C# data tree in Visual Studio 2013 Express

HEllo all,

I am trying to work my way around trees in Visual Studio Express 2013 (C#).

I have this to work in the C# component within Grasshopper but can't get it to work in Visual Studio. I think because I am missing the syntax.

QUESTION: Let's say I have a tree as in the attached image. I would like to access that in Visual Studio and then loop through each branch and path.

This is my attempt:

RegisterInputParams:

pManager.AddGenericParameter("Curves tree", "C", "tree test", GH_ParamAccess.tree);

RegisterOutputParams:

pManager.Register_CurveParam("Tree", "T", "Tree test", GH_ParamAccess.tree);

SolveInstance:

GH_StructurePath cc = new GH_StructurePath();

if (!DA.GetDataTree(1, cc)) return; //Gives me an error

//Here I would like to loop over each branch and each path

Thanks for your help!

Attachments:

Tree C#.JPG, 84 KB

Replies to This Discussion

Permalink Reply by HO on March 31, 2015 at 1:52pm

I got the first part to work.

REVISIONS:

SolveInstance:

Grasshopper.Kernel.Data.GH_Structure<Grasshopper.Kernel.Types.GH_Curve> ccc = new Grasshopper.Kernel.Data.GH_Structure<Grasshopper.Kernel.Types.GH_Curve>();

if (!DA.GetDataTree(1, out ccc)) return; //Error here is solved

//Any hint on how to loop overt he tree would be appreciated

Thank you!

Permalink Reply by HO on April 1, 2015 at 7:22am

Attached is the error I am getting now.

Although the error is probably due to my use of IGH_goo I am also copying the piece of code that shows how I am looping:

Grasshopper.Kernel.Data.GH_Structure<Grasshopper.Kernel.Types.IGH_Goo> c1 = new Grasshopper.Kernel.Data.GH_Structure<IGH_Goo>();

if (!DA.GetDataTree(1, out c1)) return;

for (int i = 0; i < c1.Branches.Count; i++)
{
for (int j = 0; j < c1.Branches[i].Count; j++)
{
list.Add(i.ToString());
}

}

Any reference on when to use GH_ vs IGH_goo would be really apprectiated.

Thank you.

Attachments:

Error.JPG, 58 KB

Permalink Reply by HO on April 1, 2015 at 7:31am

This is my attempt using GH_ where I get a similar error (see attached):

Grasshopper.Kernel.Data.GH_Structure<Grasshopper.Kernel.Types.GH_Curve> ccc = new Grasshopper.Kernel.Data.GH_Structure<Grasshopper.Kernel.Types.GH_Curve>();

if (!DA.GetDataTree(1, out ccc)) return;

for (int i = 0; i < ccc.Branches.Count; i++)
{
for (int j = 0; j < ccc.Branches[i].Count; j++)
{
list.Add(i.ToString());
}
}

Attachments: