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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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Digger
Registered: Mar 2005
Posts: 437 |
A neat example of a char based DYPP can be found in Obornik (coded by Brush). |
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Rudi
Account closed
Registered: May 2010
Posts: 125 |
Digger: nice. yes, the sine-scroll in that demo is a good example of what i want to learn how is done. |
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Rudi
Account closed
Registered: May 2010
Posts: 125 |
Ok, I forgot to turn of invite on the channel. I wanted to keep the lamers out. If you are irc user, Pls (auto)join #c64coders (ircnet) if you want hang on a pure coders channel. Thx |
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ChristopherJam
Registered: Aug 2004
Posts: 1409 |
Does anyone know which production holds the area record for freeform DYPP? (ie, not relying heavily on solid 8x8s in the source) |
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Axis/Oxyron
Account closed
Registered: Apr 2007
Posts: 91 |
There exists an old, but pretty good DYPP based on VSP in Anal Intruder. And AFAIK the best completely dynamic DYPP is in Mekanix. |
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chatGPZ
Registered: Dec 2001
Posts: 11386 |
Quote:are you sure this is the same as DYPP?
i have no idea what "DYPP" should be exactly, and how its different from DYSP, to be honest :=) |
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HCL
Registered: Feb 2003
Posts: 728 |
I'm afraid we're going off-topic here, but to me a DYSP means Different Y SideborderSprite Position, which is quite far from a DYPP. |
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chatGPZ
Registered: Dec 2001
Posts: 11386 |
sideborder? that doesnt match what i remember at all, DYSP is just a sine scroller with sprites. some tutorial (its also on codebase iirc) even makes a DYSP from just 8 sprites without any multiplexing :)
(and this is, why starting a discussion with references to those totally well defined abrevations makes no sense at all ... =P) |
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Dano
Registered: Jul 2004
Posts: 234 |
DYPP is just a pixelwide DYCP.
Wasn't it Different Yyielding Pixel Position? |
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Shadow
Account closed
Registered: Apr 2002
Posts: 355 |
I think the old definition of DYSP was Different Y Sprite Position, ie. when you had a routine that could have open sideborder and move sprites in Y.
DYCP = Different Y Character Position (ie. a since scroller where each character could move in y)
DYPP = Different Y Pixel Position (ie. a since scroller where every horizontal pixel of the character could move in y)
Ah, the good old days when every effect had to have a name! :) |
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