jihem [Lexaloffle Blog Feed]

Conway's game of life

Wed, 01 Jun 2022 17:55:27 UTC

conway_s_game_of_life

by jihem

[Click to Play]

Conway's game of life
See https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life

Interesting use of the map with mget, mset and memcpy.

Hill cipher

Wed, 11 Mar 2020 17:46:07 UTC

In classical cryptography, the Hill cipher is a polygraphic substitution cipher based on linear algebra. Invented by Lester S. Hill in 1929, it was the first polygraphic cipher in which it was practical (though barely) to operate on more than three symbols at once. The following discussion assumes an elementary knowledge of matrices.

https://en.wikipedia.org/wiki/Hill_cipher

I have added the space after the 'Z' in the alphabet so each symbol is represented by a number modulo 27.

vectfont 1.0

Fri, 24 Jan 2020 11:22:24 UTC

vectfont 1.0

by jihem

[Click to Play]

This is a custom font library. You can create your own font. Just use the matrix to set the drawing of the char. Use a dot a the begin of each line. The drawing for the letter 'F' can be '.PAC.FG'. Put the pen in P then a line to A and from A to C. Next, put the pen in F and draw a line to G.

f='.pac.fg'

Sampe of use:

function _draw()
 cls(5)
 font:drawtext(3,10,'t⬇️his is a way to create custom',7)
 font:drawtext(3,20,'⬇️vector ⬆️font.',7)
 font:size(4,5)
 font:drawtext(11,52,'s⬇️ize matters!',1)
 font:drawtext(10,50,'s⬇️ize matters!',14)
 font:size(2)
 line(55,113,127,113,8)
 font:drawtext(56,105,'⬇️picoscope101.fr',7)
end

Greta

Wed, 18 Dec 2019 19:37:21 UTC

greta

by jihem

[Click to Play]

This game has be made for Ludum Dare 45 : “Start with nothing”. You’re the Spirit of the Nature. You have nothing and should collect with the appropriate tool droplets of water, sun and earth to feed the plant.

Use arrows to move and [x] key to change the current tools.

Could you help Greta to grow? ( the name of the flower)

(Done by @s_yanik & @wdwave)

PICO-8 conference

Sun, 10 Mar 2019 21:56:41 UTC

Save the date! june 9th, #pico8 conference at the Bordeaux Geek Fest 2019 (France) - Arthur Dent Club
URL Official french announcement

Stones

Sun, 02 Dec 2018 17:09:42 UTC

stones

by jihem

[Click to Play]

You�re the Spirit of the stones and have to collect (and sacrifice) them.

Will you find the path ?
Could you resolve the gods challenge?
Is 1min16 is enough for you to succeed ?

This my compo for LD-43 : 'Sacrifices must be made'
https://ldjam.com/events/ludum-dare/43/stones

VCT 2 (two players splitscreen)

Fri, 25 Aug 2017 13:06:59 UTC

VCT 2 (two players splitscreen)

by jihem

[Click to Play]

This a code sample of splitscreen in pico8 to allow 2 players to play on the same screen (and go where they want).
Enjoy :-)

BAT

Fri, 25 Aug 2017 12:51:55 UTC

BAT

by jihem

[Click to Play]

This cartridge is an exploration about 'how to show things to the player'.
Arrow keys to move, [O] button (usually Z/W key on qwerty/azerty keyboard) to change the view mode.
Sometime, I just make pico stuffs for the pleasure to scratch my head... :-)

009 - Double-acting press button 2.0

Fri, 02 Jun 2017 02:51:12 UTC

009 - Double-acting press button 2.0 2

by jihem

[Click to Play]

These cartriges show how to manage double-action buttons.
Two methods for the same result. The version 2.0 is better.
In hope this may helps at least the guys who were asking for it ;-)

009 - Double-acting press button 1.0

by jihem

[Click to Play]

009 - Double-acting press button

Sun, 21 May 2017 10:32:28 UTC

009 - Double-acting press button 1.0

by jihem

[Click to Play]

I was exploring a way to manage double-acting press button.
In hope this helps.
Have a nice day :-)

Further pico : picoscope 2017 workshop

Fri, 31 Mar 2017 08:08:20 UTC

Hi,

I'm working on the topics for picoscope 2017 (in april). I love to code, so I will speak about about tables, object oriented programming, using functions in variables, converting arguments to an array (and an array to arguments), events...
You will find samples in these cartridges.

The last event we were involded, was a great success (Roc'n Stick in Niort, France).
Pictures of the PICO-8 workshop, march 25th

I hope I will see you in the next coming weeks ;-)

Further pico : picoscope 2017 workshop

by jihem

[Click to Play]

Events...

Further pico : picoscope 2017 workshop

by jihem

[Click to Play]

Pack... Unpack...

Labyrinth

Sun, 05 Mar 2017 13:41:45 UTC

Labyrinth 1.0

by jihem

[Click to Play]

This a sample of the object LAB used to generate a labyrinth.

=> Random path merge

fr.wikipedia.org

i_editor 2.0 + manual(english+french)

Wed, 28 Dec 2016 14:06:03 UTC

i_editor 2.0

by jihem

[Click to Play]

I_EDITOR is a programming game. The goal is to write simple scripts to reproduce a drawing on screen. The commands used in the scripts move a pointer (�turtle�). The pointer has a pen, which can be up or down. When the pen is down, each move lays a print. There are additional instructions to make calculus, evaluate conditions and call previous declared sequences. The syntax and semantic are organized in language called I_CORE.

Now you can download the manual !

Le manuel en français est disponible.

Try to reproduce the blueprints or play with the sandbox...
I will add a score and more blueprints soon ;-)

In the main menu:
Choose a blueprint or the sandbox (up/down, x)

In the editor:
Choose the command in the first column (up/down, x) or return to the main menu (o)
Change column (left/right)

Change the value in the second colum (x, then left/right to decrease/increase)
Delete instruction in the second colum with (o)

Have a look on i_core thread to have more explanation about the language "I".

I will make a tutorial soon and post a link and additional information here.

Sample

:A 20 FD 90 TR ; :B 1 - # A ?B ; 4 B

CLR : clear
<CP : copy from clipboard
>CP : copy to clipboard

Copy the line below into the clipboard

:a 10 fd 90 tr ; a a a a

Paste in PICO-8, then activate <CP

/!\ WARNING:
Clipboard functions (<CP,>CP) aren't working in HTML exported cartridge.
Copy from notepad (text in the html browser may contain tag or additional characters)

i_core

Fri, 23 Dec 2016 14:04:13 UTC

i_turtle v1.2

by jihem

[Click to Play]

WARNING : This is not (yet) a game. It's a strange thing (only) for programers.

This cartridge includes i_core and the turtle extension.
It shows how to:

bind a personal extension (turtle object, turtle binding) to the language core engine,
initialize the external extension and call its methods (from PICO-I and i_core)
pass parameters from PICO-8 to i_core (N).

The turtle extension includes the following commands:

FD forward, 20 FD
BD backward, 20 BD
TR turn right, 90 TR
TL turn left, 90 TL
CL change color, 1 CL
PU pen up, PU
PD pen down, PD
TO go to, 10 10 TO
HD head to (0 right, 90 top, 180 left, 270 down), 0 HD

Sample :

':loop 20 fd <a tr 1 - # ?loop ; :side >n 360 <n / >a <n loop ; cls 4 side'

Have fun ;-)

i_core 1.0

by jihem

[Click to Play]

This is the core engine of a language ('I') and its virtual machine (all of this in PICO-8).
You can extend this engine (see how _SHW or _CLS are implemented).
You can create synonyms for a simplier use (see ADD and +).

The programs must be writen in a line. Terms are separated by space.

The engine is stack based (like forth): '5 4 + .' => shows 9

The operators + - * / and flr function are available.
The '#' duplicates the last value (of the stack).

You can evaluate (5 + 4) (3 + 2) with '5 4 + 3 2 + .' => 45

Create a sub function

:NAME <sequence of instructions> ;

':A 5 4 + ; :B 3 2 + ; A B * .' => 45

You can call the sub function NAME with its NAME (see A and B in the sample).

Create SQUARE and evaluate 3^2:

':SQUARE # * ; 3 SQUARE .' => 9

Conditional call

?NAME

If the last value in the stack isn't zero it calls NAME else it goes to the next instruction.

This is usefull to create tests and loops:

':SA # . 1 - ; :LP SA # ?LP ; 5 LP 0 .'

Count down from 5 to 0 (then stop).

You can use variables:
>NAME (load value from stack)
<NAME (push value in the stack)

'1 >A <A <A + .' =>2

You can use many :EVAL call to enter your program (one line per call).
You can use as many i_core engines as you want at the same time (object).
You can execute the whole program (:EXEC) or run it :STEP by step.

:STATE returns 3 when done. You can restart with :STATE(0).

If you have read the description so far, you may have a question.
This sounds crazy... So, why?

I'm working on two games. In the first you have to build a program by stacking graphic items to draw on screen to replicate a drawing with the minimal amonth of items. In the second, some robots fight together using genetic algorithms to evolve (by sharing part of their own code to create new ones).

I think I can share this library and my interest in doing this.

jihem
picoscope101.fr where mad things come to life...

picoscope 2017, April 22th-23th

Mon, 10 Oct 2016 15:16:27 UTC

Picoscope2016 is coming in April 2017

Hi,

We are organising a PICO-8 coding party in France.
You are welcome to join us in the workshops.

=> Website (near 30 places remaining)
=> Follow us on facebook and/or twitter

jihem (@wdwave)

Rotating a sprite around its center

Sun, 12 Jun 2016 10:25:09 UTC

Rotating a sprite around its center 0.1 0.1.1

by jihem

[Click to Play]

A howto about rotating a sprite around its center...
Use left and right arrows to spin the sprite.

VCT

Sat, 28 May 2016 11:34:50 UTC

VCT 0.1

by jihem

[Click to Play]

Hi,

I'm on this since a couple of hours done on several days. I have a lack of time for the jam.
I will improve as I can but I submit like it is. I hope you will be kind enough to play with it.

Follow the radar indication. Shoot but don't be hurt. You have only one life.
The levels change each time the game is played.
Regards,
jihem

Object-Oriented Programming (sample 0.1.6)

Mon, 18 Apr 2016 13:04:55 UTC

Object-Oriented Programming (sample 0.1.6) 0.1.6

by jihem

[Click to Play]

Hi,
With PICO-8 0.1.6, you can now programming using OOP design. This sample use setmetatable to build a constructor.
Regards,
jihem

Le manuel en fran�ais :-)

Sun, 17 Apr 2016 17:29:28 UTC

Commenc�e, d�laiss�e et finalement termin�e...
Voici la documentation en fran�ais de PICO-8 : PDF.
Je vais progressivement compl�ter ce document avec mes notes, remarques et projets illustrant les diff�rentes notions pr�sent�es (et d'autres selon l'humeur du moment).
Bonne lecture,
jihem

Picoscope2016 is coming in May 2016

Sat, 16 Apr 2016 03:39:49 UTC

Hi,

We are organising a coding party in Nantes (France). You are welcome to join us in the workshops and for the game jam. All of this made with PICO-8.

Please, have a look on the flyers : flyer (english), flyer (french).

=> Website (Registration closed)
=> Follow us on facebook and/or twitter

jihem (@wdwave)