Javascript WebGL不是';行不通
以下是我从教程中获得的代码:Javascript WebGL不是';行不通,javascript,html,webgl,Javascript,Html,Webgl,以下是我从教程中获得的代码: <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <script type="text/JavaScript"> var canvas; var gl; function start() { canvas = document.getElementById("glcanvas"); initWebGL(canvas);
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/JavaScript">
var canvas;
var gl;
function start() {
canvas = document.getElementById("glcanvas");
initWebGL(canvas); // Initialize the GL context
// Only continue if WebGL is available and working
if (gl) {
alert("works");
gl.clearColor(0.0, 0.0, 0.0, 1.0); // Set clear color to black, fully opaque
gl.clearDepth(1.0); // Clear everything
gl.enable(gl.DEPTH_TEST); // Enable depth testing
gl.depthFunc(gl.LEQUAL); // Near things obscure far things
}
}
function initWebGL() {
gl = null;
try {
gl = canvas.getContext("experimental-webgl");
}
catch(e) {
}
// If we don't have a GL context, give up now
if (!gl) {
alert("Unable to initialize WebGL. Your browser may not support it.");
}
}
</script>
<body onload="start()">
<canvas id="glcanvas" width="640" height="480">
Your browser doesn't appear to support the <code><canvas></code> element.
</canvas>
应该会出现一个黑匣子,但我只有一个纯白色的屏幕。警报确实出现了。我使用的是firefox和webgl,在about:config中将force:enabled设置为true。为什么黑匣子不出现?你不见了
// Clear the color as well as the depth buffer.
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
在总帐通话结束时
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