Chapter 4. Interactivity
In this chapter, we start to learn about the creation of interactive computer graphics, that is the use of interactivity in Pure Data. In previous chapters, we have experimented with the use of built-in graphical interface objects, such as slider, button, and so on. Imagine the scenario where we are working with a performance or an installation where we need to go back to the patch window and work with those interface elements. We would not want the audience to see the patch window. In this case, we have to enable the use of the mouse and keyboard within the GEM window. In this chapter, we will learn:
To obtain the mouse position within the GEM window and respond to the keyboard interaction.
With these skills, we will learn to create graphical buttons or hotspots.
Combined with the image processing techniques in the previous chapter, we can make a simple video-jockey instrument with the computer keyboard. Finally, we can create an interactive animation, similar to a...
