Praktikum im Bereich Praktische Informatik Entwicklung eines Ray-Tracing Systems. computer graphics & visualization

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Cameron Gilbert
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1 Praktikum im Bereich Praktische Informatik Entwicklung eines Ray-Tracing Systems

Organizational Weekly Assignments + Preliminary discussion: Tuesdays 15:30-17:00 in room MI 02.13.

2 Organizational Weekly Assignments + Preliminary discussion: Tuesdays 15:30-17:00 in room MI Assignment deadline on Monday at 23:59 Closing date has to be met strictly! Preferably groups of 2 students Group arrangements by the 22th of April the latest Hard-/software available in room MI

3 Organizational If you have a question: 1. Use the discussion forum on the course homepage 2. Visit the weekly question time (appointment?) 3. Contact us per 4. Appear in person at our office

4 Organizational To pass the course / obtain a certificate Orderly solution to all assignments on schedule! Your grade will be determined by the quality of your solutions and a small oral examination at the end of the semester

5 Organizational Comment the code in your solutions in detail! Use #region-tags or comments to help us localizing assignment specific part in your sourcecode. e.g: //A1_2b (for subtask 2b of assignment 1) or #region A1_2b //your code here #endregion Use XML (documentation) comments to describe methods and their parameters in detail!

6 Provide: Framework: Objectives Consistent object-oriented programming environment no 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 performance problems of scripted/interpreted environments Ensure: Integrability of the.net Framework code with any other code according to industry standards

7 Framework in context

8 Framework components.net Framework Common Language Runtime Web Services XML Support Base Classes Code Management Memory Management Web Forms (ASP.NET) Windows Forms (GDI+) Common Language Runtime (CLR) Data (ADO.NET) IL-JIT-Compiler Developer services Process management Security System Type management COM interop

9 Framework VB.NET sourcecode C# sourcecode other.net-capable languages C++ sourcecode Other not.net-capable languages VB.NET Compiler C# Compiler Compiler VC++ Compiler 7.0 Unmanaged code Compiler Managed code Managed code Managed code Managed code MSIL-code Microsoft Intermediate Language (MSIL) [File] Just-In-Time-Compiler (JIT) (poart of the Common Language Runtime) Native Code (NativeImage) [File] Native Code [RAM] Native Code [File] Operating system See

10 CLI/CTS: Common type system Types Value Types Reference Types Enumerations Pointer Self Describing Types Interfaces User Value Types System Value Types Classes Arrays Delegates User-Defined Boxed values Stack Heap

11 Java: vs. JAVA(J2EE) : Portability multi platform (available for every OS) not really multi language.net: not really multi platform (ROTOR, MONO) multi language (C++, C#, J#, Visual Basic, Delphi, )

12 .NET, the JIT vs. Native Code: Performance compiles every used method once per program execution knows the target machine well knows the programs behaviour 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

13 C#: The prefered.net language 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, 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 (located on the stack).

14 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 C# source files may define any number of classes, structs, interfaces, events

15 C#: familiarize with new constructs! Properties, which serve as accessors for private member variables (set/get) Inline XML documentation comments ( Doc / intellisense) Attributes, which provide declarative metadata about types at run time Encapsulated method signatures called delegates, which enable type-safe event notifications (comparable to function pointer in C++!)

16 vs. JAVA (J2EE): Keywords C# Keyword Java Keyword base super bool boolean is instanceof lock synchronized namespace package sealed final using import internal private : extends : implements n.a native n.a transient All.NET 3.0 keywords:

Hello World using System; namespace HelloWorldApplication { /// <summary> /// This class is really boring since it only prints Hello World /// </summary> } class

17 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"); }

18 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 private void InitializeComponent() { label1 = new System.Windows.Forms.Label(); SuspendLayout(); label1.location = new System.Drawing.Point(164, 68); label1.name = "label1"; label1.

19 Hello World Form 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()); }

20 Exercise 1 : Class Designer Create a new project (Visual C# Class-Library), and prepare your workspace:

21 Exercise 1

22 Exercise 2: GUI Create a new Windows-Application for C# within Visual Studio Add following control elements to the main window: Two Panel components Six TextBox components One PictureBox component Two RadioButton components Six Button components

23 Exercise 2: exemplary GUI

24 Exercise 2 Add a new structure to the namespace to store the textbox values Add properties to access the private data fields Add a constructor and 2 methods LoadValues(), SaveValues() This struct will be used to easily store application parameters in a configuration file!

25 Exercise 2 Add methods for the TextBoxes to process user input Parse a TextBox content whenever it s edited (catch invalid input!) Convert the input to double and set the corresponding struct value Set the TextBox.Text, use following code to ensure a consistent decimal delimiter TextBox.Text = TextBox.Text.Replace(".", System.Globalization.NumberFormatInfo.CurrentInfo.NumberDecimalSeparator); TextBox.Text = TextBox.Text.Replace(,", System.Globalization.NumberFormatInfo.CurrentInfo.NumberDecimalSeparator); Add onclick events for the Save/Load buttons and call the the corresponding LoadValues(), SaveValues() methods of the parameter structure. Close the window if the button Close is pressed. Restore TextBox and struct values to default parameters when the Reset button is pressed

Exercise 2: XML Serialization Familiarize yourself with following namespaces: System.Xml.Serialization provides methods to store/read member values of a class instances in/from XML-Documents System.

26 Exercise 2: XML Serialization Familiarize yourself with following namespaces: System.Xml.Serialization provides methods to store/read member values of a class instances in/from XML-Documents System.IO provides read write operations to disc Add content to the FragmentParameters struct methods SaveValues() and LoadValues() using XmlSerializer and StreamWriter/StreamReader to serialize its content to/from a XML configuration file. e.g:

27 References C# documentation / literature D. Marshall, Visual C# 2005: The Language, Microsoft Press, H. Mössenböck, Introduction to C#, University of Linz, Austria. H. Mössenböck, Advanced C#, University of Linz, Austria.

Web Services in.net (1)

Web Services in.net (1) These slides are meant to be for teaching purposes only and only for the students that are registered in CSE4413 and should not be published as a book or in any form of commercial