VTK/Examples/Python/Infovis/ParallelCoordinatesView

# Example of how to use Parallel Coordinates View to plot and compare
# 	data set attributes.
# Use the "u" character to toggle between "inspect modes" on the parallel coordinates
#	view (i.e. between selecting data and manipulating axes).
# Lines which are commented out show alternative options.
 
import vtk
 
# Generate an example image data set with multiple attribute arrays to probe and view
# This is where you would put your reader instead of this rt->elev pipeline...
rt = vtk.vtkRTAnalyticSource()
rt.SetWholeExtent(-3,3,-3,3,-3,3)
grad = vtk.vtkImageGradient()
grad.SetDimensionality(3)
grad.SetInputConnection(rt.GetOutputPort())
brown = vtk.vtkBrownianPoints()
brown.SetMinimumSpeed(0.5)
brown.SetMaximumSpeed(1.0)
brown.SetInputConnection(grad.GetOutputPort())
elev = vtk.vtkElevationFilter()
elev.SetLowPoint(-3,-3,-3)
elev.SetHighPoint(3,3,3)
elev.SetInputConnection(brown.GetOutputPort())
 
# Set up the parallel coordinates Representation to be used in the View
rep = vtk.vtkParallelCoordinatesRepresentation()
 
# Plug your reader in here for your own data
rep.SetInputConnection(elev.GetOutputPort())
 
# List all of the attribute arrays you want plotted in parallel coordinates
rep.SetInputArrayToProcess(0,0,0,0,'RTDataGradient')
rep.SetInputArrayToProcess(1,0,0,0,'RTData')
rep.SetInputArrayToProcess(2,0,0,0,'Elevation')
rep.SetInputArrayToProcess(3,0,0,0,'BrownianVectors')
 
rep.SetUseCurves(0)		# set to 1 to use smooth curves
rep.SetLineOpacity(0.5)
 
# Set up the Parallel Coordinates View and hook in the Representation
view = vtk.vtkParallelCoordinatesView()
view.SetRepresentation(rep)
 
# Inspect Mode determines whether your interactions manipulate the axes or select data
# view.SetInspectMode(0)	# VTK_INSPECT_MANIPULATE_AXES = 0, 
view.SetInspectMode(1)		# VTK_INSPECT_SELECT_DATA = 1 
 
# Brush Mode determines the type of interaction you perform to select data
view.SetBrushModeToLasso()
# view.SetBrushModeToAngle()
# view.SetBrushModeToFunction()
# view.SetBrushModeToAxisThreshold()	# not implemented yet (as of 21 Feb 2010)
 
# Brush Operator determines how each new selection interaction changes selected lines
# view.SetBrushOperatorToAdd()
# view.SetBrushOperatorToSubtract()
# view.SetBrushOperatorToIntersect()
view.SetBrushOperatorToReplace()
 
# Define the callback routine which toggles between "Inspect Modes"
def ToggleInspectors(obj,event):
    if (view.GetInspectMode() == 0):
        view.SetInspectMode(1)
    else:
        view.SetInspectMode(0)
 
# Hook up the callback to toggle between inspect modes (manip axes & select data)
view.GetInteractor().AddObserver("UserEvent", ToggleInspectors)
 
# Set up render window
view.GetRenderWindow().SetSize(600,300)
view.ResetCamera()
view.Render()
 
# Start interaction event loop
view.GetInteractor().Start()