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

Drawing line segments and points

Instead of mesh.draw(), you can use the following functions:

  • The mesh.drawWireframe() function draws only surface edges without the interiors of the triangles. Such a mode of drawing is called wireframe drawing; it is very useful for debugging, and of course, can be used as an effect.

  • The mesh.drawVertices() function draws only vertices of the mesh. It is useful for debugging and also as an effect.

Also, to represent not only triangular surfaces but also objects consisting of line segments or points, use the mesh.setMode( mode ) function, where mode has type ofPrimitiveMode enumeration. To see all the possible values for mode, check its definition. We will mention only three values:

  • OF_PRIMITIVE_TRIANGLES is a default value, which draws a mesh as triangles. We had considered how to use this mode in the pyramid examples mentioned earlier.

  • OF_PRIMITIVE_LINES draws a mesh as a number of line segments.

  • OF_PRIMITIVE_POINTS draws a mesh as a number of points.