// PB: This implementation borrows the somewhat risky notions from the original Dynamo
// implementation. In short, it has the ability to infer a sketch plane,
// which might also mean deleting the original one.
/// <summary>
/// Initialize a ModelCurve element
/// </summary>
/// <param name="crv"></param>
/// <param name="makeReferenceCurve"></param>
private void InitModelCurve(Autodesk.Revit.DB.Curve crv, bool makeReferenceCurve)
{
//Phase 1 - Check to see if the object exists and should be rebound
var mc =
ElementBinder.GetElementFromTrace <Autodesk.Revit.DB.ModelCurve>(Document);
//There was a modelcurve, try and set sketch plane
// if you can't, rebuild
if (mc != null)
{
InternalSetCurveElement(mc);
InternalSetSketchPlaneFromCurve(crv);
return;
}
ElementId oldId = (mc != null) ? mc.Id : ElementId.InvalidElementId;
string oldUniqueId = (mc != null) ? mc.UniqueId : string.Empty;
TransactionManager.Instance.EnsureInTransaction(Document);
// (sic erat scriptum)
var sp = GetSketchPlaneFromCurve(crv);
var plane = sp.GetPlane();
if (CurveUtils.GetPlaneFromCurve(crv, true) == null)
{
var flattenCurve = Flatten3dCurveOnPlane(crv, plane);
mc = Document.IsFamilyDocument
? Document.FamilyCreate.NewModelCurve(flattenCurve, sp)
: Document.Create.NewModelCurve(flattenCurve, sp);
setCurveMethod(mc, crv);
}
else
{
mc = Document.IsFamilyDocument
? Document.FamilyCreate.NewModelCurve(crv, sp)
: Document.Create.NewModelCurve(crv, sp);
}
if (mc.SketchPlane.Id != sp.Id)
{
//THIS BIZARRE as Revit could use different existing SP, so if Revit had found better plane this sketch plane has no use
DocumentManager.Instance.DeleteElement(new ElementUUID(sp.UniqueId));
}
InternalSetCurveElement(mc);
if (oldId != mc.Id && oldId != ElementId.InvalidElementId)
{
DocumentManager.Instance.DeleteElement(new ElementUUID(oldUniqueId));
}
if (makeReferenceCurve)
{
mc.ChangeToReferenceLine();
}
TransactionManager.Instance.TransactionTaskDone();
ElementBinder.SetElementForTrace(this.InternalElement);
}
/// <summary>
/// Set the curve internally. Returns false if this method failed to set the curve
/// </summary>
/// <param name="c"></param>
/// <returns></returns>
private bool InternalSetSketchPlaneFromCurve(Autodesk.Revit.DB.Curve c)
{
TransactionManager.Instance.EnsureInTransaction(Document);
// Infer the sketch plane
Autodesk.Revit.DB.Plane plane = CurveUtils.GetPlaneFromCurve(c, false);
// attempt to change the sketch plane
bool needsRemake = false;
string idSpUnused = resetSketchPlaneMethod(this.InternalCurveElement, c, plane, out needsRemake);
// if we got a valid id, delete the old sketch plane
if (idSpUnused != String.Empty)
{
DocumentManager.Instance.DeleteElement(new ElementUUID(idSpUnused));
}
TransactionManager.Instance.TransactionTaskDone();
return(!needsRemake);
}
private static Curve Flatten3dCurveOnPlane(Curve c, Plane plane)
{
if (c is Autodesk.Revit.DB.HermiteSpline)
{
var hs = c as Autodesk.Revit.DB.HermiteSpline;
plane = CurveUtils.GetPlaneFromCurve(c, false);
var projPoints = new List <XYZ>();
foreach (var pt in hs.ControlPoints)
{
var proj = pt - (pt - plane.Origin).DotProduct(plane.Normal) * plane.Normal;
projPoints.Add(proj);
}
return(Autodesk.Revit.DB.HermiteSpline.Create(projPoints, false));
}
if (c is Autodesk.Revit.DB.NurbSpline)
{
var ns = c as Autodesk.Revit.DB.NurbSpline;
if (plane == null)
{
var bestFitPlane = Autodesk.DesignScript.Geometry.Plane.ByBestFitThroughPoints(
ns.CtrlPoints.ToList().ToPoints(false));
plane = bestFitPlane.ToPlane(false);
}
var projPoints = new List <XYZ>();
foreach (var pt in ns.CtrlPoints)
{
var proj = pt - (pt - plane.Origin).DotProduct(plane.Normal) * plane.Normal;
projPoints.Add(proj);
}
return(Autodesk.Revit.DB.NurbSpline.Create(projPoints, ns.Weights.Cast <double>().ToList(), ns.Knots.Cast <double>().ToList(), ns.Degree, ns.isClosed, ns.isRational));
}
return(c);
}
/// <summary>
/// Set the plane and the curve internally.
/// </summary>
private void InternalSetSketchPlaneFromCurve(Curve newCurve)
{
TransactionManager.Instance.EnsureInTransaction(Document);
Plane newPlane = CurveUtils.GetPlaneFromCurve(newCurve, false);
Plane oldPlane = InternalCurveElement.SketchPlane.GetPlane();
var angleBetweenPlanes = newPlane.Normal.AngleTo(oldPlane.Normal);
var distanceBetweenOrigins = newPlane.Origin.DistanceTo(oldPlane.Origin);
Autodesk.Revit.DB.SketchPlane sp = null;
// Planes are different.
if (angleBetweenPlanes > tolerance || distanceBetweenOrigins > tolerance)
{
sp = GetSketchPlaneFromCurve(newCurve);
InternalCurveElement.SetSketchPlaneAndCurve(sp, newCurve);
}
// Planes are the same.
else
{
InternalSetCurve(newCurve);
}
string idSpUnused = String.Empty;
if (sp != null && InternalCurveElement.SketchPlane.Id != sp.Id)
{
idSpUnused = sp.UniqueId;
}
// if we got a valid id, delete the old sketch plane
if (idSpUnused != String.Empty)
{
DocumentManager.Instance.DeleteElement(new ElementUUID(idSpUnused));
}
TransactionManager.Instance.TransactionTaskDone();
}
private static Autodesk.Revit.DB.SketchPlane GetSketchPlaneFromCurve(Curve c)
{
Plane plane = CurveUtils.GetPlaneFromCurve(c, false);
return(Autodesk.Revit.DB.SketchPlane.Create(Document, plane));
}
private static string resetSketchPlaneMethod(Autodesk.Revit.DB.CurveElement mc, Curve c, Autodesk.Revit.DB.Plane flattenedOnPlane, out bool needsSketchPlaneReset)
{
//do we need to reset?
needsSketchPlaneReset = false;
Autodesk.Revit.DB.Plane newPlane = flattenedOnPlane != null ? flattenedOnPlane : CurveUtils.GetPlaneFromCurve(c, false);
Autodesk.Revit.DB.Plane curPlane = mc.SketchPlane.GetPlane();
bool resetPlane = false;
{
double llSqCur = curPlane.Normal.DotProduct(curPlane.Normal);
double llSqNew = newPlane.Normal.DotProduct(newPlane.Normal);
double dotP = newPlane.Normal.DotProduct(curPlane.Normal);
double dotSqNormalized = (dotP / llSqCur) * (dotP / llSqNew);
double angleTol = System.Math.PI / 1800.0;
if (dotSqNormalized < 1.0 - angleTol * angleTol)
{
resetPlane = true;
}
}
Autodesk.Revit.DB.SketchPlane sp = null;
if (!resetPlane)
{
double originDiff = curPlane.Normal.DotProduct(curPlane.Origin - newPlane.Origin);
double tolerance = 0.000001;
if (originDiff > tolerance || originDiff < -tolerance)
{
sp = GetSketchPlaneFromCurve(c);
mc.SketchPlane = GetSketchPlaneFromCurve(c);
}
return((sp == null || mc.SketchPlane.Id == sp.Id) ? "" : sp.UniqueId);
}
//do reset if method is available
bool foundMethod = false;
if (hasMethodResetSketchPlane)
{
Type CurveElementType = typeof(Autodesk.Revit.DB.CurveElement);
MethodInfo[] curveElementMethods = CurveElementType.GetMethods(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public);
System.String nameOfMethodSetCurve = "ResetSketchPlaneAndCurve";
System.String nameOfMethodSetCurveAlt = "SetSketchPlaneAndCurve";
foreach (MethodInfo m in curveElementMethods)
{
if (m.Name == nameOfMethodSetCurve || m.Name == nameOfMethodSetCurveAlt)
{
object[] argsM = new object[2];
sp = GetSketchPlaneFromCurve(c);
argsM[0] = sp;
argsM[1] = null;
foundMethod = true;
m.Invoke(mc, argsM);
break;
}
}
}
if (!foundMethod)
{
//sp = dynRevitUtils.GetSketchPlaneFromCurve(c);
hasMethodResetSketchPlane = false;
needsSketchPlaneReset = true;
//expect exception, so try to keep old plane?
//mc.SketchPlane = sp;
return("");
}
if (sp != null && mc.SketchPlane.Id != sp.Id)
{
return(sp.UniqueId);
}
return("");
}
