Get branches with partial path.

How I can get branches use partial path?

For example, have

{0,0,0}

{0,0,1}

{1,1,0}

{1,1,1}

{1,1,2}

{2,2,0}

For {0,0} return {0,0,0}, {0,0,1}

For {1,1} return {1,1,0}, {1,1,1}, {1,1,2}

For {2,2} return {2,2,0}

Replies to This Discussion

Permalink Reply by David Rutten on June 18, 2014 at 1:57am

I don't follow. Can you elaborate more on what your code is supposed to achieve? Perhaps post the signature of the method you're trying to write?

David Rutten

david@mcneel.com

Permalink Reply by Danny Boyes on June 18, 2014 at 2:40am

I think he means wild cards in the mask and [Split Tree]

{0;0;?} to get {0;0;0}, {0;0;1}

{1;1;?} to get {1;1;0}, {1;1;1}, {1;1;2}

{2;2;?} to get {2;2;0}

{0;*} to get {0;0;0}, {0;0;1}

{1;*} to get {1;1;0}, {1;1;1}, {1;1;2}

{2;*} to get {2;2;0}

More on Mask rules here: http://www.grasshopper3d.com/forum/topics/datatree-selection-rules

Permalink Reply by David Rutten on June 18, 2014 at 4:09am

It was posted in the coding forum, so I figured he was after code... but this makes sense.

David Rutten

david@mcneel.com

Permalink Reply by Danny Boyes on June 18, 2014 at 4:27am

Sorry I did notice this and meant to phrase my reply along the lines of "Like the Split Tree Component".... brain not engaged yet

Permalink Reply by Ivan on June 18, 2014 at 11:31am

Yes, like this, but in C# or VB.

Permalink Reply by David Rutten on June 18, 2014 at 12:32pm

You can use split tree logic, it is available through the Gh SDK, however this is such a simple case that you may as well write it from scratch. I'd ask again to see the signature of the function you're after, I don't know exactly how the paths are currently stored, what data is associated with them and how you want them in return.

David Rutten

david@mcneel.com

Permalink Reply by Ivan on June 18, 2014 at 8:32pm

I have tree, with 3 depth for all branches.

Function get first two numbers for path. And return new tree with one level.

Function which I use, for describe logic.

private DataTree<Object> _GetData(DataTree<Object> data, int number1, int number2)
{
DataTree<Object> res = new DataTree<Object>();
string path = number1 + ";" + number2 + ";";

if (number1 >= 0 && number2 >=0 )
for(int i = 0; i < data.BranchCount; i++) {
string str = data.Path(i).ToString().Trim(new char[] {'{', '}'});
string part = str.Substring(0, path.Length);
string idx = str.Substring(path.Length);
if (path.Equals(part))
for(int j = 0; j < data.Branch(i).Count; j++)
res.Add(data.Branch(i)[j], new GH_Path(Convert.ToInt32(idx)));
}
return res;
}

I loop all braches, get it's path and compare to string. Last number(variable idx) from branch path use for numbering result tree.

How I can simplify this function, use mask rules?

Permalink Reply by David Rutten on June 19, 2014 at 1:21am

This would be my suggestion:

private DataTree<Object> GetBranches(DataTree<Object> data, params int[] pathStart)
{
GH_Path pathFilter = new GH_Path(pathStart);
DataTree<Object> result = new DataTree<Object>();

for (int i = 0; i < data.BranchCount; i++)
{
GH_Path path = data.Path(i);
List<Object> list = data.Branch(i);

int ad = 0;
if (path.IsAncestor(pathFilter, ref ad))
result.AddRange(list, path);
}
return result;
}

David Rutten

david@mcneel.com

Permalink Reply by Ivan on June 19, 2014 at 8:38am

Thank you for code. I don't known about IsAncestor method.

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