Log inRegister an accountBrowse CSDbHelp & documentationFacts & StatisticsThe forumsAvailable RSS-feeds on CSDbSupport CSDb Commodore 64 Scene Database
You are not logged in 
CSDb User Forums


Forums > CSDb Entries > Release id #152153 : Tis the Season
2016-12-14 07:39
Digger

Registered: Mar 2005
Posts: 249
Release id #152153 : Tis the Season

Great little intro Cruzer, can you reveal the technique you are using for multiplexing? Would it be possible to arbitrarily change X positions? Or is there some tight coupling with $d010. Thanks!
2016-12-14 08:41
Cruzer

Registered: Dec 2001
Posts: 920
The technique is that there's an NMI every 8th line. Then for each sprite I allocate an NMI to set the x/y pos. D010 is handled in an eor table, so for each sprite where x > $ff I set its bit at the sprite's top and bottom in that table. Then each NMI eors the current d010 value with the table like an eor filler.

So yes, the x-position can be arbitrarily changed. I was experimenting with independent sines for each flake, but it took too much memory and rastertime.

Btw, it's an improved version of the snowplexer in Snolder & Garn from last year. Hope it's improved enough that it counts as "exclusive code" in the ICC rules. :)
RefreshSubscribe to this thread:

You need to be logged in to post in the forum.

Search the forum:
Search   for   in  
All times are CET.
Search CSDb
Advanced
Users Online
algorithm
Titus/Rabenauge
sailor/Triad
Krill/Plush
Guests online: 41
Top Demos
1 Uncensored  (9.7)
2 Edge of Disgrace  (9.7)
3 Coma Light 13  (9.6)
4 The Shores of Reflec..  (9.6)
5 Lunatico  (9.6)
6 Comaland 100%  (9.5)
7 Incoherent Nightmare  (9.5)
8 Wonderland XII  (9.5)
9 Comaland  (9.5)
10 Wonderland XIII  (9.5)
Top onefile Demos
1 Pandemoniac Part 2 o..  (9.6)
2 FMX Music Demo  (9.6)
3 Daah, Those Acid Pil..  (9.5)
4 Synthesis  (9.5)
5 Dawnfall V1.1  (9.5)
6 Dawnfall  (9.4)
7 Treu Love [reu]  (9.4)
8 Field Sort  (9.4)
9 KAOS 64  (9.3)
10 One-Der  (9.2)
Top Groups
1 Oxyron  (9.4)
2 Booze Design  (9.4)
3 Censor Design  (9.3)
4 Crest  (9.3)
5 The Judges  (9.3)
Top Coders
1 Axis  (9.8)
2 Crossbow  (9.8)
3 Graham  (9.8)
4 HCL  (9.8)
5 Lft  (9.7)

Home - Disclaimer
Copyright © No Name 2001-2017
Page generated in: 0.153 sec.