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#61 |
Zone Friend
Join Date: Jun 2006
Location: Gargore
Age: 44
Posts: 17,789
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I saw today demo which I thought was not possible on Amiga 500 - Siesta by Axis: http://bitworld.bitfellas.org/demo.php?id=10983 So even after all these years you can not be sure.
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#62 |
Zone Friend
Join Date: Jun 2006
Location: Gargore
Age: 44
Posts: 17,789
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video of Siesta
[ Show youtube player ]
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#63 |
Registered User
Join Date: Feb 2007
Location: Melbourne, Australia
Age: 41
Posts: 3,773
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Why did you think it's not possible? Not many colours are used.
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#64 |
Zone Friend
Join Date: Jun 2006
Location: Gargore
Age: 44
Posts: 17,789
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I never saw similar demo for A500. Maybe some effects are just some color cycling tricks.
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#65 |
move.l #$c0ff33,throat
Join Date: Dec 2005
Location: Berlin/Joymoney
Posts: 6,863
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This is heavily inspired by Darkroom which was coded by Dweezil. The effects are quite cool for 68000/A500, there sure as hell is no color cycling used here! Good intro by Stelios (RIP!) as usual.
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#66 |
Zone Friend
Join Date: Jan 2006
Location: Aussie
Posts: 1,144
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#67 |
noodle
Join Date: Jun 2007
Location: europe
Posts: 247
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by now, I found 3 or 4 intros on bitworld with that kind of sine scroller.
blue velvet pack menu/tech another intro/the gang Xion Intro/Cycron edit: 1989 collection intro/Cryptoburners New Stuff/Abnormal Dolly Mixture #9 Pack intro / Anarchy - Dizzy Dream 14 intro/anarchy eddie's return/laser dance Malzbier Trinker/Paranoid New Import/sector 4 (no sinescroll : space harrier/traitor, silents acid syndrome) the rasterbars effect has been done to death on Amiga but not really with this kind of gradients ? I don't remember ever seen it. some examples ? the starfield could be done precalc bob smaller to larger with a copper mirror effect for the second middle of screen (dual playfield ?). do you know intros with this kind of starfield (perhaps less stars) ? Last edited by heavy; 10 February 2017 at 10:40. |
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#68 |
Lemon. / Core Design
Join Date: Mar 2016
Location: Tier 5
Posts: 1,213
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Well.. it was done...
[ Show youtube player ] |
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#69 |
Thalion Webshrine
Join Date: Jan 2004
Location: Oxford
Posts: 14,460
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Thats cool. I wonder if the inspiration really was this thread?
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#70 |
Computer Nerd
Join Date: Sep 2007
Location: Rotterdam/Netherlands
Age: 48
Posts: 3,839
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#71 |
Registered User
Join Date: Apr 2018
Location: UK
Posts: 490
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edit: Lol I spoke too soon, didn't see Dan's post.
Nice work. |
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#72 |
Registered Abuser
Join Date: Oct 2013
Location: Valencia / Spain
Posts: 363
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#73 |
Registered User
Join Date: Dec 2018
Location: Earth
Posts: 1,081
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Just Curious.
What Specs needed the PC to run this Demo ? Last edited by Torti-the-Smurf; 11 June 2024 at 14:22. Reason: Deleted the YT Link, becuase i linked the wrong video |
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#74 |
Registered User
Join Date: Apr 2023
Location: "Hamcastle"
Posts: 23
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Very interesting and decent piece of code by Mrs Beanbag (catchword: sine scroll). I definitely learned something; I tried to comprehend the minterm but was unable to make head or tail of it until I noticed that chA and not chC is set to destination address. Stupid me!
Pseudo 3D stars could be used to get a high number of moving stars per frame since they don't need costy 'divs z' or 'muls 1/z' operations. And copper jumps could be used for the color gradient bars and their cycling, couldn't they? |
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#75 |
Registered User
Join Date: Oct 2011
Location: Southampton, UK
Posts: 38
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I just came to update you all but of course it's already been done! I too wondered if this thread was the inspiration since the original thing seemed pretty obscure. Anyway, love this new one!
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#76 |
Moderator
Join Date: Nov 2004
Location: Eksjö / Sweden
Posts: 5,652
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It is similar to original "not possible" post. If you pre-render and just switch buffer pointers, all is possible, and platform doesn't really matter.
I.e. stars are anim and this frees up the rest of the machine to do a standard sine scroll. Sine scroll record = Blu Sky, still. Smooth horizontal copper bars are certainly possible on OCS if they are continuously moving in one direction. The blending effect was shown in Atomix cracktro 1990, where the blend appears as a twist even. And the rest of it takes half a scanline by bitplane interference! This is no criticism, new ideas are good. The first time and maybe the second. ![]() |
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#77 |
Registered User
Join Date: Apr 2023
Location: "Hamcastle"
Posts: 23
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Just want to say that Mrs Beanbag's idea for a sine scroller works like a charm - and it is pretty fast :-)
![]() Source code can be found here: https://flashtro.com/rog-source-code-bean-scroller/ Interesting cross reference can be found here: https://eab.abime.net/showthread.php?t=108550&page=2 |
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#78 |
Defendit numerus
Join Date: Mar 2017
Location: Crossing the Rubicon
Age: 54
Posts: 4,490
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Yeah, I remember when a few years ago I experimented with fast sinus scroll techniques and created this monster:
https://eab.abime.net/showpost.php?p...1&postcount=10 That test was brute force power and not very manageable (and bugged..), then over time I also created a small super-coloured intro where I manage large characters and many different layers with different speeds and at the same time also background scrollable bitmap and multiplexed sprite starfield. I have not checked other sources, but I think that the basic technique is the one I have explained in the past, for sure I didn't invent anything. I just applied some binary properties and established principles (and made the most of the blitter), others before me have already done similar stuff. The main question is how to exploit everything for something beautiful to look at ![]() Last edited by ross; 12 June 2024 at 14:15. Reason: spelling... |
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#79 | ||
Registered User
Join Date: Apr 2023
Location: "Hamcastle"
Posts: 23
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@ross
Quote:
Quote:
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#80 | |
Defendit numerus
Join Date: Mar 2017
Location: Crossing the Rubicon
Age: 54
Posts: 4,490
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Quote:
![]() It was inspired by and a tribute to an intro by Gaston, on steroids of course (overscan and many more effects). But sooner or later I'll finish it, it's been a long time since I touched the code, I hope I remember something... I'll ask a friend who has it to make a limited video version from a real machine and I put it into the Zone (or I use WinUAE to record it). |
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