PC_WS2812B_V1.0.ino

#include <Adafruit_NeoPixel.h>
#define PIN 2
#define NUMPIXELS 300
#define DELAY 10
const float briLen = 150;//length of lightning area
const float hueLen = 150;//length of hue cycle
float bri = 50;//=brightness/2
const float briSpeed = 1;//brightness transition speed
const float hueSpeed = 1.1;//hue transition speed

boolean power = true;
float briChange = 0;//brightness factor
float hueChange = 0;//hue factor

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  pixels.begin();
  Serial.begin(9600);
}

void serialEvent(){
  if(Serial.available() > 1){
    char flag = Serial.read();
    if(flag == 'p'){
      if(Serial.read() == 'o')power = true;
      else power = false;
      Serial.println("pxOK\n");
    }
    if(flag == 'b'){
      Serial.println("bxOK\n");
      bri = Serial.read();
      Serial.println(bri);
    }
  }
}

void loop() {
    
  pixels.clear();
  if(power){
  for(int i=0; i<NUMPIXELS/2; i++){
    float hueFac = 65536*(i+hueChange)/hueLen;
    float briFac = TWO_PI*(i+briChange)/briLen;
    if(0 < briFac && briFac < TWO_PI){
      pixels.setPixelColor(i, pixels.ColorHSV(hueFac, 255, (1.0 - cos(briFac))*bri));//~65536?, ~256, ~256
      pixels.setPixelColor(NUMPIXELS-i, pixels.ColorHSV(hueFac, 255, (1.0 - cos(briFac))*bri));//~65536?, ~256, ~256
    }
  }
  //pixels.setPixelColor(frameCount%NUMPIXELS, pixels.ColorHSV(((frameCount)*500), 255, 5));//~65536?, ~256, ~256
  //pixels.setPixelColor((NUMPIXELS-frameCount)%NUMPIXELS, pixels.ColorHSV(((frameCount)*500), 255, 5));//~65536?, ~256, ~256
  pixels.show();
  delay(DELAY);
  //update factor 
  briChange += briSpeed;
  if(briChange > briLen){
    briChange = -NUMPIXELS/2;
  }

  hueChange += hueSpeed;
//  if(hueChange > hueLen){
//    hueChange = -NUMPIXELS/2;
//  }
  }
  pixels.show();
}

PC_WS2812B_V1.0.pde

import processing.serial.*;
import processing.sound.*;
AudioIn in;
Amplitude amp;

// The serial port:
Serial myPort;       

void setup(){
  size(1000, 500);
  amp = new Amplitude(this);
  in = new AudioIn(this, 0);
  in.start();
  amp.input(in);
  
  in.start();
  // List all the available serial ports:
  printArray(Serial.list());
  
  // Open the port you are using at the rate you want:
  myPort = new Serial(this, "COM6", 9600);
  delay(1000);
  //myPort.write("aaaa");
  // Send a capital A out the serial port:
  //myPort.write("b1pp");
  //while(myPort.available() < 0);
  //println(myPort.readStringUntil('\n'));
  //println(myPort.readStringUntil('\n'));
  //myPort.write(1);
  myPort.write("aa");//initialize
  //for(int i=0; i<2; i++){
  //}
  //myPort.write("p");
  frameRate(10);
}

void mousePressed(){
  if(mouseButton == LEFT){
    myPort.write("po");//power on
  }else{
    myPort.write("pf");//power off
  }
}

void draw(){
  //if(myPort.available() > 0)
  //println(myPort.readStringUntil('\n'));
  myPort.write("b");
  //println(amp.analyze()*12700);
  myPort.write(int(amp.analyze()*12700));
  //myPort.write(constrain(int(map(mouseX, 0, width, 0, 127)), 0, 127));
}