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FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... /> * font names I will add pixel height only
* colouring ... you get the fastest possible pixel-only printing.
* ... a font. Ie - you can plot the horizontal pixels twice. Andrew ... that will fit a given pixel width. This will slice words ... -
Random object placementI'm looking for some advice on placing objects randomly in a game. I have a routine that reads a table and prints the corresponding object: 0 prints…
[QUOTE=Jerri;817782][QUOTE=Einar Saukas;817774]I just run a simple empirical test (plotting randomly on screen) to compare the random generator algorithms mentioned here:
[CODE]10 FOR f=0 TO 20000
20 LET y=USR 32768: IF y -
Vertical XOR filler.. anyone?Hi, I was just wondering whether a vertical filler using XOR has ever been used on Speccy demos/games and if yes when for the first time? Just tryin…
... each edge only contributes one pixel in each column. For example ... columns. You'd have to plot it like this instead:
Vertical XOR filler.. anyone?Hi, I was just wondering whether a vertical filler using XOR has ever been used on Speccy demos/games and if yes when for the first time? Just tryin…
The trick is to plot the start and end pixels ... each edge only contributes one pixel in each column. For example ... columns. You'd have to plot it like this instead:
Raycasting (3D Games!) with SpecBAS<div><font face="Arial, Verdana"><span style="font-size: 13.3333330154419px; line-height: normal;">Here's one I wrote just recently. I wanted to see …
... , the texture slopes. So each pixel of floor and ceiling has ...Raycasting (3D Games!) with SpecBAS<div><font face="Arial, Verdana"><span style="font-size: 13.3333330154419px; line-height: normal;">Here's one I wrote just recently. I wanted to see …
... find it quicker to just plot out the nearby facing surfaces ... closest vertical slice for each pixel column of the screen. Subsequent ...A few hardware questions regarding Z80 and eZ80Hi Guys, Maybe some of you could help me with these questions: I would like to know what is the actual file size limit that can be used by z80 …
... have a fixed size plot of land. But can ... terms of colours and pixel resolution. But the more ...
Analogue colour TV pixel size is limited. Colour CRT ... called a shadowmask. Each colour pixel (a red, green or ... of to each TV pixel, reg, green and blue ...ZX81 Character SetHello, hope I don't offend anyone with my request. I've put together a program on my Amstrad that redefines a condensed text and displays it appropri…
... functions to affect line spacing, pixel placement, printing to windows, scrolling ... , line editing, pixel width measurement and text justification ... on Graphics which is using PLOT & UNPLOT.
I wasn ...ZX81 Character SetHello, hope I don't offend anyone with my request. I've put together a program on my Amstrad that redefines a condensed text and displays it appropri…
The ZX81 PLOT & UNPLOT commands just select ... the correct location. The resulting "pixel" is actually a 4 x ... 4 pixel block. This in the standard ... possible to display images with pixel resolutions up to 256x192 (or ...ZX81 Character SetHello, hope I don't offend anyone with my request. I've put together a program on my Amstrad that redefines a condensed text and displays it appropri…
... working on a ZX81 using PLOT I guess it would just ... if it equaled 1 to PLOT a point, otherwise move to ... are no pixel addressable graphics available from BASIC, PLOT and UNPLOT just ... bytes if you stored each pixel as a number, for even ...Flood FillHi Folks, Can anyone point me to a flood fill that I can call from ZX BASIC? I have looked through the archive and although there are posts about…
... they plot entire screen bytes at a time rather than one pixel ...I don't think I'm getting the $22AA Pixel-Add rom routineDear all, I'm misunderstanding how the PIXEL-ADD rom routine works. My code... [code]ld b,175 ld c,1 call $22AA ld (hl),a ret[/code] So…
... /> The Accumulator holds the x pixel position within the character square ... 'd need to shift your pixel-pattern right by A places ... to get the correct pixel.
One way:
For a more useful plot routine, you'd combine your ...I don't think I'm getting the $22AA Pixel-Add rom routineDear all, I'm misunderstanding how the PIXEL-ADD rom routine works. My code... [code]ld b,175 ld c,1 call $22AA ld (hl),a ret[/code] So…
... very similar to the ROM Plot routine) is that you can ... if you wanted to un-plot a pixel, you can start with ...Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
... a graphic's pixel coordinates in c(). (The PLOT in line 40 ... the graphic in a random pixel sequence. I'll do it ... c(pc,2)=y:
PLOT x,y
50 NEXT ... ): LET y=c(i,2): PLOT x,y
90 LET ...Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
... position the pixel coords table gets rearranged in reverse PLOT sequence each ... /> ld b,(hl) ;BC=yx=pixel coords
ld de,(P2C ... ),de
call $22e5 ;PLOT_SUB PLOT B,C=y,x
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…
... /> Convert HPLOT absolute X pixel coordinate to DRAW relative X ... -> PLOT
Convert a 280-col X pixel coordinate to ... pixel coordinate
DEF FN y(y)=175-y: HPLOT -> PLOT ...
Convert a 160-row Y pixel coordinate to ...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…
... plot and draw would have to be remapped to the pixel grid ...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…
... assumption that the first pixel is a plot and the remaining are ... .g. 254 for next pixel pair is another Plot, 255 is end ...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…
... , and fractions on a pixel screen will always result in ... d-x*d
70 PLOT x2,y2
80 ... 90 IF y=0 THEN PLOT x2,y2: DRAW d2,-d ... 100 IF x=5 THEN PLOT x2+d2,y2-d: DRAW ... 120 NEXT x
130 PLOT 8,64: DRAW 0,50 ... DRAW 0,-50
140 PLOT 128,124: DRAW 0,50 ...2 scrolling linesHow would you draw, delete and scroll a 2 line landscape? [img]http://i1142.photobucket.com/albums/n608/daveyboyhughes/scramblines_zpsw0r2joew.png…
... is still based around 8-pixel groups, so the most efficient ... pixel in each column. Even then clearing the screen to re-plot ... . By starting them shifted one pixel over then the last thing ...Can I name a subroutine and then call it by name?No thats not really exactly the problem. I wrote 4 lines of Basic that draws an 8x8 square and then told it to check x,y and subtract 4 from x or y t…
... : OVER 0
...
1234 PLOT ...
...
RETURN
[/code ... of movement (rather than using PLOT/DRAW).
Coincidentally I ... I can get a horizontal pixel scroll in BASIC with a ...Calculating coordinates for a curveI need to write some code that will calculate the arc of a curve so that I can draw a sprite at each location to simulate a ball being thrown. The an…
... you ignore air resistance. Now plot your steadily increasing horizontal position ... want to jump in big pixel steps, you can divide the ...How to stop a flickering character erasure?I'm trying to figure out how to build a moving sprite. Eventually it will be made up of several UDG's. However its early days yet so I'm experimentin…
... get more subtlety by moving pixel by pixel. Thats going to take ... /> I did think of using plot/draw to make an outlined ...im looking for a fill routine written in basici know this would be slow but i want to tinker with it to produce something else.
... ]
Lines 100-120 plot some random stars in colours ... to-left, leaving one pixel to the right.
... increasing random amount then plot a point. Because it ... left at least one pixel. But the sum in ... each pixel individually and decide whether to plot it ...Printing text, part MMXIIXI'm pretty sure there's been a zillion threads about this already, and I don't think it's the first one by myself either, but here goes. Proportiona…
... br />
; increment pixel offset
ld a, ... pixel offset
; if pixel offset goes over byte boundary, plot the second pixel ... ; plot
exx
; keep pixel offset ... ld c,b ; new pixel offset
bit ...Random GRASSHello guys, Many yrs ago I used predefined UDG as grass to fill some area, adding to it via PLOT or POKE. It seems that PRINTing a string$ combin…
... x and y
Plot the pixel
Recalculate but check the ... result (so theres a one pixel space seperating plots)
Random GRASSHello guys, Many yrs ago I used predefined UDG as grass to fill some area, adding to it via PLOT or POKE. It seems that PRINTing a string$ combin…
... another call it Y, plot a pixel at those co-ordinates. Generate ... to 255 limits, if so plot. Do this...no, wait, this ...Artillery - projectile motion gameI started writing this around 25 years ago and abandoned it due to performance issues, and a lack of physics knowledge. Bandersnatch on Netflix fille…
... always see a single magenta pixel plot where the shot re-enters ...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…
... , takes around 3 scanlines to plot each pixel. Mine is doing 3 ... the screen once for every pixel.
And second, as ... be willing to sacrifice +-1 pixel endpoint accuracy for speed (e ... , shallow slopes, work in 2-pixel steps). I can afford to ...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…
... then you can no longer plot your way inward from both ... ; RLC D to set a pixel.
Though you could ... have one pixel unrolled using SET n and ... the other pixel (the other end of the ...
