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• Speaking at Microsoft's Duth DevDays

  - by gsusx

  Last week I had the pleasure of presenting two sessions at Microsoft's Dutch DevDays at Den Hague. On Tuesday I presented a sessions about how to implement real world RESTFul services patterns using WCF, WCF Data Services and ASP.NET MVC2. During that session I showed a total of 15 small demos that highlighted how to implement key aspects of RESTful solutions such as Security, LowREST clients, URI modeling, Validation, Error Handling, etc. As part of those demos I used the OAuth implementation created...(read more)

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• Is Learning C++ Through The Qt Framework Really Learning C++

  - by user866190

  The problem I have, is that most of the C++ books I read spend almost forever on syntax and the basics of the language, e.g. for and loops while, arrays, lists, pointers, etc. But they never seem to build anything that is simple enough to use for learning, yet practical enough to get you to understand the philosophy and power of the language. Then I stumbled upon QT which is an amazing library! But working through the demos they have, it seems like I am now in the reverse dilemma. I feel like the rich man's son driving round in a sports car subsidized by the father. Like I could build fantastic software, but have no clue what's going on under the hood. As an example of my dilemma take the task of building a simple web browser. In pure C++, I wouldn't even know where to start, yet with the Qt library it can be done within a few lines on code. I am not complaining about this. I am just wondering how to fill the knowledge void between the basic structure of the language and the high level interface that the Qt framework provides?

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• Identifier for the “completed” stage of a process: 0, 99, something else?

  - by Arnold Sakhnov

  Say, that you are handling a multi-step process (like a complex registration form, with a number of steps the user has go through in order). You need to be able to save the current state of the process (e.g. so the user can come back to that registration form later and continue form the step where they were left off). Obviously, you’ll probably want to give each “step” an identifier you can refer to: 1, 2, 3, 4, etc. You logic will check for this step_id (or whatever you call it) to render the appropriate data. The question: how would you identify the stage after the final step, like the completed registration state (say, that you have to give that last “step” its own id, that’s how your logic is structured). Would it be a 0, 999, a non-integer value, something else entirely?

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• Approximating walking physics via simpler sliding physics

  - by Dave

  I am modeling walking insects. I implement them as cuboids and use forces (including friction and drag), to control motion. However, the movement characteristics of this 'sliding box' physics don't match those due to a legged creature. For example, legged creatures near-instantly accelerate to their top speed; whereas applying a force to a box takes time to accelerate it. The applied force can be increased along with the counteracting drag, giving much quicker acceleration (via force) to a max speed (via drag). However, this also means the force that creatures can exert when pushing on other objects is increased. Does anyone know of any techniques using a physics engine to cheaply model walking creatures?

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• Error Handling Examples(C#)

  “The purpose of reviewing the Error Handling code is to assure that the application fails safely under all possible error conditions, expected and unexpected. No sensitive information is presented to the user when an error occurs.” (OWASP, 2011) No Error Handling The absence of error handling is still a form of error handling. Based on the code in Figure 1, if an error occurred and was not handled within either the ReadXml or BuildRequest methods the error would bubble up to the Search method. Since this method does not handle any acceptations the error will then bubble up the stack trace. If this continues and the error is not handled within the application then the environment in which the application is running will notify the user running the application that an error occurred based on what type of application. Figure 1: No Error Handling public DataSet Search(string searchTerm, int resultCount) { DataSet dt = new DataSet(); dt.ReadXml(BuildRequest(searchTerm, resultCount)); return dt; } Generic Error Handling One simple way to add error handling is to catch all errors by default. If you examine the code in Figure 2, you will see a try-catch block. On April 6th 2010 Louis Lazaris clearly describes a Try Catch statement by defining both the Try and Catch aspects of the statement. “The try portion is where you would put any code that might throw an error. In other words, all significant code should go in the try section. The catch section will also hold code, but that section is not vital to the running of the application. So, if you removed the try-catch statement altogether, the section of code inside the try part would still be the same, but all the code inside the catch would be removed.” (Lazaris, 2010) He also states that all errors that occur in the try section cause it to stops the execution of the try section and redirects all execution to the catch section. The catch section receives an object containing information about the error that occurred so that they system can gracefully handle the error properly. When errors occur they commonly log them in some form. This form could be an email, database entry, web service call, log file, or just an error massage displayed to the user.  Depending on the error sometimes applications can recover, while others force an application to close. Figure 2: Generic Error Handling public DataSet Search(string searchTerm, int resultCount) { DataSet dt = new DataSet(); try { dt.ReadXml(BuildRequest(searchTerm, resultCount)); } catch (Exception ex) { // Handle all Exceptions } return dt; } Error Specific Error Handling Like the Generic Error Handling, Error Specific error handling allows for the catching of specific known errors that may occur. For example wrapping a try catch statement around a soap web service call would allow the application to handle any error that was generated by the soap web service. Now, if the systems wanted to send a message to the web service provider every time a soap error occurred but did not want to notify them if any other type of error occurred like a network time out issue. This would be varying tedious to accomplish using the General Error Handling methodology. This brings us to the use case for using the Error Specific error handling methodology.  The Error Specific Error handling methodology allows for the TryCatch statement to catch various types of errors depending on the type of error that occurred. In Figure 3, the code attempts to handle DataException differently compared to how it potentially handles all other errors. This allows for specific error handling for each type of known error, and still allows for error handling of any unknown error that my occur during the execution of the TryCatch statement. Figure 5: Error Specific Error Handling public DataSet Search(string searchTerm, int resultCount) { DataSet dt = new DataSet(); try { dt.ReadXml(BuildRequest(searchTerm, resultCount)); } catch (TimeoutException ex) { // Handle Timeout TimeoutException Only } catch (Exception) { // Handle all Exceptions } return dt; }

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• Coding standards

  - by Piotr Rodak

  This post will be about coding standards. There are countless articles and blog posts related to this topic, so I know this post will not be too revealing. Yet I would like to mention a few things I came across during my work with the T-SQL code. Naming convention - there are many of them obviously. Too bad if all of them are used in the same database, and sometimes even in the same stored procedure. It is not uncommon to see something like create procedure dbo . Proc1 ( @ParamId int ) as begin declare...(read more)

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• Python productivity VS Java Productivity

  - by toc777

  Over on SO I came across a question regarding which platform, Java or Python is best for developing on Google AppEngine. Many people were boasting of the increased productivity gained from using Python over Java. One thing I would say about the Python vs Java productivity argument, is Java has excellent IDE's to speed up development where as Python is really lacking in this area because of its dynamic nature. So even though I prefer to use Python as a language, I don't believe it gives quite the productivity boost compared to Java especially when using a new framework. Obviously if it were Java vs Python and the only editor you could use was VIM then Python would give you a huge productivity boost but when IDE's are brought into the equation its not as clear cut. I think Java's merits are often solely evaluated on a language level and often on out dated assumptions but Java has many benefits external to the language itself, e.g the JVM (often criticized but offers huge potential), excellent IDE's and tools, huge numbers of third party libraries, platforms etc.. Question, Does Python/related dynamic languages really give the huge productivity boosts often talked about? (with consideration given to using new frameworks and working with medium to large applications).

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• DonXml does WCF in NYC

  - by gsusx

  Tomorrow is WCF day in New York city!!!!! My good friend and Tellago's CTO Don Demsak will be doing a session WCF Data and RIA Services at the WCF fire-starter event to be hosted at the Microsoft offices in New York city. Don has a encyclopedic knowledge of both technologies and will be sharing lots of best practices learned from applying these technologies in large service oriented environments. In addition to Don, my crazy Cuban friend Miguel Castro will also be presenting three sessions at the...(read more)

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• The hidden cost of interrupting knowledge workers

  - by Piet

  The November issue of pragpub has an interesting article on interruptions. The article is written by Brian Tarbox, who also mentions the article on his blog. I like the subtitle: ‘Simple Strategies for Avoiding Dumping Your Mental Stack’. Brian talks about the effective cost of interrupting a ‘knowledge worker’, often with trivial questions or distractions. In the eyes of the interruptor, the interruption only costs the time the interrupted had to listen to the question and give an answer. However, depending on what the interrupted was doing at the time, getting fully immersed in their task again might take up to 15-20 minutes. Enough interruptions might even cause a knowledge worker to mentally call it a day. According to this article interruptions can consume about 28% of a knowledge worker’s time, translating in a $588 billion loss for US companies each year. Looking for a new developer to join your team? Ever thought about optimizing your team’s environment and the way they work instead? Making non knowledge workers aware You can’t. Well, I haven’t succeeded yet. And believe me: I’ve tried. When you’ve got a simple way to really increase your productivity (’give me 2 hours of uninterrupted time a day’) it wouldn’t be right not to tell your boss or team-leader about it. The problem is: only productive knowledge workers seem to understand this. People who don’t fall into this category just seem to think you’re joking, being arrogant or anti-social when you tell them the interruptions can really have an impact on your productivity. Also, knowledge workers often work in a very concentrated mental state which is described here as: It is the same mindfulness as ecstatic lovemaking, the merging of two into a fluidly harmonious one. The hallmark of flow is a feeling of spontaneous joy, even rapture, while performing a task. Yes, coding can be addictive and if you’re interrupting a programmer at the wrong moment, you’re effectively bringing down a junkie from his high in just a few seconds. This can result in seemingly arrogant, almost aggressive reactions. How to make people aware of the production-cost they’re inflicting: I’ve been often pondering that question myself. The article suggests that solutions based on that question never seem to work. To be honest: I’ve never even been able to find a half decent solution for this question. People who are not in this situations just don’t understand the issue, no matter how you try to explain it. Fun (?) thing I’ve noticed: Programmers or IT people in general who don’t get this are often the kind of people who just don’t get anything done. Interrupt handling (interruption management?) IRL Have non-urgent questions handled in a non-interruptive way It helps a bit to educate people into using non-interruptive ways to ask questions: “duh, I have no idea, but I’m a bit busy here now could you put it in an email so I don’t forget?”. Eventually, a considerable amount of people will skip interrupting you and just send an email right away. Some stubborn-headed people however will continue to just interrupt you, saying “you’re 10 meters from my desk, why can’t we just talk?”. Just remember to disable your email notifications, it can be hard to resist opening your email client when you know a new email just arrived. Use Do Not Disturb signals When working in a group of programmers, often the unofficial sign you can only be interrupted for something important is to put on headphones. And when the environment is quiet enough, often people aren’t even listening to music. Otherwise music can help to block the indirect distractions (someone else talking on the phone or tapping their feet). You might get a “they’re all just surfing and listening to music”-reaction from outsiders though. Peopleware talks about a team where the no-interruption sign was placing a shawl on the desk. If I remember correctly, I am unable to locate my copy of this really excellent must-read book. If you have all standardized on the same IM tool, maybe that tool has a ‘do not disturb’ setting. Also some phone-systems have a ‘DND’ (do not disturb) setting. Hide Brian offers a number of good suggestions, some obvious like: hide away somewhere they can’t find you. Not sure how long it’ll be till someone thinks you’re just taking a nap somewhere though. Also, this often isn’t possible or your boss might not understand this. And if you really get caught taking a nap, make sure to explain that your were powernapping. Counter-act interruptions Another suggestion he offers is when you’re being interrupted to just hold up your hand, blocking the interruption, and at least giving you time to finish your sentence or your block/line of code. The last suggestion works more as a way to make it obvious to the interruptor that they really are interrupting your work and to offload some of the cost on the interruptor. In practice, this can also helps you cool down a bit so you don’t start saying nasty things to the interruptor. Unfortunately I’ve sometimes been confronted with people who just ignore this signal and keep talking, as if they’re sure that whatever they’ve got to say is really worth listening to and without a doubt more important than anything you might be doing. This behaviour usually leaves me speechless (not good when someone just asked a question). I’ve noticed that these people are usually also the first to complain when being interrupted themselves. They’re generally not very liked as colleagues, so try not to imitate their behaviour. TDD as a way to minimize recovery time I don’t like Test Driven Development. Mainly for only one reason: It interrupts flow. At least, that’s what it does for me, but maybe I’m just not grown used to TDD yet. BUT a positive effect TDD has on me when I have to work in an interruptive environment and can’t really get into the ‘flow’ (also supposedly called ‘the zone’ by software developers, although I’ve never heard it 1st hand), TDD helps me to concentrate on the tasks at hand and helps me to get back at work after an interruption. I feel when using TDD, I can get by without the need for being totally ‘in’ the project and I can be reasonably productive without obtaining ‘flow’. Do you have a suggestion on how to make people aware of the concept of ‘flow’ and the cost of interruptions? (without looking like an arrogant ass or a weirdo)

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• How to apply programatical changes to the Terrain SplatPrototype

  - by Shivan Dragon

  I have a script to which I add a Terrain object (I drag and drop the terrain in the public Terrain field). The Terrain is already setup in Unity to have 2 PaintTextures: 1 is a Square (set up with a tile size so that it forms a checkered pattern) and the 2nd one is a grass image: Also the Target Strength of the first PaintTexture is lowered so that the checkered pattern also reveals some of the grass underneath. Now I want, at run time, to change the Tile Size of the first PaintTexture, i.e. have more or less checkers depending on various run time conditions. I've looked through Unity's documentation and I've seen you have the Terrain.terrainData.SplatPrototype array which allows you to change this. Also there's a RefreshPrototypes() method on the terrainData object and a Flush() method on the Terrain object. So I made a script like this: public class AStarTerrain : MonoBehaviour { public int aStarCellColumns, aStarCellRows; public GameObject aStarCellHighlightPrefab; public GameObject aStarPathMarkerPrefab; public GameObject utilityRobotPrefab; public Terrain aStarTerrain; void Start () { //I've also tried NOT drag and dropping the Terrain on the public field //and instead just using the commented line below, but I get the same results //aStarTerrain = this.GetComponents<Terrain>()[0]; Debug.Log ("Got terrain "+aStarTerrain.name); SplatPrototype[] splatPrototypes = aStarTerrain.terrainData.splatPrototypes; Debug.Log("Terrain has "+splatPrototypes.Length+" splat prototypes"); SplatPrototype aStarCellSplat = splatPrototypes[0]; Debug.Log("Re-tyling splat prototype "+aStarCellSplat.texture.name); aStarCellSplat.tileSize = new Vector2(2000,2000); Debug.Log("Tyling is now "+aStarCellSplat.tileSize.x+"/"+aStarCellSplat.tileSize.y); aStarTerrain.terrainData.RefreshPrototypes(); aStarTerrain.Flush(); } //... Problem is, nothing gets changed, the checker map is not re-tiled. The console outputs correctly tell me that I've got the Terrain object with the right name, that it has the right number of splat prototypes and that I'm modifying the tileSize on the SplatPrototype object corresponding to the right texture. It also tells me the value has changed. But nothing gets updated in the actual graphical view. So please, what am I missing?

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• What are the best ways to cope with «one of those days»? [closed]

  - by Júlio Santos

  I work in a fast-paced startup and am absolutely in love with what I do. Still, I wake up to a bad mood as often as the next guy. I find that forcing myself to play out my day as usual doesn't help — in fact, it only makes it worse, possibly ruining my productivity for the rest of the week. There are several ways I can cope with this, for instance: dropping the current task for the day and getting that awesome but low-priority feature in place; doing some pending research for future development (i.e. digging up ruby gems); spending the day reading and educating myself; just taking the day off. The first three items are productive in themselves, and taking the day off recharges my coding mana for the rest of the week. Being a young developer, I'm pretty sure there's a multitude of alternatives that I haven't come across yet. How can programmers cope with off days? Edit: I am looking for answers related specifically to this profession. I therefore believe that coping with off days in our field is fundamentally different that doing so in other areas. Programmers (especially in a start-up) are a unique breed in this context in the sense that they tend to have a multitude of tasks at hand on any given moment, so they can easily switch between these without wreaking too much havoc. Programmers also tend to work based on clear, concise objectives — provided they are well managed either by themselves or a third party — and hence have a great deal of flexibility when it comes to managing their time. Finally, our line of work creates the opportunity — necessity, if you will — to fit a plethora of tasks not directly related to the current one, such as research and staying on top of new releases and software updates.

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• What features would you like to have in PHP?

  - by StasM

  Since it's the holiday season now and everybody's making wishes, I wonder - which language features you would wish PHP would have added? I am interested in some practical suggestions/wishes for the language. By practical I mean: Something that can be practically done (not: "I wish PHP would guess what my code means and fix bugs for me" or "I wish any code would execute under 5ms") Something that doesn't require changing PHP into another language (not: "I wish they'd drop $ signs and use space instead of braces" or "I wish PHP were compiled, statically typed and had # in it's name") Something that would not require breaking all the existing code (not: "Let's rename 500 functions and change parameter order for them") Something that does change the language or some interesting aspect of it (not: "I wish there was extension to support for XYZ protocol" or "I wish bug #12345 were finally fixed") Something that is more than a rant (not: "I wish PHP wouldn't suck so badly") Anybody has any good wishes? Mod edit: Stanislav Malyshev is a core PHP developer.

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• How could you parallelise a 2D boids simulation

  - by Sycren

  How could you program a 2D boids simulation in such a way that it could use processing power from different sources (clusters, gpu). In the above example, the non-coloured particles move around until they cluster (yellow) and stop moving. The problem is that all the entities could potentially interact with each other although an entity in the top left is unlikely to interact with one in the bottom right. If the domain was split into different segments, it may speed the whole thing up, But if an entity wanted to cross into another segment there may be problems. At the moment this simulation works with 5000 entities with a good frame rate, I would like to try this with millions if possible. Would it be possible to use quad trees to further optimise this? Any other suggestions?

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• Mercurial Conversion from Team Foundation Server

  - by mhawley

  I’m using Twitter. Follow me @matthawley One of my many (almost) daily tasks when working on the CodePlex platform since releasing Mercurial as a supported version control system, is converting projects from Team Foundation Server (TFS) to Mercurial. I'm happy to say that of all the conversions I have done since mid-January, the success rate of migrating full source history is about 95%. To get to this success point, I have had to learn and refine several techniques utilizing a few different tools… (read more)

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• Good fix vs Quick fix [duplicate]

  - by Andrea Girardi

  This question already has an answer here: Does craftsmanship pay off? [duplicate] 16 answers Good design: How much hackyness is acceptable? [duplicate] 9 answers How do you balance between “do it right” and “do it ASAP” in your daily work? 14 answers Let's start from this principle: quality is a feature that you can't add to a project in the middle of the development process. This is the scenario: two weeks to go live with my project and, one of the developers added a specific method used only for one web application to our framework (Our framework is a bounce of java classes used to extract content from MongoDB, Alfresco, mySql and it's used by web applications). I'm the team leader and I told him to generalize the method to keep the framework to keep reusable but he said "no, I prefer don't do that because there are a lot of bugs that need to be fixed". The manager is agree with him and of course I'm not. Is it better to made extra effort to keep a framework free from any specific implementation (probably used only by one web application) or just add the methods because it works? So, my question is: is it correct to write code that only works or is better to write code that works but it doesn't sucks (i.e. adding embedded value, specific methods, extra classes, add column to database, etc)? How is it possible to justify the extra time (to be honest, this kind of fix requires 10 minutes extra to write a good generic code) to the management? How is possible to argue it's the right way to write code to young developers and PM? in general, good fix or quick fix? Ah, 10 minutes after I get the email from PM, he asked me why on a url of application 2 there was the name of application 1 during the login? I like to quote Jeff Atwood: "Don't leave "broken windows" (bad designs, wrong decisions, or poor code) unrepaired. Fix each one as soon as it is discovered. " Excerpt From: Hyperink. "How-To-Stop-Sucking-And-Be-Awesome-Instead." iBooks.

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• A project idea for project ideas!?

  - by Auxiliary

  First take a look at this question which I asked a few months ago. I still can't find a place where programmers and computer specialists can discuss their projects and ideas. I found OpenHatch.com. It's good but not sufficient, it's only for open-source projects and is not really a place to discuss ideas. OK, so here's an idea, Why don't we make one? The question is do you think there is a need for such a social programmer's lounge? A place where they can discuss their ideas? Do you think it's worth the time and money to start such a website? Do you think it has the potential of getting enough traffic to keep it alive? Many thanks

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• How to train yourself to avoid writing “clever” code?

  - by Dan Abramov

  Do you know that feeling when you just need to show off that new trick with Expressions or generalize three different procedures? This does not have to be on Architecture Astronaut scale and in fact may be helpful but I can't help but notice someone else would implement the same class or package in a more clear, straightforward (and sometimes boring) manner. I noticed I often design programs by oversolving the problem, sometimes deliberately and sometimes out of boredom. In either case, I usually honestly believe my solution is crystal clear and elegant, until I see evidence to the contrary but it's usually too late. There is also a part of me that prefers undocumented assumptions to code duplication, and cleverness to simplicity. What can I do to resist the urge to write “cleverish” code and when should the bell ring that I am Doing It Wrong? The problem is getting even more pushing as I'm now working with a team of experienced developers, and sometimes my attempts at writing smart code seem foolish even to myself after time dispels the illusion of elegance.

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• How common are "bandage" fixes?

  - by gablin

  Imagine the following scenario: You've detected that your (or someone else's) program has a bug - a function produces the wrong result when given a particular input. You examine the code and can't find anything wrong: it just seem to bog out when given this input. You can now do one of two things: you either examine the code further until you've found the actual cause; or you slap on a bandage by adding an if statement checking if the input is this particular input - if it is, return the expected value. To me, applying the bandage would be completely unacceptable. If the code is behaving unexpectingly on this input, what other input that you've missed will it react strangely to? It just doesn't seem like a fix at all - you're just shoveling the problem under the rug. As I wouldn't even consider doing this, I'm surprised at how often the professors and books keep reminding us about how applying "bandage" fixes is not a good idea. So this makes me wonder: just how common are these kinds of "fixes"?

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• How would i down-sample a .wav file then reconstruct it using nyquist? - in matlab [closed]

  - by martin

  This is all done in MatLab 2010 My objective is to show the results of: undersampling, nyquist rate/ oversampling First i need to downsample the .wav file to get an incomplete/ or impartial data stream that i can then reconstuct. Heres the flow chart of what im going to be doing So the flow is analog signal - sampling analog filter - ADC - resample down - resample up - DAC - reconstruction analog filter what needs to be achieved: F= Frequency F(Hz=1/s) E.x. 100Hz = 1000 (Cyc/sec) F(s)= 1/(2f) Example problem: 1000 hz = Highest frequency 1/2(1000hz) = 1/2000 = 5x10(-3) sec/cyc or a sampling rate of 5ms This is my first signal processing project using matlab. what i have so far. % Fs = frequency sampled (44100hz or the sampling frequency of a cd) [test,fs]=wavread('test.wav'); % loads the .wav file left=test(:,1); % Plot of the .wav signal time vs. strength time=(1/44100)*length(left); t=linspace(0,time,length(left)); plot(t,left) xlabel('time (sec)'); ylabel('relative signal strength') **%this is were i would need to sample it at the different frequecys (both above and below and at) nyquist frequency.*I think.*** soundsc(left,fs) % shows the resaultant audio file , which is the same as original ( only at or above nyquist frequency however) Can anyone tell me how to make it better, and how to do the various sampling at different frequencies?

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• Download Microsoft MSDN Magazine PDF Issues For Offline Reading

  - by Kavitha

  MSDN Magazine is a must read for every Microsoft developer. It provides in-depth analysis and excellent guides on all the latest Microsoft development tools and technologies. Every month one can grab this magazine on the stands or read it online for free. What if you want to read the magazine offline on your PC or mobile devices? Just grab a PDF version of the magazine and read it whenever you want. The PDF version of MSDN magazines are very handy for travellers who don’t get access to internet always. In this post we are going to provide you links to download PDF version, source code and online version of every month MSDN Magazine issue starting from 2010. Bookmark this post and keep checking it monthly to get access to MSDN Magazine links. December 2010 Issue    Download PDF(not yet available)    Download Source Code    Read Magazine Online        November 2010 Issue    Download PDF (not yet available)    Read Magazine Online    Download Source Code       October 2010 Issue    Download PDF    Download Source Code    Read Magazine Online        September 2010 Issue    Download PDF    Download Source Code    Read Magazine Online       August 2010 Issue    Download PDF    Download Source Code    Read Magazine Online       July 2010 Issue    Download PDF    Download Source Code    Read Magazine Online       June 2010 Issue    Download PDF    Download Source Code    Read Magazine Online       May 2010 Issue      Download PDF    Download Source Code    Read Magazine Online       April 2010 Issue    Download PDF    Read Magazine Online    Download Source Code       March 2010 Issue    Download PDF    Download Source Code    Read Magazine Online       February 2010 Issue    Download PDF    Download Source Code    Read Magazine Online       January 2010 Issue    Download PDF    Download Source Code    Read Magazine Online This article titled,Download Microsoft MSDN Magazine PDF Issues For Offline Reading, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• OpenGL ES 2.0: Using VBOs?

  - by Bunkai.Satori

  OpenGL VBOs (vertex buffer objects) have been developed to improve performance of OpenGL (OpenGL ES 2.0 in my case). The logic is that with the help of VBOs, the data does not need to be copied from client memory to graphics card on per frame basis. However, as I see it, the game scene changes continuously: position of objects change, their scaling and rotating change, they get animated, they explode, they get spawn or disappear. In such highly dynamic environment, such as computer game scene is, what is the point of using VBOs, if the VBOs would need to be constructed on per-frame basis anyway? Can you please help me to understand how to practically take beneif of VBOs in computer games? Can there be more vertex based VBOs (say one per one object) or there must be always exactly only one VBO present for each draw cycle?

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• MBA versus MSIS

  - by user794684

  I am considering going back to school for my masters and I've been looking at several avenues I can take. I've been considering either an MBA or an MSIS degree. Overall I know that an MBA is going to give me a solid skill set that can help me become an executive. However they seem to be a dime a dozen these days and the University I can get into is good, but it's not exactly in the top 100 anything. My undergrad MINOR was in Business Information Systems. I'm rusty as hell, considering I haven't touched it, but an MSIS would be more in the direction of my past academic experience and seems to touch both on business management and IT. Question... With an MSIS will I just be a middleman? Will I really be an important person with a real skill set or will I merely be someone who isn't quite cut out to be a manager and who is clueless about the tech side? Is an MSIS degree going to give me a real chance to move up the pay scale quickly or am I better off learning programing, networking through another BS degree? What will give me more upward mobility career wise? An MBA or an MSIS?

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• Where do we put "asking the world" code when we separate computation from side effects?

  - by Alexey

  According to Command-Query Separation principle, as well as Thinking in Data and DDD with Clojure presentations one should separate side effects (modifying the world) from computations and decisions, so that it would be easier to understand and test both parts. This leaves an unanswered question: where relatively to the boundary should we put "asking the world"? On the one hand, requesting data from external systems (like database, extental services' APIs etc) is not referentially transparent and thus should not sit together with pure computational and decision making code. On the other hand, it's problematic, or maybe impossible to tease them apart from computational part and pass it as an argument as because we may not know in advance which data we may need to request.

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• Games to Vista Game explorer with Inno Setup

  - by Kraemer

  Ok, i'm trying to force my inno setup installer to add a shortcut of my game to Vista Games Explorer. Theoretically this should do the trick: [Files] Source: "GameuxInstallHelper.dll"; DestDir: "{app}"; Flags: ignoreversion overwritereadonly; [Registry] Root: HKLM; Subkey: SOFTWARE\dir\dir; Flags: uninsdeletekeyifempty Root: HKLM; Subkey: SOFTWARE\dir\dir; ValueName: Path; ValueType: String; ValueData: {app}; Flags: uninsdeletekey Root: HKLM; Subkey: SOFTWARE\dir\dir; ValueName: AppFile; ValueType: String; ValueData:{app}\executable.exe ; Flags: uninsdeletekey [CustomMessages] en.Local=en en.removemsg=Do you wish to remove game saves and settings? en.taskentry=Play [Code] const PlayTask = 0; AllUsers = 2; Current = 3; type TGUID = record Data1: Cardinal; Data2, Data3: Word; Data4: array [0..7] of char; end; var GUID: TGUID; function GetDC(HWND: DWord): DWord; external '[email protected] stdcall'; function GetDeviceCaps(DC: DWord; Index: Integer): Integer; external '[email protected] stdcall'; function ReleaseDC(HWND: DWord;DC: DWord): Integer; external '[email protected] stdcall'; function ShowWindow(hWnd: DWord; nCmdShow: Integer): boolean; external '[email protected] stdcall'; function SetWindowLong(hWnd: DWord; nIndex: Integer; dwNewLong: Longint):Longint; external '[email protected] stdcall'; function GenerateGUID(var GUID: TGUID): Cardinal; external 'GenerateGUID@files:GameuxInstallHelper.dll stdcall setuponly'; function AddToGameExplorer(Binary: String; Path: String; InstallType: Integer; var GUID: TGUID): Cardinal; external 'AddToGameExplorerW@files:GameuxInstallHelper.dll stdcall setuponly'; function CreateTask(InstallType: Integer; var GUID: TGUID; TaskType: Integer; TaskNumber: Integer; TaskName: String; Binary: String; Parameters: String): Cardinal; external 'CreateTaskW@files:GameuxInstallHelper.dll stdcall setuponly'; function RetrieveGUIDForApplication(Binary: String; var GUID: TGUID): Cardinal; external 'RetrieveGUIDForApplicationW@{app}\GameuxInstallHelper.dll stdcall uninstallonly'; function RemoveFromGameExplorer(var GUID: TGUID): Cardinal; external 'RemoveFromGameExplorer@{app}\GameuxInstallHelper.dll stdcall uninstallonly'; function RemoveTasks(var GUID: TGUID): Cardinal; external 'RemoveTasks@{app}\GameuxInstallHelper.dll stdcall uninstallonly'; function InitializeSetup(): Boolean; var appath: string; ResultCode: Integer; begin if RegKeyExists(HKEY_LOCAL_MACHINE, 'SOFTWARE\dir\dir') then begin RegQueryStringValue(HKEY_LOCAL_MACHINE, 'SOFTWARE\dir\dir', 'Path', appath) Exec((appath +'\unins000.exe'), '', '', SW_SHOW, ewWaitUntilTerminated, ResultCode) end else begin Result := TRUE end; end; procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep); begin if CurUninstallStep = usUninstall then begin if GetWindowsVersion shr 24 > 5 then begin RetrieveGUIDForApplication(ExpandConstant('{app}\AWL_Release.dll'), GUID); RemoveFromGameExplorer(GUID); RemoveTasks(GUID); UnloadDll(ExpandConstant('{app}\GameuxInstallHelper.dll')); end; end; if CurUninstallStep = usPostUninstall then begin if MsgBox(ExpandConstant('{cm:removemsg}'), mbConfirmation, MB_YESNO)=IDYES then begin DelTree(ExpandConstant('{app}'), True, True, True); end; end; end; procedure CurStepChanged(CurStep: TSetupStep); begin if GetWindowsVersion shr 24 > 5 then begin if CurStep = ssInstall then GenerateGUID(GUID); if CurStep = ssPostInstall then begin AddToGameExplorer(ExpandConstant('{app}\AWL_Release.dll'), ExpandConstant('{app}'), Current, GUID); CreateTask(3, GUID, PlayTask, 0, ExpandConstant('{cm:taskentry}'), ExpandConstant('{app}\executable.exe'), ''); CreateTask(3, GUID, 1, 0, 'Game Website', 'http://www.gamewebsite.com/', ''); end; end; end; The installer works just fine, but it doesn't place a shortcut of my game to Games explorer. Since i believe that the problem is on the binary file i guess for that part i should ask for some help. So, can anyone please give me a hand here?

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• Code Review tools - to use or not?

  - by liortal

  On my dev team, we're doing code reviews, however not in a proper way i believe. The issues our process suffers from: Not enough time is allocated for proper code review. Doing reviews is not mandatory - many times it is simply not done. Devs sit together for reviews, due to lack of another easy mechanism for doing it "offline" without spending both developers' time. My question is: can integration of a tool for code reviews improve the points mentioned above? Is it not needed? I would love to hear from positive/negative experiences.

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