Friday, 2015-09-09
Mental Calendar Math
Explanation of how to find the day of the week for a given date, and random drills to practice doing it in your head.
Sunday, 2014-12-21
Minkowski Difference of Convex Polygons
Demo of the Minkowski Difference between two convex polygons showing the CSO (configuration space obstacle) and how it changes as the polygons rotate.
Saturday, 2014-09-27
Reflection Field
Demo of the angles needed to reflect light from a point source to an eye point.
Thursday, 2014-09-18
Easing Functions
An x/|x| style adjustable sigmoid, and a cubic (the usual cubic? Hermite?) easing function.
Wednesday, 2014-02-26
Farm Door Pictures
Art references for an online discussion: pictures of doors around the farm, and a few other things constructed out of rough lumber.
Saturday, 2014-02-01
Cow Pictures
Ellie is five months old...
Wednesday, 2014-01-08
Seed Search Forms
I collected these a couple of years ago for our personal use. This morning I sent the HTML file to the hightunnels list. Then I realized I should put it online so I don't have to keep sending it out when I make updates...
Saturday, 2013-11-02
On the Perils of Being a Farmer and a Math Nut
Friday, 2013-11-01
Playing with Proto-J
After another evening of playing with it, I figured out a bunch more stuff, so here's a version with more description of the language, as well as some corrections to the commentary on the implementation.
Wednesday, 2013-10-30
The Proto Interpreter for J
A very terse (44 lines of C) little interpreter which was apparently part of the inspiration for the implementation of J. I worked through it and wrote up commentary for my personal edification.
Saturday, 2013-08-17
Strongforth.f 1.2
I noticed the other day that Stephan Becher's homepage seems to have disappeared, so I'm posting a copy of Strongforth.f. For convenience, I have also extracted the HTML documentation from the archive and am making it directly available.
Saturday, 2013-08-10
Caterpillar Pictures
We found an interesting yellow caterpillar this morning, so I took a few pictures.
Sunday, 2013-04-28
Forth to HTML
Here's a quick program to mark up Forth source code with HTML tags.
Friday, 2013-04-19
Building Low Tunnels with Quick Hoops
Tuesday, 2013-04-16
Quick Hoops info
I'm breaking my quick-hoops stuff up into several pages, linked from here. I updated the hoop-bender plans so they should actually show up correctly in everything (except IE, grr) and print reasonably well.
Saturday, 2013-04-06
First Lettuce Sprouting
The lettuce we planted a week ago is starting to come up.
Saturday, 2013-03-30
First Seeding Outside
We cleared the spinach and weeds out of one set of quick hoops and planted the first field lettuce of the year.