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<1234567…34>
  • i am currently listening to........as i couldnt seem to find the old one, i didnt look that hard :P ive started a new one right after somebody asked me for some slayer ive rediscovere…

    sonar circle - radius

    one of my fav jungle albums. moody and dark but not too full-on

    .http://www.youtube.com/watch?v=H9djSNhJ9vM
    def chris def chris September 2016 Chit chat
  • 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 8 octants of the circle.


    radius

    call circle

    ... =y0

    ;******Circle ******
    circle:

    ld ...
    rtunes rtunes September 2008 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…

    ... pseudocode for the Spectrum's CIRCLE algorithm? My machine code knowledge ... been using Bresenham's Midpoint Circle algorithm (copied from the web ... to use x, y and radius as inputs. Thanks!
    LevelUp LevelUp February 2020 BASIC
  • Zaf-forth to Z80 compiler Build 5This forth like complier is changing almost every day with new items been added. Here is a new Zaf-forth word add it the sptword.fth file - which is…

    ... />



    ;"Circle-Demo"
    ;"Draws 30 circles ... screen"

    ."Random Circle Demo"
    ;"print message"
    radius"


    ?rrandom ... , and r on stack call circle"

    next
    ...
    Steve(spt) Steve(spt) October 2004 Development
  • (Somewhat OT) Circular regression analysisI'd like to be able to regenerate the "Tunnel" image from [I]Jumbly[/I] (that's why this post is only "somewhat" off-topic), but to do so I need to b…

    ... .

    Picking out one circle (by recolouring it red) and ... centre (and from that the radius) using ONE set of three ...
    robert@fm robert@fm January 2006 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…

    ... 'd like to draw a circle x,y,r using the ... RET.
    I got a circle on the screen but after ...
    HZJ HZJ March 2014 Development
  • Z88DK NOOB cplot INK colorHi I am a complete NOOB with Z88DK, I am trying to draw colored circles. How does ink, paper and border work with Z88DK. I started trying to wo…

    ... />
    [code]
    /*
    * Hello CIRCLE
    */

    #include
    radius)
    {
    int x = radius;
    int y ...
    andydansby andydansby June 2016 Development
  • CIRCLE Help. Please.Hello. I have been reading the Spectrum Basic programming manual. Chapter 10 - Mathematical Functions - p52 - 53 i am trying to understand circles…

    ... round the circumference of the circle.
    So the manual starts ... /> so they walk round the circle in a right to left ... the 4 points on the circle at 0, pi/2, pi ...
    rholduser rholduser December 2020 Sinclair Basic
  • colouring inexample: 10 CIRCLE 45,30,15 wot do i type after it to colour it in red?

    ... try at a BASIC filled circle routine, probably slightly faster than ... the concentric circle approach, and probably better-looking ... center
    3 REM R=radius
    4 REM used vars ...
    GOC GOC February 2004 Development
  • Trig questionI'm trying to write a function that describes a 2D circle in 3D space - that's not important, just a bit of background! I've almost done it, but the…

    ... coordinates that will trace a circle (not sphere) in 3D space ... start point on circumference of circle you wish to trace

    vc - centre of the circle

    vp - a third ... of circle
    R = radius of circle
    A = angle in the circle
    NickH NickH June 2005 Sinclair Miscellaneous
  • Trig questionI'm trying to write a function that describes a 2D circle in 3D space - that's not important, just a bit of background! I've almost done it, but the…

    ... do this:

    Any circle can be described by
    radius of the circle. This circle is in the ...
    Philip Kendall Philip Kendall June 2005 Sinclair Miscellaneous
  • Trig questionI'm trying to write a function that describes a 2D circle in 3D space - that's not important, just a bit of background! I've almost done it, but the…

    ... do this:

    Any circle can be described by
    radius of the circle. This circle is in the ...
    Lee Fogarty Lee Fogarty June 2005 Sinclair Miscellaneous
  • (Somewhat OT) Circular regression analysisI'd like to be able to regenerate the "Tunnel" image from [I]Jumbly[/I] (that's why this post is only "somewhat" off-topic), but to do so I need to b…

    ... formula for a best fit circle in the least squares sense ... points.

    Formula for circle is:
    (x-a)^2 ... the centre and r the radius

    Fiddle with it ... want to fit to a circle, an overdetermined matrix equation can ... b^2) will be the radius.
    Alcoholics Anonymous Alcoholics Anonymous January 2006 Development
  • Problem with rotating procedureHi folks! I wrote a proc in z80 asm, based on: x' = x * cos (z) - y * sin (z) y' = x * sin (z) + y * cos (z) I used a precalculated table of sin a…

    The ultimate in efficient circle drawing routines is probably [url= ... lot of choice about the radius), but too good to go ...
    gasman gasman July 2006 Development
  • How can this work?You know how in realistic science-fiction (realistic as in obeying the accepted laws of physics), books and films such as 2001: A Space Odyssey, spac…

    ... particle is accelerating toward the circle's centre at any instant ... particle is accelerating along the circle's instantaneous path at any ... changing), mass and the radius of the circle's path. In a ... large the space station's radius is.

    Regarding ...
    Alcoholics Anonymous Alcoholics Anonymous October 2006 Chit chat
  • Some more off-topic questions...Just some more things I wonder about, especially when I can't sleep (I hate insomnia)... 1) Do jet packs actually exist? You never see them, even…

    ... are spinning around in a circle at 1667 km/h why ... the Earth's mass and radius. But if we (and the ...
    Alcoholics Anonymous Alcoholics Anonymous April 2007 Chit chat
  • 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 …

    ... is an implementation of Bresenhams circle algorithm


    ; ... real variable equation of a circle which is to be ... b,40 ;radius
    call circle
    ret

    circle: push bc ... to change this to sqrt radius
    push AF
    ...
    rtunes rtunes September 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…

    ... the parameter -2*radius when radius is bigger than ... radius

    ;D=x0
    ;E=y0
    circle: ... br />
    ;*************************************
    ;*******Main circle procedure*********
    ;*************************************

    ...
    rtunes rtunes September 2008 Development
  • Bouncing BallsPfrrt, I am back from lunch, playing the first raw version of BOUNCING BALLS It is very addictive! As stated here [URL]http://www.worldofspectru…

    ... ball lies inside the circle, or draw the circle in OVER 1 ... idea for it. Drawing the circle could be done by the ...
    Dr BEEP Dr BEEP September 2008 Games
  • Bouncing BallsPfrrt, I am back from lunch, playing the first raw version of BOUNCING BALLS It is very addictive! As stated here [URL]http://www.worldofspectru…

    ... a ball is inside a circle would be to use Pythagoras ... the square of the radius of the circle. If you keep the ... maximum circle size below 16 this can ...
    Matt_B Matt_B September 2008 Games
  • Bouncing BallsPfrrt, I am back from lunch, playing the first raw version of BOUNCING BALLS It is very addictive! As stated here [URL]http://www.worldofspectru…

    ... a ball is inside a circle would be to use Pythagoras ... the square of the radius of the circle. If you keep the ... maximum circle size below 16 this can ... />
    The square of the radius!
    You just made my ...
    Dr BEEP Dr BEEP September 2008 Games
  • Bouncing BallsPfrrt, I am back from lunch, playing the first raw version of BOUNCING BALLS It is very addictive! As stated here [URL]http://www.worldofspectru…

    ... the square of the radius of the circle. If you keep ... ]

    Largest circle is radius 87.
    So a table ...
    [code]
    a holds radius
    add a,a ; double ... ld l,a ; HL holds radius^2
    ret
    < ...
    Dr BEEP Dr BEEP September 2008 Games
  • Please help an absolute novice with some simple(ish) programming.I'm very, very rusty at BASIC. I'm using BASin, for my GCSE Astronomy coursework [quote] Use a spreadsheet and/or a graphing package, or write a com…

    ... it doesn't have a radius like circle. Instead it is described ... be using the center and radius (circle case) or two axis (ellipse ... case)

    CIRCLE:

    [code]
    10 ...
    Ralf Ralf December 2008 Sinclair Basic
  • Bit of geometry doing my head inI have a 2D rectangle of known dimensions, its sides are parallel to the X and Y axes. I'm trying to find an algorithm which will take the rectangle…

    ... algorithm which returns a perfect circle, and that isn't ... answer is obviously a circle with radius=sqrt((size*size)*2 ... ). Now calculate the radius of the circle (r=sqrt((w* ... rectangle, so the X radius of the ellipse is still ... r, and the Y radius is yr=r*h_scale.< ...
    pSXAuthor pSXAuthor July 2009 Chit chat
  • Bit of geometry doing my head inI have a 2D rectangle of known dimensions, its sides are parallel to the X and Y axes. I'm trying to find an algorithm which will take the rectangle…

    ... the answer is obviously a circle with radius=sqrt((size*size)*2 ... /w). Now calculate the radius of the circle (r=sqrt((w*w ... a rectangle, so the X radius of the ellipse is still ... xr=r, and the Y radius is yr=r*h_scale.
    murtceps murtceps July 2009 Chit chat
  • Bit of geometry doing my head inI have a 2D rectangle of known dimensions, its sides are parallel to the X and Y axes. I'm trying to find an algorithm which will take the rectangle…

    ... the answer is obviously a circle with radius=sqrt((size*size)*2 ... /w). Now calculate the radius of the circle (r=sqrt((w*w ... a rectangle, so the X radius of the ellipse is still ... xr=r, and the Y radius is yr=r*h_scale.
    andrew_rollings andrew_rollings July 2009 Chit chat
  • Bit of geometry doing my head inI have a 2D rectangle of known dimensions, its sides are parallel to the X and Y axes. I'm trying to find an algorithm which will take the rectangle…

    ... set of points against a circle, using Cartesian co-ordinates and ... with the square of the radius, rather than taking the square ...
    ajmoss ajmoss July 2009 Chit chat
  • 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…

    ... a radius coincident with the corner's angle bisector touches the circle ...
    JamesW JamesW October 2009 Chit chat
  • A couple of maths questions (theory, not application)1. Some bloke has worked out the value of PI to nearly 2.7 trillion digits, according to: [URL]http://news.bbc.co.uk/1/hi/technology/8442255.stm[/UR…

    The area of a circle is pi * r^2 (r=radius)

    circle boundary, it will still be ... "uncover" more detail of the circle.

    So by the ...
    Daren Daren January 2010 Chit chat
  • Graphics problemHi guys. Finally got a REAL zx spectrum, cost ?20 from a friend. When i draw plots and circles, it takes time to do it, but how do i do it instantly…

    ... rom is drawing a circle by connecting a bunch of ... by the radius in order to make the circle look smooth ... slow way to draw a circle but was done presumably ... way to draw a circle is to use a ... by taking advantage of a circle's geometric symmetry. Additonally ...
    Alcoholics Anonymous Alcoholics Anonymous February 2010 Sinclair Basic
<1234567…34>

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