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You know... the last grill of the summer is the first grill in autumn   
M.D.V.
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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I need to buy a tool or gauge to draw spiral and ellipse. any info to share?
BTW: I bought a gauge from ebay for fibonacci.
diligent hands rule....
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I use Paintshop Pro, which will draw ellipses really easily. It'll also do spirals via the "Effects ... Distortion effects ... Twirl" menu.
What are you trying to do?
What do you want the ellipse / spirals for?
There may be better ways ...
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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data mining...
diligent hands rule....
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Drawing a pickaxe might work better?
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Here's how to draw an ellipse[^]. The anchors are at the two focii.
As far as a spiral goes, there are various kinds, so you have to more specific. An online search will bring up diagrams and even videos.
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I know how to draw ellipse. but using gauge it is much easier, even quicker than drawing it on screen with computer graphics too 
diligent hands rule....
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The mind boggles: "data mining" ... "spiral" ... whazzup ?
You can derive a "golden mean" spiral from the Fibonacci series easily [^].
«The mind is not a vessel to be filled but a fire to be kindled» Plutarch
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the neat thing I am looking for is from that Fibonacci gauge: if I fix two needles of it, the third needle is decided. so this can be easily used to do Fibonacci retracement in stock trading. that is in my mind....
diligent hands rule....
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Read an interesting take today: fundamentals -> what, technicals -> when & how much.
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your link is great! thank you very much!
diligent hands rule....
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When I was a kid there was a fantastic drawing kit for this. I think it was called 'sprirograph'. Yep, just looked it up.
Spirograph - Wikipedia[^]
"Go forth into the source" - Neal Morse
"Hope is contagious"
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this link is very helpful
diligent hands rule....
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Southmountain wrote: I need to buy a tool or gauge to draw spiral and ellipse. any info to share?
Based on the answers one bit of info might be that you should probably define more carefully what sort of "tool" you are actually looking for.
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this is the part I am not clear myself. but I did research and find something similar to ellipsograph..
diligent hands rule....
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I still have no idea what you are trying to achieve, but, if you want to find some number of equally spaced points on the perimeter of an ellipse, it requires calculus/integration.
In my code, I use one of Ramanujan's approximation functions to get satisfactory results for ring/pendant design.
«The mind is not a vessel to be filled but a fire to be kindled» Plutarch
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Given the mention of the Fibonacci gauge, I'm assuming you mean 'draw' as in pencil an paper. Depends on how exact you want to be. There are a variety of technical drawing tools that can help like a French curve and a flexible ruler. There are also templates of various sizes that can be used. I think someone already mentioned that two thumb tacks and a loop of string will also give you an ellipse. They can also be constructed with a compass using four compass points constructing each arc independently and joining them. You might want to search for "technical drawing tools" to get a better idea of your options,
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With Windows 11 around the corner, I am pondering whether I should do a clean install or not, when it arrives. I kind of enjoy doing a clean install, but at the moment I have so much stuff on my desktop that it may take the better part of a day.
What are other members planning to do? Maybe this is a topic for a new survey?
Get me coffee and no one gets hurt!
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My way of upgrading Windows is to save up for a new PC.
One usually needs the new hardware anyway.
Bastard Programmer from Hell 
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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If you can afford it - that's undoubtedly the best way to go!
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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Yes. At a stretch I can maybe afford a new drive for my current machine to go with the new Windows! 
Get me coffee and no one gets hurt!
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When VMs are updated to support it, you might try it out for free by installing a trial edition in a VM (e.g. VMware player, which is free for non-commercial use). This wouldn't give you feel for its true speed, but everything else should work like normal.
That's what I did before migrating to Windows 10.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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Good point! Thanks!
Get me coffee and no one gets hurt!
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I agree on the VM approach, I always try new major releases in a VM first
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