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

Graphical user interface

When you play with our particle system, soon you find that adjusting parameters by changing their values right in the code is very uncomfortable. The solution for this is adding the Graphical User Interface (GUI) to the project that shows sliders for changing the parameters using the mouse, as shown in the screenshot:

We have implemented a similar GUI in the example project 03-Particles/04-Particles. There are two new classes: Slider for a single slider and Interface for managing all the sliders.

While running the project, you can adjust all the control parameters using the mouse. Also, you can load and save parameters' settings (presets) using keys 1, 2, ... 9, and Shift + 1, Shift + 2, … Shift + 9. See the example's code for more details.

Finally, you can add to the project the capability to receive OSC network messages and control it from tablets such as iPad and VJ programs such as VDMX and Max/MSP. For details, see the Using OSC protocol section in Chapter 11,...