Center of a circle

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 From:  Axel
10765.1 
Hi Michael,

this matter is not v5 beta related, I found this before as well.

Why does the center of a circle disappear? It is very helpful to pick a circle up at its center to move and align it. But out of the sudden it is gone and the division in quarter and half is gone as well. Also I observed that sometimes after drawn a circle, the input for editing shows x & y instead of diameter or radius, though I draw the circle from the draw curve menu. Is there a certain pattern I maybe overlooked which MOI uses here?


Thanks and best regards,
Axel
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 From:  Michael Gibson
10765.2 In reply to 10765.1 
Hi Axel,

re:
> Why does the center of a circle disappear?

Basically because it's the same behavior as all curves - once you have drawn a curve points that you used to generate the curve are not displayed anymore.

But it can be targeted by object snaps.


re:
> the division in quarter and half is gone as well.

Could you please describe this part a bit more? I'm not understanding this part.


> Also I observed that sometimes after drawn a circle, the input for editing shows x & y instead of
> diameter or radius, though I draw the circle from the draw curve menu. Is there a certain pattern
> I maybe overlooked which MOI uses here?

This happens because when MoI is analyzing the shape of the curve to determine if it's a circle shape it uses too tight of a tolerance and if your circle is kind of small then there is enough noise inherent in floating point calculations that makes a deviation greater than the overly small tolerance value.

I happen to have tuned this up recently for the next v5 beta, smallish circles should behave better there.

- Michael
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 From:  Axel
10765.3 In reply to 10765.2 
Hi Michael,

thanks for your reply.

QUOTE
re:
> Why does the center of a circle disappear?

Basically because it's the same behavior as all curves - once you have drawn a curve points that you used to generate the curve are not displayed anymore.

But it can be targeted by object snaps.
UNQUOTE

The object snap did not work then suddenly. I cannot pick it up from the center point, nor feom the quarter points. But in general I can pick it up of course anywhere but it's not precise anymore then.


QUOTE
re:
> the division in quarter and half is gone as well.

Could you please describe this part a bit more? I'm not understanding this part.
UNQUOTE

Please see in the picture. This is what I meant with quarter and half division. This is missing when the feature is lost to pick the center point up.

Best regards,
Axel
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 From:  Phiro
10765.4 
Hi,

Could you verify the object snap options like this ?




Have fun !
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 From:  Michael Gibson
10765.5 In reply to 10765.3 
Hi Axel, ok sorry I wasn't understanding your original question properly. I thought you were asking for a new feature to have the center point of a circle to be displayed after it had been drawn.

So the problems with center and quad snaps not working on some circles are related to the other problem you observed when the size readout displays a generic x and y size rather than a radius or diameter value. When a curve is not recognized as a circle that will happen and also it won't have center or quad osnaps set up for it as well.

That can happen currently to circles that are pretty small, it should hopefully be fixed in the next v5 beta.

- Michael
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 From:  Axel
10765.6 In reply to 10765.4 
Hi,
yes, I do have that checked.
Thanks, Axel
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 From:  Axel
10765.7 In reply to 10765.5 
Hi Michael,

thanks yours again and well noted. I was also wondering why this happens so rather randomly and suddenly without editing anything big on a circle.

You said it happens on rather small circles, I do work with small ones, from 0.2 mm for example to just 5 mm. Would that be the range? Then my observing fits with your explanation.


Cheers,
Axel
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 From:  Michael Gibson
10765.8 In reply to 10765.7 
HI Axel,

re:
> You said it happens on rather small circles, I do work with small ones, from 0.2 mm for example to
> just 5 mm. Would that be the range? Then my observing fits with your explanation.

I think it also depends on the distance away from the origin. When the circle is close to the 0,0,0 origin point then smaller values work ok.

Please let me know if you still see it again after the next v5 beta, I think it should be fixed there.

Thanks, - Michael
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 From:  Axel
10765.9 In reply to 10765.8 
Hi Michael,

thanks, will come back here.


Best regards,
Axel
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