Render a depth image

Plot a depth image as viewed from a camera overlooking the “hills” example mesh.

# sphinx_gallery_thumbnail_number = 2
import numpy as np
import pyvista as pv
import matplotlib.pyplot as plt
from pyvista import examples

# Load an interesting example of geometry
mesh = examples.load_random_hills()

# Establish geometry within a pv.Plotter()
p = pv.Plotter()
p.add_mesh(mesh, color=True)
p.show()

Out:

[(32.59238058247114, 42.59238058247112, 36.404715418000464),
 (0.0, 9.99999999999999, 3.8123348355293274),
 (0.0, 0.0, 1.0)]

Record depth image without and with a custom fill value

zval = p.get_image_depth()
zval_filled_by_42s = p.get_image_depth(fill_value=42.0)

Visualize depth images

plt.figure()
plt.imshow(zval)
plt.colorbar(label='Distance to Camera')
plt.title('Depth image')
plt.xlabel('X Pixel')
plt.ylabel('Y Pixel')
plt.show()

Out:

/home/travis/build/pyvista/pyvista/examples/02-plot/image_depth.py:34: UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure.
  plt.show()

plt.figure()
plt.imshow(zval_filled_by_42s)
plt.title('Depth image (custom fill_value)')
plt.colorbar(label='Distance to Camera')
plt.xlabel('X Pixel')
plt.ylabel('Y Pixel')
plt.show()

Out:

/home/travis/build/pyvista/pyvista/examples/02-plot/image_depth.py:43: UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure.
  plt.show()