Cross section measure problem

[mdesign (Marcin)]

I have a cross-section of the 3D scan (mesh) and the NURBS surface (gray is the mesh and pink is the surface). I would like to build a line between them and measure offset length manually in some spaces.
The problem is that Osnap doesn`t want to glue line points on cross-section borders. Why? How to do that correctly?

[wim (Wim Dekeyser)]

Hi Marcin -

@mdesign

The problem is that Osnap doesn`t want to glue line points on cross-section borders.

I’m not sure what you mean by cross-section. Is that a view that is clipped with a clipping plane? If so, in Rhino 7, you can’t snap to the intersection with the clipping plane, that is something that is added to Rhino 8.

@mdesign

How to do that correctly?

If you are in Rhino 7, you can intersect the objects with a plane to create a curve that can be snapped to.
-wim

[mdesign (Marcin)]

Thanks. Now I know that I need to jump into 8 to do what I want.