Programming in Grasshopper Assembly

Replies to This Discussion

Permalink Reply by Daniel González Abalde on June 11, 2015 at 4:06am

I think that is somethin like... (in vb)

Dim AA as new integer

DA.getData(0 <index of input>, AA)

DA.setData(0 <index of output>, AA)

Permalink Reply by Roman Baudisch on June 11, 2015 at 5:13am

You mean like this?

I get an Error that says,

"Use of a not assigned variable AA"

What did I miss?

 

Attachments:

• Frage1.1.JPG, 28 KB
• Fehler 1.1.JPG, 43 KB

Permalink Reply by Daniel González Abalde on June 11, 2015 at 5:24am

I'm new in c# but try this.

int AA = new int();
DA.GetData(0, ref AA);
DA.SetData(0, AA);

Permalink Reply by Giulio Piacentino on June 11, 2015 at 5:33am

More generally, you can use default(variableType); as first assignment.
That is the same as null for reference types, and 0, 0.0 or false for integer and Boolean types. (new) is fine here, but with reference types it is a waste (it will use new memory).

Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Permalink Reply by Roman Baudisch on June 11, 2015 at 6:21am

I did like this:

int A = new int();
int B = new int();
int C = new int();
DA.GetData(0, ref A);
DA.GetData(1, ref B);
C = A * B;
DA.SetData(0, C);

and it worked, with your help!
Thanks!

Permalink Reply by David Rutten on June 11, 2015 at 6:45am

int A = 0;

int B = 0;

int C = 0;

will also work and be slightly more performant.

Permalink Reply by Roman Baudisch on June 11, 2015 at 8:40am

Thank you for the update.

Two more questions came up:

1. How do I assign a Icon for my component?

return Resources.IconForThisComponent; is described to be the right command, but I dont get it to work...

2. Is it possible to put two components (two different tools) in one File?! 

I would like to learn more about doing a good PlugIn with different features, but I didnt find a good Manuals or Handbook for the Grasshopper AssemblyWizard that helps me being more efficient...

Do you know something that provides more detailed informations here?

Thanks for any help.

Permalink Reply by Giulio Piacentino on June 11, 2015 at 8:53am

Yes.

The Grasshopper SDK documentation downloadable with the _GrasshopperGetSDKDocumentation command.

To just add a new component (battery), the wizard can still help. Just use

1) Project => Add Class... => Empty Grasshopper Component from the VS top menu or
2) Right click a project or a folder in the Solution Explorer window, and choose Add => New Item => Empty Grasshopper Component

I would still advise to read the SDK documentation and a good C# programming book!

I hope this helps,

Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Permalink Reply by Roman Baudisch on June 11, 2015 at 9:14am

Thank you, that helps!

I will start reading :)

Have a nice evening!

Permalink Reply by Roman Baudisch on June 18, 2015 at 7:58am

Hallo everybody,

I have another question concerning the

DA.GetData() command, that should be very easy for programmers:

Can you explain how I can use DA.GetDataSet(),

is it an array?

Can I import information with GetDataSet(), is this an array

and how can I call the parts of the array?

Like:

...

for(int i =0; i<8,++i)

{

int C = 0;

C = x[i];

}

....

Permalink Reply by David Rutten on June 18, 2015 at 9:40am

GetDataSet is not a method. Do you mean GetDataList?