GroIMP wiki - 02_user_tutorials:21_exercices
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https://dokuwiki.grogra.de/lib/exe/fetch.php?media=wiki:dokuwiki.svgtext/html2025-12-10T15:20:11+00:00Anonymous (anonymous@undisclosed.example.com)Implement 'plant like structures'
https://dokuwiki.grogra.de/doku.php?id=02_user_tutorials:21_exercices:01_exercises_plant_like_structures_abop&rev=1765380011&do=diff
Implement 'plant like structures'
Implement the 'plant like structures' as described in the book “The Algorithmic Beauty of Plants” by Prusinkiewicz and Lindenmayer (1990) on page 25 in Figure 1.24.
Help
In order to have a X (model d), e), and f)) that we can use, we first need to define it as module. For this a module without any parameters, extends, or instantiations is doing the job just fine. While we already have atext/html2025-12-10T15:21:29+00:00Anonymous (anonymous@undisclosed.example.com)From 3D binary tree to 2D binary tree
https://dokuwiki.grogra.de/doku.php?id=02_user_tutorials:21_exercices:02_exercises_binary_tree_3d2d&rev=1765380089&do=diff
From 3D binary tree to 2D binary tree
Change the default 3d binary tree to a 2d version, growing planar in one plane.
Solution
RU(90)
public void run1() [
A(x) ==> F(x)
[RU( 30) A(x*0.8)] // first branch
[RU(-30) A(x*0.8)]; // second branch
]text/html2025-12-10T15:22:46+00:00Anonymous (anonymous@undisclosed.example.com)From binary to ternary tree
https://dokuwiki.grogra.de/doku.php?id=02_user_tutorials:21_exercices:03_exercises_binary_ternary_tree&rev=1765380166&do=diff
From binary to ternary tree
Change the default 3d binary tree to a ternary version, a tree with tree instead of two branches.
Solution
public void run3() [
A(x) ==> F(x)
[RH( 0) RU(45) RH(90) A(x*0.8)] // first branch
[RH(120) RU(45) RH(90) A(x*0.8)] // second branch
[RH(240) RU(45) RH(90) A(x*0.8)]; // third branch
]text/html2025-12-10T15:24:08+00:00Anonymous (anonymous@undisclosed.example.com)Generate some spirals
https://dokuwiki.grogra.de/doku.php?id=02_user_tutorials:21_exercices:05_exercises_spirals&rev=1765380248&do=diff
Generate some spirals
Write some code to generate simple spirals.
s1: a=50 degree, s=0.88
s2: a=80 degree, s=1.0
s3: a=120 degree, s=0.75
s4: a=145 degree, s=1.05
Play around with different angles and shrinking factors.
Solution
AA
module A(float len);
protected void init() [
Axiom ==> A(1);
]
public void run()[
A(x) ==> F(x,0.05) RL(50) A(x*0.88);
]