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-rw-r--r--quantum/rgb_matrix.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/quantum/rgb_matrix.c b/quantum/rgb_matrix.c
index 197bc1ac5e..8ad00c37dd 100644
--- a/quantum/rgb_matrix.c
+++ b/quantum/rgb_matrix.c
@@ -510,6 +510,69 @@ void rgb_matrix_jellybean_raindrops( bool initialize ) {
}
}
+void rgb_matrix_digital_rain( const bool initialize ) {
+ // algorithm ported from https://github.com/tremby/Kaleidoscope-LEDEffect-DigitalRain
+ const uint8_t drop_ticks = 28;
+ const uint8_t new_drop_probability = 24;
+ const uint8_t pure_green_intensity = 0xd0;
+ const uint8_t max_brightness_boost = 0xc0;
+ const uint8_t max_intensity = 0xff;
+
+ static uint8_t map[MATRIX_COLS][MATRIX_ROWS] = {{0}};
+ static uint8_t drop = 0;
+
+ if (initialize) {
+ rgb_matrix_set_color_all(0, 0, 0);
+ memset(map, 0, sizeof map);
+ drop = 0;
+ }
+ for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ if (row == 0 && drop == 0 && rand() < RAND_MAX / new_drop_probability) {
+ // top row, pixels have just fallen and we're
+ // making a new rain drop in this column
+ map[col][row] = max_intensity;
+ }
+ else if (map[col][row] > 0 && map[col][row] < max_intensity) {
+ // neither fully bright nor dark, decay it
+ map[col][row]--;
+ }
+ // set the pixel colour
+ uint8_t led, led_count;
+ map_row_column_to_led(row, col, &led, &led_count);
+
+ if (map[col][row] > pure_green_intensity) {
+ const uint8_t boost = (uint8_t) ((uint16_t) max_brightness_boost
+ * (map[col][row] - pure_green_intensity) / (max_intensity - pure_green_intensity));
+ rgb_matrix_set_color(led, boost, max_intensity, boost);
+ }
+ else {
+ const uint8_t green = (uint8_t) ((uint16_t) max_intensity * map[col][row] / pure_green_intensity);
+ rgb_matrix_set_color(led, 0, green, 0);
+ }
+ }
+ }
+ if (++drop > drop_ticks) {
+ // reset drop timer
+ drop = 0;
+ for (uint8_t row = MATRIX_ROWS - 1; row > 0; row--) {
+ for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+ // if ths is on the bottom row and bright allow decay
+ if (row == MATRIX_ROWS - 1 && map[col][row] == max_intensity) {
+ map[col][row]--;
+ }
+ // check if the pixel above is bright
+ if (map[col][row - 1] == max_intensity) {
+ // allow old bright pixel to decay
+ map[col][row - 1]--;
+ // make this pixel bright
+ map[col][row] = max_intensity;
+ }
+ }
+ }
+ }
+}
+
void rgb_matrix_multisplash(void) {
// if (g_any_key_hit < 0xFF) {
HSV hsv = { .h = rgb_matrix_config.hue, .s = rgb_matrix_config.sat, .v = rgb_matrix_config.val };
@@ -685,6 +748,9 @@ void rgb_matrix_task(void) {
case RGB_MATRIX_JELLYBEAN_RAINDROPS:
rgb_matrix_jellybean_raindrops( initialize );
break;
+ case RGB_MATRIX_DIGITAL_RAIN:
+ rgb_matrix_digital_rain( initialize );
+ break;
#ifdef RGB_MATRIX_KEYPRESSES
case RGB_MATRIX_SOLID_REACTIVE:
rgb_matrix_solid_reactive();