Tag Archives: open source

Video: C++ in Open Source Robotics


The robotics community is thriving in part due to flexible, powerful, accessible open source tools. The Open Source Robotics Foundation is a non-profit organization dedicated to the development, distribution, and adoption of open source software in robotics. We enable academics to focus on high-level research by re-using code, robotics startups to keep their development costs lean, and novice users to engage with powerful, complex robotics technology.

The first half of this talk centers around the future of ROS, the most widely used open source framework for robotics. After an overview of ROS transport, tools, capabilities, and the diverse ecosystem of ROS-compatible libraries, we will motivate the development of ROS 2: a major API change that targets new use cases for ROS, including embedded hardware, multi-robot systems, and real-time performance. Starting with an overview of the ROS 2 architecture, which includes a modern C++11 client library built on top of a generic DDS middleware interface, we will then focus on two core user code examples: publish/subscribe over a topic, and client request/service response. After this half of the presentation, attendees will understand C++ is a dominant language choice for robotics and why C++11 makes it easy to build a flexible, modular, Boost-free framework for communication and synchronization.

The second half of the talk focuses on Gazebo, a simulator for robotics that features support for multiple rigid body dynamics physics engines, high quality graphics, and a flexible C++ API. Simulation software like Gazebo is of utmost importance for developing controller algorithms, prototyping robot designs, and regression testing in challenging environments. It has been used in high­-stakes competitions such as the DARPA Robotics Challenge. This talk will delve into how different components of the simulator interact, from calculating the physical interactions between objects to rendering graphics with OGRE. We will also discuss upcoming features in Gazebo and the process of tailoring our development to our community.

Video: A Crash Course in Open Source Licensing


Open source software licenses are intended to provide a way for software authors to protect their own rights, and the rights of the users of their software, but many developers are unaware of how they work, why they are important, and how to apply them to their projects.

It may never have occurred to you, but software licenses are much like programs: they are developed to meet requirements, they live in a world of external influences and constraints, and they use documented techniques to solve problems.

In this session, the attendees will participate in a fun, interactive process to choose the components of a software license through real-world examples, with the goal of every attendee leaving with a basic understanding of the more important aspects of software licenses. Along the way they will learn the basics of copyrights and how they apply to software; what ‘derivative work’ and ‘distribution’ mean in these contexts; and many other useful concepts, including the most important differences between common licenses like the GNU General Public License family and the Apache 2 license.

Video: The Other Side of Empathy


In an industry that is so focused frameworks & tooling, we tend to lose sight of the people behind the products and how we work with them. I’ve found empathy to be a powerful resource while collaborating with teams inside companies and across the open source community. By breaking down The Other Side of Empathy, I will demonstrate how applying its principles to your development process will benefit the community and the products they create.

AngularJS – The Next Big Thing


via AngularJS – The Next Big Thing – CodeProject.

AngularJS is the next big thing for web applications.

AngularJS is a framework for client side web application development that brings with it the virtues of organization, structuring and the architectural pattern that helps make enterprise and data centric business web application development a breeze.

AngularJS is open source web application framework wrapped around native HTML/JS/CSS technologies. It augments the web development techniques with patters and practices that helps web application development become more mature and be able to handle more and more responsiblity that can (and should be) be shifted from the backend to the frontend.

AngularJS is “Super-powered by Google” and has a active community around it so anyone starting out with Angular can except to have a super charged ecosystem already present and one can quickly get started to building cool things and have their own “WOW” moments while using Angular.

Angular comes as a natural extension to the thinking and mindset of the modern web application developer. Angular brings the power where it belongs. Angularjs is built around design principles that supports scalability, maintainability, modularization at it core. It is best suited for thick client business web applications. It encourages the usage of best practices and patterns of development and thus drives the development of a high quality decoupled modular maintainable application. It serves as a solid base for large business web applications.

What Angular provides:

  • Architecture/organization patterns out of the box (MVC/SPA/DI)
  • View templating using plain-old HTML (no new templating language to learn) for creating dynamic views
  • Allows to extend HTML vocabulary to create new UI widgets/components
  • Avoids scattered DOM manipulation spagetti code
  • Inherent support for testing of the application
  • Provides modularity, loose coupling and reusability
  • Parallel development and comprehensible code due to virtue of MVC

Design goals (as on AngularJS guide):

  • Decouple DOM manipulation from application logic. This improves the testability of the code.
  • Regard application testing as equal in importance to application writing. Testing difficulty is dramatically affected by the way the code is structured.
  • Decouple the client side of an application from the server side. This allows development work to progress in parallel, and allows for reuse of both sides.
  • Guide developers through the entire journey of building an application: from designing the UI, through writing the business logic, to testing.

Open Sesame: Parse .NET SDK


via Open Sesame: Parse .NET SDK.

.NET SDK is also now completely open-source!

Following the concept from our previous blog post, .NET SDK adopts the pattern of separating a component into State and Controller. SinceState is simply a dumb object that stores data, with C# we can constructState directly with Object Initializer.

Experiment with ECMAScript 6 on BabylonJS with TypeScript 1.5


via Experiment with ECMAScript 6 on Babylon.js with TypeScript 1.5.

This article is part of a web development series from Microsoft. Thank you for supporting the partners who make SitePoint possible.

Since releasing babylon.js, the WebGL open-source gaming framework, a couple of years ago, we (with help from the community) are constantly exploring ways to make it even better. I’m definitely more than happy that we decided more than one year ago to switch over to TypeScript. For more on that decision, read why we decided to move from plain JavaScript to TypeScript for Babylon.js

Thanks to TypeScript, we’ve been able to improve the quality of our code, improve our productivityand create our fabulous Playground we’re so proud of: http://www.babylonjs-playground.com/, which provides auto-completion in the browser! We’ve also been able to welcome some new team members coming from a C# background and few JS skills with no pain. But thanks to the TypeScript compiler, we can also test the future without rewriting a single line of code!

We are still coding babylon.js using Visual Studio and TFS while pushing in a regular manner our code to the github repo. By upgrading our project to Visual Studio 2015 RTM, we’ve been able to upgrade it toTypeScript 1.5.

Starting with Johnny-Five on the BeagleBone


via Starting with Johnny-Five on the BeagleBone – MORPHOCODE.

As embedded systems are becoming smaller, cheaper and more powerful, it is getting easier to bridge the gap between the physical and the digital world. We are now living in increasingly data-rich environments, largely due to the growing number of connected “things” we interact with on a daily basis. The available data can be used to better understand city dynamics and improve the quality of life we have. Projects such as the Array of things and Sense your City use DIY sensors to provide citizens with information about their surroundings.

Arduino, Raspberry Pi and Beagle Bone are among the most popular open-source hardware platforms that provide a great starting point for beginners.