Package Class

using System;
using System.IO;
using File = System.IO.File;
using System.Runtime.InteropServices;
using Unigine;

/*
 */
class UnigineApp {
	
	/*
	 * Create a class and inherit if from Unigine.Package
	 */
	class MyPackage : Package {
		
		private FileStream file;
		
		// list of files
		public override int getNumFiles() {
			Log.warning("MyPackage.getNumFiles(): called\n");
			return 2;
		}
		
		public override string getFileName(int num) {
			Log.warning("MyPackage.getFileName({0}): called\n",num);
			if(num == 0) return "data/package.cpp";
			if(num == 1) return "data/package.world";
			return "";
		}
		
		// select file
		public override int selectFile(string name,out int size) {
			
			Log.warning("MyPackage.selectFile(\"{0}\",): called\n",name);
			
			try {
				file = null;
				if(name == "data/package.cpp") file = File.OpenRead("my_data/package.cpp");
				if(name == "data/package.world") file = File.OpenRead("my_data/package.world");
			}
			catch(Exception e) {
				Log.error("MyPackage.selectFile(): {0}\n",e.Message);
				size = 0;
				return 0;
			}
			
			size = (int)file.Length;
			
			return 1;
		}
		
		// read file
		public override int readFile(IntPtr data,int size) {
			
			Log.warning("MyPackage.readFile(,{0}): called\n",size);
			
			try {
				byte[] src = new byte[size];
				int ret = file.Read(src,0,size);
				Marshal.Copy(src,0,data,ret);
			}
			catch(Exception e) {
				Log.error("MyPackage.readFile(): {0}\n",e.Message);
				return 0;
			}
			
			return 1;
		}
	}
	
	/*
	 */
	[STAThread]
	static void Main(string[] args) {
		
		// initialize wrapper
		Wrapper.init();
		
		// create an instance of the MyPackage class and add it to the FileSystem
		MyPackage package = new MyPackage();
		FileSystem.preloadExternPackage(package);
		
		// initialize engine
		Engine engine = Engine.init(Engine.VERSION,args);
		
		// enter main loop
		engine.main();
		
		// shutdown engine
		Engine.shutdown();
	}
}

int init() {
	
	log.message("\n");
	
	log.message("Hello from My C# Package\n");
	engine.dialogMessage("Package");
	
	return 1;
}

MyPackage.selectFile("data/package.cpp",): called
MyPackage.readFile(,866): called
MyPackage.selectFile("data/package.cpp",): called
MyPackage.readFile(,866): called
Loading "data/package.cpp" 4ms
MyPackage.selectFile("data/package.world",): called
MyPackage.readFile(,62): called
Loading "data/package.world" 0ms

Hello from My C# Package