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var saveJson = function(obj) {
	var str = JSON.stringify(obj);
	var data = encode( str );

	var blob = new Blob( [ data ], {
		type: 'application/octet-stream'
	});
	
	var url = URL.createObjectURL( blob );
	var link = document.createElement( 'a' );

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//float n = 5.0;
//float f = 800.0;
	
float getDepth(float z, float n, float f) {
	return (2.0 * n) / (f + n - z*(f-n));
}

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p.__defineGetter__("test", function() {
	return "testing testing";
});

p.__defineSetter__("test", function() {
	// DO SOMETHING
});

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MathUtils = MathUtils || {};

MathUtils.level = function(i) {
	if(i==0) return 1;
	else return i*MathUtils.level(i-1);
}


MathUtils.binCoefficient = function(n, i) {
	return MathUtils.level(n) / ( MathUtils.level(i) * MathUtils.level(n-i) );

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float contrast(float mValue, float mScale, float mMidPoint) {
	return clamp( (mValue - mMidPoint) * mScale + mMidPoint, 0.0, 1.0);
}

float contrast(float mValue, float mScale) {
	return contrast(mValue,  mScale, .5);
}

vec3 contrast(vec3 mValue, float mScale, float mMidPoint) {
	return vec3( contrast(mValue.r, mScale, mMidPoint), contrast(mValue.g, mScale, mMidPoint), contrast(mValue.b, mScale, mMidPoint) );

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// From glfx.js : https://github.com/evanw/glfx.js
float random(vec3 scale, float seed) {
	/* use the fragment position for a different seed per-pixel */
	return fract(sin(dot(gl_FragCoord.xyz + seed, scale)) * 43758.5453 + seed);
}
    
float rand(vec2 co){
	return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
}

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vec3 hsv2rgb(vec3 c)
{
    vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
    vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
    return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
}

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<key>Delete Line</key>
		<string>deleteToBeginningOfLine:, moveToEndOfLine:, deleteToBeginningOfLine:, deleteBackward:, moveDown:, moveToBeginningOfLine:</string>

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#extension GL_EXT_shader_texture_lod : enable

uniform samplerCube uRadianceMap;
uniform samplerCube uIrradianceMap;

#define saturate(x) clamp(x, 0.0, 1.0)
#define PI 3.1415926535897932384626433832795


const float A = 0.15;

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               R            G            B
Silver      0.971519    0.959915    0.915324
Aluminium   0.913183    0.921494    0.924524
Gold        1           0.765557    0.336057
Copper      0.955008    0.637427    0.538163
Chromium    0.549585    0.556114    0.554256
Nickel      0.659777    0.608679    0.525649
Titanium    0.541931    0.496791    0.449419
Cobalt      0.662124    0.654864    0.633732
Platinum    0.672411    0.637331    0.585456