def update_pipeline(self):
"""Override this method so that it *updates* the tvtk pipeline
when data upstream is known to have changed.
This method is invoked (automatically) when the input fires a
`pipeline_changed` event.
"""
if len(self.inputs) == 0:
return
input = self.inputs[0].outputs[0]
plane = None
if input.is_a('vtkStructuredGrid'):
plane = tvtk.StructuredGridGeometryFilter()
elif input.is_a('vtkStructuredPoints') or input.is_a('vtkImageData'):
plane = tvtk.ImageDataGeometryFilter ()
elif input.is_a('vtkRectilinearGrid'):
plane = tvtk.RectilinearGridGeometryFilter ()
else:
msg = "The GridPlane component does not support the %s dataset."\
%(input.class_name)
error(msg)
raise TypeError, msg
plane.input = input
self.plane = plane
self.outputs = [plane.output]
self._update_limits()
self._update_extents()
# If the data is 2D make sure that we default to the
# appropriate axis.
extents = list(_get_extent(input))
diff = [y-x for x, y in zip(extents[::2], extents[1::2])]
if diff.count(0) > 0:
self.axis = ['x', 'y', 'z'][diff.index(0)]
def update_pipeline(self):
"""Override this method so that it *updates* the tvtk pipeline
when data upstream is known to have changed.
This method is invoked (automatically) when the input fires a
`pipeline_changed` event.
"""
if len(self.inputs) == 0:
return
input = self.inputs[0].get_output_dataset()
plane = None
if input.is_a('vtkStructuredGrid'):
plane = tvtk.StructuredGridGeometryFilter()
elif input.is_a('vtkStructuredPoints') or input.is_a('vtkImageData'):
plane = tvtk.ImageDataGeometryFilter()
elif input.is_a('vtkRectilinearGrid'):
plane = tvtk.RectilinearGridGeometryFilter()
else:
msg = "The GridPlane component does not support the %s dataset."\
%(input.class_name)
error(msg)
raise TypeError(msg)
self.configure_connection(plane, self.inputs[0])
self.plane = plane
self._update_limits()
self._update_voi()
self.outputs = [plane]