~~NOTOC~~
===== Generate some spirals =====

Write some code to generate simple spirals.

{{ :tutorials:spirals.png?direct&450 |}}

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 ====

To solve this task, we need a symbol (here **A**) that is replaced by some rotation (not around RH!) and a cylinder or F node. Shrinking can be achieved by adding a parameter to the **A**, that caries a decreasing number that is used as length for the cylinder/F node.

<code java>
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);
]
</code>