Requested: Chunky Copper Tutorial

[Antiriad_UK]

I really like the look of that britelite.

I fear it may be beyond me though. I just found a few threads on ADA talking about this kind of thing:

http://ada.untergrund.net/?p=boardthread&id=442
http://ada.untergrund.net/?p=boardthread&id=217&page=0

And I'm like "wtf is this sourcery". Will have to investigate more.

[mr.spiv]

Ok.. this is not "copper chunky" anymore but as the cp2 got mentioned [ Show youtube player ] is done so that one can just write bytes in form %0000xxxx (linear buffer) to mem. While doing this the blitter does, was it, 2-phase irq chained c2p over the previous buffer and third buffer being displayed.. The filling of "pixel" is done using blitter fill or something like that equally kinky (the original routine is 26 years old so hard to remember details). If the code runs in Fast then full screen at 50Hz was easy peasy on A500.. here I recall the screen is 224x256 due code being in Chip as well.

[dodke]

Originally Posted by mr.spiv

Riihimäki! wtf?!

I used to live there at the time!

[mr.spiv]

Originally Posted by dodke

I used to live there at the time!

Come back. This place is the intellectual pole of the world.

[ross]

Somewhere not so distant North-Est of Riihimäki, exactly 8 years ago.
It was already damn cold!



No copper chunky code used for this image

[Seoman]

Originally Posted by britelite

Well, maybe I should post one of my copper-chunky demos too

[ Show youtube player ]

Hey Britelite, how is this effect done? (min 1:00)

[ Show youtube player ]

Maybe a box blur algorithm?

[DanScott]

Originally Posted by Seoman

Maybe a box blur algorithm?

Looks like a variation on an atan tunnel without perspective

[britelite]

Originally Posted by Seoman

Hey Britelite, how is this effect done? (min 1:00)

[ Show youtube player ]

Maybe a box blur algorithm?

Pretty much like DanScott already said, it just a sinewave-generated textured mapped onto a radial offset map.