1 files changed, 45 insertions, 0 deletions
diff --git a/keyboards/gopolar/gg86/keymaps/horrortroll/led/rainbow_reactive_simple/rainbow_reactive_simple.h b/keyboards/gopolar/gg86/keymaps/horrortroll/led/rainbow_reactive_simple/rainbow_reactive_simple.h
new file mode 100644
index 0000000000..5b610716e0
--- /dev/null
+++ b/keyboards/gopolar/gg86/keymaps/horrortroll/led/rainbow_reactive_simple/rainbow_reactive_simple.h
@@ -0,0 +1,45 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+typedef HSV (*rainbow_reactive_f)(HSV hsv, uint8_t i, uint8_t time, uint16_t offset);
+
+bool effect_rainbow_reactive(effect_params_t* params, rainbow_reactive_f effect_func) {
+    RGB_MATRIX_USE_LIMITS(led_min, led_max);
+
+    uint8_t time = scale16by8(g_rgb_timer, rgb_matrix_config.speed / 4);
+    uint16_t max_tick = 65535 / rgb_matrix_config.speed;
+
+    for (uint8_t i = led_min; i < led_max; i++) {
+        RGB_MATRIX_TEST_LED_FLAGS();
+        uint16_t tick = max_tick;
+
+        // Reverse search to find most recent key hit
+        for (int8_t j = g_last_hit_tracker.count - 1; j >= 0; j--) {
+            if (g_last_hit_tracker.index[j] == i && g_last_hit_tracker.tick[j] < tick) {
+                tick = g_last_hit_tracker.tick[j];
+                break;
+            }
+        }
+
+        uint16_t offset = scale16by8(tick, rgb_matrix_config.speed);
+        RGB      rgb    = rgb_matrix_hsv_to_rgb(effect_func(rgb_matrix_config.hsv, i, time, offset));
+        rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
+    }
+
+    return led_max < DRIVER_LED_TOTAL;
+}
+\ No newline at end of file