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@kevinkhill
kevinkhill / giants-causeway.scad
Last active December 12, 2025 04:55
Giants Causeway Generator
// Number of rows in the tessellation
rows = 20;
// Number of columns in the tessellation
cols = 100;
// Width of each hexagonal pillar (circumradius)
hex_size = 4;
// Minimum height of each pillar
height_min = 2;
// Maximum height of each pillar
height_max = 20;
@guest271314
guest271314 / user-defined-tcpsocket-controller-web-api.md
Created August 26, 2023 18:23
How to connect to a TCP server from an arbitrary Web page in the browser

Today we are going to connect to a TCP server from the browser (an arbitrary Web page).

We will be full-duplex streaming messages sent to the server and from the server to the browser.

Chrome has implemented Direct Sockets

The initial motivating use case is to support creating a web app that talks to servers and devices that have their own protocols incompatible with what’s available on the web. The web app should be able to talk to a legacy system, without requiring users to change or replace that system.

gated behind Isolated Web Apps (IWA)

@nanmu42
nanmu42 / isPrivateIP.go
Created January 19, 2021 02:19
Golang: check if IP address is private
// source: https://stackoverflow.com/questions/41240761/check-if-ip-address-is-in-private-network-space
var privateIPBlocks []*net.IPNet
func init() {
for _, cidr := range []string{
"127.0.0.0/8", // IPv4 loopback
"10.0.0.0/8", // RFC1918
"172.16.0.0/12", // RFC1918
"192.168.0.0/16", // RFC1918
"169.254.0.0/16", // RFC3927 link-local
@phrz
phrz / svg2scad.py
Created May 30, 2018 21:43
Converts SVG path notation to OpenSCAD polygon(): supports M,L,C,Z with Bézier interpolation to points.
import string
from collections import OrderedDict
from itertools import count
# precision of output points
decimals = 2
svg = '''M0,0 L66,0 L66,140 L0,140 L0,0 Z M17.5356193,9.91374504 L7.89629934,9.91374504 L7.89629934,34.6390567 L13.9842872,34.6390567 L13.9842872,27.741635 L17.6136633,27.741635 C21.6461094,27.741635 24.6445573,27.0341777 26.6090071,25.619263 C28.5734569,24.2043483 29.555612,21.9699927 29.5554723,18.9161962 C29.5554723,15.8625389 28.5993435,13.5986987 26.687086,12.1246754 C24.7748285,10.6511862 21.7243396,9.91420937 17.5356193,9.91374504 Z M51.2530562,20.2426569 L40.4040722,20.2426569 L40.4040722,9.91374504 L34.3159446,9.91374504 L34.3159446,34.6392308 L40.4040722,34.6390567 L40.4040722,24.9118057 L51.2530562,24.9118057 L51.2530562,34.6392308 L57.3411838,34.6392308 L57.3411838,9.91374504 L51.2530562,9.91391916 L51.2530562,20.2426569 Z'''
def string_to_point_tuple(s):
@sagivo
sagivo / gist:3a4b2f2c7ac6e1b5267c2f1f59ac6c6b
Last active November 18, 2025 15:01
webRTC stun / turn server list
to check if the server works - https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice
stun:
stun.l.google.com:19302,
stun1.l.google.com:19302,
stun2.l.google.com:19302,
stun3.l.google.com:19302,
stun4.l.google.com:19302,
stun.ekiga.net,
stun.ideasip.com,