUFFER_BIT</span>);
<span class="comment">// draw only when we have the mesh and texture</span>
<span class="keyword">if</span> (<span class="name">theModel</span>.<span class="name">count</span> <span class="operator"><=</span> <span class="number">0</span> <span class="operator">||</span> <span class="name">barrelTexture</span> <span class="operator">==</span> <span class="number">0</span>) <span class="keyword">return</span>;
<span class="name">gl</span>.<span class="name">useProgram</span>(<span class="name">texturedShaderProgram</span>);
<span class="comment">// Calculate the perspective projection</span>
<span class="name">mat4</span>.<span class="name">perspective</span>(<span class="name">pMatrix</span>, <span class="name">degToRad</span>(<span class="number">45</span>), <span class="name">canvas</span>.<span class="name">width</span> <span class="operator">/</span> <span class="name">canvas</span>.<span class="name">height</span>, <span class="number">0.1</span>, <span class="number">10000.0</span>);
<span class="name">gl</span>.<span class="name">uniformMatrix4fv</span>(<span class="name">pMatrixUniform</span>, <span class="number">false</span>, <span class="name">pMatrix</span>);
<span class="comment">// Bind the correct buffers</span>
<span class="name">gl</span>.<span class="name">bindBuffer</span>(<span class="name">gl</span>.<span class="name">ARRAY_BUFFER</span>, <span class="name">theModel</span>.<span class="name">verticesVBO</span>);
<span class="name">gl</span>.<span class="name">enableVertexAttribArray</span>(<span class="name">vertexPositionAttribute</span>);
<span class="name">gl</span>.<span class="name">vertexAttribPointer</span>(<span class="name">vertexPositionAttribute</span>, <span class="number">3</span>, <span class="name">gl</span>.<span class="name">FLOAT</span>, <span class="number">false</span>, <span class="number">0</span>, <span class="number">0</span>);
<span class="name">gl</span>.<span class="name">bindBuffer</span>(<span class="name">gl</span>.<span class="name">ARRAY_BUFFER</span>, <span class="name">theModel</span>.<span class="name">normalsVBO</span>);
<span class="name">gl</span>.<span class="name">enableVertexAttribArray</span>(<span class="name">vertexNormalAttribute</span>);
<span class="name">gl</span>.<span class="name">vertexAttribPointer</span>(<span class="name">vertexNormalAttribute</span>, <span class="number">3</span>, <span class="name">gl</span>.<span class="name">FLOAT</span>, <span class="number">false</span>, <span class="number">0</span>, <span class="number">0</span>);
<span class="name">gl</span>.<span class="name">bindBuffer</span>(<span class="name">gl</span>.<span class="name">ARRAY_BUFFER</span>, <span class="name">theModel</span>.<span class="name">texCoordVBO</span>);
<span class="name">gl</span>.<span class="name">enableVertexAttribArray</span>(<span class="name">textureCoordAttribute</span>);
<span class="name">gl</span>.<span class="name">vertexAttribPointer</span>(<span class="name">textureCoordAttribute</span>, <span class="number">2</span>, <span class="name">gl</span>.<span class="name">FLOAT</span>, <span class="number">false</span>, <span class="number">0</span>, <span class="number">0</span>);
<span class="name">gl</span>.<span class="name">activeTexture</span>(<span class="name">gl</span>.<span class="name">TEXTURE0</span>);
<span class="name">gl</span>.<span class="name">bindTexture</span>(<span class="name">gl</span>.<span class="name">TEXTURE_2D</span>, <span class="name">barrelTexture</span>);
<span class="name">gl</span>.<span class="name">uniform1i</span>(<span class="name">textureSamplerUniform</span>, <span class="number">0</span>);
<span class="comment">// Calculate and apply the modelview matrix</span>
<span class="name">mvMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">identity</span>(<span class="name">mvMatrix</span>);
<span class="name">mvMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">translate</span>(<span class="name">mvMatrix</span>, <span class="name">mvMatrix</span>, [<span class="number">0</span>, -<span class="number">40</span>, -<span class="number">700</span>]);
<span class="name">mvMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">rotate</span>(<span class="name">mvMatrix</span>, <span class="name">mvMatrix</span>, <span class="name">degToRad</span>(<span class="name">canvas</span>.<span class="name">xRotSlider</span>), [<span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>]);
<span class="name">mvMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">rotate</span>(<span class="name">mvMatrix</span>, <span class="name">mvMatrix</span>, <span class="name">degToRad</span>(<span class="name">canvas</span>.<span class="name">yRotSlider</span>), [<span class="number">0</span>, <span class="number">1</span>, <span class="number">0</span>]);
<span class="name">mvMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">rotate</span>(<span class="name">mvMatrix</span>, <span class="name">mvMatrix</span>, <span class="name">degToRad</span>(<span class="name">canvas</span>.<span class="name">zRotSlider</span>), [<span class="number">0</span>, <span class="number">0</span>, <span class="number">1</span>]);
<span class="name">gl</span>.<span class="name">uniformMatrix4fv</span>(<span class="name">mvMatrixUniform</span>, <span class="number">false</span>, <span class="name">mvMatrix</span>);
<span class="comment">// Calculate normal matrix</span>
<span class="name">nMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">invert</span>(<span class="name">nMatrix</span>, <span class="name">mvMatrix</span>);
<span class="name">nMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">transpose</span>(<span class="name">nMatrix</span>, <span class="name">nMatrix</span>);
<span class="name">gl</span>.<span class="name">uniformMatrix4fv</span>(<span class="name">nMatrixUniform</span>, <span class="number">false</span>, <span class="name">nMatrix</span>);
<span class="comment">// Draw the barrel</span>
<span class="name">gl</span>.<span class="name">bindBuffer</span>(<span class="name">gl</span>.<span class="name">ELEMENT_ARRAY_BUFFER</span>, <span class="name">theModel</span>.<span class="name">indexVBO</span>);
<span class="name">gl</span>.<span class="name">drawElements</span>(<span class="name">gl</span>.<span class="name">TRIANGLES</span>, <span class="name">theModel</span>.<span class="name">count</span>, <span class="name">gl</span>.<span class="name">UNSIGNED_SHORT</span>, <span class="number">0</span>);
<span class="comment">// Calculate and apply the modelview matrix</span>
<span class="name">mvMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">identity</span>(<span class="name">mvMatrix</span>);
<span class="name">mvMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">translate</span>(<span class="name">mvMatrix</span>, <span class="name">mvMatrix</span>, [-<span class="number">250</span>, -<span class="number">50</span>, -<span class="number">700</span>]);
<span class="name">mvMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">rotate</span>(<span class="name">mvMatrix</span>, <span class="name">mvMatrix</span>, <span class="name">degToRad</span>(<span class="name">canvas</span>.<span class="name">xRotSlider</span>), [<span class="number">0</span>, <span class="number">1</span>, <span class="number">0</span>]);
<span class="name">gl</span>.<span class="name">uniformMatrix4fv</span>(<span class="name">mvMatrixUniform</span>, <span class="number">false</span>, <span class="name">mvMatrix</span>);
<span class="comment">// Calculate normal matrix</span>
<span class="name">nMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">invert</span>(<span class="name">nMatrix</span>, <span class="name">mvMatrix</span>);
<span class="name">nMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">transpose</span>(<span class="name">nMatrix</span>, <span class="name">nMatrix</span>);
<span class="name">gl</span>.<span class="name">uniformMatrix4fv</span>(<span class="name">nMatrixUniform</span>, <span class="number">false</span>, <span class="name">nMatrix</span>);
<span class="comment">// Draw the barrel</span>
<span class="name">gl</span>.<span class="name">bindBuffer</span>(<span class="name">gl</span>.<span class="name">ELEMENT_ARRAY_BUFFER</span>, <span class="name">theModel</span>.<span class="name">indexVBO</span>);
<span class="name">gl</span>.<span class="name">drawElements</span>(<span class="name">gl</span>.<span class="name">POINTS</span>, <span class="name">theModel</span>.<span class="name">count</span>, <span class="name">gl</span>.<span class="name">UNSIGNED_SHORT</span>, <span class="number">0</span>);
<span class="comment">// Calculate and apply the modelview matrix</span>
<span class="name">mvMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">identity</span>(<span class="name">mvMatrix</span>);
<span class="name">mvMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">translate</span>(<span class="name">mvMatrix</span>, <span class="name">mvMatrix</span>, [<span class="number">250</span>, -<span class="number">50</span>, -<span class="number">700</span>]);
<span class="name">mvMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">rotate</span>(<span class="name">mvMatrix</span>, <span class="name">mvMatrix</span>, <span class="name">degToRad</span>(<span class="name">canvas</span>.<span class="name">zRotSlider</span>), [<span class="number">0</span>, <span class="number">1</span>, <span class="number">0</span>]);
<span class="name">gl</span>.<span class="name">uniformMatrix4fv</span>(<span class="name">mvMatrixUniform</span>, <span class="number">false</span>, <span class="name">mvMatrix</span>);
<span class="comment">// Calculate normal matrix</span>
<span class="name">nMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">invert</span>(<span class="name">nMatrix</span>, <span class="name">mvMatrix</span>);
<span class="name">nMatrix</span> <span class="operator">=</span> <span class="name">mat4</span>.<span class="name">transpose</span>(<span class="name">nMatrix</span>, <span class="name">nMatrix</span>);
<span class="name">gl</span>.<span class="name">uniformMatrix4fv</span>(<span class="name">nMatrixUniform</span>, <span class="number">false</span>, <span class="name">nMatrix</span>);
<span class="comment">// Draw the barrel</span>
<span class="name">gl</span>.<span class="name">bindBuffer</span>(<span class="name">gl</span>.<span class="name">ELEMENT_ARRAY_BUFFER</span>, <span class="name">theModel</span>.<span class="name">indexVBO</span>);
<span class="name">gl</span>.<span class="name">drawElements</span>(<span class="name">gl</span>.<span class="name">LINES</span>, <span class="name">theModel</span>.<span class="name">count</span>, <span class="name">gl</span>.<span class="name">UNSIGNED_SHORT</span>, <span class="number">0</span>);
}
<span class="keyword">function</span> <span class="name">handleLoadedModel</span>(<span class="name">jsonObj</span>) {
<span class="name">log</span>(<span class="string">"*******************************************************************************************"</span>);
<span class="name">log</span>(<span class="string">"handleLoadedModel ENTER..."</span>)
var <span class="name">modelData</span> = <span class="name">parseJSON3DModel</span>(<span class="name">jsonObj</span>, <span class="string">""</span>);
<span class="name">log</span>(<span class="string">" "</span><span class="operator">+</span><span class="name">theModel</span>.<span class="name">verticesVBO</span>);
<span class="name">gl</span>.<span class="name">bindBuffer</span>(<span class="name">gl</span>.<span class="name">ARRAY_BUFFER</span>, <span class="name">theModel</span>.<span class="name">verticesVBO</span>);
<span class="name">gl</span>.<span class="name">bufferData</span>(<span class="name">gl</span>.<span class="name">ARRAY_BUFFER</span>,
new <span class="name">Float32Array</span>(<span class="name">modelData</span>.<span class="name">vertices</span>),
<span class="name">gl</span>.<span class="name">STATIC_DRAW</span>);
<span class="name">log</span>(<span class="string">" "</span><span class="operator">+</span><span class="name">theModel</span>.<span class="name">normalsVBO</span>);
<span class="name">gl</span>.<span class="name">bindBuffer</span>(<span class="name">gl</span>.<span class="name">ARRAY_BUFFER</span>, <span class="name">theModel</span>.<span class="name">normalsVBO</span>);
<span class="name">gl</span>.<span class="name">bufferData</span>(<span class="name">gl</span>.<span class="name">ARRAY_BUFFER</span>,
new <span class="name">Float32Array</span>(<span class="name">modelData</span>.<span class="name">normals</span>),
<span class="name">gl</span>.<span class="name">STATIC_DRAW</span>);
<span class="name">log</span>(<span class="string">" "</span><span class="operator">+</span><span class="name">theModel</span>.<span class="name">texCoordVBO</span>);
<span class="name">gl</span>.<span class="name">bindBuffer</span>(<span class="name">gl</span>.<span class="name">ARRAY_BUFFER</span>, <span class="name">theModel</span>.<span class="name">texCoordVBO</span>);
<span class="name">gl</span>.<span class="name">bufferData</span>(<span class="name">gl</span>.<span class="name">ARRAY_BUFFER</span>,
new <span class="name">Float32Array</span>(<span class="name">modelData</span>.<span class="name">texCoords</span>[<span class="number">0</span>]),
<span class="name">gl</span>.<span class="name">STATIC_DRAW</span>);
<span class="name">log</span>(<span class="string">" "</span><span class="operator">+</span><span class="name">theModel</span>.<span class="name">indexVBO</span>);
<span class="name">gl</span>.<span class="name">bindBuffer</span>(<span class="name">gl</span>.<span class="name">ELEMENT_ARRAY_BUFFER</span>, <span class="name">theModel</span>.<span class="name">indexVBO</span>);
<span class="name">gl</span>.<span class="name">bufferData</span>(<span class="name">gl</span>.<span class="name">ELEMENT_ARRAY_BUFFER</span>,
new <span class="name">Uint16Array</span>(<span class="name">modelData</span>.<span class="name">indices</span>),
<span class="name">gl</span>.<span class="name">STATIC_DRAW</span>);
<span class="name">theModel</span>.<span class="name">count</span> <span class="operator">=</span> <span class="name">modelData</span>.<span class="name">indices</span>.<span class="name">length</span>;
<span class="name">log</span>(<span class="string">"...handleLoadedModel EXIT"</span>);
<span class="name">log</span>(<span class="string">"*******************************************************************************************"</span>);
}
<span class="keyword">function</span> <span class="name">degToRad</span>(<span class="name">degrees</span>) {
<span class="keyword">return</span> <span class="name">degrees</span> <span class="operator">*</span> <span class="name">Math</span>.<span class="name">PI</span> <span class="operator">/</span> <span class="number">180</span>;
}
<span class="keyword">function</span> <span class="name">initShaders</span>()
{
<span class="name">log</span>(<span class="string">" initShaders ENTER..."</span>)
<span class="name">vertexShader</span> <span class="operator">=</span> <span class="name">getShader</span>(<span class="name">gl</span>,
<span class="string">"attribute highp vec3 aVertexNormal; \
attribute highp vec3 aVertexPosition; \
attribute highp vec2 aTextureCoord; \
\
uniform highp mat4 uNormalMatrix; \
uniform mat4 uMVMatrix; \
uniform mat4 uPMatrix; \
\
varying highp vec2 vTextureCoord; \
varying highp vec3 vLighting; \
\
void main(void) { \
gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0); \
vTextureCoord = aTextureCoord; \
highp vec3 ambientLight = vec3(0.5, 0.5, 0.5); \
highp vec3 directionalLightColor = vec3(0.75, 0.75, 0.75); \
highp vec3 directionalVector = vec3(0.85, 0.8, 0.75); \
highp vec4 transformedNormal = uNormalMatrix * vec4(aVertexNormal, 1.0); \
\
highp float directional = max(dot(transformedNormal.xyz, directionalVector), 0.0); \
vLighting = ambientLight + (directionalLightColor * directional); \
gl_PointSize = 1.0; \
}"</span>, <span class="name">gl</span>.<span class="name">VERTEX_SHADER</span>);
<span class="name">fragmentShader</span> <span class="operator">=</span> <span class="name">getShader</span>(<span class="name">gl</span>,
<span class="string">"varying highp vec2 vTextureCoord; \
varying highp vec3 vLighting; \
\
uniform sampler2D uSampler; \
\
void main(void) { \
mediump vec4 texelColor = texture2D(uSampler, vec2(vTextureCoord.s, vTextureCoord.t)); \
gl_FragColor = vec4(texelColor.rgb * vLighting, 1.0); \
}"</span>, <span class="name">gl</span>.<span class="name">FRAGMENT_SHADER</span>);
<span class="name">texturedShaderProgram</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">createProgram</span>();
<span class="name">texturedShaderProgram</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"TexturedShaderProgram"</span>;
<span class="name">gl</span>.<span class="name">attachShader</span>(<span class="name">texturedShaderProgram</span>, <span class="name">vertexShader</span>);
<span class="name">gl</span>.<span class="name">attachShader</span>(<span class="name">texturedShaderProgram</span>, <span class="name">fragmentShader</span>);
<span class="name">gl</span>.<span class="name">linkProgram</span>(<span class="name">texturedShaderProgram</span>);
<span class="keyword">if</span> (!<span class="name">gl</span>.<span class="name">getProgramParameter</span>(<span class="name">texturedShaderProgram</span>, <span class="name">gl</span>.<span class="name">LINK_STATUS</span>)) {
<span class="name">console</span>.<span class="name">log</span>(<span class="string">"Could not initialize shaders"</span>);
<span class="name">console</span>.<span class="name">log</span>(<span class="name">gl</span>.<span class="name">getProgramInfoLog</span>(<span class="name">texturedShaderProgram</span>));
}
<span class="name">gl</span>.<span class="name">useProgram</span>(<span class="name">texturedShaderProgram</span>);
<span class="comment">// look up where the vertex data needs to go.</span>
<span class="name">vertexPositionAttribute</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getAttribLocation</span>(<span class="name">texturedShaderProgram</span>, <span class="string">"aVertexPosition"</span>);
<span class="name">vertexPositionAttribute</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"aVertexPosition_AttribLocation"</span>;
<span class="name">gl</span>.<span class="name">enableVertexAttribArray</span>(<span class="name">vertexPositionAttribute</span>);
<span class="name">vertexNormalAttribute</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getAttribLocation</span>(<span class="name">texturedShaderProgram</span>, <span class="string">"aVertexNormal"</span>);
<span class="name">vertexPositionAttribute</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"aVertexNormal_AttribLocation"</span>;
<span class="name">gl</span>.<span class="name">enableVertexAttribArray</span>(<span class="name">vertexNormalAttribute</span>);
<span class="name">textureCoordAttribute</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getAttribLocation</span>(<span class="name">texturedShaderProgram</span>, <span class="string">"aTextureCoord"</span>);
<span class="name">vertexPositionAttribute</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"aTextureCoord_AttribLocation"</span>;
<span class="name">gl</span>.<span class="name">enableVertexAttribArray</span>(<span class="name">textureCoordAttribute</span>);
<span class="name">pMatrixUniform</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getUniformLocation</span>(<span class="name">texturedShaderProgram</span>, <span class="string">"uPMatrix"</span>);
<span class="name">pMatrixUniform</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"uPMatrix_UniformLocation"</span>;
<span class="name">mvMatrixUniform</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getUniformLocation</span>(<span class="name">texturedShaderProgram</span>, <span class="string">"uMVMatrix"</span>);
<span class="name">mvMatrixUniform</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"uMVMatrix_UniformLocation"</span>;
<span class="name">textureSamplerUniform</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getUniformLocation</span>(<span class="name">texturedShaderProgram</span>, <span class="string">"uSampler"</span>)
<span class="name">textureSamplerUniform</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"uSampler_UniformLocation"</span>;
<span class="name">nMatrixUniform</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getUniformLocation</span>(<span class="name">texturedShaderProgram</span>, <span class="string">"uNormalMatrix"</span>);
<span class="name">nMatrixUniform</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"uNormalMatrix_UniformLocation"</span>;
<span class="name">log</span>(<span class="string">" ... initShaders EXIT"</span>);
}
<span class="keyword">function</span> <span class="name">getShader</span>(<span class="name">gl</span>, str, type) {
var <span class="name">shader</span> = <span class="name">gl</span>.<span class="name">createShader</span>(<span class="name">type</span>);
<span class="name">gl</span>.<span class="name">shaderSource</span>(<span class="name">shader</span>, <span class="name">str</span>);
<span class="name">gl</span>.<span class="name">compileShader</span>(<span class="name">shader</span>);
<span class="keyword">if</span> (!<span class="name">gl</span>.<span class="name">getShaderParameter</span>(<span class="name">shader</span>, <span class="name">gl</span>.<span class="name">COMPILE_STATUS</span>)) {
<span class="name">console</span>.<span class="name">log</span>(<span class="string">"JS:Shader compile failed"</span>);
<span class="name">console</span>.<span class="name">log</span>(<span class="name">gl</span>.<span class="name">getShaderInfoLog</span>(<span class="name">shader</span>));
<span class="keyword">return</span> <span class="number">null</span>;
}
<span class="keyword">return</span> <span class="name">shader</span>;
}
</pre>
</div>
<!-- @@@interaction/qml/interaction/interaction.js -->
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<p>
<acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd.
Documentation contributions included herein are the copyrights of
their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property
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distrib
>
Mageia
>
6
>
x86_64
>
media
>
core-updates
>
by-pkgid
>
7672afc6a1c5f1f7ad2bfb0b950f0236
>
files
>
125
