snake/gridSnake.html at main · eric-z4/snake · GitHub

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<html>

<head>
    <script src="p5/p5.min.js"></script>
    <script>
        var gridX = [];
        var gridY = [];
        var arrX = [];
        var arrY = [];
        var gridSize = 12;
        var cellCountX = 50;
        var cellCountY = 50;
        var w = (gridSize * cellCountX) + 1;
        var h = (gridSize * cellCountY) + 1;
        var i = 0;
        var p = 0;
        var n = 0;
        var magicalCenterer = Math.ceil(gridSize / 4);
        var snakeX = 1;
        var snakeY = 1;
        var snakeDirection = 2; //0 left, 1 up, 2 right, 3 down
        var snakeSize = gridSize / 2;
        var snakeBodyAmt = 1;
        var snakeBodyX = [1];
        var snakeBodyY = [1];
        var trailX = [];
        var trailY = [];
        var moveInt = setInterval(snakeInterval, 80);

        var eatX = [];
        var eatY = [];
        var eatSize = gridSize / 2;
        var eatAmt = 3;
        var actSwitch = false;
        var gameOver = false;
        var points = 0;
        var eats = new eats();
        var snake = new snake();
        function setup() {
            createCanvas(w, h);
        }
        function draw() {
            background(220);
            for (i; i < h - 1; i += gridSize) { //setup position of grid
                gridY.push(i);
                for (var ii = 0; ii < w; ii += gridSize) {
                    gridX.push(ii);
                }
            }
            for (p; p < cellCountX; p++) { //coordinates X
                arrX.push(gridX[p]);
            }
            for (n; n < cellCountY; n++) { //coordinates Y
                arrY.push(gridY[n]);
            }
            if (trailX.length > snakeBodyAmt + 1) {
                trailX.pop();
            }
            if (trailY.length > snakeBodyAmt + 1) {
                trailY.pop();
            }

            if (actSwitch === true && snakeDirection !== -1) {
              document.getElementById('points').style.visibility = "visible";
              eats.activate();
              snake.move();
              snake.head();
              snake.body();
            } else if (actSwitch === false && gameOver === true) {
                document.getElementById('gameOverTitle').style.visibility = "visible";
                document.getElementById('gameOverBttn').style.visibility = "visible";
            }

            for (var y = 0; y < cellCountY; y++) { //show grid
                for (var x = 0; x < cellCountX; x++) {
                    stroke(200);
                    strokeWeight(1);
                    noFill();
                    rect(arrX[x], arrY[y], gridSize, gridSize);
                }
            }

            document.getElementById('points').style.left = w + 25;
            document.getElementById('points').innerHTML = "Points: " + points;
        }

        function start() {
            actSwitch = true;
            document.getElementById("startTitle").style.visibility = "hidden";
            document.getElementById("startBttn").style.visibility = "hidden";
        }

        function restart() {
            location.href = "gridSnake.html";
        }

        function snake() {
            this.move = function () {
                this.x = arrX[snakeX] + magicalCenterer;
                this.y = arrY[snakeY] + magicalCenterer;
                if (snakeX >= 0 || snakeX <= cellCountX) {
                    if (keyIsDown(65) && snakeDirection !== 2) { //left
                        snakeDirection = 0;
                    }
                    if (keyIsDown(68) && snakeDirection !== 0) { //right
                        snakeDirection = 2;
                    }
                }
                if (snakeY >= 0 && snakeY <= cellCountY) {
                    if (keyIsDown(87) && snakeDirection !== 3) { //up
                        snakeDirection = 1;
                    }
                    if (keyIsDown(83) && snakeDirection !== 1) { //down
                        snakeDirection = 3;
                    }
                }
                if (snakeY < 0 || snakeY > cellCountY || snakeX < 0 || snakeX > cellCountX) {
                    snakeDirection = -1;
                    actSwitch = false;
                    gameOver = true;
                }
            }
            this.head = function () {
                stroke(0);
                strokeWeight(1);
                fill(20, 255, 20);
                rect(this.x, this.y, snakeSize, snakeSize);
            };
            this.body = function () {
                stroke(0);
                strokeWeight(1);
                fill(50, 150, 50);
                for (var num = 0; num < snakeBodyAmt; num++) {
                    var x = arrX[snakeBodyX[num]] + magicalCenterer;
                    var y = arrY[snakeBodyY[num]] + magicalCenterer;
                    if (snake.x === x && snake.y === y && num > 0) {
                      actSwitch = false;
                      gameOver = true;
                    }
                    rect(x, y, snakeSize, snakeSize);
                }
            };
        }

        function eats() {
          this.activate = function() {
            if (eatX.length < eatAmt) {
              var x = Math.floor(Math.random() * cellCountX);
              eatX.push(x);
            }
            if (eatY.length < eatAmt) {
              var y = Math.floor(Math.random() * cellCountY);
              eatY.push(y);
            }
            for (var l = 0; l < eatAmt; l++) {
              this.x = arrX[eatX[l]] + magicalCenterer;
              this.y = arrY[eatY[l]] + magicalCenterer;
              if (this.x === snake.x && this.y === snake.y) {
                eatX.splice(l, 1);
                eatY.splice(l, 1);
                points++;
                snakeBodyAmt++;
              } else {
                stroke(0);
                strokeWeight(1);
                fill(255,255,20);
                ellipseMode(CORNER);
                ellipse(this.x, this.y, eatSize);
                ellipseMode(CENTER);
              }
            }
          };
        }
        function snakeInterval() {
            if (snakeDirection === 0) { //left
                snakeX--;
            }
            if (snakeDirection === 1) { //up
                snakeY--;
            }
            if (snakeDirection === 2) { //right
                snakeX++;
            }
            if (snakeDirection === 3) { //down
                snakeY++;
            }
            for (var iv = 0; iv < snakeBodyAmt; iv++) {
                if (iv === 0) {
                    trailX.unshift(snakeX);
                    trailY.unshift(snakeY);
                }
                snakeBodyX[iv] = trailX[iv + 1];
                snakeBodyY[iv] = trailY[iv + 1];
            }
        }
    </script>
    <style>
        body {
            overflow: hidden;
        }
        canvas {
            position: absolute;
            left: 20px;
            top: 20px;
            z-index: -1;
        }
        #points {
            position: absolute;
            user-select: none;
            visibility: hidden;
        }
        .title {
            position: absolute;
            left: 32px;
            top: 30px;
        }
        .bttnS {
            position: absolute;
            left: 32px;
            top: 93px
        }
        #gameOverTitle {
            visibility: hidden;
        }
        #gameOverBttn {
            visibility: hidden;
        }
    </style>
</head>

<body>
    <h1 id="points"></h1>
    <h1 class="title" id="startTitle">Grid Snake</h1>
    <button class="bttnS" onclick="start()" id="startBttn">Start Game</button>
    <h1 class="title" id="gameOverTitle">You hit your head</h1>
    <button class="bttnS" onclick="restart()" id="gameOverBttn">Restart Game</button>
</body>

</html>