Add animation LUT generation script

animation_lut.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+
+from colorsys import hsv_to_rgb
+
+LUT_SIZE = 256
+SATURATION = 0.8
+VALUE = 1
+RESOLUTION = 12     # in bits
+
+print('const LED_Colour_t Animation_ColourLUT[] =')
+print('{')
+for i in range(LUT_SIZE):
+    h = i / LUT_SIZE
+    rgb = hsv_to_rgb(h, SATURATION, VALUE)
+    # Gamma-correct
+    rgb = tuple(pow(x, 2.2) for x in rgb)
+    # Scale to BCM resolution
+    (r, g, b) = tuple(round(2 ** RESOLUTION * x) for x in rgb)
+    print('    {{ .r = {}, .g = {}, .b = {} }},'.format(r, g, b))
+print('};')