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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 ... am having problems coding this algorithm despite the existence of ... detail given for CIRCLE and DRAW ARC).

    The Z88 ... [CODE];now draw the line
    ;Bresenham line drawing algorithm poorly implemented ...
    Jimmy Jimmy August 2008 Development
  • Graphical Amusementsstefano (another z88dk bod) has been working on something interesting: run them with the usual LOAD "" [url]http://stefanob.webs.com/rabbit.tap[/ur…

    ... the converter, not by the draw routines though I suppose this ... ). svg has things like draw bezier and draw arc but the converter substitutes ...
    Alcoholics Anonymous Alcoholics Anonymous November 2009 Development
  • 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…

    ... This is done by using DRAW x,y,a where the ... of the DRAW command implemented in BASIC - but not the arc drawing ... Pascal!) implementation of the Arc drawing algorithm implemented by the ROM. ... Just be clear, I can already draw ...
    Dunny Dunny August 2010 Sinclair Basic
  • 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 ... ) it calculates

    ;we draw a pixel in each of ...
    rtunes rtunes September 2008 Development
  • A fast DRAW routineI was investigating how to speed up the line drawing for the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=20225"]BASIC compiler[/URL]…

    ... Bresenham's algorithm. This ASM ... br /> ; DRAW using Bresenham's algorithm and screen positioning ... ---------------------------------------------------------------------

    ;; DRAW PROCEDURE
    PROC
    ...
    boriel boriel December 2010 Development
  • 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…

    ... the maze, whether it should draw a wall or a space ... computer bits. The game’s algorithm decides this automatically by analysing ...
    Gwyn Gwyn September 2019 Chit chat
  • Complex DRAW command?After looking at some Speccy code I noticed that the DRAW statement is used to draw lines (or it looked that way). On the Coco, the LINE command was…

    ... ;171327]How does Geoff's DRAW program work? The three argument ... DRAW command is meant to draw arcs, not regular ... />
    No rounding involved, the algorithm is completely integer based, and ... not very close to an arc with higher values.
    NotFound NotFound February 2007 Development
  • 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 …

    ... general view, faster than dda algorithm but works much better on ... . BASICs CIRCLE is just DRAW x, y, arc command with specific parameters ... , bresenham implemented in basic will draw circle a bit faster than ...
    Fikee Fikee September 2008 Development
  • Best way to store vector images in Sinclair BASIC?Let's forget for a moment that Sinclair BASIC is slow. If I have a picture made entirely of vector images, what would be the best way to store that d…

    ... guess it's better to draw shapes as polygons (or ... continious lines) and draw them in one go. So ... to implement a new drawing algorithm. You can poke a ... two by two and draw until you stumble upon ... change drawing mode to an arc, a circle etc.
    ...
    Arda Arda May 2009 Sinclair Basic
  • PLOT and DRAW in machine codeHow do you go about it? If I posted a really simple BASIC instruction could someone do a machine code routine so I could learn from it? I wouldnt k…

    ... many functions like drawing an arc, calculating offsets etc.
    < ... looks like "bresenham's line algorithm" is the fastest one and ... an implementation of Bresenham's algorithm, but as I tested it ... source code for plot and draw implementations there, as I know ...
    Arda Arda January 2012 Development
  • MazeBot: new BASIC game!Unlike Dash-it though, this is not a proper game. It's actually a you-draw-computer-solves maze program with a maze editor that allows you to save an…

    ... . It's actually a you-draw-computer-solves maze program with ... computer uses a fairly simple algorithm to solve the maze, and ...
    Arjun Arjun May 2004 Games
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... based on a differential update algorithm. It achieves flicker-free status ... that makes it easy to draw and animate sprites and ... />
    2. The display draw order has changed. In splib2 ... this reason your program should draw sprites first before doing ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Development
  • Complex DRAW command?After looking at some Speccy code I noticed that the DRAW statement is used to draw lines (or it looked that way). On the Coco, the LINE command was…

    ... noticed that the DRAW statement is used to draw lines (or it ... command was used to draw lines and the DRAW statement was completely ... position isn't updated after draw)
    B = blank (move but ... don't draw)

    "U8R8D8L8" would draw a square 8 ...
    JamesD JamesD February 2007 Development
  • Your views on...The Arc of Yesod[url=http://www.worldofspectrum.org/infoseek.cgi?regexp=^Arc+of+Yesod%2c+The$&pub=^Thor+Computer+Software$&loadpics=on]The Arc of Yesod[/url] OK! Th…

    ... .worldofspectrum.org/infoseek.cgi?regexp=^Arc+of+Yesod%2c+The$& ... +Software$&loadpics=on]The Arc of Yesod[/url]

    CUCHULAINN CUCHULAINN April 2007 Games
  • Fastest way to decide which pixel to paint in order to draw a straight line(after I saw "Bresenhams circle algorithm" in development forum, I decided to ask this in here) in fact, I want to accelerate a car towards a direct…

    (after I saw "Bresenhams circle algorithm" in development forum, I decided ...
    Arda Arda September 2008 Sinclair Basic
  • Cobra's ArcMartijn, the game Cobra's Arc by Dinamic is also called Cobras Arc (without the '), If you take a look at the front and back cover. cheers! ;)

    Martijn, the game Cobra's Arc by Dinamic is also called Cobras Arc (without the '), If you take a look at the front and back cover.

    cheers! ;)
    Ivanzx Ivanzx February 2009 Infoseek database
  • Draw (x1,y1) to (x2, y2)?I was never very good at math. :( Given the above variables, what should I do to draw a line between the two pixels? How do I calculate the values fo…

    ... , what should I do to draw a line between the two ... I calculate the values for DRAW?

    I thought it ... />
    PLOT x1,y1
    DRAW ????.????

    I've seen ...
    zxbruno zxbruno May 2009 Sinclair Basic
  • wanna draw zx graphics :)Is anybody looking for a zx graphics ? I would like to help with graphics if there are projects that need it. Here is an example of a sprite (may be …

    ... big for a sprite) i draw today just for test :)))
    beZz beZz August 2009 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
  • Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…

    ... this chapter we will
    - draw our 'car' by changing the ... character square to blue.
    - draw our 'road' by using a ... line we use the following algorithm -
    Choose a location in ...
    bigjon bigjon November 2009 Development
  • Oooh! Good draw!England has come up trumps with the World Cup 2010 draw. We're in group C, playing against USA, Slovenia and Algeria. I think it's pretty safe to say…

    England has come up trumps with the World Cup 2010 draw. We're in group C, playing against USA, Slovenia and Algeria. I think it's pretty safe to say that we won't be knocked out of the 1st round :D
    The Starglider The Starglider December 2009 Chit chat
  • How works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…

    ... related to the draw rom subroutine. The Line-Draw require two sets ... show a working example to draw a line in asm ? because ...
    arfgh arfgh June 2010 Sinclair Basic
  • [SpecOS] Question about OVEROk folks, this one has me (and a few friends) stumped. How would you implement OVER in SpecOS? Bear in mind that I'm after an algorithm which I appl…

    ... that I'm after an algorithm which I apply to each ... graphics commands like CIRCLE, ELLIPSE, DRAW, PLOT etc), and information available ...
    Dunny Dunny September 2010 Sinclair Miscellaneous
  • 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
  • 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
  • Oceans 'Melbourne Draw+' utility and MOREWas this preserved? I thought I had all my microdrives from Ocean salvaged but I don't seem to remember this being put on WOS? It's Melbourne Draw bu…

    ... on WOS? It's Melbourne Draw but with stuff bolted on ...
    Mark R. Jones Mark R. Jones October 2011 Sinclair Miscellaneous
<1234567…34>

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Related Threads

  • 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.…
  • Reflex Arc or Refex Arc?According to the cassette inlay from "That?s the Spirit", the development group should be called Refex Arc and not Reflex Arc, as stated on the entry…
  • No speech in Cobra's Arc? A mystery tale from Spain...I once downloaded CsA - probably from some Spanish retrogaming website - in TAP format. While I usually discard TAP files in favor of TZX ones as soo…
  • Complex DRAW command?After looking at some Speccy code I noticed that the DRAW statement is used to draw lines (or it looked that way).<br /> <br /> On the Coco, the LINE…
  • Your views on...The Arc of Yesod[url=http://www.worldofspectrum.org/infoseek.cgi?regexp=^Arc+of+Yesod%2c+The$&amp;pub=^Thor+Computer+Software$&amp;loadpics=on]The Arc of Yesod[/url]…
  • 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.…
  • Fastest way to decide which pixel to paint in order to draw a straight line(after I saw "Bresenhams circle algorithm" in development forum, I decided to ask this in here)<br /> <br /> in fact, I want to accelerate a car towa…
  • Cobra's ArcMartijn, the game Cobra's Arc by Dinamic is also called Cobras Arc (without the '), If you take a look at the front and back cover.<br /> <br /> chee…
  • Draw (x1,y1) to (x2, y2)?I was never very good at math. :( Given the above variables, what should I do to draw a line between the two pixels? How do I calculate the values fo…

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