Book Image

Mastering openFrameworks: Creative Coding Demystified

By : Denis Perevalov
Book Image

Mastering openFrameworks: Creative Coding Demystified

By: Denis Perevalov

Overview of this book

openFrameworks is a powerful programming toolkit and library designed to assist the creative process through simplicity and intuitiveness. It's a very handy software library written in C++ to reduce the software development process, helping you to kick-start creative coding. With the help of C++ and shaders support, openFrameworks allows for the processing of all kinds of media information with your custom-developed algorithms at the lowest possible level, with the fastest speed. "Mastering openFrameworks: Creative Coding Demystified" will introduce you to a world of creative coding projects, including interactive installations, audio-visual, and sound art projects. You will learn how to make your own projects using openFrameworks. This book focuses on low-level data processing, which allows you to create really unique and cutting-edge installations and projects. "Mastering openFrameworks: Creative Coding Demystified" provides a complete introduction to openFrameworks, including installation, core capabilities, and addons. Advanced topics like shaders, computer vision, and depth cameras are also covered. We start off by discussing the basic topics such as image and video loading, rendering and processing, playing sound samples, and synthesizing new sounds. We then move on to cover 3D graphics, computer vision, and depth cameras. You will also learn a number of advanced topics such as video mapping, interactive floors and walls, video morphing, networking, and using geometry shaders. You will learn everything you need to know in order to create your own projects; create projects of all levels, ranging from simple creative-code experiments, to big interactive systems consisting of a number of computers, depth cameras, and projectors.
Table of Contents (22 chapters)
Mastering openFrameworks: Creative Coding Demystified
About the Author
About the Reviewers

Playing sound samples

The openFrameworks' ofSoundPlayer class is designed for playing and controlling sound samples. The basic usage of the ofSoundPlayer sound object is the following:

  • Loading a sound sample, specifying its filename using:

    sound.loadSound( fileName );
  • Playing the sample using:;
  • Updating the sound engine using the global function:


    You need to call the ofSoundUpdate(); function in testApp::update() for all the samples to play correctly.

There are a number of functions for controlling sample playback. They are as follows:

  • The stop() function stops sample playing.

  • The getIsPlaying() function returns true if our sample is currently playing.

  • The setPaused( pause ) function enables or disables pause in sample playing, with pause of type bool.

  • The setPosition( pos ) function sets sample playing position, where pos is a float value from 0.0 to 1.0. Here 0.0 means the start of the sample and 1.0 means the end of the sample.

  • The getPosition() function returns the current...