Add hurricane tracker code

PyPortal_Hurricane_Tracker/hurricane_tracker.py

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+import time
+import math
+import board
+import displayio
+import terminalio
+from simpleio import map_range
+import adafruit_imageload
+from adafruit_pyportal import PyPortal
+from adafruit_display_text.label import Label
+from adafruit_display_shapes.line import Line
+
+# --| User Config |---------------------------------------------------
+UPDATE_RATE = 60  # minutes
+MAX_STORMS = 3  # limit storms
+NAME_COLOR = 0xFFFFFF  # label text color
+NAME_BG_COLOR = 0x000000  # label background color
+ARROW_COLOR = 0x0000FF  # movement direction arrow color
+ARROW_LENGTH = 15  # movement direction arrow length
+LAT_RANGE = (45, 5)  # set to match map
+LON_RANGE = (-100, -40)  # set to match map
+# --------------------------------------------------------------------
+
+# setup pyportal
+pyportal = PyPortal(
+    url="https://www.nhc.noaa.gov/CurrentStorms.json",
+    json_path=["activeStorms"],
+    status_neopixel=board.NEOPIXEL,
+    default_bg="/map.bmp",
+)
+
+# setup display group for storms
+icons_bmp, icons_pal = adafruit_imageload.load(
+    "/storm_icons.bmp", bitmap=displayio.Bitmap, palette=displayio.Palette
+)
+for i, c in enumerate(icons_pal):
+    if c == 0xFFFF00:
+        icons_pal.make_transparent(i)
+storm_icons = displayio.Group(max_size=MAX_STORMS)
+pyportal.splash.append(storm_icons)
+STORM_CLASS = ("TD", "TS", "HU")
+
+# setup info label
+info_update = Label(
+    terminalio.FONT,
+    text="1984-01-01T00:00:00.000Z",
+    color=NAME_COLOR,
+    background_color=NAME_BG_COLOR,
+)
+info_update.anchor_point = (0.0, 1.0)
+info_update.anchored_position = (10, board.DISPLAY.height - 10)
+pyportal.splash.append(info_update)
+
+# these are need for lat/lon to screen x/y mapping
+VIRTUAL_WIDTH = board.DISPLAY.width * 360 / (LON_RANGE[1] - LON_RANGE[0])
+VIRTUAL_HEIGHT = board.DISPLAY.height * 360 / (LAT_RANGE[0] - LAT_RANGE[1])
+Y_OFFSET = math.radians(LAT_RANGE[0])
+Y_OFFSET = math.tan(math.pi / 4 + Y_OFFSET / 2)
+Y_OFFSET = math.log(Y_OFFSET)
+Y_OFFSET = (VIRTUAL_WIDTH * Y_OFFSET) / (2 * math.pi)
+Y_OFFSET = VIRTUAL_HEIGHT / 2 - Y_OFFSET
+
+
+def update_display():
+    # clear out existing icons
+    while len(storm_icons):
+        _ = storm_icons.pop()
+
+    # get latest storm data
+    try:
+        storm_data = pyportal.fetch()
+    except RuntimeError:
+        return
+    print("Number of storms:", len(storm_data))
+
+    # parse the storm data
+    for storm in storm_data:
+        # don't exceed max
+        if len(storm_icons) >= MAX_STORMS:
+            continue
+        # get lat/lon
+        lat = storm["latitudeNumeric"]
+        lon = storm["longitudeNumeric"]
+        # check if on map
+        if (
+            not LAT_RANGE[0] >= lat >= LAT_RANGE[1]
+            or not LON_RANGE[0] <= lon <= LON_RANGE[1]
+        ):
+            continue
+        # OK, let's make a group for all the graphics
+        storm_gfx = displayio.Group(max_size=3)  # icon + label + arrow
+        # convert to sreen coords
+        x = int(map_range(lon, LON_RANGE[0], LON_RANGE[1], 0, board.DISPLAY.width - 1))
+        y = math.radians(lat)
+        y = math.tan(math.pi / 4 + y / 2)
+        y = math.log(y)
+        y = (VIRTUAL_WIDTH * y) / (2 * math.pi)
+        y = VIRTUAL_HEIGHT / 2 - y
+        y = int(y - Y_OFFSET)
+        # icon type
+        if storm["classification"] in STORM_CLASS:
+            storm_type = STORM_CLASS.index(storm["classification"])
+        else:
+            storm_type = 0
+        # create storm icon
+        icon = displayio.TileGrid(
+            icons_bmp,
+            pixel_shader=icons_pal,
+            width=1,
+            height=1,
+            tile_width=16,
+            tile_height=16,
+            default_tile=storm_type,
+            x=x - 8,
+            y=y - 8,
+        )
+        # add storm icon
+        storm_gfx.append(icon)
+        # add a label
+        name = Label(
+            terminalio.FONT,
+            text=storm["name"],
+            color=NAME_COLOR,
+            background_color=NAME_BG_COLOR,
+        )
+        name.anchor_point = (0.0, 1.0)
+        name.anchored_position = (x + 8, y - 8)
+        storm_gfx.append(name)
+        # add direction arrow
+        angle = math.radians(storm["movementDir"])
+        xd = x + int(ARROW_LENGTH * math.sin(angle))
+        yd = y - int(ARROW_LENGTH * math.cos(angle))
+        arrow = Line(x, y, xd, yd, color=ARROW_COLOR)
+        storm_gfx.append(arrow)
+        # add the storm graphics
+        storm_icons.append(storm_gfx)
+        # update time
+        info_update.text = storm["lastUpdate"]
+        # debug
+        print(
+            "{} @ {},{}".format(
+                storm["name"], storm["latitudeNumeric"], storm["longitudeNumeric"]
+            )
+        )
+
+    # no storms? at least say something
+    if not len(storm_icons):
+        print("No storms in map area.")
+        storm_icons.append(
+            Label(
+                terminalio.FONT,
+                scale=4,
+                x=50,
+                y=110,
+                text="NO STORMS\n IN AREA",
+                color=NAME_COLOR,
+                background_color=NAME_BG_COLOR,
+            )
+        )
+
+
+# --------------------------------------------------------------------
+# M A I N
+# --------------------------------------------------------------------
+update_display()
+last_update = time.monotonic()
+while True:
+    now = time.monotonic()
+    if now - last_update > UPDATE_RATE * 60:
+        print("Updating...")
+        update_display()
+        last_update = now