Jun 262012

EPhysics, a fresh new library is reaching Enlightenment project’s SVN repository today. It’s a wrapper between Bullet Physics and EFL to add physics effects in a simple way.

It’s possible to checkout it from our SVN repository:

svn co http://svn.enlightenment.org/svn/e/trunk/ephysics

The video covers the tests that are included in our source code, as one can see the code is pretty simple to an EFL programmer and we expect them to adopt EPhysics to create their next splash screen, transition effects and even more games!

Why Bullet Physics?

Bullet Physics is a very well established physics engine. It’s stable, fast and simple to use, licensed under a permissive license and packaged for most distributions. It’s used by many big companies for games and movies such as Sony, Disney, Activision and Rockstar Games.

How is it structured?

It’s possible to create a World and add many Bodies, that can be represented by Evas Objects. These bodies have physical attributes such as mass, friction and restitution and shape. They may receive impulses and collide between them. Events occur when something happens, as a body moving, two bodies colliding, or the entire world getting halted (all the bodies stopped). The following diagram should help to make it all a bit clearer.

Everything is documented using doxygen, so you can build documentation with:

$ make doc

or access it online here. It’s just a temporary place until it reaches our project’s server.

And much more is coming. On our roadmap we have:

  • Create collision shapes from image;
  • Helpers to help the physics inexperienced people to define attributes and use it;
  • Sandbox tools to try different materials / properties in a live, what-you-see-is-what-you-get way;
  • Deform objects;
  • Adding camera concept (POV);
  • Creating a game

A more extensive list can be found at TODO file. Adding support to physics effects on Edje is planned as well, making it possible to configure physics environment and reacting to events.

So if you liked that, give it a try. I’ll be glad to help. Bug reports, reviews, feature requests and patches are very welcome. I’ll try to post a tutorial on creating applications with EPhysics soon.

May 152012

I’m just back from San Francisco, where Tizen Developer Conference 2012 took place, from May 7th to 9th. According to the organization, more than 700 people attended, and I had the opportunity to talk to many developers from different companies and projects. There were contributors of WebKit, BlueZ, ConnMan, oFono, and surely, the Enlightenment Foundation Libraries. And I finally met Raster, with whom I discussed a bit about EPhysics, a new library that will make developers lifes easier when physics are required in a software, and features to be implemented on Edje.

I’ve given a talk about our beloved layout library, Edje, on the last day of the event. Slides of “Creating Fancy User Interfaces with Edje” presentation can be read below or downloaded from here. Examples can be found here.

ProFUSION sponsored the conference and we’ve shown three demonstrations of EFL usage on products we’ve developed in our booth. Our showcase was composed by Electrolux Infinity I-Kitchen Fridge, Zodiac’s In-Flight Entertainment System demo, and Endeavour browser. All of them based on the EFL and the last one using the EFL port of WebKit as well. I’ve participated on the development of these softwares, so I was really proud of attendees’ interest on them.

EFL adoption to compose Tizen platform’s core is a nice chance to our community to attract more developers and to become even more relevant. Sure, releasing e17 soon would just add yet more momentum 😉

EFL at LinuxCon Brazil

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Nov 232011

Past week, I’ve attended LinuxCon Brazil as speaker. It took place in São Paulo, 17 and 18 November 2011. Despite not having a huge number of attendees, it was definitelly great in presentations quality.

Keynotes were interesting, relating the 20 years of Linux under many point of views, and previewing Linux’s future for the next 10 months ;). Linus Torvalds confidence about Secure Boot failure drawn my attention. He defends his point considering users need, and want freedom, even in a unconscious way.

The event was plenty of good talks, as the given by Lennart Poettering, about systemd, a system and service manager, which I only had heard about previoulsy, so it was nice as an opportunity to learn a lot about it, and GNOME 3 presentation, given by Tobias Muller. It always worth to see what competitors are doing =D.

I’ve presented “Application Development using Enlightenment Foundation (EFL)” together with my co-worker Rafael Antognolli. We’ve made an overview of the libraries, webkit, gave some development tips, and talked about some products done at ProFUSION using EFL, as Electrolux’s I-Kitchen softwares, and Endeavour, a browser under development, sponsored by FINEP. Below you can see slides of our presentation, also available as PDF:

Other 3 talks were given by ProFUSION guys. Demarchi explained how to become a Free Software developer, focused on students and other newcomers. Gustavo Barbieri presented “Tips and Tricks to Develop Software for CE product on Low-End Hardware”, and “Demystifying HTML5″ with Sulamita Garcia (Intel). By the way, when the event started, was announced that ProFUSION became a member of Linux Foundation. Congrats!

Another nice point about attending this conference was the opportunity of knowing some guys from IBM, INDT, Samsung, and talking to some University colleagues I didn’t meet by the last 4 years or so.