circumference staying the same on shape change in a software???

[MadKad]

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.

[firebird]

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

[BobWarfield]

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

[Bluechip]

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/answer/ellipse.htm#exact

Sooner you than me 

Dave

[mklotz]

What are you trying to do that raised this question?

[Maryak]

Just a thought,

What if you convert your circle to a polyline/polygon with trashtrashtrashtrashtrash?? sides

[Tin Falcon]

The ratio of a pumpkins diameter to its circumference is  .........
Marv is gonna love this one ...
Pumpkin PI
Tin

[mklotz]

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

[Tin Falcon]

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)
Tin

[MadKad]

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/e9/d/AAAAArwi-ZYAAAAAAOnWog.jpg

but want to do shapes like these:
teardrop
http://cn1.kaboodle.com/hi/img/2/0/0/be/0/AAAAAgnfRPoAAAAAAL4Kwg.jpg
http://www.tajarts.co.uk/shopimages/products/thumbnails/HSPth.jpg
http://www.tajarts.co.uk/shopimages/products/normal/HTP.jpg

But these go in the ear lobe, and lets say they have a round one at 10mm and 31.4trashtrash 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

[zeusrekning]

Cool Karl, But I bet a bunch of old farts are thinking... "WTF?"
 
I love the old guys just givin em hell.
I have never seen the shaped ones. I used to have a zero gauge (I think) in my ear but got to be a pain. I couldn't keep up with the rings and had to use other stuff. What materials are you using?

[MadKad]

Cool Karl, But I bet a bunch of old farts are thinking... "WTF?"
 
I love the old guys just givin em hell.
I have never seen the shaped ones. I used to have a zero gauge (I think) in my ear but got to be a pain. I couldn't keep up with the rings and had to use other stuff. What materials are you using?

They are probably thinking its not right also lol

I use

Acrylic
woods (only the safe and all have warnings)
Delrin
PTFE (virgin)
Serg steel
and my best Titanium (nice and safe)

I will use all other organic items also, if the customer knows what they are doing and asks for something (like a wood) as long as they know how there body works and I warn of the some small risks involved then I will use what they like (if its safe and its OK with there body)

[BobWarfield]

This old fart is thinking much as I hate either piercings or tatoos I sure hope my kids choose the piercings.

Wince,

BW

[Maryak]

Scratch my previous thought

How about a backwards approach i.e. draw the teardrop first, work out he total length, which should be the circumference of the circle required.

See attached PDF

Hope this helps

Bob

[Cedge]

Silly Tin man... Everyone knows pie are round.... cornbread are square.

Steve