From 6b55403334543492e691f84759f36f2698848764 Mon Sep 17 00:00:00 2001
From: fruchti <fruchti@gvfr.de>
Date: Sun, 4 Oct 2020 22:43:42 +0200
Subject: [PATCH] Add animation LUT generation script

---
 animation_lut.py | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100755 animation_lut.py

diff --git a/animation_lut.py b/animation_lut.py
new file mode 100755
index 0000000..0ad7c04
--- /dev/null
+++ b/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('};')