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OpenFrameworks Essentials

OpenFrameworks Essentials

By : Denis Perevalov
5 (7)
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OpenFrameworks Essentials

OpenFrameworks Essentials

5 (7)
By: Denis Perevalov
Buy this Book

Overview of this book

If you are a programmer, visual artist, or designer with experience in creative coding, and want to use openFrameworks to create fun, stunning, and interactive applications, this is the book for you. Basic knowledge of programming languages, such as C++, Java, Python, or JavaScript, will be enough to proceed with the book.
Table of Contents (13 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Getting Started with openFrameworks
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1. Getting Started with openFrameworks
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What is openFrameworks?
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Installing openFrameworks
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Running your first example
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The video synthesizer application
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Summary
2
2. Creating Your First openFrameworks Project
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2. Creating Your First openFrameworks Project
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Creating and running a new project
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Discovering the project's code structure
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Setting up the screen
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Centering the coordinate system
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A simple drawing
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Geometric patterns
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Summary
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3. Adding a GUI and Handling Keyboard Events
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3. Adding a GUI and Handling Keyboard Events
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Creating a GUI using the ofxGui addon
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Implementing a simple GUI panel with sliders
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Implementing the autosave feature
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Creating groups of controls
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Implementing a checkbox, a color selector, and a 2D slider
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Handling keyboard events
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Implementing the matrix pattern generator
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Summary
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4. Working with Raster Graphics – Images, Videos, and Shaders
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4. Working with Raster Graphics – Images, Videos, and Shaders
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Raster images in openFrameworks
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Drawing an image file
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Playing a video file
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Grabbing a live video from a camera
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Mixing layers using additive blending
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Creating the video effect with a shader
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Summary
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5. Creating 3D Graphics
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5. Creating 3D Graphics
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Introduction to 3D graphics with openFrameworks
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Drawing a wireframe sphere
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Creating a camera
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Drawing a solid sphere
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Texturing the sphere
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Mixing 2D and 3D with the GUI
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Deforming a sphere
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Summary
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6. Animating Parameters
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6. Animating Parameters
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Using time values for a parameter's automation
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Using the level of sound for a parameter's automation
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Capturing sound from a sound card's input and measuring its level
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Reading data from a text file
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Controlling automation
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Summary
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7. Distributed and Physical Computing with Networking and Arduino
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7. Distributed and Physical Computing with Networking and Arduino
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Distributed computing with networking
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Networking in openFrameworks
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Implementing the OSC messages receiver
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Creating an OSC sender with openFrameworks
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Creating OSC senders with TouchOSC, Python, and Max/MSP
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Physical computing with Arduino
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Programming an Arduino board
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Summary
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8. Deploying the Project on iOS, Android, and Raspberry Pi
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8. Deploying the Project on iOS, Android, and Raspberry Pi
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Running the project on an iOS device
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Deploying the project on an iOS device
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Running the project on an Android device
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Running the project on Raspberry Pi
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Summary
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9. Further Resources
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9. Further Resources
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Enhancing the video synthesizer project
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Getting more information on openFrameworks
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Debugging and speeding up your code
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Summary
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A. Video Synthesizer Reference
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A. Video Synthesizer Reference
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The desktop version
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iOS and Android versions
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Raspberry Pi version
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Summary
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B. openFrameworks Quick Reference
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B. openFrameworks Quick Reference
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Application
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2D drawing
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The GUI
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Multimedia and other classes
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Mathematical, timer, and conversion functions
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Summary
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Index
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Index

What is openFrameworks?

openFrameworks is a free, open source C++ framework that is intended to develop real-time projects, which use most modern computing devices' capabilities, such as video, audio, networking, and computer vision.

openFrameworks is developed by Zach Lieberman, Theodore Watson, and Arturo Castro, together with a big openFrameworks community. The current openFrameworks version is 0.8.4.

Its main features are:

  • openFrameworks is a framework for the easy development of real-time applications. All you need to do is implement a number of events, such as starting project and drawing, and openFrameworks will maintain all the stuff behind this, such as creating a graphical window and listening for mouse and keyboard events.
  • Its conception and philosophy is oriented for use in creative and experimental projects. openFrameworks contain many ready-to-use functions and classes to work with 2D and 3D graphics, video, audio, and so on.
  • It's a C++ framework, that is, you will code it using the C++ programming language. Your code will be compiled in native machine code and executed very efficiently. Many algorithms that work slowly when implemented in languages such as Python, Java, or Processing, could work significantly faster when implemented in openFrameworks.
  • openFrameworks is highly extensible. Its extensions are called addons. They are open source and are built by members of the openFrameworks community. Several hundreds of existing addons give you an opportunity to extend your project with the capabilities of various software libraries, popular sensors, and gadgets.
  • openFrameworks is cross-platform—the code you will write can be executed on many popular platforms, including OS X, Windows, Linux, iOS, Android, and Linux ARM devices such as Raspberry Pi.
  • Finally, it has a very friendly and active community. If you get stuck during developing with openFrameworks, you can get help from the openFrameworks forum.

Begin your acquaintance with openFrameworks by visiting and exploring its site openframeworks.cc. It contains a lot of useful information about openFrameworks, including download links, tutorials, documentation, forums, and news.

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