Longitudinal and Latitudinal Lines

This example demonstrates how to add longitudinal and latitudinal lines to a Plot3d instance. These PolyData objects can be used as reference lines for the grid, or as a visual aid to indicate the orientation of the scene.

from pyvisual import Plot3d

Create a Plot3d instance and add the sun (a “reference” sphere, centered at the origin, with radius 1 \(R_\odot\)) to the scene. Using the default arguments for the add_latitudinal_lines() and add_longitudinal_lines() methods creates lines every 15° and 30° (respectively), at 1.01 \(R_\odot\).

plotter = Plot3d()
plotter.add_sun()
plotter.add_latitudinal_lines()
plotter.add_longitudinal_lines()
plotter.show()

Static Scene

Interactive Scene

Alternatively, you can create denser or sparser lines by changing the lat_deg and lon_deg arguments, or add lines at a different radius by changing the radius argument.

plotter = Plot3d()
plotter.add_sun()
plotter.add_latitudinal_lines(lat_deg=10, radius=2.5)
plotter.add_longitudinal_lines(lon_deg=10, radius=2.5)
plotter.show()

Static Scene

Interactive Scene