How to convert 3D Curve to 2D Curve

[Anonymous]

Dear Revit API experts,

I am trying to convert ramp to floor.

I have found how to do it using dynamo, now i want to do it using API.

The ramp face consists of HermiteSpline curve. (which i consider as 3D curve, am I right?)

I want to convert this curve to 2D. (XY surface)

Attached is the dynamo graph.

I want to find similar API method equivalent to Curve.Project in the dynamo.

Before Curve.Project

[0] Curve(StartPoint = Point(X = 1037.124, Y = 1761.638, Z = 0.000), EndPoint = Point(X = 1256.636, Y = 2737.248, Z = 0.000))
[1] Curve(StartPoint = Point(X = 1256.636, Y = 2737.248, Z = 0.000), EndPoint = Point(X = 2463.127, Y = -3567.063, Z = 990.600))
[2] Curve(StartPoint = Point(X = 2463.127, Y = -3567.063, Z = 990.600), EndPoint = Point(X = 1898.903, Y = -2741.441, Z = 990.600))
[3] Curve(StartPoint = Point(X = 1898.903, Y = -2741.441, Z = 990.600), EndPoint = Point(X = 1037.124, Y = 1761.638, Z = 0.000))

After:

[0] Line(StartPoint = Point(X = 1037.124, Y = 1761.638, Z = 0.000), EndPoint = Point(X = 1256.636, Y = 2737.248, Z = 0.000), Direction = Vector(X = 219.512, Y = 975.610, Z = 0.000, Length = 1000.000))
[1] NurbsCurve(Degree = 3)
[2] Line(StartPoint = Point(X = 2463.127, Y = -3567.063, Z = 0.000), EndPoint = Point(X = 1898.903, Y = -2741.441, Z = 0.000), Direction = Vector(X = -564.224, Y = 825.622, Z = 0.000, Length = 1000.000))
[3] NurbsCurve(Degree = 3)

Thanks.

[Revitalizer]

Hi,

just an idea:

There is a Document.ConvertModelToDetailCurves method which needs a View and a ModelCurveArray as parameters.

It returns a DetailCurveArray.

So, if you create some temporary elements (View, ModelCurves, DetailCurves), you can let Revit do the projection math.

The resulting DetailCurves' GeometryCurves is what you want to get.

Revitalizer

[Anonymous]

Hi Revitalizer,

I not yet able to draw ModelCurve of HermiteSpline or ModelNurbSpline as in this topic:

So i cant apply your idea yet. 

https://forums.autodesk.com/t5/revit-api-forum/how-to-draw-modelnurbspline/td-p/7500615

Anyway the good news is I already able to create floor from ramp.

The method i used: (for those who might need it)

1) draw 2D HermiteSpline curve as an arc at XY axis. (change all points to same Z value)

2) create flat floor (no slope)

3) change vertex of the floor.

Here is part of my code:

Floor floor = doc.Create.NewFloor(curvearrayFloor, true);
doc.Regenerate();

SlabShapeEditor slabshapeeditor = floor.SlabShapeEditor;
SlabShapeVertex slabshapevertex = null;

foreach (Curve curv in lstcurve) {
slabshapevertex = slabshapeeditor.DrawPoint(curv.GetEndPoint(0));
}
doc.Regenerate();

[jeremytammik]

Here are some more thoughts on various methods to create a sloped floor:

http://thebuildingcoder.typepad.com/blog/2014/03/creating-a-sloped-floor.html

Cheers,

Jeremy