[vtkusers] problem with vtkIterativeClosestPointTransform

[N.E Mackenzie-Mackay]

I am getting a "Can't execute with Null or empty target" error

Write now I am trying to use the vtkIterativeClosestPointTransform to 
find the transformation between a set of 3d points and a 3d mesh.  I 
have read the mesh from file and put the points in by hand by making a 
vtkFloatArray -> vtkPoints -> vtkPolyData.

I set up vtkIterativeClosestPointTransform as so:

vtkIterativeClosestPointTransform icp = 
vtkIterativeClosestPointTransform::New();
	icp->SetSource(points)   // points represented as vtkPolyData
	icp->SetTarget(reader->GetOutput); // where the reader is a 
vtkPolyDataReader

Later in the code I try and use the transform:

vtkActor a
	a->SetUserTransform(icp);

I think the problem lies in the fact that I am representing a set of 
points with a vtkPolyData type.  I tried to make the set of points into 
a vtkPointSet but was not able to initialize it.

Does anyone have any suggestions ?

Thanks
Neilson





When I try and use vtkIterativeClosestPointTransform