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

Drawing basics

The screens of modern computers consist of a number of small squares, called pixels (picture elements). Each pixel can light in one color. You create pictures on the screen by changing the colors of the pixels.


Graphics based on pixels is called raster graphics. Another kind of graphics is vector graphics, which is based on primitives such as lines and circles. Today, most computer screens are arrays of pixels and represent raster graphics. But images based on vector graphics (vector images) are still used in computer graphics (for details, see the Images basics section in Chapter 4, Images and Textures). Vector images are drawn on raster screens using the rasterization procedure.

The openFrameworks project can draw on the whole screen (when it is in fullscreen mode) or only in a window (when fullscreen mode is disabled). See how to set screen modes in the main.cpp and setup() sections in Chapter 1, openFrameworks Basics. For simplicity, we will call the area where openFrameworks...