Jim Finnis jimfinnis

Lecturer at Aberystwyth University. Image processing, weird neural networks, auto driving. Before that, decades in the games industry.

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jimfinnis / airlock.cs

Last active November 18, 2025 10:58

	// The door name. Inner door, outer door and airvent must have this in the name.
	// Doors must also have [OUTER] and [INNER] also, and the displays must have [DISP]

	private string doorName = "vingdoor";
	private const bool DISABLE_VENT = true; // if true, disable air vent when not using airlock

	private int tick=-1; // how long we have been in the current state; -1 nonsense value at start.

	private const float HIGH = 0.95f; // high pressure threshold
	private const float LOW = 0.05f; // low pressure threshold

jimfinnis / moonphase_ST7735.cpp

Created April 20, 2025 09:47

Rendering the phase of the moon accurately on an ST7735 using Bodmer's TFT_eSPI library

	void display_moon(float phase, int16_t x, int16_t y, int16_t r){
	// phase here is 0-1, where 0 and 1 are new and 0.5 is full.
	// The x and y are the centre of the moon, and size is the radius of the moon.
	// Yes, there's a lot of duplication here. Could be tidied up.

	float n; // generally means "amount illuminated" or "amount not illuminated"


	if(phase<0.25){
	// we fill a circle and then draw a black ellipse

jimfinnis / fup

Last active December 6, 2022 16:21

This is the magic behind the shell "up" command. You can do "up 3" to go up 3 levels in the directory hierarchy, or "up foo" to go up to a directory whose name contains "foo".

	#!/usr/bin/python3
	# Used as part of 'up' to move up complex directory trees:

	# With no args, prints '..'
	# With a numeric argument, prints '../../' up as many levels as the arg.
	# With a string argument, looks for a string in the path, and prints '../'
	# enough times to go up to that directory.
	#
	# You also need to add to your .bash (I use .bash_aliases):
	#

jimfinnis / mloop.cpp

Created March 22, 2016 11:07

	double prevtime = now();
	for(;;){
	render();
	double t = now() - prevtime;
	prevtime = now();
	while(t>MINUPDATETIME){
	update(MINUPDATETIME);
	t-=MINUPDATETIME;
	}
	update(t);

jimfinnis / timer.h

Created March 22, 2016 10:20

Linux timer code


	#include <stdio.h>
	#include <time.h>

	// calculate time in seconds between two timespecs

	inline double time_diff(timespec start, timespec end)
	{
	timespec temp;
	if ((end.tv_nsec-start.tv_nsec)<0) {

jimfinnis / keybase.md

Created February 6, 2016 10:51

Keybase proof

I hereby claim:

I am jimfinnis on github.
I am jimfinnis (https://keybase.io/jimfinnis) on keybase.
I have a public key ASA9c-OHMfFtiCUK2jIZN958JncMTZXfEJ3tDjtjKpKLHgo

To claim this, I am signing this object:

jimfinnis / md5.cpp

Created December 4, 2015 15:27

	/**
	* @file advent.cpp
	* @brief Brief description of file.
	*
	*/

	#include <stdio.h>
	#include <stdlib.h>

	#include <angort/angort.h>

jimfinnis / jokes.py

Created August 30, 2015 15:04

	f = open('jokes.txt','r')
	jokes = [x.strip() for x in f.read().split('%%')]
	...
	j = random.choice(jokes)

jimfinnis / gist:6823802

Created October 4, 2013 10:13

C++/C code to send UDP packets.


	#include <stdio.h>
	#include <sys/socket.h>
	#include <netinet/in.h>
	#include <arpa/inet.h>
	#include <unistd.h>
	#include <strings.h>
	#include <string.h>
	#include <fcntl.h>
	#include <stdlib.h>