/* Virtual Etch A Sketch using 2 Potentiometers
  This program reads two analog sensors via serial and draws their values as X and Y
  
  Processing Code
  Christian Nold, 22 Feb 06
*/ 

import processing.serial.*;

String buff = "";
String temp = "";

float temporary = 0.0;
float screenwidth = 0.0;

float xCoordinate = 0;
float yCoordinate = 0;

int val = 0;
int NEWLINE = 10;

Serial port;

void setup()
{
    size(200, 200);    
  strokeWeight(10);  // fat
  stroke(255);  
  smooth();
  
  port = new Serial(this, "COM2", 9600); // Change this to the correct serial port

}

void draw()
{
   fill(0,2); // use black with alpha 2
  rectMode(CORNER);
  rect(0,0,width,height);
  
  
  
  while (port.available() > 0) {
    serialEvent(port.read());
  }
    point(xCoordinate, yCoordinate);  
}



void serialEvent(int serial) 
{ 

  if(serial != NEWLINE) { 
    buff += char(serial);
  } else {
   
   if (buff.length() > 1) {
     
    temp = buff.substring(0, buff.length()-(buff.length()-1)); // this isolates just the beginning sensor identified
      
    if(temp.equals("A") == true) {     //sensor A value
     temp = buff.substring(1, buff.length());
     temporary = float(temp);
     
    xCoordinate =  width/(1024/temporary);
     println(xCoordinate);
    }
    
    if(temp.equals("B") == true) {     //sensor B value
     temp = buff.substring(1, buff.length());
     temporary = float(temp);
     
    yCoordinate = height/(1024/temporary);
    println(yCoordinate);
    }
    
    // Clear the value of "buff"
    buff = "";
    
   }
  }
}















/* Virtual Etch A Sketch using 2 Potentiometers
  This program reads two analog sensors via serial and draws their values as X and Y
  
  Arduino Code
  Christian Nold, 22 Feb 06
*/ 


int potPin = 4;    // select the input pin for the potentiometer
int potPin2 = 5;    // select the input pin for the potentiometer
int ledPin = 13;   // select the pin for the LED
int val = 0;       // variable to store the value coming from the sensor
int val2 = 0;       // variable to store the value coming from the sensor

void setup() {
  beginSerial(9600);
  pinMode(ledPin, OUTPUT);  // declare the ledPin as an OUTPUT
}

void loop() {

  val = analogRead(potPin);    // read the value from the sensor
  val2 = analogRead(potPin2);    // read the value from the sensor
      
  printString("A");    
  printInteger(val); // Example identifier for the sensor
  serialWrite(10);
  
  printString("B");
  printInteger(val2); // Example identifier for the sensor
  serialWrite(10);
}