def pyvista_render_window():
"""
Allow to download and create a more complex example easily
"""
from pyvista import examples
sphere = pv.Sphere() #test actor
globe = examples.load_globe() #test texture
head = examples.download_head() #test volume
uniform = examples.load_uniform() #test structured grid
scalars = sphere.points[:, 2]
sphere.point_arrays['test'] = scalars #allow to test scalars
sphere.set_active_scalars('test')
uniform.set_active_scalars("Spatial Cell Data")
#test datasetmapper
threshed = uniform.threshold_percent([0.15, 0.50], invert=True)
bodies = threshed.split_bodies()
mapper = vtk.vtkCompositePolyDataMapper2()
mapper.SetInputDataObject(0, bodies)
multiblock = vtk.vtkActor()
multiblock.SetMapper(mapper)
pl = pv.Plotter()
pl.add_mesh(globe)
pl.add_mesh(sphere)
pl.add_mesh(uniform)
pl.add_actor(multiblock)
pl.add_volume(head)
return pl.ren_win
def test_download_head():
data = examples.download_head()
assert data.n_points
###############################################################################
# You can also use a custom opacity mapping
opacity = [0, 0, 0, 0.1, 0.3, 0.6, 1]
p = pv.Plotter()
p.add_volume(vol, cmap="viridis", opacity=opacity)
p.camera_position = cpos
p.show()
###############################################################################
# Cool Volume Examples
# ++++++++++++++++++++
#
# Here are a few more cool volume rendering examples
head = examples.download_head()
p = pv.Plotter()
p.add_volume(head, cmap="cool", opacity="sigmoid_6")
p.camera_position = [(-228.0, -418.0, -158.0), (94.0, 122.0, 82.0),
(-0.2, -0.3, 0.9)]
p.show()
###############################################################################
bolt_nut = examples.download_bolt_nut()
p = pv.Plotter()
p.add_volume(bolt_nut, cmap="coolwarm", opacity="sigmoid_5")
p.show()