Hiding Surface Data in Cross Sections

[camden.n.dean]

I have a new predicament.

I have two surfaces of importance. One is EG. The other is the required beach design (REQ).

On the cross sections, I want to trim REQ where it intersects with EG.

In the past I have accomplished this by using MINIMUMDISTANCEBETWEENSURFACES to find the intersection, and then using that pline as a boundary on the REQ surface.

The issue this time is that REQ is drefed into the drawing which is not allowing me to add a boundary.

The options as I see it are this:

1. Promote REQ in the current drawing
   • this is bad because I would like to keep the dynamic link that the dref provides
2. Put the boundary on REQ in the source drawing
   • this is bad because we need the full, projected design for a few other sheets.
3. Find a new way to trim/hide the portion of the section that I dont want to see.
   • this is why i am posting to the forums

Does anyone know other ways to accomplish this? Surface masks were intriguing at first, but it looks like they only affect the plan view.

Below figures explain the issue visually.

Fig. 1: End Product Example. Notice how REQ (and the dashed tolerance above it) terminate at EG.

Fig. 2: Current Section. Red box around the portion of REQ that should be trimmed/masked.

-Camden

[tcorey · Accepted solution]

You're using a Corridor? You should daylight to the OG Surface. Make a corridor surface and include that in your Sample Line Sources. It will display in the Section View truncated to the OG surface daylight point.

[camden.n.dean]

Thanks for the reply @tcorey!

Unfortunately I haven't convinced the office to start using corridors for these projects yet. It is a surface built from feature lines that are being used as breaklines.

The big hang-up is that I need to be able to go back and forth between the truncated version and the non-truncated (i typically call this the "projected") version.

I guess if I had a corridor model, i could daylight as you suggest, drop a point/FLIN there, and then continue to project past the daylight intersect and put another point/FLIN there. Then when making the corridor surfaces, the truncated surface would just use the daylight FLIN whereas the projected surface would use the projected FLIN.

That might be a little confusing to read, but I'm keeping it in the post because it is a great idea that I hadn't considered!

For this project, since I am stuck sans corridor, I guess I'll just sacrifice the dref and promote the surfaces.

[tcorey]

You can add a boundary by making a new surface, pasting the reference surface into that and then adding a boundary.

[camden.n.dean]

Ah, duh! You're absolutely right. I should've thought of that as another approach. Thanks again, Tim!