WebGL-tutorial/code00.html at master · hguo/WebGL-tutorial · GitHub

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<!DOCTYPE html>

<html>

<head>
<title>hwshen WebGL &mdash; Simple Canvas </title>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">

<script type="text/javascript">
    var gl;
    function initGL(canvas) {
        try {
            gl = canvas.getContext("experimental-webgl");
            gl.viewportWidth = canvas.width;
            gl.viewportHeight = canvas.height;
        } catch (e) {
        }
        if (!gl) {
            alert("Could not initialise WebGL, sorry :-(");
        }
    }

    function drawScene() {
        gl.viewport(0, 0, gl.viewportWidth, gl.viewportHeight);
        gl.clear(gl.COLOR_BUFFER_BIT); //  | gl.DEPTH_BUFFER_BIT);
        // 0x0001 | 0x0002
    }


    function webGLStart() {
        var canvas = document.getElementById("code00-canvas");
        initGL(canvas);
        gl.clearColor(1.0, 1.0, 0.0, 1.0); // yellow
        drawScene();
    }
</script>
</head>


<body onload="webGLStart();">

    <canvas id="code00-canvas" style="border: none;" width="700" height="500"></canvas>

    <br/>

</body>


</html>