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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 …

    ... of the Spectrum ROM for DRAW-LINE at $24B7 is ... detail given for CIRCLE and DRAW ARC).

    The Z88 ... />
    [CODE];now draw the line
    ;Bresenham line drawing algorithm poorly ... ,writefinish ;finished if trying to draw 0,0!

    ...
    Jimmy Jimmy August 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]…

    ... up with an asm Bresenham's drawing routine. The ... in memory with a Bresenham's algorithm. This ASM ...
    [CODE]
    ; ---------------------------------------------------------------------
    ; DRAW using Bresenham's algorithm and screen positioning ...
    boriel boriel December 2010 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
  • CIRCLEHi, I'd like to draw a circle x,y,r using the BASIC-ROM subroutines. I've put x, y and r onto the calculator stack and used CALL #232D and RET. I g…

    ... ]

    I wrote a Bresenham circle routine once which was ... ]
    DRAWBRESCIRCLE equ $
    ; Draw a Bresenham circle at oX,oY radius ...
    dbolli dbolli April 2014 Development
  • Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…

    ... here's one for a Bresenham circle as well

    DRAWBRESCIRCLE equ $
    ; Draw a Bresenham circle at oX,oY radius ...
    dbolli dbolli March 2019 Development
  • 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…

    Bresenham circle is the way to ... /> ;
    DRAWBRESCIRCLE equ $
    ; Draw a Bresenham circle at oX,oY radius ...
    dbolli dbolli August 2020 BASIC
  • 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 ... , or Pascal!) implementation of the Arc drawing algorithm implemented by the ... be clear, I can already draw bezier curves (and therefore, so ...
    Dunny Dunny August 2010 Sinclair Basic
  • 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 …

    ... and Z80 assembler.
    bresenham is, in general view ... not bresenham. BASICs CIRCLE is just DRAW x, y, arc command ... with specific parameters (i think). it is terribly slow, bresenham ... implemented in basic will draw circle a ...
    Fikee Fikee September 2008 Development
  • 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…

    ... an arc, calculating offsets etc.

    it looks like "bresenham's ... Basic has an implementation of Bresenham's algorithm, but as I ... source code for plot and draw implementations there, as I know ...
    Arda Arda January 2012 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
  • 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
  • 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
  • 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
  • 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…

    ... should be called Refex Arc and not Reflex Arc, as stated on ...
    Ivanzx Ivanzx March 2012 Infoseek database
  • Not MIA but DD: Arc of YesodArc of Yesod on eBay, no bids yet, 55mins remaining. Blatant ad by me. It's not missing in action, but it is Distribution Denied for anyone interest…

    Arc of Yesod on eBay, no bids yet, 55mins remaining. Blatant ad by me.

    It's not missing in action, but it is Distribution Denied for anyone interested.
    steveinuk steveinuk April 2012 Sales
  • ZX-Paintbrush 2.2.9.5Dear ZX-Paintbrush friends, I want to present you some preview pictures of my latest progresses. Well, there are some bug-fixes to do, but it's work…

    ... . There are some new figures - arc tool:
    [IMG]http://www ... [/IMG]

    Orthogonal line - draw one line and one point ... [/IMG]

    Parallel lines - draw one line and one point ... (with 4 points - as the arc tool):
    [IMG]http://www ...
    clausjahn clausjahn November 2012 Emulators
  • Can anyone draw pixels?I'm not sure where is best to post this request, but I would like to know if anyone out there would like to draw some Speccy graphics for me. It's no…

    ... out there would like to draw some Speccy graphics for me ...
    Shaun.Bebbington Shaun.Bebbington January 2013 Sinclair Miscellaneous
  • melbourne drawIt could be said I am easly pleased,:grin: Very nice peice of software. I was realy impressed by its ease of use. I think a lot of time and effort w…

    ... if i realy want to draw fancy shapes I can just ... the hobbit graphics to melborne draw. any ideas?

    Side ...
    wibble wibble August 2013 Development
  • draw single pixel in the borderI have problems with drawing in the border. I can get it to draw a line ,but it always becomes a line and not a single pixel. <br><br>rept 3580 <br…

    ... . I can get it to draw a line ,but it always ...
    micken micken May 2015 Development
  • Euro 2016 Draw AKA The 'England Are Gonna Win' ThreadNow I know it's currently the 'in thing' to think the England footie team are overrated, overpaid, uninterested twonks, but thought I'd start a threa…

    ... start a thread as the draw is at 5.30pm (GMT ...
    Maroc's Other Projection Maroc's Other Projection December 2015 Chit chat
  • How to draw a picture on ZX Spectrum Basic?How can i draw a picture on ZX Spectrum like this?? http://www.worldofspectrum.org/infoseekid.cgi?id=0026662

    How can i draw a picture on ZX Spectrum like this?? http://www.worldofspectrum.org/infoseekid.cgi?id=0026662
    DerekAutista DerekAutista December 2016 Games
<1234567…34>

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Related Threads

  • 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 …
  • 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…
  • 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 …

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