diff options
| -rw-r--r-- | led_test.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/led_test.c b/led_test.c index ed65a0baa5..d358ef81eb 100644 --- a/led_test.c +++ b/led_test.c @@ -86,10 +86,13 @@ static uint8_t crossfade_start_frame[NUM_ROWS][NUM_COLS]; static uint8_t crossfade_end_frame[NUM_ROWS][NUM_COLS]; static uint8_t compute_gradient_color(float t, float index, float num) { - float d = fabs(index - t); - if (d > num / 2.0f) { + const float target = t * (num - 1.0f); + const float half_num = num / 2.0f; + float d = fabs(index - target); + if (d > half_num) { d = num - d; } + d = 1.0f - (d / half_num); return (uint8_t)(255.0f * d); } |