This repository is for my students of Udemy. You can find all lecture codes along with mentioned files for reading in here. So, feel free to clone it and if you have any problem just raise a question.
License: MIT License
This repository is for my students of Udemy. You can find all lecture codes along with mentioned files for reading in here. So, feel free to clone it and if you have any problem just raise a question.
For cloning you must have "Git" installed in your system.
To clone just type the following:
git clone https://github.com/bijoyandas/Javascript_Game_Development_Course.git
If you find any mistakes or you can't figure out something, raise a question. I will get back to you asap.
I have copied the code exactly as you have but the variable square doesn't show the parameters of the height etc highlighted like yours does. What am I doing wrong? I am using Visual Studio I have copied it in to notepad so you can see.
drawing object in notepad identical.txt
my code
<html>
<head>
<title>Snake Game</title>
</head>
<body>
<center><canvas height="500" width="500" id="ctx" style="border:2px solid #000000"></canvas>
</center>
<script>
var ctx = document.getElementById('ctx').getContext('2d');
var WIDTH = 500;
var HEIGHT = 500;
ctx.font = "20px Calibri";
var snakeList, foodList, direction;
var snakeBody = {
width: 20,
height: 20,
color: 'purple'
};
var food = {
width: 20,
width: 20,
color: 'orange'
};
document.onkeydown = function(event) {
// 0 - Left
// 1 - Up
// 2 - Right
// 3 - Down
if (event.keyCode == 37) {
direction = 0;
console.log('0');
} else if (event.keyCode == 38) {
direction = 1;
console.log('1')
} else if (event.keyCode == 39) {
direction = 2;
console.log('2')
} else if (event.keyCode == 40) {
direction = 3;
console.log('3')
}
}
drawSnake = function(sb, i) {
ctx.save();
if (i == 0) {
ctx.fillStyle = 'black';
} else {
ctx.fillStyle = snakeBody.color;
}
ctx.fillRect(sb.x, sb.y, snakeBody.width, snakeBody.height);
ctx.restore();
}
drawFood = function(f, i) {
ctx.save();
ctx.fillStyle = food.color;
ctx.fillRect(f.x, f.y, food.width, food.height);
ctx.restore();
}
var updateSnakeList = function() {
for (let i = snakeList.length; i >= 0; i++) {
if (direction == 0) {
if (i == 0) {
snakeList[i].x = snakeList[i].x - 5
} else {
snakeList[i].x = snakeList[i - 1].x
snakeList[i].y = snakeList[i - 1].y
}
} else if (direction == 1) {
if (i == 0) {
snakeList[i].x = snakeList[i].y - 5
} else {
snakeList[i].x = snakeList[i - 1].x
snakeList[i].y = snakeList[i - 1].y
}
} else if (direction == 2) {
if (i == 0) {
snakeList[i].x = snakeList[i].x + 5
} else {
snakeList[i].x = snakeList[i - 1].x
snakeList[i].y = snakeList[i - 1].y
}
} else if (direction == 3) {
if (i == 0) {
snakeList[i].x = snakeList[i].y + 5
} else {
snakeList[i].x = snakeList[i - 1].x
snakeList[i].y = snakeList[i - 1].y
}
}
}
}
var updateSnakePosition = function() {
ctx.clearRect(0, 0, WIDTH, HEIGHT);
snakeList.forEach(drawSnake);
updateSnakeList();
}
var startGame = function() {
snakeList = [{
x: 220,
y: 200
}, {
x: 210,
y: 200
}, {
x: 200,
y: 200
}];
foodList = [];
direction = 99;
setInterval(updateSnakePosition, 1000)
}
startGame();
</script>
</body>
</html>
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