SirMike's Techblog http://sirmike.org C++, C#, ASP.NET, OpenGL, DirectX, Game developing Sun, 03 Jan 2010 15:36:20 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 dubscore.pl – my new project http://sirmike.org/2010/01/03/dubscorepl-my-new-project/ http://sirmike.org/2010/01/03/dubscorepl-my-new-project/#comments Sun, 03 Jan 2010 15:36:20 +0000 SirMike http://www.sirmike.org/2010/01/03/dubscorepl-my-new-project/ I would like to present you my new project – http://dubscore.pl It is a database of polish dubbing in computer games. Reviews, comparisons and samples – all you have got there. Enjoy!

]]> http://sirmike.org/2010/01/03/dubscorepl-my-new-project/feed/ 1 Testing code snippets for Visual Studio http://sirmike.org/2009/10/30/testing-code-snippets-for-visual-studio/ http://sirmike.org/2009/10/30/testing-code-snippets-for-visual-studio/#comments Fri, 30 Oct 2009 16:58:21 +0000 SirMike http://www.sirmike.org/?p=260 If you create many test classes and test methods you probably repeat some code many times.
Here are some code snippets that I use every day at work, feel free to modify them if you want.

Test class

PLAIN TEXT
XML:
  1. <?xml version="1.0"?>
  2. <CodeSnippets xmlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">
  3.   <CodeSnippet Format="1.0.0">
  4.     <Header>
  5.       <Title>Create a test class</Title>
  6.       <Description>This snippet adds code to create test class template.</Description>
  7.       <Shortcut>testclass</Shortcut>
  8.     </Header>
  9.     <Snippet>
  10.       <Declarations>
  11.         <Object>
  12.           <ID>Name</ID>
  13.           <ToolTip>Name of a test class</ToolTip>
  14.           <Default>Name</Default>
  15.         </Object>
  16.       </Declarations>
  17.       <Code Language="csharp"><![CDATA[[TestClass]
  18.       public class $Name$
  19.       {
  20.         $end$
  21.       }]]>
  22.       </Code>
  23.     </Snippet>
  24.   </CodeSnippet>
  25. </CodeSnippets>

Test method

PLAIN TEXT
XML:
  1. <?xml version="1.0"?>
  2. <CodeSnippets xmlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">
  3.   <CodeSnippet Format="1.0.0">
  4.     <Header>
  5.       <Title>Create a test method</Title>
  6.       <Description>This snippet adds code to create test method template.</Description>
  7.       <Shortcut>testmethod</Shortcut>
  8.     </Header>
  9.     <Snippet>
  10.       <Declarations>
  11.         <Object>
  12.           <ID>Name</ID>
  13.           <ToolTip>Name of a method which is being tested</ToolTip>
  14.           <Default>Name</Default>
  15.         </Object>
  16.         <Object>
  17.           <ID>State</ID>
  18.           <ToolTip>State of input data</ToolTip>
  19.           <Default>State</Default>
  20.         </Object>
  21.         <Object>
  22.           <ID>Result</ID>
  23.           <ToolTip>Result of an assertion</ToolTip>
  24.           <Default>Result</Default>
  25.         </Object>
  26.       </Declarations>
  27.       <Code Language="csharp"><![CDATA[[TestMethod]
  28.       public void $Name$_$State$_$Result$()
  29.       {
  30.         $end$
  31.       }]]>
  32.       </Code>
  33.     </Snippet>
  34.   </CodeSnippet>
  35. </CodeSnippets>

Rhino mocks record / playback routine

PLAIN TEXT
XML:
  1. <?xml version="1.0"?>
  2. <CodeSnippets xmlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">
  3.   <CodeSnippet Format="1.0.0">
  4.     <Header>
  5.       <Title>Create a record / playback routine for rhino mocks</Title>
  6.       <Description>This snippet adds code to create record / playback routine for unit testing.</Description>
  7.       <Shortcut>recordplayback</Shortcut>
  8.     </Header>
  9.     <Snippet>
  10.       <Declarations>
  11.         <Object>
  12.           <ID>mocks</ID>
  13.           <ToolTip>Mock repository object name</ToolTip>
  14.           <Default>mocks</Default>
  15.         </Object>
  16.       </Declarations>
  17.       <Code Language="csharp">
  18.         <![CDATA[using(mocks.Record())
  19.             {
  20.             $end$
  21.             }
  22.             using(mocks.Playback())
  23.             {
  24.             }
  25. ]]>
  26.       </Code>
  27.     </Snippet>
  28.   </CodeSnippet>
  29. </CodeSnippets>

Throw ArgumentNullException when a method's argument cannot be null

PLAIN TEXT
XML:
  1. <?xml version="1.0"?>
  2. <CodeSnippets xmlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">
  3.   <CodeSnippet Format="1.0.0">
  4.     <Header>
  5.       <Title>Create argument null checking routine</Title>
  6.       <Description>This snippet adds code to create a code to check whether param was null ane throw an exception when applicable.</Description>
  7.       <Shortcut>checkparam</Shortcut>
  8.     </Header>
  9.     <Snippet>
  10.       <Declarations>
  11.         <Object>
  12.           <ID>parameter</ID>
  13.           <ToolTip>parameter</ToolTip>
  14.           <Default>parameter</Default>
  15.         </Object>
  16.       </Declarations>
  17.       <Code Language="csharp"><![CDATA[if ($parameter$ == null)
  18. {
  19.   throw new ArgumentNullException("$parameter$");
  20. }
  21.       ]]>
  22.       </Code>
  23.     </Snippet>
  24.   </CodeSnippet>
  25. </CodeSnippets>

]]> http://sirmike.org/2009/10/30/testing-code-snippets-for-visual-studio/feed/ 0 Podcast http://sirmike.org/2009/08/23/podcast/ http://sirmike.org/2009/08/23/podcast/#comments Sun, 23 Aug 2009 13:46:37 +0000 SirMike http://www.sirmike.org/2009/08/23/podcast/ I have been busy for the last few weeks so no interesting posts had appeared. Sorry for that :( But there there is something for my polish readers - two podcasts (polish only) which I have recorded with my friends recently. Podcasts are about games of course and are strongly related to Polygamia forum users :)

Here's the official forum topic:

And official news at polygamia.pl:

Podcasts are ready to download at: http://www.sirmike.org/files/forumogadka/

]]> http://sirmike.org/2009/08/23/podcast/feed/ 0 log4net – Exception renderer http://sirmike.org/2009/06/12/log4net-exception-renderer/ http://sirmike.org/2009/06/12/log4net-exception-renderer/#comments Fri, 12 Jun 2009 20:25:57 +0000 SirMike http://www.sirmike.org/?p=251 If you use log4net you have probably noticed that this logger does not write information from exception's "Data" property. Here is the renderer which does:

PLAIN TEXT
C#:
  1. using System;
  2. using System.Collections.Generic;
  3. using System.IO;
  4. using System.Text;
  5. using log4net.ObjectRenderer;
  6.  
  7. namespace SomeNamespace
  8. {
  9.     public class ExceptionRenderer : IObjectRenderer
  10.     {
  11.         #region IObjectRenderer Members
  12.  
  13.         public void RenderObject(RendererMap rendererMap, object obj, TextWriter writer)
  14.         {
  15.             if (rendererMap == null)
  16.             {
  17.                 throw new ArgumentNullException("rendererMap");
  18.             }
  19.  
  20.             if (obj == null)
  21.             {
  22.                 throw new ArgumentNullException("obj");
  23.             }
  24.  
  25.             if (writer == null)
  26.             {
  27.                 throw new ArgumentNullException("writer");
  28.             }
  29.  
  30.             if (obj is Exception)
  31.             {
  32.                 Exception ex = (Exception)obj;
  33.                 writer.WriteLine(ex.ToString());
  34.  
  35.                 if (ex.Data.Count> 0)
  36.                 {
  37.                     writer.WriteLine("Exception Data:");
  38.                 }
  39.                 foreach (string key in ex.Data.Keys)
  40.                 {
  41.                     writer.WriteLine("\t {0} = {1}", key, rendererMap.FindAndRender(ex.Data[key]));
  42.                 }
  43.             }
  44.             else
  45.             {
  46.                 throw new InvalidOperationException(string.Format("Object of type {0} cannot be rendered with ExceptionRenderer", obj.GetType()));
  47.             }
  48.         }
  49.  
  50.         #endregion
  51.     }
  52. }

and the configuration needed for this to work is:

PLAIN TEXT
XML:
  1. <log4net>
  2. ...
  3.     <renderer renderingClass="SomeNamespace.ExceptionRenderer" renderedClass="System.Exception" />
  4. ...
  5. </log4net>

Sample output for NullReferenceException with Data["configPath"] = "myconfig.config":

2009-06-12 22:22:04,038 INFO  [LoggerTest.Program] - Exception during init
System.NullReferenceException: Something was null
   at LoggerTest.Program.Main(String[] args) in G:\C#\Temp\LoggerTest\Program.cs:line 26
Exception Data:
         configPath = myconfig.config

Feel free to use and modify it.

]]> http://sirmike.org/2009/06/12/log4net-exception-renderer/feed/ 0 Playing with physics http://sirmike.org/2009/05/11/playing-with-physics/ http://sirmike.org/2009/05/11/playing-with-physics/#comments Sun, 10 May 2009 23:30:55 +0000 SirMike http://www.sirmike.org/2009/05/11/playing-with-physics/ Several hours of playing with nVidia PhysX engine ended with this small video. Rendered in real time of course (DirectX, GeForce 8600GT)

]]> http://sirmike.org/2009/05/11/playing-with-physics/feed/ 2 Creating enum which sucks http://sirmike.org/2009/04/22/creating-enum-which-sucks/ http://sirmike.org/2009/04/22/creating-enum-which-sucks/#comments Wed, 22 Apr 2009 20:53:33 +0000 SirMike http://www.sirmike.org/2009/04/22/creating-enum-which-sucks/ We create many enumerations in our programs. But sometimes we can make a mistake that drives somebody else mad.

Let's suppose that the first programmer created an enum like this:

PLAIN TEXT
C#:
  1. enum Mood
  2. {
  3.     Unknown = -1,
  4.     Awesome,
  5.     Cool,
  6.     Bad,
  7.     Awful
  8. }

It does not look bad at the first look, yet another enum.

Another programmer created a list:

PLAIN TEXT
C#:
  1. List<mood> availableMoods = new List<mood>();
  2. availableMoods.Add(Mood.Awful);
  3. availableMoods.Add(Mood.Bad);

Then he would like to find there a first mood type which is a part of "good mood" group and pass the result to another layer of an application. He wrote the code:

PLAIN TEXT
C#:
  1. Mood found = availableMoods.Find(
  2.     delegate(Mood f)
  3.     {
  4.         return f == Mood.Awesome || f == Mood.Cool;
  5.     }
  6. );

Now he realized that it cannot work because Find method of a List(T) class returns default(T) when a list does not contain desired item. In this case he would get Mood.Awesome because it is the default value of the enum. I do not need to add that the Mood.Awesome is not even the part of the list.

We can solve this problem by several different approaches.

  1. Create different enum where the default element will be "Unknown = 0"
  2. Use FindIndex method of List(T) class so we will be able to handle the situation of not found element
  3. I believe that other approaches could work as well

The question to discuss - which programmer made a mistake? The first one who created "unfortunate" enum or the second one who used wrong structure / wrong searching method?

]]> http://sirmike.org/2009/04/22/creating-enum-which-sucks/feed/ 1 Unit testing and objects equality http://sirmike.org/2009/02/16/unit-testing-and-objects-equality/ http://sirmike.org/2009/02/16/unit-testing-and-objects-equality/#comments Mon, 16 Feb 2009 12:40:56 +0000 SirMike http://www.sirmike.org/?p=232 Let's assume that we have a class like below:

PLAIN TEXT
C#:
  1. public class Foo : IEquatable<Foo>
  2.     {
  3.         private int variable;
  4.  
  5.         public int Variable
  6.         {
  7.             get { return variable; }
  8.             set { variable = value; }
  9.         }
  10.  
  11.         #region IEquatable<Foo> Members
  12.  
  13.         public bool Equals(Foo other)
  14.         {
  15.             return this.variable == other.Variable;
  16.         }
  17.  
  18.         #endregion
  19.     }

and a unit test for that:

PLAIN TEXT
C#:
  1. [TestClass()]
  2.     public class FooTest
  3.     {
  4.         [TestMethod()]
  5.         public void EqualsTest()
  6.         {
  7.             Foo one = new Foo();
  8.             one.Variable = 5;
  9.             Foo two = new Foo();
  10.             two.Variable = 5;
  11.  
  12.             Assert.AreEqual<Foo>(one, two, "AreEqual<Foo> failed");
  13.             Assert.AreEqual(one, two, "AreEqual failed");
  14.             Assert.AreSame(one, two, "AreSame failed");
  15.         }
  16.     }

and a question is - which Assert fails? All of them o_O
I could not find an explanation why implemented Equals method is not called. Framework always calls default Equals(object)

]]> http://sirmike.org/2009/02/16/unit-testing-and-objects-equality/feed/ 4 Ballet of PES http://sirmike.org/2009/02/08/ballet-of-pes/ http://sirmike.org/2009/02/08/ballet-of-pes/#comments Sun, 08 Feb 2009 20:06:28 +0000 SirMike http://www.sirmike.org/2009/02/08/ballet-of-pes/ My PES replays - Enjoy ;)

]]> http://sirmike.org/2009/02/08/ballet-of-pes/feed/ 1 Programmers dialog http://sirmike.org/2009/01/08/programmers-dialog/ http://sirmike.org/2009/01/08/programmers-dialog/#comments Thu, 08 Jan 2009 16:25:57 +0000 SirMike http://www.sirmike.org/2009/01/08/programmers-dialog/ Perfect dialog which I heard today at work (translated from Polish but the meaning is the same):

D - database programmer, P - C# programmer

D: OK, it should probably work
P: It seems that it probably works

I'm afraid that result of their work will be moved to a production environment in a next few days :D

]]> http://sirmike.org/2009/01/08/programmers-dialog/feed/ 6 Shadow Mapping http://sirmike.org/2008/12/14/shadow-mapping/ http://sirmike.org/2008/12/14/shadow-mapping/#comments Sun, 14 Dec 2008 20:39:03 +0000 SirMike http://www.sirmike.org/?p=222 I added new effect to my effects library - Shadow Mapping. Simple version without any additional techniques for soft edges.

Go to the Shadow Mapping page

]]> http://sirmike.org/2008/12/14/shadow-mapping/feed/ 1