[vtkusers] vtkSplineWidget doesn't go through all handles

[dean.inglis at camris.ca]

Hi Willem,

I do not see this problem occuring using
VTK CVS built with Visual Studio Express 2005.
This should not be occuring.
Can you provide a screen shot of what you
are getting when your app starts up?

Dean

I'm using VTK 5.0 with MSVS-8. I'm trying to create a vtkSplineWidget
containing, let's say, 8 handles. However, the spline only
interpolates between 5 of them. Is this intended? How can I circumvent
it?


package require vtk
package require vtkinteraction

	# create a renderer
	vtkRenderer renderer

	# create a render window
	vtkRenderWindow renWin
	renWin SetSize  1024  1024  
	renWin AddRenderer  renderer  

	# create an interactor
	vtkRenderWindowInteractor iren
	iren SetRenderWindow  renWin

	renWin SetInteractor  iren
	renderer SetRenderWindow  renWin
	renderer SetBackground  0.4392  0.5020  0.5647


	# create some spline handles
	vtkPoints points
	points InsertNextPoint 100  100  0
	points InsertNextPoint 200  100  0
	points InsertNextPoint 300  200  0
	points InsertNextPoint 800  50  0
	points InsertNextPoint 500  200  0
	points InsertNextPoint 800  500  0
	points InsertNextPoint 900  500  0
	points InsertNextPoint 1000  500  0
	# create a splinewidget
	vtkSplineWidget spline
	spline SetCurrentRenderer  renderer
	spline SetDefaultRenderer  renderer
	spline SetInteractor  iren
	spline PlaceWidget  0.0  1000.0  0.0  500.0  0.0  0.0
	spline SetNumberOfHandles [ points GetNumberOfPoints ]
        spline InitializeHandles  points
	spline On


# render the image
#
iren AddObserver UserEvent {wm deiconify .vtkInteract}
iren Initialize

# Prevent the tk window from showing up then start the event loop.
  wm withdraw .