Purpose: Add a regeneration method to add new trees each year, randomly located on the terrain.

Statement of the exercise:

1. Each year during the simulation, create new trees with dbh = 3cm and height = 1.3m
2. Each year, at max n trees (with n in a variable called regenerationMax) may appear (default value is 10)
3. All tree identifiers (id) must be unique in the scene

Option:

• The user can choose the value of regenerationMax at simulation initialisation time

Helper and solution