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-rw-r--r--quantum/rgb_matrix/animations/digital_rain_anim.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/quantum/rgb_matrix/animations/digital_rain_anim.h b/quantum/rgb_matrix/animations/digital_rain_anim.h
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+++ b/quantum/rgb_matrix/animations/digital_rain_anim.h
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+#if defined(RGB_MATRIX_FRAMEBUFFER_EFFECTS) && !defined(DISABLE_RGB_MATRIX_DIGITAL_RAIN)
+RGB_MATRIX_EFFECT(DIGITAL_RAIN)
+# ifdef RGB_MATRIX_CUSTOM_EFFECT_IMPLS
+
+# ifndef RGB_DIGITAL_RAIN_DROPS
+// lower the number for denser effect/wider keyboard
+# define RGB_DIGITAL_RAIN_DROPS 24
+# endif
+
+bool DIGITAL_RAIN(effect_params_t* params) {
+ // algorithm ported from https://github.com/tremby/Kaleidoscope-LEDEffect-DigitalRain
+ const uint8_t drop_ticks = 28;
+ const uint8_t pure_green_intensity = 0xd0;
+ const uint8_t max_brightness_boost = 0xc0;
+ const uint8_t max_intensity = 0xff;
+
+ static uint8_t drop = 0;
+
+ if (params->init) {
+ rgb_matrix_set_color_all(0, 0, 0);
+ memset(g_rgb_frame_buffer, 0, sizeof(g_rgb_frame_buffer));
+ 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 / RGB_DIGITAL_RAIN_DROPS) {
+ // top row, pixels have just fallen and we're
+ // making a new rain drop in this column
+ g_rgb_frame_buffer[row][col] = max_intensity;
+ } else if (g_rgb_frame_buffer[row][col] > 0 && g_rgb_frame_buffer[row][col] < max_intensity) {
+ // neither fully bright nor dark, decay it
+ g_rgb_frame_buffer[row][col]--;
+ }
+ // set the pixel colour
+ uint8_t led[LED_HITS_TO_REMEMBER];
+ uint8_t led_count = rgb_matrix_map_row_column_to_led(row, col, led);
+
+ // TODO: multiple leds are supported mapped to the same row/column
+ if (led_count > 0) {
+ if (g_rgb_frame_buffer[row][col] > pure_green_intensity) {
+ const uint8_t boost = (uint8_t)((uint16_t)max_brightness_boost * (g_rgb_frame_buffer[row][col] - pure_green_intensity) / (max_intensity - pure_green_intensity));
+ rgb_matrix_set_color(led[0], boost, max_intensity, boost);
+ } else {
+ const uint8_t green = (uint8_t)((uint16_t)max_intensity * g_rgb_frame_buffer[row][col] / pure_green_intensity);
+ rgb_matrix_set_color(led[0], 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 && g_rgb_frame_buffer[row][col] == max_intensity) {
+ g_rgb_frame_buffer[row][col]--;
+ }
+ // check if the pixel above is bright
+ if (g_rgb_frame_buffer[row - 1][col] == max_intensity) {
+ // allow old bright pixel to decay
+ g_rgb_frame_buffer[row - 1][col]--;
+ // make this pixel bright
+ g_rgb_frame_buffer[row][col] = max_intensity;
+ }
+ }
+ }
+ }
+ return false;
+}
+
+# endif // RGB_MATRIX_CUSTOM_EFFECT_IMPLS
+#endif // defined(RGB_MATRIX_FRAMEBUFFER_EFFECTS) && !defined(DISABLE_RGB_MATRIX_DIGITAL_RAIN)