StarInfo/Nonsense/Text/StarInfo

Home » Archimedes archive » Acorn User » AU 1998-06 A.adf » Regulars » StarInfo/Nonsense/Text/StarInfo

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

Tape/disk:	Home » Archimedes archive » Acorn User » AU 1998-06 A.adf » Regulars
Filename:	StarInfo/Nonsense/Text/StarInfo
Read OK:	✔
File size:	4AB7 bytes
Load address:	0000
Exec address:	0000

Well Connected
We�ve had quite a collection of things from Dennis Ranke in the last few months, his most recent donation to these pages is a version of the classic game Connect4. The cunning part is that it is entirely hand coded in ARM and fits in 512 bytes. If you can�t understand "ܠ�100, then Dennis has conveniently supplied commented source code for you to peruse.
When started, you are are prompted to enter a level number between 1 and 9. Level 1 is search depth 4, player begins, level 2 the computer begins. Level 5 is search depth 5, player begins and so on up to 9 which is search depth 8. The higher the level, the longer it takes for the computer to play, on a Strong ARM, it took 10s to play the first move on level 9.
During play, select your column by pressing a number between 1 and 7. Press ESCAPE to exit the game. Winning or loosing is indicated with a �smiley�, if the computer wins it will be happy :�), if you win, it's sad :�(.
Cloud-hailer
The late arrivals for the Cloud challenge continue... Nigel Stoner has supplied two more entries into our indefinitely extended competition.
Clouds is almost a one-liner and all Nigel uses is a handful of SINs, COSs, circles and rectangle copies to produce an incredibly convincing vista of clouds racing across the sky. Sitting here, writing this in early April, I only have to look out of my window to see exactly this sort of scene. Apart from the horizontally striped land that is.
VClouds2 is harder to describe, but try to imagine Teletubby land with no Po and no Noo-Noo and after some hideous Alien Transmutating gamma ray has gene spliced the bunnies into Eastern European monolithic tower blocks. (Crikey! that strange chinese man who sold me those spotty �shrooms wasn�t wrong . . .)
Nigel says �There�s something about drawing clouds on a comp that is hard. An artist told me all clouds are on a canvas is a box? Cound it be that simple?� (sic) I think Mr. Choi-Tan may have paid Nigel a visit too...
Nigel has also sent in Twister, which is simulation of a hurricane as seen from directly below (or above).
Reactivation
The game Reaction seems to become the *info equivalent of Sugar Puffs - just when you think you�ve forgotten about it, it comes back on you. We published the original, 8-bit(!) version of Atoms way back in September 1991 and since then we�ve seen 32-bit, hi-res, desktop, non-desktop, automatic, computer players, 256-colour, and goodness knows how many other versions. To top these off, we now had Robert Hampton�s network version.
NetReact makes use of Justin Fletcher�s NetGame library (originally in the January 1998 issue). If you do not have a copy to hand, then it is also available from his web site: http://gerph.home.ml.org/
To play, connect to the Internet and run the game. Clicking on the NetReact icon bar icon will open a connect window. Enter the name and port for a machine to connect to, or select one from the pop-up menu. If connection is successful, then the board will be displayed on screen.
You can send messages using the �Message� button on the main window. All of the other buttons should be reasonably self explanatory, but if not, Acorn�s !Help application is fully supported.
Players take turns to place counters on the board. You cannot place a counter on a square occupied by a counter of a different colour. If a square gets too many counters on it, it will become unstable and explode, sending its counters onto neighbouring squares, turning any counters on those squares to the exploded square�s colour. To win, you must turn all counters to your colour.
French Curves
Gary Larson once said he could have got away with calling it The Cow Side and he would have easily had enough material for life. I�m sure we could have called this *Fractal and retired quite happy. Follow us, then, for another excursion into that chaotic world . . . All four of these programs have been written by Alain Brobecker of Challex in France (Hence the title of this piece).
First, DevilCurve. The Devil�s curve function is based on Cantor�s set. It is a continuous line and according to Alain "is nowhere differenciable." We�re not quite sure what Alain means by this, but he does apologize for his English writing. It is generated recursively for any two given points. Instead of just joining the two points together with a straight line from x1,y1 to x2,y2 . Three line segments are drawn:
from x1, y1 to ( 2 x1 + x2) / 3, (y1 + 2 y2 ) / 3
to ( x1 + 2 x2 ) / 3, (2 y1 + y2 ) / 3
to x2, y2
The three sub-lines are, of course, actually drawn via a recursive call. As always, after a certain depth, the recursion is �nipped off� and only a single line is drawn.
DevilCurve draws a diagonal line across the screen at various �depths� each coloured differently (from red to white), pressing SPACE after each will draw the next.
Julia_iim
This uses an inverse iteration method (hence the iim) to draw the classical Julia set. Instead of computing z(n+1) in the expression z(n+1) = z(n)� + c, the opposite calculation is performed, i.e. assuming z(n+1) is known, the two roots z(n) are computed
PainEpice
This fractal is known as The Gingerbread Man (The program name is taken from the french equivalent). Thought the equations used are very simple, the result is chaotic and the looks strangely like a gingerbread man.
VonKoch
We�ve seen the good old VonKoch snowflake many times in *info, This particular version is plotted using a grammar system - The simplest snowflake is drawn using the rule:
- r r - l - r r - l - r r - l - r r - l - r r - l - r r
where - moves forward, drawing a line,
r turns right PI/3 and l turns left PI/3 (radians),
When following this set of rules, any "-" can be replaced by "l - r r - l -" obviously scaling the line segments as necessary. Alain�s program draws five (nested) iterations of the snowflake starting with the simple set of rules above. The second flake has each "-" replaced. As Alain says, the trickiest bit was calculating the start position of each iteration!

Point-to-point
Scott Boham has souped-up a past submission - Points is one of those �loads of dots sort of following each other� type demos, and works very well.
By default, you have mouse control - the pattern is randomised to start off with (hence the fractal-like squiggle in the centre of the screen) but thereafter new points are taken from the mouse position. There are five variables that can be changed and the values of each are conveniently set at the start:
m% the mode number, by default 31 but any sixteen-colour mode will do. The program is intelligent insofar that it works out how many pixels there are across and down the screen.
mouse% by default TRUE, but you can disable the mouse by changing to FALSE.
p% the number of points - 200 by default, but Risc PCs and StrongArms will be able to cope with many thousands.
spd% the speed - 6 by default. Each point move dist/(2^spd%) closer each frame
frames% the number of frames that are drawn before the screen is cleared and a fresh pattern begun. On faster machines you will want to increase the value from the default of 10000 (or increase the number of points). On my RiscPC (without StrongArm) it seems to be able to plot about 20 000 points per second. You can use the middle mouse button to clear and restart manually.
The program works in a very simple way. Each point is stored in a table as an X and Y co-ordinate (shifted up) and just follows the next point. However, since the next point is itself following the one after, the �spirograph�-like pattern emerges. The pleasant charcoal effect is achieved by used a sixteen-shade grey scale and plotting each point so that it increments the darkness of the pixel (up to 15, which is black).
Pee-poo-pee-pee-pah-pah-pee
I'm not sure which bright spark came up with the idea of tone-dial phones, but no doubt when the archaeologists of the future reflect on our extinct civilisation they may conclude that the pee-pah-poos we all know and love formed the basis of a simple ten-tone music system. But I digress. Whether you wish to dial your favourite number from the comfort of your computer, or whether you wish to compose some minimalist masterpiece (a la Philip Glass), this utility from Justin Fletcher will suit you down to the ground.
ToneDial is a utility which simply takes a phone number as parameter and dials it. For example:
*ToneDial 0800 123 456
It's Gamma Time
If, like Justin Fletcher you grow weary of Risc PC users showing off about all the things they can do, you may enjoy his latest utility. It allows gamma correction on pre-Risc PC machines.
If you don�t know what gamma correction is, or haven�t missed the ability to do it thus far, you haven�t really been missing much quite frankly. All that it involves is a lookup table that allows all colours displayed to be adjusted by user-defined values. So, in practice, this means you can brighten (or dim) the whole display, or make subtle adjustments to the R, G and B if you are desperate to get your on-screen colours spot on. This is important for a few users (those involved with artwork or printing - where what you see on screen has to match what you see on paper) but isn�t too vital when you�re playing Lemmings.
On a Risc PC this is all done in hardware. On other machines, the work involved is �dead easy� says Justin. (Well, it might be for a seasoned ARM code programmer like him.)
�Trap the Palette Vector to ensure we know about those fun gamma correction table setting requests (number 9), then on to all the funny old ColourTrans routines which require �palette entries� (RGB values to you and me) we stick a simple lookup in it�s place. Fun eh?
�Actually, two bits of the code aren�t that easy - Select/GenerateTable and SelectGCOLTable - here you have to find out the number of colours actually in the mode or sprite in question; this is made more fun by 256 being used to mean that r0 is not a sprite pointer, but that r1 is a pointer to a sprite.
�Other than that it�s all dead simple. I wrote a �reverse conversion� routine to do the opposite of the colour lookups. Unfortunately, it�s not used. Nor tested. It�s there though.�
Justin has included a short little program (QikGamma) to set your gamma values - remember to install the Gamma310 module first (if you haven�t got a Risc PC!) Enter the corrections for R, G and B. A value of 1 means normal; <1 means darker and >1 lighter - change with care!
The smog on the screen's all mine all mine
...and indeed, can be yours too, courtesy of Ryan Li. He admits to being a little jealous of Windoze users� ability to choose desktop colour schemes at the click of a mouse button. In retaliation, Ryan has developed an array of six subtly different desktop looks - Blue, Deep Sea, Desert, Ocean, Smog and Violet.
Each scheme features its own palette and window background tile. They work on all Risc OS machines, although you will obviously need 3.5 or more for the window backgrounds to be displayed.
Just double-click on the scheme of your choice. Or copy the appropriate directory into !Boot.Choices.Boot.Tasks to install on boot-up. Ryan has only included 256 colour mode background tiles (for space) so if you normally use a 32 000 (or more) colour mode you will need to load the WindowTile sprite file and copy tile_1-8 as tile_1-16, resaving afterwards.
Syrup and listen
...or rather watch this pleasingly plasmic demo from Philip Mellor. Now, you may say, what is so special about a plasma demo? We've all seen then come and go over the years. Well, the big difference with Syrup is that it�s written in C. This proves that speedy graphic ditties no longer have to be written in ARM code. And it also means that more readers will be able to look at the source code and work out what on earth is going on! (Well, a few more anyway.)
Philip completed the program (and it�s baby brother SyrupSmall - with a smaller plasma area for a faster frame rate) in just 24 hours after acquiring Easy C++. So we wait with bated breath to see what he can do given a month or two.
The plasma effect is producted in the usual way - by averaging values from adjacent pixels. In fact, next-door-but-one neighbours are used for a better effect. There are a couple of awful/cute bodges within the code, which have been amusingly commented. One involves plotting a circle on the screen and then reading bytes directly from the screen memory as a quick and nasty way of getting values for dithering.
You have mouse control - a circle is simply plotted at the current pointer position and this has a knock-on effect on the surrounding plasma. The size of the circle (and hence, the effect you have on the screen) depends on the buttons you hold down.
Sandman
The man behind the sand in this case appears to go by the name of Birky the Great. We have reason to believe that the writer of this desktop nicety may also be known as Stefa Kaznowska however. This may also just be an anagram of something very rude though.
The sand we mentioned is the fine sort that trickles delicately and decoratively through the narrow neck of an hourglass. Yes, alright, this is just another one of those animated hourglass modules. But it�s a nice one, so worth giving a try. Honest.
�Windoze �95 may be abominable� says Mr Great, �but it has a nice spinning hourglass (about the only good thing). I have managed to reproduce it using Jon Ribbens� !Hourmake (many thanks to him).
�The designs are best used on hi-res monitors or in hi-res modes because of their aspect ratios. They do work with lower resolutions, but they look a bit stretched. There are two types which can be used:
SpinGlass: The default is the larger, �as-is-on-the-PC� version of the spinning hourglass: it is highly detailed and has a longer animation cycle, but has no % indicator on it which can prove annoying to some users.
SpinSmall: This one can be loaded up as standard by editing the !Run file (just change the SpinGlass to SpinSmall in the only line of !Run if desired). It is a smaller version of the above but with less detailed movements and a shorter animation cycle. However, it can display percentages on a bar directly below.
Bot whan bugins my datty
... OR the next *info challenge! The rather strange title of this piece sums up the nature of what we�d like you to produce. We�re after nonsense - balderdash, cobblers, gibberish, hooey, twaddle, twattle and waffle! You must have heard the old adage �Garbage In Garbage Out� or GIGO for short, well we�d like to see examples of this, or, for that matter, NIGO or SIGO (Nothing In and Sanity In)! Oh, I seem to have got all carried away trying to explain this, but then again, maybe that�s just the, er, whatsit, um, yes, point. To be brief then, your brief (ha ha :) is to write a program that spews out textual nonsense.
It is perfectly allowable to have to feed text into the program to produce this nonsense, but this is by no means essential. A non-input program might contain a table of syllables or word parts that it joins together randomly, at the simplest possible level just printing out random alternating consonants and vowels produce some quite interesting results.
Given some source text, you could juggle the words around; swap letters in words; analyse sentence structure; build up statistical tables of adjacent letters.
�Readable� output is of course, desirable. It must at least sound convincing. Don�t think you have to be restricted to nonsense English either . . .
Snowmen conceal undoubted ill
We are allowing the use of external dictionaries on the condition that they are generally available, the obvious one is Computer Concepts� Impression Spell module which is freely available on the internet as part of the Impression Junior package. This is usually downloadable from their website: http://www.cconcepts.co.uk. It was also on the second Acorn Use CD ROM as:
CDFS::ACORN_U2.$.DEMOS.CCONCEPTS.JUNIOR.!JUNIOR.RMSTORE.!SPELLMOD
The rules:
1) Programs should not be longer than 20K
2) The winner shall be the program that produces the best results. Where �best results� are completely the opinion of the editors of this column.
3) Extra �sway� may or may not be given if the program has a suitably silly name and/or background as to the nature of its output
4) Four sample source texts can be found in the cover disc - This month�s *info, The Pied Piper of Hamelin, The Mad Hatter Tea Party from Alice in Wonderland and the first chapter of Tom Sawyer. Of course, you can base your program on any text, but we will not try out your program on any specific text.
5) The closing date of the competition is 21st June 1998. The winning entry and runners up will be published in the September 1998 issue
6) Entries to the usual address (below). Please mark your entry with a small sample of the output of your program. This will help us sift out our postbag and give the postman a good laugh.
Dog not spaceship
To give you a bit of a start, Four examples are included on the cover disc.
1) Incant produces mystical incantations - it simply alternates random vowels and consonants in words of random length: ocahu es evumaso palu nom om ovedo
Careful you don�t say this three times after midnight!
2) Headline is not really up to much as it stands - it simply picks random words from the Impression Spell dictionary, but it does give an example of how to access the modules� SWIs. (A further program ImpSpell, is a demo we published in December 1993 with further SWI examples. ) Even so, it does come up with some good ones: Fabian whistle embarrassment
A Christopher Morris-ism if ever there was one!
3) LooseVowel needs to be given a source file and all it does is random exchange vowels. It�s this that gave rise to Bot whan bugins my datty based on the Pied Piper text.
4) Finally, Gook. This is the most complex example here. It makes use of Impression Spell�s Fuzzy and Typo facility normally used for detecting spelling mistakes but here, given a source file, it replaces words with fuzzy or typo matches for them. It runs from the command line:
*Gook [-typo] [-fuzzy] [-anagram] <file>
If no �-� option is given both fuzzy and typo options are used. Be warned this is very slow even on a Strong ARM!
�Cave sole wipe,� the Marquis Hire sated in an encroaching tom. (From The Mad Hatter)
*Quit
Send all your utilities, graphical ditties, top tips, music (and whatever else you like really) to our usual address please:
*INFO, Acorn User, IDG Media, Media House, Adlington Park, Macclesfield SK10 4NP
or, e-mail us (including your real address please) at:
austarinfo@idg.co.uk
No submission should exceed 100K. Extras like screenshots and diagrams are always welcome, but try to keep e-mail submissions under 100K please. We always have limited cover-disc space, so will not be able to carry vast applications however nice they are.
You needn't include a letter but please put your name, address and program title on every disc and include a text file containing your name, address, disc contents and program details. An SAE will ensure your discs are returned. As always, only *info submissions please.

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000003e0  20 43 6c 6f 75 64 20 63  68 61 6c 6c 65 6e 67 65  | Cloud challenge|
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00000540  6f 20 6c 6f 6f 6b 20 6f  75 74 20 6f 66 20 6d 79  |o look out of my|
00000550  20 77 69 6e 64 6f 77 20  74 6f 20 73 65 65 20 65  | window to see e|
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00000590  6e 74 61 6c 6c 79 20 73  74 72 69 70 65 64 20 6c  |ntally striped l|
000005a0  61 6e 64 20 74 68 61 74  20 69 73 2e 20 0a 56 43  |and that is. .VC|
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00004ab0  2e 0a 0a 0a 0a 0a 0a                              |.......|
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