GameHut, just a simple question. You keep on mentioning the boss's screen rotation. How was it done? Thanks!
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No one You know
Dec 05, 2017
Nevr
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No one You know
Dec 05, 2017
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No one You know
Dec 05, 2017
, . .
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Aqua the Yoshi
Nov 12, 2017
MuteKi it would be sick if SEGA decided to use that on Sonic to make inbetween frames of his rotation when going through loops
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Boyfinn
Nov 11, 2017
I have my own demo of this effect somewhere that i wrote in C with SGDK a while ago.
I'll post the ROM here if i can find it.
In addition to Vectorman, Batman&Robin and alien soldier, i've also seen this effect used very recently in the Overdrive demo and Alko's "Satan Ball" game https://media.giphy.com/media/l3978usXXBk93TYly/giphy.gif
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muteKi
Nov 09, 2017
Yeah, the columns are all on the 8x8 tile boundaries; while horizontal pixel shearing could occur on any row, the vertical shearing has to occur between tiles, due to the way data lookup works for the VDP. I don't know everything about it, but I know a dude who actually built a Sonic 1 mod that uses the effect to try to create a rotation effect that's fairly plausible up to about 45 degrees or so.
It does look like the ship is broken into columns that move more the further away they are from the center. I wonder how well the Genesis supported 2D matrix transformations.
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Aqua the Yoshi
Nov 06, 2017
makes sense. I haven't noticed it, but it's been a while since I've seen it, so that may be why.
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H P J
Nov 06, 2017
Yeah, that explains why it doesn't rotate much in-game. I thought that was how it was done, since there is quite a large amount of the lines of pixels desynching with each other as it moves.
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Boyfinn
Nov 06, 2017
I'm pretty sure it's what's mentioned above, horizontal line scrolling with vertical tile scrolling on top. This method however can't reproduce full 360 degree rotation, as when rotating more than about +- 20 degrees makes the object all skewed
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Aqua the Yoshi
Nov 06, 2017
Doesn't sound unlikely, and it also sounds like a video to be made possibly. Because normally I'd think with the individual columns that it would just be skewing.
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leonid.golenkov
Nov 05, 2017
i guess ship rotation was done using vertical scrolling technique - video display processor of mega drive can vertically scroll individual columns that are 2 tiles / 16 pixels wide individually
Nevr
, . .
MuteKi it would be sick if SEGA decided to use that on Sonic to make inbetween frames of his rotation when going through loops
I have my own demo of this effect somewhere that i wrote in C with SGDK a while ago.
I'll post the ROM here if i can find it.
In addition to Vectorman, Batman&Robin and alien soldier, i've also seen this effect used very recently in the Overdrive demo and Alko's "Satan Ball" game https://media.giphy.com/media/l3978usXXBk93TYly/giphy.gif
Yeah, the columns are all on the 8x8 tile boundaries; while horizontal pixel shearing could occur on any row, the vertical shearing has to occur between tiles, due to the way data lookup works for the VDP. I don't know everything about it, but I know a dude who actually built a Sonic 1 mod that uses the effect to try to create a rotation effect that's fairly plausible up to about 45 degrees or so.
https://www.youtube.com/watch?v=un3_xNtSkXE motion sickness warning
It does look like the ship is broken into columns that move more the further away they are from the center. I wonder how well the Genesis supported 2D matrix transformations.
makes sense. I haven't noticed it, but it's been a while since I've seen it, so that may be why.
Yeah, that explains why it doesn't rotate much in-game. I thought that was how it was done, since there is quite a large amount of the lines of pixels desynching with each other as it moves.
I'm pretty sure it's what's mentioned above, horizontal line scrolling with vertical tile scrolling on top. This method however can't reproduce full 360 degree rotation, as when rotating more than about +- 20 degrees makes the object all skewed
Doesn't sound unlikely, and it also sounds like a video to be made possibly. Because normally I'd think with the individual columns that it would just be skewing.
i guess ship rotation was done using vertical scrolling technique - video display processor of mega drive can vertically scroll individual columns that are 2 tiles / 16 pixels wide individually