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Re: Shadow Gangs (NeoGeo), scrolling issue going right only.
11/10/23 04:51 PM
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> Hi; > > I am trying to port my game Shadow Gangs to the NeoGeo, I got now to the point where > I can start polishing and optimizing the game. > I get a glitch on the background scrolls, when the character is moving right, and not > when he is moving left. > > Video bellow shows the issue. > > https://www.youtube.com/watch?v=ihFIA4oDINM > > On Mame, the glitch is still there, but instead of a empty vertical line, it's like > white or black small dots or rectangles all over the screen. > > -It doesn't happen when moving left on both GNGEO and Mame. > +Doesn't happen also when the framerate is 60 fps. > -Doesn't happen when Idle, only when moving. > -Also, If wait for 2 or 3 Vsyncs or more, it doesn't happen. (But then the game is > then very slow) > > I am not using sticky, and I put the sprites on the correct X position. > > The thing that I don't understand, is that it happens only when moving right, not > left... > > Do you guys have an idea what the issue might be? > > Thank you for any insight and help.
When are you updating your spritelist? it looks almost like you're doing it mid-frame and getting some sprites from one frame and some sprites from the next on certain lines
maybe there's more processing going on when moving right?
I might be able to find time to work with you and debug the issue if you need closer analysis.
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