C# example to load Doom WAD file

	using System;
	using System.IO;
	namespace waddy
	{
	class Program
	{
	static string GetString(byte[] arr)
	{
	return System.Text.ASCIIEncoding.ASCII.GetString(arr);
	}
	static void Main(string[] args)
	{
	Console.WriteLine("Hello World!");
	if (File.Exists("DOOM.WAD"))
	{
	using (BinaryReader reader = new BinaryReader(File.Open("DOOM.WAD", FileMode.Open)))
	{
	string name = GetString(reader.ReadBytes(4));
	int numberOfLumps = reader.ReadInt32();
	int folderPosition = reader.ReadInt32();
	reader.BaseStream.Seek(folderPosition, SeekOrigin.Begin);
	Console.WriteLine(name);
	Console.WriteLine("Contains " + numberOfLumps + " lumps");
	int count = 0;
	while (reader.BaseStream.Position < reader.BaseStream.Length)
	{
	reader.BaseStream.Seek(folderPosition + (16 * count), SeekOrigin.Begin);
	int filePos = reader.ReadInt32();
	int fileSize = reader.ReadInt32();
	string lumpName = GetString(reader.ReadBytes(8));
	//Console.WriteLine("Next lump pos is " + filePos);
	//Console.WriteLine("Next lump size is " + fileSize);
	Console.WriteLine("Next lump name is " + lumpName);
	//reader.BaseStream.Seek(filePos + 12, SeekOrigin.Begin);
	count++;
	}
	}
	}
	}
	}
	}

view raw WadReader.cs hosted with ❤ by GitHub

Example of bouncing ball

	var gameScreen = document.getElementById("gameScreen");
	var context = gameScreen.getContext("2d");
	context.fillStyle = "#FFFFFF";
	context.font = "8px Sans-Serif";
	context.fillText("Pong!", 10, 10);
	var ball = {
	x : 50,
	y : 50,
	width : 5,
	height : 5,
	x_direction : 1,
	y_direction : 1
	};
	var previousBall = ball;
	var boundary = {
	x1: 20,
	x2: 200,
	y1: 20,
	y2: 120
	};
	context.fillStyle = "#FF00FF";
	context.strokeStyle = "#FF00FF";
	context.strokeRect(boundary.x1, boundary.y1, boundary.x2 – boundary.x1, boundary.y2 – boundary.y1);
	var timer = setInterval(updateGameScreen, 10);
	function updateGameScreen() {
	context.clearRect(previousBall.x, previousBall.y, previousBall.width, previousBall.height);
	previousBall = ball;
	if (ball.x_direction === 1) {
	ball.x += 2;
	if (ball.x_direction === 1 && ball.x > boundary.x2 – 10) {
	ball.x_direction = –1;
	}
	}
	if (ball.x_direction === –1){
	ball.x -= 2;
	if (ball.x_direction === –1 && ball.x < boundary.x1 + 10) {
	ball.x_direction = 1;
	}
	}
	if (ball.y_direction === 1) {
	ball.y++;
	if (ball.y_direction === 1 && ball.y > boundary.y2 – 7) {
	ball.y_direction = –1;
	}
	}
	if (ball.y_direction === –1){
	ball.y—;
	if (ball.y_direction === –1 && ball.y < boundary.y1 + 7) {
	ball.y_direction = 1;
	}
	}
	context.fillRect(ball.x, ball.y, ball.width, ball.height);
	}

view raw bouncing-ball.js hosted with ❤ by GitHub