Make digital rain RGB matrix effect #define configurable.

1 files changed, 6 insertions, 2 deletions

diff --git a/quantum/rgb_matrix.c b/quantum/rgb_matrix.c
index b282284a1..f0c2ddfdf 100644
--- a/quantum/rgb_matrix.c
+++ b/quantum/rgb_matrix.c
@@ -50,6 +50,11 @@ rgb_config_t rgb_matrix_config;
     #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 255
 #endif
 
+#ifndef RGB_DIGITAL_RAIN_DROPS
+    // lower the number for denser effect/wider keyboard
+    #define RGB_DIGITAL_RAIN_DROPS 24
+#endif
+
 bool g_suspend_state = false;
 
 // Global tick at 20 Hz
@@ -466,7 +471,6 @@ 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;
@@ -481,7 +485,7 @@ void rgb_matrix_digital_rain( const bool initialize ) {
     }
     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) {
+            if (row == 0 && drop == 0 && rand() < RAND_MAX / RGB_DIGITAL_RAIN_DROPS) {
                 // top row, pixels have just fallen and we're
                 // making a new rain drop in this column
                 map[col][row] = max_intensity;