Xara does allow you to insert a spiral, but, I couldn't see if the Fibonacci Curve is an option.
So, feel free to show me how to draw the Fibonacci Curve in Xara.
If you can, then some instructions on how you did it, would be good.
Printable View
Xara does allow you to insert a spiral, but, I couldn't see if the Fibonacci Curve is an option.
So, feel free to show me how to draw the Fibonacci Curve in Xara.
If you can, then some instructions on how you did it, would be good.
I know what it looks like, Gary.
And I know what the proportions are.
I'm asking how to draw this in Xara?
Each section is a 1/4 circle.
Yup!Quote:
Originally Posted by gwpriester
I know that too.
In fact, that's what I started doing. But, then it means trying to join all the 1/4 circles.
So, that's why I asked how you/someone would draw this in Xara.
Is there a way of drawing just one line which then follows the curve of the Fibonacci Curve?
This is what I did.
But...
Is this the only way to draw it?
Rik,
Draw a line with the Shape tool clicking on respective square points and then go back and pull out the handles to cleanup the arcs. You can check/align each arc by drawing a circle separately. Delete the circles and you're left with a continuous line. HTH
Is it not easier, as gwp has said and what I did, is to draw a circle and cut the 1/4 out of it.Quote:
Originally Posted by Fred C
That way, in my opinion, the arc is accurate.
In fact, to get the correct size of circle, all you need is to draw a square 100px x 100px, Then draw a circle of twice the size. i.e. 200px
Then align the quarter of the circle over the square.
However...
The continuous line that you mention, Fred, is a collection of points, which is the same as the arcs joined together.
Isn't it?
Piece of cake.
Rik, Remember this:
Attachment 123350
http://site.xaraxone.com/html/shareware.html
I wonder if this is the basis for Xara's smart shape spiral?
I was wondering if anyone would remember this tool and you did Fred. Not sure if it will do the job Rik is trying to achieve though. :rolleyes:Quote:
Originally Posted by Fred C
Stygg
Pixabay has a svg version. It’s one thing drawing (or downloading) the curve guide, but another doing anything useful with it. Maybe drawing snails? ;)
Thanks for your comments and suggestions guys.
I know that Xara has the option of being able to draw a SPIRAL.
But, that's not the same as the Fibonacci Curve.
And many thanks for the link (reminder) to the SPX Spiral Generator.
I did used to have that, but, I've downloaded it again.
But, whilst it looks as though it produces something that looks like a Fibonacci Curve, it actually isn't.
Rik, here is my best shot.
Following the Fibonacci sequence (1, 1, 2, 3, 5 ,8, 13 21, 34, ...), I created a vertical line of unit length (here 50px).
I copied that and turned it 90° (horizontal) and created new lines the length matching the Fibonacci Sequence (above).
After running out of paper (A2), I switched to the Shape Tool and with Smooth Join, I touched each of the corners, moving along the line from in to out.
The trick is to choose a source point, just off the start point and to finish beyond the end point with a nearby sink point; these allow the sequence to be effectively truncated.
Attachment 123355.
No guarantees it is right as the curves are Bezier but possibly more accurate than quarter circles.
Acorn
I can't say that I could follow all your instructions, but, the good thing was that you included your .xar file.Quote:
Originally Posted by Acorn
And when I place my curve made with semi-circles over yours, then there's a marked difference.
And if I download a Fibonacci Curve from the Internet and place my curve over the top, then it's pretty perfect.
And, I'm sorry to say that yours doesn't quite fit. :(
However, I am extremely grateful to you for trying to show me, and posting your file so that I could have a look at it. :-bd
Rik, I must have got a bit dizzy.
Acorn
I created a continuous straight line tracing over Acorn's line segments, converted the control points to Curve, then clicked Make Curve (but first as suggested, added a tiny extra length at the start and one at the end) then it does indeed create a curve to match your results. And the beauty of vectors is once you have your right angles constructed, you can reduce the line to a more convenient size.
Since my vector line fibonacci spiral stereogram was so well received I decided to do another, this one using a blend of two curves.
Told you I got dizzy!Quote:
Originally Posted by gwpriester
Acorn :p
My first thought:
Attachment 123364
Nice try, ernie.Quote:
Originally Posted by ernie-f
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.
In all the time we have been going round and round you could have created the world's most exquisite Finonacci curve Rik. :rolleyes:
I lifted this SVG from: http://www.bytemuse.com/post/fibonacci-spiral/.
Attachment 123367
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
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?! ;)Quote:
Originally Posted by gwpriester
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.
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?!Quote:
Originally Posted by Egg Bramhill
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.Quote:
Originally Posted by ernie-f
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.
Thank You Rick.Quote:
Originally Posted by Rik
I know it's not all so easy like it looks.
Wish all Xaraistas a great „Valentines Day!”
From Bavaria
Ernie
If you look, you'll find that it exists everywhere in nature!
Yaeh Rick,Quote:
Originally Posted by Rik
You'r so right.
Everywhere we can see the golden ratio by fibonacci.
The great masters of art in the mediavel created their arts on this rule. We also as Xara-artists may think about this and bring it in our art.
Attachment 123381
Hi, Ernie.
I'm not sure if anyone else is interested, but, it would be great for me if you did a video tutorial in Illustrator.
That shows how to 'snap to objects' and other useful features that would come in handy.
Whatever options you have selected in this tutorial https://vimeo.com/46122411 clearly are not the options I have selected in my Illustrator.
I hope all that made sense, and you could post it in the 'Graphics Gallery' in the Non-Xara Galleries forum.
Hi, Rick,
I would like to record the tuturial again if I would call Adobe products my own.
I have cancelled Adobe and do not want to install a demo version. I sold the CS3-6 versions.
For the tutorial on vimeo I used the smart guides and the arc tool, I can still remember that.
Aha!Quote:
Originally Posted by ernie-f
Yes. Smart Guides is the answer.
Thanks, Ernie.
You're welcome.
Rik, I'm fascinated with your quest to learn about such things as Fibonacci spirals - are you doing a design course?
Other than what I've read here on the TG forum, I don't know much about it (Fibonacci spirals etc), but now plan to learn more! I found this link which I thought might be useful for further investigation into the subject:
https://www.goldennumber.net/site-map/
Hi Jono.Quote:
Originally Posted by Jonopen
No. I'm no doing a design course. Never been on one and if I do need help, well... there are a lot of experts on TG who will willingly help anyone with anything.
I posted this thread here, because, the only way I could think of making it, was to use quarter circles. Which was also what Gary Priester suggested.
I was wondering what other ways were there to draw this curve.
So, that's why the Fibonacci Curve.
I was watching a art video on YouTube don't remember which one and saw one of these curves, i it noticed because on your posts about this particular curve.