3 ms·
Fast Inverse Square Root Function - Seems to have been created for Quake
- dangoldin 18y agoThe PDF: http://www.lomont.org/Math/Papers/2003/InvSqrt.pdf http://www.lomont.org/Math/Papers/2003/InvSqrt.pdf
- pchristensen 18y agoIt is at the point now where I click on the comments for every scribd.com story to see if someone has pasted in the original pdf url. Never fails.
- dangoldin 18y agoI've noticed everyone likes the PDF version. It's trivial to add it as a comment since I have it copied in the clipboard from creating the submission - it's my standard practice now.
- axod 18y agoSure fire way to get karma it seems.
- dangoldin 18y agoDefinitely. After a few hundred it doesn't really matter though.
- notauser 18y agoThen why not submit the direct PDF link in the first place? Or is it a 'helpful' news.yc antifeature? (PDF readers actually load faster than scribed, provided you aren't using the vanilla Adobe one with all the plugins turned on.)
- dangoldin 18y agoIt's a "helpful" feature. All PDF links are auto converted to scribd.
- xirium 18y agoIt would be more useful if the original hyperlink to a PDF file was preserved and a hyperlink to scribd was also presented. This would also eliminate a problem with duplicate hyperlink suppression.
- Kaizyn 18y agoAs most readers here already know, scribd is a YCombinator startup, so it's a useful feature for news.YC to have.
- apu 18y agoThe history of this function: http://www.beyond3d.com/content/articles/8/ http://www.beyond3d.com/content/articles/8/ Finding the original author of the function (Greg Walsh): http://www.beyond3d.com/content/articles/15/ http://www.beyond3d.com/content/articles/15/
- zenspider 18y agogreat... now we can have all the posts that repeat every 3 months on programming.reddit repeat here too! YAY for signal:noise.
- huhtenberg 18y agoJust don't upvote the submission. If it's a major dupe, it will get off the front page very quickly.
- mnemonicsloth 18y agoNo. The "inverse square root function" is the "square function." What you want is a function that gives the inverse of a square root. Mathematical terminology sucks.
- etal 18y agoI was thinking the same thing. int inverse_square_root(int x) { return x * x; } // patent pending
- paulgb 18y agoIf you just want the big picture, this link is easier to skim: http://betterexplained.com/articles/understanding-quakes-fast-inverse-square-root/ http://betterexplained.com/articles/understanding-quakes-fas...