Dimensioning radii in Layout Rhino 8

Rhino
1

Hi All,

I have a form with a series of tilted curves which are not aligned with the c plane.

I am trying to dimension the radii in layout view, but the values are different from the actual radius of the curves.

side view
front view

This shows the front and side views of the form.

These dimensions need to be correct for fabrication.

I don’t want to dimension the radius as seen in the layout view (as it is at an angle to the view so irrelevant), I want to dimension the actual radius of curve.

Is that possible?

I hope there is a simple fix for this.

Cheers,

Geoff.

2

You can use a Leader and set it to Curve Length. Divide the circumference by (2*pi) and the result is the radius.

R%<CurveLength("6b0f63b1-8188-4867-bb88-4241052331de")/(2*pi)>%

image
image2366×1158 52.4 KB

1 Like
3

nice workaround @martinsiegrist
I do find the behavior in layout odd though so I made:
RH-83090 DimRadius in layout behavior

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4

Thanks, yes this looks weird:

image
image1666×1146 45.4 KB

5

Hi Martin and Gijs,
Thanks so much for your replies!
It certainly is strange behaviour and I don’t see a reason for the radii tool to work as it does, in fact it has the very real potential to lead to fabrication disasters as an incorrect radii might not get picked up until the sections are already rolled… A potentially costly error for the unsuspecting fabricator.
Thanks for the suggestion of using a Leader, ill try that, although it would be so much better if the tool just dimensioned the true radii in the first place.
Thanks again for your advice, hopefully McNeel takes a look into it…

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