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

Working with vertices

There are a number of functions for accessing the vertices and their properties:

  • The getNumVertices() function returns the number of vertices.

  • The getVertex( i ) function returns the position of the vertex with index i.

  • The setVertex( i, p ) function sets the position of vertex i to p. Note that this function can change the vertex but it cannot add a new vertex. So if i is greater or equal to mesh.getNumVertices(), you need to add a vertex (or vertices) using the mesh.addVertex( p ) function as described in the Using ofMesh section.

  • The removeVertex( i ) function deletes the vertex with index i. Be very careful when using this function; after deleting a vertex, you should probably also delete the corresponding normal, color, and texture coordinate, and change the indices of the triangles to keep its coherence.

  • The clearVertices() function deletes all the vertices. See corresponding cautions for removeVertex().

  • The clear() function clears the mesh, including its vertices,...