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lab3.html
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<!DOCTYPE html>
<html>
<script type="text/javascript" src="webgl-utils.js"></script>
<script type="text/javascript" src="initShaders.js"></script>
<script type="text/javascript" src="MV.js"></script>
<script type="text/javascript" src="lab3.js"></script>
<script id="vertex-shader" type="x-shader/x-vertex">
attribute vec4 vPosition;
attribute vec3 vNormal;
varying vec4 fColor;
uniform vec4 ambientProduct, diffuseProduct, specularProduct;
uniform mat4 modelViewMatrix;
uniform mat4 projectionMatrix;
uniform vec4 lightPosition;
uniform float shininess;
void main()
{
vec3 pos = -(modelViewMatrix * vPosition).xyz;
vec3 light = lightPosition.xyz;
vec3 L = normalize( light - pos );
vec3 E = normalize( -pos );
vec3 H = normalize( L + E );
vec4 NN = vec4(vNormal,0);
// Transform vertex normal into eye coordinates
vec3 N = normalize( (modelViewMatrix*NN).xyz);
// Compute terms in the illumination equation
vec4 ambient = ambientProduct;
float Kd = max( dot(L, N), .10 );
vec4 diffuse = Kd*diffuseProduct;
float Ks = pow( max(dot(N, H), .9), shininess );
vec4 specular = Ks * specularProduct;
if( dot(L, N) < 0.0 ) {
specular = vec4(0.0, 0.0, 0.1, 1.0);
}
gl_Position = projectionMatrix * modelViewMatrix * vPosition;
fColor = ambient + diffuse +specular;
fColor.a = 1.0;
}
</script>
<script id="fragment-shader" type="x-shader/x-fragment">
precision mediump float;
uniform int i;
varying vec4 fColor;
void
main()
{
vec4 c[7];
c[0] = fColor;
if(i==0) gl_FragColor = c[0];
}
</script>
<body>
<div>
<canvas id="gl-canvas" width="600" height="600">
Oops ... your browser doesn't support the HTML5 canvas element
</canvas>
</div>
<div><!--
<button id = "ButtonX">Rotate X</button>
<button id = "ButtonY">Rotate Y</button>
<button id = "ButtonZ">Rotate Z</button>
<button id = "ButtonT">Toggle Rotation</button>-->
<p>
<button id = "left">counterclockwise y</button>
<button id = "right">clockwise y</button>
<button id = "up">counterclockwise x</button>
<button id = "down">clockwise x</button>
</p>
<p>Buttons and ASWD</p>
</div>
</body>
</html>