Dim angle doesn’t work on a curved surface

Rhino
1

Just wondering if there is away around this. So i have a part that is not straight from the top view

image
image596×638 4.94 KB

when i use a view port in the layout mode i cant get it to select the edges to give me a dim angle.

image
image614×634 1.22 KB

At the moment i have to draw a line either in layout or on the cp as a different layer then hide it, is this a problem in rhino or am i doing something wrong.

Using Rhino8

Cheers
William

2

Hi William -
I can’t tell from those images what I’m looking at. Please post the 3dm file.
-wim

3

part.1.3dm (4.0 MB)

Here is the part, so basicly the part has a slight curve from the top veiw

image
image596×638 13.8 KB

so when i try to select that edge to do a dim angle from a side view it is unable to select that line.

image
image614×634 2.8 KB

im trying to get this angle in paperspace through a viewport.

4

Hi William,

You need to do a little extra work to get this:

image
image1902×1466 210 KB

Draw two helper lines on a separate layer:

image
image944×731 168 KB

Then draw the angle dimension between those lines on another layer and change the visibility of the helper lines layer so they are hidden and the dimension layer so it only appears in the layout where wanted. For example:

image
image1902×1466 210 KB

This while in model view:

image
image946×280 17.1 KB

This while in the layout detail where you want to see it:

image
image948×314 18.1 KB

And this for each layout detail where you don’t:

image
image949×290 17.9 KB

I tend to keep the helper lines visible in the model view as a reminder that they need to be reworked if the model is changed.

HTH
Jeremy

5

Hi William -
Thanks for that file!

Yes, those edges aren’t lines, and thus the command doesn’t let you select those.
You can use the DimCreaseAngle command to create that dimension, but you currently have to do so in model space. I don’t see why one shouldn’t be able to select those surfaces in paper space, so I’ll get that issue on the list for a closer look.
→ RH-87737 Detail: DimCreaseAngle Access
At any rate, you can create that dimension in model space and use ChangeSpace to bring it onto the layout.

Normally, you should also be able to create a clipping plane and then dimension the clipped view in a detail. It looks like this is not quite working as it should…
→ RH-87736 DimAngle: Fails in Ortho View
-wim

6

Thanks for the reply Jeremy, helpful tips.
cheers

7

Thanks for the reply’s and for going further and trying to solve the problem :+1:

cheers

8

RH-87737 is fixed in Rhino WIP