noisefire.h

#ifndef NOISEFIRE_H
#define NOISEFIRE_H

void noisefire() {                                                              // Create fire based on noise and sampleavg. 

// Local definitions
  #define xscale 20                                                             // How far apart they are
  #define yscale 3                                                              // How fast they move

// Temporary local variable
  uint8_t index = 0;                                                            // Current colour lookup value.

  timeval = 0;                                                                  // Our EVERY_N_MILLIS_I timer value.

  currentPalette = CRGBPalette16(CHSV(0,255,2), CHSV(0,255,4), CHSV(0,255,8), CHSV(0, 255, 8),    // Fire palette definition. Lower value = darker.
                                 CHSV(0, 255, 16), CRGB::Red, CRGB::Red, CRGB::Red,                                   
                                 CRGB::DarkOrange,CRGB::DarkOrange, CRGB::Orange, CRGB::Orange,
                                 CRGB::Yellow, CRGB::Orange, CRGB::Yellow, CRGB::Yellow);
  
  for(int i = 0; i < NUM_LEDS; i++) {
    index = inoise8(i*xscale,millis()*yscale*NUM_LEDS/255);                     // X location is constant, but we move along the Y at the rate of millis(). By Andrew Tuline.

    index = (255 - i*256/NUM_LEDS) * index/128;                                 // Now we need to scale index so that it gets blacker as we get close to one of the ends
                                                                                // This is a simple y=mx+b equation that's been scaled. index/128 is another scaling.
    leds[i] = ColorFromPalette(currentPalette, index, sampleavg, NOBLEND);      // With that value, look up the 8 bit colour palette value and assign it to the current LED. 
  }                                                                             // The higher the value of i => the higher up the palette index (see palette definition).
                                                                                                     
} // noisefire()

#endif