<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>quickitemtexture.js Example File | Qt Canvas 3D 5.9</title>
<link rel="stylesheet" type="text/css" href="style/offline-simple.css" />
<script type="text/javascript">
document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css");
// loading style sheet breaks anchors that were jumped to before
// so force jumping to anchor again
setTimeout(function() {
var anchor = location.hash;
// need to jump to different anchor first (e.g. none)
location.hash = "#";
setTimeout(function() {
location.hash = anchor;
}, 0);
}, 0);
</script>
</head>
<body>
<div class="header" id="qtdocheader">
<div class="main">
<div class="main-rounded">
<div class="navigationbar">
<table><tr>
<td >Qt 5.9</td><td ><a href="qtcanvas3d-index.html">Qt Canvas 3D</a></td><td ><a href="qtcanvas3d-quickitemtexture-example.html">Qt Quick Item as Texture Example</a></td><td >quickitemtexture.js Example File</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
</tr></table>
</div>
</div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">quickitemtexture.js Example File</h1>
<span class="subtitle">quickitemtexture/qml/quickitemtexture/quickitemtexture.js</span>
<!-- $$$quickitemtexture/qml/quickitemtexture/quickitemtexture.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,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** 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="comment">// Draws a cube that has a Qt Quick item as decal texture on each face.</span>
<span class="comment">// A simple per vertex lighting equation is used to emulate light landing on the rotating cube.</span>
//
var <span class="name">gl</span>;
var <span class="name">cubeTexture</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">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">pMatrixUniform</span>;
var <span class="name">mvMatrixUniform</span>;
var <span class="name">nUniform</span>;
var <span class="name">width</span> = <span class="number">0</span>;
var <span class="name">height</span> = <span class="number">0</span>;
var <span class="name">canvas3d</span>;
var <span class="name">pixelSize</span>;
var <span class="name">canvasTextureProvider</span> = <span class="number">null</span>;
var <span class="name">textureSourceItem</span> = <span class="number">null</span>;
<span class="keyword">function</span> <span class="name">initializeGL</span>(<span class="name">canvas</span>, textureSource) {
<span class="name">canvas3d</span> <span class="operator">=</span> <span class="name">canvas</span>;
<span class="name">textureSourceItem</span> <span class="operator">=</span> <span class="name">textureSource</span>;
<span class="comment">// Get the OpenGL context object that represents the API we call</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>});
<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">depthFunc</span>(<span class="name">gl</span>.<span class="name">LESS</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">cullFace</span>(<span class="name">gl</span>.<span class="name">BACK</span>);
<span class="name">gl</span>.<span class="name">clearDepth</span>(<span class="number">1.0</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">false</span>);
<span class="comment">// Use fully transparent clear color to allow other QML components to be seen through</span>
<span class="comment">// Canvas3D where not obscured by the rotating cube.</span>
<span class="name">gl</span>.<span class="name">clearColor</span>(<span class="number">0.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>, <span class="number">0.0</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="name">canvas</span>.<span class="name">height</span>);
<span class="comment">// Initialize the shader program</span>
<span class="name">initShaders</span>();
<span class="comment">// Initialize vertex and color buffers</span>
<span class="name">initBuffers</span>();
<span class="comment">// Create a texture from the Qt Quick item</span>
<span class="name">canvasTextureProvider</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getExtension</span>(<span class="string">"QTCANVAS3D_texture_provider"</span>);
<span class="name">cubeTexture</span> <span class="operator">=</span> <span class="name">canvasTextureProvider</span>.<span class="name">createTextureFromSource</span>(<span class="name">textureSourceItem</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">cubeTexture</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">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">paintGL</span>(<span class="name">canvas</span>) {
var <span class="name">pixelRatio</span> = <span class="name">canvas</span>.<span class="name">devicePixelRatio</span>;
var <span class="name">currentWidth</span> = <span class="name">canvas</span>.<span class="name">width</span> <span class="operator">*</span> <span class="name">pixelRatio</span>;
var <span class="name">currentHeight</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">currentWidth</span> <span class="operator">!==</span> <span class="name">width</span> <span class="operator">||</span> <span class="name">currentHeight</span> <span class="operator">!==</span> <span class="name">height</span> ) {
<span class="name">width</span> <span class="operator">=</span> <span class="name">currentWidth</span>;
<span class="name">height</span> <span class="operator">=</span> <span class="name">currentHeight</span>;
<span class="name">gl</span>.<span class="name">viewport</span>(<span class="number">0</span>, <span class="number">0</span>, <span class="name">width</span>, <span class="name">height</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">width</span> <span class="operator">/</span> <span class="name">height</span>, <span class="number">0.1</span>, <span class="number">500.0</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="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="name">mat4</span>.<span class="name">identity</span>(<span class="name">mvMatrix</span>);
<span class="name">mat4</span>.<span class="name">translate</span>(<span class="name">mvMatrix</span>, <span class="name">mvMatrix</span>, [(<span class="name">canvas</span>.<span class="name">yRotAnim</span> <span class="operator">-</span> <span class="number">120.0</span>) <span class="operator">/</span> <span class="number">120.0</span>,
(<span class="name">canvas</span>.<span class="name">xRotAnim</span> <span class="operator">-</span> <span class="number">60.0</span>) <span class="operator">/</span> <span class="number">50.0</span>,
-<span class="number">7.0</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">xRotAnim</span>), [<span class="number">0</span>, <span class="number">1</span>, <span class="number">0</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">yRotAnim</span>), [<span class="number">1</span>, <span class="number">0</span>, <span class="number">0</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">zRotAnim</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="name">mat4</span>.<span class="name">invert</span>(<span class="name">nMatrix</span>, <span class="name">mvMatrix</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">nUniform</span>, <span class="number">false</span>, <span class="name">nMatrix</span>);
<span class="name">gl</span>.<span class="name">drawElements</span>(<span class="name">gl</span>.<span class="name">TRIANGLES</span>, <span class="number">36</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">initBuffers</span>()
{
var <span class="name">cubeVertexPositionBuffer</span> = <span class="name">gl</span>.<span class="name">createBuffer</span>();
<span class="name">cubeVertexPositionBuffer</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"cubeVertexPositionBuffer"</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">cubeVertexPositionBuffer</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="comment">// Front face</span>
-<span class="number">1.0</span>, -<span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="number">1.0</span>, -<span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</span>, <span class="number">1.0</span>,
-<span class="number">1.0</span>, <span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="comment">// Back face</span>
-<span class="number">1.0</span>, -<span class="number">1.0</span>, -<span class="number">1.0</span>,
-<span class="number">1.0</span>, <span class="number">1.0</span>, -<span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</span>, -<span class="number">1.0</span>,
<span class="number">1.0</span>, -<span class="number">1.0</span>, -<span class="number">1.0</span>,
<span class="comment">// Top face</span>
-<span class="number">1.0</span>, <span class="number">1.0</span>, -<span class="number">1.0</span>,
-<span class="number">1.0</span>, <span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</span>, -<span class="number">1.0</span>,
<span class="comment">// Bottom face</span>
-<span class="number">1.0</span>, -<span class="number">1.0</span>, -<span class="number">1.0</span>,
<span class="number">1.0</span>, -<span class="number">1.0</span>, -<span class="number">1.0</span>,
<span class="number">1.0</span>, -<span class="number">1.0</span>, <span class="number">1.0</span>,
-<span class="number">1.0</span>, -<span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="comment">// Right face</span>
<span class="number">1.0</span>, -<span class="number">1.0</span>, -<span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</span>, -<span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="number">1.0</span>, -<span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="comment">// Left face</span>
-<span class="number">1.0</span>, -<span class="number">1.0</span>, -<span class="number">1.0</span>,
-<span class="number">1.0</span>, -<span class="number">1.0</span>, <span class="number">1.0</span>,
-<span class="number">1.0</span>, <span class="number">1.0</span>, <span class="number">1.0</span>,
-<span class="number">1.0</span>, <span class="number">1.0</span>, -<span class="number">1.0</span>
]),
<span class="name">gl</span>.<span class="name">STATIC_DRAW</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>);
var <span class="name">cubeVertexIndexBuffer</span> = <span class="name">gl</span>.<span class="name">createBuffer</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">cubeVertexIndexBuffer</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="number">0</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">0</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="comment">// front</span>
<span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>, <span class="number">4</span>, <span class="number">6</span>, <span class="number">7</span>, <span class="comment">// back</span>
<span class="number">8</span>, <span class="number">9</span>, <span class="number">10</span>, <span class="number">8</span>, <span class="number">10</span>, <span class="number">11</span>, <span class="comment">// top</span>
<span class="number">12</span>, <span class="number">13</span>, <span class="number">14</span>, <span class="number">12</span>, <span class="number">14</span>, <span class="number">15</span>, <span class="comment">// bottom</span>
<span class="number">16</span>, <span class="number">17</span>, <span class="number">18</span>, <span class="number">16</span>, <span class="number">18</span>, <span class="number">19</span>, <span class="comment">// right</span>
<span class="number">20</span>, <span class="number">21</span>, <span class="number">22</span>, <span class="number">20</span>, <span class="number">22</span>, <span class="number">23</span> <span class="comment">// left</span>
]),
<span class="name">gl</span>.<span class="name">STATIC_DRAW</span>);
var <span class="name">cubeVerticesTextureCoordBuffer</span> = <span class="name">gl</span>.<span class="name">createBuffer</span>();
<span class="name">cubeVerticesTextureCoordBuffer</span>.<span class="name">name</span> <span class="operator">=</span> <span class="string">"cubeVerticesTextureCoordBuffer"</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">cubeVerticesTextureCoordBuffer</span>);
var <span class="name">textureCoordinates</span> = [
<span class="comment">// Front</span>
<span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="comment">// Back</span>
<span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="comment">// Top</span>
<span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="comment">// Bottom</span>
<span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="comment">// Right</span>
<span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</span>,
<span class="comment">// Left</span>
<span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">1.0</span>,
<span class="number">1.0</span>, <span class="number">1.0</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">textureCoordinates</span>),
<span class="name">gl</span>.<span class="name">STATIC_DRAW</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>);
var <span class="name">cubeVerticesNormalBuffer</span> = <span class="name">gl</span>.<span class="name">createBuffer</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">cubeVerticesNormalBuffer</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="comment">// Front</span>
<span class="number">0.0</span>, <span class="number">0.0</span>, <span class="number">1.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>, <span class="number">1.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>, <span class="number">1.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>, <span class="number">1.0</span>,
<span class="comment">// Back</span>
<span class="number">0.0</span>, <span class="number">0.0</span>, -<span class="number">1.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>, -<span class="number">1.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>, -<span class="number">1.0</span>,
<span class="number">0.0</span>, <span class="number">0.0</span>, -<span class="number">1.0</span>,
<span class="comment">// Top</span>
<span class="number">0.0</span>, <span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, <span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="comment">// Bottom</span>
<span class="number">0.0</span>, -<span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, -<span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, -<span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="number">0.0</span>, -<span class="number">1.0</span>, <span class="number">0.0</span>,
<span class="comment">// Right</span>
<span class="number">1.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>,
<span class="number">1.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>,
<span class="number">1.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>,
<span class="number">1.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>,
<span class="comment">// Left</span>
-<span class="number">1.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>,
-<span class="number">1.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>,
-<span class="number">1.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>,
-<span class="number">1.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>
]), <span class="name">gl</span>.<span class="name">STATIC_DRAW</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="keyword">function</span> <span class="name">initShaders</span>()
{
var <span class="name">vertexShader</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 mediump vec4 vColor; \
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); \
}"</span>, <span class="name">gl</span>.<span class="name">VERTEX_SHADER</span>);
var <span class="name">fragmentShader</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 vec3 texelColor = texture2D(uSampler, vec2(vTextureCoord.s, vTextureCoord.t)).rgb; \
gl_FragColor = vec4(texelColor * vLighting, 1.0); \
}"</span>, <span class="name">gl</span>.<span class="name">FRAGMENT_SHADER</span>);
<span class="comment">// Create the Program3D for shader</span>
var <span class="name">shaderProgram</span> = <span class="name">gl</span>.<span class="name">createProgram</span>();
<span class="comment">// Attach the shader sources to the shader program</span>
<span class="name">gl</span>.<span class="name">attachShader</span>(<span class="name">shaderProgram</span>, <span class="name">vertexShader</span>);
<span class="name">gl</span>.<span class="name">attachShader</span>(<span class="name">shaderProgram</span>, <span class="name">fragmentShader</span>);
<span class="comment">// Link the program</span>
<span class="name">gl</span>.<span class="name">linkProgram</span>(<span class="name">shaderProgram</span>);
<span class="comment">// Check the linking status</span>
<span class="keyword">if</span> (!<span class="name">gl</span>.<span class="name">getProgramParameter</span>(<span class="name">shaderProgram</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">shaderProgram</span>));
}
<span class="comment">// Take the shader program into use</span>
<span class="name">gl</span>.<span class="name">useProgram</span>(<span class="name">shaderProgram</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">shaderProgram</span>, <span class="string">"aVertexPosition"</span>);
<span class="name">gl</span>.<span class="name">enableVertexAttribArray</span>(<span class="name">vertexPositionAttribute</span>);
<span class="name">textureCoordAttribute</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getAttribLocation</span>(<span class="name">shaderProgram</span>, <span class="string">"aTextureCoord"</span>);
<span class="name">gl</span>.<span class="name">enableVertexAttribArray</span>(<span class="name">textureCoordAttribute</span>);
<span class="name">vertexNormalAttribute</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getAttribLocation</span>(<span class="name">shaderProgram</span>, <span class="string">"aVertexNormal"</span>);
<span class="name">gl</span>.<span class="name">enableVertexAttribArray</span>(<span class="name">vertexNormalAttribute</span>);
<span class="comment">// Get the uniform locations</span>
<span class="name">pMatrixUniform</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getUniformLocation</span>(<span class="name">shaderProgram</span>, <span class="string">"uPMatrix"</span>);
<span class="name">mvMatrixUniform</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getUniformLocation</span>(<span class="name">shaderProgram</span>, <span class="string">"uMVMatrix"</span>);
<span class="name">nUniform</span> <span class="operator">=</span> <span class="name">gl</span>.<span class="name">getUniformLocation</span>(<span class="name">shaderProgram</span>, <span class="string">"uNormalMatrix"</span>);
<span class="comment">// Setup texture sampler uniform</span>
var <span class="name">textureSamplerUniform</span> = <span class="name">gl</span>.<span class="name">getUniformLocation</span>(<span class="name">shaderProgram</span>, <span class="string">"uSampler"</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">uniform1i</span>(<span class="name">textureSamplerUniform</span>, <span class="number">0</span>);
<span class="name">gl</span>.<span class="name">bindTexture</span>(<span class="name">gl</span>.<span class="name">TEXTURE_2D</span>, <span class="number">0</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>
<!-- @@@quickitemtexture/qml/quickitemtexture/quickitemtexture.js -->
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<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
of their respective owners. </p>
</div>
</body>
</html>
distrib
>
Mageia
>
6
>
x86_64
>
media
>
core-updates
>
by-pkgid
>
7672afc6a1c5f1f7ad2bfb0b950f0236
>
files
>
138
