~~NOTOC~~
===== From 3D binary tree to 2D binary tree =====

Change the default 3d binary tree to a 2d version, growing planar in one plane.

{{ :tutorials:tree_3d.png?direct&250 |}}{{ :tutorials:tree_2d.png?direct&250 |}}


==== Solution ====

To remove the 3rd dimension, we just need to remove the **RU(90)** commands from the original code.

<code java>
public void run1() [
  A(x) ==> F(x)
    [RU( 30) A(x*0.8)]  // first branch
    [RU(-30) A(x*0.8)]; // second branch
]
</code>