fill vtkImageData with user data

[John Biddiscombe]

Try this...


vtkImageData *outData = get imagedata pointer here

vtkScalars *Newscalars = vtkScalars::New(VTK_FLOAT,1); // or similar
VTK_CHAR,3 for RGB etc etc
outData->SetSpacing(3.6,3.6,1); or similar
// always use 1 for unused 3rd axes, vtk dies if you don't
outData->SetDimensions(512,512,1); or similar
outData->SetOrigin(0,0,0); or similar

Newscalars->SetNumberOfScalars(512*512);

for (int i=0; i<512; i++) {
  for (int j=0; j<512; j++) {
    Newscalars->SetScalar(i*512+j, your number);
  }
}

of course it'd be better to get pointer to array and write data without
using SetScalar(...) but most of the time, its hardly matters.

Now do

outData->SetScalars(Newscalars);
Newscalars->Delete();

voila, data.

Hope this helps

John B




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