I was reading The Nature of Code ( the book written by Mr. Daniel Shifman). There I found the chapter which contains physics libraries. I wanted to add Box2D (the processing version of Box2D) to my processing.
I downloaded the library for pbox2d from this link - https://github.com/shiffman/Box2D-for-Processing . And then I added it to processing.
But when I implemented some code from nature of code it did not work. For example processing was saying that there is nothing as PBox2D.
Please help me. Thanks in advance