// Example by Tom Igoe

import processing.serial.*;
import java.lang.Math;

// constants

int MINSIZE = 100;
int MAXSIZE = 640;

// global variables

int inByte;
int currSize = 300;

Serial myPort;  // The serial port

void setup() {
  // 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  Keyspan adaptor, so I open Serial.list()[0].
  // Open whatever port is the one you're using.
  myPort = new Serial(this, Serial.list()[1], 57600);
  
  size(1200, 640);
  noStroke();
  fill(0);
  background(255);

  rectMode(CENTER);
}

void serialEvent(Serial myPort) {

  inByte = myPort.read();

  println(inByte);

  //currSize+=(inByte/100);
  //if(currSize>height)currSize=height;
}


//void loop() 
//{ 
//  background(255);

  //currSize = int(constrain(currSize-Reciprocal_Logarithmic_model(currSize), MINSIZE, MAXSIZE));
  //println(currSize);
//  rect(width/2, height/2, currSize, currSize);
//} 


/*float Reciprocal_Logarithmic_model(float x_in)
{
  //reciprocal log model from zunzun.com
  //fit to data points
  //  100, 0
  //  800, 40

  float temp;
  temp = 0.0;

  // coefficients
  double a = -4.0025866201659571E+06;
  double b = 5.9877623536443559E+05;

  temp = (float)(1.0 /(a + b*Math.log(x_in)));
  return temp;

}
*/