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Nate Vack njvack

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njvack / catmullrom2bezier.js
Created October 10, 2013 21:01
A routine to compute the cubic Bézier spline parameters to fit a curve to points, using the Catmull-Rom algorithm.
//************************************************
//
// Catmull-Rom Spline to Bezier Spline Converter
//
//
// This is an experimental extension of the SVG 'path' element syntax to
// allow Catmull-Rom splines, which differs from Bézier curves in that all
// defined points on a Catmull-Rom spline are on the path itself.
//
// This is intended to serve as a proof-of-concept toward inclusion of a
@njvack
njvack / convert_db_to_utf8.rb
Created July 30, 2013 13:57
#!/usr/bin/env ruby
require 'rubygems'
require 'mysql2'
Mysql2::Client.default_query_options.merge!(:as => :array)
conn = Mysql2::Client.new(:host => 'localhost', :username => 'user',
:password => 'pw', :database => 'db')
tables = conn.query("SHOW TABLES").map {|row| row[0] }
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njvack / index.html
Created November 15, 2012 18:35
Circle packing, study data
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<style>
text { font: 10px sans-serif; }
</style>
</head>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
@njvack
njvack / expressify.py
Created September 21, 2012 02:30
My stab at safe python evaluation
import ast
import math
SAFE_FX = {
'exp': math.exp,
}
SAFE_NODES = set(
(ast.Expression,
ast.Num,
@njvack
njvack / memory_watch.rb
Created April 12, 2012 01:33
A slightly-overengineered utility to watch signal memory-hungry unicorn workers
#!/usr/bin/env ruby
class HumanBinarySize
MATCHER = /([\d_,]+) *([kmgtp])?b?/i
MULTIPLIER = {
'b' => 1,
'k' => 2**10,
'm' => 2**20,
'g' => 2**30,
@njvack
njvack / dabblet.css
Created March 1, 2012 21:59
The first commented line is your dabblet’s title
/**
* The first commented line is your dabblet’s title
*/
background: #f00;
background: linear-gradient(-90deg, #a0d, yellow);
min-height:100%;
@njvack
njvack / index.html
Created February 6, 2012 15:06
HTML nesting test
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>Test</title>
</head>
<body>
<div style="width: 500px; background-color:#F33;">
This is the outer div
<div style="background-color: #FAA; padding: 10px; margin:10px;">
@njvack
njvack / hostname_middleware.py
Created February 3, 2012 19:38
Trivial fix for HTTP_HOST problems with reverse-proxied Django
"""
Simply copies the X_FORWARDED crap into HTTP_HOST and SERVER_NAME.
"""
class SetHostname(object):
def process_request(self, request):
request.META['HTTP_HOST'] = request.META['HTTP_X_FORWARDED_HOST']
request.META['SERVER_NAME'] = request.META['HTTP_X_FORWARDED_SERVER']
@njvack
njvack / index.html
Created January 8, 2012 05:45
Pan run simulator
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Pan math fun</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"> </script>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js"> </script>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.layout.js"> </script>
<script type="text/javascript">
@njvack
njvack / LICENSE
Last active January 16, 2020 14:45
Voronoi-based point picker
Copyright (c) 2020 Nathan Vack
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all