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#!/usr/bin/env python
# Run this test like so:
# $ vtkpython TestImagePlaneWidget.py -D $VTK_DATA_ROOT \
# -B $VTK_DATA_ROOT/Baseline/Widgets/
#
# $ vtkpython TestImagePlaneWidget.py --help
# provides more details on other options.
import os
import os.path
import vtk
from vtk.test import Testing
class TestImagePlaneWidget(Testing.vtkTest):
def testBug(self):
# Uncomment the next line if you want to run this via
# `gdb python`.
#raw_input('Hit Ctrl-C')
# Load some data.
v16 = vtk.vtkVolume16Reader()
v16.SetDataDimensions(64, 64)
v16.SetDataByteOrderToLittleEndian()
v16.SetFilePrefix(os.path.join(Testing.VTK_DATA_ROOT,
"Data", "headsq", "quarter"))
v16.SetImageRange(1, 93)
v16.SetDataSpacing(3.2, 3.2, 1.5)
v16.Update()
xMin, xMax, yMin, yMax, zMin, zMax = v16.GetOutput().GetWholeExtent()
img_data = v16.GetOutput()
# **************************************************
# Look here for wierdness.
# Lets create this data using the data from the reader.
my_img_data = vtk.vtkImageData()
my_img_data.SetDimensions(img_data.GetDimensions())
my_img_data.SetWholeExtent(img_data.GetWholeExtent())
my_img_data.SetExtent(img_data.GetExtent())
my_img_data.SetUpdateExtent(img_data.GetUpdateExtent())
my_img_data.SetSpacing(img_data.GetSpacing())
my_img_data.SetOrigin(img_data.GetOrigin())
my_img_data.SetScalarType(img_data.GetScalarType())
my_img_data.GetPointData().SetScalars(img_data.GetPointData().GetScalars())
my_img_data.Update()
# hang on to original image data.
orig_img_data = img_data
# hijack img_data with our own. If you comment this out everything is
# fine.
img_data = my_img_data
# **************************************************
spacing = img_data.GetSpacing()
sx, sy, sz = spacing
origin = img_data.GetOrigin()
ox, oy, oz = origin
# An outline is shown for context.
outline = vtk.vtkOutlineFilter()
outline.SetInput(img_data)
outlineMapper = vtk.vtkPolyDataMapper()
outlineMapper.SetInputConnection(outline.GetOutputPort())
outlineActor = vtk.vtkActor()
outlineActor.SetMapper(outlineMapper)
# The shared picker enables us to use 3 planes at one time
# and gets the picking order right
picker = vtk.vtkCellPicker()
picker.SetTolerance(0.005)
# The 3 image plane widgets are used to probe the dataset.
planeWidgetX = vtk.vtkImagePlaneWidget()
planeWidgetX.DisplayTextOn()
planeWidgetX.SetInput(img_data)
planeWidgetX.SetPlaneOrientationToXAxes()
planeWidgetX.SetSliceIndex(32)
planeWidgetX.SetPicker(picker)
planeWidgetX.SetKeyPressActivationValue("x")
prop1 = planeWidgetX.GetPlaneProperty()
prop1.SetColor(1, 0, 0)
planeWidgetY = vtk.vtkImagePlaneWidget()
planeWidgetY.DisplayTextOn()
planeWidgetY.SetInput(img_data)
planeWidgetY.SetPlaneOrientationToYAxes()
planeWidgetY.SetSliceIndex(32)
planeWidgetY.SetPicker(picker)
planeWidgetY.SetKeyPressActivationValue("y")
prop2 = planeWidgetY.GetPlaneProperty()
prop2.SetColor(1, 1, 0)
planeWidgetY.SetLookupTable(planeWidgetX.GetLookupTable())
# for the z-slice, turn off texture interpolation:
# interpolation is now nearest neighbour, to demonstrate
# cross-hair cursor snapping to pixel centers
planeWidgetZ = vtk.vtkImagePlaneWidget()
planeWidgetZ.DisplayTextOn()
planeWidgetZ.SetInput(img_data)
planeWidgetZ.SetPlaneOrientationToZAxes()
planeWidgetZ.SetSliceIndex(46)
planeWidgetZ.SetPicker(picker)
planeWidgetZ.SetKeyPressActivationValue("z")
prop3 = planeWidgetZ.GetPlaneProperty()
prop3.SetColor(0, 0, 1)
planeWidgetZ.SetLookupTable(planeWidgetX.GetLookupTable())
# Create the RenderWindow and Renderer
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
# Add the outline actor to the renderer, set the background
# color and size
ren.AddActor(outlineActor)
renWin.SetSize(600, 600)
ren.SetBackground(0.1, 0.1, 0.2)
current_widget = planeWidgetZ
mode_widget = planeWidgetZ
# Set the interactor for the widgets
iact = vtk.vtkRenderWindowInteractor()
iact.SetRenderWindow(renWin)
planeWidgetX.SetInteractor(iact)
planeWidgetX.On()
planeWidgetY.SetInteractor(iact)
planeWidgetY.On()
planeWidgetZ.SetInteractor(iact)
planeWidgetZ.On()
# Create an initial interesting view
ren.ResetCamera();
cam1 = ren.GetActiveCamera()
cam1.Elevation(110)
cam1.SetViewUp(0, 0, -1)
cam1.Azimuth(45)
ren.ResetCameraClippingRange()
iact.Initialize()
renWin.Render()
# Compare the images and test.
img_file = "TestImagePlaneWidget.png"
Testing.compareImage(renWin, Testing.getAbsImagePath(img_file))
# Interact if necessary.
if Testing.isInteractive():
iact.Start()
if __name__ == "__main__":
Testing.main([(TestImagePlaneWidget, 'test')])
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