If you are not familiar with the Processing language, read this chapter for an introduction to how to create 2D shapes, use geometry transformations and color, and handle touchscreen input in Processing. The chapter ends with a step-by-step example of a drawing sketch, which we will use in Chapter 3 to learn how to export and upload an app created with Processing to the Play Store.
A Programming Sketchbook for Artists and Designers
As we learned in the first chapter, the Processing language ...