def test_download_letter_a():
data = examples.download_letter_a()
assert data.n_cells
def _for_landing_page(jupyter_backend='ipygany', **kwargs):
"""Plot the stylized PyVista logo for ipygany.
To be shown on the landing page at index.rst
"""
mesh_letters = logo_letters()
# letter 'P'
p_mesh = mesh_letters['P'].compute_normals(split_vertices=True)
# letter 'y'
y_mesh = mesh_letters['y'].compute_normals(split_vertices=True)
# letter 'V'
v_grid = pyvista.voxelize(mesh_letters['V'], density=0.08)
v_grid_atom = atomize(v_grid)
v_grid_atom['scalars'] = v_grid_atom.points[:, 0]
i_grid = pyvista.voxelize(mesh_letters['i'], density=0.1)
i_mesh = i_grid.extract_surface().triangulate().subdivide(2)
i_mesh = i_mesh.smooth(500)
old_center = np.array(i_mesh.center)
i_mesh.points *= 1.07
i_mesh.points += old_center - np.array(i_mesh.center)
# letter 's'
s_vox = pyvista.voxelize(mesh_letters['s'], density=0.04)
s_cent = s_vox.cell_centers()
pd = pyvista.PolyData(s_cent.points)
sphere = pyvista.Sphere(theta_resolution=9, phi_resolution=9)
s_grid = pd.glyph(factor=0.04, geom=sphere)
# letter 't'
# t_mesh = mesh_letters['t'].subdivide(5)
# t_mesh.flip_normals()
# t_mesh = t_mesh.compute_normals(consistent_normals=True)
# import pyacvd
# clus = pyacvd.Clustering(t_mesh)
# clus.cluster(140)
# t_cmesh = clus.create_mesh()
# import _ as fe
# src = fe.Surface(t_cmesh)
# tgt = fe.Surface(t_mesh)
# src.morph(tgt, settings={'local_with_centroid': True, 'local_steps': 300})
# src.morph(tgt, settings={'local_with_centroid': True, 'local_steps': 300})
# t_mesh = t_cmesh.extract_all_edges().tube(radius=0.005, n_sides=4)
# t_mesh.extract_surface().save(...)
t_mesh_filename = os.path.join(THIS_PATH, 't_mesh.ply')
t_mesh = pyvista.read(t_mesh_filename)
# letter 'a'
grid = examples.download_letter_a()
grid.points[:, 0] += (mesh_letters['a'].center[0] - grid.center[0])
# select some cells from grid
cells = grid.cells.reshape(-1, 5)
mask = grid.points[cells[:, 1:], 2] < 0.2
mask = mask.all(1)
a_part = grid.extract_cells(mask)
plotter = pyvista.Plotter()
plotter.add_mesh(p_mesh, color='#376fa0')
plotter.add_mesh(y_mesh, color='#ffd040')
vista = v_grid_atom.merge([i_mesh, s_grid, t_mesh, a_part])
vista['xdist'] = vista.points[:, 0]
plotter.add_mesh(vista, cmap='viridis')
# cpos = None
# cpos = [(-0.9785294154224577, 1.2712499319005408, 10.965733716449193),
# (2.553950615449191, 0.34145688392081264, 0.06127122762851659),
# (0.019308531920309947, 0.996708840795678, -0.07873161547192065)]
# cpos = [(0.9060226106040606, 0.7752122028710583, 5.148283455883558),
# (2.553950615449191, 0.34145688392081264, 0.06127122762851659),
# (0.019308531920309943, 0.9967088407956779, -0.07873161547192063)]
# cpos = [(0.6861237002108157, 0.7572283207509382, 5.078581054505883),
# (2.334051705055946, 0.3234730018006926, -0.008431173749159387),
# (0.019308531920309947, 0.996708840795678, -0.07873161547192065)]
if jupyter_backend == 'ipygany':
x = 2.7
cpos = [(x, 0.306, 5), (x, 0.306, 0.15), (0.0, 1.0, 0.0)]
text = text_3d("I'm interactive!", depth=0.1)
text.points *= 0.15
text.translate([4, -0.4, 0])
plotter.add_mesh(text, color='black')
else:
cpos = [(0.9060226106040606, 0.7752122028710583, 5.148283455883558),
(2.553950615449191, 0.34145688392081264, 0.06127122762851659),
(0.019308531920309943, 0.9967088407956779,
-0.07873161547192063)]
plotter.background_color = 'white'
plotter.remove_scalar_bar()
return plotter.show(cpos=cpos,
jupyter_backend=jupyter_backend,
jupyter_kwargs=kwargs)
cpos = [(6.192871661244108, 5.687542355343226, -4.95345468836544), (0.48853358141600634, 1.2019347531215714, 0.1656178278582367), (-0.40642070472687936, 0.8621356761976646, 0.30256286387543047)] centers = mesh.cell_centers() p = pv.Plotter() p.add_mesh(mesh, show_edges=True, line_width=1) p.add_mesh(centers, color="r", point_size=8.0, render_points_as_spheres=True) p.show(cpos=cpos) ############################################################################### # We can also do this for full 3D meshes. grid = examples.download_letter_a() cpos = [(2.704583323659036, 0.7822568412034183, 1.7251126717482546), (3.543391913452799, 0.31117673768140197, 0.16407006760146028), (0.1481171795711516, 0.96599698246102, -0.2119224645762945)] centers = grid.cell_centers() p = pv.Plotter() p.add_mesh(grid, show_edges=True, opacity=0.5, line_width=1) p.add_mesh(centers, color="r", point_size=8.0, render_points_as_spheres=True) p.show(cpos=cpos) ###############################################################################
def plot_logo(window_size=None,
off_screen=None,
screenshot=None,
cpos=None,
**kwargs):
"""Plot the stylized PyVista logo.
Examples
--------
>>> from pyvista import demos
>>> cpos = demos.plot_logo()
"""
# initialize plotter
if window_size is None:
window_size = [960, 400]
plotter = pyvista.Plotter(window_size=window_size, off_screen=off_screen)
mesh_letters = logo_letters()
# letter 'P'
p_mesh = mesh_letters['P'].compute_normals(split_vertices=True)
plotter.add_mesh(p_mesh, color='#376fa0', smooth_shading=True)
# letter 'y'
p_mesh = mesh_letters['y'].compute_normals(split_vertices=True)
plotter.add_mesh(p_mesh, color='#ffd040', smooth_shading=True)
# letter 'V'
v_grid = pyvista.voxelize(mesh_letters['V'], density=0.08)
v_grid_atom = atomize(v_grid)
v_grid_atom['scalars'] = v_grid_atom.points[:, 0]
plotter.add_mesh(v_grid_atom,
scalars='scalars',
show_edges=True,
cmap='winter',
show_scalar_bar=False)
# letter 'i'
i_grid = pyvista.voxelize(mesh_letters['i'], density=0.1)
plotter.add_mesh(i_grid.extract_surface(),
style='points',
color='r',
render_points_as_spheres=True,
point_size=8)
plotter.add_mesh(i_grid, style='wireframe', color='k', line_width=4)
# letter 's'
mesh = mesh_letters['s']
scalars = mesh.points[:, 0]
plotter.add_mesh(mesh,
scalars=scalars,
style='wireframe',
color='w',
show_edges=True,
line_width=2,
cmap='gist_heat',
backface_culling=True,
render_lines_as_tubes=True)
# letter 't'
mesh = mesh_letters['t']
scalars = mesh.points[:, 0]
plotter.add_mesh(mesh,
scalars=scalars,
show_edges=True,
cmap='autumn',
lighting=True)
# letter 'a'
grid = examples.download_letter_a()
grid.points[:, 0] += (mesh_letters['a'].center[0] - grid.center[0])
# select some cells from grid
cells = grid.cells.reshape(-1, 5)
mask = grid.points[cells[:, 1:], 2] < 0.2
mask = mask.all(1)
a_part = grid.extract_cells(mask)
cells = a_part.cells.reshape(-1, 5)
scalars = grid.points[cells[:, 1], 1]
plotter.add_mesh(a_part, scalars=scalars, show_edges=True, cmap='Greens')
# finalize plot and show it
plotter.set_background(kwargs.pop('background', 'white'))
if cpos is None:
cpos = [(0.9060226106040606, 0.7752122028710583, 5.148283455883558),
(2.553950615449191, 0.34145688392081264, 0.06127122762851659),
(0.019308531920309943, 0.9967088407956779,
-0.07873161547192063)]
plotter.camera_position = cpos
plotter.remove_scalar_bar()
if screenshot: # pragma: no cover
plotter.show(cpos=cpos, auto_close=False)
plotter.screenshot(screenshot, True)
cpos_final = plotter.camera_position
plotter.close()
return cpos_final
else:
return plotter.show(cpos=cpos, **kwargs)
def plot_logo(window_size=None,
off_screen=None,
screenshot=None,
cpos=None,
just_return_plotter=False,
show_note=False,
**kwargs):
"""Plot the stylized PyVista logo.
Examples
--------
>>> from pyvista import demos
>>> cpos = demos.plot_logo()
"""
# initialize plotter
if window_size is None:
window_size = [960, 400]
plotter = pyvista.Plotter(window_size=window_size, off_screen=off_screen)
mesh_letters = logo_letters()
# letter 'P'
p_mesh = mesh_letters['P'].compute_normals(split_vertices=True)
p_mesh.flip_normals()
plotter.add_mesh(p_mesh, color='#376fa0', smooth_shading=True)
# letter 'y'
y_mesh = mesh_letters['y'].compute_normals(split_vertices=True)
y_mesh.flip_normals()
plotter.add_mesh(y_mesh, color='#ffd040', smooth_shading=True)
# letter 'V'
v_grid = pyvista.voxelize(mesh_letters['V'], density=0.08)
v_grid_atom = atomize(v_grid)
v_grid_atom['scalars'] = v_grid_atom.points[:, 0]
v_grid_atom_surf = v_grid_atom.extract_surface()
faces = v_grid_atom_surf.faces.reshape(-1, 5)
faces[:, 1:] = faces[:, 1:][:, ::-1]
v_grid_atom_surf.faces = faces
plotter.add_mesh(v_grid_atom_surf,
scalars='scalars',
show_edges=True,
cmap='winter',
show_scalar_bar=False)
# letter 'i'
i_grid = pyvista.voxelize(mesh_letters['i'], density=0.1)
plotter.add_mesh(i_grid.extract_surface(),
style='points',
color='r',
render_points_as_spheres=True,
point_size=14)
plotter.add_mesh(i_grid, style='wireframe', color='k', line_width=4)
# letter 's'
mesh = mesh_letters['s']
mesh['scalars'] = mesh.points[:, 0]
plotter.add_mesh(mesh,
scalars='scalars',
style='wireframe',
show_edges=True,
line_width=2,
cmap='gist_heat',
backface_culling=True,
render_lines_as_tubes=True,
show_scalar_bar=False)
# letter 't'
mesh = mesh_letters['t'].clean().compute_normals()
# strange behavior with pythreejs
if pyvista.global_theme.jupyter_backend == 'pythreejs':
mesh.flip_normals()
scalars = mesh.points[:, 0]
plotter.add_mesh(mesh,
scalars=scalars,
show_edges=True,
cmap='autumn',
show_scalar_bar=False)
# letter 'a'
grid = examples.download_letter_a()
grid.points[:, 0] += (mesh_letters['a'].center[0] - grid.center[0])
# select some cells from grid
cells = grid.cells.reshape(-1, 5)
mask = grid.points[cells[:, 1:], 2] < 0.2
mask = mask.all(1)
a_part = grid.extract_cells(mask)
cells = a_part.cells.reshape(-1, 5)
scalars = grid.points[cells[:, 1], 1]
plotter.add_mesh(a_part,
scalars=scalars,
show_edges=True,
cmap='Greens',
show_scalar_bar=False)
if show_note:
text = text_3d("You can move me!", depth=0.1)
text.points *= 0.1
text.translate([4.0, -0.3, 0])
plotter.add_mesh(text, color='black')
# finalize plot and show it
plotter.set_background(kwargs.pop('background', 'white'))
plotter.camera_position = 'xy'
if 'zoom' in kwargs:
plotter.camera.zoom(kwargs.pop('zoom'))
# plotter.remove_scalar_bar()
plotter.enable_anti_aliasing()
if just_return_plotter:
return plotter
if screenshot: # pragma: no cover
plotter.show(cpos=cpos, auto_close=False)
plotter.screenshot(screenshot, True)
cpos_final = plotter.camera_position
plotter.close()
return cpos_final
else:
return plotter.show(cpos=cpos, **kwargs)