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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              
            
          
!

CSS

            
              html, body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

canvas {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
}
            
          
!

JS

            
              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
}
            
          
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999px

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