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WebGL.html
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WebGL.html
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<!DOCTYPE html>
<html>
<head>
<title>WebGL Project</title>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
<script id="shader-vs" type="x-shader/x-vertex">
attribute vec3 vPosition;
attribute vec2 aTextureCoord;
uniform mat4 uMVMatrix;
uniform mat4 uPMatrix;
varying vec2 vTextureCoord;
varying vec4 fColor;
// For the Phong Illumination Model
attribute vec3 vNormal;
uniform vec4 viewerPosition;
// Array of lights
#define MAX_LIGHTS 5
uniform int numLights;
uniform struct Light {
vec4 position;
mat4 lightSourceMatrix; // for animation
vec3 intensities; //a.k.a the color of the light
vec3 ambientIntensities;
} allLights[MAX_LIGHTS];
// The material properties
uniform vec3 k_ambient;
uniform vec3 k_diffuse;
uniform vec3 k_specular;
uniform float shininess;
void main(void) {
// Just converting the (x,y,z) vertices to Homogeneous Coord.
// And multiplying by the Projection and the Model-View matrix
gl_Position = uPMatrix * (uMVMatrix * vec4(vPosition, 1.0));
// For the fragment shader
vTextureCoord = aTextureCoord;
// Phong Illumination Model
// pos is vertex position after applying the global transformation
vec3 pos = (uMVMatrix * vec4(vPosition, 1.0)).xyz;
// ITERATING THROUGH ALL LIGHT SOURCES
fColor = vec4(0.0, 0.0, 0.0, 0.0); // To add all illumination components
// THE FOR LOOP NEEDS A STOPPING CONSTANT VALUE
for( int i = 0; i < MAX_LIGHTS; i++ )
{
if( i == numLights )
break;
// Ambient component is constant for each light source
vec4 ambient = vec4( k_ambient * allLights[i].ambientIntensities, 1.0 );
fColor += ambient;
// vector from vertex position to light source
vec3 L;
// check for directional light
if(allLights[i].position.w == 0.0)
L = normalize( (allLights[i].lightSourceMatrix * allLights[i].position).xyz );
else
L = normalize( (allLights[i].lightSourceMatrix * allLights[i].position).xyz - pos );
// Vector from the vertex position to the eye
vec3 E;
// The viewer is at the origin or at an indefinite distance
// on the ZZ axis
if(viewerPosition.w == 1.0)
// At the origin
E = -normalize( pos );
else
// On the ZZ axis
E = vec3(0,0,1);
// Halfway vector
vec3 H = normalize( L + E );
// Transform vertex normal into eye coordinates
// Added projection matrix here...
//vec4 N = normalize( uPMatrix * uMVMatrix * vec4(vNormal, 0.0));
vec4 N = normalize( uMVMatrix * vec4(vNormal, 0.0));
// Compute terms in the illumination equation
// Diffuse component
float dotProductLN = L[0] * N[0] + L[1] * N[1] + L[2] * N[2];
float cosNL = max( dotProductLN, 0.0 );
vec4 diffuse = vec4( k_diffuse * cosNL * allLights[i].intensities, 1.0 );
// Specular component
float dotProductNH = N[0] * H[0] + N[1] * H[1] + N[2] * H[2];
float cosNH = pow( max( dotProductNH, 0.0 ), shininess );
vec4 specular = vec4( k_specular * cosNH * allLights[i].intensities, 1.0 );
if( dotProductLN < 0.0 ) {
specular = vec4(0.0, 0.0, 0.0, 1.0);
}
// Adding the components
fColor += diffuse + specular;
}
}
</script>
<script id="shader-fs" type="x-shader/x-fragment">
precision mediump float;
varying vec4 fColor;
varying vec2 vTextureCoord;
uniform sampler2D uSampler;
void main(void) {
gl_FragColor = texture2D(uSampler, vec2(vTextureCoord.s, vTextureCoord.t)) * fColor;
}
</script>
<!-- Default CSS file -->
<link rel="stylesheet" href="css/default.css">
<!-- The JS files -->
<!-- CSV library -->
<script type="text/javascript" src="js/csv.js"></script>
<!-- kD-Tree library -->
<script type="text/javascript" src="js/kdTree-min.js"></script>
<!-- Some useful functions for browser compatibility -->
<script type="text/javascript" src="js/webgl-utils.js"></script>
<!-- Handling vectors and matrices -->
<script type="text/javascript" src="js/maths.js"></script>
<!-- Processing triangle mesh models -->
<script type="text/javascript" src="js/models.js"></script>
<!-- Creating the light sources -->
<script type="text/javascript" src="js/lightSources.js"></script>
<!-- Creating the Textures -->
<script type="text/javascript" src="js/textures.js"></script>
<!-- Creating the scene models -->
<script type="text/javascript" src="js/sceneModels.js"></script>
<!-- WebGL code -->
<script type="text/javascript" src="js/initShaders.js"></script>
<script type="text/javascript" src="js/WebGL.js"></script>
</head>
<body onload="runWebGL();">
<div style="text-align: center">
<canvas id="my-canvas" style="border:1px solid #000000;" width="1280" height="720"></canvas>
<div>
<div class="container" style="text-align: center; width: 1280px; height: 100px; margin: 0 auto;">
<div class="fixed">
<table style="text-align: left">
<tr>
<th>Time</th>
<td id="time">0</td>
</tr>
<tr>
<th>FPS</th>
<td id="fps">0</td>
</tr>
<tr>
<th>Vx</th>
<td id="vx">0</td>
</tr>
<tr>
<th>Vy</th>
<td id="vy">0</td>
</tr>
</table>
</div>
<div class="flex-item">
<table style="text-align: left">
<tr>
<th>Choose the <b>projection type</b>:</th>
<td><select id="projection-selection">
<option value="0">Perspective Projection</option>
<option value="1">Orthogonal Projection</option>
</select>
</td>
</tr>
<tr>
<th>Choose the <b>Texture set</b>:</th>
<td><select id="texture-selection">
<option value="0">Medieval</option>
<option value="1">Nature</option>
<option value="1">Volcano</option>
</select>
</td>
</tr>
<tr>
<th></th>
<td><button id="reset-button">Reset</button></td>
</tr>
</table>
</div>
</div>
</div>
<div id="drop_zone"
style="text-align: center; background-color: white; outline: 2px dashed black; width: 1280px; height: 100px; margin: 0 auto;">
Drop files here:
</div>
</div>
</body>
</html>