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If you do, watch the vid.
But be aware that the "F-word" appears on screen several times, because it was included in the game code comments - and I can understand why ... that's about the one time I'd let it pass in my code as well. 
Fast Inverse Square Root — A Quake III Algorithm - YouTube[^]
That is so obvious once you've seen it! (The vid deserves a like purely for the quality of the explanation.)
And a damn good introduction to IEEE 754 as well. 
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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I love this stuff. 
Real programmers use butterflies
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Herself didn't understand why I was laughing out loud.
She really didn't understand when I explained what I was watching ("IEEE 759, the International Standard for floating point number representation in computers" and a "square root calculating function") and that I was laughing with joy.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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That's probably the best explanation for that algorithm I've seen so far
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I loved that video, he should do more as he's very talented in explaining complex stuff.
GCS d--(d-) s-/++ a C++++ U+++ P- L+@ E-- W++ N+ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
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It's just so rare to find anything on YT where the author knows what he's talking about, and can explain it so well.
He should do more.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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I have a bunch of channels I love.
MVG - Modern Vintage Gamer usually speaks about homebrew / how console were cracked;
Coding Secrets is the channel of Sonic the Hedgehog programmer and explains how they did some "impossible" tricks on SEGA Genesis or PS1 hardware;
Dring 4 Answers taught me more about engines, cars, turbines than I could ever imagine;
Yarnhub, SimpleHistory and the Armchair Historian got me deeper into history than ever.
I also follow an unholy number of gun channels and a bunch of swordmanship / medieval weapons channels.
GCS d--(d-) s-/++ a C++++ U+++ P- L+@ E-- W++ N+ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
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Have a look at ThisOldTony as well - he's an amateur metalworker who explains things really well.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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I see we speak the same language
GCS d--(d-) s-/++ a C++++ U+++ P- L+@ E-- W++ N+ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
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den2k88 wrote: I also follow an unholy number of gun channels and a bunch of swordmanship / medieval weapons channels.
And appear on sooooo many "antiterrorism lists" ...
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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I got used to that the day I looked for some fun takes on N*zi propaganda (i.e. the video of Born to be Alive with Mr. Moustache "dancing" to it) but of course YouTube collected it under N*zi videos.
Alongside black metal, swords, guns, explosives. So yeah, I am on at least a dozen no-fly lists.
GCS d--(d-) s-/++ a C++++ U+++ P- L+@ E-- W++ N+ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
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Tom Scott's channel is highly recomended, esp if your a brit.
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I watch his videos occasionally, he's fine but a bit all over the place, I prefer very specific channels with in depth explanations. Though Tom Scott often piques my curiosity with interesting trivia.
GCS d--(d-) s-/++ a C++++ U+++ P- L+@ E-- W++ N+ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
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If you like music, you should check out Rick Beato, especially the "what makes the song great" series.
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Check out bigclive - very good.
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As an ex-embedded engineer (retired now), I love bit twiddling and fast approximations. I never need this particular approximation but it's very clever and probably not something I'd ever figure out on my own.
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Interesting, but I have some doubts it is still relevant with modern compilers and CPUs. Even if it were, a simple lookup table would be faster for the purpose of finding the first estimation.
This algortihm reminds me a bit of Bresenham's line algorithm - Wikipedia[^] : extremely clever, but once it was hard-wired in every graphcs chip there was little point knowing about it. Except maybe to apply such principles to similar problems in other areas.
E. g. I tend to do calculations with 2D and 3D vectors a lot, and if I were to do these calculations straightforward, then yes, I'd need to do a lot of vector normalizations (i. e. calculations of 1/sqrt(x)). But in about 8-9 out of 10 cases I can avoid normalization alltogether by transforming the expressions. E. g. when I want to know whether a vector length is very small (effectively null), then I compare the squared length against the squared threshold value. Or when I calculate the intersection of a plane with a line, I determine the intersection without normalizing any vector. Instead I transform the equations in such a way that I end up with the squared length of the line direction vector, and the plane direction or normal vectors don't need to be normalized at all.
I do agree that the explanations and specifically the animated number representations are formidable, though
GOTOs are a bit like wire coat hangers: they tend to breed in the darkness, such that where there once were few, eventually there are many, and the program's architecture collapses beneath them. (Fran Poretto)
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Found this great tip in a Dutch computer magazine:
Quote: You might have some (network)devices that have leds on top to display their status, which might not be visible when tucked away somewhere. To make the leds better visible from a distance take the balls out of some deodorant rollers and place these on top of the led lights
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Or you might have one like my AC1750[^] that puts up a light show like a Christmas tree. The solution is a piece black electrical tape.
Come to think of it, deodorant balls and electrical tape might be, for light problems, what duct tape and WD40 are for mechanical design 
Mircea
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To put it in the words of CodeWraith:
Quote: May the duct tape be with you!
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If you just want to disable the nightlight feature while still having statuses visible when needed, I've found LightDims a good solution.
Did you ever see history portrayed as an old man with a wise brow and pulseless heart, weighing all things in the balance of reason?
Is not rather the genius of history like an eternal, imploring maiden, full of fire, with a burning heart and flaming soul, humanly warm and humanly beautiful?
--Zachris Topelius
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How easy would this be to set up?
Oh - no sweat!
If you can't laugh at yourself - ask me and I will do it for you.
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Just don't buy them from a Swedish chemist[^]. 
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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I recently attempted for the first time to ZIP some files I was surprised that each file and directory I selected was placed in the base root of the ZIP file I naively assumed the ZIP program and I have tried several to wit 7-ZIP Zip Free WinRAR and WinZip would place them into the root which is common to them all I utilized the Relative Paths setting for each entry I required this common root arrangement because these are source files utilized in a Visual Studio solution so their paths relative to each other needed to be unchanged The solution I finally decided upon was to copy each of the target files into a separate common root directory and then to simply emplace this directory into the ZIP file and Voila it worked However I still believe it is stupid to be required to do this So either I do not understand how to distribute software using ZIP or people have been enduring this copy requirement w/o complaint If that is the case I am fantasizing of writing a ZIP program which provides the option of calculating the common root so there is no need to perform the aforementioned copy So I seek your advice in telling me what is wrong w/ my fantasy Thank You Kindly
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When did your '.' key break?
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