//Perlin noise fire procedure 
//16x16 rgb led matrix demo
//Yaroslaw Turbin, 22.06.2020 

#include "FastLED.h"
 
// Matrix size
#define NUM_ROWS 12
#define NUM_COLS 5
#define NUM_LEDS NUM_ROWS * NUM_COLS
 
// LEDs pin
#define DATA_PIN 5
#define LED_TYPE    WS2812B
#define COLOR_ORDER GRB
 
// LED brightness
#define BRIGHTNESS 255
#define MAX_POWER_MILLIAMPS 800 
 
// Define the array of leds
CRGB leds[NUM_LEDS];
 
void setup() {
  FastLED.addLeds<LED_TYPE, DATA_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
  FastLED.setMaxPowerInVoltsAndMilliamps(5, MAX_POWER_MILLIAMPS);
  FastLED.setBrightness(BRIGHTNESS);
}
 
void loop() {
#define scalenoise 80 
int  a = millis();
  for (byte i = 0; i < NUM_COLS; i++) {
    for (byte j = 0; j < NUM_ROWS; j++) {
      leds[XY(i,j)] = ColorFromPalette (HeatColors_p , qsub8 (inoise8 (i * scalenoise , j * scalenoise+ a , a /3), 
      abs8(j - (NUM_ROWS-1)) * 255 / (NUM_ROWS+4)), BRIGHTNESS);	
}}
FastLED.show();
}

uint16_t XY (uint8_t x, uint8_t y) { return (y * NUM_COLS + x);}