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• How do you ensure consistent experience across multiple graphics cards (or even driver versions)?

  - by Grigory Javadyan

  So I was writing a simple 2D game with OpenGL and SDL and had this problem when there was awful tearing when running in windowed mode (even though I explicitly asked SDL_SetVideoMode to use double buffering). Didn't worry about it all too much because most of the time the game grabs the entire screen, windowed mode is just for debugging. Anyway, yesterday I updated my nVidia drivers and tearing disappeared, the game runs smooth and looks nice in windowed mode too. I can see how the problem may be in the graphics driver, but this leads to a question. Obviously, professional game developers have to deal with a lot of different hardware/software configurations. What are the techniques they use to make sure the game looks the roughly the same on different graphics cards or even the same model of graphics card, but with different driver versions?

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• Can't remove c:/ubuntu folder pleas help?

  - by user98978

  hi today i downloaded ubuntu with wubi-installer on my windows 7 machine but after restarting pc and booting in ubuntu installer my pc shuts down while installing because my laptops battery was gone empty i forgot to plug in my adapter so ubunutu fails to install, then i booted in windows 7 to uninstall ubuntu from add/remove programs en reainstall but the uninstaller did not fully remove the files i still have i folder in my c:/ubuntu when i double click on that folder my explorer.exe stops responding and than i need to open the task manager to kill the explorer.exe procces and restart it and right clicking does the same thing i cant do anyting with c:/ubuntu folder to reinstall ubuntu with wubi i have used unlocker1.9 to remove the folder but i get an error saying Error 0x8007045D: The request could not be performed because of an I/O device error HUH ! please help please :( EDIT: Okay i fixed my problem after following this instruction ! i don't understand why you people did not ask me to do this but it's okay i forgive you my poeple LoL !

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• Are these interview questions too difficult for entry-level C++ positions?

  - by Banana

  I recently had a few interviews for programming jobs within the financial industry. I am looking for entry-level positions as I specify in the cover letter. However I am usually asked questions such as: - all two-letters commands you know in unix - representation of float/double numbers (ieee standard) - segmentation fault memory dump, and related issues - all functions you know to convert string to integer (not just atoi) - how to avoid virtual tables - etc.. Is that the custom? Because I don't think this kind of questions make sense for someone willing to get an entry-level job. Is it totally crazy to think that they should ask more conceptual questions? This is beginning to driving me nuts, honestly. Thanks

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• If I use locks, can my algorithm still be lock-free?

  - by Joe Pension

  A common definition of lock-free is that at least one process makes progress. 1 If I have a simple data structure such as a queue, protected by a lock, then one process can always make progress, as one process can acquire the lock, do what it wants, and release it. So does it meet the definition of lock-free? 1 See eg M. Herlihy, V. Luchangco, and M. Moir. Obstruction-free synchronization: Double-ended queues as an example. In Distributed Computing, 2003. "It is lock-free if it ensures only that some thread always makes progress".

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• Particles are not moving correctly [closed]

  - by cr33p

  I want to make a particle explosion, after something gets destroyed, but somehow only one line of mixed colors show up on the screen. Here's the header: http://pastebin.com/JW5bPLj2 Here's the source: http://pastebin.com/KHmFqytD I don't get what's wrong, as it's nearly the same as in "Programming Linux Games" Can somebody help me fix that? PS: "Uint32 delta" is needed to update the pixels based on time. PSS: Maybe I should add that it's programmed in C and includes SDL. EDIT: Found the problem. It was the "drawParticles" function. The problem was, that I passed a double to "offset" (as particles[i].x, etc are all doubles). So I ended up with values like ~MAX_INT because I didn't cast the doubles properly to ints.

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• Can't boot - "Waiting for Network Configuration"

  - by user213017

  After an update on 13.10, my PC won't boot Ubuntu any longer. It displays the infamous "Waiting for Network Configuration" message and then hangs. I can go into recovery mode, and choose "Start networking" and then go to a root prompt, and that works fine. Ping works. /etc/network/interfaces contains just the two lines "auto lo" and "iface lo inet loopback". I've double-checked that my network is working, the cable is working (it works on another PC) and the network card seems to indicate a connection. Any suggestions on how to get my PC booted again? Right now I'm limited to a root shell prompt.

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• What exactly does an installer do and why might I need one?

  - by Jan

  this is probably the noob-question of the day: So I've written this game. Now there's the .exe file that does the work, a folder with my beautiful, beautiful assets and a bunch of .dll files and other stuff that I probably shouldn't touch. To run the game, I copy the whole lot to the desired computer, double-click the .exe file and start shooting some dudes. Yay! But what exactly is the difference between that and using an installer? What else does an installer do besides copying files and looking more professional than a .zip-file? Is there generally a lot of patching/configuring involved when trying to make a game run on a different computer? I tested my game on all windows computers I could get my greedy fingers on and it works great. Thanks for your time.

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• Where to go from here, how to improve / learn more

  - by bExplosion

  I finished University around 4 years ago double degree in Software Eng/Comp Sci. Got my first job at a startup in my final year, was with them for 2.5 years then started my own business. So far everything is going great, lots of clients and stead work etc, but coming right out of uni and into a start up I never had any form or senior software engineer guiding my work or suggesting improvements etc... Whats the best way for me to improve & learn more? Books? MS Exams? Other? I develop in C#, ASP.NET/MVC. Update The problem isn't really with releasing products, I've released quite a few which are up and running with customers happy. It's more with quality of code, best practices, how do I know something I am code is correct, it may work but there may be ways of coding it much more efficiently or by adhering to some kind of standard Cheers for any responses! Matt

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• Is it correct to refer to a performing programming assignments as a "computer labs"?

  - by Nick Rosencrantz

  Can we say that developing an algorithm is a "laboration"? Are these "labs"? At engineering performing an exercise or an assignement is refered to as "labs" but are those "labs" when in fact it is mainly software problem solving pretty much like numeric methods in math which are not "labs". When studying engineering such as electrical engineering or physics you might do a "laser lab" or a "chemical laboration" if you study chemical engineering for instance. How do you define "lab"? Just performing something experimental? This is sort of double meaning also the physical environment at universities which we call "computer labs" that in fact are just rooms with computers.

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• How can I convince a project manager that there is no way to solve all the compatibility issues?

  - by SAFAD

  I have been working on this project for more than a year now, and we are close to release, the project manager wants the product to be perfect and working in every single aspect. I like that and I love working under the perfection idea, but it seems he is delaying the launch too much because of compatibility issues, he wants the product to work in every single installation, every single configuration possible, and in most cases, the product just works without issues when it's on the hands of the client. UPDATE : yes the product doesn't work properly when there are conflicts, for example, other products that don't use guidelines nor standards to load libraries (causes double library load which leads to failure), cache is another example and so on..... but we warn the clients about the conflict before purchasing and help them fixing it after purchasing I've tried to explain it by giving some examples on major products, he understands the situation, but can not believe that it is near impossible (if it is not impossible) to do what he wants. Hope it is clarified enough for the community to answer.

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• Open file with java application [migrated]

  - by Giaphage47

  I am using Ubuntu. I would like to have a user be able to double-click (or whatever they have set to open a file) on the save file for a java game i'm making, and have the game start and automatically load the save. How could I make the game launch instead of opening the file, and then pass the save's file name or location as an argument? Would i have to have the game create a new mime type the first time it ran, or something similar, so that Ubuntu knows what to do with the save when the user tries to open it?

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• Collision Detection within Player/Enemy Class

  - by user1264811

  I'm making a 2D platform game. Right now I'm just working on making a very generic Player class. I'm wondering if it would be more efficient/better practice to have an ActionListener within the Player class to detect collisions with Enemy objects (also have an ActionListener) or to handle all the collisions in the main world. Furthermore, I'm thinking ahead about how I will handle collisions with the platforms themselves. I've looked into the double boolean arrays to see which tiles players can go to and which they can't. I don't understand how to use this class and the player class at the same time. Thank you.

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• D'après-vous, quels sont les smartphones les plus réussis sous Android ? Participez à notre sondage

  D'après-vous, quels sont les smartphones les plus réussis sous Android ? Participez à notre sondage La fragmentation d'Android est un problème délicat pour les développeurs. D'autant plus qu'il est double : des versions de l'OS pour smartphones d'un coté et pour tablettes de l'autre, et des versions différentes de l'OS au sein de chaque catégorie. A cette complexité s'en ajoute une autre (contrairement à iOS) : la diversité des hardwares. Dont la première pour les développeurs est la différence des tailles d'écran. Enfin (contrairement à Windows Phone dont l'UI (Metro) n'est pas modifiable par les constructeurs), Android permet à chaque industriel de personnaliser l'interfa...

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• The Path to Best-In-Class Service Business Performance

  - by Charles Knapp

  What would it matter to offer your customers best-in-class service and support experiences? According to a new study, best-in-class companies enjoy margins that are nearly double the average, retain almost all of their customers each year, deliver annual revenue growth that is six greater than average, and realize cost decreases rather than increases! What does it take to become best in class? Some of the keys are: Engage customers effectively and consistently across all channels Focus on mobility to improve reactive service performance Continue to transition from primarily reactive to proactive and predictive service performance Build the support structure for new services and service contracts Construct an engaged service delivery team Join the Aberdeen Group, Oracle, Infosys, and Hyundai Capital as we highlight the key stages in the service transformation journey and reveal how Best-in-Class organizations are equipping themselves to thrive in this new era of service. Please join us for "Service Excellence and the Path to Business Transformation" -- this Thursday, October 25, 8:00 AM PDT | 11:00 AM EDT | 3:00 PM GMT | 4:00 PM BST.

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• Is there any problem with using two slashes in the middle of a URL? [closed]

  - by joshuahedlund

  Possible Duplicate: What does the double slash mean in URLs? I'm working on a mod_rewrite URL structure as follows: http://example.com/search/filter1/filter2/filter3/filter4 There are some conditions where it is OK for the first attribute to be blank, but i want to keep the other attributes in the same position. (Otherwise I can't assume that the attribute in the second position represents what I want it to represent.) However this results in some URLs like this: http://example.com/search//filter2/filter3/filter4 This seems to work in all browsers I've tested (Chrome,Firefox,IE9,IE compatible) and I'm not seeing any errors on the server side, so I can't think of any problems in using it. But it just looks wrong and weird to me and I'm not used to seeing it. Are there any potential downsides to using a structure that encourages URLs like this, or any major reasons no one seems to use it? (Everything I search in Google assumes I'm talking about the two slashes after http:)

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• Couldnt find a way to open blender software

  - by sapphirebox001

  I am new to Ubuntu. I downloaded the latest version of Blender (2.70a) from official blender.org site as an tar.bz2 file. My Ubuntu OS is 14.04 LTS amd64 bit os, and I am sure that I have downloaded the correct version of blender. I have read that for security reasons, Ubuntu does not allow executing exe files. Since the downloaded package contains blender as an executable/x-executable type, it is not able to execute. I do not have an internet connection in that computer too. Also the "Allow executing file as program" checkbox is checked by default. Still double clicking it does not execute the file. Can anyone say how to open this file? P.S: Wine also checked but requires active internet connection, which I dont have.

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• Why don't my Google Analytics custom segmentation visit numbers match up?

  - by Hates_

  I have three main areas of my site and want to track total usage as well as breakdowns of the three parts. I am trying to segment the "type" of use on each page using a custom variable as such: ['_setCustomVar',1,'Visitor Type','Unknown',1] Visitor type can be one of three values: "Unknown", "Reader" or "publisher". Every page has this value set. Now when I look at my analytics chart and chose all three segments, the individual values do not match the sum. I've double checked the pages to make sure the custom var is there.

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• L'informatique représente un tiers des offres d'emploi d'après l'APEC et le Syntec Numérique, mais 2012 reste très incertain

  L'informatique représente un tiers des offres d'emploi D'après le Baromètre APEC/Syntec Numérique, mais 2012 reste très incertain Alors que le contexte économique commence à montrer des signes de ralentissements, le Baromètre APEC/Syntec Numérique montre que l'emploi informatique continue à très bien se porter. L'IT représente au troisième trimestre 2011 plus du quart des offres d'emploi (+56 % sur les 12 derniers mois) Le Web reste le domaine le plus dynamique avec une demande qui a pratiquement doublé en un an. D'autres secteurs comme l'informatique industrielle ont également connu une croissance très soutenue (+85 %). Mais la fonction qui est aujourd'hui d...

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• Can not export JARS in lwjgl!

  - by NerdyLegend

  I did it before but for some reason it's doing the stupid problem again. I want to export as a regular Jar file, not a folder full of files. I export it like in Oskar Veerhoak. cmd says Exception in thread "main" java.lang.RuntimeException: Resource not found: res/F lubberFlap.png at org.newdawn.slick.util.ResourceLoader.getResourceAsStream(ResourceLoa der.java:69) at com_FlubberSpace.MainFS.main(MainFS.java:118) I tested it out with my other project with the same code pretty much. This is how I load my Textures wood = TextureLoader.getTexture("PNG", ResourceLoader.getResourceAsStream("res/wood.png")); of course it works fine in eclipse but not after export. I havn't tried giving the previous game its' own project, I have it in a package. Can someone record how to export properly? I want a jar file that you just double click to start it. I also want it so nobody can extract the files and see my classes and res.

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• Vector normalization gives very imprecise results

  - by Kipras

  When I normalize vectors I receive very strange results. The lengths of the normalized vectors range from 1.0 to almost 1.5. The functions are all written by me, but I just can't find a mistake in my algorithm. When I normalize I just divide all components of the vector by the vector's length. public double length(){ return Math.sqrt(x*x + y*y); } public void normalize(){ if(length() > 0){ x /= length(); y /= length(); } } Is this supposed to happen? I mean I can see the length ranging from 0.9 to 1.1 at worst, but this is just overwhelming. Cheers

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• Getting wireless N to work on Dell Vostro 3300?

  - by luisfpg

  I have a Dell Vostro 3300, which has a Broadcom BCM4313 wireless. The point is that I cannot make it work in N mode. NetwotkManager applet says I'm on 54 Mbit/s. Of course, my wireless router is N capable. I've double checked. Anyone knows what to do? Here is the output for lspci -v: 12:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01) Subsystem: Dell Device 0010 Flags: bus master, fast devsel, latency 0, IRQ 17 Memory at fbb00000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: wl Kernel modules: wl, brcm80211 Thanks a lot.

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• Is this a typo in the Artistic License 2.0?

  - by IQAndreas

  I'm not sure if this would fit better in StackExchange/English, but regardless, there is no practical use to the answer, other than to cure my curiosity. Note this sentence at the end of the Artistic License 2.0: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES. It does not affect any legal aspects of the license, but is there a reason they mixed the use of single and double quotes on AS IS? The license is so new that this wouldn't have been for "command prompt friendly" reasons. Is there special use or meaning behind this in the English language, or was it a typo?

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• Youtube controls (sound, etc) not functional in full-screen mode: is that normal?

  - by mlvljr

  When playing youtube videos full-screen, I can't mouse-interact with the player controls, except for the slider (only single-clicking on the video works as play/pause, but not double-click, interestingly, so the only way to leave full-screen mode is via Escape). Is this behavior known? What can I do about it? I'm on Ubuntu 12.04, using Google's Chrome browser. P.S. If that matters, some other flash players I've tried also display the same problem, so this may be an issue with Google-supplied Flash plugin. Thanks in advance.

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• Any help please, Not reconizing my hard drive

  - by Imperial0007

  If any1 can help would be much appreciated.. I recently build my own PC would like to use for gaming etc.. (With Ubuntu of course as my OS) Installed Ubuntu via Flash Drive Everything is connected. Purchased a Graphic card/GPU GPU info;(XFX Double D R9 270 925MHz Boost 2GB DDR5 DP HDMI 2XDVI Graphic card) Now my problem is when i put the CD to install the GPU Drivers it would not recognize the HDD So why is the hard drive not being recognized HDD info;(ADATA USA Premier pro SP600 32GB SATA) I am able to enter the BIOS menu (If that helps) Any help would be much appreciated & Thanks in advanced

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• spliiting code in java-don't know what's wrong [closed]

  - by ???? ?????

  I'm writing a code to split a file into many files with a size specified in the code, and then it will join these parts later. The problem is with the joining code, it doesn't work and I can't figure what is wrong! This is my code: import java.io.*; import java.util.*; public class StupidSplit { static final int Chunk_Size = 10; static int size =0; public static void main(String[] args) throws IOException { String file = "b.txt"; int chunks = DivideFile(file); System.out.print((new File(file)).delete()); System.out.print(JoinFile(file, chunks)); } static boolean JoinFile(String fname, int nChunks) { /* * Joins the chunks together. Chunks have been divided using DivideFile * function so the last part of filename will ".partxxxx" Checks if all * parts are together by matching number of chunks found against * "nChunks", then joins the file otherwise throws an error. */ boolean successful = false; File currentDirectory = new File(System.getProperty("user.dir")); // File[] fileList = currentDirectory.listFiles(); /* populate only the files having extension like "partxxxx" */ List<File> lst = new ArrayList<File>(); // Arrays.sort(fileList); for (File file : fileList) { if (file.isFile()) { String fnm = file.getName(); int lastDot = fnm.lastIndexOf('.'); // add to list which match the name given by "fname" and have //"partxxxx" as extension" if (fnm.substring(0, lastDot).equalsIgnoreCase(fname) && (fnm.substring(lastDot + 1)).substring(0, 4).equals("part")) { lst.add(file); } } } /* * sort the list - it will be sorted by extension only because we have * ensured that list only contains those files that have "fname" and * "part" */ File[] files = (File[]) lst.toArray(new File[0]); Arrays.sort(files); System.out.println("size ="+files.length); System.out.println("hello"); /* Ensure that number of chunks match the length of array */ if (files.length == nChunks-1) { File ofile = new File(fname); FileOutputStream fos; FileInputStream fis; byte[] fileBytes; int bytesRead = 0; try { fos = new FileOutputStream(ofile,true); for (File file : files) { fis = new FileInputStream(file); fileBytes = new byte[(int) file.length()]; bytesRead = fis.read(fileBytes, 0, (int) file.length()); assert(bytesRead == fileBytes.length); assert(bytesRead == (int) file.length()); fos.write(fileBytes); fos.flush(); fileBytes = null; fis.close(); fis = null; } fos.close(); fos = null; } catch (FileNotFoundException fnfe) { System.out.println("Could not find file"); successful = false; return successful; } catch (IOException ioe) { System.out.println("Cannot write to disk"); successful = false; return successful; } /* ensure size of file matches the size given by server */ successful = (ofile.length() == StupidSplit.size) ? true : false; } else { successful = false; } return successful; } static int DivideFile(String fname) { File ifile = new File(fname); FileInputStream fis; String newName; FileOutputStream chunk; //int fileSize = (int) ifile.length(); double fileSize = (double) ifile.length(); //int nChunks = 0, read = 0, readLength = Chunk_Size; int nChunks = 0, read = 0, readLength = Chunk_Size; byte[] byteChunk; try { fis = new FileInputStream(ifile); StupidSplit.size = (int)ifile.length(); while (fileSize > 0) { if (fileSize <= Chunk_Size) { readLength = (int) fileSize; } byteChunk = new byte[readLength]; read = fis.read(byteChunk, 0, readLength); fileSize -= read; assert(read==byteChunk.length); nChunks++; //newName = fname + ".part" + Integer.toString(nChunks - 1); newName = String.format("%s.part%09d", fname, nChunks - 1); chunk = new FileOutputStream(new File(newName)); chunk.write(byteChunk); chunk.flush(); chunk.close(); byteChunk = null; chunk = null; } fis.close(); System.out.println(nChunks); // fis = null; } catch (FileNotFoundException fnfe) { System.out.println("Could not find the given file"); System.exit(-1); } catch (IOException ioe) { System.out .println("Error while creating file chunks. Exiting program"); System.exit(-1); }System.out.println(nChunks); return nChunks; } } }

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