Network Mouse Control v 1.0.2 for Processing

/* Network mouse control of laser pointer.
This sketch uses mouse to send commands over network to Arduino.

Version 1.0 created on 10/30/2013
Current Version 1.0

steve.a.mccluskey@gmail.com
Code adapted from sketches found at http://www.instructables.com/id/Overview/

Revisions:
V1.0.1 Changed port to 5000 to see if lag is reduced. 11/2/13
V1.0.2 Added door sensor and yellow LED. Modified and corrected crosshair. 11/28/13.

Arduino pin layout is as follows:
0):
1):
2): Garage door sensor.
3): Servo X.
4): SD Card CS.
5): Servo Y.
6): Servo A, not connected.
7): Buzzer.
8): Laser.
9): Servo B, not connected.
10-13): Ethernet shield.
A4): Yellow connection status LED.
A5): Garage door open status LED.
*/


import processing.net.*;

Client myClient;
int xpos = 90;
int ypos = 90;
int a = 320; // position of green servoA position bar on left side of screen.
int b = 320; //position of red servoB position bar on bottom of screen.
boolean laser = false;
boolean ab = true;

void setup() {
  size(640, 640); //sets size of window
  frameRate(75);

  myClient = new Client(this, "192.168.1.176", 5000); //internal
}

void draw() { //draws window and graphics.
  if (mousePressed && (mouseButton == RIGHT)) { //sends buzzer on command while pressed.
    myClient.write("b");
  }
  else {
    myClient.write("n"); //sends buzzer off command.
  }

  if (mousePressed && (mouseButton == LEFT)) { //sends laser on command while pressed.
    myClient.write("l");
  }
  else {
    myClient.write("k"); //sends laser off command.
  }

  if (keyPressed) { //press "a" to control servoA with mouse wheel, "b" for servoB.
    if (key == 'a') {
      ab = true;
    }
    else if (key == 'b') {
      ab = false;
    }
  }

  if (myClient.available() > 0) { //check to see if any thing sent back from arduino over network.
    int ls = myClient.read();

    switch (ls) {
    case '1': //turn laser on and draw dot/line.
      laser = true;
      break;

    case '0': //turn laser off.
      laser = false;
      break;

    case '2': //move servoA position bar down.
      a = a + 7;
      break;

    case '3': //move servoA position bar up.
      a = a - 7;
      break;

    case '4': //move servoB position bar left.
      b = b - 7;
      break;

    case '5': //move servoB position bar right.
      b = b + 7;
      break;
    }
  }

  fill(175);
  rect(0, 0, 640, 640); // grey rectangle.
  fill(0, 0, 0);
  textSize(12);
  text("Click and hold left mouse for laser. Click and hold right mouse for buzzer.", 20, 30);
  //text("Press 'a' to control Servo A with mouse wheel. Press 'b' for Servo B.", 20, 60);

  if (myClient.ip() != null) { //checks to see if there is a connection.
    text("Connected.", 30, 600);
  }
  else {
    text("Connection failed.", 30, 600);
  }

  fill(150, 150, 150);
  ellipse(mouseX, mouseY, 40, 40); //outer target ring.
  fill(0, 0, 0);
  line(mouseX - 30, mouseY, mouseX + 30, mouseY);
  line(mouseX, mouseY - 30, mouseX, mouseY + 30);

  if (laser) { //checks to see if arduino sent laser on command, if it did, draw dot and line to it.
    stroke(140, 0, 0);
    line(320, 640, mouseX, mouseY); //line to red dot
    //noStroke();
    fill(255, 0, 0);
    ellipse(mouseX, mouseY, 10, 10); //red dot
    stroke(0, 0, 0);
  }

  fill(0, 255, 0); //draws green servoA position bar
  rect(0, a + 10, 20, 10);
  fill(255, 255, 0); //draws servoB position bar.
  rect(b + 10, 620, 10, 20);

  update(mouseX, mouseY); //sends mouse position to update() function
}

void update(int x, int y) { //calculates servo position from mouseX/Y and send to arduino:
  xpos = x / 4;
  ypos = y / 4;
  //output to servo (0-180):
  myClient.write(xpos + "x");
  myClient.write(ypos + "y");
}

/*void mouseClicked() { //sends laser command to arduino, never worked consistently
  if (mouseButton == LEFT) {
    myClient.write("l");
  }
}
 */
void mouseWheel(MouseEvent event) { //sends commands to arduino to move servoA/B depending on state of boolean ab.
  float e = event.getAmount();

  if (ab == true) { //activate servoA control.
    if (e > 0) {
      myClient.write("u"); //move servoA up.
    }

    if (e < 0) {
      myClient.write("d"); //move servoA down.
    }
  }

  else if (ab == false) { //activate servoB control.
    if (e > 0) {
      myClient.write("a");
    }

    if (e < 0) {
      myClient.write("s");
    }
  }
}