added: "Swirl Fibonacci" animation.

Author: AlexxK

esp8266-fastled-webserver.ino

@@ -197,8 +197,9 @@ PatternAndNameList patterns = {
 
   { wheel, "Wheel" },
 
-  {fireFibonacci, "Fire Fibonacci"},
-  {waterFibonacci, "Water Fibonacci"},
+  { swirlFibonacci, "Swirl Fibonacci"},
+  { fireFibonacci, "Fire Fibonacci" },
+  { waterFibonacci, "Water Fibonacci" },
 
   { pacifica_loop,           "Pacifica" },
   { pacifica_fibonacci_loop, "Pacifica Fibonacci" },
@@ -1405,6 +1406,35 @@ void palettetest( CRGB* ledarray, uint16_t numleds, const CRGBPalette16& gCurren
   fill_palette( ledarray, numleds, startindex, (256 / NUM_LEDS) + 1, gCurrentPalette, 255, LINEARBLEND);
 }
 
+void swirlFibonacci() {
+
+  const float z = 2.5; // zoom (2.0)
+  const float w = 3.0; // number of wings (3)
+  const float p_min = 0.1; const float p_max = 2.0; // puff up (default: 1.0)
+  const float d_min = 0.1; const float d_max = 2.0; // dent (default: 0.5)
+  const float s_min = -3.0; const float s_max = 2.0; // swirl (default: -2.0)
+  const float g_min = 0.1; const float g_max = 0.5; // glow (default: 0.2)
+  const float b = 240; // inverse brightness (240)
+
+  const float p = p_min + beatsin88(13*speed) / (float)UINT16_MAX * (p_max - p_min);
+  const float d = d_min + beatsin88(17*speed) / (float)UINT16_MAX * (d_max - d_min);
+  const float s = s_min + beatsin88(7*speed) / (float)UINT16_MAX * (s_max - s_min);
+  const float g = g_min + beatsin88(27*speed) / (float)UINT16_MAX * (g_max - g_min);
+
+  CRGBPalette16 palette( gGradientPalettes[1] ); // es_rivendell_15_gp
+
+  for (uint16_t i = 0; i < NUM_LEDS; i++) {
+    float r = physicalToFibonacci[i] / 256.0 * z;
+    float a = (angles[i] + (beat88(3*speed)>>3)) / 256.0 * TWO_PI;
+    float v = r - p + d * sin(w * a + s * r * r);
+    float c = 255 - b * pow(fabs(v), g);
+    if (c < 0) c = 0;
+    else if (c > 255) c = 255;
+
+    leds[i] = ColorFromPalette(palette, (uint8_t)c);
+  }
+}
+
 void fireFibonacci() {
   for (uint16_t i = 0; i < NUM_LEDS; i++) {
     uint16_t x = coordsX[i];