[vtkusers] vtkResliceImage and appending slices

[zarko.milosevic]

Hi David,

Some basic intro:

I first create one 3D vtkParametricSpline that goes through volume (DICOM
image stack). You can consider that spline as central line of some blood
vessel.
In one loop I got through all points and create Directional vectors by
subtracting (i+1)th point from ith point ofthe spline.
Next I create 4x4 matrix (re-slice axes) based on that directional vector
and two vectors perpendicular to directional one. Actually I create
coordinate frame based on that three vectors.
Every iteration of the loop ends with new re-slice axes and new oblique
slice. 

What I want is to merge those slices in one new 3D image which a will on the
end slice it with vtkImageReslice.

Here is some code:
{
// vtkResliceImage initialization
	_imageReslice = vtkSmartPointer<vtkImageReslice>::New();
	_imageReslice->SetInputConnection(reader->GetOutputPort());
	_imageReslice->SetResliceAxes(this->GetViewAxes());
	_imageReslice->SetOutputDimensionality(2);

	vtkSmartPointer<vtkLookupTable> lut =
vtkSmartPointer<vtkLookupTable>::New();
	lut->SetRange(0, 255);
	lut->SetValueRange(0.0, 1.0);
	lut->SetSaturationRange(0.0, 0.0);
	lut->SetRampToLinear();
	lut->Build();

	vtkSmartPointer<vtkImageMapToColors> colorMapper =    
        vtkSmartPointer<vtkImageMapToColors>::New();

	colorMapper->SetLookupTable(lut);
	colorMapper->SetInputConnection(_imageReslice->GetOutputPort());

	_actorImage = vtkSmartPointer<vtkImageActor>::New();
	_actorImage->SetInput(colorMapper->GetOutput());
	_renderer = vtkSmartPointer<vtkRenderer>::New();
	.
	.
	.
}

{	
// Iteration through spline - this is part of from some other method
	vtkSmartPointer<vtkMatrix4x4> axes = null;
	axes = GetViewAxes();
	while(axes)
	{
		_imageReslice->SetResliceAxes();
		_imageReslice->Update();
		axes = GetViewAxes(); // in this method I calculate re-slice axes
	}
	.
	.
	.

// Here after every iteration I get new oblique slice. What I want is to
join all slices together in
// one new 3d image which will be input for new vtkImageReslice object.
}



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