30:T157a,/* * Copyright 2010, Google Inc. * All rights reserved. * * 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 Google Inc. 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. */ /** * @fileoverview This file contains functions every webgl program will need * a version of one way or another. * * Instead of setting up a context manually it is recommended to * use. This will check for success or failure. On failure it * will attempt to present an approriate message to the user. * * gl = WebGLUtils.setupWebGL(canvas); * * For animated WebGL apps use of setTimeout or setInterval are * discouraged. It is recommended you structure your rendering * loop like this. * * function render() { * window.requestAnimationFrame(render, canvas); * * // do rendering * ... * } * render(); * * This will call your rendering function up to the refresh rate * of your display but will stop rendering if your app is not * visible. */ WebGLUtils = function() { /** * Creates the HTLM for a failure message * @param {string} canvasContainerId id of container of th * canvas. * @return {string} The html. */ var makeFailHTML = function(msg) { return '' + '

' + msg + '

'; return '' + '' + '

' + '

' + msg + '

' + '

'; }; /** * Mesasge for getting a webgl browser * @type {string} */ var GET_A_WEBGL_BROWSER = '' + 'This page requires a browser that supports WebGL.
' + 'Click here to upgrade your browser.'; /** * Mesasge for need better hardware * @type {string} */ var OTHER_PROBLEM = '' + "It doesn't appear your computer can support WebGL.
" + 'Click here for more information.'; /** * Creates a webgl context. If creation fails it will * change the contents of the container of the