Added KITT mode.

QuadLightsV3.ino

@@ -78,8 +78,8 @@ enum Mode {
   MODE_COUNT,
 };
 
-// Mode activeMode = MODE_HEAD;
-Mode activeMode = MODE_KITT;
+Mode activeMode = MODE_HEAD;
+// Mode activeMode = MODE_KITT;
 
 uint32_t colorHSV(float hue, float sat = 1.0, float val = 1.0) {
   return Adafruit_NeoPixel::ColorHSV(
@@ -98,6 +98,7 @@ const uint32_t COLOR_RED = ledsTail.Color(255, 0, 0, 0);
 const uint32_t COLOR_AMBER = colorHSV(10); // easier value fade
 const uint32_t COLOR_POLICE_BLUE = ledsTail.Color(0, 0, 255, 0);
 const uint32_t COLOR_POLICE_RED = ledsTail.Color(255, 0, 0, 0);
+const uint32_t COLOR_GREEN = ledsTail.Color(0, 255, 0, 0);
 
 unsigned long animationFrame = 0;
 unsigned long stableAnimationFrame = 0;
@@ -186,7 +187,7 @@ void animateLeftTailSide(uint32_t color, bool withMargin = true) {
 }
 
 void animateDash() {
-  ledsDash.clear();
+  ledsDash.fill(COLOR_GREEN);
 }
 
 void animateReverse() {
@@ -349,8 +350,97 @@ void animateRainbow() {
   ledsDash.setPixelColor(0, colorHSV(stableAnimationFrame * RAINBOW_SPEED + 90));
 }
 
+constexpr float KITT_SPEED = 0.5;
+constexpr int KITT_TRAIL = 4;
+constexpr float KITT_TAIL_SPEED = 3.0f; 
+
+int kittScanPos(int vPos) {
+  if (vPos < LEDS_RING_LENGTH) {
+    // first ring — reversed so it flows naturally into the edge
+    return LEDS_EDGE_LENGTH + (LEDS_RING_LENGTH - 1 - vPos);
+  } else if (vPos < LEDS_RING_LENGTH + LEDS_EDGE_LENGTH) {
+    // edge forward
+    return vPos - LEDS_RING_LENGTH;
+  } else if (vPos < 2 * LEDS_RING_LENGTH + LEDS_EDGE_LENGTH) {
+    // second ring
+    return LEDS_EDGE_LENGTH + (vPos - LEDS_RING_LENGTH - LEDS_EDGE_LENGTH);
+  } else {
+    // edge backward
+    return LEDS_EDGE_LENGTH - 1 - (vPos - 2 * LEDS_RING_LENGTH - LEDS_EDGE_LENGTH);
+  }
+}
+
 void animateKitt() {
-  // not implemented
+  const long kittFrame = lround(stableAnimationFrame * KITT_SPEED);
+  const int cycleLength = 2 * LEDS_EDGE_LENGTH + 2 * LEDS_RING_LENGTH;
+  const int vPos = kittFrame % cycleLength;
+
+  ledsHeadLeft.fill(COLOR_OFF);
+  ledsHeadRight.fill(COLOR_OFF);
+
+  // trail behind
+  for (int t = 0; t < KITT_TRAIL; t++) {
+    const int pastVPos = ((vPos - t) % cycleLength + cycleLength) % cycleLength;
+    const int scanPos = kittScanPos(pastVPos);
+
+    const uint32_t color = colorHSV(0, 1, 1.0f - (float)t / KITT_TRAIL);
+    ledsHeadLeft.setPixelColor(scanPos, color);
+    ledsHeadRight.setPixelColor(scanPos, color);
+  }
+
+  // lead ahead — shorter and dimmer than trail
+  constexpr int KITT_LEAD = 2;
+  for (int t = 1; t <= KITT_LEAD; t++) {
+    const int futureVPos = ((vPos + t) % cycleLength + cycleLength) % cycleLength;
+    const int scanPos = kittScanPos(futureVPos);
+
+    const uint32_t color = colorHSV(0, 1, 0.3f * (1.0f - (float)t / KITT_LEAD));
+    ledsHeadLeft.setPixelColor(scanPos, color);
+    ledsHeadRight.setPixelColor(scanPos, color);
+  }
+
+  const int scanPos = kittScanPos(vPos);
+  
+
+  // normalized cycle (0–1), sped up
+  float tailCycle = (float)vPos * KITT_TAIL_SPEED / cycleLength;
+  tailCycle -= (int)tailCycle;  // wrap to 0–1
+
+  // triangle wave: 0 → 1 → 0 (KITT bounce)
+  float tailT = tailCycle * 2.0f;
+  if (tailT > 1.0f) tailT = 2.0f - tailT;
+
+  // optional smoothing (gives that analog feel)
+  tailT = tailT * tailT * (3.0f - 2.0f * tailT); // smoothstep
+
+  // map to LED index
+  const int tailPos = lround(tailT * (LEDS_TAIL_LENGTH - 1));
+
+  // draw tail with falloff
+  for (int i = 0; i < LEDS_TAIL_LENGTH; i++) {
+    const int dist = abs(i - tailPos);
+    float brightness = 0.0f;
+
+    if (dist < KITT_TRAIL) {
+      brightness = 1.0f - (float)dist / KITT_TRAIL;
+    }
+
+    ledsTail.setPixelColor(i, colorHSV(0, 1, brightness));
+  }
+
+  ledsDash.fill(COLOR_OFF);
+
+  float speed = 3.0;
+
+  float dashCycle = (float)vPos * speed / cycleLength;
+  dashCycle -= (int)dashCycle;  // keep it in 0–1
+
+  // triangle wave: 0→1→0 over the cycle
+  float t = dashCycle * 2.0;
+  if (t > 1.0) t = 2.0 - t;
+
+  ledsDash.setPixelColor(0, colorHSV(0, 1, t));
+  ledsDash.setPixelColor(1, colorHSV(0, 1, 1.0 - t));
 }
 
 void animate(long now) {