AutoCAD Civil 3D :: Remove Breakline From Surface Using .net API?

May 3, 2012

I see BreakLinesDefinition prop, but only add methods.

I assume the RemoveAt is of no use, as you cannot get the objectID of each breakline to decide if its one that should be removed.

COM is the only way it seems.


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AutoCAD Civil 3D :: Remove (delete) All Breakline Sets Included In Definition Of Surface

Oct 30, 2013

I would like remove(delete) all brealkine sets inluded in definition of surface.

Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;


However, I don´t understand how I can get type of Surface Operation..

This code line doesn´t work.

if (OperationColl[i].GetType().ToString()== "SurfaceOperationAddBreakline")

Autocad Civil 3D 2014 +SP1
Quad Core Intel i7 3770-cpu 3.40Ghz.
ssd samsung 840 pro 512gb+ssd samsung 840 pro 256 gb+1tb hdd
32gb RAM 1600 Mhz.
nVidia Quadro 2000.
Win 7 Pro 64bit

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AutoCAD Civil 3D :: Editing Breakline Within Surface

Dec 3, 2013

I have a point in my surface that has a bad elevation. My question is this, I unlocked the points and edited the point containing the bad elevation and I am wondering why my surface is not automatically updating. I have a breakline in the surface that uses the "bad" point and by editing the point to the correct elevation, I was assuming that my surface would automatically update, which did not happen, so I selected the breakline and edited that also to the correct elev., and the surface still did not update until I chose "rebuild surface" even though I had "rebuild surface automatically" turned on, so I am a bit confused.

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AutoCAD Civil 3D :: Surface Drawing Triangles Across Breakline

Jan 6, 2014

i am trying to add as a breakline. i have not been able to get this particular line to work as a breakline and the surface keeps drawing triangles through the line like its not even there. The figure properties show that it is a breakline. The figure prefix database brings the line style in as a breakline from the start.

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AutoCAD Civil 3D :: Create A Separate Surface Inside Breakline?

Jul 2, 2012

I have created a breakline from a feature line which cuts the triangles of my surface. Is there any way to create a seperate surface from the triangles inside the breakline.

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AutoCAD Civil 3D :: Surface Display Disappears When Breakline Added

Sep 24, 2013

After adding 9 or so breaklines, the display of my surface (e.g. contours) disappears when I add the next breakline.  Based on the surface elevation shown at the pointer location, the breakline seems to have been added and the surface rebuilt. 

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AutoCAD Civil 3D :: Adding Data To A Surface / Non-Destructive Breakline

Nov 7, 2012

When adding data to a surface, there is the option to add it as a "Non-destructive" breakline. [URL] .....

What is this good for? I created a surface, copied it, and created a volume surface between the two of them. As expected, the resultant volume was 0.

I then draw a 3d polyline and snapped to elevations on the surface. I then took that 3d polyline and moved it up 5'. I then added that breakline to the surface as a "Non-destructive" breakline and the resultant volume between the original surface and the one modified with the new breakline was still 0. Absolutely no change was made to the actual surface, it just added additional triangles. 

I'm trying to find a reason it's even option and I'm coming up blank. There has to be SOME reason it's there.

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AutoCAD Civil 3D :: API / Delete All Breakline Sets Included In Definition Of Surface?

Oct 29, 2013

I want delete all breakline sets of one selected surface using API.

There is "SurfaceOperationAddBreakline" but I don´t find "SurfaceOperationDeleteSetBreakline" for example.

Is there other way to delete all breakline sets of one surface?

Later, I want to create one set breakline for each layer which has been selected by user.

I know that I can use qselect, but I want do this process automatically.
Autocad Civil 3D 2014 +SP1
Quad Core Intel i7 3770-cpu 3.40Ghz.
ssd samsung 840 pro 512gb+ssd samsung 840 pro 256 gb+1tb hdd
32gb RAM 1600 Mhz.
nVidia Quadro 2000.
Win 7 Pro 64bit

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AutoCAD Civil 3D :: Error Adding Breakline Message When Editing Surface With Feature Lines

Jul 11, 2012

I am working on a 6 mile highway project whose surface file is 85MB big. So, I created a Data Shortcut of this surface and used this for creating profiles. However, at some locations the corridors go below the surface(as per their original profile) which was not intended. So, I need to restrict the surface to follow the corridors but not go beyond it.

I have created feature lines from corridors and tried to add them as breaklines to the surface. But " error adding breakline" error pops up. 

Is it because I am trying to add the breaklines to the mirror surface which I created from Data Shortcut ??

Will it be useful if I copy feature lines to original surface file and add these feature lines as breaklines in that file??

Windows 7 x 64
Nvidia Quadro 2000
24 GB Ram
i7 960 @ 3.20 GHz
Civil 3D 2012

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AutoCAD Civil 3D :: How To Remove The Loops From Surface

Jun 8, 2013

Today's Question is as mentioned above, How to remove the loops from a surface?

I have a surface created from the points. Eventually it has got many ups & downs in the elevations, so I did delete some of the points from the surface. And due to this, some loops are developed inside the surface itself with the closed boundaries.

I also tried to draw surface lines in those loops, either they get shorten or gets enlarged but does not completely vanishes...

64 bit OS | Win-7 | 3.60 GHz Processor | 16.0 GB RAM | Civil 3D 2013 |

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AutoCAD Civil 3D :: Cannot Remove Points From Surface

Mar 29, 2013

I have an "existing" surface built. But there has been some construction since my company surveyed the site. So, my surveyor went out and got the new points in the area of the new construction. I am trying to remodel the "existing" surface without rebuilding the entire surface. I have removed the old (demoed) points from the point group used to define the surface. But, the points are not being removed from the surface.

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AutoCAD Civil 3D :: Delete A Breakline And Keep It In The Drawing?

Dec 12, 2011

I have a feature line in my drawing. It is one of over 1000 breaklines in a surface. I want to delete it from the surface but keep it in the drawing. How do I do this?

In 2009 this was easy. I could erase the featue line then use the OOPS command to get it back in the drawing. Unlike the UNDO command, OOPS did not put it back in the surface definition. This was a wonderful feature/bug. In 2012 OOPS behaves the same as UNDO.

I found this post regarding finding a breakline in the surface definition but that is not realistic with 1000 breaklines.

Here are a few options I have tried:
Delete all breaklines from the surface and add the ones I want. (This is my best option so far.)Copy the featureline to the clipboard, erase it, then paste it back in. (Copying feature lines to the clipboard, or wblock, is very slow. The feature line should be moved back to the orignal site.)Explode the feature line into a 3D polyline and then convert back into a feature line. (Good option but does not work well for curves.)

Civil 3D 2012 SP3 | Win 7 64-bit SP1
Xeon E5-1620 @ 3.60GHz, 16GB Ram | NVidia Quadro 600

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AutoCAD Civil 3D :: Get Original Vertices (vertex) From Breakline

Nov 5, 2013

I would like to get original vertices(vertex) from breakline.

With  SurfaceBreakline.Vertices  property I can get a ObjectId collection of them but generally will contain more vertex that original vertex because it depend of "weeding factor" values and "suplementing factor" values.

How can I get only original vertex from breakline?Perhaps, API should have other property to get only original vertex from breakline.

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AutoCAD Civil 3D :: Automatically Creating Breakline From Existing Surfaces?

Nov 15, 2012

Our company, was contracted to create a DTM of a residential neighborhood using our Lieca HDS C10 Laser Scanner.  Utilizing the Leica software I was provided LandXML file that contained a 2ft by 2ft Mesh surface along with breaklines for the edge of roadway, driveways and sidewalks, which was imported into Civil 3D 2012.   

Our client now wishes for us to provide them with a breakline for the crown of the roadway.  My first thoughts on calculating such breakline was to set the Contours at an interval of 0.05' to identify the crown of the road, then drawn the break line along the crown based on contours. 

Is there a way to automatically create a Breakline from Exisitng Surfaces? 

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AutoCAD Civil 3D :: Remove Feature Line Used As Break Line When Creating Surface

Dec 11, 2012

I needed to remove a feature line that I used as a break line when creating a surface.   When I removed the feature line from the definition of the surface, the grading did not change.  It appears the points created by the feature line remain which is why grading didn't change.  The only work around was to delete these points. 

I noticed the same thing happens when I removed the surface boundary and inserted a new boundary.  why these points remain and how to remove when I delete boundary and feature line from surface?

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AutoCAD Civil 3D :: How To Correct / Manipulate Surface To Show Proper Flat Surface

Dec 2, 2011

I often have to do storm pond surfaces that (for the purposes of planning) are flat on the bottom. These surfaces are created from a combination of survey data and grading groups and the tin of these surfaces is perfectably acceptable. However, when contours are shown, the flat bottom is shown with contours jig-jagging all over the place.

The attached image shows a comparison of the same pond. The top was created with survey data and grading groups; the bottom was created using contour data only. The generated surface on the top shows the bottom contour going in different directions and has parts where the an expected contour is missing.

How to correct/manipulate the surface to show a proper flat surface?

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AutoCAD Civil 3D :: Reduced Maximum Length For Surface Triangles Causes Surface Holes

Oct 22, 2012

Has instances where you set your tolerance for the maximum triangle lenth to say 50m to reduce the amount of triangles along the edge that run at long distances. When I do this I end up with multiple surface holes and I'm not sure why as there are points in the area.

I thought well maybe it's because i should've reduced my max triangles first then added breaklines. Would this matter? I also thought I could add a line to the surface to fix the holes vs. deleting surface lines along the entire edge of a surface for many many miles.

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AutoCAD Civil 3D :: Editing Existing Surface Using Edit Surface Command

Nov 14, 2012

I am trying to add points into a surface. I have done this before without any problems, but now I am having issues.

When I ID points which makes up the surface it gives me the correct Z level e.g. 24.5m, however when I hover over the surface it shows me the surface name and a different z level e.g. 0.65m. What is the reason for this difference in z levels? I think this may be causing the issue I am having when I add new points.

I select the surface and use the 'edit surface command' in the ribbon, choosing add point. 

When I add a point at the level I require(23.89m), it puts it in a lot higher than the surrounding area, so I tried to put the point in to the lower z levels (0.4m) it puts it in a lot lower!

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AutoCAD Civil 3D :: Volume Bounded By Existing Surface And Design Surface

Dec 10, 2012

My goal is coming up with the volume bounded by the design surface and the existing surface. I don't have the design surface modeled yet.

Do i need to create alignment offsets?. Alignment 1 profile view is also attached. Then Alignment2.

What about starting with alignment1 profile view? Since I have created a polyline as the design profile ?

how do I shrink labels? Where is it in the settings ; the Align folder had been check.

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AutoCAD Civil 3D :: Add A Surface To Blank Drawing / Then Upload DEM Files To Surface

Oct 2, 2012

I am issues with DEM files that I am downloading from the USGS website.I download 24k, elevation for the area I need. I then choose staged 1 second, add a surface to a blank drawing, then upload the DEM files to the surface.

The surface imports correcty, but when I try to import  points taken by a surveyor on the same drawing, they plot incorrectly.The DEM surface and the points from the surveyor do not correspond. Also, the DEM surface is in meters, not feet. I have tried changing drawing settings, datum types, coordinate types, etc.

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AutoCAD Civil 3D :: Change Reference Surface For Surface Elevation Label

Apr 4, 2012

Is there any way to change the referenced surface on a Surface Elevation Label. I can see the surface in the properties but cannot change it.

C3D 2011

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AutoCAD Civil 3D :: Import Surface Into Revit To Merge Surface And Buildings Together?

Jul 29, 2013

I have a project involving 3 programs. I am creating a planned development in 3d to be 3d printed when finished. The project is a 5 acre tract containing 8 buildings. I have built the surface in C3D and each building in Revit. The buildings are not in the same Revit file. For my solid work, I will bring the files over into 3ds Max Design to section into smaller quadrants to build in the 3d printer.

The questions:

Would it be better to import the surface into Revit to merge surface and buildings together?

Would it be better to import the buildings into C3D to merge entities?

Would it be better to bring those entities into 3ds Max and then merge them into one? Will 3ds Max Design allow me to insert entities accurately in the environment?

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AutoCAD Civil 3D :: Creating Subset Surface From Main Surface

Sep 15, 2013

I need to create a sub-set surface from my main surface. not sure what the vernacular is for a "subset surface" in c3d but i do have a feature line that bouinds the desired area, but that is as far as i can solve.

i did try creating a new surface - pasted the main surface in the edit definition, then deleted triangles until the boundary alighned wiht my featureline.  This seemed to work, but  when i view the properties of the smaller subset suface, it shows a mimum and maximum elevation that is incorrect.

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AutoCAD Civil 3D :: Create Cut Fill Surface From Existing Surface

Mar 1, 2013

Im currently using an addon for Civil 3D called Novapoint. It allows me to create 3D models of surfaces made out of 3d faces and easily models cut and fill 3d-models for me.

The only thing i need to create a cut and fill model is one or several ground surfaces (existing ground, earth layers, rock etc. whatever i need) and a closed polyline/3Dpolyline that represents the level I want my cut and/or fill model.

I enter the spcifications I want such as; earth cut angle, rock cut angle, fill angle, select which surfaces i want to include in the model calculation and select the polyline.Novapoint then calculates the cut/fill model from the surfaces to the polyline and models the different cut/fill angles and gives me the results in a 3d-face model and a specification of the volyme of rock cut, earth cut an fill.

1. Novapoint is quite unstable and crashes alot

2. You cant create profiles out of 3d faces

3. Novapoint does not automaticly combine the start surfaces with the modeled cut/fill surface

4. A large surface made out of 3d-faces demands alot of computer power 

So I want to how I do the same that Novapoint does for me in Civil 3D? (I have access to Civil 3D 2007-2013 depending on which one you're using)I know I can take the 3Dfaces i created in Novapoint and make a surface in Civil 3D with them but I want to exclude Novapoint completely.

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AutoCAD Civil 3D :: Corridor Surface Will Not Paste Into Empty Surface

Mar 26, 2012

all of a sudden whenever I run audit on my corridor file the surface definition becomes a snapshot. To add to the drama, the corridor surface will not paste into an empty surface. Why?

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AutoCAD Civil 3D :: Can't Use The Corridor Surface As DATUM Surface

Feb 7, 2013

My problem added with pic ... I want to make volume calculate for sample road project. When I try to  compute materials I cant use Corridor surface for DATUM... There is only target surface on option..

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AutoCAD Civil 3D :: Adding Corridor Surface To EG Surface

Mar 6, 2012

I am trying to visualize a road project. The problems is, whenever the corridor surface goes below the EG surface (when the road is in cut) the EG surface is the only visible surface.

I sort of need to subtract the corridor surface from the EG surface, or merge the both surfaces into one.

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AutoCAD Inventor :: How To Remove Portion From A Part On Surface

Mar 21, 2013

How to remove a portion from this part.  I need the beige colored "lump" removed and it needs to be smooth with the other suffaces.

I can copy the surfaces and then do a patch, but the new surface does not look right.  It has a buldge in it.

Also tried "Delete face" which I use all the time, but it does not work here.

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AutoCAD Civil 3D :: Trim Surface To Another Surface

May 3, 2013

I was wondering if there is an easy way to trim one surface to another.  Right now, I have two slopes (3:1) that are perpendicular to each other. They meet at a corner and I have extended them past each other so that I could see the intersecting edge.  Now I would like to trim them to each other like you would a polyline etc... but I am not sure how to do this.

If I select surf trim, it tells me they are the wrong object type, but they are tin surfaces?

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AutoCAD Civil 3D :: Surface Boundary Only Showing Portion Of Surface Within The Boundary

Oct 24, 2012

I used a 2d polyline to create a surface boundary for a surface created.  The polyline is a closed loop.  For the boundary type it is outer, unchecked Non-destructive breakline, and mid-ordinate distance = 1.

My problem is that when I do this I only get a small portion of the surface to show up within my surface boundary.  If I don't have a surface boundary the entire drawing surface shows up no problem.

The purple polyline is my boundary and the light blue is the surface created within the boundary.

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AutoCAD 2010 :: Create Feature Line To Use As Breakline For The Bottom Of Ditch

Mar 26, 2012

I'm trying to create a feature line to use as a breaklline for the bottom of a ditch. I click on the first contour, elev.678, accept the elevation, click the next contour, select T for transition, then accept the elevation, 677. I would like to end up with a feature line having a first node elev. 678, end node elev. 677, slope -4% (contours are 25' apart). Instead,  The first node is 678, slopes @ -1.33% to an inserted node, elev. 677.1, then slopes at -21.88% to end node elev. 677. What am I doing wrong? I don't see a lot of options here when creating (drawing) a feature line. Should I be using something else to accomplish this task?

C3D 2011

Win XP Pro 32 bit
Win 7 64BIT
C3D 2013

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