private static String loadShader( String fileName )
	{
		StringBuilder shaderSource = new StringBuilder();
		BufferedReader shaderReader = null;
		final String INCLUDE_DIRECTIVE = "#include";

		try
		{
			shaderReader = new BufferedReader( new FileReader( "./res/shaders/" + fileName ) );
			String line;

			while ( ( line = shaderReader.readLine() ) != null )
			{
				if ( line.startsWith( INCLUDE_DIRECTIVE ) )
				{
					shaderSource.append( loadShader( line.substring( INCLUDE_DIRECTIVE.length() + 2, line.length() - 1 ) ) );
				}
				else
					shaderSource.append( line ).append( "\n" );
			}

			shaderReader.close();
		}
		catch ( Exception e )
		{
			e.printStackTrace();
			System.exit( 1 );
		}


		return shaderSource.toString();
	}