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
Credits
Foreword
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
Index

3D basics


Working with 3D means working with objects modeled in the three-dimensional scene, where the dimensions are horizontal (x), vertical (y), and depth (z). The resulting 3D scene is projected either onto a 2D image to show it on the screen, two 2D images for stereoscreen, or even printed as a 3D object using a 3D printer.

Representation of 3D objects

Each 3D object is represented using a number of elementary primitives such as points, line segments, triangles, or other polygons. Methods of the object's representation are as follows:

  • An object is a number of surfaces assembled from polygonal primitives such as triangles and quadrangles (often called quads). This method is used in 3D-modeling software for representing "surface" objects, such as a human body, a car, a building, and also clothes and a rippled water surface.

  • An object is a number of curves assembled from line segments. Such a representation is used for modeling hair and fur.

  • An object is a huge number of small points called...