SpiceWare's Blog

I hope you can get it to work. The effect looks really good. If you can get by with fewer than 8-bits of drawing then you can do the shift on alternating scanlines and shift the bit pattern instead on every frame. The end result is still a diagonal line.

 

XX00111111
X00111111 < SHIFT
X01111110 --bit pattern changes
01111110 < SHIFT

Having slept I may have come up with something. The routines are still drawing the missiles and the ball due to the fireball color cycling. If the cycling doesn't happen while the dragon is on screen then I can eliminate 2 of them. That'll save 12 cycles which might be enough.

 

The drawing every other but shifting every line may help too - thanx for the suggestion! I'll see what the fireballs savings do first, and if that doesn't help I'll check with Nathan to see if that would be a restriction he could work around when designing the dragon sprites.