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Snake game

2022-06-26 02:09:00 【Asmruan】 

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      * {
        margin: 0;
        padding: 0;
      }

      #map {
        width: 800px;
        height: 600px;
        background-color: #ccc;
        position: relative;
        /* position: absolute; */
      }
      /* div{
          position: absolute;
          background-color: aqua;
          width: 10px;
          height: 10px;
          top: 10px;
      }
      div:nth-of-type(1){
          left: 0px;
      }
      div:nth-of-type(2){
          left: 10px;
      }
      div:nth-of-type(3){
          left: 20px;
      }
      div:nth-of-type(4){
          left: 30px;
          background-color: red;
      } */
    </style>
  </head>
  <body>
    <header id="map">
      <!-- <div></div>
      <div></div>
      <div></div>
      <div></div> -->
    </header>
  </body>
</html>

<script>
  var position = "absolute";

  var map1 = document.getElementById("map");

  //  food    Wide and high     Location  X Y  Color 
  function Food(
    width = 10,
    height = 10,
    X = 0,
    Y = 0,
    backgroundColor = "red"
  ) {
    this.width = width;
    this.height = height;
    this.X = X;
    this.Y = Y;
    this.backgroundColor = backgroundColor;
  }

  //  Random   Rendering 
  Food.prototype.renderFood = function (map) {
    var maxX = map.offsetWidth - this.width;
    var maxY = map.offsetHeight - this.height;
    var div = document.createElement("div");
    div.style.position = "absolute";
    div.style.width = this.width + "px";
    div.style.height = this.height + "px";

    //  Random position   Show 

    //  Random food location ,map. Width /food. Width , How many points are there in total food Width , Random . And then multiply by food Width 
    this.X =
      parseInt((Math.random() * map.offsetWidth) / this.width) * this.width;
    this.Y =
      parseInt((Math.random() * map.offsetHeight) / this.height) * this.height;
    div.style.left = this.X + "px";
    div.style.top = this.Y + "px";

    div.style.backgroundColor = this.backgroundColor;

    this.foodDom = div;
    map.appendChild(div);
  };

  // var food1 = new Food()
  // width=10,height=10,X=0,Y=0,backgroundColor="red"
  var food1 = new Food(20, 20, 0, 0, "green");

  food1.renderFood(map1);

  //    The object of the snake    wide   high  left top   Snake-body. （ Array   object （X,Y, Color color））

  function Snake(width = 10, height = 10, direction) {
    this.width = width;
    this.height = height;
    //  Used to preserve snakes dom Elements 
    this.bodyDom = [];
    this.direction = "right";
    this.body = [
      { X: 2, Y: 1, backgroundColor: "red" },
      { X: 1, Y: 1, backgroundColor: "blue" },
      { X: 0, Y: 1, backgroundColor: "blue" },
    ];
  }

  Snake.prototype.renderSnake = function (map) {
    for (var i = 0; i < this.body.length; i++) {
      var div = document.createElement("div");
      div.style.position = "absolute";
      div.style.height = this.height + "px";
      div.style.width = this.width + "px";
      div.style.left = this.body[i].X * this.width + "px";
      div.style.top = this.body[i].Y * this.height + "px";
      div.style.backgroundColor = this.body[i].backgroundColor;

      //  Reserved snake dom
      this.bodyDom.push(div);
      map.appendChild(div);
    }
  };

  Snake.prototype.moveSnake = function (food, map) {
    console.log(this.body[0].X);

    //  If the head of the snake dies 
    if (
      this.body[0].X < 0 ||
      this.body[0].X >= map.offsetWidth / this.width ||
      this.body[0].Y < 0 ||
      this.body[0].Y >= map.offsetHeight / this.height
    ) {
      clearInterval(timer1);
      alert("over");
    }
    // if(this.body[0].X >= map.offsetWidth/this.width ){
    //     alert("over")
    // }
    // if(this.body[0].Y < 0 ){
    //     alert("over")
    // }
    // if(this.body[0].Y >= map.offsetHeight/this.height ){
    //     alert("over")
    // }

    //  If the snake head coincides with the food , Add one to the snake 
    var lastBody = this.body[this.body.length - 1];

    if (
      this.body[0].X == food.X / food.width &&
      this.body[0].Y == food.Y / food.height
    ) {
      //  Delete old food , Make new food 
      food.foodDom.remove();
      food.renderFood(map);
      this.body.push({
        X: lastBody.X,
        Y: lastBody.Y,
        backgroundColor: lastBody.backgroundColor,
      });
    }

    //    The snake moves 
    var lastBackgroundColor = this.body[this.body.length - 1].backgroundColor;
    for (var i = this.body.length - 1; i > 0; i--) {
      this.body[i].X = this.body[i - 1].X;
      this.body[i].Y = this.body[i - 1].Y;
      this.body[i].backgroundColor = lastBackgroundColor;
    }

    //  Snakehead 
    if (this.direction == "up") {
      this.body[0].Y--;
    }
    if (this.direction == "down") {
      this.body[0].Y++;
    }
    if (this.direction == "left") {
      this.body[0].X--;
    }
    if (this.direction == "right") {
      this.body[0].X++;
    }
  };
  //  Delete snake 
  Snake.prototype.deleteSnake = function () {
    for (var i = 0; i < this.bodyDom.length; i++) {
      this.bodyDom[i].remove();
    }
  };

  var snake1 = new Snake(20, 20);

  // setInterval(function(){
  //   //    Delete the previous snake , Make up the new 
  //   snake1.deleteSnake()
  //   for(var i=0;i<snake1.body.length;i++){
  //       snake1.body[i].X++
  //   }

  //   snake1.renderSnake(map1)
  // },500)

  // var list = document.querySelectorAll('div')
  // var list = document.getElementsByTagName('div')
  // var lastDiv = list[list.length-1]

  // console.log(lastDiv);

  // lastDiv.remove()

  console.log(snake1.bodyDom);

  //  Listening to keyboard events 

  //   (function keypress() {
  document.addEventListener("keypress", function (event) {
    var event = event || window.event;

    //   console.log(event);
    //   console.log(this);

    // a yes 97  The direction is left 
    if (event.keyCode == 97) {
      snake1.direction = "left";
    }
    if (event.keyCode == 119) {
      snake1.direction = "up";
    }
    if (event.keyCode == 100) {
      snake1.direction = "right";
    }
    
    if (event.keyCode == 115) {
      snake1.direction = "down";
    }
    console.log(snake1.direction);

  });
  //   })

  snake1.renderSnake(map1);
  var timer1 = setInterval(function () {
    snake1.deleteSnake();
    snake1.moveSnake(food1, map1);
    snake1.renderSnake(map1);
  }, 200);
</script>

原网站

版权声明
本文为[Asmruan]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/02/202202180550383939.html

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