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Therican
screenshot added by Slumgud on 2024-10-06 17:57:34
platform :
type :
release date : october 2024
release party : Deadline (Berlin) 2024
compo : oldskool demo
ranked : 6th
  • 22
  • 3
  • 0
popularity : 56%
 56%
  • 0.88
alltime top: #10659
added on the 2024-10-06 17:57:34 by Slumgud Slumgud

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good glitch galore
rulez added on the 2024-10-06 18:51:10 by Virgill Virgill
Must obey the Glitch, must thumb up those explorations in HAM land
rulez added on the 2024-10-06 18:55:55 by Z3k Z3k
Really cool! Evil turbotape
rulez added on the 2024-10-06 20:00:59 by rloaderro rloaderro
Nice HAM stuffs and glitches
rulez added on the 2024-10-06 20:07:55 by ok3anos ok3anos
Great and different as always.
rulez added on the 2024-10-06 20:31:30 by Depeche Depeche
Weird and glitchy, enjoyed this a lot.
rulez added on the 2024-10-06 20:41:36 by break break
Weird and glitchy, enjoyed this a lot.
rulez added on the 2024-10-06 20:45:38 by bifat bifat
RAW!!! Lefts Paula humming when it ends ...but maybe that's just another glitch.
rulez added on the 2024-10-06 23:15:04 by la_mettrie la_mettrie
Weird. Glitchy. Enjoyable.
rulez added on the 2024-10-06 23:19:05 by ham ham
This was fun. :)
rulez added on the 2024-10-07 13:40:51 by Zavie Zavie
for keeping it weird!
rulez added on the 2024-10-07 15:49:40 by chavez chavez
Very cool!
rulez added on the 2024-10-07 19:44:22 by bodo^rab bodo^rab
Cool!
rulez added on the 2024-10-07 20:09:36 by Olympian Olympian
quadrobic thumb
rulez added on the 2024-10-07 20:49:21 by wbcbz7 wbcbz7
Hi! Extra power-up for all here and thanks for the feedback! Investigations
on noise and glitches must commence! This 'Ham7' was a new realm for me.
I had heard about it some 3-4 years ago, but it took for a while to get
some other projects out of the way.

Before the Therican, there was an experimental period of roughly half a year.
I tested out how to dither 12bit palette 'Ham7' colours so, that as many
colours could accessed with as few planes on the screen as possible. Therican
uses only 2 bitplanes (4+2 and 3+1). Instead of Revision-style 320x180 screen
size, I wanted to have the entire screen in use with size approximately
352x270. This also caused some issues. The hardware scrolling + sprites +
overscan ... Is not easy to get it right, especially if your daily driver is
(still) an outdated fs-uae or such.

Some of the experiments resulted into "dual-scanline-dithering" and into
a vague resolution of 2x2 with extra traits. The HAM artefacts increase the
resolution. All 352 pixels on each scanline are accessable. Blitting a bob
into odd or even X or Y coordinate causes a different colour variation of
the bob for free. This way the red component can be used as green and so on.

Currently three different import methods exist for this mode. The actual
amount of different colours on the screen never really exceeds 32. Still,
the human eye appears to blend colours into some other perceptive colour.
Not a new thing in demoscene, no, not at all, but still interesting to play
with. And we can always take a look at the 1800's impressionists and other
colour geniouses in further history.

The dithering can form about 128 different "colours" by using 2+2+2+2 bits
on 2 by 2 area. This resulted into a fixed palette which has 4 steps of
RED, 4 steps of GREEN and 8 steps of BLUE. After browsing through hundreds
of different ways to use BPL5DAT and BPL6DAT words by changing them on each
scanline, a few good values were found with my tired eyes.

The effects in this production were put together very quickly. I'm merely
scratching the unlocking system of the surface, so to speak. Personally, I
wish everyone a good and exciting journey with 'Ham7'. During the way I
already got some ideas for better effects.

And yes, the animations and logo were drawn by hand. First in GIMP and then
in my own pixel editing tool which has all the exporters for new formats. 9
frames for the Tin-can man and other 9 frames for the "cyborg therian" with
a fancy tail.

For 'Ham7' I could see some game-dev potential. Good issue is also
whether AGA machines could also display 'Ham7' or maybe even benefit
from similar solutions. Fun thing is that the 'mode' used can display
huge blitter-objects on the screen. Therican has 10 bobs in size of 64x74.
This could be even more, because your blitter feels very strong again,
even on an overscan screen!

About the sound. First part is obviously just some audio DMA-noise for Cinter
rendering samples on the background. This entry was my first actual use case
of Cinter. It is a very interesting player which feels like half of it is in
some invisible form! We first had a plan to make just 4K intro. After a week
I was sure I can fit everything into 8K. And ... well yeah. Then came 16K and
finally the size actually exceeded 32K with 84 bytes.

For the fun of artificial size limitations, on the Deadline party friday,
I posted a very hard question on Zymosis Boozing Society TG channel: "How
to get rid of 84 bytes?"

Thanks to Saviour, the same question was also seen on the CSDB forums.
Answer to such a broad question might get really puzzling. In my case the
final solution was to simplify the code without breaking it and removing
some shades from the logo. Earlier logo did look better.

Thanks to Slummy for some practical info about using Cinter.

Also for this production, I'm using my own home-brew basic-like language.
It has a compiler for 68000. This is all still unreleased, because a lot
of testing and patience is still needed. I will return to this subject
some day.

Blackwine commented at the party, that 32K intros don't exist and they
will fall into 40K intro category. This is true, but I simply didn't have
enough time to gather some 8Kb of Shrinklered party reports to be included
into the end of the production. Perhaps next time!

Thanks to Bifat for many test runs on the real harware. I'm now convinced
that I need to get a network card on my Amiga 500 as well. It's not
luxury, it's just a way to improve noise and glitches to the max!

Oh, only one complaint about the Deadline party place. The whole place is
really awesome, but the big screen was located too low. If you display
something on the lower border, this can't be seen from a distance. Well.
It was crowded this year, wasn't it?

On the ADF there's some ASCII goodies created by Allanon/Depth.
Greetings back for all! Party ON! (Alt-party starts in a few days. This time,
I live just around the corner...)

Greippi (8.10.2024 HKI)
added on the 2024-10-08 12:20:27 by Greippi Greippi
Very nice, chilled down weird vibe which I very much enjoyed
rulez added on the 2024-10-08 17:54:57 by darya darya
Loved the glitchy goodness, and this really got me thinking about different ways to use the HAM7 mode. Thanks for the write-up!

For AGA support, what I've done is detect it and use real bitplane data for bpls 5 and 6. Hopefully on the faster machines you don't need the free DMA.
rulez added on the 2024-10-08 19:05:34 by gigabates gigabates
Incredible tech and atmosphere in this release. So unique!
rulez added on the 2024-10-09 13:24:21 by Motion Motion
Offbeat'ish entertainment as usual. Thanks a lot for the complementing
background information. Highly appreciated!
rulez added on the 2024-10-09 14:31:04 by ROG_VF ROG_VF
Not sure, otherwise it looks kinda nice but ouch my eyes somehow.
added on the 2024-10-09 14:45:05 by leGend leGend
Quote:
weird
rulez added on the 2024-10-11 20:16:07 by SiR SiR
Original!
rulez added on the 2024-10-12 19:31:57 by magic magic
thanks for the writeup! I enjoyed the lost media vibe a lot!
rulez added on the 2024-10-14 21:50:23 by v3nom v3nom
Thanks for bringing more glitches to the Amiga!
rulez added on the 2024-10-24 01:04:42 by KONEY KONEY
ok
added on the 2024-11-08 17:48:13 by Frequent Frequent

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