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2017-03-29 13:36

Rudi
Account closed

Registered: May 2010
Posts: 125

DYPP

Hi,
DYPP - Different Y Pixel Position.
I don't seem to find an explanation on this effect on C64 on codebase or anywhere. Maybe its in another thread here on csdb, then please provide an link.

I know the basics of sines, ive made sinescroll on PC, but its easier there since you can look up the framebuffer directly, via sine-tables and so on.

Im wondering how this effect is easily made on C64. I believe there are more than one way, but i guess one way is slower than the other; for example moving each column-bit (inside a char) in realtime. The other way I think is having the chars animated, similar to a twister. Though, im thinking each angle is used for lookup table. I just dont seem to get it right in my mind to start coding on this effect. I've seen several early cracktros and demos that does this very fast, but haven't had the time to reverse-engineer the binaries. If you have any tips and info i'd appreciate it, or even better; write an explanation for codebase.
Thanks

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2020-01-21 21:30

Scan

Registered: Dec 2015
Posts: 110

Quoting zscs

In 1993, I was keen of trying to copy other's stuff by my own and created a kind of realtime DYPP in Attempt one. File "2...SCROLLDYPPER" PRG<

I think it looks really nice, but I can't stop wondering how DYPPER would be pronounced. ;)

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