|
| 1 | +import {BASE_URL, loadPage} from "./spa.js"; |
| 2 | + |
| 3 | +const canvas = document.getElementById('pongCanvas'); |
| 4 | +const ctx = canvas.getContext('2d'); |
| 5 | + |
| 6 | +// Set initial positions for paddles and ball |
| 7 | +let ballX = canvas.width / 2; |
| 8 | +let ballY = canvas.height / 2; |
| 9 | +let ballSpeedX = 3; |
| 10 | +let ballSpeedY = 3; |
| 11 | + |
| 12 | +const paddleHeight = 200; |
| 13 | +const paddleWidth = 10; |
| 14 | +const paddleSpeed = 8; |
| 15 | + |
| 16 | +let player1Y = canvas.height / 2 - paddleHeight / 2; |
| 17 | +let player2Y = canvas.height / 2 - paddleHeight / 2; |
| 18 | + |
| 19 | +let pause = false |
| 20 | +let finish = false |
| 21 | +let firstStart = true |
| 22 | + |
| 23 | +let playerOneScore = 0 |
| 24 | +let playerTwoScore = 0 |
| 25 | + |
| 26 | +function drawRect(x, y, width, height, color) { |
| 27 | + ctx.fillStyle = color; |
| 28 | + ctx.fillRect(x, y, width, height); |
| 29 | +} |
| 30 | + |
| 31 | +function drawCircle(x, y, radius, color) { |
| 32 | + ctx.fillStyle = color; |
| 33 | + ctx.beginPath(); |
| 34 | + ctx.arc(x, y, radius, 0, Math.PI * 2, true); |
| 35 | + ctx.fill(); |
| 36 | +} |
| 37 | + |
| 38 | +function pauseGame() { |
| 39 | + pause = true |
| 40 | + setTimeout(function () { |
| 41 | + pause = false |
| 42 | + }, 3000) |
| 43 | +} |
| 44 | + |
| 45 | +function draw() { |
| 46 | + // clear the canvas |
| 47 | + drawRect(0, 0, canvas.width, canvas.height, 'black'); |
| 48 | + // draw net |
| 49 | + drawRect(canvas.width / 2 - 1, 0, 2, 1000, 'gray'); |
| 50 | + // draw paddles |
| 51 | + drawRect(0, player1Y, paddleWidth, paddleHeight, 'white'); |
| 52 | + drawRect(canvas.width - paddleWidth, player2Y, paddleWidth, paddleHeight, 'white'); |
| 53 | + // draw ball |
| 54 | + drawCircle(ballX, ballY, 15, 'white'); |
| 55 | + if (firstStart) { |
| 56 | + firstStart = false |
| 57 | + printCountdown() |
| 58 | + pauseGame() |
| 59 | + } |
| 60 | +} |
| 61 | + |
| 62 | +function update() { |
| 63 | + ballX += ballSpeedX; |
| 64 | + ballY += ballSpeedY; |
| 65 | + |
| 66 | + // ball collision with top and bottom walls |
| 67 | + if (ballY < 0 || ballY > canvas.height) { |
| 68 | + ballSpeedY = -ballSpeedY; |
| 69 | + } |
| 70 | + |
| 71 | + // ball collision with paddles |
| 72 | + if ( |
| 73 | + (ballX <= paddleWidth && ballY > player1Y && ballY < player1Y + paddleHeight) || |
| 74 | + (ballX >= canvas.width - paddleWidth && ballY > player2Y && ballY < player2Y + paddleHeight) |
| 75 | + ) { |
| 76 | + ballSpeedX = -ballSpeedX; |
| 77 | + } |
| 78 | + |
| 79 | + // ball out of bounds, reset position |
| 80 | + if (ballX < 0 || ballX > canvas.width) { |
| 81 | + setCurrentPoints() |
| 82 | + ballX = canvas.width / 2; |
| 83 | + ballY = canvas.height / 2; |
| 84 | + ballSpeedX = -ballSpeedX; |
| 85 | + player1Y = canvas.height / 2 - paddleHeight / 2; |
| 86 | + player2Y = canvas.height / 2 - paddleHeight / 2; |
| 87 | + if (!finish) { |
| 88 | + printCountdown() |
| 89 | + pauseGame() |
| 90 | + } |
| 91 | + } |
| 92 | +} |
| 93 | + |
| 94 | +function gameLoop() { |
| 95 | + if (!pause && !finish) { |
| 96 | + update(); |
| 97 | + draw(); |
| 98 | + } |
| 99 | + requestAnimationFrame(gameLoop); |
| 100 | +} |
| 101 | + |
| 102 | +gameLoop(); |
| 103 | + |
| 104 | +function setCurrentPoints() { |
| 105 | + if (ballX < 0) { |
| 106 | + playerTwoScore++ |
| 107 | + |
| 108 | + } else { |
| 109 | + playerOneScore++ |
| 110 | + } |
| 111 | + |
| 112 | + let points = document.getElementById("game-points"); |
| 113 | + |
| 114 | + points.innerText = `${playerOneScore} - ${playerTwoScore}`; |
| 115 | + |
| 116 | + if (playerOneScore == 5) { |
| 117 | + printWinner("Player 1") |
| 118 | + } else if (playerTwoScore == 5) { |
| 119 | + printWinner("Player 2") |
| 120 | + } |
| 121 | + |
| 122 | +} |
| 123 | + |
| 124 | +// handle player controls |
| 125 | +window.addEventListener('keydown', function (event) { |
| 126 | + if (!pause) { |
| 127 | + switch (event.key) { |
| 128 | + case 'w': |
| 129 | + if (player1Y > 0) { // Check if paddle 1 is not at the top edge |
| 130 | + player1Y -= paddleSpeed; |
| 131 | + } |
| 132 | + break; |
| 133 | + case 's': |
| 134 | + if (player1Y < canvas.height - paddleHeight) { // Check if paddle 1 is not at the bottom edge |
| 135 | + player1Y += paddleSpeed; |
| 136 | + } |
| 137 | + break; |
| 138 | + case 'ArrowUp': |
| 139 | + if (player2Y > 0) { // Check if paddle 2 is not at the top edge |
| 140 | + player2Y -= paddleSpeed; |
| 141 | + } |
| 142 | + break; |
| 143 | + case 'ArrowDown': |
| 144 | + if (player2Y < canvas.height - paddleHeight) { // Check if paddle 2 is not at the bottom edge |
| 145 | + player2Y += paddleSpeed; |
| 146 | + } |
| 147 | + break; |
| 148 | + } |
| 149 | + } |
| 150 | + |
| 151 | +}); |
| 152 | + |
| 153 | + |
| 154 | +function printCountdown() { |
| 155 | + let countdown = 3; |
| 156 | + let element = document.createElement("div"); |
| 157 | + element.id = "game-message-wrapper"; |
| 158 | + let textElement = document.createElement("h1"); |
| 159 | + textElement.id = "countdown"; |
| 160 | + textElement.innerText = countdown.toString(); |
| 161 | + element.appendChild(textElement); |
| 162 | + document.body.appendChild(element); |
| 163 | + let interval = setInterval(() => { |
| 164 | + countdown -= 1; |
| 165 | + textElement.classList.add("fade-in"); |
| 166 | + textElement.innerText = countdown.toString(); |
| 167 | + if (countdown === 0) { |
| 168 | + clearInterval(interval); |
| 169 | + element.remove(); |
| 170 | + } |
| 171 | + }, 1000); |
| 172 | +} |
| 173 | + |
| 174 | +function printWinner(winner) { |
| 175 | + finish = true |
| 176 | + let winnerHTML = ` |
| 177 | + <div class="winner-wrapper"> |
| 178 | + <div class="winner-image-wrapper"> |
| 179 | + <img src="https://picsum.photos/seed/picsum/200/300" alt="" /> |
| 180 | + </div> |
| 181 | + <div class="info-area"> |
| 182 | + <h2>Winner is ${winner}</h2> |
| 183 | + <h1 id="play-again" class="play-again">Play Again</h1> |
| 184 | + </div> |
| 185 | + </div> |
| 186 | + ` |
| 187 | + let element = document.createElement("div"); |
| 188 | + element.id = "game-message-wrapper"; |
| 189 | + element.innerHTML = winnerHTML; |
| 190 | + document.body.appendChild(element); |
| 191 | + const playAgain = document.getElementById('play-again') |
| 192 | + playAgain.addEventListener('click', () => { |
| 193 | + element.remove() |
| 194 | + resStartGame() |
| 195 | + }) |
| 196 | +} |
| 197 | + |
| 198 | + |
| 199 | +function resStartGame() { |
| 200 | + printCountdown() |
| 201 | + playerOneScore = 0 |
| 202 | + playerTwoScore = 0 |
| 203 | + let points = document.getElementById("game-points"); |
| 204 | + points.innerText = `${playerOneScore} - ${playerTwoScore}`; |
| 205 | + pauseGame() |
| 206 | + finish = false |
| 207 | +} |
0 commit comments