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

Raster and vector images

In computer graphics and computer vision, an image is a two-dimensional picture that is used for a wide range of purposes. There are two classes – raster and vector images.

Raster images are rectangular arrays of picture elements (called pixels) and they are natural for representing photos from digital cameras. Modern computer screens are physical arrays of pixels, hence the screens are natural devices for displaying raster images.

Vector images consist of a number of graphical primitives such as lines, circles, and curves, and they are natural for representing precise drawings such as cartoons and graphs. Vector images can be scaled up without any loss of quality and increase in the size of memory, hence they are used for parametrical drawings.

openFrameworks works with both raster and vector images. In this chapter, we will deal with raster images only. For working with vector images, the examples/addons/svgExample example.

Let's consider the two basic operations...