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• CodePlex Daily Summary for Monday, July 29, 2013

  CodePlex Daily Summary for Monday, July 29, 2013Popular ReleasesGIS Raster Tile Normalizer for GeoServer: V110 Extended to tile DEMs: 1) Now imports large DEM datasets. They are stored as 3.25 degree tiles in GeoTIFF 32 bit single band tiles ready to be used by GeoServer. Also, parallel colorized hillshade tiles are optionally created for easy visualization in GeoServer. 2) No longer uses FWTools, but the more recent 32 bit Windows 1.9 GDAL installation from Tamas at http://www.gisinternals.com/sdk/. Also required is Python 2.7, the GDAL Python Bindings from Tamas, and the Numpy python libraries. This is because we use th...R.NET: R.NET 1.5: The major changes in v1.5 are: Initialize method must be called before using R. Settings should be passed to the method. EagerEvaluate method renamed to Evaluate (use Defer method when you want old version of Evaluate).TX264: 0.9.7: --0.9.7 -Added: Encoding time will be shown in the log -Added: 64bit FLAC.exe -Added: Tx264 will now write version info file to its own folder -Added: Option to set encoder priorties (thx to XanaMuui&Ruriko) -Fixed: A possible error where source files were deleted -Updated: x264 to rev2345 -Updated: MediaInfo to 0.7.64 -Updated: MkvToolNix to 6.3.0 -Updated: FLAC to 1.3.0 -Updated: AlphaControls to 8.42 Stable -Updated: QAAC to 2.19 -Updated: SoX build with unicode by Lord_MulderMedia Companion: Media Companion MC3.574b: Some good bug fixes been going on with the new XBMC-Link function. Thanks to all who were able to do testing and gave feedback. New:* Added some adhoc extra General movie filters, one of which is Plot = Outline (see fixes above). To see the filters, add the following line to your config.xml: <ShowExtraMovieFilters>True</ShowExtraMovieFilters>. The others are: Imdb in folder name, Imdb in not folder name & Imdb not in folder name & year mismatch. * Movie - display <tag> list on browser tab ...OfflineBrowser: Preview Release with Search: I've added search to this release.VG-Ripper & PG-Ripper: VG-Ripper 2.9.46: changes FIXED LoginMath.NET Numerics: Math.NET Numerics v2.6.0: What's New in Math.NET Numerics 2.6 - Announcement, Explanations and Sample Code. New: Linear Curve Fitting Linear least-squares fitting (regression) to lines, polynomials and linear combinations of arbitrary functions. Multi-dimensional fitting. Also works well in F# with the F# extensions. New: Root Finding Brent's method. ~Candy Chiu, Alexander Täschner Bisection method. ~Scott Stephens, Alexander Täschner Broyden's method, for multi-dimensional functions. ~Alexander Täschner ...AJAX Control Toolkit: July 2013 Release: AJAX Control Toolkit Release Notes - July 2013 Release Version 7.0725July 2013 release of the AJAX Control Toolkit. AJAX Control Toolkit .NET 4.5 – AJAX Control Toolkit for .NET 4.5 and sample site (Recommended). AJAX Control Toolkit .NET 4 – AJAX Control Toolkit for .NET 4 and sample site (Recommended). AJAX Control Toolkit .NET 3.5 – AJAX Control Toolkit for .NET 3.5 and sample site (Recommended). Notes: - Instructions for using the AJAX Control Toolkit with ASP.NET 4.5 can be found at...MJP's DirectX 11 Samples: Specular Antialiasing Sample: Sample code to complement my presentation that's part of the Physically Based Shading in Theory and Practice course at SIGGRAPH 2013, entitled "Crafting a Next-Gen Material Pipeline for The Order: 1886". Demonstrates various methods of preventing aliasing from specular BRDF's when using high-frequency normal maps. The zip file contains source code as well as a pre-compiled x64 binary.English Practice Helper: English Practice Helper Demo v1.1: Fix some bug in sentences compareKartris E-commerce: Kartris v2.5003: This fixes an issue where search engines appear to identify as IE and so trigger the noIE page if there is not a non-responsive skin specified.Blue Mercs Data Gateway: Blue Mercs Data Gateway 2.0: Changes made for major release v2.0 build in support for Microsoft Access Database build in logging support (with optional stopwatch duration) implemented thread DbContext that can be referenced to share context accross layers implented 'having' sql keyword implemented 'top(n)' and 'first' sql keywords implemented 'distinct' sql keyword implemented sql column expressions implemented CTE (common table expressions) joins are refactored allow auto join on keys when using entiti...Wix Test: WIX Test Bootstrapper (Burn): WIX Test Bootstrapper and MSI setup files. Alfa versions.ScriptZilla: ScriptZilla 1.2.5.1: New Programming Languages(C++ too !) and An Better Editor.SSISConnectionBuilder: Alpha 2: Removed SSIS SDK dependencies.VBDownloader: VBDownloader 1.0: VBDownloader v1.0 The open source solution for downloads First releasemysqllib: mysqllib 1.5: La nuova versione 1.5 vede espandersi questa libreria con nuovi metodi e nuove caratteristiche interessanti. Ecco i cambiamenti: (NEW) Aggiunta classe MySqlTable per visualizzare tutti i dettagli della tabella, tra cui una lista di dettagli delle colonne (NEW) Aggiunta classe MySqlColumn per visualizzare tutti i dettagli della colonna, tra cui una lista dei valori della colonna (NEW) Nuovi metodi GetTable(...) e GetColumn(...) per risultati dettagliati di tabelle e colonne (NEW) Nuovi met...GoAgent GUI: GoAgent GUI 1.3.5 Alpha (20130723): ????????Alpha?，???????????，?????????????。 ??????????GoAgent???（???phus lu?GitHub??????GoAgent??????，??????????????????） ????????????????????????Bug ?????????。??????????????。 ????issue????，????????，????????????????。LogicCircuit: LogicCircuit 2.13.07.22: Logic Circuit - is educational software for designing and simulating logic circuits. Intuitive graphical user interface, allows you to create unrestricted circuit hierarchy with multi bit buses, debug circuits behavior with oscilloscope, and navigate running circuits hierarchy. Changes of this versionYou can make visual elements of the circuit been visible on its symbols. This way you can build composite displays, keyboards and reuse them. Please read about displays for more details http://ww...LINQ to Twitter: LINQ to Twitter v2.1.08: Supports .NET 3.5, .NET 4.0, .NET 4.5, Silverlight 4.0, Windows Phone 7.1, Windows Phone 8, Client Profile, Windows 8, and Windows Azure. 100% Twitter API coverage. Also supports Twitter API v1.1! Also on NuGet.New Projects#Zyan Drench, a game for Android: Zyan Drench is a simple yet very entertaining game for Android phones developed using Zyan Communication Framework: http://zyan.com.de Crzy Game Launcher: All in one game launcher and updater. Keep your game up-to-date with this simple to use launcher.Ecobee API: This project is a portable .NET Library wrapping the Ecobee Thermostat API.Fire-Fighting Kinect Game: Fire-Fighting Kinect Game A fire-fighting game that uses Vizard virtual reality software and the Microsoft Kinect to allow the player to put out virtual fires.Fish Atlantis: This is our homework.FreeBee 900 Pro - Open Source XBee® Pro Alternative: https://hg.codeplex.com/freebee900proFuelRex: FuelRex foi feito pra lhe ajudar em seu dia a dia. Facilite seus cálculos e obtenha números reais sobre o gasto de combustíveis, em um aplicativo totalmente.KbdPlayground: A collection of .NET helpers and experimentsMailChimpNET: MailChimpNET provides a .NET PCL based wrapper around the mailchimp.com web API.MVC Generator: Addin for Visual Studio that generates MVC from Entity Framework files. A Rapid Scaffolder with options.One More ENgine project: OMEN projet (One More ENgine) main objective is to provide a simple application container.Orchard Podcasts: The Orchard Podcasting module allows users to create and publish a podcast feed (Yahoo Media RSS) for consumption by users using Orchard v1.6+.Outlook 2013 Backup Add-In: Automatically backups psd-files after closing Outlook. This plugin is compatible with Outlook 2013 32/64 Bit Version. Project Emilie: A little help to make your WinRT XAML projects truly fast and fluid, based on work from two of the top Windows 8 applications.Search WPF: A small utility to browse the WPF classes and interfaces.sGaming: Silverlight 3D EngineTelerik Connect: Simple ASP.NET Project aiming to build a copy of the LinkedIn website functionality.Testing The Unittesting Tools in Visual Studio: This project is a collection of testprograms for verifying the different test adapters available for Visual Studio. TvLinks Torrent Searcher: Easy way to search Torrents for TV Series.xnaGaming: XNA game engine

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• Organising data access for dependency injection

  - by IanAWP

  In our company we have a relatively long history of database backed applications, but have only just begun experimenting with dependency injection. I am looking for advice about how to convert our existing data access pattern into one more suited for dependency injection. Some specific questions: Do you create one access object per table (Given that a table represents an entity collection)? One interface per table? All of these would need the low level Data Access object to be injected, right? What about if there are dozens of tables, wouldn't that make the composition root into a nightmare? Would you instead have a single interface that defines things like GetCustomer(), GetOrder(), etc? If I took the example of EntityFramework, then I would have one Container that exposes an object for each table, but that container doesn't conform to any interface itself, so doesn't seem like it's compatible with DI. What we do now, in case it helps: The way we normally manage data access is through a generic data layer which exposes CRUD/Transaction capabilities and has provider specific subclasses which handle the creation of IDbConnection, IDbCommand, etc. Actual table access uses Table classes that perform the CRUD operations associated with a particular table and accept/return domain objects that the rest of the system deals with. These table classes expose only static methods, and utilise a static DataAccess singleton instantiated from a config file.

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• Meaning of offset in pygame Mask.overlap methods

  - by Alan

  I have a situation in which two rectangles collide, and I have to detect how much did they collide so so I can redraw the objects in a way that they are only touching each others edges. It's a situation in which a moving ball should hit a completely unmovable wall and instantly stop moving. Since the ball sometimes moves multiple pixels per screen refresh, it it possible that it enters the wall with more that half its surface when the collision is detected, in which case i want to shift it position back to the point where it only touches the edges of the wall. Here is the conceptual image it: I decided to implement this with masks, and thought that i could supply the masks of both objects (wall and ball) and get the surface (as a square) of their intersection. However, there is also the offset parameter which i don't understand. Here are the docs for the method: Mask.overlap Returns the point of intersection if the masks overlap with the given offset - or None if it does not overlap. Mask.overlap(othermask, offset) -> x,y The overlap tests uses the following offsets (which may be negative): +----+----------.. |A | yoffset | +-+----------.. +--|B |xoffset | | : :

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• How to fetch only the sprites in the player's range of motion for collision testing? (2D, axis aligned sprites)

  - by Twodordan

  I am working on a 2D sprite game for educational purposes. (In case you want to know, it uses WebGl and Javascript) I've implemented movement using the Euler method (and delta time) to keep things simple. Now I'm trying to tackle collisions. The way I wrote things, my game only has rectangular sprites (axis aligned, never rotated) of various/variable sizes. So I need to figure out what I hit and which side of the target sprite I hit (and I'm probably going to use these intersection tests). The old fashioned method seems to be to use tile based grids, to target only a few tiles at a time, but that sounds silly and impractical for my game. (Splitting the whole level into blocks, having each sprite's bounding box fit multiple blocks I might abide. But if the sprites change size and move around, you have to keep changing which tiles they belong to, every frame, it doesn't sound right.) In Flash you can test collision under one point, but it's not efficient to iterate through all the elements on stage each frame. (hence why people use the tile method). Bottom line is, I'm trying to figure out how to test only the elements within the player's range of motion. (I know how to get the range of motion, I have a good idea of how to write a collisionCheck(playerSprite, targetSprite) function. But how do I know which sprites are currently in the player's vicinity to fetch only them?) Please discuss. Cheers!

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• How to safely backup MySQL using VSS-based backup solutions

  - by Rhyven

  One of my clients is running MySQL on a Windows Server 2008 system. Their regular backups are performed using StorageCraft's ShadowCopy, which uses the VSS service to perform backups of open files. Some investigation indicates that MySQL is not entirely VSS-aware, and that the tables need to be locked prior to the shadow operation, then unlocked afterwards. There is a post at http://forum.storagecraft.com/Community/forums/p/548/2702.aspx which indicates the steps that need to be performed, however the user had some difficulty in performing them and no follow up solution was ever posted. Specifically, they succeeded in writing a batch file to lock the database, however once the batch file returns from MySQL it drops the connection and thus relinquishes the lock. I'm looking for a method that I can send the MySQL command FLUSH TABLES WITH READ LOCK, then perform the backup, then send UNLOCK TABLES when the backup is complete. Alternatively, I can exclude the MySQL data storage folder from backup, and schedule a mysqldump backup into a folder that will then be backed up by VSS. Can I have some recommendations please?

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• SSL certificate: unable to get local issuer certificate

  - by celwell

  I'm running Debian (Lenny). When I run this: curl --ssl https://www.google.com I get this error: curl: (60) SSL certificate problem: unable to get local issuer certificate More details here: http://curl.haxx.se/docs/sslcerts.html curl performs SSL certificate verification by default, using a "bundle" of Certificate Authority (CA) public keys (CA certs). If the default bundle file isn't adequate, you can specify an alternate file using the --cacert option. If this HTTPS server uses a certificate signed by a CA represented in the bundle, the certificate verification probably failed due to a problem with the certificate (it might be expired, or the name might not match the domain name in the URL). If you'd like to turn off curl's verification of the certificate, use the -k (or --insecure) option.

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• RAM caching causes severe performance drops

  - by B T

  I have read plenty of threads on memory caching and the standard response of "large cache is good, it shouldn't effect performance", "the kernel knows best". I have recently upgraded from 12.04 to 12.10 and changed from VirtualBox to VMware Workstation and the performance differences are severe (I suspect it is because of the latter). When I am running my virtual machine the system load monitor graph shows less than 50% memory usage generally. System load indicator is showing me that the rest of my RAM is used in the cache all the time. Plain and simple this is the comparison: BEFORE Cache was very sparingly used, pretty much none of my memory usage was the cache Swappiness was 0 (caused my memory to be used first, then swap only if needed) Performance was quite good and logical RAM was used fully first, caching was minimal. I could run enough software to utilize my full 4GB of RAM without any performance degradation whatsoever Swap space was then used as needed which was obviously slower (I am on a HDD) but was still usable when the current program was loaded into memory AFTER Cache is used to fill the full 4GB as soon as my virtual machine is run Swappiness is 0 (same behaviour as before but cache uses full memory straight away) Performance is terrible and unusable while running Ubuntu software Basic things like changing windows takes 2 minutes + Changing screens happens frame by frame over sometimes up to 5 minutes Cannot run an IDE and VM like I could with ease before So basically, any suggestions on how to take my performance back to how it was before while keeping my current setup? My suspicion is VMWare is the problem, but how do I see what is tied to the use of the cache? Surely there is a way to control this behaviour in software as polished as VMware? Thanks EDIT: Could also be important to note that the behaviour differs depending on whether VMware is open or closed. If VMware is open, then the ram will lock at like 50% and 50% cache and go into the complete lock up mentioned above. Contrastingly, if VMware is closed (after being open), then the RAM will continue to rise as it needs / cache will stay as the complete remaining memory and there is no noticeable performance degradation.

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• How to change a function/formula in a whole column where I also have empty cells

  - by Zvi

  I have a column with a formula/function that has other cells as parameters. However in the column, every few rows I have a subtotal and blanks, for readability. Now I decided to change the formula/function but I can not do copy+paste on the whole column because of the subtotals/blank cells, and I can not do change+replace because there are parameters in the functions that uses other cells and thus it is different in each cell in the column. For example, if the formula is =if(A5>24,1,"") and I want to change it to =AA_userfn(A5,B5) Any idea how to change it easily? currently I copy+paste few rows at a time, but that is tedious. Maybe a Sub that will go all over the column (the column number as an input parameter) and looks for =if(, and then replaces it with =aa_userfn(Ax, By) where Ax and By are calculated based on the position of the cell currently changed in reference to the previous values in that cell. Any ideas will be welcomed

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• Github Project Wiki: separate page filename from page title

  - by Marko Apfel

  Starting Point In a former version of a project wiki on Github was a separation between the page filename and page title. So we build up our Wiki in a manner, that some well defined prefixes in the filename describe the overall context of the particular page. Sample: At the page themselves we used a title-tag on top of the page to get the title in the rendered HTML-page. Here “= Tabelle: Anhänge bzw. Attachments” for the page with filename “data+table+Attachment”. This was rendered as We see: there is a file “data+table+Attachment” and a title-tag “= Tabelle: Anhänge bzw. Attachments” as well as a rendering with the title “Tabelle: Anhänge bzw. Attachments”. This was fine. Problem Now the Github-Wiki uses the title of the page as the filename and vice versa. This ends up in a cluttered file system and also in suppressing titles in the page themselves. So this page renders to As we could see: the title tag “= Organisation: IT-Infrastruktur” is not more rendered. Instead the filename “organisation+IT Infrastructure” is choosen as the title for the page. That sucks. Solution I reported this by Github again and hope for a fix.

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• How can I generate a view or projection matrix for OpenGL 3.+

  - by Ken

  I'm transitioning from OpenGL 2 to OpenGL 3.+ and to GLSL 1.5. I'm trying to avoid using the deprecated features. My question how do we now generate the view or projection matrix. I was using the matrix stack to calculate the projection matrix for me; GLfloat ptr[16]; gluPerspective(...); glGetFloatv(GL_MODELVIEW_MATRIX, ptr); //then pass ptr via a uniform to the shader But obviously the matrix stack is deprecated. So this approach is not the best an option going forward. I have the 'Red Book', 7th ed, which covers 3.0 & 3.1 and it still uses the deprecated matrix functions in it's examples. I could write some utility-code myself to generate the matrices. But I don't want to re-invent this particular wheel, especially when this functionality is required for every 3D graphics program. What is the accepted way to generate world,view & projection matrices for OpenGL? Is there an emerging 'standard' library for this? Or is there some other hidden (to me) functionality in OpenGL/GLSL which I have overlooked?

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• Legal Web Fonts & Licensing

  - by Phill

  So I'm a little confused in regards to legality of using fonts for web. Often from designers I get a PSD file and it uses a special font, and the font is supplied. However attempting to convert the font using: http://www.fontsquirrel.com/fontface/generator Ends up with a message saying it's blocked by Adobe. Not only that sometimes if the font can be converted, it often looks like crap when viewed in a browser. I assume that the generator is primarily for people to convert their own fonts, but if you purchase the use of a font then you can only use it for Web if the terms allows you to? The fonts used in PSD's are often Adobe Fonts, I can't find anything that suggests I can convert those and use them on the web. So I'm wondering if anyone knows the legal rights around using Photoshop supplied fonts on the web? In addition I'm wondering what resources are available (free/paid) that provide fonts that can be used on the web. Free: http://www.fontsquirrel.com http://www.google.com/webfonts Paid: http://www.fontshop.com This is the only one's I've found so far that aren't cartoon type fonts like what's primarily on www.dafont.com

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• Flattening PDF transparency

  - by Jan

  I have a PDF, made with Inkscape, that uses transparent colors. This image shall be used in a LaTeX document. While preserving the transparency is nice for editing, it can be a problem for printing. Printing usually involves PDF to PS conversion. Since Postscript does not support transparency, this requires either flatting, i.e. creating a vector graphic that works without transparency or rastering, i.e. rendering a bitmap image. When a PDF document containing such a figure is printed (or converted to PS) using Evince (or Cairo or Ghostscript), the whole page gets rendered as a bitmap, rendering fonts ugly (different from other pages). (Adobe Acrobat handles such PDFs well.) Unfortunately, converting the PDF figures to EPS (before including them with LaTeX) doesn't help much, because both pdftops and pdf2ps (again, Cairo or Ghostscript) rasterize the image, i.e. render a bitmap (saved as EPS). (This is slightly better, because it doesn't affect the whole page, but I'd still prefer a vector graphics.) How can I flatten transparency with Inkscape or other software on Linux?

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• Marshalling the value of a char* ANSI string DLL API parameter into a C# string

  - by Brian Biales

  For those who do not mix .NET C# code with legacy DLL's that use char* pointers on a regular basis, the process to convert the strings one way or the other is non-obvious. This is not a comprehensive article on the topic at all, but rather an example of something that took me some time to go find, maybe it will save someone else the time. I am utilizing a third party too that uses a call back function to inform my application of its progress.  This callback includes a pointer that under some circumstances is a pointer to an ANSI character string.  I just need to marshal it into a C# string variable.  Seems pretty simple, yes?  Well, it is, (as are most things, once you know how to do them). The parameter of my callback function is of type IntPtr, which implies it is an integer representation of a pointer.  If I know the pointer is pointing to a simple ANSI string, here is a simple static method to copy it to a C# string: private static string GetStringFromCharStar(IntPtr ptr) {     return System.Runtime.InteropServices.Marshal.PtrToStringAnsi(ptr); } The System.Runtime.InteropServices is where to look any time you are mixing legacy unmanaged code with your .NET application.

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• Applications: The mathematics of movement, Part 1

  - by TechTwaddle

  Before you continue reading this post, a suggestion; if you haven’t read “Programming Windows Phone 7 Series” by Charles Petzold, go read it. Now. If you find 150+ pages a little too long, at least go through Chapter 5, Principles of Movement, especially the section “A Brief Review of Vectors”. This post is largely inspired from this chapter. At this point I assume you know what vectors are, how they are represented using the pair (x, y), what a unit vector is, and given a vector how you would normalize the vector to get a unit vector. Our task in this post is simple, a marble is drawn at a point on the screen, the user clicks at a random point on the device, say (destX, destY), and our program makes the marble move towards that point and stop when it is reached. The tricky part of this task is the word “towards”, it adds a direction to our problem. Making a marble bounce around the screen is simple, all you have to do is keep incrementing the X and Y co-ordinates by a certain amount and handle the boundary conditions. Here, however, we need to find out exactly how to increment the X and Y values, so that the marble appears to move towards the point where the user clicked. And this is where vectors can be so helpful. The code I’ll show you here is not ideal, we’ll be working with C# on Windows Mobile 6.x, so there is no built-in vector class that I can use, though I could have written one and done all the math inside the class. I think it is trivial to the actual problem that we are trying to solve and can be done pretty easily once you know what’s going on behind the scenes. In other words, this is an excuse for me being lazy. The first approach, uses the function Atan2() to solve the “towards” part of the problem. Atan2() takes a point (x, y) as input, Atan2(y, x), note that y goes first, and then it returns an angle in radians. What angle you ask. Imagine a line from the origin (0, 0), to the point (x, y). The angle which Atan2 returns is the angle the positive X-axis makes with that line, measured clockwise. The figure below makes it clear, wiki has good details about Atan2(), give it a read. The pair (x, y) also denotes a vector. A vector whose magnitude is the length of that line, which is Sqrt(x*x + y*y), and a direction ?, as measured from positive X axis clockwise. If you’ve read that chapter from Charles Petzold’s book, this much should be clear. Now Sine and Cosine of the angle ? are special. Cosine(?) divides x by the vectors length (adjacent by hypotenuse), thus giving us a unit vector along the X direction. And Sine(?) divides y by the vectors length (opposite by hypotenuse), thus giving us a unit vector along the Y direction. Therefore the vector represented by the pair (cos(?), sin(?)), is the unit vector (or normalization) of the vector (x, y). This unit vector has a length of 1 (remember sin2(?) + cos2(?) = 1 ?), and a direction which is the same as vector (x, y). Now if I multiply this unit vector by some amount, then I will always get a point which is a certain distance away from the origin, but, more importantly, the point will always be on that line. For example, if I multiply the unit vector with the length of the line, I get the point (x, y). Thus, all we have to do to move the marble towards our destination point, is to multiply the unit vector by a certain amount each time and draw the marble, and the marble will magically move towards the click point. Now time for some code. The application, uses a timer based frame draw method to draw the marble on the screen. The timer is disabled initially and whenever the user clicks on the screen, the timer is enabled. The callback function for the timer follows the standard Update and Draw cycle. private double totLenToTravelSqrd = 0; private double startPosX = 0, startPosY = 0; private double destX = 0, destY = 0; private void Form1_MouseUp(object sender, MouseEventArgs e) {     destX = e.X;     destY = e.Y;     double x = marble1.x - destX;     double y = marble1.y - destY;     //calculate the total length to be travelled     totLenToTravelSqrd = x * x + y * y;     //store the start position of the marble     startPosX = marble1.x;     startPosY = marble1.y;     timer1.Enabled = true; } private void timer1_Tick(object sender, EventArgs e) {     UpdatePosition();     DrawMarble(); } Form1_MouseUp() method is called when ever the user touches and releases the screen. In this function we save the click point in destX and destY, this is the destination point for the marble and we also enable the timer. We store a few more values which we will use in the UpdatePosition() method to detect when the marble has reached the destination and stop the timer. So we store the start position of the marble and the square of the total length to be travelled. I’ll leave out the term ‘sqrd’ when speaking of lengths from now on. The time out interval of the timer is set to 40ms, thus giving us a frame rate of about ~25fps. In the timer callback, we update the marble position and draw the marble. We know what DrawMarble() does, so here, we’ll only look at how UpdatePosition() is implemented; private void UpdatePosition() {     //the vector (x, y)     double x = destX - marble1.x;     double y = destY - marble1.y;     double incrX=0, incrY=0;     double distanceSqrd=0;     double speed = 6;     //distance between destination and current position, before updating marble position     distanceSqrd = x * x + y * y;     double angle = Math.Atan2(y, x);     //Cos and Sin give us the unit vector, 6 is the value we use to magnify the unit vector along the same direction     incrX = speed * Math.Cos(angle);     incrY = speed * Math.Sin(angle);     marble1.x += incrX;     marble1.y += incrY;     //check for bounds     if ((int)marble1.x < MinX + marbleWidth / 2)     {         marble1.x = MinX + marbleWidth / 2;     }     else if ((int)marble1.x > (MaxX - marbleWidth / 2))     {         marble1.x = MaxX - marbleWidth / 2;     }     if ((int)marble1.y < MinY + marbleHeight / 2)     {         marble1.y = MinY + marbleHeight / 2;     }     else if ((int)marble1.y > (MaxY - marbleHeight / 2))     {         marble1.y = MaxY - marbleHeight / 2;     }     //distance between destination and current point, after updating marble position     x = destX - marble1.x;     y = destY - marble1.y;     double newDistanceSqrd = x * x + y * y;     //length from start point to current marble position     x = startPosX - (marble1.x);     y = startPosY - (marble1.y);     double lenTraveledSqrd = x * x + y * y;     //check for end conditions     if ((int)lenTraveledSqrd >= (int)totLenToTravelSqrd)     {         System.Console.WriteLine("Stopping because destination reached");         timer1.Enabled = false;     }     else if (Math.Abs((int)distanceSqrd - (int)newDistanceSqrd) < 4)     {         System.Console.WriteLine("Stopping because no change in Old and New position");         timer1.Enabled = false;     } } Ok, so in this function, first we subtract the current marble position from the destination point to give us a vector. The first three lines of the function construct this vector (x, y). The vector (x, y) has the same length as the line from (marble1.x, marble1.y) to (destX, destY) and is in the direction pointing from (marble1.x, marble1.y) to (destX, destY). Note that marble1.x and marble1.y denote the center point of the marble. Then we use Atan2() to get the angle which this vector makes with the positive X axis and use Cosine() and Sine() of that angle to get the unit vector along that same direction. We multiply this unit vector with 6, to get the values which the position of the marble should be incremented by. This variable, speed, can be experimented with and determines how fast the marble moves towards the destination. After this, we check for bounds to make sure that the marble stays within the screen limits and finally we check for the end condition and stop the timer. The end condition has two parts to it. The first case is the normal case, where the user clicks well inside the screen. Here, we stop when the total length travelled by the marble is greater than or equal to the total length to be travelled. Simple enough. The second case is when the user clicks on the very corners of the screen. Like I said before, the values marble1.x and marble1.y denote the center point of the marble. When the user clicks on the corner, the marble moves towards the point, and after some time tries to go outside of the screen, this is when the bounds checking comes into play and corrects the marble position so that the marble stays inside the screen. In this case the marble will never travel a distance of totLenToTravelSqrd, because of the correction is its position. So here we detect the end condition when there is not much change in marbles position. I use the value 4 in the second condition above. After experimenting with a few values, 4 seemed to work okay. There is a small thing missing in the code above. In the normal case, case 1, when the update method runs for the last time, marble position over shoots the destination point. This happens because the position is incremented in steps (which are not small enough), so in this case too, we should have corrected the marble position, so that the center point of the marble sits exactly on top of the destination point. I’ll add this later and update the post. This has been a pretty long post already, so I’ll leave you with a video of how this program looks while running. Notice in the video that the marble moves like a bot, without any grace what so ever. And that is because the speed of the marble is fixed at 6. In the next post we will see how to make the marble move a little more elegantly. And also, if Atan2(), Sine() and Cosine() are a little too much to digest, we’ll see how to achieve the same effect without using them, in the next to next post maybe. Ciao!

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• HTML Maps for DataViz

  - by jamiet

  I don’t talk about data visualisation (#dataviz) much on this blog because, well, because its not something I can claim to be particularly knowledgeable about – that doesn’t stop me from having an opinion about it though. I just stumbled upon an article that compares the media ecosystems of four various technology companies entitled Mapping The Entertainment Ecosystems of Apple, Microsoft, Google & Amazon and apart from being a well-researched and well-written article (not something that the tech press excels in, in my opinion) I was struck by how well the author uses maps to tell a story to the reader. Take the map in this screenshot: Clicking on one of the four icons at the bottom of the map dynamically changes the shaded areas of the map to indicate which countries that company offers their services. Its aesthetically pleasing but moreover it instantly coveys useful information to me. What I love about it most of all though is that its all pure HTML – I don’t need any poxy Silverlight or Flash plugin to view the maps and interact with them – all I need is an up to date web browser (I use Chrome v22 although I tested using IE9 and it worked fine there too). This is how I believe data visualisation should be - conveying useful info in a friction-free way. Maps are a great way of achieving that – I just wish more people agreed with me about calendars as a mechanism for doing the same! @Jamiet

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• Presenting the Cloud in a Different Way

  - by BuckWoody

  I had the honor of presenting the Developers at the Portland PASS chapter, and decided to go a different way than just using PowerPoint Slides…. (click on any picture to enlarge) The point is that when you need to get a point across, it’s OK to change tactics to make sure the information sticks. In this case, I decided to make the audience the PowerPoint. I used a few props to show the various paradigms we use to describe what the industry uses for the word “cloud” First, we talked about Infrastructure as a Service. I picked a gentleman who didn’t quite fit the hard hat and safety vest I picked out for him. Notice our “user” as she accesses our “Server” (complete with tray and glass) which has been virtualized.    Software as a service comes next. In this case, the user and potentially even customers just access software (represented here as a Windows ME box…) remotely – everything is virtualized. Finally, Platform as a Service – Yup, Platform shoes as a necklace, and a tie-dye shirt to represent the 70’s – a decade when mainframes used stateless programming as well. Notice also the components of Windows Azure – Compute (Keyboard) Application Fabric (Toy Bus) and Storage (Bucket).   And at the end of the day, it’s all about serving those customers…

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• Wake timers don't wake computer from sleep mode

  - by Joe

  I'm got a custom built PC running 64 bit Windows 7 Ultimate. So far everything works great except for one thing: it will not wake up from sleep mode for a wake timer or scheduled task. Sleep mode itself works great. If it's sleeping, it wakes successfully when I press the power button, mash the keyboard, wiggle the mouse, or send a WOL packet. The only problem is wake timers. I even tried the program WakeupOnStandBy but it looks like that uses wake timers, so it doesn't do anything for me either. And yes, wake timers are enabled: Any ideas on how to fix the problem, or troubleshoot it? I'd imagine that there would be a log somewhere telling me exactly why the wake timers are having trouble, but if there is I haven't found it.

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• FrameworkFolders support for WebCenter Portal

  - by Justin Paul-Oracle

  Oracle WebCenter Content Server includes components that provide a hierarchical folder interface, similar to a conventional file system, for organizing and managing some or all of the content in the repository. We used Contribution Folders (folders_g) which is being replaced by the new Folders (FrameworkFolders) component. The newer FrameworkFolders component fixes a number of limitations that folders_g had and adds a ton of new features. If you have played with the WebCenter Content mobile app, you will notice that it uses FrameworkFolders too. WebCenter Portal requires the use of the folders_g component. Given the fact that folders_g and FrameworkFolders component do not go well together and must never be enabled together on any system, you could never use the new features if you planned to use integrate Content with Portal. I still remember presenting a demo with a colleague for a client and he was showing off the mobile capabilities in Portal (which are pretty impressive by the way) and was getting all the glory; while I was sitting back wanting to show off the Content app but could not (no FrameworkFolders). Not any more; Oracle has released bundle patches for both WebCenter Content and Portal in April 2014 which bring home the support for FrameworkFolders. These patches will bring these products to version 11.1.1.8.3. You can enable support for FrameworkFolders on new Content and Portal installations where the folders_g component has never been enabled using the following patches: Download and apply the WebCenter Content MLR03 patch 18088049. Download and apply the WebCenter Portal BP3 patch 18085041. Download and apply the WebCenterConfigure component patch 18387955. Before applying this patch on the Content Server ensure that WebCenter Content MLR03 patch 18088049 has already been applied. You can find detailed instructions on how to enable FrameworkFolders support in the Oracle® Fusion Middleware Installation Guide for Oracle WebCenter Portal 11g Release 1 (11.1.1.8.3). There may be another bundle patches release (version 11.1.1.8.4) for many FMW products (including WebCenter Portal) in July 2014 which could further enhance the FrameworkFolders support.

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• ASP.NET: Serializing and deserializing JSON objects

  - by DigiMortal

  ASP.NET offers very easy way to serialize objects to JSON format. Also it is easy to deserialize JSON objects using same library. In this posting I will show you how to serialize and deserialize JSON objects in ASP.NET. All required classes are located in System.Servicemodel.Web assembly. There is namespace called System.Runtime.Serialization.Json for JSON serializer. To serialize object to stream we can use the following code. var serializer = new DataContractJsonSerializer(typeof(MyClass)); serializer.WriteObject(myStream, myObject); To deserialize object from stream we can use the following code. CopyStream() is practically same as my Stream.CopyTo() extension method. var serializer = new DataContractJsonSerializer(typeof(MyClass));   using(var stream = response.GetResponseStream()) using (var ms = new MemoryStream()) {     CopyStream(stream, ms);     results = serializer.ReadObject(ms) as MyClass; } Why I copied data from response stream to memory stream? Point is simple – serializer uses some stream features that are not supported by response stream. Using memory stream we can deserialize object that came from web.

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• Redirect output of Python program to /dev/null

  - by STM

  I have a Python executable, written and compiled by somebody else, that I simply need to run once halfway down my own bash script. The program uses a text-based UI, therefore waits for input before proceeding, but the key operations it performs when starting are required in my bash script. A messy (and strange) procedure I know, but unfortunately I haven't got any other options. I've gotten around forcefully closing the program with a kill signal, but the program's TUI insists on outputting to wherever it's run. I've tried redirecting both stdout and stderr to /dev/null and running the program in the background by suffixing an ampersand, but simply can't get it to play ball. I believe the cause is the program spawns other processes, and the output redirection of the parent process doesn't affect them. Is there any trick I can utilise to redirect all output from child processes too?

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• Can not search my company howto blog site anylonger in Sharepoint

  - by Worldunix

  I have a Howto company Blog site that i post to for my clients to access for help. For some reason it has stopped letting anyone search on it. I can search for Mysites or users. But when you drop down the tab to search: This Site: "blog site name" you get the following reply: No results matching your search were found. Check your spelling. Are the words in your query spelled correctly? Try using synonyms. Maybe what you're looking for uses slightly different words. Make your search more general. Try more general terms in place of specific ones. Try your search in a different scope. Different scopes can have different results. I have tried the following command: from the Index server net stop osearch net start osearch iisreset /noforce But still not able to search a local blog site I can only search for users and Sites. please help Don

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• Can not search my company howto blog site anylonger in Sharepoint

  - by Worldunix

  I have a Howto company Blog site that i post to for my clients to access for help. For some reason it has stopped letting anyone search on it. I can search for Mysites or users. But when you drop down the tab to search: This Site: "blog site name" you get the following reply: No results matching your search were found. Check your spelling. Are the words in your query spelled correctly? Try using synonyms. Maybe what you're looking for uses slightly different words. Make your search more general. Try more general terms in place of specific ones. Try your search in a different scope. Different scopes can have different results. I have tried the following command: from the Index server net stop osearch net start osearch iisreset /noforce But still not able to search a local blog site I can only search for users and Sites. please help Don

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• Chrome - SSL Security issue on Windows platforms?

  - by al nik

  Fortify.net is a service that displays what's the currently encryption key used by your browser in a https connection. If I browse this site with Chrome 4.1.249.1042 in WinXp SP3 the key used is RC4 cipher, 128-bit key This encryption is weak, and it's the one used by old browsers like IE6. Chrome works fine on Fedora9 and it uses AES cipher, 256-bit key as more modern browsers do (i.e.Firefox) I consider this a security issue. I'm considering to switch back to Firefox in Windows. Do you know if it's possible to change the default encryption key in Chrome?

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• Exchange 2007: relay only from selected servers based on rDNS

  - by Frank

  I'm looking for a way to make Exchange 2007 only accept mail from a certain group of hosts. These hosts all use the same identifying rDNS entry. Exchange 2003 uses a whitelist based on the reverse DNS, there we could add the hostname to the to the "Domain" field. However, in Exchange 2007 this option seems to be removed. Is there a way to do this? IP's however tend to change. These changes can occur at any time, and it is impossible to keep all the servers up-to-date to the new IP's. Running a script that resolves the hostname and whitelists them accordingly is my last-resort option, but this is not fool-proof. Does anyone know whether this is possible and if so, how? Thanks!

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• Mobile Phone Browser Emulators/Simulators

  - by Jessie

  I work in QA in a .NET shop and recently part of my testing process has started to involve testing our company website on mobile devices. At least one of our techs uses an HTC Desire. After tons of googling I still can't find a good online emulator for testing websites on different types of mobile devices. Is anyone aware of a website that I can test across multiple mobile platforms? Or even an online HTC or Blackberry browser emulator? I've found an iphone/opera mini simulator, but that's about it. Also, I realize there are a lot of SDK's that include emulators, but I'd rather not have to set up an entire SDK just to use an emulator.

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