Book Image

Processing 2: Creative Programming Cookbook

Book Image

Processing 2: Creative Programming Cookbook

Overview of this book

Processing is probably the best known creative coding environment that helps you bridge the gap between programming and art. It enables designers, artists, architects, students and many others to explore graphics programming and computational art in an easy way, thus helping you boost your creativity. "Processing 2: Creative Programming Cookbook" will guide you to explore and experience the open source Processing language and environment, helping you discover advanced features and exciting possibilities with this programming environment like never before. You'll learn the basics of 2D and 3D graphics programming, and then quickly move up to advanced topics such as audio and video visualization, computer vision, and much more with this comprehensive guide. Since its birth in 2001, Processing has grown a lot. What started out as a project by Ben Fry and Casey Reas has now become a widely used graphics programming language. Processing 2 has a lot of new and exciting features. This cookbook will guide you to explore the completely new and cool graphics engine and video library. Using the recipes in this cookbook, you will be able to build interactive art for desktop computers, Internet, and even Android devices! You don't even have to use a keyboard or mouse to interact with the art you make. The book's next-gen technologies will teach you how to design interactions with a webcam or a microphone! Isn't that amazing? "Processing 2: Creative Programming Cookbook" will guide you to explore the Processing language and environment using practical and useful recipes.
Table of Contents (18 chapters)
Processing 2: Creative Programming Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Working with ArrayLists


In the Working with arrays recipe, you've learned how to deal with arrays, but working with an array has its limitations. You can't easily add or remove objects. The ArrayList data structure works in a way similar to a regular array of objects, but here you can add or remove objects in a very easy way.

How to do it...

You can start by saving your sketch as working_with_arraylists.pde. The next thing you need to do is to add a new tab to your sketch and save it as MyObject. You can do this by clicking the arrow icon on top of the PDE or by using the shortcut Shift + Cmd + N on the Mac, or Shift + Ctrl + N on Windows or Linux.

In this tab, we'll write a simple class with two methods. We'll use this class to create objects to fill our ArrayList.

class MyObject
{
  float x;
  float y;
    
  MyObject()
  {
    x = random( width );
    y = random( height );
  }
    
  void update()
  {
    y--;
  }
    
  void render()
  {
    ellipse( x, y, 60, 60 );
  }
}

Once you've written...