<p> </p>

<button id = "Button1">Increase Z</button>

<button id = "Button2">Decrease Z</button>

<button id = "Button3">Increase R</button>

<button id = "Button4">Decrease R</button>

<p> </p>

<button id = "Button5">Increase theta</button>

<button id = "Button6">Decrease theta</button>

<button id = "Button7">Increase phi</button>

<button id = "Button8">Decrease phi</button>

<p> </p>

<button id = "Button9">Wider</button>

<button id = "Button10">Narrower</button>

<button id = "Button11">Higher</button>

<button id = "Button12">Shorter</button>

<p> </p>

<script id="vertex-shader" type="x-shader/x-vertex">

attribute vec4 vPosition;

uniform mat4 modelViewMatrix;

uniform mat4 projectionMatrix;

void main()

gl_Position = projectionMatrix*modelViewMatrix*vPosition;

}

<script id="fragment-shader" type="x-shader/x-fragment">

precision mediump float;

uniform vec4 fColor;

gl_FragColor = fColor;

<script type="text/javascript" src="../Common/webgl-utils.js"></script>

<script type="text/javascript" src="../Common/initShaders.js"></script>

<script type="text/javascript" src="../Common/MV.js"></script>

<script type="text/javascript" src="hat.js"></script>

<canvas id="gl-canvas" width="512" height="512">

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