~~~~~~~~~~~~~~~~~~~~~~~~~ Compute normals on a surface. """ # sphinx_gallery_thumbnail_number = 2 from pyvista import examples import numpy as np ############################################################################### # Computing the normals of a surface is quite easy using # :class:`pyvista.PolyData`'s :func:`pyvista.PolyDataFilters.compute_normals` # method. mesh = examples.download_topo_global() mesh.plot(cmap="gist_earth", show_scalar_bar=False) ############################################################################### # Now we have a surface dataset of the globe loaded - unfortunately, the # dataset shows the globe with a uniform radius which hides topographic relief. # Using :func:`pyvista.PolyData.compute_normals`, we can compute the normal # vectors on the globe at all points in the dataset, then use the values given # in the dataset to warp the surface in the normals direction to create some # exaggerated topographic relief. # Compute the normals in-place and use them to warp the globe mesh.compute_normals(inplace=True) # this activates the normals as well # Now use those normals to warp the surface warp = mesh.warp_by_scalar(factor=0.5e-5)
"""
Background Image
~~~~~~~~~~~~~~~~
Add a background image with ``add_background_image``
"""
import pyvista as pv
from pyvista import examples
###############################################################################
# Plot an airplane with the map of the earth in the background
earth_alt = examples.download_topo_global()
pl = pv.Plotter()
actor = pl.add_mesh(examples.load_airplane(), smooth_shading=True)
# pl.add_background_image(examples.mapfile)
pl.plot()
###############################################################################
# Plot several earth related plots
pl = pv.Plotter(shape=(2, 2))
pl.subplot(0, 0)
pl.add_text('Earth Visible as Map')
pl.add_background_image(examples.mapfile, as_global=False)
pl.subplot(0, 1)
pl.add_text('Earth Altitude')
actor = pl.add_mesh(earth_alt, cmap='gist_earth')
def __init__(self):
self._example_data = examples.download_topo_global()
_ExampleLoader.__init__(self)