SKETCH_PLANE_PARAM read only

[Anonymous]

Hi,

is there a way to set the work plane for an element via the API. Following code doesn't work:

Parameter p = c.get_Parameter(BuiltInParameter.SKETCH_PLANE_PARAM);
if (p != null)
{
    p.Set(r.Name);
} 

as this parameter is read only. Who knows why?

Any ideas?

Thanks

Christian

[matthew_taylor]

Hi Christian,

Depending on the element type the sketchplane may be governed by the level or the host. See FamilyPlacementType also.

What are you trying to do?

-Matt

[Anonymous]

Hey Matt,

I am in a family document. The element I am trying to set the workplane for is a modelcurve.

public static Result Create(ReferencePlane r, ModelCurve c)
{
    Parameter p = c.get_Parameter(BuiltInParameter.SKETCH_PLANE_PARAM);
    if (p != null)
    {
        p.Set(r.Name);
        return Result.Succeeded;
    } 
    else
    {
        return Result.Failed;
    }
}

Well you can do it in the UI. Please see image attached.

Thanks

Christian

[matthew_taylor]

Hi Christian,

Right.

You could do something line this if you know where you want your curve:

Dim locationCurve As DB.LocationCurve = TryCast(modelCurve.Location, DB.LocationCurve)

Dim startPoint As DB.XYZ = locationCurve.Curve.GetEndPoint(0)

Dim endPoint As DB.XYZ = locationCurve.Curve.GetEndPoint(1)

Dim newCurve As DB.Line = DB.Line.CreateBound( _
	New DB.XYZ(startPoint.X, startPoint.Y, startPoint.Z + 1.0), _
	New DB.XYZ(endPoint.X, endPoint.Y, endPoint.Z + 1.0))

locationCurve.Curve = newCurve

Or you could use:

 modelCurve.SetGeometryCurve(newCurve, True)

or (I haven't used this one):

    Dim sketchplane As DB.SketchPlane = Nothing 'define your sketch plane here
            modelCurve.SetSketchPlaneAndCurve(sketchPlane, newCurve)

or (I haven't used this one):

   Dim sketchplane As DB.SketchPlane = Nothing 'define your sketch plane here
            modelCurve.SketchPlane = sketchplane

-Matt

[Anonymous]

The ModelCurve gets created in the right sketchplane, but is not associated with the workplane. The line sits in the right spot. This is not the issue. I just need to set the work plane. That's all I need.

Revit API developer team: Please make this parameter write accessible.

Thanks

Christian

[matthew_taylor]

Christian,

'I've just hard-coded the ref plane id, but you can use a filteredelementcollector to find a specific one.
Dim refPlane As DB.ReferencePlane = TryCast(doc.GetElement(New DB.ElementId(2628)), DB.ReferencePlane)

Dim sketchplane As DB.SketchPlane = DB.SketchPlane.Create(doc, refPlane.Id)    
'you may be able to reuse an existing sketchplane instead of creating one.
modelCurve.SketchPlane = sketchplane

If the line is on the sketch plane it'll stay in the same place. If not, it'll move.

-Matt

[Anonymous]

When I create the ModelCurve I am already assigning a sketchplane:

ModelCurve hidCurve = famdoc.FamilyCreate.NewModelCurve(hidCurves[i], sk);

Still the workplane is not set and I need to assign. I will do some more testing this afternoon, but the easiest would be: make the parameter writable.

Thanks

Christian

[matthew_taylor]

Er, if you already have the sketch plane, then just set it via modelCurve.SketchPlane.

If that doesn't work, it's probably because your line isn't parallel or on the sketch plane. I would imagine that's why it wasn't set in the first place.

Edit: POST CODE.

[Anonymous · Accepted solution]

Even though the parameter is read only I think I have a solution now. Quite obvios now, but .....

The SketchPlane.Create() method as three overwrites and one is:

Find the right ReferencePlane, pass the reference of that plane to create a SketchPlane and use this SketchPlane to create your ModelCurve. The ModelCurve will be sitting in the right WorkPlane.

Hope this helps someone. Here the code:

// Get the ReferencePlane by name
ReferencePlane r = Utility.GetRefPlaneByName("Center (Front/Back)", famdoc);
// Take the reference of that plane to create a new SketchPlane
SketchPlane sk = SketchPlane.Create(famdoc, r.GetReference());
// Make the ModelCurve or whatever else
ModelCurve ElevCurve = famdoc.FamilyCreate.NewModelCurve(ElevCurves[i], sk);

regards

Christian