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#!/usr/bin/env python3
# Use the proper idiom in the main module ...
# NOTE: See https://docs.python.org/3.11/library/multiprocessing.html#the-spawn-and-forkserver-start-methods
if __name__ == "__main__":
# Import standard modules ...
import os
import shutil
# Import special modules ...
try:
import cartopy
cartopy.config.update(
{
"cache_dir" : os.path.expanduser("~/.local/share/cartopy_cache"),
}
)
except:
raise Exception("\"cartopy\" is not installed; run \"pip install --user Cartopy\"") from None
try:
import matplotlib
matplotlib.rcParams.update(
{
"backend" : "Agg", # NOTE: See https://matplotlib.org/stable/gallery/user_interfaces/canvasagg.html
"figure.dpi" : 300,
"figure.figsize" : (9.6, 7.2), # NOTE: See https://github.com/Guymer/misc/blob/main/README.md#matplotlib-figure-sizes
"font.size" : 8,
}
)
import matplotlib.pyplot
except:
raise Exception("\"matplotlib\" is not installed; run \"pip install --user matplotlib\"") from None
# Import my modules ...
try:
import pyguymer3
import pyguymer3.geo
import pyguymer3.image
import pyguymer3.media
except:
raise Exception("\"pyguymer3\" is not installed; you need to have the Python module from https://github.com/Guymer/PyGuymer3 located somewhere in your $PYTHONPATH") from None
# **************************************************************************
# Make sure that the output folder exists ...
if not os.path.exists("png"):
os.mkdir("png")
# Initialize list ...
frames = []
# Loop over longitudes ...
for ilon in range(-180, 180):
# Deduce longitude ...
lon = float(ilon) # [°]
# Deduce filename, append it to list and skip this longitude if it
# already exists ...
frame = f"png/addMapUnderlay_animation_lon={lon:+08.3f}.png"
frames.append(frame)
if os.path.exists(frame):
continue
print(f"Making \"{frame}\" ...")
# Create figure ...
fg = matplotlib.pyplot.figure(figsize = (7.2, 7.2))
# Create axis ...
ax = fg.add_subplot(
projection = cartopy.crs.Orthographic(
central_longitude = lon,
central_latitude = 51.5,
)
)
# Configure axis ...
ax.set_global()
pyguymer3.geo.add_map_underlay(ax, cultural = False, linewidth = 0.0, resolution = "50m")
# Configure figure ...
fg.tight_layout()
# Save figure ...
fg.savefig(frame)
matplotlib.pyplot.close(fg)
# Optimize PNG ...
pyguymer3.image.optimize_image(frame, strip = True)
# **************************************************************************
print("Making \"addMapUnderlay_animation.mp4\" ...")
# Save 25fps MP4 ...
vname = pyguymer3.media.images2mp4(
frames,
)
shutil.move(vname, "addMapUnderlay_animation.mp4")
# **************************************************************************
print("Making \"addMapUnderlay_animation.webp\" ...")
# Save 25fps WEBP ...
pyguymer3.media.images2webp(
frames,
"addMapUnderlay_animation.webp",
strip = True,
)
# **************************************************************************
# Set maximum sizes ...
# NOTE: By inspection, the PNG frames are 2,160 px tall/wide.
maxSizes = [512, 1024, 2048] # [px]
# Loop over maximum sizes ...
for maxSize in maxSizes:
print(f"Making \"addMapUnderlay_animation{maxSize:04d}px.mp4\" ...")
# Save 25fps MP4 ...
vname = pyguymer3.media.images2mp4(
frames,
screenWidth = maxSize,
screenHeight = maxSize,
)
shutil.move(vname, f"addMapUnderlay_animation{maxSize:04d}px.mp4")
# **********************************************************************
print(f"Making \"addMapUnderlay_animation{maxSize:04d}px.webp\" ...")
# Save 25fps WEBP ...
pyguymer3.media.images2webp(
frames,
f"addMapUnderlay_animation{maxSize:04d}px.webp",
screenWidth = maxSize,
screenHeight = maxSize,
strip = True,
)
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