Week14.md - 4YCAaaa/wp109b GitHub Wiki

網頁設計第十四週練習筆記

HTML&CSS的一些額外補充

  • 版面可以使用bootstrap、w3school、sakura ...的套版，若有使用套版要標明清楚來源
  • Ifame : 可以把其他網頁或自己的網頁加到主網頁裡面(內嵌式網頁)
  • HTML Graphics
    • svg為向量圖，放大後不容易失真
    • 由於 SVG 是用 XML 編寫的，所有元素都必須正確關閉
  • 嘗試使用w3schools.game內的範例程式碼製作出貪食蛇
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<style>
canvas {
    border:1px solid #d3d3d3;
    background-color: #ECECFF;
}
</style>
</head>
<body onload="startGame()">
<script>

var myGamePiece;

function startGame() {
    myGameArea.start();
    myGamePiece = new component(30, 30, "#5151A2", 10, 120);
}

var myGameArea = {
    canvas : document.createElement("canvas"),
    start : function() {
        this.canvas.width = 753;
        this.canvas.height = 530;
        this.context = this.canvas.getContext("2d");
        document.body.insertBefore(this.canvas, document.body.childNodes[0]);
        this.interval = setInterval(updateGameArea, 20);
        window.addEventListener('keydown', function (e) {
            myGameArea.key = e.keyCode;
        })
        window.addEventListener('keyup', function (e) {
            myGameArea.key = false;
        })
    }, 
    clear : function(){
        this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);
    }
}

function component(width, height, color, x, y) {

    this.gamearea = myGameArea;
    this.width = width;
    this.height = height;
    this.speedX = 0;
    this.speedY = 0;    
    this.x = x;
    this.y = y;    
    this.update = function() {
        ctx = myGameArea.context;
        ctx.fillStyle = color;
        ctx.fillRect(this.x, this.y, this.width, this.height);
    }
    this.newPos = function() {
        this.x += this.speedX;
        this.y += this.speedY;        
    }
}

function updateGameArea() {
    myGameArea.clear();
    myGamePiece.speedX = 0;
    myGamePiece.speedY = 0;    
    if (myGameArea.key && myGameArea.key == 37) {myGamePiece.speedX = -1; }
    if (myGameArea.key && myGameArea.key == 39) {myGamePiece.speedX = 1; }
    if (myGameArea.key && myGameArea.key == 38) {myGamePiece.speedY = -1; }
    if (myGameArea.key && myGameArea.key == 40) {myGamePiece.speedY = 1; }
    myGamePiece.newPos();    
    myGamePiece.update();
}

function Food() {
            var len = 20;
            this.xFood = 0;
            this.yFood = 0;
            this.piece = null; 
            this.showfood = function () {
                if (this.piece === null) {
                    this.piece = document.createElement('div');
                    this.piece.style.width = this.piece.style.height = len + "px";
                    this.piece.style.backgroundColor = "#FFE153";
                    this.piece.style.position = "absolute";
                    document.body.appendChild(this.piece);
                }

                this.xFood = Math.floor(Math.random() * 20); 
                this.yFood = Math.floor(Math.random() * 17); 
 
                this.piece.style.left = this.xFood * len + "px";
                this.piece.style.top = this.yFood * len + "px";
 
            }
        }

window.onload = function () {
            food = new Food();
            food.showfood();
            startGame = new startGame();
            startGame.showstartGame()
          }
</script>

</body>
</html>

參考閱讀筆記: w3schools.com
參考閱讀筆記: 秀发浓密的程序猿

附註:很厲害的貪食蛇-CDSN-Joker_Ye

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