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Old 10-02-2008, 08:00 PM   #1
MadKad
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Default circumference staying the same on shape change in a software???

Hi

this is probably the strangest question you may have seen, but I need to ask some one and I thought that some one on here might no

OK I need to know if there is a softwere that I could say place a 10mm circle image and then change its shape to any shape I want but still keep the overall circumference the same.

I use Alibre and photoshop 7 but don't think they do it (could be wrong)

I am at my last straw on how I could do this lol

Thanks,

Karl.


 
 
Old 10-02-2008, 08:22 PM   #2
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Default Re: circumference staying the same on shape change in a software???

Hi Karl

Do you mean like this?



Start with a circle (the top one) then change its shape like the next two. I'm no CAD expert but if thats what you are after I did this on Coreldraw.

Cheers

Rich


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Old 10-02-2008, 08:35 PM   #3
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Default Re: circumference staying the same on shape change in a software???

I'm assuming he wants to look at that circumference like a length of string that is fixed, and if you deform the string it doesn't grow longer or shorter.

I can deform the circle similar to what Rich shows in Rhino, but I don't see a way to preserve the "total length of the string".

Best,

BW
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Old 10-02-2008, 08:51 PM   #4
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Default Re: circumference staying the same on shape change in a software???

Hi

I wouldn't bother .. even if you deform a circle to something approximate, ie. an ellipse, a squashed circle, it gets really out of hand.

Try this http://home.att.net/~numericana/answ...ipse.htm#exact

Sooner you than me

Dave
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Old 10-02-2008, 09:03 PM   #5
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Default Re: circumference staying the same on shape change in a software???

What are you trying to do that raised this question?
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Old 10-02-2008, 09:20 PM   #6
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Default Re: circumference staying the same on shape change in a software???

Just a thought,

What if you convert your circle to a polyline/polygon with xxxxxxxxxxxxxxx?? sides :P
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Old 10-02-2008, 10:50 PM   #7
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Default Re: circumference staying the same on shape change in a software???

The ratio of a pumpkins diameter to its circumference is .........
Marv is gonna love this one ...
Pumpkin PI
Tin
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Old 10-02-2008, 11:09 PM   #8
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Default Re: circumference staying the same on shape change in a software???

Quote:
Originally Posted by Tin Falcon
The ratio of a pumpkins diameter to its circumference is .........
Marv is gonna love this one ...
Pumpkin PI
Yes, and a pizza of radius "z" and height "a" has a volume given by:

pi * z * z * a
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Old 10-02-2008, 11:28 PM   #9
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Default Re: circumference staying the same on shape change in a software???

Quote:
Yes, and a pizza of radius "z" and height "a" has a volume given by:

pi * z * z * a
Love it Marv
Actually in this part of the country Pie r rectangular (Tasty Cake Pies)
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Old 10-03-2008, 12:25 AM   #10
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Default Re: circumference staying the same on shape change in a software???

Firebird thats right but with what

BobWarfield said ie. the string needs to stay the same, like a squashed circle this still keeps the circumference over all and is right in what I ment to say lol.

Bluechip, thats the maths side of it and confuses the hell out of me lol

mklotz
, it because I make jewellery like this:

round: http://cn1.kaboodle.com/hi/img/2/0/0...AAAAAOnWog.jpg

but want to do shapes like these:
teardrop
http://cn1.kaboodle.com/hi/img/2/0/0...AAAAAL4Kwg.jpg
http://www.tajarts.co.uk/shopimages/...ails/HSPth.jpg
http://www.tajarts.co.uk/shopimages/...normal/HTP.jpg

But these go in the ear lobe, and lets say they have a round one at 10mm and 31.4xxxxxx circumfrence, well the teardrop one would need to have the same circumfrence (the square or any other shape with straght sides is easier)

Maryak, sorry I dont understand what you mean?

lol and you others are mad


 
 
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