A procedural vegetation generator algorithm using L-system. This algorithm was implemented in JavaScript using P5.js library. This idea was inspired by the book "Procedural Content Generation in Games", chapter 5 "Grammars and L-systems with application to vegetation and levels"

Open the index.html file in a local server

If you want to modify any data, plase use the config.js file.

• CNV_HEIGHT and CNV_WIDTH are the canva dimensions for P5.js
• PACE counts how many pixels there are in each edge of the picture (how many pixels it will "jump" from node to node)
• L_SYSTEM_LEFT and L_SYSTEM_RIGHT are the rules the algorithm will used. Please, read more information about that right bellow
• SEED is the initial value to be transformed by the rules
• INITIAL_X and INITIAL_Y are the coordinates of the first point of the curve
• EXPANSIONS is the number of iterations the algorithm will execute in order to generate the image

First, you should know I've adopted the same alphabet from the book:

• f -> move forward
• + -> turn 30 degrees left
• - -> turn 30 degrees right
• [ -> adds the current position to the saved positions stack
• ] -> pops the last saved position from the stack

Consider A,B,C,D as statements and the following L-system:

1. A -> B
2. C -> D

You should rewrite the variables as:
L_SYSTEM_LEFT = [A, C]
L_SYSTEM_RIGHT = [B, D]
Consider writing the rules sorted by hierarchy if necessary.
You can find out more L-system for generating different types of vegetation on files/l_systems.js