Adding shifting jack-o-lantern eyes example

docs/examples.rst

@@ -6,3 +6,21 @@ Ensure your device works with this simple test.
 .. literalinclude:: ../examples/monsterm4sk_simpletest.py
     :caption: examples/monsterm4sk_simpletest.py
     :linenos:
+
+Rainbow Stars
+-------------
+
+Groovy color changing stars eyes.
+
+.. literalinclude:: ../examples/monsterm4sk_rainbow_stars.py
+    :caption: examples/monsterm4sk_rainbow_stars.py
+    :linenos:
+
+Pumpkin Shifting Eyes
+---------------------
+
+Triangle Jack-O-Lantern eyes that shift back and forth.
+
+.. literalinclude:: ../examples/monsterm4sk_pumpkin_shifting_eyes.py
+    :caption: examples/monsterm4sk_pumpkin_shifting_eyes.py
+    :linenos:

examples/monsterm4sk_pumpkin_shifting_eyes.py

@@ -0,0 +1,102 @@
+# SPDX-FileCopyrightText: 2020 Foamyguy, written for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+"""
+CircuitPython example for Monster M4sk.
+
+Draws a yellow triangle on each screen as Jack-O-Lantern eyes.
+The eyes shift back and forth from left to right.
+"""
+
+import time
+import board
+import displayio
+import adafruit_imageload
+import adafruit_monsterm4sk
+
+SCREEN_SIZE = 240
+IMAGE_SIZE = 173
+
+# Create a bitmap for the background 10x10 pixels
+bg_color_pixel = displayio.Bitmap(10, 10, 1)
+
+# Create a two color palette
+bg_palette = displayio.Palette(2)
+bg_palette[0] = 0xFF7700  # orange
+
+bg_color_pixel.fill(0)  # fill orange
+
+# Create a TileGrid for the orange background
+bg_left_tile_grid = displayio.TileGrid(bg_color_pixel, pixel_shader=bg_palette)
+bg_right_tile_grid = displayio.TileGrid(bg_color_pixel, pixel_shader=bg_palette)
+
+# Create background groups scaled 24x to match screen size
+bg_left_group = displayio.Group(scale=24)
+bg_right_group = displayio.Group(scale=24)
+
+# add the background tilegrids to the scaled groups
+bg_left_group.append(bg_left_tile_grid)
+bg_right_group.append(bg_right_tile_grid)
+
+# load the eye image
+eye_image, eye_palette = adafruit_imageload.load(
+    "/small_triangle_eye.bmp", bitmap=displayio.Bitmap, palette=displayio.Palette
+)
+
+# Create a TileGrid to hold the bitmap for each eye
+right_pumkin_eye_tilegrid = displayio.TileGrid(eye_image, pixel_shader=eye_palette)
+left_pumkin_eye_tilegrid = displayio.TileGrid(eye_image, pixel_shader=eye_palette)
+
+# initialize the monster m4sk hardware
+i2c_bus = board.I2C()
+mask = adafruit_monsterm4sk.MonsterM4sk(i2c=i2c_bus)
+
+# left eye group setup
+left_group = displayio.Group(max_size=4)
+mask.left_display.show(left_group)
+
+# right eye group setup
+right_group = displayio.Group(max_size=4)
+mask.right_display.show(right_group)
+
+# Add orange backgrounds to both groups
+right_group.append(bg_right_group)
+left_group.append(bg_left_group)
+
+# add triangle eyes to both groups
+right_group.append(right_pumkin_eye_tilegrid)
+left_group.append(left_pumkin_eye_tilegrid)
+
+# centered vertically
+right_pumkin_eye_tilegrid.y = (SCREEN_SIZE - IMAGE_SIZE) // 2
+left_pumkin_eye_tilegrid.y = (SCREEN_SIZE - IMAGE_SIZE) // 2
+
+while True:
+    # move the eyes to the right
+    for i in range(0, 240 - 173, 5):
+        right_pumkin_eye_tilegrid.x = i
+        left_pumkin_eye_tilegrid.x = i
+        time.sleep(0.01)
+
+    time.sleep(2)  # wait 2 seconds
+
+    # move the eyes to the left
+    for i in range(0, 240 - 173, 5):
+        right_pumkin_eye_tilegrid.x -= 5
+        left_pumkin_eye_tilegrid.x -= 5
+        time.sleep(0.01)
+
+    time.sleep(2)  # wait 2 seconds
+
+    if mask.boop:
+        pass
+
+    if mask.buttons["S9"]:
+        pass
+
+    if mask.buttons["S10"]:
+        pass
+
+    if mask.buttons["S11"]:
+        pass

examples/small_triangle_eye.bmp.license

@@ -0,0 +1,3 @@
+# SPDX-FileCopyrightText: 2020 Foamyguy, created for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense