def test_skybox():
# Test scene created without skybox
scene = window.Scene()
npt.assert_warns(UserWarning, scene.skybox)
# Test removing automatically shown skybox
test_tex = Texture()
test_tex.CubeMapOn()
checker_arr = np.array([[1, 0], [0, 1]], dtype=np.uint8) * 255
for i in range(6):
vtk_img = ImageData()
vtk_img.SetDimensions(2, 2, 1)
img_arr = np.zeros((2, 2, 3), dtype=np.uint8)
img_arr[:, :, i // 2] = checker_arr
vtk_arr = numpy_support.numpy_to_vtk(img_arr.reshape((-1, 3),
order='F'))
vtk_arr.SetName('Image')
img_point_data = vtk_img.GetPointData()
img_point_data.AddArray(vtk_arr)
img_point_data.SetActiveScalars('Image')
test_tex.SetInputDataObject(i, vtk_img)
scene = window.Scene(skybox=test_tex)
report = window.analyze_scene(scene)
npt.assert_equal(report.actors, 1)
ss = window.snapshot(scene)
npt.assert_array_equal(ss[75, 75, :], [0, 0, 255])
npt.assert_array_equal(ss[75, 225, :], [0, 0, 0])
scene.yaw(90)
ss = window.snapshot(scene)
npt.assert_array_equal(ss[75, 75, :], [255, 0, 0])
npt.assert_array_equal(ss[75, 225, :], [0, 0, 0])
scene.pitch(90)
ss = window.snapshot(scene)
npt.assert_array_equal(ss[75, 75, :], [0, 0, 0])
npt.assert_array_equal(ss[75, 225, :], [0, 255, 0])
# Test skybox is not added twice
scene.skybox()
report = window.analyze_scene(scene)
npt.assert_equal(report.actors, 1)
# Test make skybox invisible
scene.skybox(visible=False)
report = window.analyze_scene(scene)
npt.assert_equal(report.actors, 0)
ss = window.snapshot(scene)
npt.assert_array_equal(ss[75, 75, :], [0, 0, 0])
scene.yaw(90)
ss = window.snapshot(scene)
npt.assert_array_equal(ss[75, 75, :], [0, 0, 0])
scene.pitch(90)
ss = window.snapshot(scene)
npt.assert_array_equal(ss[75, 225, :], [0, 0, 0])
# Test make skybox visible again
scene.skybox(visible=True)
report = window.analyze_scene(scene)
npt.assert_equal(report.actors, 1)
def test_text_widget():
interactive = False
scene = window.Scene()
axes = actor.axes()
window.add(scene, axes)
scene.ResetCamera()
show_manager = window.ShowManager(scene, size=(900, 900))
if interactive:
show_manager.initialize()
show_manager.render()
fetch_viz_icons()
button_png = read_viz_icons(fname='home3.png')
def button_callback(obj, event):
print('Button Pressed')
button = widget.button(show_manager.iren, show_manager.scene,
button_callback, button_png, (.8, 1.2), (100, 100))
global rulez
rulez = True
def text_callback(obj, event):
global rulez
print('Text selected')
if rulez:
obj.GetTextActor().SetInput("Diffusion Imaging Rulez!!")
rulez = False
else:
obj.GetTextActor().SetInput("Diffusion Imaging in Python")
rulez = True
show_manager.render()
text = widget.text(show_manager.iren,
show_manager.scene,
text_callback,
message="Diffusion Imaging in Python",
left_down_pos=(0., 0.),
right_top_pos=(0.4, 0.05),
opacity=1.,
border=False)
if not interactive:
button.Off()
text.Off()
pass
if interactive:
show_manager.render()
show_manager.start()
report = window.analyze_scene(scene)
npt.assert_equal(report.actors, 3)
def test_peak_slicer(interactive=False):
_peak_dirs = np.array([[1, 0, 0], [0, 1, 0], [0, 0, 1]], dtype='f4')
# peak_dirs.shape = (1, 1, 1) + peak_dirs.shape
peak_dirs = np.zeros((11, 11, 11, 3, 3))
peak_values = np.random.rand(11, 11, 11, 3)
peak_dirs[:, :, :] = _peak_dirs
scene = window.Scene()
peak_actor = actor.peak_slicer(peak_dirs)
scene.add(peak_actor)
scene.add(actor.axes((11, 11, 11)))
if interactive:
window.show(scene)
scene.clear()
scene.add(peak_actor)
scene.add(actor.axes((11, 11, 11)))
for k in range(11):
peak_actor.display_extent(0, 10, 0, 10, k, k)
for j in range(11):
peak_actor.display_extent(0, 10, j, j, 0, 10)
for i in range(11):
peak_actor.display(i, None, None)
scene.rm_all()
peak_actor = actor.peak_slicer(
peak_dirs,
peak_values,
mask=None,
affine=np.diag([3, 2, 1, 1]),
colors=None,
opacity=0.8,
linewidth=3,
lod=True,
lod_points=10 ** 4,
lod_points_size=3)
scene.add(peak_actor)
scene.add(actor.axes((11, 11, 11)))
if interactive:
window.show(scene)
report = window.analyze_scene(scene)
ex = ['vtkLODActor', 'vtkOpenGLActor']
npt.assert_equal(report.actors_classnames, ex)
# 6d data
data_6d = (255 * np.random.rand(5, 5, 5, 5, 5, 5))
npt.assert_raises(ValueError, actor.peak_slicer, data_6d, data_6d)
def test_scene():
scene = window.Scene()
npt.assert_equal(scene.size(), (0, 0))
# background color for scene (1, 0.5, 0)
# 0.001 added here to remove numerical errors when moving from float
# to int values
bg_float = (1, 0.501, 0)
# that will come in the image in the 0-255 uint scale
bg_color = tuple((np.round(255 * np.array(bg_float))).astype('uint8'))
scene.background(bg_float)
# window.show(scene)
arr = window.snapshot(scene)
report = window.analyze_snapshot(arr,
bg_color=bg_color,
colors=[bg_color, (0, 127, 0)])
npt.assert_equal(report.objects, 0)
npt.assert_equal(report.colors_found, [True, False])
axes = actor.axes()
scene.add(axes)
# window.show(scene)
arr = window.snapshot(scene)
report = window.analyze_snapshot(arr, bg_color)
npt.assert_equal(report.objects, 1)
scene.rm(axes)
arr = window.snapshot(scene)
report = window.analyze_snapshot(arr, bg_color)
npt.assert_equal(report.objects, 0)
scene.add(axes)
arr = window.snapshot(scene)
report = window.analyze_snapshot(arr, bg_color)
npt.assert_equal(report.objects, 1)
scene.rm_all()
arr = window.snapshot(scene)
report = window.analyze_snapshot(arr, bg_color)
npt.assert_equal(report.objects, 0)
ren2 = window.Scene(bg_float)
ren2.background((0, 0, 0.))
report = window.analyze_scene(ren2)
npt.assert_equal(report.bg_color, (0, 0, 0))
ren2.add(axes)
report = window.analyze_scene(ren2)
npt.assert_equal(report.actors, 3)
ren2.rm(axes)
report = window.analyze_scene(ren2)
npt.assert_equal(report.actors, 0)
with captured_output() as (out, err):
scene.camera_info()
npt.assert_equal(
out.getvalue().strip(), '# Active Camera\n '
'Position (0.00, 0.00, 1.00)\n '
'Focal Point (0.00, 0.00, 0.00)\n '
'View Up (0.00, 1.00, 0.00)')
npt.assert_equal(err.getvalue().strip(), '')
def test_bundle_maps():
scene = window.Scene()
bundle = simulated_bundle(no_streamlines=10, waves=False)
metric = 100 * np.ones((200, 200, 200))
# add lower values
metric[100, :, :] = 100 * 0.5
# create a nice orange-red colormap
lut = actor.colormap_lookup_table(scale_range=(0., 100.),
hue_range=(0., 0.1),
saturation_range=(1, 1),
value_range=(1., 1))
line = actor.line(bundle, metric, linewidth=0.1, lookup_colormap=lut)
scene.add(line)
scene.add(actor.scalar_bar(lut, ' '))
report = window.analyze_scene(scene)
npt.assert_almost_equal(report.actors, 1)
# window.show(scene)
scene.clear()
nb_points = np.sum([len(b) for b in bundle])
values = 100 * np.random.rand(nb_points)
# values[:nb_points/2] = 0
line = actor.streamtube(bundle, values, linewidth=0.1, lookup_colormap=lut)
scene.add(line)
# window.show(scene)
report = window.analyze_scene(scene)
npt.assert_equal(report.actors_classnames[0], 'vtkLODActor')
scene.clear()
colors = np.random.rand(nb_points, 3)
# values[:nb_points/2] = 0
line = actor.line(bundle, colors, linewidth=2)
scene.add(line)
# window.show(scene)
report = window.analyze_scene(scene)
npt.assert_equal(report.actors_classnames[0], 'vtkLODActor')
# window.show(scene)
arr = window.snapshot(scene)
report2 = window.analyze_snapshot(arr)
npt.assert_equal(report2.objects, 1)
# try other input options for colors
scene.clear()
actor.line(bundle, (1., 0.5, 0))
actor.line(bundle, np.arange(len(bundle)))
actor.line(bundle)
colors = [np.random.rand(*b.shape) for b in bundle]
actor.line(bundle, colors=colors)
def test_odf_slicer(interactive=False):
sphere = get_sphere('symmetric362')
shape = (11, 11, 11, sphere.vertices.shape[0])
fid, fname = mkstemp(suffix='_odf_slicer.mmap')
print(fid)
print(fname)
odfs = np.memmap(fname, dtype=np.float64, mode='w+', shape=shape)
odfs[:] = 1
affine = np.eye(4)
scene = window.Scene()
mask = np.ones(odfs.shape[:3])
mask[:4, :4, :4] = 0
odfs[..., 0] = 1
odf_actor = actor.odf_slicer(odfs,
affine,
mask=mask,
sphere=sphere,
scale=.25,
colormap='blues')
fa = 0. * np.zeros(odfs.shape[:3])
fa[:, 0, :] = 1.
fa[:, -1, :] = 1.
fa[0, :, :] = 1.
fa[-1, :, :] = 1.
fa[5, 5, 5] = 1
k = 5
I, J, _ = odfs.shape[:3]
fa_actor = actor.slicer(fa, affine)
fa_actor.display_extent(0, I, 0, J, k, k)
scene.add(odf_actor)
scene.reset_camera()
scene.reset_clipping_range()
odf_actor.display_extent(0, I, 0, J, k, k)
odf_actor.GetProperty().SetOpacity(1.0)
if interactive:
window.show(scene, reset_camera=False)
arr = window.snapshot(scene)
report = window.analyze_snapshot(arr, find_objects=True)
npt.assert_equal(report.objects, 11 * 11)
scene.clear()
scene.add(fa_actor)
scene.reset_camera()
scene.reset_clipping_range()
if interactive:
window.show(scene)
mask[:] = 0
mask[5, 5, 5] = 1
fa[5, 5, 5] = 0
fa_actor = actor.slicer(fa, None)
fa_actor.display(None, None, 5)
odf_actor = actor.odf_slicer(odfs,
None,
mask=mask,
sphere=sphere,
scale=.25,
colormap='blues',
norm=False,
global_cm=True)
scene.clear()
scene.add(fa_actor)
scene.add(odf_actor)
scene.reset_camera()
scene.reset_clipping_range()
if interactive:
window.show(scene)
scene.clear()
scene.add(odf_actor)
scene.add(fa_actor)
odfs[:, :, :] = 1
mask = np.ones(odfs.shape[:3])
odf_actor = actor.odf_slicer(odfs,
None,
mask=mask,
sphere=sphere,
scale=.25,
colormap='blues',
norm=False,
global_cm=True)
scene.clear()
scene.add(odf_actor)
scene.add(fa_actor)
scene.add(actor.axes((11, 11, 11)))
for i in range(11):
odf_actor.display(i, None, None)
fa_actor.display(i, None, None)
if interactive:
window.show(scene)
for j in range(11):
odf_actor.display(None, j, None)
fa_actor.display(None, j, None)
if interactive:
window.show(scene)
# with mask equal to zero everything should be black
mask = np.zeros(odfs.shape[:3])
odf_actor = actor.odf_slicer(odfs,
None,
mask=mask,
sphere=sphere,
scale=.25,
colormap='blues',
norm=False,
global_cm=True)
scene.clear()
scene.add(odf_actor)
scene.reset_camera()
scene.reset_clipping_range()
if interactive:
window.show(scene)
npt.assert_raises(IOError,
actor.odf_slicer,
odfs,
None,
mask=None,
sphere=sphere,
scale=.25,
colormap=None,
norm=False,
global_cm=True)
# colormap=None and global_cm=False results in directionally encoded colors
scene.clear()
scene.add(odf_actor)
scene.add(fa_actor)
odfs[:, :, :] = 1
odf_actor = actor.odf_slicer(odfs,
None,
mask=None,
sphere=sphere,
scale=.25,
colormap=None,
norm=False,
global_cm=False)
report = window.analyze_scene(scene)
npt.assert_equal(report.actors, 1)
npt.assert_equal(report.actors_classnames[0], 'vtkLODActor')
del odf_actor
odfs._mmap.close()
del odfs
os.close(fid)
os.remove(fname)
def test_scene():
scene = window.Scene()
# Scene size test
npt.assert_equal(scene.size(), (0, 0))
# Color background test
# Background color for scene (1, 0.5, 0). 0.001 added here to remove
# numerical errors when moving from float to int values
bg_float = (1, 0.501, 0)
# That will come in the image in the 0-255 uint scale
bg_color = tuple((np.round(255 * np.array(bg_float))).astype('uint8'))
scene.background(bg_float)
arr = window.snapshot(scene)
report = window.analyze_snapshot(arr, bg_color=bg_color,
colors=[bg_color, (0, 127, 0)])
npt.assert_equal(report.objects, 0)
npt.assert_equal(report.colors_found, [True, False])
# Add actor to scene to test the remove actor function by analyzing a
# snapshot
axes = actor.axes()
scene.add(axes)
arr = window.snapshot(scene)
report = window.analyze_snapshot(arr, bg_color)
npt.assert_equal(report.objects, 1)
# Test remove actor function by analyzing a snapshot
scene.rm(axes)
arr = window.snapshot(scene)
report = window.analyze_snapshot(arr, bg_color)
npt.assert_equal(report.objects, 0)
# Add actor to scene to test the remove all actors function by analyzing a
# snapshot
scene.add(axes)
arr = window.snapshot(scene)
report = window.analyze_snapshot(arr, bg_color)
npt.assert_equal(report.objects, 1)
# Test remove all actors function by analyzing a snapshot
scene.rm_all()
arr = window.snapshot(scene)
report = window.analyze_snapshot(arr, bg_color)
npt.assert_equal(report.objects, 0)
# Test change background color from scene by analyzing the scene
ren2 = window.Scene(bg_float)
ren2.background((0, 0, 0.))
report = window.analyze_scene(ren2)
npt.assert_equal(report.bg_color, (0, 0, 0))
# Add actor to scene to test the remove actor function by analyzing the
# scene
ren2.add(axes)
report = window.analyze_scene(ren2)
npt.assert_equal(report.actors, 1)
# Test remove actor function by analyzing the scene
ren2.rm(axes)
report = window.analyze_scene(ren2)
npt.assert_equal(report.actors, 0)
# Test camera information retrieving
with captured_output() as (out, err):
scene.camera_info()
npt.assert_equal(out.getvalue().strip(),
'# Active Camera\n '
'Position (0.00, 0.00, 1.00)\n '
'Focal Point (0.00, 0.00, 0.00)\n '
'View Up (0.00, 1.00, 0.00)')
npt.assert_equal(err.getvalue().strip(), '')
# Test skybox
scene = window.Scene()
npt.assert_equal(scene.GetUseImageBasedLighting(), False)
npt.assert_equal(scene.GetAutomaticLightCreation(), 1)
npt.assert_equal(scene.GetSphericalHarmonics(), None)
npt.assert_equal(scene.GetEnvironmentTexture(), None)
test_tex = Texture()
scene = window.Scene(skybox=test_tex)
npt.assert_equal(scene.GetUseImageBasedLighting(), True)
npt.assert_equal(scene.GetAutomaticLightCreation(), 0)
npt.assert_equal(scene.GetSphericalHarmonics(), None)
npt.assert_equal(scene.GetEnvironmentTexture(), test_tex)
# Test automatically shown skybox
test_tex = Texture()
test_tex.CubeMapOn()
checker_arr = np.array([[1, 0], [0, 1]], dtype=np.uint8) * 255
for i in range(6):
vtk_img = ImageData()
vtk_img.SetDimensions(2, 2, 1)
img_arr = np.zeros((2, 2, 3), dtype=np.uint8)
img_arr[:, :, i // 2] = checker_arr
vtk_arr = numpy_support.numpy_to_vtk(img_arr.reshape((-1, 3),
order='F'))
vtk_arr.SetName('Image')
img_point_data = vtk_img.GetPointData()
img_point_data.AddArray(vtk_arr)
img_point_data.SetActiveScalars('Image')
test_tex.SetInputDataObject(i, vtk_img)
scene = window.Scene(skybox=test_tex)
report = window.analyze_scene(scene)
npt.assert_equal(report.actors, 1)
ss = window.snapshot(scene)
npt.assert_array_equal(ss[75, 75, :], [0, 0, 255])
npt.assert_array_equal(ss[75, 225, :], [0, 0, 0])
scene.yaw(90)
ss = window.snapshot(scene)
npt.assert_array_equal(ss[75, 75, :], [255, 0, 0])
npt.assert_array_equal(ss[75, 225, :], [0, 0, 0])
scene.pitch(90)
ss = window.snapshot(scene)
npt.assert_array_equal(ss[75, 75, :], [0, 0, 0])
npt.assert_array_equal(ss[75, 225, :], [0, 255, 0])
def test_button_and_slider_widgets():
recording = False
filename = "test_button_and_slider_widgets.log.gz"
recording_filename = pjoin(DATA_DIR, filename)
scene = window.Scene()
# create some minimalistic streamlines
lines = [
np.array([[-1, 0, 0.], [1, 0, 0.]]),
np.array([[-1, 1, 0.], [1, 1, 0.]])
]
colors = np.array([[1., 0., 0.], [0.3, 0.7, 0.]])
stream_actor = actor.streamtube(lines, colors)
states = {
'camera_button_count': 0,
'plus_button_count': 0,
'minus_button_count': 0,
'slider_moved_count': 0,
}
scene.add(stream_actor)
# the show manager allows to break the rendering process
# in steps so that the widgets can be added properly
show_manager = window.ShowManager(scene, size=(800, 800))
if recording:
show_manager.initialize()
show_manager.render()
def button_callback(obj, event):
# print('Camera pressed')
states['camera_button_count'] += 1
def button_plus_callback(obj, event):
# print('+ pressed')
states['plus_button_count'] += 1
def button_minus_callback(obj, event):
# print('- pressed')
states['minus_button_count'] += 1
fetch_viz_icons()
button_png = read_viz_icons(fname='camera.png')
button = widget.button(show_manager.iren, show_manager.scene,
button_callback, button_png, (.98, 1.), (80, 50))
button_png_plus = read_viz_icons(fname='plus.png')
button_plus = widget.button(show_manager.iren, show_manager.scene,
button_plus_callback, button_png_plus,
(.98, .9), (120, 50))
button_png_minus = read_viz_icons(fname='minus.png')
button_minus = widget.button(show_manager.iren, show_manager.scene,
button_minus_callback, button_png_minus,
(.98, .9), (50, 50))
def print_status(obj, event):
rep = obj.GetRepresentation()
stream_actor.SetPosition((rep.GetValue(), 0, 0))
states['slider_moved_count'] += 1
slider = widget.slider(show_manager.iren,
show_manager.scene,
callback=print_status,
min_value=-1,
max_value=1,
value=0.,
label="X",
right_normalized_pos=(.98, 0.6),
size=(120, 0),
label_format="%0.2lf")
# This callback is used to update the buttons/sliders' position
# so they can stay on the right side of the window when the window
# is being resized.
global size
size = scene.GetSize()
if recording:
show_manager.record_events_to_file(recording_filename)
print(states)
else:
show_manager.play_events_from_file(recording_filename)
npt.assert_equal(states["camera_button_count"], 7)
npt.assert_equal(states["plus_button_count"], 3)
npt.assert_equal(states["minus_button_count"], 4)
npt.assert_equal(states["slider_moved_count"], 116)
if not recording:
button.Off()
slider.Off()
# Uncomment below to test the slider and button with analyze
# button.place(scene)
# slider.place(scene)
report = window.analyze_scene(scene)
# import pylab as plt
# plt.imshow(report.labels, origin='lower')
# plt.show()
npt.assert_equal(report.actors, 1)
report = window.analyze_scene(scene)
npt.assert_equal(report.actors, 1)
