Following up on a comment in the latest DevMeet; how to draw the Golden Spiral.
I did a quick search for “golden spiral code” and found this:
It illustrates how one use the Fibonacci sequence to generate the coordinates for drawing the arc segments for the spiral. I don’t have time to translate this to Ruby right now, but I’ll see if I have a spare minute tomorrow. (Unless someone else takes up the challenge? 
)
This is the draw routine from a Sketchup tool someone requested years ago.
Golden Spiral.rb (2.3 KB)
Produces this image
Using U-V PolyGen and the parametric equations:
x = u * Math.cos(10.0 * u) * Math::E**u
y = u * Math.sin(10.0 * u) * Math::E**u
where 0 <= u <= PI
https://sketchucation.com/plugin/862-dm_curve_maker_plugin
Has a golden-spiral option…
It’s a bit old, but it’s RBZ contains RBS and RBE formats… so if you have the means the RB version is accessible…
But there’s probably some similar RB versions around too…
Related: Very occasionally I’ve had SketchUp infer a golden section. How do you make it do that?
@Elmtec-Adam, sliding the cursor into guessed position with the ‘Rectangle’ tool.
Just like giving you a “square” indication when into position.
I actually realised I should have googled it before I posted that. Thankyou