Convert of Rhino.Geometry.BrepEdge

Good evening everyone,

I am writing a component using visual studio (c#), which gets as input a surface (EdgeSrf). Within the component, I loop through the edges and need to get the geometrical definitions, such as coordinates of the points.

I can't fix a problem and hope someone can help me, for converting the edge-definition

- the surface is a GH_Brep

- the contemplated edge type is Rhino.Geometry.BrepEdge (Nurbs Curve)

- needed conversion to GH_Curve

the conversion fails: "rtrn = false", but I don't know why

the code is as follows:

//declaration

GH_Brep area_GH = (GH_Brep)area
// object area is from type Grasshopper.Kernel.Types.GH_Brep

GH_Curve edge_GH = new GH_Curve();

bool rtrn = Grasshopper.Kernel.GH_Convert.
ToGHCurve(area_GH.Value.Edges[i], GH_Conversion.Both, ref edge_GH)

I hope someone has a suggestion.

Thank you, Konrad

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Replies to This Discussion

Permalink Reply by Joseph Oster on March 16, 2017 at 1:34pm

http://www.grasshopper3d.com/forum/categories/vb-c-and-python-codin...

Permalink Reply by David Rutten on March 16, 2017 at 3:08pm

Without testing, how about this:

Brep area = null;

if (!DA.GetData(?, ref area)) return;

if (area == null) return;

List<Curve> edges = new List<Curve>();

foreach (BrepEdge edge in area.Edges)

edges.Add(edge.DuplicateCurve());

DA.SetDataList(?, edges);

You don't have to use GH_Brep and GH_Curve if you don't want to, Breps and Curves will automatically be converted. Of course you can use GH_Brep, in which case you'll have to access it's Value property.

You can also construct a GH_Curve directly by providing it with a Rhino.Geomety.Curve.

Permalink Reply by Konrad on March 16, 2017 at 4:06pm