[vtkusers] fill vtkImageData in 3D

[David Doria]

On Fri, Jan 7, 2011 at 2:45 PM, Rachel <aracha2010 at gmail.com> wrote:

>
> Hi Kwayeke,
>
> this is color image. To change the color R, G ,B try with this inside the
> loop
>
> Image->SetScalarComponentFromDouble(x,y,z,0, R);
> Image->SetScalarComponentFromDouble(x,y,z,1, G);
> Image->SetScalarComponentFromDouble(x,y,z,2, B);
>

Or do this:
double* pixel = static_cast<double*>(ImageData->GetScalarPointer(k,j,i));
pixel[0] = r;
pixel[1] = g;
pixel[2] = b;

This way if it is not double the only thing that changes is the 'pixel'
pointer and the cast - you don't have to think about
what SetScalarComponentFromDouble is doing.

David
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