// Graphing sketch

// http://arduino.cc/en/Tutorial/Graph
// This program takes ASCII-encoded strings
// from the serial port at 9600 baud and graphs them. It expects values in the
// range 0 to 1023, followed by a newline, or newline and carriage return

// Created 20 Apr 2005
// Updated 18 Jan 2008
// by Tom Igoe
// This example code is in the public domain.

// MODIFIED BY SANTIAGO ECHEVERRY 20 Feb 2012


// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

// RUN THE TWO_POT CODE ON ARDUINO!!!!

/*
void setup() {
Serial.begin(9600);
}

void loop() {
int VAL0 = analogRead(A0); // Analog input 0
int VAL1 = analogRead(A2); // Analog input 2
Serial.print(VAL0);
Serial.print("\t");
Serial.print(VAL1);
Serial.print("\n");
}
*/

// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

import processing.serial.*;

Serial myPort; // The serial port
int xPos = 1; // horizontal position of the graph

void setup () {
// set the window size:
size(800, 600);

// List all the available serial ports
println(Serial.list());
// I know that the first port in the serial list on my mac
// is always my Arduino, so I open Serial.list()[0].
// Open whatever port is the one you're using.
myPort = new Serial(this, Serial.list()[0], 9600); // PAY ATTENTION TO SPEED
// don't generate a serialEvent() unless you get a newline character:
myPort.bufferUntil('\n');
// set inital background:
background(255);
}


void draw () {
// everything happens in the serialEvent()
}

void serialEvent (Serial myPort) {
// get the ASCII string:
String inString = myPort.readStringUntil('\n');

if (inString != null) {

// trim off any whitespace:
inString = trim(inString);

// ==>>> THIS IS THE CODE ADDED/MODIFIED BY SANTIAGO ECHEVERRY

// convert to ARRAY in order to retrieve the chunks of what arduino is sending
// in this case two pots sending info 0 - 1023
// my delimiter is the TAB \t => make sure there are no spaces inside the quotes

String[] chunk = split(inString, "\t");

//println(chunk[0] + " // " + chunk[1]);

float inByte0 = float(chunk[0]);
float inByte1 = float(chunk[1]);

int intByte0 = int(chunk[0]);
int intByte1 = int(chunk[1]);

// convert to an int and map to the screen height:

inByte0 = map(inByte0, 0, 1023, 0, height);
inByte1 = map(inByte1, 0, 1023, 0, width);

println(intByte0 + " // " + intByte1);

// START HAVING FUN!!!

background(255-intByte0/4);

stroke(intByte0/4, 0 , 255-intByte0/4);

strokeWeight(2);

fill(intByte0/4, 255, intByte1/4);

ellipse(400,300,inByte1,inByte0);

}

}