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.

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Multimedia Programming with Pure Data
Bryan, Wai-ching CHUNG
Jul, 2013 | 350 pages
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Table of Contents (17 chapters)
Multimedia Programming with Pure Data
Multimedia Programming with Pure Data
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Getting Started with Pure Data
Getting Started with Pure Data
Creating the first program
Understanding the terms and interface
Displaying messages
Performing arithmetic calculation
Creating a counter
Automating the counter
Making an animation with the interface elements
Using the graphical interface objects
Summary
2
Computer Graphics with the GEM Library
Computer Graphics with the GEM Library
Using the GEM display window
Drawing basic 2D graphics
Understanding the coordinates system
Drawing basic 3D primitive shapes
Working with digital color
Applying geometric transformation
Creating animation in 3D space
Summary
3
Image Processing
Image Processing
Obtaining images from external sources
Applying image filters
Layering multiple images
Working with time
Performing background removal
Working with chroma key
Experimenting with advanced effects
Summary
4
Interactivity
Interactivity
Obtaining the mouse position
Responding to keyboard events
Creating a graphical button
Preparing a video-jockey instrument
Creating interactive animation
Summary
5
Motion Detection
Motion Detection
Obtaining the frame difference
Detecting presence
Detecting motion
Creating a motion detection animation
Comparing colors
Performing color detection
Making an air drum
Summary
6
Animation with Particle System
Animation with Particle System
Understanding a particle system
Creating a basic particle system
Applying forces to the particles system
Interacting with the mouse
Rendering particles with images
Combining particle system with motion-tracking
Summary
7
Audio Programming
Audio Programming
Preparing for audio processing
Using existing sound files
Generating audio with waves
Working with MIDI
Obtaining audio input for interaction
Summary
8
Interface with the Outside World
Interface with the Outside World
Communicating through the Internet
Controlling the visual display of another computer
Using Open Sound Control with mobile devices
Interfacing with custom hardware through Arduino
Summary
9
Extending Pure Data
Extending Pure Data
Integrating with OpenCV
Working with the Kinect camera
Summary
Communities and References
Communities and References
Pure Data communities
Pure Data events
Pure Data artists and organizations
References
Index
Index

Creating interactive animation

In the last section of this chapter, we are going to create an interactive animation. It is a simplified version of the classic Pong Game.

Before we get on with the Pure Data patch, we first draft a brief plan about the steps we have to do.

  • Animate the moving ball

  • Bounce the ball on the four margins

  • Create the paddle control

  • Keep and display the score

Animate the moving ball

We start with a ball that bounces around in the GEM window. Remember that we use the metro object to animate graphics in the Chapter 2, Computer Graphics with the GEM Library. To make a ball move, we change its position within the GEM window by using the translateXYZ object. Here is the first version of the patch Pong001.pd.

Changing the two number boxes for the translateXYZ object will move the ball around. In order to create an animation, we need to use the metro object to automate the changing of the numbers. In Chapter 2, Computer Graphics with the GEM Library, we have used a counter object...

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