1 files changed, 167 insertions, 0 deletions
diff --git a/users/xtonhasvim/fancylighting.c b/users/xtonhasvim/fancylighting.c
new file mode 100644
index 000000000..f4af5ec55
--- /dev/null
+++ b/users/xtonhasvim/fancylighting.c
@@ -0,0 +1,167 @@
+ /* Copyright 2015-2017 Christon DeWan
+ *
+ * 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/>.
+ */
+
+#ifdef RGBLIGHT_ENABLE
+
+#include <math.h>
+
+#include "rgblight.h"
+#include "color.h"
+#include "fancylighting.h"
+
+
+__attribute__ ((weak))
+void matrix_scan_keymap(void) {
+  // override me, if you want.
+  return;
+}
+
+#define ABSDIFF(a,b) ((a)>(b)?(a)-(b):(b)-(a))
+
+#define FADE_BACK_TIME 500
+#define BREATH_FIRE_TIME 1000
+#define ANIMATION_STEP_INTERVAL 20
+#define POWER_KEY_OFFSET (RGBLED_NUM / 2)
+#define SPACE_OFFSET_MAX (RGBLED_NUM / 2)
+
+
+uint16_t effect_start_timer = 0;
+uint8_t user_rgb_mode = 0;
+LED_TYPE shadowed_led[RGBLED_NUM] = {0};
+
+void start_firey_return(void) {
+  user_rgb_mode = BREATH_FIRE;
+  effect_start_timer = timer_read();
+  for(uint8_t i = 0; i < RGBLED_NUM; i++) {
+    shadowed_led[i] = led[i];
+  }
+}
+
+/** 0---max
+ *  [___]
+ *  [__/]
+ *  [_/\]
+ *  [/\_]
+ *  [\__]
+ *  [___]
+ **/
+
+void set_color_for_offsets(uint16_t time_offset, uint16_t space_offset, uint8_t idx) {
+  float time_progress = (float)time_offset / BREATH_FIRE_TIME;
+  float space_progress = (float)space_offset / SPACE_OFFSET_MAX;
+  float progress = time_progress * 5.0 - space_progress;
+  if(progress > 1.0) {
+    progress -= 1.0;
+    progress /= 4.0;
+    progress = 1.0 - progress;
+  }
+  progress = fmax(0.0,progress);
+  progress *= progress; // squared!
+
+  float alpha = (time_progress + 0.1) * 7.0 - space_progress;
+  alpha = fmin(1.0, alpha*alpha);
+
+  LED_TYPE px[1] = {0};
+  sethsv((uint16_t)(fmod(time_progress * 1.5 + space_progress,1.0)*360), 255, (uint8_t)(progress*255),&px[0]);
+  led[idx].r = alpha * px[0].r + ( 1.0 - alpha) * shadowed_led[idx].r;
+  led[idx].g = alpha * px[0].g + ( 1.0 - alpha) * shadowed_led[idx].g;
+  led[idx].b = alpha * px[0].b + ( 1.0 - alpha) * shadowed_led[idx].b;
+}
+
+/**
+ * It's actually a rainbow: a fire curve didn't really look right.
+ * it's still cool, though!
+ */
+void rgb_mode_breath_fire(void) {
+  static uint16_t last_timer = 0;
+  if(!last_timer) last_timer = timer_read();
+  uint16_t this_timer = timer_read();
+
+  // too soon. don't spam updates
+  if(this_timer - last_timer < ANIMATION_STEP_INTERVAL) return;
+
+  uint16_t elapsed = this_timer - effect_start_timer;
+
+  last_timer = this_timer;
+  if(elapsed >= BREATH_FIRE_TIME) {
+    // complete
+    user_rgb_mode = FADE_BACK;
+    effect_start_timer = this_timer;
+  } else {
+    // linear fade
+    for(uint16_t i = 0; i < RGBLED_NUM; i++) {
+      uint16_t space_offset = ABSDIFF(i,POWER_KEY_OFFSET);
+      if(space_offset > SPACE_OFFSET_MAX) space_offset = RGBLED_NUM - space_offset;
+
+      set_color_for_offsets(elapsed, space_offset, i);
+    }
+    rgblight_set();
+  }
+}
+
+void rgb_mode_fade_back(void) {
+  static uint16_t last_timer = 0;
+  if(!last_timer) last_timer = timer_read();
+  uint16_t this_timer = timer_read();
+
+  // too soon. don't spam updates
+  if(this_timer - last_timer < ANIMATION_STEP_INTERVAL) return;
+
+  uint16_t elapsed = this_timer - effect_start_timer;
+
+  last_timer = this_timer;
+  float progress = (float)elapsed / FADE_BACK_TIME;
+  progress = fmin(1.0,progress);
+
+  for(uint8_t i = 0; i < RGBLED_NUM; i++) {
+    led[i].r = shadowed_led[i].r * progress;
+    led[i].g = shadowed_led[i].g * progress;
+    led[i].b = shadowed_led[i].b * progress;
+  }
+  rgblight_set();
+
+  if(elapsed >= FADE_BACK_TIME) user_rgb_mode = 0;
+}
+
+/** called when layer state or vstate has changed */
+__attribute__ ((weak))
+void set_state_leds(void) {
+  return;
+}
+
+void matrix_scan_user(void) {
+  static uint32_t last_layer = 0;
+  static uint32_t last_vstate = 0;
+  if(last_layer != layer_state || last_vstate != vstate) set_state_leds();
+  last_layer = layer_state;
+  last_vstate = vstate;
+
+  switch (user_rgb_mode) {
+    case BREATH_FIRE:
+      rgb_mode_breath_fire();
+      break;
+    case FADE_BACK:
+      rgb_mode_fade_back();
+      break;
+  }
+  matrix_scan_keymap();
+}
+
+#else
+
+void start_firey_return(void) {}
+
+#endif