/* Serial call-and-response for v.90
by Tom Igoe

Sends a byte out the serial port, and reads 3 bytes in.
Sets foregound color, xpos, and ypos of a circle onstage
using the values returned from the serial port.

Thanks to Daniel Shiffman for the improvements

Updated 21 March 2005
*/

PImage candle;
PImage picture; 
float i=0;
float p=0;
int range=255; //range of the dimmer
int rand = 10; //detrmines the range of the flickering
float n = 10; //# of images
String pic = "picture0.gif";

import processing.serial.*;
Serial port;                               // the serial port
int[] serialInArray = new int[3];    // where we'll put what we receive
int serialCount = 0;                  // a count of how many bytes we receive
boolean firstContact = false;  // whether we've heard from the microcontroller


void setup()
{
  // print a list of the serial ports, for debugging purposes:
  println(Serial.list());

  /*  I know that the first port in the serial list on my mac
  is always my  Keyspan adaptor, so I open Serial.list()[0].
  On Windows machines, this generally opens COM1.
  Open whatever port is the one you're using.
  */
  //port = new Serial(this, "COM1", 9600);
  port = new Serial(this, Serial.list()[0], 9600);
  port.write(65);    // send a capital A to start the microcontroller sending

  candle = loadImage("candlelight.jpg");
  size(candle.width, candle.height);
  background(0);
  picture = loadImage(pic);
  fill(0);
}

void draw()
{
  // get any new serial data:
  while (port.available() > 0) {
    serialEvent();
    // note that we heard from the microntroller:
    firstContact = true;
  }
  // if there's no serial data,
  // send again until we get some.
  // (in case you tend to start Processing
  // before you start your external device):
    if (firstContact == false) {
    delay(300);
    port.write(65);
  }

  //p=dist(mouseX, mouseY, width/2, height-130);
  //range=height;
  colorMode(HSB, range);
  i=p+rand-random(2*rand);
  tint (i);
  image(candle, 0, 0);
  if(p==0)
  {
    pic = "picture" + int(1+random(n)) + ".jpg";
    picture = loadImage(pic);
  }
  rect(width/2-picture.width/2-5, 25, picture.width+10, picture.height+10);
  image(picture, width/2-picture.width/2, 30);
}

void serialEvent() {
  processByte((char)port.read());
}

void processByte(char inByte) {
  // add the latest byte from the serial port to array:
  serialInArray[serialCount] = inByte;
  serialCount++;
  // if we have 3 bytes:
  if (serialCount > 2 ) {
    p = (float)serialInArray[0];
    println(p);
    //xpos = (float)serialInArray[0];
    //ypos = (float)serialInArray[1];
    //fgcolor = (int)serialInArray[2];
    // send a capital A to request new sensor readings:
    port.write(65);
    // reset serialCount:
    serialCount = 0;


  }
}