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Add a nicer sine based gradient for the LEDs

master
Fred Sundvik 2016-05-29 18:27:32 +03:00
parent 0c3189055f
commit 489288f674
2 changed files with 6 additions and 9 deletions
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13
led_test.c
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@ -89,14 +89,11 @@ static uint8_t crossfade_start_frame[NUM_ROWS][NUM_COLS];
static uint8_t crossfade_end_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) { static uint8_t compute_gradient_color(float t, float index, float num) {
const float target = t * (num - 1.0f); const float two_pi = 2.0f * PI;
const float half_num = num / 2.0f; float normalized_index = (1.0f - index / (num - 1)) * two_pi;
float d = fabs(index - target); float x = t * two_pi + normalized_index;
if (d > half_num) { float v = 0.5 * (cosf(x) + 1.0f);
d = num - d; return (uint8_t)(255.0f * v);
}
d = 1.0f - (d / half_num);
return (uint8_t)(255.0f * d);
} }
bool keyframe_fade_in_all_leds(keyframe_animation_t* animation, visualizer_state_t* state) { bool keyframe_fade_in_all_leds(keyframe_animation_t* animation, visualizer_state_t* state) {

2
ugfx

@ -1 +1 @@
Subproject commit 7d7eeef0ad0f1b28f4fb86ad931cb6774c7b9e81 Subproject commit dc5786acc246fb23503517647c386e43f1bfb247