Add Pixel Rain RGB Matrix effect (#14155)

* Add Pixel animation header file

* Add Pixel animation to documentation

* Add Pixel animation to core include file

* Remove unintended spaces

* Remove seeding of PRNG

* Increase frequency of lit keys

Co-authored-by: filterpaper <filterpaper@localhost>

1 files changed, 2 insertions, 0 deletions

diff --git a/docs/feature_rgb_matrix.md b/docs/feature_rgb_matrix.md
index cad7c50f1..6370c637a 100644
--- a/docs/feature_rgb_matrix.md
+++ b/docs/feature_rgb_matrix.md
@@ -454,6 +454,7 @@ enum rgb_matrix_effects {
     RGB_MATRIX_HUE_PENDULUM,        // Hue shifts up a slight ammount in a wave to the right, then back to the left
     RGB_MATRIX_HUE_WAVE,            // Hue shifts up a slight ammount and then back down in a wave to the right
     RGB_MATRIX_FRACTAL,             // Single hue fractal filled keys pulsing horizontally out to edges
+    RGB_MATRIX_PIXEL_RAIN,          // Randomly light keys with random hues
 #if define(RGB_MATRIX_FRAMEBUFFER_EFFECTS)
     RGB_MATRIX_TYPING_HEATMAP,      // How hot is your WPM!
     RGB_MATRIX_DIGITAL_RAIN,        // That famous computer simulation
@@ -508,6 +509,7 @@ You can disable a single effect by defining `DISABLE_[EFFECT_NAME]` in your `con
 |`#define DISABLE_RGB_MATRIX_HUE_PENDULUM`              |Disables `RGB_MATRIX_HUE_PENDULUM`             |
 |`#define DISABLE_RGB_MATRIX_HUE_WAVE`                  |Disables `RGB_MATRIX_HUE_WAVE`                 |
 |`#define DISABLE_RGB_MATRIX_FRACTAL`                   |Disables `RGB_MATRIX_FRACTAL`                  |
+|`#define DISABLE_RGB_MATRIX_PIXEL_RAIN `               |Disables `RGB_MATRIX_PIXEL_RAIN `              |
 |`#define DISABLE_RGB_MATRIX_TYPING_HEATMAP`            |Disables `RGB_MATRIX_TYPING_HEATMAP`           |
 |`#define DISABLE_RGB_MATRIX_DIGITAL_RAIN`              |Disables `RGB_MATRIX_DIGITAL_RAIN`             |
 |`#define DISABLE_RGB_MATRIX_SOLID_REACTIVE_SIMPLE`     |Disables `RGB_MATRIX_SOLID_REACTIVE_SIMPLE`    |