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CreateFromCurves Method

Creates a new instance of a shape driven Rebar element within the project.

Namespace: Autodesk.Revit.DB.Structure
Assembly: RevitAPI (in RevitAPI.dll) Version: 18.0.0.0 (18.0.0.420)
Since: 2009

Syntax

C# 
public static Rebar CreateFromCurves(
	Document doc,
	RebarStyle style,
	RebarBarType barType,
	RebarHookType startHook,
	RebarHookType endHook,
	Element host,
	XYZ norm,
	IList<Curve> curves,
	RebarHookOrientation startHookOrient,
	RebarHookOrientation endHookOrient,
	bool useExistingShapeIfPossible,
	bool createNewShape
)
Visual Basic 
Public Shared Function CreateFromCurves ( _
	doc As Document, _
	style As RebarStyle, _
	barType As RebarBarType, _
	startHook As RebarHookType, _
	endHook As RebarHookType, _
	host As Element, _
	norm As XYZ, _
	curves As IList(Of Curve), _
	startHookOrient As RebarHookOrientation, _
	endHookOrient As RebarHookOrientation, _
	useExistingShapeIfPossible As Boolean, _
	createNewShape As Boolean _
) As Rebar
Visual C++ 
public:
static Rebar^ CreateFromCurves(
	Document^ doc, 
	RebarStyle style, 
	RebarBarType^ barType, 
	RebarHookType^ startHook, 
	RebarHookType^ endHook, 
	Element^ host, 
	XYZ^ norm, 
	IList<Curve^>^ curves, 
	RebarHookOrientation startHookOrient, 
	RebarHookOrientation endHookOrient, 
	bool useExistingShapeIfPossible, 
	bool createNewShape
)

Parameters

doc
Type: Autodesk.Revit.DB Document
A document.
style
Type: Autodesk.Revit.DB.Structure RebarStyle
The usage of the bar, "standard" or "stirrup/tie".
barType
Type: Autodesk.Revit.DB.Structure RebarBarType
A RebarBarType element that defines bar diameter, bend radius and material of the rebar.
startHook
Type: Autodesk.Revit.DB.Structure RebarHookType
A RebarHookType element that defines the hook for the start of the bar. If this parameter is a null reference ( Nothing in Visual Basic) , it means to create a rebar with no hook.
endHook
Type: Autodesk.Revit.DB.Structure RebarHookType
A RebarHookType element that defines the hook for the end of the bar. If this parameter is a null reference ( Nothing in Visual Basic) , it means to create a rebar with no hook.
host
Type: Autodesk.Revit.DB Element
The element to which the rebar belongs. The element must support rebar hosting; see Autodesk.Revit.DB.Structure.RebarHostData.
norm
Type: Autodesk.Revit.DB XYZ
The normal to the plane that the rebar curves lie on.
curves
Type: System.Collections.Generic IList Curve
An array of curves that define the shape of the rebar curves. They must belong to the plane defined by the normal and origin. Bends and hooks should not be included in the array of curves.
startHookOrient
Type: Autodesk.Revit.DB.Structure RebarHookOrientation
Defines the orientation of the hook plane at the start of the rebar with respect to the orientation of the first curve and the plane normal. Only two values are permitted: Value = Right: The hook is on your right as you stand at the end of the bar, with the bar behind you, taking the bar's normal as "up." Value = Left: The hook is on your left as you stand at the end of the bar, with the bar behind you, taking the bar's normal as "up."
endHookOrient
Type: Autodesk.Revit.DB.Structure RebarHookOrientation
Defines the orientation of the hook plane at the end of the rebar with respect to the orientation of the last curve and the plane normal. Only two values are permitted: Value = Right: The hook is on your right as you stand at the end of the bar, with the bar behind you, taking the bar's normal as "up." Value = Left: The hook is on your left as you stand at the end of the bar, with the bar behind you, taking the bar's normal as "up."
useExistingShapeIfPossible
Type: System Boolean
Attempts to assign a RebarShape from those existing in the document. If no shape matches, NewRebar returns or creates a new shape, according to the parameter createNewShape. When both parameters are "true", the behavior is the same as sketching rebar in the UI. At least one of these parameters must be "true". If the RebarShapeDefinesHooks flag in ReinforcementSettings has been set to false, and a RebarShape cannot be found with both matching curves and hooks, then this method will perform a second search, ignoring hook information.
createNewShape
Type: System Boolean
Creates a shape in the document to match the curves, hooks, and style specified, and assigns it to the new rebar instance. Shape creation will not succeed unless one or more other shapes already exist in the document, and these shapes have enough shape parameters to define a shape for these curves.

Return Value

The newly created Rebar instance, or a null reference ( Nothing in Visual Basic) if the operation fails.

Examples

Copy C# 
Rebar CreateRebar(Autodesk.Revit.DB.Document document, FamilyInstance column, RebarBarType barType, RebarHookType hookType)
{
    // Define the rebar geometry information - Line rebar
    LocationPoint location = column.Location as LocationPoint;
    XYZ origin = location.Point;
    XYZ normal = new XYZ(1, 0, 0);
    // create rebar 9' long
    XYZ rebarLineEnd = new XYZ(origin.X, origin.Y, origin.Z + 9);
    Line rebarLine = Line.CreateBound(origin, rebarLineEnd);

    // Create the line rebar
    IList<Curve> curves = new List<Curve>();
    curves.Add(rebarLine);

    Rebar rebar = Rebar.CreateFromCurves(document, Autodesk.Revit.DB.Structure.RebarStyle.Standard, barType, hookType, hookType,
                        column, origin, curves, RebarHookOrientation.Right, RebarHookOrientation.Left, true, true);

    if (null != rebar)
    {
        // set specific layout for new rebar as fixed number, with 10 bars, distribution path length of 1.5'
        // with bars of the bar set on the same side of the rebar plane as indicated by normal
        // and both first and last bar in the set are shown
        rebar.GetShapeDrivenAccessor().SetLayoutAsFixedNumber(10, 1.5, true, true, true);
    }

    return rebar;
}
Copy VB.NET 
Private Function CreateRebar(document As Autodesk.Revit.DB.Document, column As FamilyInstance, barType As RebarBarType, hookType As RebarHookType) As Rebar
    ' Define the rebar geometry information - Line rebar
    Dim location As LocationPoint = TryCast(column.Location, LocationPoint)
    Dim origin As XYZ = location.Point
    Dim normal As New XYZ(1, 0, 0)
    ' create rebar 9' long
    Dim rebarLineEnd As New XYZ(origin.X, origin.Y, origin.Z + 9)
    Dim rebarLine As Line = Line.CreateBound(origin, rebarLineEnd)

    ' Create the line rebar
    Dim curves As IList(Of Curve) = New List(Of Curve)()
    curves.Add(rebarLine)

    Dim rebar__1 As Rebar = Rebar.CreateFromCurves(document, Autodesk.Revit.DB.[Structure].RebarStyle.Standard, barType, hookType, hookType, column, _
        origin, curves, RebarHookOrientation.Right, RebarHookOrientation.Left, True, True)

    If rebar__1 IsNot Nothing Then
    ' set specific layout for new rebar as fixed number, with 10 bars, distribution path length of 1.5'
    ' with bars of the bar set on the same side of the rebar plane as indicated by normal
    ' and both first and last bar in the set are shown
    rebar__1.GetShapeDrivenAccessor().SetLayoutAsFixedNumber(10, 1.5, True, True, True)
 End If

    Return rebar__1
End Function

Exceptions

Exception Condition
Autodesk.Revit.Exceptions ArgumentException The element host was not found in the given document. -or- host is not a valid rebar host. -or- The input curves is empty. -or- The input curves contains at least one curve which is not a bound Line or bound Arc and is not supported for this operation. -or- curves do not form a valid CurveLoop. -or- The input curves contains at least one helical curve and is not supported for this operation.
Autodesk.Revit.Exceptions ArgumentNullException A non-optional argument was NULL
Autodesk.Revit.Exceptions ArgumentOutOfRangeException norm has zero length. -or- A value passed for an enumeration argument is not a member of that enumeration
Autodesk.Revit.Exceptions ArgumentsInconsistentException Both useExistingShapeIfPossible and createNewShape are false. -or- curves contains non-fillet arcs with radii that are less than the minimum bend radius for the RebarBarType and bar style.
Autodesk.Revit.Exceptions DisabledDisciplineException None of the following disciplines is enabled: Structural.

See Also