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OpenFrameworks Essentials

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OpenFrameworks Essentials

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OpenFrameworks Essentials
Apr, 2015 | 206 pages
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Table of Contents (19 chapters)
openFrameworks Essentials
openFrameworks Essentials
Credits
Credits
Foreword
Foreword
About the Authors
About the Authors
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Getting Started with openFrameworks
Getting Started with openFrameworks
What is openFrameworks?
Installing openFrameworks
Running your first example
The video synthesizer application
Summary
2
Creating Your First openFrameworks Project
Creating Your First openFrameworks Project
Creating and running a new project
Discovering the project's code structure
Setting up the screen
Centering the coordinate system
A simple drawing
Geometric patterns
Summary
3
Adding a GUI and Handling Keyboard Events
Adding a GUI and Handling Keyboard Events
Creating a GUI using the ofxGui addon
Implementing a simple GUI panel with sliders
Implementing the autosave feature
Creating groups of controls
Implementing a checkbox, a color selector, and a 2D slider
Handling keyboard events
Implementing the matrix pattern generator
Summary
4
Working with Raster Graphics – Images, Videos, and Shaders
Working with Raster Graphics – Images, Videos, and Shaders
Raster images in openFrameworks
Drawing an image file
Playing a video file
Grabbing a live video from a camera
Mixing layers using additive blending
Creating the video effect with a shader
Summary
5
Creating 3D Graphics
Creating 3D Graphics
Introduction to 3D graphics with openFrameworks
Drawing a wireframe sphere
Creating a camera
Drawing a solid sphere
Texturing the sphere
Mixing 2D and 3D with the GUI
Deforming a sphere
Summary
6
Animating Parameters
Animating Parameters
Using time values for a parameter's automation
Using the level of sound for a parameter's automation
Capturing sound from a sound card's input and measuring its level
Reading data from a text file
Controlling automation
Summary
7
Distributed and Physical Computing with Networking and Arduino
Distributed and Physical Computing with Networking and Arduino
Distributed computing with networking
Networking in openFrameworks
Implementing the OSC messages receiver
Creating an OSC sender with openFrameworks
Creating OSC senders with TouchOSC, Python, and Max/MSP
Physical computing with Arduino
Programming an Arduino board
Summary
8
Deploying the Project on iOS, Android, and Raspberry Pi
Deploying the Project on iOS, Android, and Raspberry Pi
Running the project on an iOS device
Deploying the project on an iOS device
Running the project on an Android device
Running the project on Raspberry Pi
Summary
9
Further Resources
Further Resources
Enhancing the video synthesizer project
Getting more information on openFrameworks
Debugging and speeding up your code
Summary
Video Synthesizer Reference
Video Synthesizer Reference
The desktop version
iOS and Android versions
Raspberry Pi version
Summary
openFrameworks Quick Reference
openFrameworks Quick Reference
Application
2D drawing
The GUI
Multimedia and other classes
Mathematical, timer, and conversion functions
Summary
Index
Index

iOS and Android versions

The video synthesizers for iOS and Android are light versions of the desktop project. They are considered in Chapter 8, Deploying the Project on iOS, Android, and Raspberry Pi, and include only the matrix pattern generator and the GUI panel. Instead of using the control keys, it uses the double-tap to toggle the GUI. Additionally, these projects use an accelerometer to control two sliders.

The openFrameworks project and source files

The project's code structure is the following:

  • The project uses the ofxGui addon. It is linked to the project using the Pattern Generator wizard for the iOS version. For the Android version, the project is started by copying the example, which has already linked the ofxGui addon.

  • The project's source files are ofApp.h and ofApp.mm for iOS and ofApp.h and ofApp.cpp for Android. They are placed in the src folder of the project.

Data files

The project writes and reads its GUI state to the settings.xml file.

The GUI

A GUI panel includes basic sliders and Global and Primitive groups described in the previous The GUI controls section under the The desktop version section.

Touches

A double-tap toggles the GUI visibility.

Accelerometer

The accelerometer values control the twistX and twistY sliders.

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