Kai Bürger & Polina Kondratieva – Computer Graphics and Visualization Group computer graphics &...

Kai Bürger & Polina Kondratieva – Computer Graphics and Visualization GroupKai Bürger & Polina Kondratieva – Computer Graphics and Visualization Group

computer graphics & computer graphics & visualizationvisualization

Practical Course SS07Global Illumination Effects / C#

Introduction


Kai Bürger & Polina Kondratieva – Computer Graphics and Kai Bürger & Polina Kondratieva – Computer Graphics and Visualization GroupVisualization Group

Organizational…

• everybody here, who is supposed to be here ?

• who else is here?

• Schedule:- Tue. 11:30 – 12.30

- Question time (Thursday 10:30-12:00 )?

• If you have a question:- forum

- question time

- Email

- appear in person



.NET Framework: ObjectivesTo provide:

To ensure :

• Consistent object-oriented programming environmentno matter how the locally stored object code is executed:(locally, locally but Internet-distributed, or remotely).

• Code-execution environment that:

− minimizes software deployment and versioning conflicts,

− promotes safe execution of code,

− eliminates the performance problems of scripted/interpreted environments.

• Integrability of the .NET Framework code with any other code according to industry standards.



.NET Framework in context



DotNet, CLR, MSIL, C# … etc.

See http://www.dotnetframework.de/default2.aspx?start=http://www.dotnetframework.de/dotnet/DOTNET_Framework_Einfuehrung.asp

VB.NETQuellcode

C#Quellcode

Andere.NET-fächige

Sprache

C++Quellcode

Andere nicht.NET-fächige

Sprache

Unmanaged code

Managed

code

MSIL-code

VB.NETCompiler

C#Compiler

Compiler VC++Compiler 7.0

Microsoft Intermediate Language (MSIL)[DATEI]

Just-In-Time-Compiler (JIT)(Teil der Common Language Runtime)

Native Code[RAM]

Managed

code

Managed

code

Managed

code

Native Code(NativeImage)

[Datei]

Native Code[Datei]

Betriebssystem

Compiler



Java (J2EE) vs. .NET: Performance



Java (J2EE) vs. .NET: Portability

• Java– Multi platform (available for every OS)

– „Not really“ multi language

• .NET– „Not really“ multi platform ( ROTOR, MONO)

– Multi Language (C++, C#, J#, Basic, Delphi …)



Java (J2EE) vs. .NET: Future

• Java– well established

– a lot of applications already exist (including Applets)

• .NET– Microsoft's choice for Windows Longhorn (XP)

– a lot of applications are ported to .NET



Native Code vs. .NET: Performance

• Native Code, the compiler– usually compiles everything only once

– has much time to optimize code

– has no idea of the target machine

– can’t do runtime optimization on it’s own

• .NET, the JIT …– compiles every USED method ONCE per program execution

– needs to be fast

– knows the target machine well

– knows the program’s behavior

See: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndotnet/html/dotnetperftechs.asp



Let‘s get started …

• you need:– Windows XP/2003 (Windows ME/98/2000 not supported)

– .NET Framework 1.1 (SDK not needed)

– Visual Studio 2003, 2005

Use the systems in our lab!!!



C#...• C# is a type-safe object-oriented language.

• Curly-brace syntax is very similar to C, C++ or Java.

• C# syntax simplifies many of the complexities of C++.

• C# provides powerful features:

- nullable value types, enumerations, delegates,anonymous methods and direct memory access.

- supports generic methods and types, and iterators.

• C# supports encapsulation, inheritance and polymorphism.

• A class may inherit directly from one parent class, but it may implement any number of interfaces.

• In C#, a struct is a „lightweight class“, which can implement interfaces but does not support inheritance.



C#...• Use process "Interop." to interact with other Windows

software (e.g. COM objects, native Win32 DLLs).

• „Interop.“ enables C# programs to do just about anything that a native C++ application can do.

• C# supports pointers and the concept of "unsafe" code(for those cases in which direct memory access is absolutely critical).

• C# build process is simple (vs. C, C++), flexible (vs. Java).

• There are no separate header files, and no strict order for methods and types.

• A C# source file may define any number of classes, structs, interfaces, and events.



C#: new constructs

• Encapsulated method signatures called delegates, which enable type-safe event notifications.

• Properties, which serve as accessors for private member variables (set/get).

• Attributes, which provide declarative metadata about types at run time.

• Inline XML documentation comments.



Hello World

using System;

namespace HelloWorldApplication

{

/// <summary>

/// This class is really boring since it only prints „Hello World“

/// </summary>

class HelloWorld

{

/// <summary>

/// The Main Method is the entry point for the app

/// </summary>

[STAThread]

static void Main(string[] args)

{

Console.WriteLine("Hello World");

}

}

}



Hello World Form using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;

namespace HelloWorldForm{

public class Form1 : System.Windows.Forms.Form{

private System.Windows.Forms.Label label1;private System.ComponentModel.Container components = null;

public Form1(){

InitializeComponent();label1.Text = "Hello World";

}

protected override void Dispose( bool disposing ){

if( disposing ) if (components != null)

components.Dispose();base.Dispose( disposing );

}



Hello World Form (cont.) private void InitializeComponent()

{label1 = new System.Windows.Forms.Label();SuspendLayout();label1.Location = new System.Drawing.Point(164,

68);label1.Name = "label1";label1.TabIndex = 0;label1.Text = "label1";AutoScaleBaseSize = new System.Drawing.Size(5,

13);ClientSize = new System.Drawing.Size(420, 158);Controls.Add(label1);Name = "Form1";Text = "Hello Application";ResumeLayout(false);

}

[STAThread]static void Main() {

Application.Run(new Form1());}

}}



Java (J2EE) vs. .NET: Code words

ms-help://MS.VSCC.2003/MS.MSDNQTR.2004JAN.1033/dncenet/html/tchCJavaComparingProgrammingLanguages.htm#tchCJavaKeywordComparison

C# Keyword Java Keyword

Base super

Bool boolean

Is instanceof

lock synchronized

namespace package

readonly const

sealed final

using import

internal private

: extends

: implements

Not Supported by C#

native

transient



References—http://www.dotnetframework.de/default2.aspx?start=http://

www.dotnetframework.de/dotnet/DOTNET_Framework_Einfuehrung.asp

—E. Schanzer, Performance Considerations for Run-Time Technologies in the .NET Framework, Microsoft Corporation, August 2001.

—S. T. Kachru, On the Relative Advantages of Teaching Web Services in .NET vs. J2EE, Master Thesis, North Carolina State University, Aug. 2003.

— J2EE and .NET Application Server and Web Services Benchmark, Middleware company, Oct. 2002.

— J2EE and .NET (Reloaded) Yet Another Performance Case Study, Middleware company, Jun. 2003.

—H. Mössenböck, Introduction to C#, University of Linz, Austria.

—H. Mössenböck, Advanced C#, University of Linz, Austria.

—D. Marshall, Visual C# 2005: The Language, Microsoft Press, 2006.

—Microsoft Visual Studio 2005 Documentation

— . . .

Date post:	28-Dec-2015
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