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JackAsser
Registered: Jun 2002
Posts: 1990 |
Impossaball for C64
Was Impossaball ever converted to C64?
CPC: http://www.youtube.com/watch?v=IPcHyG4S-q4
Speccy: http://www.youtube.com/watch?v=ey5VbkSBSjA
If not, then someone should do it.... (not me)
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Skate
Registered: Jul 2003
Posts: 491 |
I wanted to write this message to be a part of Crossbow's new product if he accepts the challenge. I want to be famous!!! ;)
remember this?
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Oswald
Registered: Apr 2002
Posts: 5025 |
Quote: It's running at 12 fps since the CPC and Speccy are limited to rendering both the background and objects in bitmap mode. On the C64 the checkerboard is very cheap, ~1500 cycles gives you 7 x-expanded sprites multiplexed, with d021 for color. One sprite is free for the ball, and rendering ~15 objects is challenging but not impossible.
I dont see why the checkerboard would be cheap? You can animate it at best, raster tricks wont do hence you have to plot bobs in there. Then each object is made of 2 colors B/W in hires, so you need 2 HW sprites to make up for 1 Software, since d021 color wont come trough without ANDing the background manually. also good luck masking the software sprites in with the HW ones, best bet is to only use HW sprites as top prio objects, but then not many top priority bobs are there.
unless the cpc&speccy version is not optimized to the max, the c64 cant match that speed. if the z80 code is somewhat sloppy, then there's a chance. Prerolled sprite & mask data and unrolled bob plotters might do the trick then. Anyhow remember the reflex demo & arcanum with 3d bobs its slow as fuck with some 32 soft sprites where this game displays a checkerboard aswell, and bigger sprites. |
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MagerValp
Registered: Dec 2001
Posts: 1059 |
Quoting OswaldI dont see why the checkerboard would be cheap? You can animate it at best, raster tricks wont do hence you have to plot bobs in there.
Do the checkerboard as a sprite underlay, plot bobs on top in char mode.
Quote:Then each object is made of 2 colors B/W in hires
I'd use multicolor on the C64 instead.
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Flavioweb
Registered: Nov 2011
Posts: 447 |
Quote: Quoting OswaldI dont see why the checkerboard would be cheap? You can animate it at best, raster tricks wont do hence you have to plot bobs in there.
Do the checkerboard as a sprite underlay, plot bobs on top in char mode.
Quote:Then each object is made of 2 colors B/W in hires
I'd use multicolor on the C64 instead.
How you think to manage the parallax effect between bobs?
You can put they over chessboards sprites but then? There are free cycles to draw all in real time? |
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chatGPZ
Registered: Dec 2001
Posts: 11140 |
looks very doable to me. i'd probably do the chessboard in charset though, and then the objects using sprites - seems easier to me. |
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Oswald
Registered: Apr 2002
Posts: 5025 |
and how do you mask in bobs 'between' sprites and chessboard? the c64 hw just cant help enough. |
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chatGPZ
Registered: Dec 2001
Posts: 11140 |
that would be pretty much the only thing you need to do in realtime then.... a bit of masking. again, very doable. |
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Oswald
Registered: Apr 2002
Posts: 5025 |
a bit of masking, so need to draw software bobs? or to calculate the mask needed to plot bobs under sprites? no need to erase bobs from the charset chessboard right? just change d018? pfffft :) |
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chatGPZ
Registered: Dec 2001
Posts: 11140 |
you should think outside your 4x4 math box a bit =P there are infact some games doing it (most prominent example is zakmckrakken i guess). |
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JackAsser
Registered: Jun 2002
Posts: 1990 |
Quote: you should think outside your 4x4 math box a bit =P there are infact some games doing it (most prominent example is zakmckrakken i guess).
Pinball Dreams, Spindizzy, all those isometric speccy conversions etc.
It's is almost sufficient to mask in the x-direction only to have a descent looking game in this case. And doing that unrolled or even have each image pre masked is quite viable.
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