Civil 3D – Existing Pipe Network Tip

We often do not create any Pipe Networks to represent the existing utility mains in a project.  There is usually limited information on the correct depth of the utilities, even with a utility spot.  The best we can hope for is to draw the main in the plan view based on paint markings, and draw the crossings in our profile manually based on an approximate depth after a phone call to the respective agency.

On a recent design, not knowing the depth of the existing utility mains was a problem.  We have Force Main and Water Main running along and under a dirt road that will be paved.  Everyone is concerned that vibratory packing will cause a problem.  So they potholed the lines.

Now I have 3D point locations along 2 mains.  A pipe network would be best, so that it is easy to bring into my profile, and can be managed by styles. This presents a nuisance since the locations are on top of the pipes, and there are a lot of locations; that’s a lot of pipe edits.

Here is what I came up with.  Again, not rocket science, but I hope that it will help someone else. 

• Style the points so that it is easy to discern them from others. 
• Make the style respond to the elevations. 
• Create a 3D polyline from point to point
• move the polyline down the HALF (see below) the respective inner diameter plus one wall thickness.  I used he move command.
• Make sure the Pipe style prepared as desired, and the correct pipe size is in the Parts List.  Don’t forget the wall thickness
• Create Pipe Network from Object
• Add the network to your profile

Half the diameter

The reason for this is that the Create Pipe Network from Object will use the elevation of the 3D polyline for the CENTERLINE of the pipe.  If you move the polyline down a full diameter, then the pipe will be created too low.  I mean to tell you that is a lot of edits. 

Civil 3D – Some Basic Gradings Terms

Gradings are wonderful things.  Problematic as they may be, they have been quite useful, even back in LDD.  The new Gradings have a host of settings and features that carry with them new terminology that is sometimes confusing.

In light of studying preparing for the Grading Lab I will assist with, I thought it would be nice to explain some of the terms that are often hard for new users to get a grasp of.  It’s not that they are inappropriate, but they all start to sound the same to a new guy.

Gradings, Grading criteria, Grading Criteria Sets, Grading Groups…..  See what I mean?  Today we’ll take a brief tour of these terms.

Terms

 Grading – This is a 3D object that all the fuss is about. 

This It is built on a frame of feature lines (rough interpretation) and autonomously projects its own set of faces, based on instructions that it was assigned.  This instruction set known as a Grading Criteria, is stored within the Grading object, allowing the object to follow it’s instruction no matter what changes to its environment occur.  Objects created by Gradings can be as simple as a single Grading building pad, or complex grade scenarios, such as a littoral shelf detention pond, that might contain numerous Gradings.

 Grading Style – The style applied to the Grading that controls its appearance.

This can be found in the Grading section of the Toolspace Settings Tab.

Civil 3D – 2010 Assembly Link Tip

An associate contacted me recently regarding how to move 2 sets of train tracks through a single corridor, while keeping the ability to deviate the overall width.  The example I received had the sets of tracks identically elevated and on a single bed.  I decided to go a bit overboard, and add vertical and horizontal control.

Above you can see that I mocked up something real fast.  2 separate alignments, and 2 respective profiles.  I wanted to create a open area in the middle to add a freight depot.  I used the profiles to help me adjust the grades for the buildings.

The Assembly

Here is the first half of the solution.

I’ll list the steps below the example image, and then I’ll discuss some important items afterward.

Civil 3D – SAP Roundabouts

Back to SAP – Point Clouds

Previously I discussed being invited to watch a preview of the Civil 3D 2010 Subscription Advantage Pack, and had been quite surprised at the features.  We discussed the Point Clouds, and today we’ll peek at the Roundabout Layout.

Roundabout Layout

This was cool.  Dana Probert showed us how easy it was to start the tool, pick incoming alignments, preset standards, and a variety of options to include, like offsets, widths, standardized markings, etc.  The configuration pages were huge, but most had presets available, making it easy to run through typical layouts.  Yes, that’s paint and signage shown in the image, and it updates well.  All the additional alignments are created automatically.

The edits were probably the best part.  The incoming alignments were edited, and the Roundabout would keep up.  Dramatic changes with no tip-toeing at all (Civil users know exactly what I mean).  This thing is sick. You can even add incoming alignments after the fact. There no vertical profiling at this time, but perhaps in the future it will be available. For now you just have to add that yourself.

This was my favorite part of the SAP.  Sadly I have no roundabout designs before me, but I’ll be a lot happier to tackle them in the future.

Civil 3D – SAP Point Clouds

Autodesk released the Subscription Advantage Pack recently, and can be downloaded at he subscription site.  I’ll summarize some of the items that we were shown during the preview.

Point Cloud support

• New point cloud objects
• Control display density, thematic display control
• Ability to snap to points in object

The point cloud utility is included in this SAP to prepare the market, and to stage future integrations into other applications.

Dana Probert added a 1 gig dataset of the Manchester office, and showed us some properties that included dataset count limitation (she was at 500K), and styling (which included display size and categorical coloring by elevation range). While the main dialog was up, I noticed that multiple sources can be used to create the cloud.

It looked awesome.  You could see every detail.  Imagine being able to walk the site, preplan your storage and parking, and see vertical problems that might not have been noted on a survey.

I am concerned about the impact the dataset will have on a processor and RAM.  There is no way currently to thin the cloud density.  Subsequent discussions with co-workers has brought up various scenarios for the use of the tool, but also many reasons not to.

I think that as Autodesk enhances the toolset, and broadens the scope of it’s adaptation, we will see many more demands for this type of data, and many uses we have not yet conceived.

 

Next is Roundabouts!

Civil 3D – Subscription Advantage Pack

Recently Autodesk hosted a blogger day invitation to preview the new Civil 3D subscription advantage pack.

I missed the meeting.  I had formatted my machine, and had no updates or email for a few days.  David Mills was kind enough to get me up to speed.

The SAP contains numerous tools, but here are the highlights:

• Point Cloud support
• Roundabout layout
• Visualization and Analysis tools
• Transportation productivity tools
• Survey productivity tools

Dana showed us the layout of the SAP, which shows up in your toolbox located in the Toolspace.  Each category is contained in the familiar tree view containing Alignment, inquiry, Point Clouds, Points, profile, Roundabaouts, Surface, and Visibility Checks.

I’ll cover various topics on this over the next few days, and add some screenshots as well.

You can download this from the subscription site.  You must have Civil 3D SP2 installed before attempting this addon.

Civil 3D – Lost Corridor Targets

Recently I was trying to work around more an more missing EG data, and trying to retune my corridor to get a early preliminary plan out.  I was so in such a hurry to get thing out, and so frustrated in how things were going, that I failed to retune my corridor after adjusting the assemblies.  I thought it might be a good post.

I am using some lame cross section colors; EG ad FG are the same red.  Sorry.

Notice below that the daylight in the template really isn’t trying.  Where it does cross the FG, the telltale intersection marker is not there.

Think methodically.  The daylight is carried out by following the instructions in the assembly.  Double check the assembly, and we find everything is ok.  We just changed it.

Then the daylight instructions are carried out in accordance with the targets passed down by the corridor.  Check the corridor.

A review the target assignments leads us to the problem.  It can’t daylight if it is blind. 

When we remove and replace an assembly daylight, that old corridor component link is gone, and with it the instructions of what to target.  When the new link comes in, there are no target instructions either since it’s new to the corridor.  So we reassign the targets and rebuild the corridor.

Now the corridor responds properly.

Civil 3D – FileDia Switch

A buddy of mine took 2 subscriptions of Civil 3D home, while brooding over the need to reinstall his Civil application.  2009 or upgrade…. The rest of his project team are on 2009.

It appears as though the whole platform was fouled, because every time he tried to open the non-default drawing, Civil 3D would crash.  I was neck deep in an overdue project, so he went on his way.

This morning he reported to me that before wiping everything, he set his FileDia switch back to 1.  That’s the switch that initiates a dialog for file operation such as Open, Save, etc.  Without the switch, you just get command line options.

I like command line, but not that much…

Lo and behold, everything perked right up.  He was able to recover his drawings, and open anything from Civil, inside or out.

The moral to this story is before you reinstall due to crashing while opening a DWG, try checking your FileDia switch first.  Just type “filedia” at the command line, and set it to1.

Civil 3D – Rotate/Translate selection of Points

In Land Desktop rotating a selection of points was a piece of cake.  Well….if you had Lisp code, and we had tons of it.  Since writing about solutions (and actually solving them) takes more time that writing code, my group doesn’t really have a great deal of new code turned out, and use mostly native AutoCAD/Civil commands and features.  I’d love to finish .NET’ing all my old LISP, but I just don’t have the time and money.  I tried to get dirt on fellow coders, but coercion and blackmail will not work on Christopher (he is a clean cu chap), so I guess I am stuck with work-arounds.

The situation in the image below is nothing new to anyone dealing with Point data coming in, especially when it is fill for an existing design.  The backsight is wrong.

If you don’t have a survey network loaded, then you may be scratching your head.  There are no tools to select a group of points and modify them using standard AutoCAD tools.  You can get a group, but you still can’t affect a group with the touchy feely interface that you understand.

Identify the group of points that are wrong, and make a Point Group, and position it at the top of the Group List.  Set both of it’s styles to be Standard.  Then take the ‘All Points’ Group, and send it just below the new Group.  Set it’s styles to be ‘<none>’ for both styles.  No big Mystery here, just filtering out the problem points.

Now the key is how you have organized your Object Layers.  Mine are all “PNT-*”.  So I go to the command line and lock all layers, and unlock the Point layers. “-la lo * unl pnt-*”

When I window the area, only the visible points will be selected.  All the rest of the entities are locked by layer.  Here a simple rotate by reference command gets me going.

We used to have a really nice tool written by Dexter Lundy, that selected LDD Points by Description, Point Range, and Elevation Range.  That will probably be the next tool I recode.  It wasn’t possible to get it in 2007 when I last investigated it, but I believe it would be a cinch to get working now…..hint hint.

Civil 3D – Find *Bug*

I was correcting a mistake that went out on one of our drawings.  It’s across the Alabama border, and Florida always gets left somewhere on a drawing.

So I used one of my favorite tools – _Find.

Really, none found.  Ok, good. Then I can count on being safe from that embarrassing issue, because I was prudent enough to check.