/******************************* PLANAR FLOP 3D *******************************\
| Found on the internet....                                                    |
|                                                                              |
| Modified By: S. Dugre to use asynchronous timer                              |
\******************************************************************************/

byte spectrum[24][3] = {
  {8,0,0},{7,1,0},{6,2,0},{5,3,0},{4,4,0},{3,5,0},{2,6,0},{1,7,0},
  {0,8,0},{0,7,1},{0,6,2},{0,5,3},{0,4,4},{0,3,5},{0,2,6},{0,1,7},
  {0,0,8},{1,0,7},{2,0,6},{3,0,5},{4,0,4},{5,0,3},{6,0,2},{7,0,1},
};

byte cube[4][4][4];
byte x;
byte y;
byte z;

void rainbow_random() {

  if (currentState != lastState) {
    
    lastState = currentState;
    Serial.print("New State = ");
    Serial.println(currentState);

    randomSeed(analogRead(0));
    for (byte x = 0; x <= 3; x++) {
      for (byte y = 0; y <= 3; y++) {
        for (byte z = 0; z <= 3; z++) {
          cube[x][y][z] = random(24);
        }
      }
    }
    
    currentTimer = 0;
    maxTimer = 1875; // 30 ms  
  }

  if ( timerReset) {
  
    for (byte x = 0; x <= 3; x++) {
      for (byte y = 0; y <= 3; y++) {
        for (byte z = 0; z <= 3; z++) {
          byte val = cube[x][y][z];
          drawLed(red,  spectrum[val][0],x,y,z);
          drawLed(green,spectrum[val][1],x,y,z);
          drawLed(blue, spectrum[val][2],x,y,z);
          if ((x+y+z) % 2 == 0) { cube[x][y][z] = (val+1) % 24;}
          else                  { cube[x][y][z] = val == 0 ? 23 : val-1;}
        }
      }
    }
    flushBuffer();
    clearBuffer();
    //delay(30);
    currentTimer = 0;
    timerReset = false;
  }
}