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 :: 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 :: 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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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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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 .NET :: How To Populate Data Type Using Loops

Apr 26, 2011

I have to add 80 Xdata to some objects. How to populate them within a loop. This what I did for 11 of them . But

I am pretty sure there is a way to do it in a loop which I don't know .

 Public Sub SetXData2()
Dim doc As Document = Application.DocumentManager.MdiActiveDocument
Dim ed As Editor = doc.Editor


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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 Inventor :: Getting Closed Loops From Polylines In DWG Files

Feb 26, 2012

I am trying to import a complex curve from autocad lt (in my case an airfoil), to create parts.  I have drawn the curve in autocad lt as a polyline.  Autocad lt treats the curve as a single object, and seems to understand it as a closed loop. 

When I import the curve into Inventor lt, Inventor treats the curve as a series of unconnected line segments.  What can I do in either Autocad lt or Inventor lt to get Inventor to treat the curve as a single object, so that I can then extrude it?

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AutoCAD Inventor :: Ensuring That Sketches Are Closed Loops?

Mar 7, 2013

I am making some fairly free form sketches using lots of 3-point arcs that ultimately need to be closed loops so that I can extrude them. Although I have always been letting one arc snap to another at the end of the process I seem to have trouble closing the loop. It does not seem very apparent how to find the points that are not properly closed and I wind up struggling with the Close Loop function. Is there an easy way to tell where the problems are in a profile? I have tried showing all constraints, but that doesn't necessarily give me the clues I need.

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AutoCAD Civil 3D :: Export Created Surface From Civil To Revit Architecture

Dec 17, 2013

Is it possible to export created surface from civil to revit architecture? If yes , How? And if its not possible - maybe i can somehow import cogo points to revit?

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AutoCAD Inventor :: Self Intersecting Paths Or Loops Are Invalid For Operation?

Mar 9, 2012

In regards to sweeping, what does the title of the post mean (self intersecting paths or loops are invalid for this operation). I have a 3D sketch consisting of 1 straight line, one spline with 4 points dictated by 'points' and an arc. All have tangential constrains to each other and I am looking to sweep a circle along this path to create a bent wire. I don't have anypictures or files as it is a stand alone computer at the moment.

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AutoCAD 2010 :: 3D Shell Command - Face Loops Not Repairable

Jul 19, 2013

When trying to use the 3D shell command, I receive "Face loops not repairable" error. Why I get this error?

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AutoCAD Inventor :: Add Closed Sketch Loops To Existing Feature?

Nov 26, 2012

is there a way to use vb to add closed sketch loops to an existing feature?

I am trying to create a parametric template for a fan guard assembly, complete with drawings.

I am using an arrangement of circles defined using some linear sketch patterns as the cross-section of a revolved feature.  Using ilogic/vb, I want to automate the number and spacing of items in the linear pattern, and then update the loops selected for the revolved feature.

I have found code on this forum (courtesy of Curtis Waguespack) that I can use to select all closed loops and create a feature.  I can apply this code to create a NEW revolved feature, but I haven't been able to figure out how to use it to UPDATE an existing feature.

I need the feature to UPDATE rather than create new to maintain links in my assemblies and drawings.

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AutoCAD Inventor :: Avoid Redundant Points And Open Loops In The Sketcher?

Nov 2, 2011

It happens often that a sketch has redundand points or open loops.

I don't want to run the sketch doctor to clean it up every sketch I create.

In the attached avi you can see the few steps that I use to create a sketch. I don't understand why at the end it has problems.

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AutoCAD Inventor :: Merge Points - Close Loops To Have Valid Extrusion Profiles

Jan 24, 2013

Why does this code fragment not work? (Within an active part sketch, with some sketched geometry.) 

I'm just trying to close the loops to have valid extrusion profiles.

Dim iCounter As Integer
Dim icounter2 As Integer
Dim oSPoint1 As SketchPoint
Dim oSPoint2 As SketchPoint
Dim xVal1 As Double


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3ds Max Modeling :: T-loops Spiraling Out Of Control

Apr 17, 2012

I'm having a huge issue in trying to prevent t-loops in my model. Every time I try the Cut and Loop technique to make more edges in the hopes of getting rid of the t-loops, the new loops keep "spiraling" if you know what I mean (in the attached image, the selected edges are the same line). As a result, more and more unwanted t-loops keep appearing and they have nowhere to connect and it prevents the model from working in Mudbox.

3DsMax and Mubox versions: 2012
Currently studying E-Media

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CorelDRAW X5 :: Detecting Loops Or Crossed Lines

Dec 28, 2012

Is there a command to find loops and crossed lines in curves/lines.

I've been playing with Powertrace and noticed that quite often the lines/curves will have loops in them, particularly at sharp bends.

I have to zoom right in to see these but this is a very painstaking and slow method of finding these. I use Draw primarily to get cut paths so there can't be any crossing lines. Visually the drawing can look good but cam software finds these loops as tiny as a few thousands of an inch.

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