Fibonacci Curve

**ernie-f** · 12 February 2019, 11:28 AM

My first thought:

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**Rik** · 12 February 2019, 04:46 PM

Originally Posted by ernie-f

My first thought:

Nice try, ernie.

But, that's not a Fibonacci Curve.
That's just a curve that's getting bigger exponentially.
I tried that.
And if you have a go, then try and put your exponential curve over the top of a Fibonacci Curve, then you'll see that they are not the same.

**gwpriester** · 12 February 2019, 05:47 PM

In all the time we have been going round and round you could have created the world's most exquisite Finonacci curve Rik.

**Acorn** · 12 February 2019, 06:41 PM

I lifted this SVG from: http://www.bytemuse.com/post/fibonacci-spiral/.

Fibonacci Curve from Ruby code to SVG Output.xar

I saved the <svg> HTML as a SVG file and dropped into Xara.
This give the black blob, which I set to be no fill, solid 2pt line and scaled.

The one here is 13 separate curves all grouped: http://www.downloadclipart.net/downl...cci-spiral-svg.

Acorn

**Rik** · 12 February 2019, 07:07 PM

Originally Posted by gwpriester

In all the time we have been going round and round you could have created the world's most exquisite Finonacci curve Rik.

And miss out on all the dialogue and the suggestions from members and see if there is another way, rather than mine, to draw it?!

**gwpriester** · 12 February 2019, 07:07 PM

I think the Fibonacci spiral on its own is not that great looking. The curve looks better when constructed without the grid of the golden section rectangle. Just my personal opinion of course.

The curve posted by Ernie is much more pleasing to the eye. Just my opinion of course.

**Egg Bramhill** · 12 February 2019, 07:45 PM

Problem with trying to use Xara's smooth bezier curves is they're not very good. Try creating a circle from four lines, converted to smooth curves. Definetly not a circle.

Inkscape has a better tool using it's spiro beziers.

**Rik** · 12 February 2019, 08:45 PM

Originally Posted by Egg Bramhill

Problem with trying to use Xara's smooth bezier curves is they're not very good. Try creating a circle from four lines, converted to smooth curves. Definetly not a circle.

Inkscape has a better tool using it's spiro beziers.

Maybe Xara could have developed such tools also?!

**ernie-f** · 13 February 2019, 09:26 AM

Yes, with the spxe for Xara You couldn't be precise. To make with this tool a perfect fibonacci curve Yuo may be able to put in the parameter of 1.68034 for the curvator and set the begining to 90°.

I made 6 years ago a videotut on vimeo how to in Illustrator https://vimeo.com/46122411. Illustrator has the segmentcurve tool, so it is easy doingt it.
In Xara I cut out a segment from a circle. Here a quick and dirty tutorial for Xara: https://www.franta-net.de/snagit/fibonacci-xara.mp4

**Rik** · 13 February 2019, 09:02 PM

Originally Posted by ernie-f

Yes, with the spxe for Xara You couldn't be precise. To make with this tool a perfect fibonacci curve Yuo may be able to put in the parameter of 1.68034 for the curvator and set the begining to 90°.

I made 6 years ago a videotut on vimeo how to in Illustrator https://vimeo.com/46122411. Illustrator has the segmentcurve tool, so it is easy doingt it.
In Xara I cut out a segment from a circle. Here a quick and dirty tutorial for Xara: https://www.franta-net.de/snagit/fibonacci-xara.mp4

Nice one, ernie.
I like it.

I'll have to give it a go in Illustrator and see how I get on.
I've never really used Illustrator much. But, it seems that there's a 'curve' tool. That seems to make the job a lot easier.