The Building Coder

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 →

Flip, Mirror, Transform and Transient Graphics

How are reflections like flip and mirror reflected in the BIM element transform? – Transient elements hack – Temporary incanvas graphics API video – Shared versus non-shared parameter creation – Direct PDF export and DA4R... Read more →

PDF Export, ForgeTypeId and Multi-Target Add-In

Revit 2022 has been released. Two important features are parameter API enhancements and built-in PDF export functionality – Replace deprecated ParameterType with ForgeTypeId – Multi-target 2021 and 2022 using MSBuild – PDF export default paper format can fail – PDF export output file naming – Five beginner mistakes... Read more →

Parameter Filter Checking Element Type and OCR

An important insight in using a filtered element collector with a parameter filter, a handy open source OCR tool and a few productivity tips – Parameter filter also checks element type – Capture2Text, a handy OCR tool – Productivity tips... Read more →

Forge at AU and Open Source Property Access

Today, we take a look at a fix for the RvtVa3c custom exporter and a Forge issue related to Revit property access – Pull metadata from RVT in BIM 360 – Forge at AU class recordings – RvtVa3c updated and issues fixed... Read more →

Simple IUpdater and other TBC Updates

A nice new minimal DMU example and updates and enhancements to several other important sample applications – Simple dynamic model updater example – ExportCncFab SortMark update – RevitLookup exception on view GetTemplateParameterIds... Read more →

On Spaces in Help and Renaming a Parameter

I am busy as ever in the Revit API discussion forum. Today, let's highlight a couple of items that were not discussed there – ContextualHelp with space – On renaming a shared parameter – Build a minimal neural network from scratch... Read more →

Optimising Parameters and Full-Text Search

I have been dabbling with the Go programming language in the past week, besides optimising and answering Revit API questions – Optimising setting shared parameters – Full-text search for The Building Coder posts – Decimal point woe... Read more →

Custom Parameters and Tile Packing

Parameter changes and tile packing using the Revit API and AI, plus some other notes on Forge and general stuff – Parameter type changes to Custom – Determining cut tiles in room – Optimal banana sandwich slice packing with AI – Forge solution showcase – Effect of home office on meeting culture – Motivating kids can be harder than business success... Read more →

Duct Shape, BipChecker Facelift and @ Fonts

I begin this week with a rather mixed bag of interesting issues from the last – Get MEP duct shape update – Determining differences between DLL versions – BipChecker facelift – Fonts with '@' prefix... Read more →

Revit 2021 Visual Studio Add-in Templates

Our tidbits for today – Revit 2021 Visual Studio add-in templates – Four important design patterns – Invisible shared parameters don't make it into Forge... Read more →

Compiling the Revit 2021 SDK Samples

Let's start the week with two pretty fundamental topics – Compiling the Revit 2021 SDK samples – Reading the value of a parameter... Read more →

Panel Schedule Slots and Changing Room Level

An amazing solution to move existing rooms between levels while retaining all their information, some thoughts on managing slots in panel schedules, and a couple of useful JavaScript debugging console hints – Moving rooms to other levels – Slots in panel schedules – JavaScript debugging console commands... Read more →

Getting Title Block Data and ViewSheet from View

Today, let's highlight two view related data access topics – Get ViewSheet from View – Title block data access... Read more →

Retrieving the Electrical Load from a Fixture

Today is my birthday, so I am trying hard to work less. Very kindly, Alexander Ignatovich provided a gift for the day in the form of a new external command CmdElectricalLoad in The Building Coder samples. showing how to retrieve the value of the `Load` column in the electrical system browser for a specific fixture family instance... Read more →

Material, Physical and Thermal Assets

Today, we concentrate fully on material, physical and thermal assets – Issues accessing and creating material assets – Access to all material asset properties – No access to material keywords – Access to environment and render settings – Determine full path to texture bitmap... Read more →

Get Project Parameter Id and Prevent Updater Loop

Let me once again highlight two helpful answers in the Revit API discussion forum and the newest pair of Forge Design Automation samples – Get project parameter id from its name – Preventing an updater loop – New Forge and Design Automation samples... Read more →

GetSimilarTypes, SnappingService and Title Labels

So many interesting discussions and inspiring solutions in the Revit API discussion forum! Here are a few, plus one non-forum beginner case – GetSimilarTypes filters for curtain wall door symbols – SnappingService – what does it actually do? – Get title block label parameters... Read more →

Parameters and Hiding DirectShape Edges

I still have a backlog of questions from last week to process. Here are some of the discussions that came up – Shared parameter is either type or instance – Transferring element parameters – Hiding DirectShape internal face edges... Read more →

IFC Update, Instance Geometry, Parameters

I completed the move to my new computer, and happily all systems go now. Here are some other topics that came up in the past few days – Revit-IFC Release 20.1.0 – Community discussion on Revit – Solid or instance, depending – Exporting parameters to Access – Store globals on custom DataStorage, not ProjectInfo – Iranian civil engineering project video... Read more →

Room Closed Shell DirectShape for Forge Viewer

I explored three main topics here at the Forge accelerator – Room closed shell solid visibility in the Forge viewer – Rebar simplification: replace rebar elements with simplified solids or model curves – glTF export – Today, I'll dive deeper into the first – IFC exporter utility adds new built-in parameter – Barcelona Forge accelerator – Room closed shell in the Forge viewer – Triangulate the solid face by face – Triangulate entire solid – Tessellation accuracy control documentation error... Read more →

Accelerator, Dash Pattern Fix, Rotation and Phase

I am participating in the Forge Accelerator in Barcelona this week. Let me mention some pending Revit API issues before diving into any accelerator topics – AddMaterials enhancements – Retrieving element rotation – Changing the phase created parameter... Read more →

SketchIt, Lookup Family Types, Definition Names

Today, we present yet another RevitLookup enhancement, a note on an undocumented built-in parameter change and a neat Forge Design Automation for Revit sample app – RevitLookup family types and parameter definition names – Bitmap aspect ratio built-in parameter renamed – DA4R SketchIt demo generates walls... Read more →

DirectShape Element to Represent Room Volume

Yesterday, I implemented a new add-in, RoomVolumeDirectShape, that creates DirectShape elements representing the volumes of all the rooms – Request to display room volumes in Forge SVF file – RoomVolumeDirectShape functionality – Retrieving all element properties – Converting a .NET dictionary to JSON – Generating DirectShape from ClosedShell – Complete external command class Execute method – Sample model and results – Challenges encountered underway – Cherry BIM Services – On the value of the "Loss Method" property – AI-generated talking head models... Read more →

Batch Processing and Aspects of AsStringValue

I avoid answering non-confidential questions in private, as I tell everyone who tries to do so. However, some non-confidential queries still come in via ADN. Here are two that came in today that might be of general interest and therefore seem worth sharing – Batch processing Revit families and documents – AsString and AsValueString results differ... Read more →

Set Floor Level and Use IPC for Disentanglement

Today, yet another introduction to Forge, a simple issue of setting the level of a floor element, and the much more complex one of gaining freedom and total independence via IPC – What is Forge? – Changing the level of a floor – Entanglement can be hell – CefSharp entanglement – Disentanglement and independence via IPC – Beer-ware license... Read more →

Slow, Slower Still and Faster Filtering

Today I discuss (once again) an important performance aspect of Revit element filtering, a Python script for tagging JPEG images with EXIF data, prompted by a recent ski tour, and three other interesting topics that caught my eye – Slow, slower still and faster filtering – Python JPEG EXIT filename tagging – TED talks and population growth – Objective reality does not exist – Artificial intelligence judge... Read more →

Binding a Shared Parameter to Revision

Here is a recurring question on binding a shared parameter to a given category – How to add a shared parameter to revision? – Determine the category – Binding to the category – Implementation sample... Read more →

Accessing Dimension Line Weight

Today we share a quickie from the Revit API discussion forum thread on how to access the line weight for dimension lines – I want to programmatically access a dimension line's line weight... Read more →

Efficient and Elegant Code

I remain busy, mainly in the Revit API discussion forum. Here are three recent samples dealing with pretty generic questions – Efficiency and elegance in simple code – Pushing wall type to doors... Read more →

Floor Area Above Room and Mysterious Hide

Today, we focus on two pure programming questions from the Revit API discussion forum – Area of an exterior floor above a room – Mysterious element hiding activity... Read more →

Colleagues Deleting Non-Shared Project Parameter

Some happy news about two new Revit API supporter colleagues, Naveen Kumar and Zhong Wu. They already reached second and third place in the list of top solution providers. Here is also a very relevant recent case handled by Zhong – Top solution authors – Naveen on Naveen – Zhong shifts to AEC – Zhong on Zhong – Deleting a non-shared project parameter... Read more →

Revit 2019.1, CEFSharp, Forge Accelerator in Rome

I am back from a multi-day hike of about 70 km along the Swedish Sörmlandsleden wilderness trail. In the meantime, lots of noteworthy things happened – Revit 2019.1 update and features – Revit Add-Ins using the CEFsharp library – BIM 360 Issues API – Forge Accelerator in Rome and elsewhere – Looking for a Forge development partner – New way to retrieve a parameter id... Read more →

Wall Profile Command Update

I returned from my time off in July. I dived in deep into the Revit API again to resolve an issue retrieving wall profile curves. Here are some other noteworthy items to keep company with my debugging report – CmdWallProfile update – Access to the IUpdater original value – Getting element dimensions from IFC files – Creative workaround to rotate elevation marker in chunks... Read more →

Forge Tutorials and Filtering for a Parameter Value

Today, let's revisit the topic of filtering for a parameter value, and mention the updated Forge tutorials – Learning Forge tutorials – Filtering for a specific parameter value – Filtered element collector optimisation... Read more →

Getting All Parameter Values

How to export all the Revit data to an external database? It is very simple to extract all the parameter data. Let's implement a solution to do so – Existing sample implementations – Black box input – Choices for the output and its structure – Retrieve parameter values from an element – FilterCategoryRule versus category filters – Category description extension method – Retrieve parameter data for all elements of given categories – External command Execute mainline – Sample run results – Download... Read more →

Foreground Image Import and Visible DWG Geometry

Today, we explore how to retrieve visible DWG geometry, i.e., geometry elements contained in a CAD import instance on a layer that is visible in the currently active view, and how to import an image to the foreground instead of the default background setting – Retrieve CAD import geometry on visible layer – Import image using foreground option... Read more →

Parameters, Walls and Driving Revit via WCF Service

Exciting news from Russia and some mundane updates on other repetitive topics – Driving Revit from a modeless context via a WCF service – Room walls' directions – Retrieving all exterior walls – Getting and setting a shared parameter value... Read more →

Revit 2018.3, SetValueString and External Events

I installed the latest Revit update, and want to highlight two of the numerous interesting ongoing Revit API forum discussions – Revit 2018.3 update – Avoid SetValueString – Passing Data via ExternalEvent.Raise... Read more →

DevDays, Keynote Manager and REX Extensions

Let's highlight a few recent threads from the Revit API discussion forum. Before getting to those, a quick pointer to the DevDays Online recording from last week – DevDays online presentations on Revit API updates – External command with ribbon button sample – RevitAddinKeyNoteSystem keynote manager – REX extensions versus Revit add-ins – Reloading Revit links from user selected folder – Converting all parameter values to metric... Read more →

Autodesk University Past and Future

Quick notes on the best speakers at the last event in Las Vegas, and your chance to become one of them at the next in London – Best AU Speakers in Las Vegas 2017 – CFP for Autodesk University London 2018... Read more →

Setting Parameter Varies Between Groups

Looking at setting the SetAllowVaryBetweenGroups flag on a shared parameter; is there any way to set can vary by group instance (what I need) the default for API-created bindings? ... Read more →

Automatic Wall Creation

Alexander Ignatovich shares an exceedingly elegant solution for automatic wall creation, illustrating a number of important concepts and implementing the following functionality very succinctly indeed – Retrieve all the cube family instances – Retrieve their height parameter value – Retrieve their solids making use of the .NET yield operator – Extract their horizontal outline contours using an ExtrusionAnalyzer – Create walls along each contour curve segment – Place a door family instance at the midpoint of each wall... 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 →

Use Forge or Spreadsheet to Create Shared Parameters

I spent last week working on a new little BIM sample showing a round trip connection between Revit and Forge, and an automated way of generating and populating shared parameters from spreadsheet data – RvtMetaProp – Revit meta property add-in – CSV and JSON input file format – Forge configurator sample – Round-Trip Forge meta property editor – BipGroupList lists built-in parameter group enums and labels – Two options to add custom properties to the Revit BIM – Translation of shared parameters to Forge – Handling BIM floors in Forge... Read more →

Unit Abbreviations

Håvard Dagsvik of Symetri implemented code to automatically generate a dictionary mapping the Revit DisplayUnitType to corresponding UnitSymbolType display strings. The developer guide describes these classes like this – UnitType – type of physical quantity to be measured, for example length or force (UT_Length or UT_Force) – DisplayUnitType – units and display format used to format numbers as strings or convert units (i.e. DUT_METERS) – UnitSymbolType – unit symbol displayed in the formatted string representation of a number to indicate the units of the value (i.e. UST_M)... Read more →

Forge, Installed Version, Move Group, Name Filter

A biggish post rather late in the week... still answering too many cases – Forge for AEC demos and sample code – Determining the starting view – Detecting installed Revit version – Detecting installed C3D version – Moving items inside a detail group – Filtering for family instances and types by family name... Read more →

Finding an Exit Path and ElementId Parameter Values

As usual, lots of exciting discussions are being conducted in the Revit API discussion forum. I'll just highlight two of them going on right now – Finding a path through the BIM – Finding all possible ElementId values for specific Parameter... Read more →

Work Half, AKS Opener, RvtFader and ForgeFader

I completed a first revision of the ForgeFader project, bringing it up to par with RvtFader. It is pretty cool seeing the same functionality implemented in two such different ways, on completely different platforms, using different tools. Alan Seidel shared another exciting Revit add-in. First and not least, another exciting topic for me personally is switching to half-time work – Work half – AKS Opener – Video – GitHub repository – Why? – Specific interest – RvtFader – ForgeFader... 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 →