Nice avatar image by the way. Looks like a recursive function, like a menger sponge

Ping Pong Tips - Some Final Tips Sometimes the most complicated games to master are the simplest games to explain. What can be simpler than table tennis games or ping pong? The two players at the opposite side of a table, separated by the grid. Each one has a paddle in hand: a serving, the other profits. They keep hitting the ball until someone misses. It's not simpler than that. However, this simple game is one of the hardest games to master for many reasons.

To get started, there are only a lot you can do with ping pong. You can hit it with topspin, back, or not spinning. You can hit it hard or soft. But you cannot challenge the physical or gravity laws. Usually, it will tell your opponent that if you hit the ball on your left, the ball will go on his right. It is not suddenly going to change direction and output somewhere else. Read Best ping pong paddle for beginners buying guide - Pingpongstart if you want to choose a paddle.

The problem is this. Table tennis is really a very predictable game if you have studied physics, mathematics and other scientific disciplines. Of course, most gamer players can spend most of the young age in table tennis games. However, it does not take much time to find out that the ball will react in some way from a certain blow.

So then what is it that separates the good players from the big players to one side just from pure skills?

The main thing that separates them is discipline and dexterity.

Discipline comes from reality. Let's face it, a practice can be a real drill. No one wants to take down a case of ping pong balls and practice serving for an hour. No one wants to call a friend down to him practicing lob back to you in fifteen minutes. The list of mundane tasks continues. But without these practice sessions, you simply won't get any better, at least no machinery. Plus, the more you practice, the stronger you get. And anyone who thinks you don't need the power to play ping pong hasn't come up against one of the Power players who can send that ball back to you at brilliant speeds. Unlike outdoor tennis, there is not much distance between you and your opponent. That ball is faster than you imagine. If you don't build your strength, you can't get your reflexes quickly. In a nutshell. Practice practice practice. Another thing, get best ping pong table at: https://pingpongstart.com to get higher level.

The ingenious part comes with experience and not something that can actually be taught. Oh Sure, someone can tell you to mix up your serve and return to keep your opponent's weight loss but can actually do that you must be able to perceive each point. It's hard to explain, but you need to develop a feeling that can visualize the best action to accomplish at any time in a moment will make your opponent scratching his head and wondering which image to come from. This arises from a clear mix of unexpected things. Example. In a moment that your opponent has just eaten a big melon so that you can storm into the next Tuesday, instead of doing what he's expecting, you just need an easy tire on the grid, completely causing him to lose vigilance. At the temperature of the moment with only one second to react he will never be able to get to the ball at the right time. But this is what can't be planned ahead. It must be felt through the course of the match.

The truth is, there are elements of ping pong like a chess match. Sometimes it is your mind and your non-reflexes wins. Discipline and dexterity. They are a deadly combo.

I'm having a hard time using noLoop and loop My code is supposed to create a ping pong game and everytime a player wins, the game is suppose to pause and if a user presses a key the game can continue

Is anyone able to tell me where I've went wrong with the right paddle and why it is not returning the ball like the left one is?

The code is very simple and needs to be followed this way for a project.

int leftPaddleY;
int rightPaddleY; int ballX, ballY;
int ballSpeedX = 5;

int scorel = 0; int scorer = 0;

void setup() { fullScreen(); fill(255); noStroke();

leftPaddleY = height / 2; rightPaddleY = height / 2;

ballX = width / 2; ballY = height / 2;

textSize(30); }

void draw() {

background(0);

rect(150, leftPaddleY, 25, 150); rect(1150, rightPaddleY, 25, 150);

rect(ballX, ballY, 25, 25);

ballX = ballX - ballSpeedX;

if (ballX < 0 || ballX > width) { ballX = width / 2; }

int leftPaddleLeftMargin = 150;
int rightPaddleRightMargin = 150; int leftPaddleRightMargin = 150 + 25; int rightPaddleLeftMargin = 150 + 25; int leftPaddleTopMargin = leftPaddleY;
int rightPaddleTopMargin = rightPaddleY; int leftPaddleBottomMargin = leftPaddleY + 150; int rightPaddleBottomMargin = rightPaddleY + 150;

if (ballX > leftPaddleLeftMargin && ballX < leftPaddleRightMargin) { if (ballY >= leftPaddleTopMargin && ballY < leftPaddleBottomMargin) { ballSpeedX = ballSpeedX * -1; } }

else if (ballX > rightPaddleRightMargin && ballX < rightPaddleLeftMargin) { if (ballY >= rightPaddleBottomMargin && ballY < rightPaddleTopMargin) { ballSpeedX = ballSpeedX * -1; } }

scores ();

}

void scores () { fill(255); text(scorel, 100, 50); text(scorer, width-200, 50);

} void keyPressed() { if (key == 'w') { leftPaddleY = leftPaddleY - 25; } else if (key == 's') { leftPaddleY = leftPaddleY + 25; }

if (key == 'o') 

{ rightPaddleY = rightPaddleY - 25; } else if (key == 'l') { rightPaddleY = rightPaddleY + 25; } }

Hmm, it looks like timeout. I found some links about what to do: https://stackoverflow.com/questions/9056159/websocket-closing-connection-automatically https://stackoverflow.com/questions/10585355/sending-websocket-ping-pong-frame-from-browser

I'll try to use this workaround, listen to onclose events, and when the socket closes, immediately reopen it.

// 3D pong
// still lot of room for improvement.
// ESC is off in the menu, use q instead.
//

// images 
PImage bg;
PImage startscreen;
// fonts 
PFont titlefont;
PFont menufont;
// game logic (during game)
boolean start;
boolean gameOver;
boolean autoPlay=false;
boolean inside; // inside paddle 
// stage / state:
// We give the stages proper names 
// so everything is better readable. 
final int stageMenu=1; // constants
final int stageGame=2;
final int stageInstructions=3;
int stage; // current stage 
// 
PVector boxSize; // containing box / game field 
PVector ballPos; // ball
PVector ballVel;
PVector paddlePos = new PVector(); // paddle
//
int score = 0;
int multiplier = 0;
int scoreincrement = 100;
int level = 1;

// ------------------------------------------------------------------------
void setup() {
  // (only once)
  size(550, 375, P3D);
  titlefont = createFont("Game-Over-250.vlw", 14);
  menufont = createFont("Harabara-80.vlw", 14);
  bg = loadImage("leo.jpg");
  startscreen = loadImage("start.jpg");
  stage = 1;
  sphereDetail(10);
  // containing box / game field  
  boxSize = new PVector();  // size
  boxSize.x = 480;  // size
  boxSize.y = 320;   // size
  boxSize.z = 750-30; // size 
  // init game
  reset();
  textMode(SHAPE); 
  println ("setup() is done.");
}

void reset() {
  // reset ball (multiple times)
  ballPos = new PVector(275, 187, -31);
  ballVel = new PVector(); // no speed
  // reset game logic 
  start = false; 
  gameOver=false;
  rectMode(CENTER);
  smooth();
  textSize(22);
}

// ------------------------------------------------------------------------

void draw() {
  //
  switch (stage) {
  case stageMenu:
    // menu
    functionForStageMenu();
    break;
  case stageGame:
    // Game
    functionForStageGame();
    break;
  case stageInstructions:
    // Instructions
    functionForStageInstructions ();
    break;
  default:
    println ("Big error 219 ####; stage being "
      + stage);
    exit();
    break;
  } // switch
  //
} // func
// -------------------------------------
void functionForStageMenu()
{ // menu
  fill(255, 0, 0);
  //noFill();
  // background(startscreen);
  background(0);
  textFont(titlefont, 60);
  textAlign(CENTER);
  text("3D Pong", 275, 100);
  textFont(menufont, 30);
  text(" X Start Game", 275, 200);
  text("  X Instructions", 275, 250);
  text("X Quit Game", 275, 300);
}
// ---------------------------------------
void functionForStageInstructions () {
  // instructions 
  //background(startscreen);
  background(0);
  textSize(17);  
  textFont(titlefont, 60);
  textFont(menufont, 30);
  text("Instructions", width/2, 100);
  textFont(menufont, 20);
  text("The objective of the game is to\n"+
    "hit the ball with your paddle and get\n"+
    "the highest score possible!\n"+
    "Hit ESC to go from Game back to Menu.\n"+
    "Hit q in the menu to quit.\n"+
    "To restart when it's \"Game Over\" click mouse twice.", 275, 150);
}
// ------------------------------------
void functionForStageGame() {
  // Game
  //background(bg);
  background(0);

  noStroke();
  lights();
  textFont(menufont, 18);
  fill(0, 255, 255);
  text("Score:", 125, 50);
  text(score, 185, 50);
  text("Level:", 350, 50);
  text(level, 410, 50);
  noFill();
  strokeWeight(0.75);
  stroke(50, 205, 50);
  //  quad(195, 137.5, 195, 237.5, 50, 350, 50, 25);
  //  quad(355, 137.5, 355, 237.5, 500, 350, 500, 25);
  stroke(50, 180, 205);
  //  boxes( 100, 50);     //Outer box
  //  stroke(50, 205, 50);
  //  boxes( 190, 120);
  //  boxes( 252, 170);
  //  boxes( 308, 210);
  //  boxes( 345, 240);
  //  boxes( 375, 262);
  //  stroke(205, 50, 50);
  //  boxes( 390, 275);    // Inner Box
  stroke(50, 205, 50);
  strokeWeight(0.75);
  noStroke();
  //
  // ball
  pushMatrix();
  fill(255, 0, 0);
  translate(ballPos.x, ballPos.y, ballPos.z);
  sphere(28);  // ball 
  popMatrix();
  // 
  // box (game field) 
  pushMatrix();
  stroke (255, 266, 2);
  noFill();
  translate(width/2, height/2, -boxSize.z/2); // pos 
  box( boxSize.x, boxSize.y, boxSize.z);  // size 
  popMatrix();
  //
  // paddle 
  pushMatrix();
  noFill();
  stroke(50, 50, 205);
  strokeWeight(2);
  // rect(mouseX, mouseY, 125, 80);
  noFill();
  //
  // get paddle pos
  if (autoPlay) {
    //if (ballPos.z>-200) {
    paddlePos.x=ballPos.x; 
    paddlePos.y=ballPos.y;
    //}
  } else 
  {
    paddlePos.x=mouseX;
    paddlePos.y=mouseY;
  }
  translate(paddlePos.x, paddlePos.y, -31); // pos 
  box( 125, 80, 2 );      // size
  strokeWeight(1); 
  popMatrix();
  //
  // 
  // is ball hitting the paddle?
  if ((ballPos.x > paddlePos.x-63)
    && (ballPos.x < paddlePos.x +63)
    && (ballPos.y > paddlePos.y - 40)
    && (ballPos.y < paddlePos.y + 40)) {  
    inside = true;
  } else {
    inside = false;
  }
  //
  // println(ballPos.z);
  ///////////////////////
  if (start) {
    if (!gameOver) {
      // actual movement 
      ballPos.x += ballVel.x;
      ballPos.y += ballVel.y;
      ballPos.z += ballVel.z;
      // 
      // Ball bouncing off and returning.
      // x
      if ( ballPos.x < width/2-boxSize.x/2)
      {
        // bounce off left side
        ballVel.x = abs(ballVel.x);
      } else if ( ballPos.x > width/2+boxSize.x/2)
      {
        // bounce off right side
        ballVel.x = -1 * abs(ballVel.x);
      }
      // y 
      if ( ballPos.y <  height/2-boxSize.y/2)
      {
        // bounce off left side
        ballVel.y = abs(ballVel.y);
      } else if ( ballPos.y > height/2+boxSize.y/2)
      {
        // bounce off right side
        ballVel.y = -1 * abs(ballVel.y);
      } 
      // z
      if (ballPos.z <= -750) {
        // the back of the box; later: did enemy hit the ball?
        ballVel.z = abs(ballVel.z);
      } else if (ballPos.z >= -30 && inside) {
        // we hit the ball
        ballVel.z = -1 * abs(ballVel.z) * 1.01;
        // a small random: 
        ballVel.x +=random(-1, 1);  // changed to +=
        ballVel.y +=random(-1, 1);  // changed to += 
        int scoreup = scoreincrement + multiplier;
        score += scoreup;
        multiplier += 10;
      } else if (ballPos.z >= -30 && !inside) {
        ballPos.z = -30;
        // switch to a game-over stage here
        gameOver=true;
      }
    }
  } // if 
  // 
  if (gameOver) {
    ballPos.z = -30;
    textFont(titlefont, 77);
    fill(255, 0, 0);
    hint(DISABLE_DEPTH_TEST);
    resetMatrix();
    camera();
    noLights();
    text("GAME OVER", 275, 200);
    hint(ENABLE_DEPTH_TEST);
  }
} // func
// -------------------------------------
void mouseClicked() {
  // what happens when mouse is clicked=
  // That is also depending on the stage: 
  switch (stage) {
  case stageMenu:
    analyzeMouseInMenu();
    break;
  case stageGame:
    if (!start) {
      // start level now 
      start = true;
      ballVel.z = random(-4.9, -6.9);
      ballVel.x = random(4, 5);
      ballVel.y = random(4, 5.5);
    } // if
    else if (gameOver) {
      // stay in the game but reset it
      reset();
      start=false;
      // OR go back to menu (not as cool)
      // stage = 1;
    } // else if 
    else { // ?????????????
      //      if  (ballVel.z == 0) {
      //        ballVel.z = -14;
      //      }
    }
    break;
  case stageInstructions:
    // back to menu
    stage = stageMenu;
    break;
  default:
    // error
    println ("Big error 734 +++++++++++++++++++++++++++++");
    exit();
    break;
  } // switch
  //
} // func
//
void analyzeMouseInMenu() {
  ////////////////////////
  //
  if ( mouseX > 18
    && mouseX < 185 + 180 +300
    && mouseY > 170
    && mouseY < 170 + 30)
  {
    stage = stageGame;
  } else if ( mouseX > 18
    && mouseX < 185 + 230 +333
    && mouseY > 170 + 50
    && mouseY < 170 + 50+50
    ) {
    stage = stageInstructions;
  } else if ( mouseX > 18
    && mouseX < 185 + 280 +333
    && mouseY > 170 + 80
    && mouseY < height
    ) {
    println ("Quit.");
    exit();
  }
}
//
void keyPressed() {
  switch (stage) {
  case stageMenu:
    // menu
    //
    // ESC key is killed  
    if (key==ESC) {
      // kill ESC
      key=0;
    } else if (key=='q') {
      // quit
      exit();
    } else {
      // do nothing
    }
    break;
  case stageGame:
    // Game
    // ESC key brings us back 
    if (key=='a') {
      autoPlay=!autoPlay;
    } else if (key==ESC) {
      // back to menu
      key=0;
      stage = stageMenu;
    }
    break;
  case stageInstructions:
    // Instructions
    // any key brings us back 
    // kill ESC 
    if (key==ESC) {
      key=0;
    }
    stage = stageMenu;
    break;
  default:
    println ("Big error 293 #######################; stage being "
      + stage);
    exit();
    break;
  } // switch
  //
}
// ------------------------------------------------------------------------
//void boxes (int j, int k) {
//  rect(width/2, height/2, width -j, height-k);
//}

// 

I'm almost completely new to programming in general so excuse my naivety.

I'm trying to draw a dashed line for my pong game yet it only draws the first two (the first one being in void setup and the second being inside the while loop). Surely the variables 'line1' and 'line2' shouldn't be reset as the 'void setup' block of code would only be executed again when the while evaluates to false (ie when line1 >= 600 and line2 >= 592) in which case the while would loop until the dashed line reached the bottom of the window. I don't know where I'm going wrong.

int ballX, ballY;
int ballRadius = 7;
int paddle1X, paddle1Y;
int paddle2X, paddle2Y;      
int paddle1Hor = 6, paddle1Vert = 30;    
int paddle2Hor = 6, paddle2Vert = 30;  
int i;
int line1;
int line2;


void setup()
{
  noSmooth();
  frameRate(30);
  size(800, 600);
  paddle1X = 50; 
  paddle1Y = 50; 
  paddle2X = 750;
  paddle2Y = 425;
  ballX = 398;
  ballY = 298;
  i = 0;
  line1 = 0;
  line2 = 8;
}

void draw()
{
  background(0);
  fill(255, 255, 255);
  rect(paddle1X, paddle1Y, paddle1Hor, paddle1Vert);
  rect(paddle2X, paddle2Y, paddle2Hor, paddle2Vert);
  rect(ballX, ballY, ballRadius, ballRadius);
  line(400, line1, 400, line2);
  while (line1 >= 600 && line2 >= 592);{
    line(400, line2+15, 400, line1+15);
  }
  stroke(255);

}

Hi, guys

I downloaded open source the game Pong two players. I resized all the stuff in general to fit in my screen 1920*1080, after this the ball cannot hit by the paddle and come back. can you check this code out and let me know how can I fix this? Thnx.

--------------------code----------------------------------------------

/* OpenProcessing Tweak of @http://www.openprocessing.org/sketch/7254@ / / !do not delete the line above, required for linking your tweak if you upload again */

boolean isGameStarted = false; //start variable

Paddle leftPaddle = new Paddle( 30, 500 ); Paddle rightPaddle = new Paddle(1870, 500 ); Ball ball = new Ball( 1000, 500 ); Player leftPlayer = new Player( 80, 900, 1, leftPaddle ); Player rightPlayer = new Player( 280, 900, 2, rightPaddle );

void setup() { size( 1920, 1080 ); //rectMode( CENTER ); //ellipseMode( CENTER ); smooth(); strokeWeight( 2 ); frameRate( 130 ); PFont arial; arial = loadFont( "ariblk.vlw" ); textFont( arial, 48 ); }

void draw() { processUserInput(); //starting page if ( isGameStarted == false ) { background(0); textSize(70); text("Pong!", 850, 400); textSize(30); text("with Arduino", 850, 450); textSize(30); text("_by Sohyun", 890, 510); textSize(90); text("Start?", 800, 650); stroke(255); noFill(); rect(760, 550, 370, 160); } else { //real setup here background(100); stroke(0); textSize(48); fill(255); line(950, 0, 950, 1200);

int leftdY = 0;
int rightdY = 0;
if ( isKeyPressed['q'] ) {        //Move the left player up.
  leftdY -= 0.5;
}
if ( isKeyPressed['a'] ) {       //Move the left player down.
  leftdY += 0.5;
}
if ( isKeyPressed['o'] ) {       //Move the right player up.
  rightdY -= 0.5;
}
if ( isKeyPressed['l'] ) {       //Move the right player down.
  rightdY += 0.5;
}

ball.move();
leftPaddle.move(  leftdY );
rightPaddle.move( rightdY );
ball.bounceOnWall();
ball.bounceOnPaddle(  leftPaddle );
ball.bounceOnPaddle( rightPaddle );

ball.display();
leftPaddle.display();
rightPaddle.display();
leftPlayer.handleGoalIfOtherPlayerScores( ball );
rightPlayer.handleGoalIfOtherPlayerScores( ball );
leftPlayer.display();
rightPlayer.display();

} }

void drawPlayfield() { background(100); stroke(0); textSize(48); fill(255); line(950, 0, 950, 1200); }

void resetGame() { leftPlayer.score = 0; rightPlayer.score = 0; leftPaddle.y = 500; rightPaddle.y = 500; ball.y = 500; ball.vx = -1.5; }

class Ball { float x; float y;

float vx;
float vy;

Ball( int newX, int newY ) {
    x = newX;
    y = newY;
    if ( random(1) < .5 ) {
        vx = 2;
    } else {
        vx = -2;
    }
}

void display() {
    fill( 255 );
    ellipse( x, y, 50, 50 );
}

void move() {
    x = x + vx;             
    y = y + vy;
}

void reset() {   //after one lose where ball will be started
    x = 950;
    y = 500;
    vy = 0;
}

void bounceOnWall() {
    if (  y < 0 || y > height ) {
        vy = -vy;
    }

    bounceOnPaddle(  leftPaddle );
    bounceOnPaddle( rightPaddle );
}

void bounceOnPaddle( Paddle paddle ) {


  if (      paddle.x < width / 2 && x == ( paddle.x + 6 )
         || ( paddle.x > width / 2 && x == ( paddle.x - 6 ) ) ) {
        if ( y >= paddle.y - 30 && y <= paddle.y + 30 ) {
            println( "bounce" + paddle );
            if ( y < paddle.y - 20 ) {
                vx = -vx;
                vy -= 2.5;
            } else if ( y > paddle.y + 20 ) {
                vx = -vx;
                vy += 2.5;
            } else {
                vx = -vx;
            }
            vy = constrain( vy, -1.5, 1.5 );
            move();
        }
    }
}

}

boolean[] isKeyPressed = new boolean[256]; boolean[] isCodedKeyPressed = new boolean[256];

void handleKeyEvent( boolean isPressed ) { if ( key == CODED ) { isCodedKeyPressed[ keyCode ] = isPressed; } else { isKeyPressed[ key ] = isPressed; } }

void keyPressed() { handleKeyEvent( true ); }

void keyReleased() { handleKeyEvent( false ); }

//thea area with the start button retangle void processUserInput() {
if ( isGameStarted == false && mousePressed && ( mouseX <= 1150 && mouseX >= 750 ) && ( mouseY <= 650 && mouseY >= 500 ) ) { isGameStarted = true; resetGame();
} else { moveLeftPlayer(); moveRightPlayer(); } }

//range of the paddles move
void moveLeftPlayer() {
if ( isKeyPressed['q'] || isKeyPressed['Q'] ) { //Move the left player up. leftPaddle.y = max(25, leftPaddle.y-2); } if ( isKeyPressed['a'] || isKeyPressed['A']) { //Move the left player down. leftPaddle.y = min(950, leftPaddle.y+2); } }

void moveRightPlayer() { if (isKeyPressed['o'] || isKeyPressed['O'] ) { //Move the right player up. rightPaddle.y = max(25, rightPaddle.y-2); } if ( isKeyPressed['l'] || isKeyPressed['L'] ) { //Move the right player down. rightPaddle.y = min(950, rightPaddle.y+2); } }

class Paddle { int x; int y;

Paddle( int newX, int newY ) {
    x = newX;
    y = newY;
}

void display() {
    stroke( 0 );
    fill( 80 );
    rect( x - 6, y - 25, 25, 120 );
    stroke( 255, 0, 0 );
    line( x-6, y - 25, x+6, y - 25 );
    line( x-6, y + 25, x+6, y + 25 );
}

void move( int dY ) {
     y = constrain( y + dY, 25, height - 25 );      // the range of moving paddle
}

}

class Player { int x; int y;

int nr;
int score;
Paddle paddle;

Player( int newX, int newY, int newNr, Paddle playerPaddle ) {
    x      = newX;
    y      = newY;
    nr     = newNr;
    score  = 0;
    paddle = playerPaddle;
}

//how score looks like void display() { stroke( 0 ); fill(255); textSize(100); text( score, x, y ); //place where the score }

void handleGoalIfOtherPlayerScores( Ball ball ) {
    if ( ball.x < 0 && paddle.x > width / 2 ) {
        score++;
        ball.reset();
    }
    if ( ball.x > width && paddle.x < width / 2 ) {
        score++;
        ball.reset();
    }
    if ( score >= 10 ) {
        text("player" + nr + " wins!", 50, 100 );
        textSize( 20 );
        text("<click to restart>", 110, 150);
        isGameStarted = false;
    }
}

}

@kfrajer I can send data between two computers (I have a PONG game osc example where theres a controller on one computer and the game on another- also what the setup of my current code is based off of).

My apologies-by not being able to send depth data, I meant I'm not entirely sure how to send and declare the data. It is in an int[], which I'm able to send, but not sure how to declare the data on the receiver.

Below is my attempt of doing so

Im so sorry if this is messy or not properly formatted If this is too much to interpret, its understandable.

Here is the source code, "hello" is the test variable I'm trying to send

    import netP5.*;
    import oscP5.*;
    import org.openkinect.freenect.*;
    import org.openkinect.processing.*;

    OscP5 osc;

    int myListeningPort = 12001;

    // Someone to talk to
    NetAddress destination;
    String destinationIP = "127.0.0.1"; // pong IP
    int destinationPort =   12000;        // pong port

    String playerAddressPattern = "/";

    // Kinect Library object
    Kinect kinect;

    float[] depthLookUp = new float[750];

    int[] hello; //Declaring the variable to send

    void setup() {
      // Rendering in P3D
      size(200, 200, P3D);

      kinect = new Kinect(this);
      kinect.initDepth();

      // Lookup table for all possible depth values (0 - 2047)
      osc = new OscP5(this, myListeningPort);

      destination = new NetAddress(destinationIP, destinationPort);
    }

    void draw() {
      int[] depth = kinect.getRawDepth();

      hello = depth;
    }

    void OscEvent(OscMessage theOscMessage) {
      //create a message with a unique address pattern
      OscMessage myOutGoingMessage = new OscMessage( playerAddressPattern );  
      //myOutGoingMessage.add("hi");
      myOutGoingMessage.add(hello); //send the depth data (as an int string)

      osc.send( myOutGoingMessage, destination );  // actually do the sending
    }

This is the Receiver, receiving the depth data. The second last line of code is what I am assuming the issue is - in not properly declaring the incoming int[] as an int[]. I know that I am currently trying to declare it as a regular int.

import oscP5.*;
import netP5.*;
import org.openkinect.freenect.*;
import org.openkinect.processing.*;

// Kinect Library object
Kinect kinect;

OscP5 oscP5;  // osc object
OscMessage currentMessage;

int iNet_myListeningPort  = 12000;  // port I am listening on 

float a = 0;

// We'll use a lookup table so that we don't have to repeat the math over and over
float[] depthLookUp = new float[750];

int[] hello;//Declare the depth that is coming in from the kinect. 


void setup() {

  size(800, 600, P3D);
  background(0);

  // This needs to be sent from pointcloud
  //kinect = new Kinect(this);
  kinect.initDepth();

  //kinect.update();

  for (int i = 0; i < depthLookUp.length; i++) {
    depthLookUp[i] = rawDepthToMeters(i);
  }

  oscP5 = new OscP5(this, iNet_myListeningPort);
}

void draw() {
  background(0);
  int[] depth = hello; // the actual depth values from the remote kinect. 

  // We're just going to calculate and draw every 4th pixel (equivalent of 160x120)
  int skip = 4; //


  translate(width/2, height/2, 300); //dot distance

  for (int x = 0; x < kinect.width; x += skip) {
    for (int y = 0; y < kinect.height; y += skip) {
      int offset = x + y*kinect.width;

      // Convert kinect data to world xyz coordinate
      int rawDepth = depth[offset];
      PVector v = depthToWorld(x, y, rawDepth);

      stroke(255, 0, 0);
      pushMatrix();
      float factor = 400; //overall Scale
      translate(v.x*factor, v.y*factor, factor-v.z*factor);
      // Draw a point
      point(0, 0);
      popMatrix();
    }
  }
}

float rawDepthToMeters(int depthValue) {
  if (depthValue < 750) {
    return (float)(1.0 / ((double)(depthValue) * -0.0030711016 + 3.3309495161));
  }
  return 0.0f;
}

PVector depthToWorld(int x, int y, int depthValue) {

  final double fx_d = 1.0 / 5.9421434211923247e+02;
  final double fy_d = 1.0 / 5.9104053696870778e+02;
  final double cx_d = 3.3930780975300314e+02;
  final double cy_d = 2.4273913761751615e+02;

  PVector result = new PVector();
  double depth =  rawDepthToMeters(depthValue);
  result.x = (float)((x - cx_d) * depth * fx_d);
  result.y = (float)((y - cy_d) * depth * fy_d);
  result.z = (float)(depth);
  return result;
}

void OscEvent (OscMessage theOscMessage) {
  hello=theOscMessage.get(0).intvalue(); //the value being recieved is an int[], not an int- how do i declare this?
}

This is my first time using Kinect and only my second time using oscP5 (with my first oscP5 work only requiring me to change the remote) so I really put myself in an awkward position here lol.

I am trying to convert some code and am nearly there but realize I do not understand how javascript and P5.js handles passing in an instance of one class to a method of another class. In this case, I am passing an instance of a paddle into the puck for a pong style game.

   ` //in the main program we initialize
    var puck = new Puck(); 
    var left = new Paddle(true);
    var right = new Paddle(false);
    //and then call the method like this
    puck.checkPaddleLeft(left);
    puck.checkPaddleRight(right);
...`


  `  //in the puck class we have this
    function Puck(){
     this.x = 600/2; // Place the puck in the middle of the x axis.
     this.y = 400/2; // Place the puck in the middle of the y axis.
     this.xspeed = 0; // Sets the initial puck speed along the x axis.
     this.yspeed = 0; // Sets the initial puck speed along the y axis.
     this.r = 12; // Establishes the radius of the puck at 12 pixels.
     //reset();

    Puck.protoype.checkPaddleLeft = function(p) { // Function to determine collision between the puck and the left paddle.
      if (y < p.y + p.h/2 && y > p.y - p.h/2 && this.x - this.r < p.x + p.w/2) {
        if (this.x > p.x) {
          var diff = y - (p.y - p.h/2);
          var rad = radians(45);
          var angle = map(diff, 0, p.h, -rad, rad);
          this.xspeed = 5 * cos(angle);
          this.yspeed = 5 * sin(angle);
          this.x = p.x + p.w/2 + this.r;
        }
      }
    }
...}`

When you try to run this, it returns "Cannot set property 'checkPaddleLeft' of undefined" Any assistance on how to structure such calls is appreciated.

This forum is a great help also when you are doing your first own programs.

You could program your own pong game and learn object oriented programming going there.

Just to get some practice and experience.

What would you like to do?

@kfrajer I really want to learn to the point where I can challenge myself with the code

Are you done and you don't know what to do next?

Yeah, that's it, I dont know what to do next, that's why I need a little help.

I guess it's not only about reading but about gaining own experience and programming your own programs from scratch. So when you set yourself a goal like a game Pong or Arkanoid and start from scratch you will learn from your mistakes and your own programming.

Yeah, I really want to do that, but I need some knowledge I don't have. That's why I'm going for the The Nature of Code: Simulating Natural Systems with Processing"

I think you started in the right places. There is a section books and a section tutorials also to go on.

I guess it's not only about reading but about gaining own experience and programming your own programs from scratch. So when you set yourself a goal like a game Pong or Arkanoid and start from scratch you will learn from your mistakes and your own programming.

Best, Chrisir

So I just started processing... I'm working on a pong game but the paddle on the left doesn't make the ball bounce o.0 Can someone help?

float ballX=300; float ballY=100; float speedX=6; float speedY=6; float padY=200; float padX=970; float padH=200; float pad2X=10; float pad2Y=200; float pad2H=200; float padSpeed=35; void setup() { size(1000,600); } void keyPressed() { if (key==CODED) { if (keyCode==UP) { padY=padY-padSpeed; } if (keyCode==DOWN) { padY=padY+padSpeed; } } if (key=='w') { pad2Y=pad2Y-padSpeed; } if (key=='s') { pad2Y=pad2Y+padSpeed; } } void draw() { background(255); fill(#00BC24); rect(500,0,width/2,height); if (ballX<width/2) fill(#00BC24); else fill(255); ellipse(ballX,ballY,40,40); //Ball fill(255); rect(padX,padY,20,padH); fill(#00BC24); rect(pad2X,pad2Y,20,pad2H);

if ((ballX>padX-10) && (ballY>=padY) && (ballY<=padY+padH)) speedX=-speedX; if ((ballX<pad2X+10) && (ballY<=pad2Y) && (ballY<=pad2Y+pad2H)) speedX=-speedX; if (ballY>height) speedY=-speedY; if (ballY<0) speedY=-speedY; ballX=ballX+speedX; ballY=ballY+speedY; }

Hey, I've been trying to make a game of basic pong in processing, and I need the ball to know when it's hit one of the 'players' or rectangles. The collision detection is in the main task under the "CollisionDetection()" method.

Main Task:

Ball ball = new Ball();
Player player1 = new Player();
Player player2 = new Player();
int score1, score2;
void setup()
{
size(600,400);
ball.construct();
player1.construct(10);
player2.construct(width - 20);
}

void draw()
{
 background(0);
 PrintText();
 ball.move();
 ball.check();
 ball.show();
 player1.move();
 player1.check();
 player1.show();
 player2.move();
 player2.check();
 player2.show();
 CheckBall();
 CollisionDetection();
}

void PrintText(){
textSize(16);
textAlign(CENTER,CENTER);
text(score1,100,50);
text(score2,width - 100,50);
}

void CheckBall(){
 if(ball.x >= width){
 score1 += 1;
 ball.x = width/2;
 ball.y = height/2;
 }
 if(ball.x <= 0){
 score2 += 1;
 ball.x = width/2;
 ball.y = height/2;
 }
}
void CollisionDetection(){
  if(ball.x + ball.y == player2.x + player2.y ){
   ball.vx *= -1;
   print("HIT");
  }

    if(ball.x + ball.y == player1.x + player1.y){
   ball.vx *= -1;
   print("HIT");
  }
 }

Ball Class:

class Ball
{
 float x,y,vx = 2,vy = 2;
 int size = 10;
 void construct(){
  x = width/2;
  y = height/2;
 }
 void move() {
 x = x + vx;
 y = y + vy;
 }
  void show() {
    stroke(255);
  ellipse(x,y,size,size);
 }
 void check(){
 if (y + size>= height) vy *= -1;
 if (y <= 0)vy *= -1;
 }

}

Player Class:

class Player
{
  float x,y;
  float size = 60;
  void construct(float input){
  x = input;
  y = height/2;
 }

 void move(){
  if(keyPressed){
   if (keyCode == DOWN){
    y = y + 2;
   } 
   if (keyCode == UP){
    y = y - 2;
   }
  }
 }
 void show(){
 rect(x,y,10,size);
 }

 void check(){
 if (y <= 10) y = 10;
 if (y + size >= height - 10) y = height - size - 10;
 }
}

If you know if anything is wrong with the code, could you please comment or message me. Thank you.

Currently, you check if (x > width) -- what does that do?

Also potentially of use: There are many, many past examples of working pong games in the forum:

• https://forum.processing.org/two/search?Search=pong

...and several examples of bouncing ball code in the processing documentation:

• https://processing.org/examples/bounce.html
• https://processing.org/examples/reflection1.html

I'm having a hitbox problem with the rectangle and can't get it to start back at x, instead it goes straight through the rectangle

int b = mouseY;
int c = 50;
int d = 50;

void setup() {
  size(500, 500);
  noStroke();
  smooth();
  b = mouseY;
}

void draw() {
  background(200);
  fill(1, 1, 1);
  textSize(20);
  text("score", 230, 50);
  fill(255, 0, 0);
  ellipse (x, y, 25, 25);
  x = x +3;

  fill(200, 200, 0);
  rect(a, mouseY, c, d);

  if (x > width) {
    x = 0;
    y = random(500);
  } else if (
    x = 0;
    y = random(500);
  }
}

Hello,

I agree with clankill3r

your learning curve will be steep with those programs but at least you will get good looking results that run fast - much harder if not impossible to achieve with processing (unless you have 50 very good people working for you on this).

To get a feel for programming in processing, I think 2D pong, then 3D pong is a good idea too.

I once did a program where you place different blocks in 3D. Then you can run a marble over it as a marble track.

Chrisir

Maybe you should start with something simple and work your way up. Minecraft is... really, really complicated.

Have you done any programming in Processing before, or in any other language? Maybe start with a target practice game, or a maze game? or 2D pong, then 3D pong?

Hey guys recently i decided to make a multiplayer pong game every player will play on their phones over bluetooth so to accomplish that i downloaded ketai library and started using bluetooth then i noticed that library was not finding any devies (i double checked that all bluetooth devices were visible) then i made some research and people says that you need to add coarse and fine location permissions to your sketch so i did that and it worked for once but then when i restarted the sketch it didnt i checked everything i didnt made any diffrence so can you help me get it working again?

Here is my code:

Pong.pde:

    import oscP5.*;
    import android.os.Bundle;
    import android.view.WindowManager;
    import android.content.res.Configuration;
    import android.content.Intent;
    import ketai.net.bluetooth.*;
    import ketai.ui.*;
    import ketai.net.*;
    KetaiBluetooth bt;
    Ball a;
    Paddle p;
    Paddle q;
    KetaiList klist;
    boolean mainScreen = false;
    boolean configured = false;
    float previous;
    float ballPrevious;
    int p1score;
    int state = 0;
    int p2score;
    float p1y;
    float p2y;

public void onConfigurationChanged(Configuration newConfig) {
  super.getActivity().onConfigurationChanged(newConfig);
}

void onCreate(Bundle bundle) {
  super.onCreate(bundle);
  bt = new KetaiBluetooth(this);
  super.onCreate(bundle);
  getActivity().getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}

void onActivityResult(int requestCode, int resultCode, Intent data) {
  bt.onActivityResult(requestCode, resultCode, data);
}

void setup()
{
  bt.start();
  textSize(72);
  textAlign(CENTER);
  previous = millis();
  q = new Paddle(10, 150, 250);
  p = new Paddle(10, 150, width - 250);
  a = new Ball();
  fullScreen();
  orientation(LANDSCAPE);
}

void draw()
{
  if (configured)
  {
    if (!mainScreen)
    {
      mainScreen();
    } else
    {
      if (touches.length == 2)
      {
        a.move();
        if (touches[0].x > width / 2)
        {
          p1y = touches[0].y;
          p2y = touches[1].y;
        } else
        {
          p1y = touches[1].y;
          p2y = touches[0].y;
        }
      }
      gameScreen();
      a.display();
      a.bounce();
      a.collideRightPaddle();
      a.collideLeftPaddle();
      a.offScreen();
      p.display();
      q.display();
      p.y = p1y;
      q.y = p2y;
      checkTime();
    }
  } else
  {
    bluetoothScreen();
  }
}

void checkTime()
{
  if (millis() - previous > 20000 && !(p.h == 200))
  {
    if (a.xs > 0) a.xs = a.xs + 1;
    if (a.xs < 0) a.xs = a.xs - 1;
    previous = millis();
    q.speed +=1.32;
    p.speed +=1.32;
    p.h += 8;
    q.h += 8;
  }
}

void touchStarted()
{
  if (touches[0].x > width / 2 - 250 && touches[0].y > height / 2 - 125 && touches[0].x < width / 2 + 250 && touches[0].y < height / 2 + 125 && configured) mainScreen = true;
  if (touches[0].y < height / 5 && touches[0].x < width / 3) bt.discoverDevices();
  if (touches[0].y < height / 5 && touches[0].x < width / 3 * 2 && touches[0].x > width / 3 && touches[0].x < width) bt.makeDiscoverable();
  if (touches[0].y < height / 5 && touches[0].x < width && touches[0].x > width / 3 * 2) getDevices();
}

void getDevices()
{
  if (bt.getDiscoveredDeviceNames().size() > 0) {
    ArrayList<String> list = bt.getDiscoveredDeviceNames();
    list.add("CANCEL");
    klist = new KetaiList(this, list);
  } else if (bt.getPairedDeviceNames().size() >= 0) {
    ArrayList<String> list = bt.getPairedDeviceNames();
    list.add("CANCEL");
    klist = new KetaiList(this, list);
  }
}

void onKetaiListSelection(KetaiList klist)
{
  String selection = klist.getSelection();
  if (!selection.equals("CANCEL"))bt.connectToDeviceByName(selection);
  klist = null;
}

Ball.pde:

class Ball
{
  float x = width / 2;
  float y = height / 2;
  float xs = -10;
  float angle = 45;
  float ys = 6;
  float diameter = 40;

  void move()
  {
    x += xs;
    y += ys;
  }

  void display()
  {
    fill(0, 255, 0);
    noStroke();
    ellipse(x, y, diameter, diameter);
    stroke(255);
    fill(255);
  }

  void bounce()
  {
    if ((y + diameter / 2) > height)
    {
      if(ys > 0) ys = -ys;
    }
    if ((y - diameter / 2) < 0)
    {
      if(ys < 0) ys = -ys;
    }
  }

  void collideRightPaddle()
  {
    float pbottom = p.y + p.h / 2;
    float ptop = p.y - p.h /2;
    if (y >= ptop && y <= pbottom && x + diameter / 2 > width - 250 - p.w / 2)
    {
      float place = y - p.y;
      angle = map(place, -(p.h / 2), (p.h / 2), -75, 75);
      ys = map(angle, -75, 75, -xs, xs);
      xs = -xs;
    }
  }

  void collideLeftPaddle()
  {
    float pbottom = q.y + q.h / 2;
    float ptop = q.y - q.h /2;
    if (y >= ptop && y <= pbottom && x - diameter / 2 < 250 + q.w / 2)
    {
      float place = y - q.y;
      angle = map(place, -(q.h / 2), (q.h / 2), 75, -75);
      ys = map(angle, -75, 75, -xs, xs);
      xs = -xs;
    }
  }

  void offScreen()
  {
    if ((x + diameter / 2) >= width - 190)
    {
      x = width / 2;
      y = height / 2;
      p1score++;
    }
    if ((x - diameter / 2) <= 190)
    {
      x = width / 2;
      y = height / 2;
      p2score++;
    }
  }
}

Paddle.pde:

class Paddle
{
  float w;
  float h;
  float x;
  float y = height / 2;
  float speed = 10;
  Paddle(float m, float n, float b)
  {
    w = m;
    h = n;
    x = b;
  }

  void display()
  {
    rectMode(CENTER);
    rect(x, y, w, h);
  }
}

Screen.pde: void mainScreen() { background(0); fill(0, 255, 0); rectMode(CENTER); rect(width / 2, height / 2, 500, 250); fill(255); text("PLAY", width / 2, height / 2 + 25); }

void gameScreen()
{
  background(0);
  stroke(255);
  strokeWeight(3);
  line(width / 2, 0, width / 2, height);
  text(p1score, 200, 200);
  text(p2score, width - 200, 200);
}

void bluetoothScreen()
{
  background(0);
  fill(78, 93, 75);
  rectMode(CORNER);
  stroke(255);
  strokeWeight(3);
  rect(0, 0, width / 3, height / 5);
  rect(width / 3, 0, width / 3 * 2, height / 5);
  rect(width / 3 * 2, 0, width, height / 5);
  textAlign(CENTER);
  fill(255);
  text("Discover Devices", width / 3 / 2, height / 5 / 2);
  text("Make Discoverable", width / 2, height / 5 / 2);
  text("Devices", width / 3 + width / 3 * 1.5, height / 5 / 2);
}

Cant give you manifest file it breaks it but i checked it and there is coarse and fine location permissions as well as bluetooth and bluetooth admin