Leaf Venation

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Veronica Echevarria (Author)

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WHAT IS IT?

This is an agent-based model of leaf veins being formed inside a leaf!

HOW IT WORKS

I got an awesome code by Steven Brewer that creates the venation pattern.

A function called "setup" clears everything away and sets up the dot that begins the leaf's veins.

There is just one function called "go". The "step" button calls this function once. The "go" button, calls it forever.

In the function, the turtle moves forward six steps, and creates a branch at a 35 degree angle on both sides (to maintain symmetry). The veins stops branching out in 4 ticks.

The turtle and background was made and designed by me (Veronica!)

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breed [leafs leaf]
breed [stems stem]
stems-own [ gen ]

to setup
  clear-all
  create-stems 1 [
    set shape "dot"
    setxy 0 min-pycor
    pd
    set heading 0
    set gen 1
    set color green
  ]
  reset-ticks
end 

to go
  create-leafs 1 [
    set shape "leaf 2"
    set size 30 
    set color 68
    ]
  ask stems [
    fd (3 * ( 2 / gen ))
    hatch 1 [ rt 35 set gen gen + 1]
    hatch 1 [ lt 35 set gen gen + 1]
    if not (who = 0) [die]
  ]
  tick
  if (ticks > 4) [ask stems [die] stop]
end

There are 3 versions of this model.

Uploaded by	When	Description	Download
Veronica Echevarria	over 10 years ago	Quick Save	Download this version
Veronica Echevarria	over 10 years ago	Updated and Finished	Download this version
Veronica Echevarria	over 10 years ago	Initial upload	Download this version

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