public Result Execute(
ExternalCommandData commandData,
ref string message,
ElementSet elements)
{
UIApplication uiapp = commandData.Application;
UIDocument uidoc = uiapp.ActiveUIDocument;
Application app = uiapp.Application;
Document doc = uidoc.Document;
// Select two walls and the dimension line point:
Selection sel = uidoc.Selection;
ReferenceArray refs = new ReferenceArray();
try
{
ISelectionFilter f
= new JtElementsOfClassSelectionFilter<Wall>();
refs.Append( sel.PickObject(
ObjectType.Element, f,
"Please select first wall" ) );
refs.Append( sel.PickObject(
ObjectType.Element, f,
"Please pick dimension line "
+ "point on second wall" ) );
//rFace = sel.PickObject( ObjectType.Face,
// "Please select face on second wall at dimension line point" );
//
//rPoint = sel.PickObject( ObjectType.PointOnElement,
// "Please select point on first wall" );
}
catch( Autodesk.Revit.Exceptions.OperationCanceledException )
{
message = "No two walls selected";
return Result.Failed;
}
// Ensure the two selected walls are straight and
// parallel; determine their mutual normal vector
// and a point on each wall for distance
// calculations:
Wall[] walls = new Wall[2];
List<int> ids = new List<int>( 2 );
XYZ[] pts = new XYZ[2];
Line[] lines = new Line[2];
IntersectionResult ir;
XYZ normal = null;
int i = 0;
foreach( Reference r in refs )
{
// 'Autodesk.Revit.DB.Reference.Element' is
// obsolete: Property will be removed. Use
// Document.GetElement(Reference) instead.
//Wall wall = r.Element as Wall; // 2011
Wall wall = doc.GetElement( r ) as Wall; // 2012
walls[i] = wall;
ids.Add( wall.Id.IntegerValue );
// Obtain location curve and
// check that it is straight:
LocationCurve lc = wall.Location
as LocationCurve;
Curve curve = lc.Curve;
lines[i] = curve as Line;
if( null == lines[i] )
{
message = _prompt;
return Result.Failed;
}
// Obtain normal vectors
// and ensure that they are equal,
// i.e. walls are parallel:
if( null == normal )
{
normal = Util.Normal( lines[i] );
}
else
{
if( !Util.IsParallel( normal,
Util.Normal( lines[i] ) ) )
{
message = _prompt;
return Result.Failed;
}
}
// Obtain pick points and project
// onto wall location lines:
XYZ p = r.GlobalPoint;
ir = lines[i].Project( p );
if( null == ir )
{
message = string.Format(
"Unable to project pick point {0} "
+ "onto wall location line.",
i );
return Result.Failed;
}
pts[i] = ir.XYZPoint;
Debug.Print(
"Wall {0} id {1} at {2}, {3} --> point {4}",
i, wall.Id.IntegerValue,
Util.PointString( lines[i].GetEndPoint( 0 ) ),
Util.PointString( lines[i].GetEndPoint( 1 ) ),
Util.PointString( pts[i] ) );
if( 0 < i )
{
// Project dimension point selected on second wall
// back onto first wall, and ensure that normal
// points from second wall to first:
ir = lines[0].Project( pts[1] );
if( null == ir )
{
message = string.Format(
"Unable to project selected dimension "
+ "line point {0} on second wall onto "
+ "first wall's location line.",
Util.PointString( pts[1] ) );
return Result.Failed;
}
pts[0] = ir.XYZPoint;
}
++i;
}
XYZ v = pts[0] - pts[1];
if( 0 > v.DotProduct( normal ) )
{
normal = -normal;
}
// Shoot a ray back from the second
// picked wall towards first:
Debug.Print(
"Shooting ray from {0} in direction {1}",
Util.PointString( pts[1] ),
Util.PointString( normal ) );
View3D view = Get3DView( doc );
if( null == view )
{
message = "No 3D view named '{3D}' found; "
+ "run the View > 3D View command once "
+ "to generate it.";
return Result.Failed;
}
//refs = doc.FindReferencesByDirection(
// pts[1], normal, view ); // 2011
//IList<ReferenceWithContext> refs2
// = doc.FindReferencesWithContextByDirection(
// pts[1], normal, view ); // 2012
// In the Revit 2014 API, the call to
// FindReferencesWithContextByDirection causes a
// warning saying:
// "FindReferencesWithContextByDirection is obsolete:
// This method is deprecated in Revit 2014.
// Use the ReferenceIntersector class instead."
ReferenceIntersector ri
= new ReferenceIntersector(
walls[0].Id, FindReferenceTarget.Element, view );
ReferenceWithContext ref2
= ri.FindNearest( pts[1], normal );
if( null == ref2 )
{
message = "ReferenceIntersector.FindNearest"
+ " returned null!";
return Result.Failed;
}
#region Obsolete code to determine the closest reference
#if NEED_TO_DETERMINE_CLOSEST_REFERENCE
// Store the references to the wall surfaces:
Reference[] surfrefs = new Reference[2] {
null, null };
// Find the two closest intersection
// points on each of the two walls:
double[] minDistance = new double[2] {
double.MaxValue,
double.MaxValue };
//foreach( Reference r in refs )
foreach( ReferenceWithContext rc in refs2 )
{
// 'Autodesk.Revit.DB.Reference.Element' is
// obsolete: Property will be removed. Use
// Document.GetElement(Reference) instead.
//Element e = r.Element; // 2011
Reference r = rc.GetReference();
Element e = doc.GetElement( r ); // 2012
if( e is Wall )
{
i = ids.IndexOf( e.Id.IntegerValue );
if( -1 < i
&& ElementReferenceType.REFERENCE_TYPE_SURFACE
== r.ElementReferenceType )
{
//GeometryObject g = r.GeometryObject; // 2011
GeometryObject g = e.GetGeometryObjectFromReference( r ); // 2012
if( g is PlanarFace )
{
PlanarFace face = g as PlanarFace;
Line line = ( e.Location as LocationCurve )
.Curve as Line;
Debug.Print(
"Wall {0} at {1}, {2} surface {3} "
+ "normal {4} proximity {5}",
e.Id.IntegerValue,
Util.PointString( line.GetEndPoint( 0 ) ),
Util.PointString( line.GetEndPoint( 1 ) ),
Util.PointString( face.Origin ),
Util.PointString( face.Normal ),
rc.Proximity );
// First reference: assert it is a face on this wall
// and the distance is half the wall thickness.
// Second reference: the first reference on the other
// wall; assert the distance between the two references
// equals the distance between the wall location lines
// minus half of the sum of the two wall thicknesses.
if( rc.Proximity < minDistance[i] )
{
surfrefs[i] = r;
minDistance[i] = rc.Proximity;
}
}
}
}
}
if( null == surfrefs[0] )
{
message = "No suitable face intersection "
+ "points found on first wall.";
return Result.Failed;
}
if( null == surfrefs[1] )
{
message = "No suitable face intersection "
+ "points found on second wall.";
return Result.Failed;
}
CmdDimensionWallsIterateFaces
.CreateDimensionElement( doc.ActiveView,
pts[0], surfrefs[0], pts[1], surfrefs[1] );
#endif // NEED_TO_DETERMINE_CLOSEST_REFERENCE
#endregion // Obsolete code to determine the closest reference
CmdDimensionWallsIterateFaces
.CreateDimensionElement( doc.ActiveView,
pts[0], ref2.GetReference(), pts[1], refs.get_Item( 1 ) );
return Result.Succeeded;
}
