User:Walter

Walter Bender

I was at OLPC for several years and now I am a volunteer on the project. My home page can be found here: [1]

Email: walter AT sugarlabs DOT org

To do

• get Frame test set up in Peru/Uruguay/Paraguay</srike>
• New Activity templates

Much of the information that is consistent across activities can be held in activities.s.o. (dfarning 22:28, 16 June 2008 (UTC))

• Follow-up with Linux Foundation
• Draft membership agreement for Sugar Labs
• rebase Turtle Art on SVG
• ask SFC for pointers to lawyers in SA
• start writing NSF/USAID proposal
• local-labs proposals
• USF proposal

Done

• New Getting Started Guide (See The Sugar FLOSS Manual)
• Add ParserFunctions to Sugar Labs mediawiki
• Draft rules of governance for Sugar Labs
• Start Community-News Sugar Weekly Digest list
• CoSN proposal
• rebase Gmail on new Browse
• Finalize arrangements with SFC
  • Incorporate Sugar Labs

Recent writing about Sugar and learning

• Confessions of a fundamentalist (Part 1)
• Confessions of a fundamentalist (Part 2)
• A page from the Hilbert playbook
• Media, Mathematics, and Mallard Fillmore

(I also blog the weekly Sugar Digest.)

The slides from a talk I gave about Sugar at the Women2Woman conference are here and here.

gitorious

I'm documenting the process of moving Turtle Art to git.sugarlabs.org. Marco has posted instructions here, but of course I didn't have them at hand when I started. So far:

1. I created an account on git.sugarlabs.org by selecting the register link on the home page.

2. I created a new project by selecting the new link on the project page.

There were lots of questions I didn't know the answer to, such as what tags I should be using, but you can answer most of them after the fact... I did screw up (at least) one thing: I hadn't noted that the project name needs to be all lowercase... but it was easy to change.

3. I am not sure how to push my project.

Morgs pointed out that if you go to http://git.sugarlabs.org/projects/turtleart/repos/mainline it tells you a "push" URL.

git remote add origin gitorious@git.sugarlabs.org:turtleart/mainline.git
# to push the master branch to the origin remote we added above:
git push origin master 
# after that you can just do:
git push

4. I finally looked at Marco's instructions and so I added the pootle user as a committer.

5. Where should I put the .xo bundle? And the source tarball?

there is a script for generating and posting changes that covers all of these details.

I had a bit of trouble pushing a new change to gitorious today. I had to use the --force flag for some reason. We suspect it may have something to do with the fact that one of the files I pushed is a binary file. Will report back what I find. (Seems to work fine when there are no binary files to add/push.)

git push -fv

I have been trying to use release.py with no luck so far either. (It has a dependency on the feedparser python library, which is easy enough to install.) It complained about a mismatched tag, so I used the --version flag to force the same version number as in my activity.info file. Then I got this error:

nothing added to commit but untracked files present (use "git add" to track)
Traceback (most recent call last):
 File "../release.py", line 325, in <module>
   main()
 File "../release.py", line 314, in main
   release.tag()
 File "../release.py", line 170, in tag
   subprocess.check_call(['git', 'commit', '-a', '-m' , '%s' % message])
 File "/usr/lib/python2.5/subprocess.py", line 462, in check_call
   raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['git', 'commit', '-a', '-m', 'Release 26']' returned non-zero exit status 1

Is this because I did the git commit and git push by hand before running release.py?

Sandbox

• User:Walter/sandbox
• User:Walter/favoriteslayout.py
• User:Walter/favoritesview.py
• User:Walter/View-mylayout.svg
• Patching Turtle Art

Spiral Home View

Fermat Spiral

Modifying TurtleArt

Floss Manual

<img src=""/> <style>

@import url("http://en.flossmanuals.net/bookstore/bookstore.css");

</style>

<script src="http://en.flossmanuals.net/bookstore/bookstore.js" type="text/javascript"></script>
<script type="text/javascript">
 FM.init({"paging":true,"preferred":["OLPC LAPTOP USERS GUIDE","SUGAR USERS GUIDE"]});
</script>

Portfolio

I am making a "TurtleArt: inspired portfolio tool.

first sketch of the portfolio tool

another sketch of the portfolio tool

Turtle Art → Logo

I added a "view source" for Turtle Art that exports Logo.

a Turtle Art project

the UCB Logo version

Some procedures for setting up the palette and the shade functionality:

to tasetpalette :i :r :g :b :myshade
make "s ((:myshade - 50) / 50)
ifelse lessp :s 0 [
make "s (1 + (:s *0.8))
make "r (:r * :s) 
make "g (:g * :s) 
make "b (:b * :s)
] [
make "s (:s * 0.9)
make "r (:r + ((100-:r) * :s)) 
make "g (:g + ((100-:g) * :s)) 
make "b (:b + ((100-:b) * :s))
]
setpalette :i (list :r :g :b)
end

to rgb :myi :mycolors :myshade
make "myr first :mycolors
make "mycolors butfirst :mycolors
make "myg first :mycolors
make "mycolors butfirst :mycolors
make "myb first :mycolors
make "mycolors butfirst :mycolors
tasetpalette :myi :myr :myg :myb :myshade
output :mycolors
end

to processcolor :mycolors :myshade
if emptyp :mycolors [stop]
make "i :i + 1
processcolor (rgb :i :mycolors :myshade) :myshade
end

to tasetshade :shade
make "myshade modulo :shade 200
if greaterp :myshade 99 [make "myshade (199-:myshade)]
make "i 7
make "mycolors :colors 
processcolor :mycolors :myshade
end

to tasetpencolor :c
make "color modulo round :c 100
setpencolor :color + 8
end

make "colors [
100 0 0 100 5 0 100 10 0 100 15 0 100 20 0 100 25 0 100 30 0 100 35 0 100 40 0 100 45 0 
100 50 0 100 55 0 100 60 0 100 65 0 100 70 0 100 75 0 100 80 0 100 85 0 100 90 0 100 95 0 
100 100 0 90 100 0 80 100 0 70 100 0 60 100 0 50 100 0 40 100 0 30 100 0 20 100 0 10 100 0 
0 100 0 0 100 5 0 100 10 0 100 15 0 100 20 0 100 25 0 100 30 0 100 35 0 100 40 0 100 45 
0 100 50 0 100 55 0 100 60 0 100 65 0 100 70 0 100 75 0 100 80 0 100 85 0 100 90 0 100 95 
0 100 100 0 95 100 0 90 100 0 85 100 0 80 100 0 75 100 0 70 100 0 65 100 0 60 100 0 55 100 
0 50 100 0 45 100 0 40 100 0 35 100 0 30 100 0 25 100 0 20 100 0 15 100 0 10 100 0 5 100 
0 0 100 5 0 100 10 0 100 15 0 100 20 0 100 25 0 100 30 0 100 35 0 100 40 0 100 45 0 100 
50 0 100 55 0 100 60 0 100 65 0 100 70 0 100 75 0 100 80 0 100 85 0 100 90 0 100 95 0 100 
100 0 100 100 0 90 100 0 80 100 0 70 100 0 60 100 0 50 100 0 40 100 0 30 100 0 20 100 0 10]
make "shade 50
tasetshade :shade

to tasetbackground :color :shade
tasetshade :shade
setbackground :color + 8
end

The project:

to ta
clearscreen tasetbackground 21 100 setpensize 25.0 make "box1 0.0 
repeat 300.0 [ tasetpencolor xcor / 6.0 tasetshade heading forward :box1 right 91.0 make "box1 :box1 + 1.0 ] 
end

ta

Turtle Art variables

Following the lead of Luis Michelena, I've added named blocks and stacks. I plan to add push and pop next, which should greatly expand the range of possible constructions.

to square

HBS-style analysis

• our points of difference
• our points of parity
• their points of difference