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Release id #116340 : Time Machine
2022-01-22
01:04
Shadow
Account closed
Registered: Apr 2002
Posts: 355
Release id #116340 : Time Machine
Multiplexers are cool, and multiplexed DYSPs are of course even cooler!
I started thinking about the record here (32 sprites, 100 pixels y-movement) and when I calculate it, it seems mathematically impossible.
Taking 32 evenly distributed points along a 50-radius sine wave, I end up with at least 9 coordinates that are within 21 y pixels of each other, which would mean lines with 9 sprites on them.
Now, this demo uses added sines, and maybe it's here I'm messing up, because when experimenting with this, no matter what I try with two added sines, I always end up with worst-cases that are even worse than the original single sine.
Am I missing some simple math, or is this just a case of good old demo magic cheating somehow? :)
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2022-01-24
09:20
HCL
Registered: Feb 2003
Posts: 731
Oh yeah.. i'm the subject of another deep discussion *again* ;)..
Haha, i actually found the bunch of c-programs that i used for generating those sinuses, ending up with almost one program specialized for the properties of each part in the demo.. I will save you from that mess, but yes they loop through some million sinuses, first finding the best angular offsets for the purpose, and then trying a bunch of fraction offsets to the results to see if the quantization (float -> integer) accidentally generates a better result..
Simply rocket science at its best :D.
2022-01-24
14:49
chatGPZ
Registered: Dec 2001
Posts: 11523
As always, if you can't make it work using brute force, use a bigger hammer :=)
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