The Building Coder

Refresh Graphics, Start View and Excel

Refreshing graphics, exchanging data, setting the start view, and random titbits related to AI, politics and climate – UpdateAllOpenViews – Refreshing spot elevation prefix – Excel data exchange options – Defining the start view – How big is a LLM – Base rate fallacy – Last year was hot – Previous climate changes negligeable – PV panel price trend... Read more →

Lookup Ideas, Jigs and ACC Docs Access

A request for new ideas for enhancing RevitLookup, implementing a pickpoint rubber band and opening BIMs on ACC Docs – Request for RevitLookup ideas – Transient elements for jig – Opening a model in ACC Docs – Stop using JPEG – Stop using voice id... Read more →

Bridges, Regeneration and Modeless RevitLookup

The most exciting RevitLookup enhancement in its entire history, yet another need for regeneration and a great new option for your personal safety – Modeless RevitLookup – Need for regen for read-only parameter – Structural bridge design – Outdoor seatbelt... Read more →

Topo from Lines, Asset Keyword and Regeneration

Two Revit API discussion forum threads reinforce the ever-present need to regenerate, the development team clarifies access to various asset keyword properties, and Harry Mattison shares a free tool to create and update a toposurface from a set of model lines – Asset keyword access – Modifying group requires regen – Modifying part material requires regen – Topo from lines... Read more →

Refreshment, Cloud Model Path, Angle and Direction

An example of real-time live graphical user input feedback, cloud model functionality, the ever important need to regenerate and other important topics for this holiday day – Line angle and direction jig – Determine cloud model local file path – How to refresh GroupType.Groups – Online access to RevitAPI.chm help files – C++/C# frontend engineer... Read more →

Dashboard, Regen and Revit API Panel at AU

Topics to start the week – Revit API panel at AU in Las Vegas – Automatic BIM dashboard data extraction – When to regenerate the document? – RevitLookup centre parent for forms... Read more →

Rotation Adjusts and Fixes Conduit End

I listed several possible approaches to trigger a refresh of an element's graphics display. Here is another one: Applying element rotation to adjust and fix conduit end... Read more →

Cloud Model Predicate, and Set Parameter Regenerates

The Revit API discussion forum continues to reach ever new levels of depth and coverage. Here are a couple of recent topics – Welcome to the top solution authors, Jim! – Setting a parameter to regenerate the model – Checking model for C4R versus local file... Read more →

AI News and Sub-Transaction Regen

Things continue moving fast in AI, and the need to regenerate in the Revit API remains unchanged – AI News – Subtransaction Requires Regeneration... Read more →

WTA Mech and TTT for Provision for Voids

Today is the last day of the Forge accelerator, and I am still working on the ForgeFader project. The topics today are mainly related to Revit, though – Google prettifier on GitHub – WTA mechanical family placement add-in – Provision for void – What is a provision for void? – Creating a provision for void... Read more →

Need for Regen and Duplicate Parameter Access

A Python Revit API question on renumbering viewports helps highlight two separate important programming aspects; I also add some other notes from the Munich Forge accelerator – Question – The need to regenerate – Use built-in parameters to access parameters – Forge accelerator and outage report – Added materials to 210 King model... Read more →

Need to Commit Twice, Roomedit3dv3 and Forge

Lots of exciting news for today, like every day, once again on the pure Revit API, connecting the desktop and the cloud, and Autodesk Forge – Isolating an element in a newly created view requires two transactions – Forge research enquiry – Connecting desktop and cloud – Roomedit3dv3 live – Could you demo this remotely? – Connecting desktop and cloud draft handout – Table of contents... Read more →

Idea Station and TextNote Bounding Box

Thank you for your questions during the Autodesk answer day. I am still busy supporting the Barcelona Forge Accelerator participants in the Autodesk office. I am also working on a very exciting new project connecting BIM and the cloud using a direct socket.io connection to communicate changes back to the desktop, instead of the inefficient polling mechanism I implemented in previous projects. Once again, it consists of two parts, the node.js web server and View and Data API handler and the C# .NET Revit API add-in client – Revit Idea Station – TextNote Bounding Box Requires Regen – Regeneration Performance Benchmark... Read more →

Idling, DMU, DocumentChanged and Need for Regen

Today we have two ever-recurring topics to revisit: a discussion on how to react to a document modification and yet another example of the need for regeneration – Idling and external events, DMU and DocumentChanged – Need for regen in an updater... Read more →

Connecting Desktop and Cloud at AU and DevDays

I am still working on my Autodesk University preparations, and, as always, lots of Revit API cases, both from ADN and Revit discussion forum threads. Let's look at the current state of affairs regarding AU, DevDays, and two of those threads – AU 2015 – Connecting Desktop and Cloud for AEC – Regeneration invalidates all geometry – Autodesk DevDays 2015 and Cloud Accelerator Week... Read more →

Rotation by π and NewSweptBlend Using Arcs

Let me address two questions concerning form generation in family documents raised by Alex Hearn: Rotation by π NewSweptBlend using arcs Among other things, the answers also demonstrate some trivial migration steps of the form generation code from Revit 2012 to 2015 and, yet again, the occasional crucial importance of regeneration. Rotation by π Question: I am exploring and really enjoying your blog site. Thanks for all the detailed information. I have been attempting to build a Revit translator that... Read more →

Activate Your Family Symbol Before Using It

Here is an interesting case with a simple solution that was rather hard to discover. In summary, you need to ensure that all family symbols are activated before making use of them. Question: I'm having a strange problem when replacing curtain walls by windows in Revit 2014. When I run my add-in command, all the curtain walls are successfully replaced by the window family instances. All except the first also cut the hosting wall in the proper manner. The first... Read more →

Refresh Element Graphics Display

I talked about how to refresh element graphics display back in 2011, and it seems like the time has come to revisit that topic. After that, I also want to mention an approach to determine the height of a schedule in a sheet and how to avoid running a web server. Refresh Element Graphics Display Afshin just submitted a comment about this on replacing an Idling event handler by an external event, and another developer asked something similar today, so... Read more →

Transaction Group Regeneration for InstanceVoidCutUtils

We looked at a nice example of using Boolean operations and InstanceVoidCutUtils back in the year 2011, cutting out part of a beam using a void cutter family. I tried to make use of this again in a recent Revit API training and was somewhat shocked to discover that it did not work as expected. I checked all the prerequisites were fulfilled. Void Cutter Family First of all, the void cutter family must have its 'Cut with Voids When Loaded'... Read more →

Erasing Extensible Storage with Linked Files

Here is a query and resolution raised by Marc in the discussion forum on erasing extensible storage data with linked files, followed by a reminder of the need to regenerate the model to avoid accessing stale data and hint of possible things to come related to Revit and cloud computing: Erasing Extensible Storage Data with Linked Files Question: I am calling the method Schema.EraseSchemaAndAllEntities in a project containing linked documents, and it is throwing an InternalException. How can this be... Read more →

Extra Transaction or Regeneration Required

Whenever your add-in modifies the model in any way and you wish to query the Revit database, you need to pay careful attention to ensure that you do not retrieve stale or invalid data. If anything unexpected whatsoever happens, one of the first things to consider is the possible need for a document regeneration or additional separate transactions between steps. These kinds of issues arise frequently. I discussed adding an extra transaction to modify beam parameters and add openings to... Read more →

Updating Properties and Announcing Revit LT

Today, exceptionally, a second post, partly to highlight an interesting comment submitted by Jinshou on how to programmatically trigger a refresh of the Revit element properties window, and partly to announce a non-API issue, totally non-API, the imminent arrival of Autodesk Revit LT. Refreshing Revit Element Properties If I first invoke the UIApplication OpenAndActivateDocument method, then highlight elements as described in a previous post, the 'properties' window is updated. The trick is that in order to call OpenAndActivateDocument on the... Read more →

Creating an Opening

Here is a question that we have looked at in the distant past, brought up again and reinforced by Jon Mirtschin of Geometry Gym, working on BIM and model exchange with Rhino, Grasshopper et al: Question: Sorry to bother you, but trying to get a quick answer to this problem. If you happen to have 5 minutes to help, it will be greatly appreciated. I've attached a sample Revit project. It simply creates a polyline curve array and slab outline,... Read more →

Scope and Dispose of Transactions

Arnošt Löbel added an important comment on the sample code that I published for refreshing a view: It is for the best if all transaction objects are always properly scoped, e.g. within a C# 'using' block. This includes transactions, sub-transactions, transaction groups, and other scope-like objects such as StairsEditScope. Not doing so can yield some pretty weird situations when exceptions come into play. In your example, proper scoping can be implemented by adding 'using' statements, which automatically dispose of the... Read more →

DevCamp and Refresh Display for a Kinetic Facade

Welcome back from the Easter break, if you had one. We are pretty busy right now preparing for our next conference, the DevCamps. Ah yes, and before that I have to get ready for the Revit API Training in Munich coming up soon. AEC DevCamp and DevLab – Join us at Camp this Summer! The bi-annual Autodesk AEC DevCamp is taking place near Boston on June 6-7. DevCamps are held every other year where software developers like you can learn... Read more →

Refresh Element Graphics Display

Here is a little issue with an interesting workaround that I encountered in the past in similar incarnations in other CAD software packages besides Revit, so it is worthwhile making a note of this for potential future use almost anywhere. The issue has to do with refreshing the graphics display of individual elements in the Revit user interface. Committing the transaction, explicit regeneration, and even calling RefreshActiveView does not help. One additional thing that sometimes does help in similar situations... Read more →

Migrating the Building Coder Samples to Revit 2012

This is the third migration of the The Building Coder samples, after moving from Revit 2009 to Revit 2010 and then to Revit 2011. The move from 2010 to 2011 was a tougher round with many changes. This time around, from 2011 to 2012, it is quite easy and straightforward again. For details on what needs modifying, as always, please refer to the Revit 2012 SDK documentation and especially the chapter 'What's New' in the Revit 2012 API help file... Read more →

Setting Duct Width and Height Requires Regeneration

Whenever you have a problem modifying or querying the model with your Revit plug-in, one of the first things to check is always your regeneration mode. If you are using the manual regeneration option, you need to check whether you possibly omitted a required intermediate regeneration call. It seems that there can never be enough reminders of this. Here is another case at hand: Question: I am sizing rectangular duct fittings through the API, and I noticed that the different... Read more →

Setting Text Width Requires Regen

I presented a general introduction to the topic of regeneration in the discussion of my first Revit 2011 add-in, the pipe to conduit converter, and in Kevin Vandecar's performance tips and tricks. We discussed the danger of lacking regeneration calls, best regen practices and some performance issues quite a while ago, and an example of problems resulting from accessing stale data in the location curve of a newly inserted family instance. Here is another interesting and very clear little example... Read more →