ActiViz/C# can't create a new vtkDataArray

Support
1

Hi,

I’m trying to visualize a scalar field on an unstructured grid. I already managed to build and visualize an vtkUnstructuredGrid where Points and Cells where defined. Now I want to “plot” a scalar field on that grid…
For this, I think the easiest way is to do the following:

myVtkUnstructuredGrid.GetPointData().SetScalars(myScalarData);

The problem is ‘myScalarData’ needs to be an vtkDataArray. However I cannot create a new instance of this object. I tried the following, and they all give errors:

vtkDataArray myScalarData = new vtkDataArray();
vtkDataArray myScalarData = vtkDataArray.New();
vtkDataArray myScalarData = (vtkDataArray)vtkObject.New();

What am I doing wrong?

2

vtkDataArray is a pure abstract superclass of the type-specific data arrays such as vtkFloatArray, vtkDoubleArray, etc., hence you cannot instantiate it. Create one of these array type subclasses instead, and you should have better luck.

3

Thank you so much, that worked.

4

You are welcome :slight_smile: