/// <summary>
/// Generate a Transform instance which as Transform property of BoundingBoxXYZ,
/// when the user select a floor, this method will be called
/// </summary>
/// <returns>the reference of Transform, return null if it can't be generated</returns>
Transform GenerateFloorTransform()
{
Transform transform = null;
Floor floor = m_currentComponent as Floor;
// First get the Analytical Model lines
AnalyticalModel model = floor.GetAnalyticalModel();
if (null == model)
{
m_errorInformation = "Please select a structural floor.";
return(transform);
}
CurveArray curves = m_project.Document.Application.Create.NewCurveArray();
IList <Curve> curveList = model.GetCurves(AnalyticalCurveType.ActiveCurves);
foreach (Curve curve in curveList)
{
curves.Append(curve);
}
if (null == curves || true == curves.IsEmpty)
{
m_errorInformation = "The program should never go here.";
return(transform);
}
// Now I am sure I can create a transform instance.
transform = Transform.Identity;
// Third find the middle point of the floor and set it as Origin property.
Autodesk.Revit.DB.XYZ midPoint = XYZMath.FindMiddlePoint(curves);
transform.Origin = midPoint;
// At last find out the directions of the created view, and set it as Basis property.
Autodesk.Revit.DB.XYZ basisZ = XYZMath.FindFloorViewDirection(curves);
Autodesk.Revit.DB.XYZ basisX = XYZMath.FindRightDirection(basisZ);
Autodesk.Revit.DB.XYZ basisY = XYZMath.FindUpDirection(basisZ);
transform.set_Basis(0, basisX);
transform.set_Basis(1, basisY);
transform.set_Basis(2, basisZ);
return(transform);
}