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Mark Moissette (ckaos)
Works at Youmagine
Attended IUT Amiens
Lives in Karlsruhe,Germany
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Mark Moissette (ckaos)

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Hi folks! To those who wonder why I rarely post/ comment on stuff anymore, well : 4 month of being semi continuously sick...( never the same stuff twice...) kinda reduced my social and tech skills...so put simply " sorry". Hope it changes soon.
Cheers!
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Oh sad to hear this. La vache... tu n'as pas moyen d'aller te réfugier en montagne quelque temps? Bon courage :s
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Mark Moissette (ckaos)

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finally !
 
All the font files (TTF's) served by Google Fonts are now on GitHub: https://bit.ly/19frWcC - hooray for open source!
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Mark Moissette (ckaos)

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Given all the issues with licences for 3d printed files, this is a very important proposal/draft , please let your voice be heard about this !
 
RFC: Help us draft a 3D Printing license that fits today's world of sharing inventions. Comment here:
http://buff.ly/1LRlJ4g #3DPL
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Mark Moissette (ckaos)

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Very interesting non electric, non electronics hydroponics grow system with 3d printed parts 
http://www.foodrising.org/
http://www.foodrising.org/Float-Valve-Assembly-Instructions.html

Will likely build a small version to see .

Sadly some aspects of it (not the design itself, taking a closer look before I make up my mind) are just off:
- "open source" but you have to register  to their mailing list first
- "open source" but they mention having "defensive patents"
- "open source" BUT CC non commercial...( I am always torn about this last one, so less important).

CC +Nils Hitze +Jason Ray 
How to assemble the Food Rising Mini-Farm Float Valve
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+Jason Ray for the downloads, I signed up to his "newsletter" or whatever and the files are downloading fine (edit : had to refresh the browser a few times before it acknowledged my "signing up")
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Mark Moissette (ckaos)

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Hi folks , I would really love some "mental" help and feedback on this subject:
namely: a format for describing a hierarchy of parts , and constraints/joints : 
- right now I have a tree like data structure something like 
 {
          "uid":"24f9203a-c5ed-4174-a446-e82597d28dbc",
          "partId":0,
          "name":"Hand",
          "position":[10,0,0],
          "children":[
              {"uid":xxxxx
                "partId":1,
                "name":"Thumb",
                 "rotation":[37.2,0,10],
                 "scale":[1,1,2]
              }
           ]
        }

- but I also want to be able to define joints (such as prismatic, revolute, etc) ,  and their limits basically, something very similar to the URDF format (http://wiki.ros.org/urdf/XML/joint) .

The format i am working on is still intended to
- be simple
- json based
- and also needs to handle simple groups etc (which from what I gathered so far , are not handled  all that well by the urdf format)
- multiple parents would be cool , but then again that potentially means more complex data structures (graphs)

- so my questions : 
  * does anybody who have worked with URDF know if it handles part trees as well ? (not clear from the documentation) 
 * are there any other similar efforts already underway that I have missed ? 
 * what are common issues when dealing with these kind of data structures ? 
* any feedback at all is also welcome , thanks !
(If it is all confusing, blame my current cold)
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Oh, right the source code is where they get pulled together. Here is the tester class for the trobot master. https://github.com/NeuronRobotics/java-bowler/blob/development/test/java/src/com/neuronrobotics/test/kinematics/TrobotDisplayOnly.java

The DHParameterKinematics class uses the Denavit-Hartenberg system https://www.youtube.com/watch?v=rA9tm0gTln8 to define links. the link ordering is crappy, its semantic to the XML (shame on me) in that the order of the links as they are defined in the xml is the order from base to tip of a chain of D-H links. I need to get around to adding a link order tag to that thing...

The link section is the mapping between the physical system and engineering units. It also specifies the limitations in the physical systems units, this is because the physical limitations should be absolute to the physical layer, since zeroing of the engineering units can mess with the limits, the limits are therefore implemented in the layer below. 

The D-H parameters are properties of links, since links can be arranged in non-d-h definable systems. There are a few complex linkage kinematics implementations that do not use d-h definitions. The AbstractKinematics https://github.com/NeuronRobotics/java-bowler/blob/development/javasdk/NRSDK/src/com/neuronrobotics/sdk/addons/kinematics/AbstractKinematicsNR.java engine is one where the user can define arbitrary f-k and i-k implementations, and handles the wrapping of links in engineering units, the event system of conversions back and forth, interacting with the links, and even task-space path planning. see the enclosing directory for the link implementations.

I apologize for the lack of formal documentation on the AbstractKinematics system and D-H implementations, it is very new and a big project to migrate to open source quickly. I am willing to offer personal assistance implementing it with new users if you help with documenting as we go ;) (ill help anyway)

Documentation of the core Bowler Platform can be found here http://www.neuronrobotics.com/tutorials/ and some additional code examples on the new documentation site we are tryign to migrate over to: http://neuronrobotics.github.io/Java-Code-Library/Connection-Dialog-Example/

The hexapod was an early prototype and needs to be migrated over to the full LinkEngine system. It is more a rough draft of multi-kinematics-chain systems. It has a generated 5 down, one up smooth walk engine that will take any arbitrarily defined hexapod kinematics file. It uses the DyIO to coordination motion between all the servos for real time synchronization, and all kinematics takes place at the Java level. 
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Mark Moissette (ckaos)

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reading lots and lots of pro immutability articles (seems to be a trend these days), and I still go "meh", both mutable & immutable objects have their advantages ( and as some people say, mutable behavior is closer to how we perceive the real world, so easier to model & understand).

What am I missing ?
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I will also note that immutability ties closely to the more functional styles of programming, and as more concurrent distributed systems are built on functional style languages that have come out recently I see immutability being a core concept for teams working in that space.
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Mark Moissette (ckaos)

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Lots more progress on aquaponics setup !
- box corners printed
- box edges assembled
- drain system modeled ( a heavilly modified fork of   +Vik Olliver 's Hydroponic drain)
- drain system printed and put into place (testing for now)
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+Reza Issany c'est open source comme d'hab :D

+Jason Ray no need to be , I am applying the same principles as you " less projects, more progress on the projects that are left"
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Mark Moissette (ckaos)

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Join the 3DPL discussion. Let us know if you want to participate in the hangout, so we can add you!
https://plus.google.com/events/cntm9mtvvqjr7bok6rm9qleif2c
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Mark Moissette (ckaos)

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Left way to soon, RIP, and may he live again on top of turtles and elephants.
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Mark Moissette (ckaos)

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Yeah ! first water tightness testing of printed seal/outflow etc for aquaponics grow bed: all fine after 24 h

Cad files etc here (in cad folder) (work in progress , pictures and documentation coming soon!
https://github.com/kaosat-dev/yatoopi

#aquaponics  
#yatoopi  
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Can't wait to get to do this.... One day...
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Mark Moissette (ckaos)

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Pond liner cut (for water proofing)
Media guard (prevent clay pellets from obstructing the way to the outflow) modelled and printed !
Almost there !
#aquaponics
#yatoopi
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Mark Moissette (ckaos)

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The more I write Javascript , the more I love Python ...
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Hey +Miguel Sánchez,  at least I did not say I love a snake like +Mark Moissette did.
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Have him in circles
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Old English Workshop's profile photo
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Mark Moissette (ckaos)'s profile photo
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Adrian Hant's profile photo
Melanie Perry's profile photo
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Rizaneh Shahram's profile photo
Work
Occupation
Web App Engineer
Skills
Code (Python, Javascript, Coffeescript, C++)
Employment
  • Youmagine
    Web App Engineer, 2014 - present
  • Inra
    BioInformatician/ Python Developper, 2011 - present
    Python developper/ bio analyst
  • Micro Application
    QA/ C#.net Dev, 2006 - 2009
    QA Manager/C#/Nsis Developper
  • Ciblo.net
    Web dev, 2004 - 2004
    Web developper
  • KIT
    Dev/3d printer specialist, 2014 - 2014
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Karlsruhe,Germany
Previously
Paris, France - Paris, France - Lyon, France - Köln, Germany - Amiens, France
Story
Tagline
Repraper, Pythonista, Tinkerer, geek
Introduction
Programmer (Python), tinkerer (Reprap, Arduino etc), curious (biology, tech etc) your (almost) garden variety nerd!
Bragging rights
Have 1 kid
Education
  • IUT Amiens
    Informatics, 2003 - 2004
  • CNAM
    Informatics, 2009 - 2011
  • CNAM
    Biochemistry, 2009 - 2011
Basic Information
Gender
Male
Other names
kaosat.dev, ckaos
Mark Moissette (ckaos)'s +1's are the things they like, agree with, or want to recommend.
Drucksensor - 12,7mm - Watterott electronic
www.watterott.com

Produktbeschreibung. Drucksensor für einen Bereich bis 100g - 10kg. Der Druck auf den Messpunkt bewirkt eine Änderung des Widerstandes. Voll

FabLab Karlsruhe
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Something big is coming...

3ders.org
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In-depth resources of 3D printing and rapid prototyping technology

three.js
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JavaScript 3D library

RepRap Magazine
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Practical exploration of 3D printing.

2013 review of developments, 3D Printing book release and more challenges.
richrap.blogspot.com

#2014 I missed doing my annual roundup of 3D Printing adventures before Christmas, so here it is, with some plans and updates for 2014. Firs

Luca Parmitano
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European Space Agency astronaut currently orbiting Earth!

Coffeescad: 3D-Druckmodellierung im Browser - Golem.de
www.golem.de

Mit seinem Projekt Coffeescad will Mark Moissette nicht nur eine einfache Modellierungsanwendung für 3D-Drucker erstellen, sondern gleichzei

FabCon-3D
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Personal Fabrication, 3D, 3D-Drucker, 3D-Maker, Convention

The Humble Indie Bundle #4 (pay what you want and help charity)
www.humblebundle.com

Pay what you want for a collection of awesome games, and help support two charities. All of the games are DRM-free and support Mac, Windows,

OctoPrint
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A responsive web interface for 3d printers

OpenJSCAD.org
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OpenSCAD + JavaScript = OpenJSCAD.org

The electric revolution in R/C planes hits full-size aviation - DIY Drones
diydrones.com

It's been amazing to watch how computer technologies have revolutionized the R/C aircraft world. The combination of high-efficiency brushles

Behold Tharsis Tholus, Mars' technicolor dream volcano!
io9.com

You're looking at an image of Tharsis Tholus, an extinct Martian volcano that by Earthly standards is positively massive: towering 8km above

Planetary Annihilation
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Planetary Annihilation - a new RTS by Uber Entertainment

Free Template Alissa: Responsive Bootstrap Coming Soon Page | AZMIND - F...
azmind.com

Alissa: responsive coming soon template built with Twitter Bootstrap. It comes with images slideshow, countdown timer, AJAX email subscripti

3dDinge3dDinge
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Dein Shop für 3d DruckDein Shop für 3d Druck