原生js实现一个搭木桥小游戏代码-html代码-BFW代码库

代码语言：html
所属分类：游戏
代码描述：原生js实现一个搭木桥小游戏代码，按住鼠标左键生成木桥
下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开
<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">
<style>
    html,
body {
  height: 100%;
  margin: 0;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  cursor: pointer;
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}

#score {
  position: absolute;
  top: 30px;
  right: 30px;
  font-size: 2em;
  font-weight: 900;
}

#introduction {
  width: 200px;
  height: 150px;
  position: absolute;
  font-weight: 600;
  font-size: 0.8em;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  text-align: center;
  transition: opacity 2s;
}

#restart {
  width: 120px;
  height: 120px;
  position: absolute;
  border-radius: 50%;
  color: white;
  background-color: red;
  border: none;
  font-weight: 700;
  font-size: 1.2em;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  display: none;
  cursor: pointer;
}

#perfect {
  position: absolute;
  opacity: 0;
  transition: opacity 2s;
}

#youtube {
  display: none;
}

@media (min-height: 425px) {
  /** Youtube logo by https://codepen.io/alvaromontoro */
  #youtube {
    z-index: 2;
    display: block;
    width: 100px;
    height: 70px;
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: red;
    border-radius: 50% / 11%;
    transform: scale(0.8);
    transition: transform 0.5s;
  }

  #youtube:hover,
  #youtube:focus {
    transform: scale(0.9);
  }

  #youtube::before {
    content: "";
    display: block;
    position: absolute;
    top: 7.5%;
    left: -6%;
    width: 112%;
    height: 85%;
    background: red;
    border-radius: 9% / 50%;
  }

  #youtube::after {
    content: "";
    display: block;
    position: absolute;
    top: 20px;
    left: 40px;
    width: 45px;
    height: 30px;
    border: 15px solid transparent;
    box-sizing: border-box;
    border-left: 30px solid white;
  }

  #youtube span {
    font-size: 0;
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
  }
}
</style>

</head>
<body>

<div class="container">
  <div id="score"></div>
  <canvas id="game" width="375" height="375"></canvas>
  <div id="introduction">按住鼠标伸出一根棍子</div>
  <div id="perfect">双倍积分</div>
  <button id="restart">重新开始</button>
</div>


<script>
    /*



If you want to know how this game was made, check out this video, that explains how it's made: 

https://youtu.be/eue3UdFvwPo

Follow me on twitter for more: https://twitter.com/HunorBorbely

*/

// Extend the base functionality of JavaScript
Array.prototype.last = function () {
  return this[this.length - 1];
};

// A sinus function that acceps degrees instead of radians
Math.sinus = function (degree) {
  return Math.sin((degree / 180) * Math.PI);
};

// Game data
let phase = "waiting"; // waiting | stretching | turning | walking | transitioning | falling
let lastTimestamp;

let heroX; // Changes when moving forward
let heroY; // Only changes when falling
let sceneOffset; // Moves the whole game

let platforms = [];
let sticks = [];
let trees = [];

// Todo: Save high score to localStorage (?)

let score = 0;

// Configuration
const canvasWidth = 375;
const canvasHeight = 375;
const platformHeight = 100;
const heroDistanceFromEdge = 10; // While waiting
const paddingX = 100; // The waiting position of the hero in from the original canvas size
const perfectAreaSize = 10;

const backgroundSpeedMultiplier = 0.2;

const hill1BaseHeight = 100;
const hill1Amplitude = 10;
const hill1Stretch = 1;
const hill2BaseHeight = 70;
const hill2Amplitude = 20;
const hill2Stretch = 0.5;

const stretchingSpeed = 4; // Milliseconds it takes to draw a pixel
const turningSpeed = 4; // Milliseconds it takes to turn a degree
const walkingSpeed = 4;
const transitioningSpeed = 2;
const fallingSpeed = 2;

const heroWidth = 17; // 24
const heroHeight = 30; // 40

const canvas = document.getElementById("game");
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;

const ctx = canvas.getContext("2d");

const introductionElement = document.getElementById("introduction");
const perfectElement = document.getElementById("perfect");
const restartButton = document.getElementById("restart");
const scoreElement = document.getElementById("score");

// Initialize layout
resetGame();

// Resets game variables and layouts but does not start the game (game starts on keypress)
function resetGame() {
  // Reset game progress
  phase = "waiting";
  lastTimestamp = undefined;
  sceneOffset = 0;
  score = 0;

  introductionElement.style.opacity = 1;
  perfectElement.style.opacity = 0;
  restartButton.style.display = "none";
  scoreElement.innerText = score;

  // The first platform is always the same
  // x + w has to match paddingX
  platforms = [{ x: 50, w: 50 }];
  generatePlatform();
  generatePlatform();
  generatePlatform();
  generatePlatform();

  sticks = [{ x: platforms[0].x + platforms[0].w, length: 0, rotation: 0 }];

  trees = [];
  generateTree();
  generateTree();
  generateTree();
  generateTree();
  generateTree();
  generateTree();
  generateTree();
  generateTree();
  generateTree();
  generateTree();

  heroX = platforms[0].x + platforms[0].w - heroDistanceFromEdge;
  heroY = 0;

  draw();
}

function generateTree() {
  const minimumGap = 30;
  const maximumGap = 150;

  // X coordinate of the right edge of the furthest tree
  const lastTree = trees[trees.length - 1];
  let furthestX = lastTree ? lastTree.x : 0;

  const x =
    furthestX +
    minimumGap +
    Math.floor(Math.random() * (maximumGap - minimumGap));

  const treeColors = ["#6D8821", "#8FAC34", "#98B333"];
  const color = treeColors[Math.floor(Math.random() * 3)];

  trees.push({ x, color });
}

function generatePlatform() {
  const minimumGap = 40;
  const maximumGap = 200;
  const minimumWidth = 20;
  const maximumWidth = 100;

  // X coordinate of the right edge of the furthest platform
  const lastPlatform = platforms[platforms.length - 1];
  let furthestX = lastPlatform.x + lastPlatform.w;

  const x =
    furthestX +
    minimumGap +
    Math.floor(Math.random() * (maximumGap - minimumGap));
  const w =
    minimumWidth + Math.floor(Math.random() * (maximumWidth - minimumWidth));

  platforms.push({ x, w });
}

resetGame();

// If space was pressed restart the game
window.addEventListener("keydown", function (event) {
  if (event.key == " ") {
    event.preventDefault();
    resetGame();
    return;
  }
});

window.addEventListener("mousedown", function (event) {
  if (phase == "waiting") {
    lastTimestamp = undefined;
    introductionElement.style.opacity = 0;
    phase = "stretching";
    window.requestAnimationFrame(animate);
  }
});

window.addEventListener("mouseup", function (event) {
  if (phase == "stretching") {
    phase = "turning";
  }
});

window.addEventListener("resize", function (event) {
  canvas.width = window.innerWidth;
  canvas.height = window.innerHeight;
  draw();
});

window.requestAnimationFrame(animate);

// The main game loop
function animate(timestamp) {
  if (!lastTimestamp) {
    lastTimestamp = timestamp;
    window.requestAnimationFrame(animate);
    return;
  }

  switch (phase) {
    case "waiting":
      return; // Stop the loop
    case "stretching": {
      sticks.last().length += (timestamp - lastTimestamp) / stretchingSpeed;
      break;
    }
    case "turning": {
      sticks.last().rotation += (timestamp - lastTimestamp) / turningSpeed;

      if (sticks.last().rotation > 90) {
        sticks.last().rotation = 90;

        const [nextPlatform, perfectHit] = thePlatformTheStickHits();
        if (nextPlatform) {
          // Increase score
          score += perfectHit ? 2 : 1;
          scoreElement.innerText = score;.........完整代码请登录后点击上方下载按钮下载查看