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Xenox
Registered: Jun 2003
Posts: 87 |
Datastorm Demo effects - awesome!
I'm really shocked about the very good quality of the demos released at the Datastorm2014, really, really great stuff, the gfx are amazing with very good code and music...!
I really, really, like the bg Datastorm bitmap picture in "We are all connected" at the beginning...
My question is, how do they do that moving the bitmaps... i'm really impressed...!
We Are All Connected
Frank |
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Conrad
Registered: Nov 2006
Posts: 849 |
Just a guess but... VSP? |
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CRT
Registered: Oct 2012
Posts: 87 |
With double buffering and slow scrolling it's possible without VSP. |
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Scarzix
Registered: Aug 2010
Posts: 143 |
There was no VSP in our demo. :-) Perplex made the scroller. |
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JackAsser
Registered: Jun 2002
Posts: 2014 |
xenon: the power of lda+sta will give you scrolling, or if you're Mahoney, 44.1kHz samples. ;) |
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algorithm
Registered: May 2002
Posts: 705 |
you should be able to soft-scroll the whole screen in around 4 cycles with lda/sta which would be the equivalant of around 2 pixels hardware scroll per frame. If you need more cpu time for other things, then 1 pixel scroll per frame should be much more than sufficient. |
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algorithm
Registered: May 2002
Posts: 705 |
4 cycles?? Hahaah I wish... Meant 4 frames! |
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Cruzer
Registered: Dec 2001
Posts: 1048 |
Yeah, bitmap scrolling is definitely a new and revolutionary thing invented in 2014. :P |
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Xenox
Registered: Jun 2003
Posts: 87 |
Aeh, really? lda, sta? Hm, well, i remember that i used a fucking reat 4x4 charset from Compyx/Focus in a Intro years ago (Intro #19) using lda, sta to move the bitmap, but the routine eats the rastertime, so i'm not sure if this is working on a whole screen...! Doublescreen is a good idea...!
Frank |
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Perplex
Registered: Feb 2009
Posts: 255 |
Quoting algorithmIf you need more cpu time for other things, then 1 pixel scroll per frame should be much more than sufficient.
Unless you want to do loading, decrunching and perhaps some other stuff at the same time, of course. |
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cg
Registered: Mar 2013
Posts: 2 |
Quote: xenon: the power of lda+sta will give you scrolling, or if you're Mahoney, 44.1kHz samples. ;)
lda+sta is the most versatile thing ever invented - any category ;) |
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