I tried put together some scrap code for drawing a Golden Ratio curve but when using Interpolate Curve component to draw the final curve the CurvatureGraph doesn’t look nice (well, I could see without the graph that the curvature wasn’t very smooth at all).
Is the bumpy curvature below to be expected or have I done something terribly wrong? The curve is Degree 3.
Golden Ratio.gh (11.9 KB)
// Rolf
To me it is very nice!
I think everything is working fine and the problem has been giving the CurvatureGraph a curve with such a large range of curvature values. The CurvatureGraph needs a domain (the min and max curvature, I guess) to remap it in the domain of the model. As you are iterating towards the spiral focus in each new spiral segment, the curvature gets bigger and bigger.
Hi Rolf,
I would say yes, because the golden rectangle/square subtraction method apparently only generates an approximation to the true golden curve. Golden spiral - Wikipedia
Regards
Jeremy
Golden spiral interpolated from high point count polar equation (blue) overlaid on your golden rectangle version (red):
Curvature graph for interpolated polar equation curve:
Golden Ratio 2.gh (22.7 KB)
You guys are cool I must say. 
This last version by @jeremy5 seems to be what I’m looking for. I will look into the Arc-version too ( I didn’t think that was possible with gradiuent changing radius but what looks good to the eye is what I’m after).
@Dani_Abalde, thanks for thinking it wasn’t too bad after all. At least that the curvature was expected… 
Have a good one.
// Rolf
Many thanks!
