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Twynn
Account closed
Registered: Nov 2005
Posts: 9 |
Half pixel shifting
First of all: It's good to see that the C64-scene is still alive.
I kinda left the scene about ten years ago but after accidently crossing this site I got interested a bit again. Downloaded some demo's to see what happened since I left and I was quite amazed. Not those ugly 8x8 modes anymore, but good looking demos.
Anyway, when I was watching krestage I saw this intro for each demopart which used this high-resolution text which is said to use half pixel shifting? I'm still familiar with the normal vic-tricks, but this one made me curious.
Now I wonder how this is done. Is it just a visual trick or has the vic really some possibility to do half pixel movements or something? |
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Radiant
Registered: Sep 2004
Posts: 639 |
Quote:
Well, actually FLI is also not an undocumeted feature. Just normal vic-usage. It's just that someone has to think about it and realize what is possible. And maybe cruzer has also thought about something and worked it out.
Badline at will sure is undocumented, no? I haven't read any official VIC-II specs, but I don't think they'd include such hacks... |
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Cruzer
Registered: Dec 2001
Posts: 1048 |
Quote: Well, there certainly are some effects left to discover, but you'd be hard pressed to uncover more undocumented features like FLD, FLI, sprite stretching etc.
What is a "feature" anyway? Is FLI really an undocumented VIC-feature, when the processor has to be involved at every line? All the VIC chip does is just updating the bitmap colors whenever there is a badline, like it always does in bitmap mode.
Guess we could discuss what a "feature" is for ages (there was a thread like that some time ago) but I don't really think it's that interesting.
What really counts is what appears on the screen, and there's definitely lots of effects left to do, which rely more or less on VIC-trickery, including improvements of existing tricks, and even stuff that some might say would qualify for a new feature/gfx mode/etc. |
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algorithm
Registered: May 2002
Posts: 705 |
Give us a clue.., new graphic modes, etc etc |
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