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;
}
///// <summary>
///// Allow selection of curve elements only.
///// </summary>
//class CurveElementSelectionFilter : ISelectionFilter
//{
// public bool AllowElement( Element e )
// {
// return e is CurveElement;
// }
// public bool AllowReference( Reference r, XYZ p )
// {
// return true;
// }
//}
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 all model curves in the entire model.
List<CurveElement> curves = new List<CurveElement>(
new FilteredElementCollector( doc )
.OfClass( typeof( CurveElement ) )
.ToElements()
.Cast<CurveElement>() );
int n = curves.Count;
// If there are less than two,
// there is nothing we can do.
if( 2 > n )
{
message = _prompt;
return Result.Failed;
}
// If there are exactly two, pick those.
if( 2 < n )
{
// Else, check for a pre-selection.
curves.Clear();
Selection sel = uidoc.Selection;
ICollection<ElementId> ids = sel.GetElementIds();
n = ids.Count;
Debug.Print( "{0} pre-selected elements.",
n );
// If two or more model curves were pre-
// selected, use the first two encountered.
if( 1 < n )
{
foreach( ElementId id in ids )
{
CurveElement c = doc.GetElement( id )
as CurveElement;
if( null != c )
{
curves.Add( c );
if( 2 == curves.Count )
{
Debug.Print( "Found two model curves, "
+ "ignoring everything else." );
break;
}
}
}
}
// Else, prompt for an
// interactive post-selection.
if( 2 != curves.Count )
{
curves.Clear();
ISelectionFilter f
= new JtElementsOfClassSelectionFilter<CurveElement>();
try
{
Reference r = sel.PickObject(
ObjectType.Element, f,
"Please pick first model curve." );
curves.Add( doc.GetElement( r.ElementId )
as CurveElement );
}
catch( Autodesk.Revit.Exceptions
.OperationCanceledException )
{
return Result.Cancelled;
}
try
{
Reference r = sel.PickObject(
ObjectType.Element, f,
"Please pick second model curve." );
curves.Add( doc.GetElement( r.ElementId )
as CurveElement );
}
catch( Autodesk.Revit.Exceptions
.OperationCanceledException )
{
return Result.Cancelled;
}
}
}
// Extract data from the two selected curves.
Curve c0 = curves[0].GeometryCurve;
Curve c1 = curves[1].GeometryCurve;
double sp0 = c0.GetEndParameter( 0 );
double ep0 = c0.GetEndParameter( 1 );
double step0 = ( ep0 - sp0 ) / _nSegments;
double sp1 = c1.GetEndParameter( 0 );
double ep1 = c1.GetEndParameter( 1 );
double step1 = ( ep1 - sp1 ) / _nSegments;
Debug.Print( "Two curves' step size [start, end]:"
+ " {0} [{1},{2}] -- {3} [{4},{5}]",
Util.RealString( step0 ),
Util.RealString( sp0 ),
Util.RealString( ep0 ),
Util.RealString( step1 ),
Util.RealString( sp1 ),
Util.RealString( ep1 ) );
// Modify document within a transaction.
using( Transaction tx = new Transaction( doc ) )
{
Creator creator = new Creator( doc );
tx.Start( "MidCurve" );
// Current segment start points.
double t0 = sp0;
double t1 = sp1;
XYZ p0 = c0.GetEndPoint( 0 );
XYZ p1 = c1.GetEndPoint( 0 );
XYZ p = Util.Midpoint( p0, p1 );
Debug.Assert(
p0.IsAlmostEqualTo( c0.Evaluate( t0, false ) ),
"expected equal start points" );
Debug.Assert(
p1.IsAlmostEqualTo( c1.Evaluate( t1, false ) ),
"expected equal start points" );
// Current segment end points.
t0 += step0;
t1 += step1;
XYZ q0, q1, q;
Line line;
for( int i = 0; i < _nSegments; ++i, t0 += step0, t1 += step1 )
{
q0 = c0.Evaluate( t0, false );
q1 = c1.Evaluate( t1, false );
q = Util.Midpoint( q0, q1 );
Debug.Print(
"{0} {1} {2} {3}-{4} {5}-{6} {7}-{8}",
i,
Util.RealString( t0 ),
Util.RealString( t1 ),
Util.PointString( p0 ),
Util.PointString( q0 ),
Util.PointString( p1 ),
Util.PointString( q1 ),
Util.PointString( p ),
Util.PointString( q ) );
// Create approximating curve segment.
line = Line.CreateBound( p, q );
creator.CreateModelCurve( line );
p0 = q0;
p1 = q1;
p = q;
}
tx.Commit();
}
return Result.Succeeded;
}
