More explicitly control the mapping between acceleration and RGB

Author: dcbriccetti

examples/circuitplayground_acceleration_neopixels.py

@@ -4,6 +4,8 @@
 values to light up the NeoPixels based on those acceleration values."""
 from adafruit_circuitplayground.express import cpx
 
+cpx.pixels.brightness = 0.2  # Adjust as desired, between 0 and 1
+
 # Main loop gets x, y and z axis acceleration, prints the values, and turns on
 # red, green and blue, at levels related to the x, y and z values.
 while True:
@@ -13,6 +15,17 @@
         cpx.pixels.fill((0, 0, 0))
         continue
     else:
-        x, y, z = cpx.acceleration
-        print((x, y, z))
-        cpx.pixels.fill((abs(int(x)), abs(int(y)), abs(int(z))))
+        def color_amount(accel_component):
+            """Convert acceleration component (x, y, or z) to color amount (r, g, or b)"""
+            standard_gravity = 9.81  # Acceleration (m/s²) due to gravity at the earth’s surface
+            accel_magnitude = abs(accel_component)                      # Ignore the direction
+            constrained_accel = min(accel_magnitude, standard_gravity)  # Constrain values
+            normalized_accel = constrained_accel / standard_gravity     # Convert to 0–1
+            return round(normalized_accel * 255)                        # Convert to 0–255
+
+        # Get the acceleration, reducing the precision to match our needs and for display
+        acceleration = [round(a, 2) for a in cpx.acceleration]
+        # Call color_amount for each acceleration part
+        rgb_amounts = tuple(map(color_amount, acceleration))
+        print(acceleration, '->', rgb_amounts)
+        cpx.pixels.fill(rgb_amounts)