/// <summary>
/// Sets the Euler angle of the family instance around its local Z-axis.
/// </summary>
/// <param name="degree">The Euler angle around Z-axis.</param>
/// <returns>The result family instance.</returns>
public FamilyInstance SetRotation(double degree)
{
if (this == null)
{
throw new ArgumentNullException("familyInstance");
}
TransactionManager.Instance.EnsureInTransaction(Document);
// Rotate the element.
var oldTransform = InternalFamilyInstance.GetTransform();
double[] oldRotationAngles;
TransformUtils.ExtractEularAnglesFromTransform(oldTransform, out oldRotationAngles);
Double newRotationAngle = degree * Math.PI / 180;
if (!oldRotationAngles[0].AlmostEquals(newRotationAngle, 1.0e-6))
{
double rotateAngle = newRotationAngle - oldRotationAngles[0];
var axis = Line.CreateUnbound(oldTransform.Origin, oldTransform.BasisZ);
ElementTransformUtils.RotateElement(Document, new ElementId(Id), axis, -rotateAngle);
}
TransactionManager.Instance.TransactionTaskDone();
return(this);
}
/// <summary>
/// Get the transform of the internal family instance
/// </summary>
/// <returns>The internal transform</returns>
private Autodesk.Revit.DB.Transform InternalGetTransform()
{
TransactionManager.Instance.EnsureInTransaction(Document);
Document.Regenerate();
return(InternalFamilyInstance.IsValidObject ? InternalFamilyInstance.GetTransform() : null);
}
private void InternalSetLevel(Autodesk.Revit.DB.Level level)
{
TransactionManager.Instance.EnsureInTransaction(Document);
// http://thebuildingcoder.typepad.com/blog/2011/01/family-instance-missing-level-property.html
InternalFamilyInstance.get_Parameter(BuiltInParameter.FAMILY_LEVEL_PARAM).Set(level.Id);
TransactionManager.Instance.TransactionTaskDone();
}
