testingpm/fillnoise.h at master · pauly7300/testingpm · GitHub

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#ifndef FILLNOISE_H
#define FILLNOISE_H

void fillnoise() {                                                             // Add a Perlin noise soundbar. This looks really cool.

// Local definitions
  #define xscale 160
  #define yscale 160

// Persistent local variables
  static int16_t xdist;                                                         // A random number for our noise generator.
  static int16_t ydist;


  timeval = 40;                                                                 // Our EVERY_N_MILLIS_I timer value.

  if (sampleavg > NUM_LEDS) sampleavg = NUM_LEDS;                               // Clip the sampleavg to maximize at NUM_LEDS.

  for (int i= (NUM_LEDS-sampleavg/2)/2; i<(NUM_LEDS+sampleavg/2)/2; i++) {      // The louder the sound, the wider the soundbar.
    uint8_t index = inoise8(i*sampleavg+xdist, ydist+i*sampleavg);              // Get a value from the noise function. I'm using both x and y axis.
    leds[i] = ColorFromPalette(currentPalette, index, sampleavg, LINEARBLEND);  // With that value, look up the 8 bit colour palette value and assign it to the current LED.
  }                                                                             // Effect is a NOISE bar the width of sampleavg. Very fun. By Andrew Tuline.

  xdist=xdist+beatsin8(5,0,3);                                                  // Moving forward in the NOISE field, but with a sine motion.
  ydist=ydist+beatsin8(4,0,3);                                                  // Moving sideways in the NOISE field, but with a sine motion.

  addGlitter(sampleavg/2);                                                      // Add glitter based on sample and not peaks.

  waveit();                                                                     // Move the pixels to the left/right, but not too fast.

  fadeToBlackBy(leds+NUM_LEDS/2-1, 2, 128);                                     // Fade the center, while waveit moves everything out to the edges.

} // fillnoise()

#endif