Back in December 2013, I discussed structural cross section analysis, i.e. determination of the cross section profile of beam, columns, braces, etc., and several completely different approaches one can take to achieve that.
I also demonstrated how to make use of the powerful functionality provided by the REX toolkit without building the entire add-in on top of the REX framework.
By the way, here are some other earlier discussions of REX:
Before getting to this Revit Structure stuff, let me also mention that I made one of my rather infrequent contributions to the AEC DevBlog today as well, to explain that about using AutoCAD MEP object enablers in AcCoreConsole.
Anyway, back to the cross section analysis; that discussion led to the following question:
Question: I would like to create a Revit 2015 REX add-in without using the REX add-in wizard.
I looked at your FramingXsecAnalyzer add-in and the post describing it, but don't understand how to start and create a new such project for my own use.
Do you have any sample project I could start with?
Answer: The starting point is a completely normal Revit add-in project.
You add the required additional references to that and ensure that the REX framework is found and loaded dynamically.
To migrate the application to a new version, you can start by looking at the 2012 and 2014 versions in the download section of that post.
You can use the GitHub comparison tools to determine what changed between them, e.g. FramingXsecAnalyzer/compare/2012.0.0.0...2014.0.0.0.
I migrated the project to Revit 2015 for you.
One important step was obviously to increment the version number in the assembly resolver.
At the beginning of the external command Execute method, we register it like this:
AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler( OnAssemblyResolve );
The resolver specifies the assembly version to load:
static System.Reflection.Assembly OnAssemblyResolve( object sender, ResolveEventArgs args ) { Assembly a = Assembly.GetExecutingAssembly(); return Autodesk.REX.Framework.REXAssemblies .Resolve( sender, args, "2015", a ); }
The code actually making use of the REX functionality remains completely unchanged:
/// <summary> /// Use REX to analyse element cross section. /// This requires a reference to /// REX.ContentGeneratorLT.dll and prior /// initialisation of the REX framework. /// The converter initialisation must reside in /// a different method than the subscription to /// the assembly resolver OnAssemblyResolve. /// </summary> void RexXsecAnalyis( ExternalCommandData commandData, Element e ) { // Initialise converter RVTFamilyConverter rvt = new RVTFamilyConverter( commandData, true ); // Retrieve family type REXFamilyType fam = rvt.GetFamily( e, ECategoryType.SECTION_PARAM ); // Retrieve section data REXFamilyType_ParamSection paramSection = fam as REXFamilyType_ParamSection; REXSectionParamDescription parameters = paramSection.Parameters; // Extract dimensions, section type, tapered // predicate, etc. // If different start and end sections are // required, use DimensionsEnd as well. REXSectionParamDimensions dimensions = parameters .Dimensions; ESectionType sectionType = parameters .SectionType; bool tapered = parameters.Tapered; bool start = true; Contour_Section contour = parameters.GetContour( start ); List<ContourCont> shape = contour.Shape; Util.InfoMessage( string.Format( "The selected structural framing element " + "cross section REX section type is " + "{0}.", sectionType ) ); }
As always, the current version is available from the FramingXsecAnalyzer GitHub repository, and the version discussed here is release 2015.0.0.0.
This kind of interactive parameter selection and filtering may obviously be very useful for many other applications as well.
I tested it on the following I column:
It reports:
The selected structural framing element cross section section view cut plane face has 1 loop and is thus 'open'. The selected structural framing element cross section REX section type is I.
The REX modules are demand loaded between these two log messages.
Looking in the Visual Studio debug output window, you can see the following activity going on in the background:
'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Autodesk.REX.Framework\v4.0_2014.0.0.0__51e16e3b26b42eda\Autodesk.REX.Framework.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\assembly\GAC_MSIL\Autodesk.Common.AResourcesControl\1.0.0.0__ff3304d4f320ee59\Autodesk.Common.AResourcesControl.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Components\AREXContentGenerator\REX.ContentGeneratorLT.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Autodesk.REX.Framework\v4.0_2015.0.0.0__51e16e3b26b42eda\Autodesk.REX.Framework.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Foundation\REX.Foundation.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Foundation\REX.Foundation.Forms.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Products\Revit\AREXRevitMngr.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Foundation\REX.Geometry.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.Engine.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.Preferences.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.System.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.UI.WPF.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.UI.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.UI.Forms.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\en-US\REX.UI.resources.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\en-US\REX.System.resources.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.Mathematics.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Foundation\REX.Geometry.Structure.dll' 'Revit.exe' (Managed (v4.0.30319)): Loaded 'C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Foundation\REX.Geometry.Revit.dll'
Copy to a text editor or view the source to see the truncated lines in full.
Here is a list of the modules that were loaded:
- C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Autodesk.REX.Framework\v4.0_2014.0.0.0__51e16e3b26b42eda\Autodesk.REX.Framework.dll
- C:\Windows\assembly\GAC_MSIL\Autodesk.Common.AResourcesControl\1.0.0.0__ff3304d4f320ee59\Autodesk.Common.AResourcesControl.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Components\AREXContentGenerator\REX.ContentGeneratorLT.dll
- C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Autodesk.REX.Framework\v4.0_2015.0.0.0__51e16e3b26b42eda\Autodesk.REX.Framework.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Foundation\REX.Foundation.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Foundation\REX.Foundation.Forms.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Products\Revit\AREXRevitMngr.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Foundation\REX.Geometry.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.Engine.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.Preferences.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.System.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.UI.WPF.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.UI.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.UI.Forms.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\en-US\REX.UI.resources.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\en-US\REX.System.resources.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Engine\REX.Mathematics.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Foundation\REX.Geometry.Structure.dll
- C:\Program Files\Common Files\Autodesk Shared\Extensions 2015\Framework\Foundation\REX.Geometry.Revit.dll
In a second test, I presented it with a tubular column:
In this case, it reports:
The selected structural framing element cross section section view cut plane face has 2 loops and is thus 'closed'. The selected structural framing element cross section REX section type is TUBE.
I hope this helps.
Have fun!
