[C#]Problem in Create custom grid of point

Replies to This Discussion

Permalink Reply by Taehyuk Kwak on March 9, 2011 at 7:12pm

 

 

 

 

private void RunScript(Plane Plane, int XNum, int YNum, double Dis, ref object PointsGrid) 

 {  

//Create 2 dimentional list of points

    List<Point3d> Points = new List<Point3d>();

    Vector3d x_dir = new Vector3d(Plane.XAxis);

    x_dir = x_dir * Dis;
    Vector3d y_dir = new Vector3d(Plane.YAxis);

    y_dir = y_dir * Dis;
    Point3d Base = new Point3d(Plane.Origin);

    int i = 0;

    int j = 0;
    for (i = 0; i <= XNum; i++) {

      for (j = 0; j <= YNum; j++) {

        Point3d newPt = new Point3d(Base);

        Vector3d V1 = new Vector3d(x_dir);

        V1 = V1 * i;

        Vector3d V2 = new Vector3d(y_dir);

        V2 = V2 * j;

        newPt = newPt + V1 + V2;

        Points.Add(newPt);

  }

 

C# is case-sensitive

 

xaxis -> XAxis

yaxis -> YAxis

origin -> Origin

Permalink Reply by Giulio Piacentino on March 10, 2011 at 2:04am

Hi, ZWB and Taehyuk,

I've changed a bit the code, removing copy constructors.

       if (!plane.IsValid)
      plane = Plane.WorldXY;
   
    //Create 2 dimentional list of points
    List<Point3d> points = new List<Point3d>();

    Vector3d x_dir = plane.XAxis;
      /* Vector3d is a stuct, which means its value
         is copied (not the reference to it),
         so we do not need to copy it manually
         or call a constructor to copy.
         Structs are an addition to Java. */

    x_dir = x_dir * dis;
    Vector3d y_dir = plane.YAxis;

    y_dir = y_dir * dis;
    Point3d basePoint = plane.Origin;

    for (int i = 0; i <= xNum; i++)
    {
      for (int j = 0; j <= yNum; j++)
      {
        Vector3d V1 = x_dir * i;
        Vector3d V2 = y_dir * j;

        Point3d newPt = basePoint + V1 + V2;
        points.Add(newPt);
      }
    }

    pointsGrid = points;

- Giulio
_______________

giulio@mcneel.com
McNeel Europe

Attachments:

• grid.ghx, 34 KB

Permalink Reply by ZHAO Wenbiao on March 10, 2011 at 5:22pm

Thanks for you two to give the solution.

I wondered where you can get the information about C# explanation or help specific for grasshopper.

I got it from the file "RhinoDotNetDocs.chm". In that file, the OnPlane（openNURBS） Property is xaxis/yaxis which i s lower-case (OnPlane::xaxis ).

I often confuse about the library/function/class/definition used in grasshopper. Where can I get these ?

 

And another, after the grid, I coded the mechanism of cellular automaton by a reference from vb code.

But it didn't work and showed four Errors as followed:

1.Cannot implicitly convert type 'Rhino.Geometry.Point3d' to 'Rhino.Geometry.Point3d[*,*]'

2.'Grid' is a 'variable' but is used like a 'method'

3.'System.Collection.Generic.List<Rhino.Geometry.Point3d>.Count' is a 'property' but is used like a 'method'

4.System.Collection.Generic.List<intd>.Count' is a 'property' but is used like a 'method'

I am a new learner, i don't know how to solve and correct this error.

I appreciate you help. Thank a lot.

The ghx file is attached.

Attachments:

• CA_20110311.ask.ghx, 156 KB

Permalink Reply by Taehyuk Kwak on March 10, 2011 at 7:01pm

hi,

 

i've changed the code

 

you can get the rhinocommon documents in here

 

http://www.rhino3d.com/5/rhinocommon/index.html

Attachments:

• CA_20110311.ans.ghx, 160 KB

Permalink Reply by ZHAO Wenbiao on March 11, 2011 at 8:33am

Thanks for you help.
And it's solved at all after correcting the 'Point.count()' and 'State.count()' to 'Point.count' and 'State.count'.