[WIP] Galaga conversion - Page 3

saimon69 · 16 June 2024, 01:59

This is so darn good so far!

Marconelly · 17 June 2024, 23:56

This is looking beautiful! Is the footage from A1200? What are your current performance expectations?

jotd · 18 June 2024, 07:33

ATM this is running on ECS winuae at 50 fps but it needs a lot of optimizing even to run at 25 fps with cycle exact.

There are a lot of small BOBs to draw, which takes a lot of time. But the BOBs are 3 color + black, and mainly either bees (blue/yellow) or moths (red). So, by picking palette indexes carefully (colors 1,2,3 and 4,8,12), it's possible to use half the current blits (2 bitplanes per alien instead of 4 bitplanes), because most aliens only use 2 bitplanes. I'll try that soon.

Apart from that, the game is really doing well. Ship capture & double ship features are now working, so the logic of the game is nearly 100%.

Marconelly · 18 June 2024, 19:49

Quote:

Originally Posted by jotd

There are a lot of small BOBs to draw, which takes a lot of time. But the BOBs are 3 color + black, and mainly either bees (blue/yellow) or moths (red). So, by picking palette indexes carefully (colors 1,2,3 and 4,8,12), it's possible to use half the current blits (2 bitplanes per alien instead of 4 bitplanes), because most aliens only use 2 bitplanes. I'll try that soon.

Yes, that should help a ton. Fingers crossed you get it working at 25FPS on regular A500 (and hopefully player ship movement could be pulled off at 50FPS)

jotd · 18 June 2024, 23:06

I could use 2 bitplanes instead of 3 only for bees and moths, and also bosses (when they're it).
Not enough for 50 fps but it saves a lot of bandwidth for the same visuals!

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16 June 2024, 01:59	#41
saimon69 J.M.D - Bedroom Musician Join Date: Apr 2014 Location: los angeles,ca Posts: 3,596	This is so darn good so far!

17 June 2024, 23:56	#42
Marconelly Registered User Join Date: Feb 2024 Location: Canada Posts: 42	This is looking beautiful! Is the footage from A1200? What are your current performance expectations?

18 June 2024, 07:33	#43
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,369	ATM this is running on ECS winuae at 50 fps but it needs a lot of optimizing even to run at 25 fps with cycle exact. There are a lot of small BOBs to draw, which takes a lot of time. But the BOBs are 3 color + black, and mainly either bees (blue/yellow) or moths (red). So, by picking palette indexes carefully (colors 1,2,3 and 4,8,12), it's possible to use half the current blits (2 bitplanes per alien instead of 4 bitplanes), because most aliens only use 2 bitplanes. I'll try that soon. Apart from that, the game is really doing well. Ship capture & double ship features are now working, so the logic of the game is nearly 100%.

18 June 2024, 23:06	#45
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,369	I could use 2 bitplanes instead of 3 only for bees and moths, and also bosses (when they're it). Not enough for 50 fps but it saves a lot of bandwidth for the same visuals!

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