3

Interaction

Always remember that this whole thing was started with a dream and a mouse.

—Walt Disney

The quality of the imagination is to flow and not to freeze.

—Ralph Waldo Emerson

In this chapter:

 The flow of a computer program

 The meaning behind setup() and draw()

 Mouse interaction

 Your first dynamic Processing sketch

 Handling events, such as mouse clicks and key presses

3-1 Go with the flow

If you have ever played a computer game, interacted with a digital art installation, or watched a screensaver at three in the morning, you have probably given very little thought to the fact that the software that runs these experiences happens over a period of time. The game starts, you find the secret treasure hidden in magical rainbow land, defeat the ...

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