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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 alogorithm starts ... , finally ending up at point x,y.
I've been ... provide an example of the DRAW command implemented in BASIC - but ... be clear, I can already draw bezier curves (and therefore, so ... -
X=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…
First public outing of X=Y=Z for the 48K Spectrum, a ... -
New Game : X=Y=ZFull version of X=Y=Z is now available from my site at: [URL="http://www.bobs-stuff.co.uk/extras/x=y=z.zip"]http://http://www.bobs-stuff.co.uk/extra…
Full version of X=Y=Z is now available from my ... /extras/x=y=z.zip"]http://http://www.bobs-stuff.co.uk/extras/x=y=z ... -
Why was/is the ZX Spectrum so popular?Why? How? Even after all this time you have a website like this etc.... It's just amazing!
... /> I welcome you in the DRAW X,Y,Z thread! -
Why was/is the ZX Spectrum so popular?Why? How? Even after all this time you have a website like this etc.... It's just amazing!
[QUOTE=Dr BEEP;472415]I welcome you in the DRAW X,Y,Z thread![/QUOTE]
You must reply to every 419 scam email you get ! ;) -
PAPER&INK: screen/character differenciation?So I was looking at a type-in listing earlier and I got to wondering how the Spectrum differenciates between knowing that the PAPER/INK commands need…
:)
[quote]DRAW x,y,z
Draws a line ... position moving [b]x[/b] horizontally and [b]y[/b] vertically relative ... />
[CODE]PLOT 64 , 128 : DRAW 7 , 10 , 1024 [/CODE]
DRAW repeated again from its finishing ... -
Sort 2 byte words (x, y) on ypos, also question about swap (DE), (HL)Well that was a lot of debugging ;) But if you want a routine which takes an array of 16 byte words x, y and then sort them on y (ignoring x), I'm…
... words x, y and then sort them on y (ignoring x), I ... x-coord, y-coord. It sorts on y-coord only and ignores the x ... (hl) ; A = data[right].y
or a ; CCF
cp c
ret z
; swap largest with ... /> dec a
ret z
srl b
... -
Convert x,y to Attribute Address in AssemblyWhat is the fastest way, given x,y (in hl) to return the attribute address?
What is the fastest way, given x,y (in hl) to return the attribute address? -
Getting attribute location from a screen coordinates (x,y)I am having trouble figuring out how to convert an x,y coordinate pair (pointing to a specific pixel) to the location of the attribute for the block …
... out how to convert an x,y coordinate pair (pointing to a ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... move database string" repeatedly setting 'z' to where the CPU/player ... counter for searching around position 'z'.
k
l ... flip player tokens.
x
y
z the position of the ... NEXT a:
[/code]
Draw the game board, including the ... -
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…
... (points) which are basically (x, y, z) triplets.
2) Have ... new coordinates using them and draw lines.
...
x' = x * cos(angle) + y * sin(angle)
y' = y * cos(angle) - x * sin( ... easy - just divide X and Y by Z. But be careful... ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... ROUTINE
org 0x2382
draw:
rst get_char ; get current ... ; x, y, (x' + y')/sin(g/2) = z'
fabs ; x, y, abs z' = z
fgt 0 ; x, y, z, sin ... ; exit calculator
call draw_line ; draw next arc
pop bc ... -
Vote the Best Game of 2014! [MULTIPLE CHOICE]You can read the title of the thread, can't you. Remember, it's a [B][COLOR="Red"][SIZE="6"]MULTIPLE CHOICE[/SIZE][/COLOR][/B] poll, vote how many g…
... Inventive but it didn't draw me in
Horace rescue ... 'd not seen before
X=Y=Z Great implementation of a great ... , I forgot to vote for X=Y=Z and Multidude, will see if ... -
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…
... $: IF A$="Z" THEN GO TO 380
170 READ X,Y
DRAW, X=+ve, Y=+ve
250 REM F=2 - DRAW, X=-ve, Y=+ve ...
260 REM F=3 - DRAW, X=+ve, Y=-ve ...
270 REM F=4 - DRAW, X=-ve, Y=-ve ... -
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…
... entry stack = X Y Z -> Draws circle at X,Y with radius Z
STACKA ... $5C7D ; Plot x,y values
;
DRAWBRESCIRCLE equ $
; Draw a Bresenham ...
SUB E ; x - y
SLA A ; 2 * (x - y)
LD E ... -
The state of things to come?Whilst I think it's great that our fave games are appearing on the iPad/iPhone/iToilet etc, I do think it is sad that games are now being taken from…
... because Elite have released pack x/y/z of games for their emulator ... -
X*Y*Z - A community project?Five years ago I wrote a game called [B]W*H*B[/B] ([URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0023478"]http://www.worldofspectrum.org/inf…
Five years ago I wrote a game called [B]W*H*B[/B] ([URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0023478"]http://www.worldofspectrum.org/infoseekid.cgi?id=0023478[/URL]) which was a little special because a number of people from here contributed ... -
Made In Creative UK - Loading screen.I'm a UK developer, and so support Made In Creative UK [URL="http://madeincreativeuk.com/"]http://madeincreativeuk.com/[/URL] My ZX81 games now incl…
... to do something similar for X=Y=Z, and since there are many ... -
Spectrum 4Ever : X=Y=ZIts Monday and its time for a new video. [youtube]U1iW5NhaLug[/youtube]
Its Monday and its time for a new video.
[youtube]U1iW5NhaLug[/youtube] -
ANN: Tipshop updated Thursday, 26 February 2015Thursday 26 February 2015 Happy New Year! Happy Valentines! Happy .. Oh, forget it (Yes, you're just a tad late. Ed) * Philip M. Anderson sent in P…
... and MattLamb provided tips for X=Y=Z.
* John Metcalf provided ... Xmas Remix, Dex, Ice Slider Z and Uroboros.
* GoodBoy ... 3000 , Gold Rush , Ice Slider Z , Impossible Mission II , Kidnap ,
Writing faster BASIC programsThere was an article in INPUT years ago, that I thought I'd share again some of the tips from it and link to the article, as it contains some good ad…
... loops like 100 LET X=X+1: IF X 360 THEN LET number ...Why so few open source Spectrum emulators?A couple of days ago I started to look into converting an existing Spectrum emulator to Pocket PC (mainly the iPaq) and ran into problems directly. T…
... access to
to system X-Y-Z that the user might have ...Anyone got a copy of 'Z80 for primates'?This Z80 lark isnt easy, in fact it makes me feel very much like Washoe the chimp trying to learn learn sign language, I just dont think I've got the…
... routine rather than simply do X,Y,Z to get a tone) and ...
