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Natur Pur   [2008]

Natur Pur Released by :
Exin, Girmann, LordNikon

Release Date :
23 March 2008

Type :
C64 One-File Demo

Released At :
Breakpoint 2008

Achievements :
C64 Demo Competition at Breakpoint 2008 :  #2

User rating:********__  7.5/10 (5 votes)   See votestatistics

Credits :
Code .... Girmann
Music .... LordNikon of Dekadence
Graphics .... Exin of Cosine

SIDs used in this release :
Hifi Bajs Kalsong Data(/MUSICIANS/L/LordNikon/Hifi_Bajs_Kalsong_Data.sid)

Download :
http://csdb.dk/getinternalfile.php/56292/exin_girmann_lordnikon__natur_pur.prg (downloads: 1450)
ftp://ftp.untergrund.net/breakpoint/2008/c64_demo/Videos/Exin_NaturPur.mp4 (downloads: 485)

Look for downloads on external sites:

Production Info
Submitted by Kabuto on 26 March 2008
A short description of how the zoom scroller works:
Basically it's a simple linecruncher with infinitely stretched sprites in borders, it's the kind of thing used in many demos for plasma effects, zoom scrollers etc.

What's different here is that in order to display a new text pixel row the line crunch & sprite zoom is suspended for one line so a bad line occurs, forcing the VIC to fetch new character data (which then include character info as well) and a new sprite row. The character data is stored in awkward locations (due to the line cruncher "eating" rows) so a precomputed table is used

The most complicated part was to compute all data required for a new frame. This includes lots of unrolled loops and even then there wasn't sufficient time. This is also why the scroller's height is less than the theoretically possible 200 rows.
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CSDb (Commodore 64 Scene Database) is a website which goal is to gather as much information and material about the scene around the commodore 64 computer - the worlds most popular home computer throughout time. Here you can find almost anything which was ever made for the commodore 64, and more is being added every day. As this website is scene related, you can mostly find demos, music and graphics made by the people who made the scene (the sceners), but you can also find a lot of the old classic games here. Try out the search box in the top right corner, or check out the CSDb main page for the latest additions.
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