index.html

<!DOCTYPE HTML> 
<html lang="en"> 
<head>
<title>Hello Mesh </title>
<meta charset="utf-8"> 
<style>
    body {
      -webkit-touch-callout: none;
      -webkit-user-select : none;
    }
</style>
</head>

    
<script id="shader-vs" type="x-shader/x-vertex">
    attribute vec3 aVertexNormal;
    attribute vec3 aVertexPosition;
   
    uniform mat4 uMVMatrix;
    uniform mat4 uRTeapotMatrix;
    uniform mat3 uNMatrix;
    uniform mat4 uPMatrix;
    
    //varying vec4 vColor;
    varying vec3 vVertexNormal;
    varying vec3 vVertexPosition;


    void main(void) {
        vec4 vertexPositionEye4 = uMVMatrix *uRTeapotMatrix* vec4(aVertexPosition, 1.0);
        vVertexPosition = vertexPositionEye4.xyz / vertexPositionEye4.w;
        vec4 normalRot = uRTeapotMatrix * vec4(aVertexNormal, 1.0);
        vVertexNormal = normalize(uNMatrix * normalRot.xyz);
    
        gl_Position = uPMatrix * vertexPositionEye4;
    }
</script>
  
<script id="shader-fs" type="x-shader/x-fragment">
    precision highp float;
    varying vec4 vColor;
    varying vec3 vVertexNormal;
    varying vec3 vVertexPosition;
    
    uniform mat4 uMVMatrix;
    uniform mat4 uRMatrix;
    uniform vec3 uAmbientLightColor;
    uniform vec3 uDiffuseLightColor;
    uniform vec3 uSpecularLightColor;
    uniform vec3 uAmbientMaterialColor;
    uniform vec3 uDiffuseMaterialColor;
    uniform vec3 uSpecularMaterialColor;
    uniform vec3 uLightPosition;
    uniform float uShininess;

    uniform samplerCube uCubeSampler;
    uniform float uIsReflective;

    void main(void) {
        vec4 newLight = uMVMatrix * vec4(uLightPosition, 1.0);
        vec3 vectorToLightSource = normalize(newLight.xyz - vVertexPosition);
        
        // Need to rotate the normal for the texture sampling (and mirror it)
        vec4 newNormal = uRMatrix * vec4(vVertexNormal, 1.0);
        newNormal.x = -newNormal.x;

        // Calculate n dot l for diffuse lighting
        float diffuseLightWeightning = max(dot(vVertexNormal, vectorToLightSource), 0.0);
                                           
        // Calculate the reflection vector (r) that is needed for specular light
        vec3 reflectionVector = normalize(reflect(-vectorToLightSource, vVertexNormal));
        
        // The camera in eye coordinates is located in the origin and is pointing
        // along the negative z-axis. Calculate viewVector (v) 
        // in eye coordinates as:
        // (0.0, 0.0, 0.0) - vertexPositionEye3
        vec3 viewVectorEye = -normalize(vVertexPosition);
        
        float rdotv = max(dot(reflectionVector, viewVectorEye), 0.0);
        
        float specularLightWeightning = pow(rdotv, uShininess);

        
        // Sum up all three reflection components and send to the fragment shader
        vec4 fColor = vec4(((uAmbientLightColor*uAmbientMaterialColor)
                    + (uDiffuseLightColor*uDiffuseMaterialColor) * diffuseLightWeightning
                    + (uSpecularLightColor*uSpecularMaterialColor) * specularLightWeightning),1.0);

        if(uIsReflective == 1.0)
            gl_FragColor = textureCube(uCubeSampler, newNormal.xyz)*0.9 + fColor*0.3;
        else
            gl_FragColor = fColor;
    }
</script>

<script id="shader-vs-skybox" type="x-shader/x-vertex">
    attribute vec3 aVertexPosition;

    uniform mat4 uMVMatrix;
    uniform mat3 uNMatrix;
    uniform mat4 uPMatrix;

    varying vec4 vVertexPosition;

    void main(void) {
        vVertexPosition = vec4(aVertexPosition, 1.0);
        vec4 pos = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0);
        gl_Position = pos.xyww;
    }
</script>

<script id="shader-fs-skybox" type="x-shader/x-fragment">
    precision mediump float;

    varying vec4 vVertexPosition;
    uniform samplerCube uCubeSampler;

    void main(void) {
        vec4 color = textureCube(uCubeSampler, normalize(vVertexPosition).xyz);
        gl_FragColor = vec4(color.xyz, 1.0);
    }
</script>

<script src="gl-matrix-min.js"></script> 
<script src="webgl-utils.js"></script> 
<script src="TriMesh.js"></script>
<script src="skybox.js"></script>
<script src="mp3.js"></script>   
<body onload="startup();">
<canvas id="myGLCanvas" width="1000" height="800"></canvas>
    <form id="input_form">
        <fieldset>
            <legend>Frame Parameters v1.1</legend>
            <input type="radio" name="primitive" id="wireframe" value="wireframe"> Wireframe
            <input type="radio" name="primitive" id="polygon" id="polygon" value="polygon" checked> Polygon
            <input type="radio" name="primitive" id="wirepoly" value="wirepoly" > Polygon with Edges  
        </fieldset>
    </form>
    <form id="input_form2">
        <fieldset>
            <legend>Teapot Rendering Parameters</legend>
            <input type="radio" name="primitive" id="shading" value="wireframe"> Simple Shading
            <input type="radio" name="primitive" id="reflective" id="polygon" value="polygon" checked> Reflective
        </fieldset>
    </form>
    <div>
        <h4> Rotate Around Teapot </h4>
        <button type="button" onclick="leftButton()">Left</button><button type="button" onclick="rightButton()">Right</button>
        <h4> Rotate Teapot Itself</h4>
        <button type="button" onclick="TupButton()">Up</button><p></p>
        <button type="button" onclick="TleftButton()">Left</button><button type="button" onclick="TrightButton()">Right</button><p></p>
        <button type="button" onclick="TdownButton()">Down</button>
    </div>
</body>

</html>