introductory steps with processing
- download processing on https://processing.org/
- install & start the software
- install several 'Tools' (Menu:Tool->Add Tool...)
- libraries: Box2D for Processing
- examples:
- The Nature of Code
- Processing Handbook
- Learning Processing
- open new Sketchbook
- follow 01-intro.md
- the basic structure: 01-intro.md
- classes and objects: 02-classes.md
- physics with box2d: 03-box2d.md