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Control Processing games with arduino.

Step 1: Build Circuit

what you will need:

arduino uno

breadboard

8 Jumper wires

2 potentiometers

connect the potentiometers to the A0 and A1 pins

Step 2: Write Code for Arduino

int firstSensor = 0; // first analog sensor

int secondSensor = 1; // second analog sensor

int thirdSensor = 0; // digital sensor

int inByte = 0; // incoming serial byte

char letter = Serial.read();

void setup() { // start serial port at 9600 bps:

Serial.begin(9600);

while (!Serial) {

; // wait for serial port to connect. Needed for Leonardo only

}

pinMode(2, INPUT); // digital sensor is on digital pin 2

establishContact(); // send a byte to establish contact until receiver responds

}

void loop() {

// if we get a valid byte, read analog ins:

if (Serial.available() > 0) {

// get incoming byte:

inByte = Serial.read();

// read first analog input, divide by 4 to make the range 0-255:

firstSensor = analogRead(A0)/4;

// delay 10ms to let the ADC recover:

delay(10);

// read second analog input, divide by 4 to make the range 0-255:

secondSensor = analogRead(1)/4;

// read switch, map it to 0 or 255L

thirdSensor = map(digitalRead(2), 0, 1, 0, 255);

// send sensor values:

Serial.write(firstSensor);

Serial.write(secondSensor);

Serial.write(thirdSensor);

while (Serial.available() > 0) {

Serial.read(); //now do something with this byte

}

void establishContact() {

while (Serial.available() <= 0) {

Serial.print('A'); // send a capital A

delay(300);

}

}

Step 3: Write Code for Processing

import processing.serial.*;

Serial myPort; // 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

int xpos, ypos; // Starting position of the ball

boolean firstContact = false; // Whether we've heard from the microcontroller

boolean gameStart = false;

boolean hit = false;

float x = 500;

float y = 260;

float speedX = random(3, 5);

float speedY = random(3, 5);

int leftColor = 128;

int rightColor = 128;

int diam;

int rectSize = 50;

float diamHit;

int score1 = 0;

int score2 = 0;

int sound = 0;

void setup() {

myPort = new Serial(this, Serial.list()[0], 9600);

size(1000, 520); // Stage size

noStroke(); // No border on the next thing drawn

// Set the starting position of the ball (middle of the stage)

xpos = width/2;

ypos = height/2;

// Print a list of the serial ports, for debugging purposes:

println(Serial.list());

String portName = Serial.list()[0];

noStroke();

smooth();

ellipseMode(CENTER);

}

void draw() {

background(0);

rect (width-20, xpos-rectSize/2, 5, rectSize);

rect (20, ypos-rectSize/2, 5, rectSize);

textSize(20);

text("Player1: "+score1,width/4,30);

text("Player2: "+score2,width/1.5,30);

fill(255);

diam = 10;

ellipse(x, y, diam, diam);

if((x > width-21 && x < width -15 && y < xpos+rectSize/2 && y > xpos-rectSize/2)

||((x < 21 && x > 15 && y > ypos-rectSize/2 && y < ypos+rectSize/2) ) )

{

hit = true;

}

else {

hit = false;

}

if (gameStart) {

x = x + speedX;

y = y + speedY;

// if ball hits movable bar, invert X direction and apply effects

if((x > width-21 && x < width -15 && y < xpos+rectSize/2 && y > xpos-rectSize/2)

||((x < 21 && x > 15 && y > ypos-rectSize/2 && y < ypos+rectSize/2) ) )

{

speedX = speedX * -1;

x = x + speedX;

rightColor = 0;

fill(random(0,128),random(0,128),random(0,128));

diamHit = random(75,150);

ellipse(x,y,diamHit,diamHit);

}

// resets things if you lose

if (x > width) {

gameStart = false;

score1++;

x = width/2;

y = height/2;

speedX = random(3, 5);

speedY = random(3, 5);

rectSize = 50;

}

if (x <0) {

gameStart = false;

score2++;

x = width/2;

y = height/2;

speedX = random(3, 5);

speedY = random(3, 5);

rectSize = 50;

}

// if ball hits up or down, change direction of Y

if ( y > height || y < 0 ) {

speedY = speedY * -1;

y = y + speedY;

}

if (score1==3 || score2==3){

score1=0;

score2=0;

}

}

}

void mousePressed() { gameStart = !gameStart;

}

void serialEvent(Serial myPort) {

// read a byte from the serial port:

int inByte = myPort.read();

// if this is the first byte received, and it's an A,

// clear the serial buffer and note that you've

// had first contact from the microcontroller.

// Otherwise, add the incoming byte to the array:

if (firstContact == false) {

if (inByte == 'A') {

myPort.clear(); // clear the serial port buffer

firstContact = true; // you've had first contact from the microcontroller

myPort.write('A'); // ask for more

}

}

else {

// Add the latest byte from the serial port to array:

serialInArray[serialCount] = inByte;

serialCount++;

// If we have 3 bytes:

if (serialCount > 2 ) {

xpos = serialInArray[0]*2;

ypos = serialInArray[1]*2;

println(xpos + "t" + ypos + "t" + hit);

// Send a capital A to request new sensor readings:

if (hit = true){

myPort.write('B');

}

else{

myPort.clear();

myPort.write('A');

}

// Reset serialCount:

serialCount = 0;

}

}

}

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