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#1 Joseph Smith

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Posted 27 March 2015 - 10:56 AM

Need to draw a dashed ellipse.......since v12.  Still don't think its possible, any suggestions?  (similar to the quick camber arch I drew)

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#2 Yvon Gonthier

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Posted 27 March 2015 - 11:19 AM

Would say that you might have to draw a piece arch

#3 Yvon Gonthier

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Posted 27 March 2015 - 11:20 AM

Would say that you might have to draw a piece arch

Ment 3 piece

#4 Chris Stewart

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Posted 27 March 2015 - 12:18 PM

Sure you can draw a dashed ellipse. 

 

Use the ellipse tool and then block cut it in half and edit line type to dashed. 

 

Or perhaps I do not understand...


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#5 Keith Almond

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Posted 27 March 2015 - 12:20 PM

I agree with Yvon, I'd do it like this ... Not a true ellipse, but probably as close as you need.

 

Thumbnail deleted ..... Refer to Diagram in Post #13


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#6 Keith Almond

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Posted 27 March 2015 - 12:23 PM

That doesn't work Chris, (at least in 2014) it does some odd things with the linetypes.


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There are 10 types of people in this world ....... Those who understand binary, and those who don't.

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#7 Chris Stewart

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Posted 27 March 2015 - 12:25 PM

Works for me.

 

Oh I see what you mean now

-when you make the ellipse small  -try changing the line scale or block cutting the dashes


All comments are my opinion only and may or may not be correct
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#8 Yvon Gonthier

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Posted 27 March 2015 - 12:51 PM

Cutting the ellipse works but is a little touchy. With a dashed line, you have to adjust the "Style scale" for it to show up dashed equally from one end to the other.

#9 Chris Stewart

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Posted 27 March 2015 - 01:07 PM

Oh, and good luck getting the carpenters to build them correctly.

 

Most have forgotten the way to make an ellipse and use that three arc method which does not produce a true ellipse. 

 

http://www.thisiscar...-string-method/


All comments are my opinion only and may or may not be correct
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#10 Yvon Gonthier

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Posted 27 March 2015 - 01:19 PM

Oh, and good luck getting the carpenters to build them correctly.
 
Most have forgotten the way to make an ellipse and use that three arc method which does not produce a true ellipse. 
 
http://www.thisiscar...-string-method/

Interesting. Good thing that we don't have to do this on the computer. Those nails are a killer on my screen ;o)

#11 Keith Almond

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Posted 27 March 2015 - 01:24 PM

Using style scale can work, but the style scale that works varies with the size of the arch.

 

Just a point, but Softplan can draw an ellipse without string. Therefore surely there is a mathematical way of calculating how it should be drawn.


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There are 10 types of people in this world ....... Those who understand binary, and those who don't.

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#12 Todd Williard

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Posted 27 March 2015 - 01:49 PM

Oh, and good luck getting the carpenters to build them correctly.

 

Most have forgotten the way to make an ellipse and use that three arc method which does not produce a true ellipse. 

 

http://www.thisiscar...-string-method/

 

 

They don't need to know how if you spec a product like this

http://arch-rite.com/


V11-V2024


#13 Keith Almond

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Posted 27 March 2015 - 02:08 PM

This method seems to give quite a clean shape (Much cleaner than the last one anyway) - Again, I acknowledge that it's not a true ellipse, but how near does it have to be: Very simple to draw in Softplan.

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There are 10 types of people in this world ....... Those who understand binary, and those who don't.

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#14 Keith Almond

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Posted 27 March 2015 - 05:33 PM

Okay - Much better solution.

 

If you draw a framework like this, and save it as a symbol, you can size it exactly to suit your ellipse - you can also copy and reverse to give a half ellipse. Then draw a dotted spline through all the intersection points. That should give a very quick to draw, ellipse that you can use anytime - Just tested this with a real ellipse ..... Not anywhere close to what I hoped.

 

Back to the drawing board ..... I'm really curious now .... There must be a way!

 

By the way: Why do you need to draw a dotted ellipse?

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  • Ashampoo_Snap_2015.03.27_19h31m11s_001_.jpg

Keith

There are 10 types of people in this world ....... Those who understand binary, and those who don't.

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#15 Keith Almond

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Posted 27 March 2015 - 08:26 PM

I give up .... I lied, I'll probably keep trying to do something forever (or until it works) ....

 

 

The easiest way may be to use one of Softplan's ellipses and draw a dashed spline round it clicking on the edge at various intervals, or live with the dotted line that the style scale gives .....


Keith

There are 10 types of people in this world ....... Those who understand binary, and those who don't.

Softplan user since version 5.5.2.5

www.homehardwarekingston.ca

#16 Keith Almond

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Posted 27 March 2015 - 08:37 PM

Eureka ............ I think this is a bit too much like overkill .....

 

Why did you say you needed a dotted ellipse again?

 

If you draw one accurate ellipse and save it as a symbol you can edit the size and use it again and again.

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  • Ashampoo_Snap_2015.03.27_22h39m19s_001_.png

Keith

There are 10 types of people in this world ....... Those who understand binary, and those who don't.

Softplan user since version 5.5.2.5

www.homehardwarekingston.ca

#17 Chris Stewart

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Posted 27 March 2015 - 09:48 PM

The ellipse is probably something someone with string stumbled on thousands of years ago.

I am certain that it can be described by a mathematical equation because we can draw them in SoftPlan

 

It can be sketched out by locating several points along the perimeter as in the above examples but the radius changes with every point

 

The string method seems to be easy enough to implement particularly if you give the carpenters the instructions and the three points required.

 

I have seen several curves (not necessarily ellipses) that where done poorly just around my own town,   


All comments are my opinion only and may or may not be correct
-Chris

#18 D M

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Posted 23 April 2015 - 01:13 PM

Not really contributing anything to the discussion, .. just thought this was a neat little gif


.. invariably, someone will have a simpler solution.


#19 Keith Almond

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Posted 24 April 2015 - 06:25 AM

The way the string gets "cut" at the pins and "reassembled" at the other side is impressive.

 

Actually a very nice example.


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There are 10 types of people in this world ....... Those who understand binary, and those who don't.

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#20 D M

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Posted 24 April 2015 - 08:16 AM

Yes, .. it looks neat, .. but obviously not depicting real world interaction between string and pins, ..


.. invariably, someone will have a simpler solution.





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