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scene.html
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scene.html
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<!DOCTYPE html>
<html>
<script id="xo-vertex-shader" type="x-shader/x-vertex">
attribute vec2 vTexCoord;
attribute vec4 vNormal;
attribute vec4 vPosition;
uniform mat4 modelViewMatrix;
uniform mat4 projectionMatrix;
uniform vec4 ambientProduct, diffuseProduct, specularProduct;
uniform float shininess;
uniform vec4 lightPosition1;
uniform vec4 lightPosition2;
uniform vec3 eyePosition;
varying vec4 fColor;
varying vec2 fTexCoord;
void main()
{
// Light 1
vec3 L;
if(lightPosition1.w == 0.0) L = normalize(lightPosition1.xyz);
else L = normalize(( lightPosition1 - vPosition ).xyz);
vec3 E = normalize(eyePosition);
vec3 H = normalize(L + E);
vec3 N = normalize(-vNormal.xyz);
vec4 ambient = ambientProduct;
float Kd = max( dot(L, N), 0.0 );
vec4 diffuse = Kd*diffuseProduct;
float Ks = pow( max(dot(N, H), 0.0), shininess );
vec4 specular = Ks * specularProduct;
if( dot(L, N) < 0.0 ) {
specular = vec4(0.0, 0.0, 0.0, 1.0);
}
// Light 2
vec3 L2;
if(lightPosition2.w == 0.0) L2 = normalize(lightPosition2.xyz);
else L2 = normalize(( lightPosition2 - vPosition ).xyz);
vec3 H2 = normalize(L2 + E);
float Kd2 = max( dot(L2, N), 0.0 );
vec4 diffuse2 = Kd2*diffuseProduct;
float Ks2 = pow( max(dot(N, H2), 0.0), shininess );
vec4 specular2 = Ks2 * specularProduct;
if( dot(L2, N) < 0.0 ) {
specular2 = vec4(0.0, 0.0, 0.0, 1.0);
}
fColor = ambient + diffuse + specular+ diffuse2 + specular2;
fColor.a = 1.0;
gl_Position = projectionMatrix*modelViewMatrix*vPosition;
// Texture coordinates
fTexCoord = vTexCoord;
}
</script>
<script id="xo-fragment-shader" type="xo-shader/x-fragment">
precision mediump float;
uniform sampler2D texture;
varying vec4 fColor;
varying vec2 fTexCoord;
void main()
{
// TODO light source, bump map, diffuse coefficient, ..
gl_FragColor = fColor * texture2D(texture, fTexCoord);
}
</script>
<script id="grid-vertex-shader" type="x-shader/x-vertex">
attribute vec4 vPosition;
attribute vec2 vTexCoord;
attribute vec3 vNormal;
uniform mat4 modelViewMatrix;
uniform mat4 projectionMatrix;
uniform vec4 ambientProduct, diffuseProduct, specularProduct;
uniform float shininess;
uniform vec4 lightPosition1;
uniform vec4 lightPosition2;
uniform vec3 eyePosition;
varying vec4 fColor;
varying vec2 fTexCoord;
void main()
{
// Light 1
vec3 L;
if(lightPosition1.w == 0.0) L = normalize(lightPosition1.xyz);
else L = normalize(( lightPosition1 - vPosition ).xyz);
vec3 E = normalize(eyePosition);
vec3 H = normalize(L + E);
vec3 N = normalize(-vNormal.xyz);
vec4 ambient = ambientProduct;
float Kd = max( dot(L, N), 0.0 );
vec4 diffuse = Kd*diffuseProduct;
float Ks = pow( max(dot(N, H), 0.0), shininess );
vec4 specular = Ks * specularProduct;
if( dot(L, N) < 0.0 ) {
specular = vec4(0.0, 0.0, 0.0, 1.0);
}
// Light 2
vec3 L2;
if(lightPosition2.w == 0.0) L2 = normalize(lightPosition2.xyz);
else L2 = normalize(( lightPosition2 - vPosition ).xyz);
vec3 H2 = normalize(L2 + E);
float Kd2 = max( dot(L2, N), 0.0 );
vec4 diffuse2 = Kd2*diffuseProduct;
float Ks2 = pow( max(dot(N, H2), 0.0), shininess );
vec4 specular2 = Ks2 * specularProduct;
if( dot(L2, N) < 0.0 ) {
specular2 = vec4(0.0, 0.0, 0.0, 1.0);
}
fColor = ambient + diffuse + specular+ diffuse2 + specular2;
fColor.a = 1.0;
gl_Position = projectionMatrix*modelViewMatrix*vPosition;
// Texture coordinates
fTexCoord = vTexCoord;
}
</script>
<script id="grid-fragment-shader" type="x-shader/x-fragment">
precision mediump float;
uniform sampler2D texture;
varying vec4 fColor;
varying vec2 fTexCoord;
void main()
{
gl_FragColor = fColor * texture2D(texture, fTexCoord);
}
</script>
<script id="plane-vertex-shader" type="x-shader/x-vertex">
attribute vec4 vPosition;
attribute vec2 vTexCoord;
attribute vec3 vNormal;
attribute vec3 vTangent;
uniform mat4 modelViewMatrix;
uniform mat4 projectionMatrix;
uniform mat3 normalMatrix;
uniform vec3 eyePosition;
uniform vec4 lightPosition;
varying vec2 fTexCoord;
varying vec3 fragmentPos;
varying vec3 tangentEyePos;
varying vec3 tangentLightPos;
varying vec3 tangentFragmentPos;
void main()
{
gl_Position = projectionMatrix*modelViewMatrix*vPosition;
fTexCoord = vTexCoord;
fragmentPos = vec3(modelViewMatrix * vec4(vPosition.xyz, 1.0));
// Create Tangent Normal Bitangent vectors
vec3 T = normalize(normalMatrix * vTangent);
vec3 N = normalize(normalMatrix * vNormal);
T = normalize(T - dot(T, N) * N);
vec3 B = cross(N, T);
// Transpose Tangent Bitangent Normal matrix
mat3 TBN = mat3(T, B, N);
mat3 TBN_transposed = mat3(vec3(TBN[0].x, TBN[1].x, TBN[2].x),
vec3(TBN[0].y, TBN[1].y, TBN[2].y),
vec3(TBN[0].z, TBN[1].z, TBN[2].z));
tangentLightPos = TBN_transposed * lightPosition.xyz;
tangentEyePos = TBN_transposed * eyePosition;
tangentFragmentPos = TBN_transposed * fragmentPos;
}
</script>
<script id="plane-fragment-shader" type="x-shader/x-fragment">
precision mediump float;
uniform sampler2D texture;
uniform sampler2D textureNormals;
varying vec2 fTexCoord;
varying vec3 fragmentPos;
varying vec3 tangentEyePos;
varying vec3 tangentLightPos;
varying vec3 tangentFragmentPos;
void main()
{
// Get normals from texture in range [0,1]
vec4 N = texture2D(textureNormals, fTexCoord);
// Convert range to [-1,1]
vec3 NN = normalize(N.rgb * 2.0 - 1.0);
// get diffuse color
vec3 color = texture2D(texture, fTexCoord).rgb;
// Calculate ambient
vec3 ambient = 0.5 * color;
// Calculate diffuse
vec3 lightDir = normalize(tangentLightPos - tangentFragmentPos);
float diff = max(dot(lightDir, NN), 0.0);
vec3 diffuse = diff * color;
// Calculate specular
vec3 viewDir = normalize(tangentEyePos - tangentFragmentPos);
vec3 reflectDir = reflect(-lightDir, NN);
vec3 halfwayDir = normalize(lightDir + viewDir);
float spec = pow(max(dot(NN, halfwayDir), 0.0), 32.0);
vec3 specular = vec3(0.2) * spec;
gl_FragColor = vec4(ambient + diffuse + specular, 1.0);
}
</script>
<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="objLoader.js"></script>
<script type="text/javascript" src="scene.js"></script>
<body>
<canvas id="gl-canvas" width="512" height="512">
Oops ... your browser doesn't support the HTML5 canvas element
</canvas>
<img id = "woodImage" src = "wood.png" hidden></img>
<img id = "worldImage" src = "world.png" hidden></img>
<img id = "ballImage" src = "ball.png" hidden></img>
<img id = "donutImage" src = "donut.png" hidden></img>
<img id = "brickImage" src = "brickwall.jpg" hidden></img>
<img id = "brickNormalImage" src = "brickwall_normal.jpg" hidden></img>
<img id = "waterImage" src = "Water_DISP.jpg" hidden></img>
<img id = "waterNormalImage" src = "Water_NRM.jpg" hidden></img>
<img id = "sciImage" src = "sci.jpg" hidden></img>
<img id = "sciNormalImage" src = "sci_normal.jpg" hidden></img>
<br/>
</body>
</html>