fx.ino

// fun methods from examples
void whiteOverRainbow(uint8_t wait, uint8_t whiteSpeed, uint8_t whiteLength, uint8_t loops ) {

  if (whiteLength >= strip.numPixels()) whiteLength = strip.numPixels() - 1;

  int head = whiteLength - 1;
  int tail = 0;
  int loopNum = 0;

  static unsigned long lastTime = 0;


  while (true) {
    for (int j = 0; j < 256; j++) {
      for (uint16_t i = 0; i < strip.numPixels(); i++) {
        if ((i >= tail && i <= head) || (tail > head && i >= tail) || (tail > head && i <= head) ) {
          strip.setPixelColor(i, strip.Color(0, 0, 0, 255 ) );
        }
        else {
          strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
        }

      }

      if (millis() - lastTime > whiteSpeed) {
        head++;
        tail++;
        if (head == strip.numPixels()) {
          loopNum++;
        }
        lastTime = millis();
      }

      if (loopNum == loops) return;

      head %= strip.numPixels();
      tail %= strip.numPixels();
      strip.show();
      delay(wait);
    }
  }

}


// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for (j = 0; j < 256 * 5; j++) { // 5 cycles of all colors on wheel
    for (i = 0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

void rainbow(uint8_t wait) {
  uint16_t i, j;

  for (j = 0; j < 256; j++) {
    for (i = 0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

void fullWhite() {
  for (uint16_t i = 0; i < strip.numPixels(); i++) {
    strip.setPixelColor(i, strip.Color(0, 0, 0, 255 ) );
  }
  strip.show();
}

// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if (WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3, 0);
  }
  if (WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3, 0);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0, 0);
}