Triple playfield in Rotator game? example attached..

mateusz_s · 31 January 2020, 16:27

Hi,
How this effect is achieved? I mean the triple playfield. There are options in Blitz for Dual Playfield. The lat plane is the rainbow, the middle is the jungle and the first plane are blocks.

Of course there are lots of games with this effect, but this one is new Rotator: [ Show youtube player ]

Daedalus · 31 January 2020, 18:11

This looks like it's just a dual playfield with a copper effect in the background. Pretty simple to do - Blitz lets you easily add copper effects like that to a background using the Display Library.

Basically, it's not a playfield, rather a single colour that the copper updates every line to give a rainbow effect.

timg · 05 March 2020, 10:33

Hi Mateus,

I'm the Dev of Rotator, Daedalus is correct, it's a dual playfield with a copper effect to generate the rainbow behind.

rothers · 05 March 2020, 11:39

A triple playfield is possible though with clever programming, I'm thinking about Agony.

[ Show youtube player ]

I do remember figuring this out with an action reply, is it only updating half the colours and flipping 2 pages really fast or something like that?

Antiriad_UK · 05 March 2020, 12:48

Detailed explanation of Agony here.
https://codetapper.com/amiga/sprite-tricks/agony/

saimon69 · 06 March 2020, 00:44

There was also an article on Frank Sauer website that shows more visually the copperlists

saimon69 · 06 March 2020, 00:45

Did not Cool Spot uses a similar trick for its own parallax (but 4+2 software planes at 17FPS ?)

rothers · 06 March 2020, 13:13

Quote:

Originally Posted by saimon69

Did not Cool Spot uses a similar trick for its own parallax (but 4+2 software planes at 17FPS ?)

Oh wow I've just looked at that and the whole game made me feel a bit sick, it's horrible, what a weird engine.

31 January 2020, 16:27	#1
mateusz_s Registered User Join Date: Jan 2020 Location: Poland Posts: 181	Triple playfield in Rotator game? example attached.. Hi, How this effect is achieved? I mean the triple playfield. There are options in Blitz for Dual Playfield. The lat plane is the rainbow, the middle is the jungle and the first plane are blocks. Of course there are lots of games with this effect, but this one is new Rotator: [ Show youtube player ]

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31 January 2020, 18:11	#2
Daedalus Registered User Join Date: Jun 2009 Location: Dublin, then Glasgow Posts: 6,348	This looks like it's just a dual playfield with a copper effect in the background. Pretty simple to do - Blitz lets you easily add copper effects like that to a background using the Display Library. Basically, it's not a playfield, rather a single colour that the copper updates every line to give a rainbow effect.

05 March 2020, 10:33	#3
timg Registered User Join Date: Jan 2020 Location: Saltash Posts: 27	Hi Mateus, I'm the Dev of Rotator, Daedalus is correct, it's a dual playfield with a copper effect to generate the rainbow behind.

05 March 2020, 11:39	#4
rothers Registered User Join Date: Apr 2018 Location: UK Posts: 487	A triple playfield is possible though with clever programming, I'm thinking about Agony. [ Show youtube player ] I do remember figuring this out with an action reply, is it only updating half the colours and flipping 2 pages really fast or something like that?

05 March 2020, 12:48	#5
Antiriad_UK OCS forever! Join Date: Mar 2019 Location: Birmingham, UK Posts: 418	Detailed explanation of Agony here. https://codetapper.com/amiga/sprite-tricks/agony/

06 March 2020, 00:44	#6
saimon69 J.M.D - Bedroom Musician Join Date: Apr 2014 Location: los angeles,ca Posts: 3,531	There was also an article on Frank Sauer website that shows more visually the copperlists

06 March 2020, 00:45	#7
saimon69 J.M.D - Bedroom Musician Join Date: Apr 2014 Location: los angeles,ca Posts: 3,531	Did not Cool Spot uses a similar trick for its own parallax (but 4+2 software planes at 17FPS ?)

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