#pseudorandom — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #pseudorandom, aggregated by home.social.
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When you have your favourite playlist in random and can still predict the next song… 😬🫣🙄👀 #pseudorandom #computerscience
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Exploring the TRS-80’s Color BASIC’s Random Number Function - Although these days we get to tap into many sources of entropy to give a pretty go... - https://hackaday.com/2025/08/08/exploring-the-trs-80s-color-basics-random-number-function/ #reverseengineering #retrocomputing #pseudorandom #trs-80 #basic
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The original Rogue level algorithm picks a width for each room between 4 and 25, and a height between 4 and 7.
Ignoring "gone" rooms, that gives 22^9 * 4^9 possibilities with only a 32-bit seed. So some combinations of rooms must be impossible! How does the subspace of rooms produced by the limited seed space compare with the theoretical distribution if rnd() was really random?
Weekend project, maybe? I have been thinking ever since #RoguelikeCelebration about how small RNG seeds (or poor PRNG algorithms) limit the expressive range of PCG in ways that might be unexpected.
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The how behind this:
1⃣ Stacking multiple semi-transparent layers increases their alpha where they overlap https://css-tricks.com/adventures-in-css-semi-transparency-land/
What the individual layers look like one under another below 👇
Stacking them increases the overall alpha so that, in some areas, it's > .5
A bit more on the pseudo-randomness effect given by the prime number of px `background-size` https://css-tricks.com/cicada-principle-css/
#css #alpha #cssGradient #gradient #code #coding #frontend #webDev #webDevelopment #cicada #pseudoRandom
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This year's #Turing Award winner is of course Avi Wigderson. I found this highly accessible talk by him on his work on randomness and pseudorandomness, which form the basis of much of cryptography and other parts of computers science. https://www.youtube.com/watch?v=Jz1UoAWD80Q #mathematics #computationalcomplexity #computerscience #random #pseudorandom
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Sometimes I think the #10PRINT algorithm can be used as a kind of #UlamSpiral to prove the quality of a #PseudoRandom number generator ...
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Sometimes I think the #10PRINT algorithm can be used as a kind of #UlamSpiral to prove the quality of a #PseudoRandom number generator ...
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Sometimes I think the #10PRINT algorithm can be used as a kind of #UlamSpiral to prove the quality of a #PseudoRandom number generator ...
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Sometimes I think the #10PRINT algorithm can be used as a kind of #UlamSpiral to prove the quality of a #PseudoRandom number generator ...
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Sometimes I think the #10PRINT algorithm can be used as a kind of #UlamSpiral to prove the quality of a #PseudoRandom number generator ...
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Roll the Radioactive Dice for Truly Random D&D Play - When you have a bunch of people gathered around a table for a “Dungeons & Drag... - https://hackaday.com/2022/11/02/roll-the-radioactive-dice-for-truly-random-dd-play/ #randomnumbergenerator #radioactivity #pseudorandom #mischacks #autunite #uranium #geiger #dice #rng
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Roll the Radioactive Dice for Truly Random D&D Play - When you have a bunch of people gathered around a table for a “Dungeons & Drag... - https://hackaday.com/2022/11/02/roll-the-radioactive-dice-for-truly-random-dd-play/ #randomnumbergenerator #radioactivity #pseudorandom #mischacks #autunite #uranium #geiger #dice #rng
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Roll the Radioactive Dice for Truly Random D&D Play
https://hackaday.com/2022/11/02/roll-the-radioactive-dice-for-truly-random-dd-play/
#randomnumbergenerator #radioactivity #pseudorandom #MiscHacks #autunite #uranium #geiger #dice #rng -
CW: Maths, polynomials, random numbers
Challenge: Given a 33 bit shift register based random number generator, shifting 32 times to make a random integer, we observe that a given value will always appear twice in the sequence. Generally unevenly spaced. How to find a value which has the closest repeat?
We could run for 2^33 iterations and keep a record in a many gigabyte array, but I imagine there's a better way.
Boosts OK!