I am trying a simple example of using the imaging pipeline(never used it before); it should display a
white image as follows; I am wondering
if the way I am creating the image (using vtkScalars) is the right way to do it. I only get a solid black image.
I am using a 3 component scalar array as part of the vtkImageData.

Thanks.

-- krs

void main()
{
// Create Image data

vtkImageData *image = vtkImageData::New();
image->SetDimensions (256,256,1);

vtkScalars *scalars = vtkScalars::New(VTK_UNSIGNED_CHAR, 3);
scalars->SetNumberOfComponents (3);
scalars->SetNumberOfScalars (256*256);

    int n = 0;
    for (int i = 0; i < 256; i++)
    for (int j = 0; j < 256; j++)
    {
        scalars->SetActiveComponent (0); scalars->SetScalar(n, 255);
        scalars->SetActiveComponent (1); scalars->SetScalar(n, 255);
        scalars->SetActiveComponent (2); scalars->SetScalar(n, 255);
        n++;
    }

image->GetPointData()->SetScalars (scalars);

// create mapper, imager and image window

vtkImageMapper *imapper = vtkImageMapper::New();
    imapper->SetInput (image);
    imapper->SetZSlice (0);
vtkActor2D *image_actor = vtkActor2D::New();
    image_actor->SetMapper (imapper);

vtkImager *ren1 = vtkImager::New();
ren1->AddActor2D (image_actor);
ren1->SetViewport (0.0, 1.0, 0.0, 1.0);

vtkImageWindow *renWin = vtkImageWindow::New();
renWin->SetSize( 256, 256 );
renWin->AddImager(ren1);

renWin->Render();

sleep (5);
}

-- 
K.R.Subramanian                           Phone: (704) 547-4872
Department of Computer Science            FAX:   (704) 547-3516
UNC Charlotte                             Email: krs@cs.uncc.edu
9201 Univ. City Blvd.                     WWW: http://www.cs.uncc.edu/~krs
Charlotte, NC 28223-0001