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OpenFrameworks Essentials

OpenFrameworks Essentials

By : Denis Perevalov
5 (7)
Buy this Book
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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
3
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
4
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
5
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
6
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
7
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
8
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
10
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
12
Index
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Index

Setting up the screen

The very first thing to code is to set up the global attributes: the project's window title, screen size, rendering frame rate, and background color. To achieve this, add the following lines to the ofApp::setup() function's body in the ofApp.cpp file:

ofSetWindowTitle( "Video synth" );
ofSetWindowShape( 1280, 720 );
ofSetFrameRate( 60 );
ofBackground( ofColor::white );

Tip

Downloading the example code

You can download the example code files from your account at http://www.packtpub.com for all the Packt Publishing books you have purchased. If you purchased this book elsewhere, you can visit http://www.packtpub.com/support and register to have the files e-mailed directly to you.

This code consists of calling four openFrameworks functions, which set the window title to Video synth, the project's drawing area size with width of 1280 pixels and height of 720 pixels, the frame rate to 60 Hz, and the white background, respectively.

Note

All openFrameworks...

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Tech Concepts
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Programming languages
73
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OpenFrameworks Essentials
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