Skip to content

Instantly share code, notes, and snippets.

View mourner's full-sized avatar
🔥
making stuff faster

Volodymyr Agafonkin mourner

🔥
making stuff faster
5.6k followers · 294 following
View GitHub Profile
@mourner
mourner / shadows.html
Created August 17, 2018 20:52
Experimental Mapbox GL shadows (for custom-layers branch)
<!DOCTYPE html>
<html>
<head>
<title>Mapbox GL JS debug page</title>
<meta charset='utf-8'>
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<link rel='stylesheet' href='/dist/mapbox-gl.css' />
<style>
body { margin: 0; padding: 0; }
html, body, #map { height: 100%; }
@mourner
mourner / bench_geodata.js
Created April 27, 2018 13:02
const numFeatures = 100;
const numPolygons = 5;
const numRings = 10;
const numPoints = 10000;
console.time('populate storage');
const features = [];
for (let i = 0; i < numFeatures; i++) {
@mourner
mourner / LICENSE.txt
Last active March 7, 2024 16:53
Scrape air raid sirens in Ukraine from Telegram
ISC License
Copyright (c) 2022 Volodymyr Agafonkin
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
@mourner
mourner / TileLayer.Common.js
Created February 11, 2012 23:11
Leaflet shortcuts for common tile providers
// Lefalet shortcuts for common tile providers - is it worth adding such 1.5kb to Leaflet core?
L.TileLayer.Common = L.TileLayer.extend({
initialize: function (options) {
L.TileLayer.prototype.initialize.call(this, this.url, options);
}
});
(function () {
@mourner
mourner / geobuf2.proto
Last active June 5, 2023 06:38
A new take on Geobuf compact geospatial encoding format
option optimize_for = LITE_RUNTIME;
message Data {
message FeatureCollection {
repeated Feature features = 1;
}
message Feature {
@mourner
mourner / index.css
Last active May 31, 2023 07:00
Mapbox GL JS + SunCalc hack Friday
html, body {
margin: 0;
font-family: sans-serif;
}
#map {
position: absolute;
top: 45px;
bottom: 0;
@mourner
mourner / .aliases
Last active December 12, 2022 09:19
dotfiles
alias ..="cd .."
alias ...="cd ../.."
alias ....="cd ../../.."
alias .....="cd ../../../.."
# Shortcuts
alias db="cd ~/Dropbox"
alias dl="cd ~/Downloads"
alias dt="cd ~/Desktop"
alias p="cd ~/projects"
@mourner
mourner / str-concat.js
Last active October 18, 2022 21:15
A benchmark that demonstrates something is wrong with v8's concatenation performance
const N = 1000000;
function simpleConcat() {
let str = '';
for (let i = 0; i < N; i++) {
str += 'a';
}
return str;
}
@mourner
mourner / contours.js
Created September 29, 2017 13:31
Quick example of generating GeoJSON contours from raster with d3
'use strict';
var contours = require('d3-contour').contours;
var PNG = require('pngjs').PNG;
var fs = require('fs');
var png = PNG.sync.read(fs.readFileSync('./rain.png'));
var data = [];
for (var i = 0; i < png.height; i++) {
@mourner
mourner / tiles.js
Created February 5, 2014 15:21
Leaflet — get all tile URLs given geographic bounds, tile layer and zoom
function getTileUrls(bounds, tileLayer, zoom) {
var min = map.project(bounds.getNorthWest(), zoom).divideBy(256).floor(),
max = map.project(bounds.getSouthEast(), zoom).divideBy(256).floor(),
urls = [];
for (var i = min.x; i <= max.x; i++) {
for (var j = min.y; j <= max.y; j++) {
var coords = new L.Point(i, j);
coords.z = zoom;