Boundaries not working with Corridor Surface

[nkamphui]

Dear community,

As the titel says, my boundaries (created by civil 3d as feauture lines from assemblies) are not working everytime. I uploaded a photo to explain my situation. The yellow lines are my boundaries which are supposed to cut my orange surface. But if i set the boundaries in the corridor Properties nothing happens (it doesn't cut the surface). This problem occurs at more surfaces although some surfaces do work with other boundaries. Another surface dissapears completely if i set a boundary for it.

Does anyone have an explantion for this?

Greets

[M_c3d]

You need to add the boundary to your surface not the corridor.

When it generates a surface from a corridor it needs tidied up (by adding a boundary or deleting triangulation) as the software tries to join up the triangulation to be helpful.

Add the polyline to your surface as an outer, non destructive boundary

[nkamphui]

Thanks for your reply, but the lines are no polylines so i can't select them. And the way u describe makes the drawing static and not dynamic. So any changes i make afterwards will not be corrected

[M_c3d]

That's not true, if you add a boundary to a surface, it is simply blanking out part of it. It will still be dynamic to the corridor and will update with any corridor updates.

You need to add a polyline boundary to the surface. You can use your target polylines that you showed in yellow.

[nkamphui]

Ow alright, those yellow lines are feature lines which i can't edit because they are generated from the assembly points. How to make a polyline from this?

[M_c3d]

You can add featurelines as boundaries to a surface via the same method, but this doesnt work for auto-corridor featurelines.

I would suggest simply deleting the excess triangulation, this will still keep your model dynamic

[cwr-pae]

If you add the shrink-wrap boundary to the surface boundary in the corridor and those wild lines appear, it is usually due to a bowties or bad targeting or both. Bad targeting can occur when a target on one side is targeted by an assembly from the other side, such as in a switch back or cul de sac. You can turn on the points for the surface and in the surface style set the non-destructive point style to something distinctive, these points will show up where the lines go wild. Deleting those points from the surface usually fixes the problems with out to much destruction to the surface. How ever, deleting tin components (points and tin lines) can have unpredictable results if the corridor changes. I prefer to locate and correct the error.

To find the error by isolation you can either turn regions off till the wild line disappear, or drag the start or end of the corridor (save as a backup 1st) in increments till the wild lines disappear. Once you find the area you can usually locate the culprit and correct it. If more than 1 error exists you will have to repeat the isolation of regions

[BushW]

Hello @nkamphui

---

@Anonymous wrote:

That's not true, if you add a boundary to a surface, it is simply blanking out part of it. It will still be dynamic to the corridor and will update with any corridor updates.

You can add featurelines as boundaries to a surface via the same method, but this doesnt work for auto-corridor featurelines. 

---

@M_c3d is correct by adding this boundary to a surface, it only blanks out the surface triangulation. If you add the boundary to your surface and make any adjustment to the boundary your surface will update dynamically. 

To create a boundary for go to Corridors => Utilities=> Create Polyline from Corridor and select corridor line to create the boundary. You must PEdit and close boundary to make it a closed boundary. Then you can add that to your Surface=>Surface definition=>Boundaries.

I hope this helps!

Please select the ‘Accept as Solution’ button if my post solves your issue or answers your question so, other Community members may benefit.

Best Regards,

Wendell

[nkamphui]

Thankyou for your reply, i will check it out tomorrow and will let you know if it worked!

[BushW]

Hello @nkamphui

Thanks for the reply back and I hope the suggestions provide work.

Wendell

[BushW]

Hello @nkamphui

I'm just checking in again to see if you need more help with this. Did the suggestion I provided in my last reply work for you?

If so, please select the ‘Accept as Solution’ button if my post solves your issue or answers your question so, other Community members may benefit.

Best Regards,

Wendell

[nkamphui]

I am working on a different project at the moment, i will leave a reply when i continue with the first project. Thanks!

[nkamphui]

So i tried your solution without succes... I can't select the feature lines (it says,this line is not a corridor feature line) But i am 1000% sure it is. Do u have solution for this?

[BushW]

Hello @nkamphui

Is it possible for you to post the drawing for review? 

Wendell