public override Value Evaluate(FSharpList <Value> args)
{
Reference faceRef = (args[1] as Value.Container).Item as Reference;
Autodesk.Revit.DB.Face f = (faceRef == null) ?
((args[1] as Value.Container).Item as Autodesk.Revit.DB.Face) :
dynRevitSettings.Doc.Document.GetElement(faceRef).GetGeometryObjectFromReference(faceRef) as Autodesk.Revit.DB.Face;
XYZ norm = null;
if (f != null)
{
//each item in the list will be a reference point
UV uv = (UV)(args[0] as Value.Container).Item;
norm = f.ComputeNormal(uv);
}
return(Value.NewContainer(norm));
}
/// <summary>
/// Returns a vector represnting the normal of an analysis surface. Useful for sorting/grouping surfaces upstream of a SetSurfaceParameters node.
/// </summary>
/// <param name="SurfaceId">The ElementId of the surface to create a vector from. Get this from AnalysisZones > CreateFrom* > SurfaceIds output list</param>
/// <returns></returns>
public static Autodesk.DesignScript.Geometry.Vector AnalysisSurfaceVector(ElementId SurfaceId)
{
//local varaibles
Document RvtDoc = DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument.Document;
MassSurfaceData surf = null;
Autodesk.Revit.DB.ElementId myEnergyModelId = null;
//try to get the MassSurfaceData object from the document
try
{
surf = (MassSurfaceData)RvtDoc.GetElement(new Autodesk.Revit.DB.ElementId(SurfaceId.InternalId));
if (surf == null)
{
throw new Exception();
}
}
catch (Exception)
{
throw new Exception("Couldn't find a MassSurfaceData object with Id #: " + SurfaceId.ToString());
}
//try to get the element id of the MassEnergyAnalyticalModel - we need this to pull faces from
try
{
myEnergyModelId = surf.ReferenceElementId;
if (myEnergyModelId == null)
{
throw new Exception();
}
}
catch (Exception)
{
throw new Exception("Couldn't find a MassEnergyAnalyticalModel object belonging to the Mass instance with Id #: " + surf.ReferenceElementId.ToString());
}
//try to get the MassSurfaceData object from the document
try
{
surf = (MassSurfaceData)RvtDoc.GetElement(new Autodesk.Revit.DB.ElementId(SurfaceId.InternalId));
if (surf == null)
{
throw new Exception();
}
}
catch (Exception)
{
throw new Exception("Couldn't find a MassSurfaceData object with Id #: " + SurfaceId.ToString());
}
//get the smallest face
Autodesk.Revit.DB.Face bigFace = GetLargestFace(RvtDoc, surf, myEnergyModelId);
// Find the face normal at the center of the face
BoundingBoxUV bbox = bigFace.GetBoundingBox();
// center of the face in the UV of the face
Autodesk.Revit.DB.UV center = new Autodesk.Revit.DB.UV((bbox.Max.U - bbox.Min.U) / 2 + bbox.Min.U, (bbox.Max.V - bbox.Min.V) / 2 + bbox.Min.V);
XYZ faceNormal = bigFace.ComputeNormal(center);
XYZ normal = faceNormal.Normalize();
return(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(normal.X, normal.Y, normal.Z, true));
}