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<1…15161718192021…34>
  • 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…

    ... =0: LET x=100: LET y=125
    10 PLOT x,y
    20 PLOT a,b
    21 ... IF x>=a THEN ...
    Arda Arda September 2008 Sinclair Basic
  • Bring Back ? Star Wars (CH4 @9pm)Just a heads up If you saw the documentary about Justin Lee Collins reuniting the A-team ? Well he is doing another one, this time on Star Wars. …

    ... which it's usually referred, plot-wise it has nothing to ... (and extremely cliched) space opera plot that uses the SW footage ...
    Zagreb Zagreb September 2008 Chit chat
  • Print ATHello, Can someone please tell me how to do a Print AT command? Thanks,

    ... you need and compile these assembly instructions.

    Here we ... 16
    LD a,10 (x-coord)
    RST 16
    Rickard Rickard September 2008 Sinclair Basic
  • Design Design / Crystal ComputingNice post on [URL="http://groups.google.com/group/comp.sys.sinclair/browse_thread/thread/56e6ebdedc6930ac#"]comp.sys.sinclair[/URL] about [URL="http:…

    ... .
    inc hl ; point to x coord.
    ld d,(hl ... wish I had known some assembly back then *for real* - would ...
    Arjun Arjun October 2008 Sinclair Miscellaneous
  • Print ATHello, Can someone please tell me how to do a Print AT command? Thanks,

    BetaBASIC lets you PLOT x,y;a$
    Bethan Bethan October 2008 Sinclair Basic
  • Screen access in assemblerI am again troubled by the unusal screen design of the Spectrum. :) If I want to do something with, say, a 16x16 bit block of the screen (in the sam…

    ...

    B= Y, C= X

    [code]
    ld ... corner, not left down like PLOT does)
    [/code]

    Dr BEEP Dr BEEP November 2008 Development
  • Small BasicFor all those people who ask "where's the equivalent of Sinclair BASIC for today's generation", I give you (a link to) [url=http://msdn.microsoft.com…

    ... had that with a 256 x 192 graphics window and colors ... .SetPixel(x,y,color) equates to PLOT and
    GraphicsWindow.GetPixel(x,y ... special case of GraphicsWindow.Ellipse(x,y,width,height) or something ...
    Geoff Geoff November 2008 Sinclair Basic
  • Spectrum Review Book is all systems go ![url]http://www.spectrumgamesbible.co.uk/[/url] We've created a small website for the series of books we are looking to create for the Speccy featur…

    ... some idea of what the plot is and also to get ... joypad. (would rather use my X-Box controller though).

    zeropolis79 zeropolis79 December 2008 Sinclair Miscellaneous
  • A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…

    ... scrolling starfield with parallax. Uses plot/erase star method (not ...
    LD HL,STARPOS_X ; store X position of star
    ADD ... ; y co-ordinate in d, x co-ordinate in e
    LD A,E ; get the x-coordinate

    SRL ...
    Digital Prawn Digital Prawn December 2008 Development
  • A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…

    ... />
    LD HL,STARPOS_X ; store X position of star
    ADD ... again

    CALL PLOTSTAR ; plot the stars initially
    POP ... ; y co-ordinate in d, x co-ordinate in e
    LD A,E ; get the x-coordinate

    SRL A ...
    Digital Prawn Digital Prawn December 2008 Development
  • A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…

    ... case

    CP 'x' ; x=quit
    JR NZ,KEYTEST1 ...
    LD HL,STARPOS_X ; store X position of star
    ADD ...

    CALL PLOTSTAR ; plot the stars initially
    POP ... LD A,E ; get the x-coordinate

    SRL ...
    Digital Prawn Digital Prawn December 2008 Development
  • Please help me complete this lil'programI'm editing Basic programs that were saved in Timex TOS discs, and every load command starts with LOAD *"filename". If I want to go through these pr…

    ... /> PRINT AT 0,0;"Working...": PLOT 0,166: DRAW 255,0 ... l=250/(e-s): LET x=2
    9998 LET e ... TO e: PLOT x,164:
    DRAW 0,-2: LET x=x+l:
    zxbruno zxbruno December 2008 Sinclair Basic
  • 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…

    ... /> An elipse has a center (x,y) just like a circle ... />
    [code]
    10 LET X=128:LETY=87:LET R ... TO 6.28
    30 PLOT X+ R*SIN I,Y+R ... />
    [code]
    10 LET X=128:LETY=87
    15 ... TO 6.28
    30 PLOT X+ Haxis*SIN I,Y+Vaxis ...
    Ralf Ralf December 2008 Sinclair Basic
  • 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…

    ... />
    [code]
    10 LET X=128:LETY=87
    15 ... TO 6.28
    30 PLOT X+ Haxis*SIN I,Y+Vaxis ...
    Rockford Rockford December 2008 Sinclair Basic
  • Using INPUT without clearing last two lines of screen?I'm trying to print to the 22nd row of the screen using the ol' print #0 trick. Unfortunately, I require user INPUT which seems to wipe out the botto…

    ... ]I'm no expert in assembly but would it be possible ... INK are only there to mask the printed return value from ...
    Bob Stains Bob Stains January 2009 Sinclair Basic
  • Defender of the crownI have checked recently the Spectrum version of this well known, great game and the Spectrum version is strange. [url]http://www.worldofspectrum.org…

    ... some famous game (eg. Agent-X), and put them together with ... in fact ripped from Agent-X (as far as I remember ... Studio, we coded in Oxford Assembly (I'm not sure about ...
    G.o.D. G.o.D. January 2009 Games
  • Wireframe GraphicsI'm trying to get my head round 3d / wireframe graphics and not really having much luck. I've had a good look on google, but mostly come up with wir…

    ... vertices (points) which are basically (x, y, z) triplets.
    ... axis origin is:

    x' = x * cos(angle) + y * sin( ... /> y' = y * cos(angle) - x * sin(angle)

    Please ... br />
    Doing this in assembly requires fast line drawing routine ...
    baze baze January 2009 Development
  • Wireframe GraphicsI'm trying to get my head round 3d / wireframe graphics and not really having much luck. I've had a good look on google, but mostly come up with wir…

    ... axis origin is:

    x' = x * cos(angle) + y * sin( ... br /> y' = y * cos(angle) - x * sin(angle)

    [/QUOTE ... READ t(x,1),t(x,2),t(x,3),t(x,4)
    80 NEXT X
    x,2)*COS (angle)
    180 PLOT x1,y1
    190 NEXT x ...
    Arda Arda January 2009 Development
  • Wireframe GraphicsI'm trying to get my head round 3d / wireframe graphics and not really having much luck. I've had a good look on google, but mostly come up with wir…

    ... the lines of 4xy = (x + y)^2 - (x - y)^2. Again, I ... examples of 3D Wirteframes in Assembly Language?[/QUOTE]

    I ...
    baze baze January 2009 Development
  • User reviewsAs often requested (e.g. [URL="http://www.worldofspectrum.org/forums/showthread.php?t=18135"]here[/URL]), user reviews are now possible through the s…

    ... that's one for the x-files then till someone comes ... like that'll require some assembly language knowledge to get it ...
    Arjun Arjun February 2009 Games
  • Simple text compressionI just checked one idea about text compression. Do not take it as recomendation but rather as info which can you save some time when you are solving …

    ... source (e.g. if no 'x' appears, it won't take ... /> This might be an interesting assembly code for the "one m ...
    BloodBaz BloodBaz May 2009 Development
  • Simple text compressionI just checked one idea about text compression. Do not take it as recomendation but rather as info which can you save some time when you are solving …

    ... source (e.g. if no 'x' appears, it won't take ... /> This might be an interesting assembly code for the "one m ...
    Fikee Fikee May 2009 Development
  • 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…

    Draws parameters are "X displacement, Y displacement":

    ... Sinclair BASIC:

    [code]PLOT x1, y1
    DRAW x2 ... does the magic:
    30 PLOT x1, y1: DRAW OVER 1 ...
    na_th_an na_th_an May 2009 Sinclair Basic
  • SCREEN$ 1.9e Released!And here's another update! [url]http://paul.dunn.googlepages.com/SCREEN_1.9e.rar[/url] There's a few new things in this release, but it's mostly bu…

    ... 32
    Red Mask is 00FF0000
    Green Mask is 0000FF00
    Blue Mask is 000000FF
    Current Mode: 1024 x 768 (32 bit) (75Hz)
    zxbruno zxbruno May 2009 Sinclair Miscellaneous
  • Sinclair BASIC compiler for PC?Boriel's compiler is very powerful but it isn't meant for Sinclair BASIC, and the old compilers in the archive have their limitations: BASIC listing …

    ... /> 20 FOR x = 0 TO 255: PLOT x, VAL a$: NEXT x[/CODE]
    boriel boriel May 2009 Development
  • SCREEN$ 1.9e Released!And here's another update! [url]http://paul.dunn.googlepages.com/SCREEN_1.9e.rar[/url] There's a few new things in this release, but it's mostly bu…

    ... .

    Even though Direct-X is working and dxdiag reports ... 16
    Red Mask is 0000F800
    Green Mask is 000007E0
    Blue Mask is 0000001F
    zxbruno zxbruno May 2009 Sinclair Miscellaneous
  • 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…

    ... internally. Byte 1 = Command (PLOT, DRAW) etc and extra DRAW ... + parameters} where each COMMAND (PLOT, DRAW, STOP) takes a known ...
    1=[B]PLOT [/B](two parameters: X, Y follow)
    2 ... requirements.

    Relative Plot and Absolute Draw: [B]PLOTR ...
    BloodBaz BloodBaz May 2009 Sinclair Basic
  • Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …

    ... use
    ; PRINT AT y,x; #4; "some text";. All 256 ... new data area).
    ; PRINT, PLOT, CIRCLE and DRAW now function ...
    chev chev May 2009 Development
  • can someone help with a rom routinei have been trying to draw a simple line with a the rom routine , but i just cant get it to work , so if anyone can give me an example in z80 that wo…

    ... holds 'y' relative, C holds 'x' relative. D holds the sign ... E holds the sign for x. The line is drawn from ... 'last' position, so do a PLOT 100,100 or similar before ... LD C, 50 ;C holds x-relative
    LD D, 1 ... E, 255 ;it's a -x movement
    CALL 024BAH ; ...
    RST#08 RST#08 August 2009 Development
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