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function init(){ canvas = document.getElementById('mycanvas'); W = H = canvas.width = canvas.height = 1000; pen = canvas.getContext('2d'); cs = 66; game_over = false; score = 5; //Create a Image Object for food food_img = new Image(); food_img.src = "Assets/apple.png"; trophy = new Image(); trophy.src = "Assets/trophy.png"; food = getRandomFood(); snake = { init_len:5, color:"blue", cells:[], direction:"right", createSnake:function(){ for(var i=this.init_len;i>0;i--){ this.cells.push({x:i,y:0}); } }, drawSnake:function(){ for(var i=0;i last_x || this.cells[0].y > last_y){ game_over = true; } } }; snake.createSnake(); //Add a Event Listener on the Document Object function keyPressed(e){ //Conditional Statments if(e.key=="ArrowRight"){ snake.direction = "right"; } else if(e.key=="ArrowLeft"){ snake.direction = "left"; } else if(e.key=="ArrowDown"){ snake.direction = "down"; } else{ snake.direction = "up"; } console.log(snake.direction); } document.addEventListener('keydown',keyPressed) ; } function draw(){ //console.log("In Draw"); //erase the old frame pen.clearRect(0,0,W,H); snake.drawSnake(); pen.fillStyle = food.color; pen.drawImage(food_img,food.x*cs,food.y*cs,cs,cs); pen.drawImage(trophy,18,20,cs,cs); pen.fillStyle = "blue"; pen.font = "20px Roboto" pen.fillText(score,50,50); } function update(){ //console.log("In Update"); snake.updateSnake(); } function getRandomFood(){ var foodX = Math.round(Math.random()*(W-cs)/cs); var foodY = Math.round(Math.random()*(H-cs)/cs); var food = { x:foodX, y:foodY, color:"red", } return food } function gameloop(){ if(game_over==true){ clearInterval(f); alert("Game Over"); return; } draw(); update(); } init(); var f = setInterval(gameloop,100);
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