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MirrorElement Method

Element Transform Utils Mirror Element Method

Creates a mirrored copy of an element about a given plane.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
Syntax 
public static void MirrorElement(
	Document document,
	ElementId elementToMirror,
	Plane plane
)

Parameters

document Document
The document that owns the element.
elementToMirror ElementId
The element to mirror.
plane Plane
The mirror plane.
Exceptions
Exception Condition
ArgumentException elementToMirror cannot be mirrored. -or- The element elementToMirror does not exist in the document -or- The input element is a Sketch member and there is no Sketch in the edit mode to place this element in.
ArgumentNullException A non-optional argument was null
Example 
public void MirrorWall(Autodesk.Revit.DB.Document document, Wall wall)
{
    Reference reference = HostObjectUtils.GetSideFaces(wall, ShellLayerType.Exterior).First();
    Face face = wall.GetGeometryObjectFromReference(reference) as Face; // get one of the wall's major side faces

    UV bboxMin = face.GetBoundingBox().Min;
    Plane plane = Plane.CreateByNormalAndOrigin(face.ComputeNormal(bboxMin), face.Evaluate(bboxMin).Add(new XYZ(10, 10, 0)));
    // create a plane based on this side face with an offset of 10 in the X & Y directions

    ElementTransformUtils.MirrorElement(document, wall.Id, plane);
}
See Also