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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? -
Flood Fill ConundrumI have written a flood fill alogirithm. It uses the stack, but only with the y axis. It works quite well, but on large polygons it does take a while …
... 2 registers set with the x, y. They all use the stack ... the source (minus the initial x,y to screen address calculation).
... breadth-first filler as opposed to a depth-first recursive ... 900 bytes to fill an arbitrary region on screen. The black ... -
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…
...
; de = screen address
; l = x coord
; h = y coord
x y to screen address" the first param will be x, the second y. In ... "screen address to attribute address".
zx_px2bitmask() stands for "pixel x to ... -
Beginner's z88dk help rqdI'm struggling to get my first z88dk C program to compile. My program is this: #include <spectrum.h> int main() { zx_border(INK_BLACK); } …
... /> for (y=0; y!=24; ++y)
for (x=0; x!=32; ++x)
*zx_cxy2saddr(x,y)=255 ... ;
}
[/code]
cxy2saddr = "character x,y to screen ... -
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 …
... how to convert an x,y coordinate pair (pointing to a specific pixel) to the ... the screen.
Does anyone know of a way to do ... this? I imagine that once I understand the screen ... layout better then I will find it easier to do ... -
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…
... byte words x, y and then sort them on y (ignoring x), I' ... to an array of 16 byte values and those are x-coord, y ... that is in the wrong position relative to the others.
< ... br />
// Move current root to end
swap(arr[0 ... -
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…
... things I would love to do is to preserve the original ROM ... is done by using DRAW x,y,a where the alogorithm starts ... , finally ending up at point x,y.
I've ... can help, I'd love to see a BASIC (or ... ) but I want to be able to reproduce the odd shapes ... -
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, ... ]
Many thanks already to Chris, Matt, and Einar for ... help in bringing the game to life. -
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 ... .bobs-stuff.co.uk/extras/x=y=z.zip"]http://http://www ... .uk/extras/x=y=z.zip[/URL]
Many thanks to Einar ... -
Print (to screen) avalue held in a register pairHi guys, looking for a routine that will print any value from 0 to 65535 to the current position on the screen. I once heard that there was a PRIN…
... value from 0 to 65535 to the current position on the screen.
to the current screen position.
Cheers :D -
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…
... loop counter for searching around position 'z'.
k
position 'w' is used later for 'backtracking' to flip player tokens.
x ...
y
z the position of ... to a dummy failed move in the centre of the screen ... -
New member here. And a spider! :)Hello everyone. My name is Sekrets. I'm quite a lonely individual, searching for a digital home where I might find fellow speccy enthusiasts to adopt…
... So for example, zx_pxy2aaddr (pixel x,y to attribute address) takes a pixel ... done with adding one to the screen address (eg INC ... vertical pixel position, not just those aligned to character squares ... graphic right before drawing to screen. This is a more ... -
Simple SpriteHow do you draw a sprite on the screen? For example i want to draw a smiley face sprite and would like either a link to a tutorial or a very well com…
... a newbie who's started to learn asm recently I found ... the book itself (someone seems to have scrawled over the scans ... can calculate a screen display position from the x y ('PRINT AT') position.
to write a simple maze game ... -
Editorless AGD Now for Spectrum as well as Next/TimexI've updated the editorless version of AGD to 0.3, fixing the Next/Timex CLS routine and adding a Spectrum engine and compiler. For those not alread…
... There's a PRINTMODE command to toggle between double height or ... There's AT X Y to change the cursor position and a new PRINT ... flipped X and Y around. Putting an object on the screen also ... requires coordinates.now and JUMP.requires an argument to ... -
Matchpoint ball algorithmAnyone has any idea how Psions Matchpoint ball algorithm works? Are they calculating the balls' parabola (floating point for just the ball doesn't se…
... the ball position with the y position set to the same ... proper 3D working out screen coordinates involves a division ... you can do 2 things to avoid that:
x, y on screen is just (ax, ... be 1 as well to make maths more efficient), ... -
Matchpoint ball algorithmAnyone has any idea how Psions Matchpoint ball algorithm works? Are they calculating the balls' parabola (floating point for just the ball doesn't se…
... bottom left in screen space
p=(x,y,z) // initial position
v ... they are on screen
// can scale p.x, p.y and p ... reflect x & z if you want when they hit screen boundaries ... bit trickier if you want to take into account the time ... -
Dizzy X-Journey To Russia - English translation in 48/128 version & FIX of Abe's Mission-MissionHello there! Last week, there was discovered English translation of Russian game Dizzy X-Journey To Russia on the Internet. But it was available onl…
... translation of Russian game Dizzy X-Journey To Russia on the Internet ... Speccy 48k! So I decided to combine it with original Russian ... Russian version and added them to translated
version... Here is ... -
Dizzy X-Journey To Russia - English translation in 48/128 version & FIX of Abe's Mission-MissionHello there! Last week, there was discovered English translation of Russian game Dizzy X-Journey To Russia on the Internet. But it was available onl…
... translation of Russian game Dizzy X-Journey To Russia on the Internet ... Speccy 48k! So I decided to combine it with original Russian ... Russian version and added them to translated
version... Here is ... -
Converting jpeg/bmp/gif to SCREEN$ fileMight be a bit of a long shot, but is there any way of converting an image file with the correct dimensions/colours to SCREEN$ file that can be loade…
... with the correct dimensions/colours to SCREEN$ file that can be loaded ... up with a converter program to do this.
Failing ... -
BBC to screen live game tournamenthttp://www.bbc.co.uk/news/technology-34475037 interesting, could be the start of something? [quote]The BBC is to stream live coverage of a majo…
... />
[quote]The BBC is to stream live coverage of a ... /> maybe we can get them to screen a knockout manic miner tourny ... -
I feel like such a moron having to post this but stillI started out to write a simple cursor move program to demonstrate how easy it is to program in Basic! Hah, serves me right. I started by setting…
... variables x and y at 10.15 followed by print * at x,y ... and ran it to check it worked. ... IF INKEY$=u THEN LET X=X-1. Followed by three ... to look for was changed as was the values of x and y ... added a line to print the values of X,Y to see what ... -
"La Abad?a del Crimen" - English versionOK, I've started a new thread for this, as the discussion about "La Abad?a" in the [url="http://www.worldofspectrum.org/forums/viewtopic.php?mode=vie…
... loader, make the dedication screen appear for X amount of seconds, ... 1 in a FOR x=y TO z ... NEXT x loop, rather than just ... during the dedication screen and skip to the loading screen. you could ... on time after the loading screen appears.
"Some" ... -
Getting scr addresses from x and yCould someone please tell me how to calculate the 8 screen addresses corresponding to a character printed in basic at coordinates x and y? For examp…
... can
a) handle your (y,x) to screen address and
b) write ... x&y to a defined address. Is it too complicated to adapt it to ... transfer a window defined by x,y, width ... -
Getting scr addresses from x and yCould someone please tell me how to calculate the 8 screen addresses corresponding to a character printed in basic at coordinates x and y? For examp…
... x&y to a defined address. Is it too complicated to adapt it to ... restores the whole screen (excluding attributes if you wish) to a buffer ... good if you need to keep the rest of the screen unaffected) -
SpecBAS: Request for comment - SpritesHi all - Having been slaving away at the new SpecBAS release, I've decided to finally bite the bullet and implement a sprite engine. I've got a nice…
... display is composited. The main screen (window 0) is rendered, and ... n PATH x,y TO x1,y1 TO x2,y2 ... TO xn,yn to define a ... is a single colour. The screen is 8bpp, so changing colours ... you can sub-divide the screen, or are you talking about ... -
next pixelI searched the "Discussions" groups for the phrase "next pixel" and got no matches - and removing the quotes it discards the "next" and just searches…
... /> zx_cyx2saddr = character y,x coord to screen address
zx_saddr2py = screen address to pixel y coord
zx_saddrpup = screen address pixel ... -
smooth movement in basicWas trying to figure this out myself but i would like to be pointed in right direction now :-). How do I make something move in Basic without gettin…
... x=horizontal and y=vertical, so if using x & y in PRINT position ... variable names it's generally better to use x ... in 'column' names and y in ... all x/y names to use x=horizontal/column and y=vertical/ ... -
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…
... are the distance to move in the x and y axes, or< ... br />
SPRITE MOVE mysprite TO x,y
To ... move it to a particular place on the screen ... ,x,y
And it will be pasted onto the screen ... -
Some issues with my UDG programFor the sake of remembering how to do some things in Basic, I started coding a small program that could be used to create UDGs: [url]http://db.tt/tt…
... program that could be used to create UDGs:
x and y are initially set, x1 is equal to x and y1 to y ...
-If x ... or y change ... was expected (set c(x,y) to 1 if 0 and ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... take a couple hundred cycles to update your sprites with ... there is no technical advantage to having the sprite hardware ... takes a couple hundred cycles to update sprites in dedicated ... also don't have to convert from x,y to screenbuffer offset, no copying ...
