[vtkusers] Scalar value minima in PolyData

[Kevin H. Hobbs]

Is there a better way to find all of the positions of the scalar value
minima in a PolyData than to :
	loop over all of the points
		loop over all of the cells the point is in
			loop over all of the other points in the cell
				compare the values of the other points to the first points value
		save the points location if it is value is less than all of its neighbor's values.


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