Simulations in Swift 5: Design and Implement with Swift Playgrounds

© Beau Nouvelle 2019

B. NouvelleSimulations in Swift 5https://doi.org/10.1007/978-1-4842-5337-3_9

9. The Forest: Part Two

Beau Nouvelle¹ 

(1)

Victoria, Australia

 

We now have the initial conditions of our forest completed, and so it’s time to start applying some rules around life and death—you didn’t think this was going to be a happy forest, did you?

We’ll begin with the life cycle of each tree.

Life of a Tree

A simplified description of a tree’s life cycle might be that they grow from a seed, then, once they’ve become mature, drop seeds of their own, spreading life around them. Our trees should behave in a similar way.

We’ll make it so that they can be in one of three different stages: seedling, mature, and elder. Seedlings will be ignored by woodcutters, ...