//Processing code
//inputs xyz data via Bluetooth Mate and outputs color data to the computer screen.
//Arlene Ducao, Dec 2010


import processing.serial.*;

Serial myPort;  // Create object from Serial class
int xval, yval, zval;      // Data received from the serial port
int accelXmin = 400;
int accelXMax=650;
int accelYmin = 400;
int accelYMax=600;
int accelZmin = 430;
int accelZMax=650;
int rgbMin = 0, rgbMax=255;
int adjustedX, adjustedY, adjustedZ; // values adjusted to RGB range
String xString, yString, zString;


void setup()
{
  size(200, 200);
  println(Serial.list());  //list all the available serial ports
  //replace the 8 in the next line with your serial port number from the list above.  
  String portName = Serial.list()[4]; //My device is using "port 8" on my laptop
  myPort = new Serial(this, portName, 115200); //115200 is the data rate associated with this Bluetooth module
}

void draw()
{
  if ( myPort.available() > 0) {  // If data is available,
    xString = myPort.readStringUntil('\t');  //reads serial port until tab
    if (xString != null) { //checks if xString is null
      xString = trim(xString);
      xval = int(xString);  //converts string to integer
    }
    yString = myPort.readStringUntil('\t');  //reads serial port until tab
    if (yString != null) { //checks if yString is null
      yString = trim(yString);
      yval = int(yString);  //converts string to integer
    }
    zString = myPort.readStringUntil('\n');  //reads serial port until end of line
    if (zString != null) { //checks if zString is null
      zString = trim(zString);
      zval = int(zString);  //converts string to integer
    }

    //maps the sensor value onto the range 1-255 to correspond with color values    
    adjustedX = (xval - accelXmin) * (rgbMax - rgbMin) / (accelXMax - accelXmin) + rgbMin;   
    adjustedY = (yval - accelYmin) * (rgbMax - rgbMin) / (accelYMax - accelYmin) + rgbMin;  
    adjustedZ = (zval - accelZmin) * (rgbMax - rgbMin) / (accelZMax - accelZmin) + rgbMin;   

    background(50);             // Set background to dark grey
    fill(adjustedX, adjustedY, adjustedZ);     // set fill to accelerometer values
    rect(50, 50, 100, 100);     // this rect will be filled with the accelerometer values above
  }
}