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

Creating a new project

For developing your projects you have two possibilities: start it from an existing example or create it using the Project Generator wizard. Let's discuss both in detail.

Creating a project from an existing example

The easiest way to start your own project is to just copy some existing examples (or your own project) into the apps/myApps folder, or any other subfolder of the apps folder. Then rename the folder as you want (for example, to myInteractiveWall), and open the project using your developing environment. Now you can change the code, and run the project.

This way, almost all the examples in the book are made from the emptyExample project, located in the examples/empty folder.

Such an approach is indeed very easy. Also, it is especially useful for working with some complicated addons such as ofxOpenNI (see Chapter 10, Using Depth Cameras, for more information on this addon). Namely, you can have difficulties with linking such addons by yourself or with projectGenerator. In this case, just start your project from the existing working addon's example.

Creating a project using Project Generator

You can create a new project using the Project Generator wizard, located in the projectGenerator folder. It lets you specify the project's name, its folder, and the list of addons needed in the project.

Such a way is simple too, and it is especially useful when you start a new project, which needs to use many addons. Manual linking of addons can take much time, and Project Generator does it automatically for you. For further details see the Using Project Generator section in Appendix A, Working with Addons.

In our opinion, using Project Generator just for creating projects with proper names is not so important, because you can rename the project by yourself using the development environment. So, we use this wizard just for linking addons to new projects.

Now we are ready to create our first project with openFrameworks.