"""
========================
Ignoring off-limb pixels
========================

How to not plot off-limb pixels.

By default ``sunkit-pyvista`` plots all pixels in a map, using
`~sunpy.coordinates.screens.SphericalScreen` to
project off-limb pixels on to a spherical screen.

This example shows how off-limb pixels can be ignored altogether.
"""

import astropy.units as u
from astropy.constants import R_sun
from astropy.coordinates import SkyCoord

from sunpy.coordinates import frames

from sunkit_pyvista import SunpyPlotter
from sunkit_pyvista.sample import LOW_RES_AIA_193

###############################################################################
# We will use an AIA 193 image from the sunpy sample data as the base image.

# Start by creating a plotter
plotter = SunpyPlotter()
# Plot a map setting the `assume_spherical_screen` to False
plotter.plot_map(
    LOW_RES_AIA_193,
    clip_interval=[1, 99] * u.percent,
    assume_spherical_screen=False,
)

# Set the camera coordinate to view the plot correctly
camera_coord = SkyCoord(
    0 * u.deg,
    0 * u.deg,
    6 * R_sun,
    frame=frames.HeliographicStonyhurst,
    obstime=LOW_RES_AIA_193.date,
)
plotter.set_camera_coordinate(camera_coord)

plotter.show()