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以下是代碼我從一個教程了:WebGL是不工作
<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>
黑匣子應該顯示出來,但我只是得到一個純白色的屏幕。警報確實顯示。我在about:config中使用firefox和webgl-force:enabled設置爲true。黑匣子爲什麼不出現?