Hornpipe2's Blog

Looks good! Nice looking fighters.

 

So they are flickering, right?

Would this be a case where flicker could be done every other scanline, instead of the entire object every other frame?

Looks good! Nice looking fighters.

 

So they are flickering, right?

Thanks! I'm not much of an artist so this was the best I could do...

 

Yeah, they flicker at 30hz. I turned on "Use Phosphor" with amount 77 in Stella to capture this image.

Would this be a case where flicker could be done every other scanline, instead of the entire object every other frame?

Unfortunately, I don't see a way that would work. My display kernel is pretty tight as-is and I think situations where the sprites are very close or very far apart would break it. It would be really awesome though!

Looks nice Hornpipe. Keep up the good work.

 

Looks good! Nice looking fighters.

 

So they are flickering, right?

Thanks! I'm not much of an artist so this was the best I could do...

 

Yeah, they flicker at 30hz. I turned on "Use Phosphor" with amount 77 in Stella to capture this image.

TROGDOR smacks himself in the head with his big beefy arm.

 

I've been using Stella for over a year now, and I didn't even know that feature existed. No more hand editing screen shots for me!

Unfortunately, I don't see a way that would work. My display kernel is pretty tight as-is and I think situations where the sprites are very close or very far apart would break it. It would be really awesome though!

 

Having two freely-mobile 40 pixel players with flicker-blinds would be tough. If the players were 24 pixels wide instead that might make things a lot easier. In that case, each scan line would have one "single" sprite and one "double". Thus, there would only need to be one write performed during the scan line. I'm not sure how many different versions of the code would be required to deal with the need to hit HMOVE at about the same spot each line. That would be a complicating factor.

 

If both players were 32 pixels wide, then both would have to be written during the visible part of the line. Every possible scenario could be handled with code (sometimes using VDEL, sometimes not) but I can't think of any way for practical code to allow much mobility.

 

If you didn't mind having a couple of vertical stripes running down the two human characters, and if you didn't mind limiting motion to 3-pixel increments, it would probably be possible to show two 31-pixel-wide players on alternating scan lines with no flicker. Not sure if that would be useful or not.