Book Image

Multimedia Programming with Pure Data

By : Bryan, Wai-ching CHUNG
Book Image

Multimedia Programming with Pure Data

By: Bryan, Wai-ching CHUNG

Overview of this book

Preparing interactive displays, creating computer games, and conducting audio-visual performance are now achievable without typing lines of code. With Pure Data, a graphical programming environment, creating interactive multimedia applications is just visually connecting graphical icons together. It is straightforward, intuitive, and effective. "Multimedia Programming with Pure Data" will show you how to create interactive multimedia applications. You will learn how to author various digital media, such as images, animations, audio, and videos together to form a coherent title. From simple to sophisticated interaction techniques, you will learn to apply these techniques in your practical multimedia projects. You start from making 2D and 3D computer graphics and proceed to animation, multimedia presentation, interface design, and more sophisticated computer vision applications with interactivity. With Pure Data and GEM, you will learn to produce animations with 2D digital imagery, 3D modelling, and particle systems. You can also design graphical interfaces, and use live video for motion tracking applications. Furthermore, you will learn Audio signal processing, which forms the key aspect to multimedia content creation. Last but not least, Network programming using Pure Data extension libraries explores applications to other portable devices.
Table of Contents (17 chapters)
Multimedia Programming with Pure Data
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Creating a basic particle system


In the Pure Data GEM library, the objects related with particle system come with a prefix part_, a short form for particle. The part_head object initializes a particle system. The part_source object creates a source of particles. The part_velocity object specifies the initial velocity and direction for each new particle. The part_killold object removes particles that exceed a predefined age. The part_draw object renders each particle in the GEM window as shown in the following screenshot:

The only parameters are for the part_velocity object. This object defines the initial velocity for each particle in the system. In the example, Particle001.pd, it defines the velocity as a point with the parameters 0, 0.2, 0. It indicates that velocity has only Y direction value. For X and Z the values are zero. All particles in this case will move upward (positive value for Y direction). The three numbers correspond to the X, Y, and Z components of the initial velocity....