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  • why does line length affect angle?I am using Plot Draw to make a V like drawing. It's part of an intersection on an isometric path. You would expect one half to be the inverse coordin…

    ... produce a given length of line although I could come pretty ... , you can simulate polar vector drawing using:
    [code]
    Angle ...
    GReW GReW November 2016 Sinclair Basic
  • why does line length affect angle?I am using Plot Draw to make a V like drawing. It's part of an intersection on an isometric path. You would expect one half to be the inverse coordin…

    ... produce a given length of line although I could come pretty ... figures that my graph paper drawing provided. After that I pressed ... mess. So I rechecked my drawing calculations and there were no ... solution was to enter a line and run it, adjust as ...
    mik3d3nch mik3d3nch November 2016 Sinclair Basic
  • Communal Project for ASM NewbiesHi Folks, I tend to learn best by trying stuff and then going through the pain of it not working so that I can research and fix mistakes. I suspec…

    ... - HL Points at line containing address for video Row ... line containing address for the video row we want to start drawing ... line containing address for the video row we want to start drawing ... ;2/7 - Pattern for drawing 8 consecutive pixels
    ...
    KrazyKattapilla KrazyKattapilla November 2016 Assembler
  • How would you approach parallax?So ... there is this trick by Joffa that we all know...of waiting for the ULA to reach certain pattern on the screen using the IN command. And then s…

    ... , and H selects the vertical line. It's fairly fast, allows ... LD based drawing (realtime-estimated for each scrolling step/line individually) + vertical ... 32 boundary. However, the 'ground line' uses a weird 4x2 format ...
    Hikaru Hikaru November 2016 Development
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    ... 8x8s are repeated elsewhere at line offset +4). I wasn't ... /> [quote="Einar Saukas;888096"]When drawing the scenery for a new ...
    colonel32 colonel32 November 2016 Development
  • How would you approach parallax?So ... there is this trick by Joffa that we all know...of waiting for the ULA to reach certain pattern on the screen using the IN command. And then s…

    ... I can scroll screen line for 1 pixel left ... stack to last byte in line and then repeating...
    ... carry flag for each scan line from tiles to "scroll ... . Or 736 per scan line. I am scrolling 5 ... states filling emptied column and drawing a sprite or two ...
    tstih tstih December 2016 Development
  • How would you approach parallax?So ... there is this trick by Joffa that we all know...of waiting for the ULA to reach certain pattern on the screen using the IN command. And then s…

    ... pixel scroll of one scan line, I guess. And I think ... when screen ray leaves the drawing area (guarded by an IN ... the end of first scan line
    .repeat 32 {
    xor ...
    tstih tstih December 2016 Development
  • Fast way to clear the screen ?So I was wondering fastest way to clear the screen. I've tried this and this works but is it better than CLS ? LD HL,16384 LD BC, 6144 Loop…

    ... following the raster that's drawing the screen, so you may ... of addresses that say which line of the screen to clear ...
    joefish joefish December 2016 Assembler
  • Fast way to clear the screen ?So I was wondering fastest way to clear the screen. I've tried this and this works but is it better than CLS ? LD HL,16384 LD BC, 6144 Loop…

    ... to get a smoothly rotating line hence we talking about the ... buffer screen in memory anyway. Drawing lines on Spectrum is quite ... make your buffer linear, then drawing lines in it may be ...
    Ralf Ralf December 2016 Assembler
  • Akalabeth gamei found now that someone ported an ansi-basic game (coded in 1979?) to msx-basic - what about a zx-spectrum basic version of it? ;) https://plus.goo…

    ... normal colour, as any overlapping line graphics look better if they ... tables & code relating to drawing the graphics, just doing direct ...
    Battle Bunny Battle Bunny December 2016 Sinclair Basic
  • Akalabeth gamei found now that someone ported an ansi-basic game (coded in 1979?) to msx-basic - what about a zx-spectrum basic version of it? ;) https://plus.goo…

    ... timed drawing the Balrog, initially just replacing the DRAW statement in line ... DEF FN was put at line 2:
    [code]DEF FN ... BASIC display loop uses DATA line 791 in this instance.
    Battle Bunny Battle Bunny January 2017 Sinclair Basic
  • Calling all Career Programmers.I currently work in academia and am getting fed up with the long days and never feeling done. It seems like academics have long summers and good vaca…

    ... of setting a time and drawing a line under it. No work ...
    Scottie_uk Scottie_uk January 2017 Chit chat
  • Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …

    ... 496 bytes. Drawing the two counters one pixel line at a time ...
    FrankT FrankT February 2017 Assembler
  • Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …

    ... high characters is slower than drawing two standard size characters. So ... code for printing one pixel line of the two numbers.
    FrankT FrankT February 2017 Assembler
  • A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…

    ... whether the moved sprite when drawing each line of the sprite - unnecessarily
    Jerri Jerri March 2017 Development
  • Look whats possible in 924 bytesSo, finally after over a year of development and nearly 25 years since I first designed the graphics, I've actually made it to the point where this i…

    ... %01000011;line 0F ;line 0D (43) ;0f
    db %00110011;line 10 ;line 0E ... , so skip drawing
    ld b,a ;B=line length
    add_line_in ...
    Arkannoyed Arkannoyed March 2017 Development
  • Look whats possible in 924 bytesSo, finally after over a year of development and nearly 25 years since I first designed the graphics, I've actually made it to the point where this i…

    ... %01000011;line 0F ;line 0D (43) ;0f
    db %00110011;line 10 ;line 0E ... , so skip drawing
    ld b,a ;B=line length
    add_line_in ...
    Arkannoyed Arkannoyed March 2017 Development
  • 2 scrolling linesHow would you draw, delete and scroll a 2 line landscape? [img]http://i1142.photobucket.com/albums/n608/daveyboyhughes/scramblines_zpsw0r2joew.png…

    ... wanted to scroll a 2 line background by 1 pixel each ... screen using rotate instructions. Perhaps drawing/deleting the 2 lines based ...
    R-Tape R-Tape April 2017 Development
  • 2 scrolling linesHow would you draw, delete and scroll a 2 line landscape? [img]http://i1142.photobucket.com/albums/n608/daveyboyhughes/scramblines_zpsw0r2joew.png…

    ... HL as part of the drawing code that gets executed. With ... step up/down a character line etc, so you don't ...
    Hikaru Hikaru April 2017 Development
  • 2 scrolling linesHow would you draw, delete and scroll a 2 line landscape? [img]http://i1142.photobucket.com/albums/n608/daveyboyhughes/scramblines_zpsw0r2joew.png…

    ... , but tweaked to work line-by line and synched with the raster ... have moved over, such that drawing sprites with transparent PAPER makes ...
    joefish joefish May 2017 Development
  • I am currently watching.....This stems from a rant Mel did months ago on the currently listening to thread, and he suggested starting a thread like this to somebody (sorry can't…

    ... when he stepped out of line, that they would bust him ... such a good job at drawing as many people as possible ...
    grey key grey key May 2017 Chit chat
  • ALIEN (Mindgames) Bugfix and Improvement.[code]ALIEN (Mindgames) [ZX SPECTRUM] BUGFIX & IMPROVEMENT by Ersh 2016-10-29 The following bugs are fixed: [BUG] INVENTORY BUG WHEN SWITCHING …

    ... if the Alien AI keeps drawing a random number of 0 ... that aren't explicitly in line with the author's vision ...
    Ersh Ersh May 2017 Announcements
  • ZX-Paintbrush and global palette and ula+ supportHello, I think I need some help for the palette issue of ZX-Paintbrush. I want to check whether the way I'm about to clear the palette handling i…

    ... not longer show a pixel line while drawing.

    [3] [b ... directly under the "free attributes drawing tool"[/u]
    [5] colonel32 ...
    clausjahn clausjahn May 2017 Software
  • Flicker free animation in BASIC, is it possible ?With all my various noodlings in BASIC and indeed with my so far limited assembly​ I keep coming up with the same issue. How do you do animations wit…

    ... of the program for faster line number lookups etc all will ... more time to get your drawing done...
    Dunny Dunny May 2017 BASIC
  • im looking for a horizontal scroll routinehi, im looking for a horizontal scroll routine. i read somewhere that you can do it with at 'to' statement, somewhere in a print routine. althoug…

    ... "]sorry, i dont see wireframe line drawings anywhere in that program ... -Notes.TXT .

    The line drawings are constructed via lines ... to give a very slow drawing routine.

    Can you ...
    Battle Bunny Battle Bunny June 2017 Sinclair Basic
  • z88dk sp1lib with fzxThe numbers dont seem to display properly? fzx by itself works [quote] // for targets supporting fzx // zcc +zx -vn -startup=31 -O3 -clib…

    ... often drawn. Of course not drawing a sprite is faster than ... drawing one.

    [quote]
    even if I insert this line ...
    Alcoholics Anonymous Alcoholics Anonymous June 2017 Development
  • off screen bufferwhen using an offscreen buffer is the memory copied to the screen in a way that makes it easier to draw sprites to the buffer? E.g. Lets say you…

    ... br /> - linear (next horizontal line data is always after previous ... line data)
    - just the ... notice that when you are drawing sprites during point b) ... backgrounds and capture background when drawing the sprites
    - redraw ...
    Ralf Ralf June 2017 Development
  • off screen bufferwhen using an offscreen buffer is the memory copied to the screen in a way that makes it easier to draw sprites to the buffer? E.g. Lets say you…

    ... /> Rather than doing all the drawing in the buffer, another way ... nextlinedown ;DE down one screen line
    pop bc
    djnz ... : ;move DE down one screen line
    inc d
    ld ...
    R-Tape R-Tape June 2017 Development
  • off screen bufferwhen using an offscreen buffer is the memory copied to the screen in a way that makes it easier to draw sprites to the buffer? E.g. Lets say you…

    ... line of the sprite. You won’t benefit from LDI when drawing ...
    Ast_A_Moore Ast_A_Moore June 2017 Development
  • z88dk terminalsto set up a terminal a bunch of numbers are needed: m4_zx_01_output_fzx(_window_1, 0x2330, 0, 0, 1, 14, 1, 19, 0, _ff_ao_Prefect, 14, 0, 14, 8, 1…

    ... while the raster is not drawing to the screen. Following a ... cycles to the top pixel line, then 224*192 cycles to ...
    Alcoholics Anonymous Alcoholics Anonymous July 2017 Development
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