float xmag, ymag = 0;
float newXmag, newYmag = 0; 

import processing.serial.*;      // import the serial lib
int [] vals = new int[1];         // raw values from the sensor
Serial myPort;                   // the serial port
boolean madeContact = false;     // whether there's been serial data in
 
void setup() 
{ 
  size(640, 400, P3D); 
  //smooth();
  //noStroke();
  
  // create a font with the second font available to the system:
  PFont myFont = createFont(PFont.list()[2], 14);
  textFont(myFont);

  // Open whatever port is the one you're using.
  myPort = new Serial(this, Serial.list()[0], 9600);
  // only generate a serial event when you get a return char:
  myPort.bufferUntil('\r');
  
  strokeWeight(2);
  colorMode(RGB, 1); 
} 
 
void draw() 
{ 
  background(0.5);
  
  // if you've never gotten a string from the microcontroller,
  // keep sending carriage returns to prompt for one: 
  if (madeContact == false) 
  {
    myPort.write('m');
  }

  // translate(width/2, height/2);
  float a = 2*PI*vals[0]/3600;
  
  pushMatrix(); 
 
  translate(width/2, height/2, -30); 
   
  rotateX(-0.4); 
  rotateY(-a); 
  
  scale(90);
  beginShape(QUADS);

  fill(0, 1, 1); vertex(-1,  1,  1);
  fill(1, 1, 1); vertex( 1,  1,  1);
  fill(1, 0, 1); vertex( 1, -1,  1);
  fill(0, 0, 1); vertex(-1, -1,  1);

  fill(1, 1, 1); vertex( 1,  1,  1);
  fill(1, 1, 0); vertex( 1,  1, -1);
  fill(1, 0, 0); vertex( 1, -1, -1);
  fill(1, 0, 1); vertex( 1, -1,  1);

  fill(1, 1, 0); vertex( 1,  1, -1);
  fill(0, 1, 0); vertex(-1,  1, -1);
  fill(0, 0, 0); vertex(-1, -1, -1);
  fill(1, 0, 0); vertex( 1, -1, -1);

  fill(0, 1, 0); vertex(-1,  1, -1);
  fill(0, 1, 1); vertex(-1,  1,  1);
  fill(0, 0, 1); vertex(-1, -1,  1);
  fill(0, 0, 0); vertex(-1, -1, -1);

  fill(0, 1, 0); vertex(-1,  1, -1);
  fill(1, 1, 0); vertex( 1,  1, -1);
  fill(1, 1, 1); vertex( 1,  1,  1);
  fill(0, 1, 1); vertex(-1,  1,  1);

  fill(0, 0, 0); vertex(-1, -1, -1);
  fill(1, 0, 0); vertex( 1, -1, -1);
  fill(1, 0, 1); vertex( 1, -1,  1);
  fill(0, 0, 1); vertex(-1, -1,  1);

  endShape();
  
  popMatrix(); 
} 

void serialEvent(Serial myPort) 
{ 
  // if serialEvent occurs at all, contact with the microcontroller
  // has been made:
  madeContact = true;
  // read the serial buffer:
  String myString = myPort.readStringUntil('\n');

  // if you got any bytes other than the linefeed:
  if (myString != null) 
  {
    myString = trim(myString);
    // split the string at the commas
    //and convert the sections into integers:
    int sensors[] = int(split(myString, ','));
    // if you received all the sensor strings, use them:
    if (sensors.length >= 1) 
    {
      vals[0] = sensors[0];
      delay(100);
      println(sensors[0]);
      // send out the serial port to ask for data:
      myPort.write('m');
    }
  }
}