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<1234567…34>
  • Bresenham's line algorithmHelp - I really am struggling to get my head around this algorithm. I don't know why, I coped with Cordic (SIN/COS) and integer divide routines (/10 …

    ... get my head around this algorithm. I don't know why ... am having problems coding this algorithm despite the existence of pseudo ... line
    ;Bresenham line drawing algorithm poorly implemented in the following ...
    Jimmy Jimmy August 2008 Development
  • Bresenhams circle algorithmI post here my final circle code to replace, if you want, the one in the ROM. It only uses integer math and runs very fast and is very compact. It is…

    ... />


    ;Bresenhams circle algorithm calculates the locations of the ...
    rtunes rtunes September 2008 Development
  • Any curve algorithm experts here?I'm wondering if any of you can help the helpless here. I'm just working on the Xmas Special intro animation, and I have a set of 3D points which des…

    ... anyone know of a good algorithm that produces a "nice-looking ...
    NickH NickH October 2009 Chit chat
  • Please test my Manic Miner remake!Thanks to everyone who downloaded my sneak preview of Manic Miner Turbo. Thanks especially to na_th_an who is the only person so far to give feedback…

    ... Miner Turbo. Thanks especially to na_th_an who is the only person ... you like to see corrupted attributes on the bottom of the ...
    Paradigm Shifter Paradigm Shifter February 2010 Games
  • DRAW x,y,a Algorithm - how does the ROM do it?Hi all, Getting on with SpecOS, and one of the things I would love to do is to preserve the original ROM's behaviour when drawing Arcs. This is don…

    ... of the explanation of the algorithm...

    So if anyone ... !) implementation of the Arc drawing algorithm implemented by the ROM. Just ...
    Dunny Dunny August 2010 Sinclair Basic
  • Route Diagram Search Algorithm?With regard to a diagram of the sort of which the picture below is a simple example. Given that routes are restricted to those going down the screen,…

    ... so on). Is there an algorithm whereby I can determine if ...
    Battle Bunny Battle Bunny October 2010 Development
  • Manipulating attributes...Hi Folks, I have written a routine that allows a blue bar to be scrolled up and down a list to select an item. Each item in the list occupies two l…

    ... />
    To allow the original attributes to be restored I take ...
    Paddy Coleman Paddy Coleman November 2010 Sinclair Basic
  • Chase HQ Pseudo 3d road algorithm ?Hello, I'm new to that forum and to the spectrum. I'm developping games for Colecovision (may be you hear about : Ghost'n Zombie and Smurf challe…

    ... to figure out the exact algorithm used in Chase HQ speccy ...
    youki youki February 2011 Development
  • Storing and displaying attributes...Hi Folks, I have a requirement to store and then redisplay a line of attributes from the screen. For example: 100 DIM a$(1,32) 110 LET line=10 120…

    ... then redisplay a line of attributes from the screen. For example ... the ability to restore the attributes in some way - another USR ...
    Paddy Coleman Paddy Coleman June 2011 Sinclair Basic
  • Mazes and Tremaux's AlgorithmI've done a version of Tremaux's maze solving algorithm which solves my current test maze with 400 junctions and 715 connections in a reasonably quic…

    ... of Tremaux's maze solving algorithm which solves my current test ... solutions, or suggestions for another algorithm which can do that.
    Battle Bunny Battle Bunny October 2011 Development
  • BIFROST* for graphic artists - part 2: static tilesThis tutorial provides some guidelines for designing multicolor tiles. Before reading this text, it's strongly recommended that you (re-)read [URL="h…

    ... if it used standard Spectrum attributes:

    [IMG ... be impossible using standard Spectrum attributes:

    [IMG] ... different using standard Spectrum attributes (except for the hero ... IMG] * [I]Multicolor tile by na_th_an[/I]

    Perhaps ...
    Einar Saukas Einar Saukas August 2013 Development
  • MOVE_M Object Movement Manager for BASICAs moving things around on the screen is usually the slowest part of a game written in BASIC, I've been pottering around with this routine to handle …

    ... ACTION defines, for each object, attributes which require special action
    attributes (ie. collision detection), ... a better random movement algorithm, and it needs to ... step
    ; ATTR = attributes for graphic
    ;ROW:COL ...
    Battle Bunny Battle Bunny September 2013 Sinclair Basic
  • Fast and easy read/write of attributes?What are the fastest or easiest ways to check the attributes of tiles on the screen, in BASIC? It seems to be a great way of storing object info. …

    ... easiest ways to check the attributes of tiles on the screen ... ATTR, allowing me to apply attributes to the screen?
    Is ...
    Dock Dock June 2014 Sinclair Basic
  • Brightness level of non-bright attributes on classic ZX 48Does anybody know what was a brightness level of non-bright attributes on classic ZX 48? Was it the same on 128, +2 and +3? I can see on wikipedia a…

    ... brightness level of non-bright attributes on classic ZX 48? Was ...
    moroz1999 moroz1999 September 2016 Hardware
  • Other than using attributes what other ways to detect collisions, when using char based movement?So I'm slowly working out the bits and pieces to write a game completely in assembly. I've been using attributes when writing in BASIC to detect whet…

    ... assembly. I've been using attributes when writing in BASIC to ...
    ivanb303 ivanb303 November 2017 Development
  • Chaos combat algorithm?I've searched, but nowhere can I find the algorithm that Chaos uses for combat, i.e. to determine whether a creature is killed. Does anyone know whe…

    ... nowhere can I find the algorithm that Chaos uses for combat ...
    SteveSmith SteveSmith January 2019 Games
  • 1982 Atari game, 'Entombed' - with uncrackable maze algorithmInteresting article: [url="http://www.bbc.com/future/story/20190919-the-maze-puzzle-hidden-within-an-early-video-game"]The mysterious origins of a…

    ... computer bits. The game’s algorithm decides this automatically by analysing ...
    Gwyn Gwyn September 2019 Chit chat
  • Pseudocode for CIRCLE algorithm?Can anyone provide me with the pseudocode for the Spectrum's CIRCLE algorithm? My machine code knowledge isn't up to reading the ROM routine. I'm try…

    ... for the Spectrum's CIRCLE algorithm? My machine code knowledge isn ... 'm trying to recreate the algorithm in another language and have ... using Bresenham's Midpoint Circle algorithm (copied from the web) which ...
    LevelUp LevelUp February 2020 BASIC
  • Matchpoint ball algorithmAnyone has any idea how Psions Matchpoint ball algorithm works? Are they calculating the balls' parabola (floating point for just the ball doesn't se…

    Anyone has any idea how Psions Matchpoint ball algorithm works? Are they calculating the balls' parabola (floating point for just the ball doesn't seem that calculation intensive) or do they use a known/common trick?
    tstih tstih July 2021 Development
  • Making a mapI should learn Z80 assembly, but I don't have the time (really busy) and I feel like making a game. I've tried with Colt which gives me enough speed…

    ... way to print a character+attributes on screen?

    (sry ... /> [ This Message was edited by: na_th_an on 2004-03-15 02 ... /> [ This Message was edited by: na_th_an on 2004-03-15 02 ...
    na_th_an na_th_an March 2004 Development
  • EmuZWin supports 256 color gamesI am sorry starting new topic, but you see this info is important a bit: new version 2.4 of the EmuZWin is available to download, and it supports 25…

    ... or another, but my paper attributes are always black. I'm ... /> [ This Message was edited by: na_th_an on 2004-04-10 14 ...
    na_th_an na_th_an April 2004 Emulators
  • EmuZWin supports 256 color gamesI am sorry starting new topic, but you see this info is important a bit: new version 2.4 of the EmuZWin is available to download, and it supports 25…

    ... and both of them use attributes to clean the sprites from ... ; those are previous cleared using attributes (poking 0s to video memory ... at the ingame screenshot: paper attributes are used to "delete" the ... /> [ This Message was edited by: na_th_an on 2004-04-11 13 ...
    na_th_an na_th_an April 2004 Emulators
  • EmuZWin supports 256 color gamesI am sorry starting new topic, but you see this info is important a bit: new version 2.4 of the EmuZWin is available to download, and it supports 25…

    ... with Internet.

    2 na_th_an:
    [quote]
    ... garbled screen ... , and both of them use attributes to clean the sprites from ... and ignore ink bits in attributes.
    [QUOTE]

    2 ...
    Vladimir Kladov Vladimir Kladov April 2004 Emulators
  • New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…

    This is what I've compiled so far:

    [quote]Resources
    =========

    * Make all caps
    ---------------

    You can turn CAPS LOCK on or off using a simple poke to 23658:

    POKE 23658,8: REM CAPS ON
    ...
    na_th_an na_th_an April 2005 Development
  • z88dk+splib2 sprites question.I'm creating a game and I have several "states" for my main sprite, such as jump, facing left, facing right, etcetera. All those states require a dif…

    ... 2005-09-30 08:49, na_th_an wrote:
    pucrunch compression alongside ... . Because of the underlying display algorithm used it may not be ...
    Alcoholics Anonymous Alcoholics Anonymous October 2005 Development
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    ... ' and 'b' when the FLASH attributes are printed, but I can ... in the above example, our algorithm will find this four in ...
    Digital Prawn Digital Prawn November 2007 Development
  • New oneliners for 2008[INDENT][INDENT][INDENT]Here's my attempt at a first-person-perspective 3d game in one line of BASIC. It's called 'wormhole', and you've got to get t…

    ... Einar Saukas;253761]Although this algorithm is very short, it may ... additional problem that this new algorithm is a lot slower than ... the fully random algorithm we originally used. Because of ... to do it with the attributes.
    Instead of showing the ...
    Dr BEEP Dr BEEP March 2008 Development
  • ELITE: 7.30pm tonight on FiveBoth Braben and Bell were interviewed, but not at the same time.

    ... code which uses the same algorithm) but as I understand it ... (fragments of planet descriptions, the attributes of planets etc) is required ... everything is generated by the algorithm - and hey presto, you have ...
    Winston Winston August 2008 Chit chat
  • Question about digitized sound and videoI searched the forums and couldn't find the answer, so here it goes. Regarding digitized sound: I remember reading an article long ago about a vid…

    ... glitches - with the basic delta algorithm, you can't use the ... is visibly loaded before the attributes. I started work on a ...
    gasman gasman November 2008 Development
  • Post your best SCRs - Image to ZX Spec 1.0.1 and beyondI've been playing around with Image to ZX Spec's encoding algorithms and I've achieved a "half colour" floyd steinberg mode, that it, the image is pa…

    ... it is for Timex 8x1 attributes; or the palette is restricted ... attributes, and tends to give pretty good results for a straightforward algorithm ...
    JamesW JamesW June 2009 Development
<1234567…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
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    John Elliott on April 21
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  • Screen AttributesNot sure if this is a devolopment question but here goes...<br /> <br /> In my limited understanding, the 'attribute file' of a speccy is 5800h to 5A…
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  • Bresenham's line algorithmHelp - I really am struggling to get my head around this algorithm. I don't know why, I coped with Cordic (SIN/COS) and integer divide routines (/10 …
  • Bresenhams circle algorithmI post here my final circle code to replace, if you want, the one in the ROM.<br /> It only uses integer math and runs very fast and is very compact.…
  • Any curve algorithm experts here?I'm wondering if any of you can help the helpless here. I'm just working on the Xmas Special intro animation, and I have a set of 3D points which des…
  • DRAW x,y,a Algorithm - how does the ROM do it?Hi all, <br /> <br /> Getting on with SpecOS, and one of the things I would love to do is to preserve the original ROM's behaviour when drawing Arcs.…
  • Route Diagram Search Algorithm?With regard to a diagram of the sort of which the picture below is a simple example. Given that routes are restricted to those going down the screen,…
  • Manipulating attributes...Hi Folks,<br /> <br /> I have written a routine that allows a blue bar to be scrolled up and down a list to select an item. Each item in the list oc…
  • Chase HQ Pseudo 3d road algorithm ?Hello,<br /> <br /> I'm new to that forum and to the spectrum.<br /> <br /> I'm developping games for Colecovision (may be you hear about : Ghost'n…
  • Storing and displaying attributes...Hi Folks,<br /> <br /> I have a requirement to store and then redisplay a line of attributes from the screen. For example:<br /> <br /> 100 DIM a$(1…

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