arduino調光器GUI

gistfile1.pde

import controlP5.*;
import processing.serial.*;
ControlP5 cp5;
Knob[] colorKnob = new Knob[3];
Serial arduino;  
color ledColor;
int r=0, g=0, b=0;

void setup() 
{
  size(700, 255);
  String portName = Serial.list()[2];
  cp5 = new ControlP5(this);

  print(Serial.list()[2]);
  arduino = new Serial(this, portName, 9600);
  colorKnob[0] = cp5.addKnob("redKnob")
    .setRange(0, 254)
      .setValue(50)
        .setPosition(100, 70)
          .setRadius(50)
            .setDragDirection(Knob.VERTICAL)
              ;
  colorKnob[1] = cp5.addKnob("greenKnob")
    .setRange(0, 254)
      .setValue(50)
        .setPosition(300, 70)
          .setRadius(50)
            .setDragDirection(Knob.VERTICAL)
              ;
  colorKnob[2] = cp5.addKnob("blueKnob")
    .setRange(0, 254)
      .setValue(50)
        .setPosition(500, 70)
          .setRadius(50)
            .setDragDirection(Knob.VERTICAL)
              ;
}

void draw() {
  background(ledColor);
  if (arduino.available()>0) {
    String buf = arduino.readStringUntil(10);
    if (buf != null) {
      int[] color_buf = int(split(buf, ','));
      ledColor = color(color_buf[0], color_buf[1], color_buf[2]);
      println(buf);
    }
  }
}
void redKnob(int val) {
  r = val;
  send();
}
void greenKnob(int val) {
  g = val;
  send();
}
void blueKnob(int val) {
  b = val;
  send();
}
void send() {
  arduino.write(0);
  arduino.write(r);
  arduino.write(g);
  arduino.write(b);
}

void mouseClicked(){
   send(); 
}