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
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>
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
Django
The Web framework for perfectionists with deadlines.
Laravel
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
Microsoft
Open source projects and samples from Microsoft.
Google
Google ❤️ Open Source for everyone.
Alibaba
Alibaba Open Source for everyone
D3
Data-Driven Documents codes.
Tencent
China tencent open source team.