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

Geometric primitives

In this chapter we will deal with 2D graphics. 2D graphics can be created in the following ways:

  • Drawing geometric primitives such as lines, circles, and other curves and shapes like triangles and rectangles. This is the most natural way of creating graphics by programming. Generative art and creative coding projects are often based on this graphics method. We will consider this in the rest of the chapter.

  • Drawing images lets you add more realism to the graphics, and this is considered in Chapter 4, Images and Textures.

  • Setting the contents of the screen directly, pixel-by-pixel, is the most powerful way of generating graphics. But it is harder to use for simple things like drawing curves. So, such method is normally used together with both of the previous methods. A somewhat fast technique for drawing a screen pixel-by-pixel consists of filling an array with pixels colors, loading it in an image, and drawing the image on the screen (see its description in the Creating...