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Computer graphics stuff and robot simulators. I have figured out forward kinematics and I'm trying to figure out inverse kinematics now. There are pictures in my profile. My 'avatar' is one example of the CGI stuff.
"They have a consciousness, they have a life, they have a soul! Damn you! Let the rabbits wear glasses! Save our brothers! Can I get an amen?"
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I've used inverse kinematics in AutoDesk 3D Studio with a biped. Fun stuff.
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I have a recording studioette in the basement where I dick around mixing and remixing then mixing again songs I wrote.
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Writing, recording, mixing my own music, usually very badly.
Creating things with stained or art glass.
DIY home improvement projects.
Exploring a few of Tennessee's 12,000 known caves.
There are no solutions, only trade-offs. - Thomas Sowell
A day can really slip by when you're deliberately avoiding what you're supposed to do.
- Calvin (Bill Watterson, Calvin & Hobbes)
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TNCaver wrote: Tennessee's 12,000 known caves.
Wow, no kidding? There are THAT many caves in Tennessee? That sounds really cool. 
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I think the official count by the Tennessee Cave Survey is actually somewhere around 11,600. But we count anything at least 50' in horizontal length, or at least 30' deep if it's a pit requiring vertical gear, as a cave. And we're finding more every year.
There are no solutions, only trade-offs. - Thomas Sowell
A day can really slip by when you're deliberately avoiding what you're supposed to do.
- Calvin (Bill Watterson, Calvin & Hobbes)
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I really want to re-write a manufacturing system I've supported for 20+ years. Sometime in the near future, there is a small sailboat in my dreams.
Charlie Gilley
“They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.” BF, 1759
Has never been more appropriate.
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Writing a program to calculate fractals rigorously (i.e. being certain that a point is inside, outside, or "unknown" as yet)
Writing a full implementation of the IEEE 754-2019 Floating-Point Standard, with the intention of expanding it to higher-precision types
Learning all the Physics that I missed out on by becoming a software engineer
Converting the WINFRACT (FRACTINT for Windows) program to run on Win32 or Win64
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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may i inquire which Physics topics / authors you are studying assuming of course you have time for such whilst writing great code .
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I've always wanted to actually understand General Relativity. The undergraduate degree that I did in Physics only covered Special Relativity. I've been going back to the original papers - Einstein, Minkowski, etc. for the physics, and studying Tensor Analysis from a few different books (M.L. Boas - general math, A. Lichnerowicz - Tensor Calculus, ...). At the rate I'm going, it will probably take me a few years to thoroughly understand the subject, but I'm in no hurry... 
Ditto for everything else. These are hobbies, so I have no deadlines.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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do you have a copy of Gravitation (book) - Wikipedia[^] i use mine as a door stop as i have yet to finish Classical Mechanics (Goldstein) - Wikipedia[^] . it required several readings with an overly lengthy interruption in order to begin to understand virtual displacements as utilized in deducing LaGrange's equations . i have to read it again to consider if my understanding is correct .
re/ tensors i viewed a few years ago a superb YouTube series on the subject . unfortunately i no longer have the link .
also do you have a copy of "Spacetime Physics", Second Edition by Edwin F. Taylor and John Archibald Wheeler .
i also have a oopy of Einsein's GR paper . i did not find it helpful . the references to Mach and his ideas i have yet to understand .
i wish you great success in this fine pursuit .
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I have a copy of Gravitation, but not the other books.
I have a copy of Einstein's GR paper, and am trying to collect the papers that Einstein referenced (and in some cases - the papers that they referenced). The problem is that many of them are available only in German - and I don't read German.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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of course it may be useful to steady the original papers . however it seems to me you are eschewing the modern texts . if so i do not understand why . don't forget papers published in scientific journals are terse and not meant to be edumakational exempli gratia Einstein's original GR paper to now a 1,000+ page tome by Wheeler et al . also i am a believer in multiple authors / texts . by the way my undergrad physics instructor was kind enough to give to me the gift of a Xerox "orignal" copy of Michelson's "SPEED OF LIGHT" notebook complete w/ tea cup stains and his fine penmanship .
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I didn't say that I intend to neglect modern treatments of the subject. I just want to start from the original papers, and take it from there. I know, for example, that in order to understand GR I must review Tensor Analysis, study Differential Geometry, etc. before even trying to tackle Einstein's papers, to say nothing of later texts.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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- Trying to not get nuts
- Learning communication skill
- Learning DIY
- Learning survival stuff
- Maybe learning domotics? It was an idea to make a consultant service for Smart-Homes as second job.
M.D.V. 
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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Nelek wrote: - Trying to not get nuts
You're fortunate. Most of us are already already there. 
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I have apart time bladesmithing business. It is a hobby that got out of hand and now I make high end things for collectors.
Aside from that I'm on and off writing a book about DCOM and Windows Security for developers.
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Mersenne primes
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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Chemistry. I turn water, grain, yeast, sugar and hops into beer.
Good stuff and only about $27.95 a bottle.
>64
There is never enough time to do it right, but there is enough time to do it over.
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theoldfool wrote: $27.95 a bottle.
How large are the bottles? If they are standard beer bottles, that's pretty expensive beer!
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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Well, that was tongue in cheek. Point is that I don't make beer to save money. Don't really keep track of cost although many of the recipes are gifts from children/grandchildren. Besides, the alcohol content is high enough to remove worries.
>64
There is never enough time to do it right, but there is enough time to do it over.
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I wouldn't be surprised if a first-time home brewer who want to do everything right, getting all the right equipment in place for his first brew, would end up with that price per bottle.
For his next brew, the price would drop to not much above half of that. For his third brew, probably below $10 a bottle. For his 50th, only slightly above the price of the consumable raw materials. Depending on how he obtains them, the quality, and how much processed they are (grain? syrup?) I wouldn't be surprised if he gets down to $1-2 a bottle.
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True.
Basic 1 gallon beer making kit, including ingredients, jug, tubing, etc, is about $50. Makes 9-10 bottles (12 oz) depending on spillage. After that, the "recipes" ran about $16. This from first outfit I purchased from. The original kit was a present so, "free".
The last 18 gallons were from an outfit in Canada, each recipe makes 23 liters. I make 1 gallon at a time, so conversions are required. I brew like I programed: "Oh, about this much". The last batch usually comes up short. The yeast is a problem so I play government: I throw money at it, buying individual 1 gallon mix packets. SWMBO lays an eyeball on the hops and divides them into 6 portions (23 liters is "about" 6 gallons, 6.07). I like this outfit because the wort comes in a liquid which avoids the boiling process. It is the consistency of molasses. I use purified water, from reverse osmosis process ($1.20 a gallon). Please don't tell me they fill the jugs from the men's room.
So far, I have not purchased many recipes, mostly presents from relatives to keep me from bothering them. I have purchased bottles, caps, Capper, and hydrometer. So, my cost per bottle (so far) is actually negligible.
My beer runs about 6% alcohol and a gallon lasts a month or so depending on friends and relatives to help with consumption. I am not much of a "drinker" and the wife doesn't like beer (hooray). I have one friend who comes over about once a week and we have 1 beer, sitting on my patio, solving most of the world's problems. We are veterans and regale each other with war stories.
Difference between war stories and fairy tales:
Fairy tale: "once upon a time..."
War Story: "this ain't no stuff"...
>64
There is never enough time to do it right, but there is enough time to do it over.
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theoldfool wrote: Chemistry. I turn water, grain, yeast, sugar and hops into beer.
Chemistry? I'm scared of chemistry! I'll just put it like this: I graduated high school with no missing fingers, somehow.
When I saw the word "beer" that's when I knew that I had to upvote your post. 
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It's been pretty much flat out work for me for the last 18 months - which is why I've not been on CP very often. But my contract is up and I'm planning on chilling for a few weeks.
So side projects have taken a back seat, but when I have the time, and energy, I can usually find some DIY stuff to keep me busy. But my "guilty pleasure" is US politics. Yeah, I know politics is a taboo subject on here - so I'll try to stay non-partisan. First of all, I should declare: I'm not an American and I don't live in the US - so I have no vested interest. But, ever since a reality TV show host got made President, I've been "rubber-knecking" like someone who can't take their eyes of a nasty accident!  There's plenty wrong with politics here in the UK, but our friends across the pond, take it to a whole new level. 
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