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<html>
<head>
<title>Learning WebGL — lesson 14</title>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
<script type="text/javascript" src="gl-matrix-min.js"></script>
<script type="text/javascript" src="webgl-utils.js"></script>
<script type="text/javascript" src="main.js"></script>
<script id="per-fragment-lighting-fs" type="x-shader/x-fragment">
precision mediump float;
varying vec2 vTextureCoord;
varying vec3 vTransformedNormal;
varying vec4 vPosition;
uniform float uMaterialShininess;
uniform bool uShowSpecularHighlights;
uniform bool uUseLighting;
uniform bool uUseTextures;
uniform vec3 uAmbientLightingColor;
uniform vec3 uPointLightingLocation;
uniform vec3 uPointLightingSpecularColor;
uniform vec3 uPointLightingDiffuseColor;
uniform sampler2D uSampler;
void main(void) {
vec3 ambientLightWeighting = uAmbientLightingColor;
vec3 lightDirection = normalize(uPointLightingLocation - vPosition.xyz);
vec3 normal = normalize(vTransformedNormal);
float diffuseLightBrightness = max(dot(normal, lightDirection), 0.0);
vec3 diffuseLightWeighting = uPointLightingDiffuseColor * diffuseLightBrightness;
vec3 materialAmbientColor = vec3(1,1,1);
vec3 materialDiffuseColor = vec3(1,1,1);
gl_FragColor = vec4(materialAmbientColor*ambientLightWeighting+materialDiffuseColor*diffuseLightWeighting,1);
}
</script>
<script id="per-fragment-lighting-vs" type="x-shader/x-vertex">
attribute vec3 aVertexPosition;
attribute vec3 aVertexNormal;
attribute vec2 aTextureCoord;
uniform mat4 uMVMatrix;
uniform mat4 uPMatrix;
uniform mat3 uNMatrix;
varying vec2 vTextureCoord;
varying vec3 vTransformedNormal;
varying vec4 vPosition;
void main(void) {
vPosition = uMVMatrix * vec4(aVertexPosition, 1.0);
gl_Position = uPMatrix * vPosition;
vTextureCoord = aTextureCoord;
vTransformedNormal = uNMatrix * aVertexNormal;
}
</script>
</head>
<body onload="webGLStart();">
<a href="http://learningwebgl.com/blog/?p=1658"><< Back to Lesson 14</a><br />
<canvas id="landscape-canvas" style="border: none;" width="500" height="500"></canvas>
</body>
</html>