yiwenl

// compression.js
const defaultPrecision = 10;

const encode = (a, b, mPrecision=defaultPrecision) => {
	const precision = mPrecision;
	const base = Math.floor(Math.sqrt(Math.pow(93, precision)));

	let lat = a, lng = b;
	let lng935 = Math.floor( ( parseFloat(lng) +180)*base/360 );
	let lat935 = Math.floor( ( parseFloat(lat) +90)*base/180 );

yiwenl

const dropArea = window;

const preventDefaults = (e)=> {
	e.preventDefault()
	e.stopPropagation();
}

;['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
	dropArea.addEventListener(eventName, preventDefaults, false);
})

yiwenl

vec2 rotate(vec2 v, float a) {
	float s = sin(a);
	float c = cos(a);
	mat2 m = mat2(c, s, -s, c);
	return m * v;
}

yiwenl

vec4 when_eq(vec4 x, vec4 y) {
  return 1.0 - abs(sign(x - y));
}

vec4 when_neq(vec4 x, vec4 y) {
  return abs(sign(x - y));
}

vec4 when_gt(vec4 x, vec4 y) {
  return max(sign(x - y), 0.0);

yiwenl

               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

yiwenl

#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;

yiwenl

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

yiwenl

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);
}

yiwenl

// 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);
}

yiwenl

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) );