topic Re: Energy Analysis - BuildingElement in Revit API Forum

Energy Analysis - BuildingElement

Anonymous — Fri, 07 Apr 2017 16:04:55 GMT

Hey all,

It looks like a bug in the Revit API, I'm trying to get analytical surfaces using building elements instead of spatial elements and it doesn't matter the configuration I'm using in the classes EnergyAnalysisDetailModel / EnergyDataSettings it always returns with no information there as you can see on the image bellow, if someone has any idea what's going on there please let me know. Thanks.

Re: Energy Analysis - BuildingElement

IbrahimNaeem — Fri, 07 Apr 2017 17:08:32 GMT

We get such result when we don't cast the parameter in the correct way. so try casting it back in a different way, may be you can extract points or curves out of it. or share a snap shot of the code so we can try to solve.

Thanks, Ibrahim Naeem

Re: Energy Analysis - BuildingElement

Anonymous — Fri, 07 Apr 2017 19:26:42 GMT

Honestly, I've already tried it in every single way possible and I'm still getting the same results. I got it working using alternative ways to extract the geometry and intersection classes to get where these analytical results are coming from, but I'd like to use the class EnergyAnalysisSurface and its properties because the information should be already there and increase my application's performance.

using (Transaction t = new Transaction(doc, "Create Energy Analysis"))
{
	try
	{
		t.Start();
		EnergyDataSettings energySettings = EnergyDataSettings.GetFromDocument(doc);
		energySettings.AnalysisType = AnalysisMode.ConceptualMassesAndBuildingElements;

		// Collect space and surface data from the building's analytical thermal model
		EnergyAnalysisDetailModelOptions options = new EnergyAnalysisDetailModelOptions();
		options.Tier = EnergyAnalysisDetailModelTier.Final; // include constructions, schedules, and non-graphical data in the computation of the energy analysis model
		options.EnergyModelType = EnergyModelType.BuildingElement;   // Energy model based on rooms or spaces

		EnergyAnalysisDetailModel eadm = EnergyAnalysisDetailModel.Create(doc, options); // Create a new energy analysis detailed model from the physical model
		IList<EnergyAnalysisSpace> spaces = eadm.GetAnalyticalSpaces();
		StringBuilder builder = new StringBuilder();
		builder.AppendLine("Spaces: " + spaces.Count);
		foreach (EnergyAnalysisSpace space in spaces)
		{
			SpatialElement spatialElement = doc.GetElement(space.CADObjectUniqueId) as SpatialElement;
			ElementId spatialElementId = spatialElement == null ? ElementId.InvalidElementId : spatialElement.Id;
			builder.AppendLine("   >>> " + space.SpaceName + " related to " + spatialElementId);
			IList<EnergyAnalysisSurface> surfaces = space.GetAnalyticalSurfaces();
			builder.AppendLine("       has " + surfaces.Count + " surfaces.");
			foreach (EnergyAnalysisSurface surface in surfaces)
			{
				builder.AppendLine("+++ Surface from " + surface.OriginatingElementDescription);
			}
		}
		TaskDialog.Show("EAM", builder.ToString());

		t.Commit();
	}
	catch (Autodesk.Revit.Exceptions.ArgumentException ex)
	{
		logger.Error("Error refreshing: ", ex);
		t.RollBack();
	}
}

Re: Energy Analysis - BuildingElement

Anonymous — Sat, 28 Dec 2019 14:46:22 GMT

Hi,

I see your question has been unanswered since then, I have the same problem with Revit 2019 and 2020. Have you managed to find a way to access to the EnergyAnalysisSurface property? I am looking for the CadObjectUniqueId one.

Best regards,

Samir