//based on exercise 5-3 - move rectangle across the screen
/*
float x = 0;
void setup() {
  size(200,200);
  smooth();
}
void draw() {
 background(255); 
 fill(0);
 rect(x,100,20,20);
 x = x + 1;
 if (x > 200) {
 x = 0;
 }
 }
*/

import processing.serial.*; //import processing library

int linefeed = 10;
Serial myPort; //the serial port

int pot1; //variable for potentiometer position

float x = 0;

void setup() {
  size(400,400);
  smooth();
  
  //list all available serial ports
  //println(Serial.list());

  //plug in the serial port number that is attached to Arduino, should be 0 on Mac
  myPort = new Serial(this, Serial.list()[0], 9600);

  //read bytes into a buffer until linefeed (ASCII 10)
  myPort.bufferUntil(linefeed);
  
  //initialize sensor value
  pot1 = 0;
}

void draw() {
  background(255);

  fill(0);
  rect(x,100,20,20);

  x = pot1;
  if (x > width) {
  x = 0;
  }
}

void serialEvent(Serial myPort) {
  //read serial buffer
  String myString = myPort.readStringUntil(linefeed);

  //if you have any bytes other than linefeed
  if (myString != null) {
    myString = trim(myString);

    //convert sensor values into integers
    int sensors[] = int(split(myString, ','));
    //print out the values from the variable sensor
    for (int sensorNum = 0; sensorNum < sensors.length; sensorNum++) {
      print("Sensor " + sensorNum + ": " + sensors[sensorNum] + "\t");
      pot1 = sensors[sensorNum];
    }
    //add a linefeed after all the sensor values are printed
    println();
  }
}