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AddConstraintToSegment Method

Add a constraint that helps determine the length of a segment.

Namespace: Autodesk.Revit.DB.Structure
Assembly: RevitAPI (in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109)

Syntax

C# 
public void AddConstraintToSegment(
	int iSegment,
	ElementId paramId,
	double constraintDirCoordX,
	double constraintDirCoordY,
	int signOfZCoordOfCrossProductOfConstraintDirBySegmentDir,
	bool measureToOutsideOfBend0,
	bool measureToOutsideOfBend1
)
Visual Basic 
Public Sub AddConstraintToSegment ( _
	iSegment As Integer, _
	paramId As ElementId, _
	constraintDirCoordX As Double, _
	constraintDirCoordY As Double, _
	signOfZCoordOfCrossProductOfConstraintDirBySegmentDir As Integer, _
	measureToOutsideOfBend0 As Boolean, _
	measureToOutsideOfBend1 As Boolean _
)
Visual C++ 
public:
void AddConstraintToSegment(
	int iSegment, 
	ElementId^ paramId, 
	double constraintDirCoordX, 
	double constraintDirCoordY, 
	int signOfZCoordOfCrossProductOfConstraintDirBySegmentDir, 
	bool measureToOutsideOfBend0, 
	bool measureToOutsideOfBend1
)

Parameters

iSegment
Type: System Int32
Index of the segment (0 to NumberOfSegments - 1).
paramId
Type: Autodesk.Revit.DB ElementId
Id of a parameter to drive the constraint. To obtain the id of a shared parameter, call RebarShape.GetElementIdForExternalDefinition().
constraintDirCoordX
Type: System Double
The x-coordinate of a 2D vector specifying the constraint direction.
constraintDirCoordY
Type: System Double
The y-coordinate of a 2D vector specifying the constraint direction.
signOfZCoordOfCrossProductOfConstraintDirBySegmentDir
Type: System Int32
Legal values are 1 and -1. For a fixed-direction segment, this value is ignored. For a variable-direction segment, this value is combined with the constraint length (the nonnegative value associated with 'param') to determine the direction of the segment. For example, a segment whose direction vector lies in the upper-right quadrant of the plane, and whose x-axis projected length is A and whose y-axis projected length is B, could be created by calling: AddConstraintToSegment(iSegment, paramA, 1.0, 0.0, 1, ...) AddConstraintToSegment(iSegment, paramB, 0.0, 1.0, -1, ...)
measureToOutsideOfBend0
Type: System Boolean
Choose between two possibilities for the first reference of the length dimension. If false, the reference is at the point where the bend begins; equivalently, at the projection of the bend centerpoint onto the segment. If true, the reference is moved outward by a distance equal to the bend radius plus the bar diameter; if the bend is a right angle or greater, this is equivalent to putting the reference at the outer face of the bend.
measureToOutsideOfBend1
Type: System Boolean
Choose between two possibilities for the second reference of the length dimension.

Remarks

The vector defined by (constraintDirCoordX, constraintDirCoordY) must have a positive dot product with the desired direction of the segment. This restriction, combined with the value of signOfZCoordOfCrossProductOfConstraintDirBySegmentDir, defines a quadrant of the plane that limits the variable-angle segment.

Exceptions

Exception Condition
Autodesk.Revit.Exceptions ArgumentException iSegment is not between 0 and NumberOfSegments. -or- paramId is not the id of a shared parameter in the current document, or its unit type is not UT_Reinforcement_Length or UT_Angle. -or- The length of the vector (constraintDirCoordX, constraintDirCoordY) is too close to zero. -or- signOfZCoordOfCrossProductOfConstraintDirBySegmentDir is neither -1 nor 1.
Autodesk.Revit.Exceptions ArgumentNullException A non-optional argument was NULL

See Also