Tennis Game

Open In Editor Publish Your Code

class Ball {
    constructor(x, y, radius) {
      this.x = x;
      this.y = y;
      this.shadowY = y;
      this.velocity = createVector(radius * 0.21, random(-radius * 0.084, radius * 0.084));
      this.radius = radius;
    }
  
    update(ballArc) {
      this.x += this.velocity.x;
      this.shadowY += this.velocity.y;
      this.y = this.shadowY - ballArc;
    }
  
    render() {
      push();
      noStroke();
      fill(54, 54, 54, 100);
      ellipse(this.x, this.shadowY, this.radius);
      stroke(54);
      strokeWeight(1);
      fill(255, 255, 0);
      ellipse(this.x, this.y, this.radius);
      pop();
    }
  }
  
  class Paddle {
    constructor(x, y, slope, bottomBound, topBound, images, isPlayer, width) {
      this.x = x;
      this.y = y;
      this.bottomBound = bottomBound;
      this.topBound = topBound;
      this.slope = -slope;
      this.images = images;
      this.counter = 0;
      this.animationSpeed = 0.1;
      this.width = width;
      this.height = width * 2;
      this.moveDirection = "none";
      this.isPlayer = isPlayer;
      this.playerHasMoved = false;
    }
  
    move() {
      const speed = this.height * 0.05;
      if (this.moveDirection === 'up' && this.y > this.topBound) {
        this.y -= speed
        this.x += (speed/this.slope)
        this.counter += this.animationSpeed;
      } else if (this.moveDirection === 'down' && this.y < this.bottomBound) {
        this.y += speed
        this.x -= (speed/this.slope)
        this.counter += this.animationSpeed;
      }
    }
  
    autoMove(ballY) {
      const diff = this.y - ballY;
      if (diff < 0 && diff < -this.height * 0.5) { // move down
        this.switchMoveDirection('down');
      } else if (diff > 0 && diff > this.height * 0.5) { // move up
        this.switchMoveDirection('up');
      } else {
        this.switchMoveDirection('none');
      }
      this.move();
    }
  
    switchMoveDirection(type) {
      switch (type) {
        case 'up':
          this.moveDirection = 'up';
          this.playerHasMoved = true;
          break
        case 'down':
          this.moveDirection = 'down';
          this.playerHasMoved = true;
          break
        default:
          this.moveDirection = 'none'
      }
    }
  
    render() {
      const y1 = this.y - this.height;
      const x1 = this.x + (this.height/this.slope);
  
      const x2 = x1 + this.width;
      const y2 = y1;
  
      const x3 = this.x + this.width;
      const y3 = this.y;
  
      this.imageIdx = floor(this.counter) % this.images.length;
  
      if (this.images.length > 0) {
        noStroke();
        fill(54, 54, 54, 25);
        ellipse(this.x, this.y + this.height, this.height, this.width * 1.5);
        imageMode(CENTER);
        image(this.images[this.imageIdx], this.x, this.y, this.width * 2, this.height * 2);
        if (this.isPlayer && !this.playerHasMoved) {
          textSize(14);
          fill(54);
          text("use the arrow keys to move!", this.x - padding, this.y - (this.height * 1.5));
        }
      } else {
        noStroke();
        fill(54);
        quad(this.x, this.y, x1, y1, x2, y2, x3, y3);
      }
    }
  }
  
  let width, height;
  let courtTopLeftX, courtTopLeftY, courtBottomLeftX, courtBottomLeftY,
      courtBottomRightX, courtBottomRightY, courtTopRightX, courtTopRightY;
  let netTopLeftX, netTopLeftY, netBottomLeftX, netBottomLeftY,
      netBottomRightX, netBottomRightY, netTopRightX, netTopRightY;
  let netWidth, shadowSize, padding, quadOffset;
  let paddleOne, paddleTwo;
  let ball;
  let leftPlayerScore, rightPlayerScore;
  let tennisManRedOne, tennisManRedTwo, tennisManBlueOne, tennisManBlueTwo;
  let courtHeight, courtWidth, maxBallArc, oneFourthPoint, threeFourthsPoint;
  
  function preload() {
    tennisManRedOne = loadImage('https://res.cloudinary.com/dkw0kkkgd/image/upload/v1550623424/tennisManRedOne_zaszr5.png');
    tennisManRedTwo = loadImage('https://res.cloudinary.com/dkw0kkkgd/image/upload/v1550623420/tennisManRedTwo_mz3skr.png');
    tennisManBlueOne = loadImage('https://res.cloudinary.com/dkw0kkkgd/image/upload/v1550623406/tennisManBlueOne_jo7ppq.png');
    tennisManBlueTwo = loadImage('https://res.cloudinary.com/dkw0kkkgd/image/upload/v1550623416/tennisManBlueTwo_ac6ppw.png');
  }
  
  function setup() {
    setupCanvas();
    leftPlayerScore = 0; rightPlayerScore = 0; // setup scoreboard
    setupCourtCoordinates();
    setupNetCoordinates();
    setupPaddles();
    ball = new Ball(width * 0.5, height * 0.5, width * 0.021); // setup ball
  }
  
  function setupCanvas() {
    height = min(window.innerHeight, window.innerWidth / 2);
    // keep court dimensions nice
    width = min(window.innerWidth, height * 2);
    createCanvas(width, height);
  }
  
  function draw() {
    paddleOne.move(); // move player according to keyboard inputs
    paddleTwo.autoMove(ball.y); // computer player moves on its own relative to the ball's position
    updateBall();
    isColliding(); // check if ball is colliding with players
    didHitWall(); // check if ball is colliding with walls
    didScore(); // check if a player has scored
    background(255); // draw background
    drawCourt();
    drawCourtLines();
    paddleOne.render(); // draw player
    paddleTwo.render(); // draw computer player
    drawNet();
    ball.render(); // draw ball
    drawScore();
  }
  
  function setupCourtCoordinates() {
    padding = height * 0.125;
    quadOffset = width * 0.125;
  
    // top left coordinates of court
    courtTopLeftX = padding + quadOffset;
    courtTopLeftY = padding;
  
    // bottom left coordinates of court
    courtBottomLeftX = padding;
    courtBottomLeftY = height - padding;
  
    // bottom right coordinates of court
    courtBottomRightX = width - padding - quadOffset;
    courtBottomRightY = height - padding;
  
    // top right coordinates of court
    courtTopRightX = width - padding;
    courtTopRightY = padding;
  }
  
  function setupNetCoordinates() {
    // net settings
    netWidth = height * 0.125;
    shadowSize = width * 0.021;
  
    // top left of net
    netTopLeftX = (width * 0.5) + quadOffset * 0.5;
    netTopLeftY = padding - netWidth;
  
    // bottom left of net
    netBottomLeftX = width * 0.5 - quadOffset * 0.5;
    netBottomLeftY = height - padding - netWidth;
  
    // bottom right of net
    netBottomRightX = width * 0.5 - quadOffset * 0.5;
    netBottomRightY = height - padding;
  
    // top right of net
    netTopRightX = width * 0.5 + quadOffset * 0.5;
    netTopRightY = padding;
  }
  
  function setupPaddles() {
    const bottomBound = courtBottomLeftY;
    const topBound = courtTopRightY;
    const yBounds = [bottomBound, topBound];
  
    const position = [courtBottomLeftX + 30, courtBottomLeftY - 60];
    const slope = (courtBottomLeftY - courtTopLeftY)/(courtBottomLeftX - courtTopLeftX);
    const blueImages = [tennisManBlueOne, tennisManBlueTwo];
    paddleOne = new Paddle(...position, slope, ...yBounds, blueImages, isPlayer = true, width * 0.03);
  
    const twoPosition = [courtTopRightX - 70, courtTopRightY + 60];
    const twoSlope = (courtTopRightY - courtBottomRightY)/(courtTopRightX - courtBottomRightX);
    const redImages = [tennisManRedOne, tennisManRedTwo];
    paddleTwo = new Paddle(...twoPosition, twoSlope, ...yBounds, redImages, isPlayer = false, width * 0.03);
  }
  
  function keyReleased() {
    if (keyCode === UP_ARROW || keyCode === DOWN_ARROW) {
      paddleOne.switchMoveDirection('none');
    } else if (keyCode === 87 || keyCode === 83) {
      paddleOne.switchMoveDirection('none');
    }
  }
  
  function keyPressed() {
    if (keyCode === UP_ARROW) {
      paddleOne.switchMoveDirection('up');
    } else if (keyCode === DOWN_ARROW) {
      paddleOne.switchMoveDirection('down');
    }
  }
  
  function isColliding() {
    const bottomOfBall = ball.y + ball.radius,
          topOfBall = ball.y - ball.radius,
          topOfPaddleOne = paddleOne.y - paddleOne.height,
          bottomOfPaddleOne = paddleOne.y + paddleOne.height,
          topOfPaddleTwo = paddleTwo.y - paddleTwo.height,
          bottomOfPaddleTwo = paddleTwo.y + paddleTwo.height;
  
    if (ball.x >= paddleOne.x - paddleOne.width && ball.x <= paddleOne.x + paddleOne.width) {
      if (topOfBall <= bottomOfPaddleOne && bottomOfBall >= topOfPaddleOne) {
        playerCollisionEvent();
      }
    } else if (ball.x >= paddleTwo.x - paddleTwo.width && ball.x <= paddleTwo.x + paddleTwo.width) {
      if (topOfBall <= bottomOfPaddleTwo && bottomOfBall >= topOfPaddleTwo) {
        computerCollisionEvent();
      }
    }
  }
  
  function playerCollisionEvent() {
    ball.velocity.x *= -1.03;
    ball.x = paddleOne.x + paddleOne.width + 5;
    let velocityMag;
    let xVel = ball.velocity.x;
  
    const maxTopSlope = (courtTopRightY - (paddleOne.y - paddleOne.height))/(courtTopRightX - (paddleOne.x + paddleOne.width)); // range from -0.38 to 0
    const maxBottomSlope = (courtBottomRightY - (paddleOne.y + paddleOne.height))/(courtBottomRightX - (paddleOne.x + paddleOne.width)); // range from 0 to 0.54
  
    if (ball.y < paddleOne.y) {
      velocityMag = -random(4);
      ball.velocity.y = map(velocityMag, -4, 0, xVel * maxTopSlope, 0);
    } else {
      velocityMag = random(4);
      ball.velocity.y = map(velocityMag, 0, 4, 0, xVel * maxBottomSlope);
    }
  }
  
  function computerCollisionEvent() {
    ball.velocity.x *= -1.03;
    ball.x = paddleTwo.x - paddleTwo.width - 4;
    let velocityMag;
    let xVel = ball.velocity.x;
  
    const maxTopSlope = (courtTopLeftY - (paddleTwo.y - paddleTwo.height))/(courtTopLeftX - (paddleTwo.x - paddleTwo.width)); // 0 to 0.56
    const maxBottomSlope = (courtBottomLeftY - (paddleTwo.y + paddleTwo.height))/(courtBottomLeftX - (paddleTwo.x - paddleTwo.width)); // 0 to -0.39
  
    if (ball.y < paddleTwo.y) {
      velocityMag = -random(4);
      ball.velocity.y = map(velocityMag, -4, 0, xVel * maxTopSlope, 0);
    } else {
      velocityMag = random(4);
      ball.velocity.y = map(velocityMag, 0, 4, 0, xVel * maxBottomSlope);
    }
  }
  
  function resetBall() {
    ball.x = width * 0.5;
    ball.y = height * 0.5;
    ball.shadowY = height * 0.5;
    ball.velocity.x = (ball.velocity.x < 0) ? ball.radius * 0.21 : -(ball.radius * 0.21);
    ball.velocity.y = random(-ball.radius * 0.084, ball.radius * 0.084);
  }
  
  function didHitWall() {
    const upperBound = courtTopLeftY;
    const lowerBound = courtBottomLeftY;
  
    if (ball.y <= upperBound) { ball.velocity.y *= -1 }
    if (ball.y >= lowerBound) { ball.velocity.y *= -1 }
  }
  
  function didScore() {
    const leftBound = courtBottomLeftX;
    const rightBound = courtTopRightX;
  
    if (ball.x <= leftBound) { rightPlayerScore++; resetBall(); }
    if (ball.x >= rightBound) { leftPlayerScore++; resetBall(); }
  }
  
  function updateBall() {
    let ballArc;
    maxBallArc = height * 0.0625;
    courtWidth = width - (2 * padding) - quadOffset;
    oneFourthPoint = courtBottomLeftX + quadOffset * 0.5 + courtWidth * 0.25;
    threeFourthsPoint = courtTopRightX - quadOffset * 0.5 - courtWidth * 0.25;
  
    const oneRacketX = paddleOne.x + paddleOne.width;
    const twoRacketX = paddleTwo.x - paddleTwo.width;
  
    if (ball.velocity.x > 0) { // ball is moving right
      if (ball.x <= width * 0.5) {
        ballArc = map(ball.x, oneRacketX, width * 0.5, maxBallArc * 0.5, maxBallArc);
      } else if (ball.x > width * 0.5 && ball.x <= threeFourthsPoint) {
        ballArc = map(ball.x, width * 0.5, threeFourthsPoint, maxBallArc, 0);
      } else {
        ballArc = map(ball.x, threeFourthsPoint, twoRacketX, 0, maxBallArc * 0.5);
      }
    } else { // ball is moving left
      if (ball.x >= width * 0.5) {
        ballArc = map(ball.x, twoRacketX, width * 0.5, maxBallArc * 0.5, maxBallArc);
      } else if (ball.x < width * 0.5 && ball.x >= oneFourthPoint) {
        ballArc = map(ball.x, width * 0.5, oneFourthPoint, maxBallArc, 0);
      } else {
        ballArc = map(ball.x, oneFourthPoint, oneRacketX, 0, maxBallArc * 0.5);
      }
    }
    ball.update(ballArc);
  }
  
  function drawCourt() {
    noStroke();
    fill(54);
    const shift = 10;
    quad(courtTopLeftX + shift, courtTopLeftY + shift, courtBottomLeftX + shift, courtBottomLeftY + shift, courtBottomRightX + shift, courtBottomRightY + shift, courtTopRightX + shift, courtTopRightY + shift);
  
    fill(161, 238, 168);
    quad(courtTopLeftX, courtTopLeftY, courtBottomLeftX, courtBottomLeftY, courtBottomRightX, courtBottomRightY, courtTopRightX, courtTopRightY);
  }
  
  function drawCourtLines() {
    stroke(255);
  
    courtHeight = height - (2 * padding);
    const topSingleLineX1 = padding + ((1 - 0.125) * quadOffset),
          topSingleLineY = padding + (0.125 * courtHeight),
          topSingleLineX2 = width - padding - (0.125 * quadOffset);
  
    // middle line
    line(oneFourthPoint, height* 0.5, threeFourthsPoint, height* 0.5);
  
    // center marker notch thingies
    const markerLength = width/64;
    const leftX = courtBottomLeftX + quadOffset * 0.5;
    const rightX = courtTopRightX - quadOffset * 0.5;
    line(leftX, height * 0.5, leftX + markerLength, height * 0.5);
    line(rightX - markerLength, height * 0.5, rightX, height * 0.5);
  
    line(topSingleLineX1, topSingleLineY, topSingleLineX2, topSingleLineY);
  
    const bottomSingleLineX1 = padding + (0.125 * quadOffset),
          bottomSingleLineY = padding + ((1 - 0.125) * courtHeight),
          bottomSingleLineX2 = width - padding - ((1 - 0.125) * quadOffset);
  
    line(bottomSingleLineX1, bottomSingleLineY, bottomSingleLineX2, bottomSingleLineY);
  
    // vertical lines in the middle of the court
    line(bottomSingleLineX1 + courtWidth * 0.25, bottomSingleLineY, topSingleLineX1 + courtWidth * 0.25, topSingleLineY);
  
    line(bottomSingleLineX2 - courtWidth * 0.25, bottomSingleLineY, topSingleLineX2 - courtWidth * 0.25, topSingleLineY);
  }
  
  function drawNet() {
    strokeWeight(1);
    // shadow
    noStroke();
    fill(54, 54, 54, 54);
    quad(netTopRightX, netTopRightY, netBottomRightX, netBottomRightY, netBottomRightX + shadowSize, netBottomRightY, netTopRightX + shadowSize, netTopRightY);
  
    stroke(54);
    // line across
    line(netBottomLeftX, netBottomRightY - netWidth * 0.75, netTopRightX, netTopRightY - netWidth * 0.75);
    line(netBottomLeftX, netBottomRightY - netWidth * 0.5, netTopRightX, netTopRightY - netWidth * 0.5);
    line(netBottomLeftX, netBottomRightY - netWidth * 0.25, netTopRightX, netTopRightY - netWidth * 0.25);
  
    line(netBottomRightX, netBottomRightY, netTopRightX, netTopRightY);
  
    // vertical net lines
    line(netBottomLeftX + quadOffset/10, (9*courtHeight)/10 + netWidth, netBottomLeftX + quadOffset/10, (9*courtHeight)/10);
    line(netBottomLeftX + (2*quadOffset)/10, (8*courtHeight)/10 + netWidth, netBottomLeftX + (2*quadOffset)/10, (8*courtHeight)/10);
    line(netBottomLeftX + (3*quadOffset)/10, (7*courtHeight)/10 + netWidth, netBottomLeftX + (3*quadOffset)/10, (7*courtHeight)/10);
    line(netBottomLeftX + (4*quadOffset)/10, (6*courtHeight)/10 + netWidth, netBottomLeftX + (4*quadOffset)/10, (6*courtHeight)/10);
    line(netBottomLeftX + (6*quadOffset)/10, (4*courtHeight)/10 + netWidth, netBottomLeftX + (6*quadOffset)/10, (4*courtHeight)/10);
    line(netBottomLeftX + (7*quadOffset)/10, (3*courtHeight)/10 + netWidth, netBottomLeftX + (7*quadOffset)/10, (3*courtHeight)/10);
    line(netBottomLeftX + (8*quadOffset)/10, (2*courtHeight)/10 + netWidth, netBottomLeftX + (8*quadOffset)/10, (2*courtHeight)/10);
    line(netBottomLeftX + (9*quadOffset)/10, courtHeight/10 + netWidth, netBottomLeftX + (9*quadOffset)/10, courtHeight/10);
  
    stroke(245);
  
    strokeWeight(4);
    line(netTopLeftX, netTopLeftY, netBottomLeftX, netBottomLeftY);
    // line through the middle of the net
    line(width * 0.5, height * 0.5, width * 0.5, height * 0.5 - netWidth)
    stroke(54);
    // left post
    line(netBottomRightX, netBottomRightY, netBottomLeftX, netBottomLeftY);
  
    // right post
    strokeWeight(3);
    line(netTopRightX, netTopRightY, netTopLeftX, netTopLeftY);
  }
  
  function drawScore() {
    textSize(height * 0.1);
    noStroke();
    fill(54);
    textAlign(RIGHT);
    text(leftPlayerScore, padding + quadOffset + (courtWidth * 0.25), padding - 10); // player score
    textAlign(LEFT);
    text(rightPlayerScore, width - padding - (courtWidth * 0.25), padding - 10); // computer score
  }

Tennis Game

Recommended

Brick Breaker Game HTML Canvas JavaScript

PACK MAN GAME

JavaScript Stack Game

HTML

CSS

JS

Recommended

Brick Breaker Game HTML Canvas JavaScript

PACK MAN GAME

JavaScript Stack Game

HTMLCopy

CSSCopy

JSCopy

HTML

CSS

JS