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

Using image sequence

In the previous sections, we have considered how to work with videos stored in video files or captured by cameras. Here we will consider working with the third source of video – image sequences.

Sometimes using ofVideoPlayer for drawing movies is not appropriate. Two main cases are:

  • You need to render a big amount of movies on one screen simultaneously. For example, in a 2D computer arcade game, there can be about 100 moving characters and objects. You can play about 10 different video files in openFrameworks simultaneously, but 100 is too much for it; so some other solution is needed.

  • You need to draw many layers of videos using alpha channel. But at the time of writing this, openFrameworks does not support videos with alpha channel within its standard class ofVideoPlayer. There is support in openFrameworks for only Mac OS X, with class ofQTKitPlayer and example examples/video/osxHighPerformanceVideoPlayerExample. Also, there is an addon ofxAlphaVideoPlayer, but it is...