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  • HTML Canvas: Should my app x, y values be global?

    - by Joe
    I have a large file of functions. Each of these functions is responsible for drawing a particular part of the application. My app has x and y parameters that I use in the setup function to move the whole app around in order to try different placements. So, naturally, I need to use these x and y values to anchor each function's component rendering so that everything moves in unison if the global x,y values ever change. My question is, is it bad practice/architecture to have these x,y values in the global namespace and having the each function directly access them like so? function renderFace() { var x = App.x; var y = App.y; // drawing here } is there a better way i'm missing?

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  • Breakout... Getting the ball reflection X angle when htitting paddle / bricks

    - by Steven Wilson
    Im currently creating a breakout clone for my first ever C# / XNA game. Currently Ive had little trouble creating the paddle object, ball object, and all the bricks. The issue im currently having is getting the ball to bounce off of the paddle and bricks correctly based off of where the ball touches the object. This is my forumala thus far: if (paddleLocation.Intersects(ballLocation)) { position.Y = paddleLocation.Y - texture.Height; motion.Y *= -1; // determine X motion.X = 1 - 2 * (ballLocation.X - paddleLocation.X) / (paddleLocation.Width / 2); } The problem is, the ball goes the opposite direction then its supposed to. When the ball hits the left side of the paddle, instead of bouncing back to the left, it bounces right, and vise versa. Does anyone know what the math equation is to fix this?

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  • Google Goals process not working through similarly named pages

    - by David
    Well, I'm at a loss. I've ensured that my tracking script is in etc etc, and I've set up my goal and funnel path, but only the first step is ever being shown on the funnel. Goal URL: /checkout/checkoutComplete/ Type: Head Match ... but should this be /checkout/checkoutComplete/(.*) and set to regex rather because there are parameters after the main part of the URL (I thought that's what head match was for) Step 1: /checkout/ <-- required Step 2: /checkout/confirm/ both the above are valid and correct URLs for my domain. But for some reason, the funnel visualization shows entries into the first step, then an exits count that matches the entry count, including /checkout/confirm - but it doesn't go on to the next step! Perhaps I'm doing something obviously wrong...but I can't quite see it? Also, semi-related questions. Making a change to the funnel, does it only affect new incoming data? And how often does it update? Thanks in advance for your help.

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  • Calling all developers building ASP.NET applications

    - by Laila Lotfi
    We know that developers building desktop apps have to contend with memory management issues, and we’d like to learn more about the memory challenges ASP.NET developers are facing. To be more specific, we’re carrying out some exploratory research leading into the next phase of development on ANTS Memory Profiler, and our development team would love to speak to developers building ASP.NET applications. You don’t need to have ever used ANTS profiler – this will be a more general conversation about: - your current site architecture, and how you manage the memory requirements of your applications on your back-end servers and web services. - how you currently diagnose memory leaks and where you do this (production server, or during testing phase, or if you normally manage to get them all during the local development). - what specific memory problems you’ve experienced – if any. Of course, we’ll compensate you for your time with a $50 Amazon voucher (or equivalent in other currencies), and our development team’s undying gratitude. If you’d like to participate, please just drop me a line on [email protected].

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  • How to Get Along With a Colleague You Hate

    - by CatherineRussell
    1. Resist sending back scathing looks or words. There is no good to be gained by lowering yourself to their position. 2. Never, ever respond negatively in writing. 3. Should or should we not approch HR with these type of problems? 4. This is my favorite tip - Kill 'em with kindness To read more, go to: http://www.ehow.com/how_4729640_along-colleague-hate.html Technorati Tags: tutorials

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  • Low process priority problem

    - by Svepe
    I have just set Ubuntu 12.04 64bit with Cinnamon desktop and 3.5.0-030500 kernel on my new laptop with IvyBridge i7. I decided to test its performance by running a single threaded CPU-hungry program that I often use for camera calibration. Unfortunately, it ended up running much slower than I have ever expected. After some investigation it turned out that the program priority is automatically changed from normal to low which makes the program even slower. I have also noticed that all user programs such as Skype and Firefox are set to low priority. I tried manually resetting the priority to normal or even very high using the "renice" command, which works temporary until the kernel scheduler (I guess) resets the priority to low. Is this a normal behaviour and how can I overcome the problem with slowing down the execution? P.S. I also tried with the 3.2 kernel, but the problem is still present.

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  • How to check that I have recovered from Penguin 2.0?

    - by Simon Walker
    I have 3 year old website which has been hit by Penguin 2.0 in May. The website traffic dropped almost 30%. I have been working hard from last 2.5 months on the website and my website's traffic recovered in last week of August. In fact, I am receiving more traffic then ever. When I look at the stats, I find my website's search engine visibility has been improved. It is now appearing for more search queries. My website's impressions have also increased. What I am worried about is that my website is nowhere in top 5 pages for keywords having high competition and carrying the highest search volume. They are few in number but important. Should I consider my current situation as recovery or it's just the partial recovery? If it is only partial, then how come traffic is more then it was before penguin 2.0?

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  • How can I determine if a cube is adjacent to another cube, and optimize its buffers if so?

    - by Christian Frantz
    I'm trying to optimize the rendering of a collection of cubes, (based on an answer I was given to another question I asked). I understand the logic behind occlusion culling, but I'm having trouble with the code. When I create a cube, I want to determine if that cube is touching another existing cube, and if so I don't want to generate the redundant data in my vertex or index buffers. I'm planning on making a method that I call from my cube constructor so that everytime I create a cube, these checks are made, and neither occluded face is ever drawn. How would I go about this?

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  • Caption Competition 3: Caption With a Vengeance

    - by Simple-Talk Editorial Team
    Please to be informing us what might be going on here. Anything faintly computer-themed will always help, but being funny is more important. The one that raises the most chuckles from our team of professional miseryguts’ will win a $50 Amazon voucher. Get entries in before 5 p.m. UK time on the 30th of May to be eligible.  As ever, some suggestions to get you started: He didn’t know how developers kept getting into the server room, but by jove they wouldn’t get out again. Every time you build straight to production, it’s ten minutes with the bees. I know management’s resistant to the cloud, but was burying the IT department this far underground really necessary? After weeks of hunting, a group of highly trained Azure specialists capture the man responsible for branding.

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  • Firefox really slows down my computer

    - by user199208
    I love Firefox; it has a special place in my heart. However, using the default Firefox in Ubuntu eventually causes my computer to freeze and crash. Nothing more to the problem, just the performance of Firefox really sucks, therefor causing a system-wide freeze. How do I know this? I use Google Chrome mostly, and other programs. None of them ever made my computer freeze. Is it an Update problem? If so, can I install a different version of Firefox from Mozilla.com? What's the deal here?

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  • How can I upgrade to Lubuntu 14.04.1 withot a PAE kernel?

    - by Richard
    On my Dell Latitude D800 laptop, which has an old Pentium M without PAE support, I was able to successfully install Lubuntu 14.04 from the CD. When I try to upgrade, I get the error: PAE not enabled Your system uses a CPU that does not have PAE enabled. Ubuntu only supports non-PAE systems up to Ubuntu 12.04. To upgrade to a later version of Ubuntu, you must enable PAE (if this is possible) see: http://help.ubuntu.com/community/EnablingPAE I have seen the Communit Wiki page for PAE. The suggestion is to add forcepae to the command line options. When I do this, I get the same message. Moreover, dmesg does not indicate PAE was ever enabled. Is there anything else I can ry to get Lubuntu to upgrade correctly?

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  • Are Languages pretty much "stable" for now?

    - by Sauron
    Pardon the odd question, but I looked recently at a sort of "timeline" of Programming Languages and while alot has changed in the past 5-10 years and what has grown, there are alot of languages that have pretty much "stayed" the same in their same niche/use. Like for Example C.....we don't really ever see much languages being developed (Correct me if im wrong) to try to Unseat C, however there are alot of languages that try to do Similar things (Look at all the SQL/No-SQL languages) Scripting Languages, etc... Is there a reason for this? Or is it just because C does what C does so well.....that there isn't really a need?

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  • Video Did Not Kill the Podcast Star

    - by Justin Kestelyn
    Who says video killed the podcast star? We're seeing more favorites out there than ever before. For example, the OTN team is proud to be supporters of the Java Spotlight Podcasts, straight from the official Java Evangelist Team at Oracle (lots of great insider info); the OurSQL: The MySQL Database Podcasts, produced by MySQL maven (and Oracle ACE Director) Sheeri Cabral; and The GlassFish Podcast, always a reliable source. And we'd add The Java Posse and The Basement Coders to our personal playlist. And although we're on a video kick ourselves at the moment, you can still get the audio of our TechCast Live shows, if you think we have "faces for radio."

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  • I'm having trouble learning

    - by Gavin Sapp
    I'm only 13 but i'm genuinely interested in CS and would really like it if I could actually accomplish it. I've read books on C++ and C#, but ALL of them are the same!! They all say "Ok so since you have no prior knowledge in this what so ever, write a snippet that will do this and then make a GUI and then throw it into the Priafdhsu hfad then add the program and then program your own compiler to do some stuff". It's really getting annoying. I've payed near $40 (via Paypal) on ebooks that supposedly taught people to program with no prior knowledge. ALL OF THEM EXPECT ME TO ALREADY KNOW THE LANGUAGE. Is there something that I'm missing or am I suppose to be born with the property of CS? I would very much appreciate it if someone could explain this to me or possibly refer me to a tutorial on Programming Theory that starts from below ground zero as I have know knowledge in CS at all.

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  • Is it possible to allow the user to access the 'Volumes' without asking the Administrator's password?

    - by Tom
    Am the administrator of my Ubuntu system. Recently I added a new user account. But when ever the user tries to access or open the 'Volumes'(Drives where movies, songs and other files are stored) it asks for the Administrator's password. I created the user account to my other family members and I don't want to tell them my password. So is it possible to allow them to access the Volumes without asking Administrator's password ? UPDATE : Ubuntu was installed alongside Windows in my system. I will provide a screenshot of the Volume details -

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  • Google I/O 2012 - Deep Dive into the Next Version of the Google Drive API

    Google I/O 2012 - Deep Dive into the Next Version of the Google Drive API Ali Afshar, Ivan Lee This session discusses a number of best practices with the new Google Drive API. We'll cover how to properly sync files, how to manage sharing, and how to make your applications faster and more efficient than ever before. We'll go through an entire working application that exposes best practices. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 17 0 ratings Time: 45:50 More in Science & Technology

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  • Are there any useless language features in the C or C++ language? [closed]

    - by ThePlan
    As a beginner I often found myself saying "This is so useless. How can this ever help me?" only to find out later on that it is essential and I was a fool. The moral, however, tends to be that the C or the C++ language are perfect and they contain nothing of no-use to programmers. I'm asking this question for 2 reasons: out of pure curiosity and so that I may know what not to learn. In a nutshell - are there any useless language features in the C or the C++ language, which good programmers almost never use? It would also be of great help if you would mention weather they are a bad practice when used or just purely useless.

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  • Does anyone prefer proportional fonts?

    - by Jason Baker
    I was reading the wikipedia article on programming style and noticed something in an argument against vertically aligned code: Reliance on mono-spaced font; tabular formatting assumes that the editor uses a fixed-width font. Most modern code editors support proportional fonts, and the programmer may prefer to use a proportional font for readability. To be honest, I don't think I've ever met a programmer who preferred a proportional font. Nor can I think of any really good reasons for using them. Why would someone prefer a proportional font?

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  • What ethical problems realistically arise in programming?

    - by Fishtoaster
    When I co-oped during college, I had to fill out an evaluation of the co-op afterwards. One metric I always had to rate was how much the company required me to "Make ethical decisions related to your profession." This always seemed kinda silly- I mean, my first co-op was writing java apps to manage industrial radios. There wasn't much moral ambiguity going on. Anyway, I'm wonder what sort of ethical dilemmas one might actually encounter in software development. Edit: It should be noted that no ethically-trained software engineer would ever consent to write a DestroyBaghdad procedure. Basic professional ethics would require him to write a DestroyCity procedure, to which Baghdad could be given as a parameter. - Nathanial Borenstein

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  • Java Developers: Open-source Modules, Great Tools, Opportunity.

    - by Paul Sorensen
    The role of Java developer may just be better than ever. An excellent article in Java Magazine discusses the availability of web-based tools that help development teams more effectively manage their projects and modules. If you are a Java developer you should definitely read this article. I especially like the Expert Opinions scattered throughout the article. These highlight real-world usage of the latest and greatest development tools.  As you consider steps to move your career forward, consider Java certification. Oracle has over 15 unique Java certification credentials available. The process of becoming certified in Java and preparing for your exams will require you to study, learn and practice (code). All of this activity will help you sharpen your skills and increase your working knowledge of Java - making you a better developer and more valuable member of your team. You can use the Certification Finder on the Oracle certification homepage to find a Java certification that is right for you. Thanks! 

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  • OpenGL behaviour depending on the graphics card?

    - by Dan
    This is something that never happened to me before. I have an OpenGL code that uses GLSL shaders to texture a 3D model. The code involves a lot of GPU texture processing, blending, etc... I wanted to check how the performance of my code improves using a faster graphics card (both new and old are NVIDIA, using always the NVIDIA development drivers). But now I have found that once I run the code using the new graphics card, it behaves completely different (the final render looks wrong), probably because some blending effect is not performed correctly. I haven't really look into what has changed, but I am guessing that some OpenGL states are, by default, set different. Is this possible? Have you ever found different OpenGL/GLSL behaviour using different graphics cards? Any "fast" solution? (So far I've thought of plugging back the old one, push all OpenGL default states, and compare with the ones I initially get using the new card..)

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  • Cannot Update through Manager or Terminal/ Software Center Does Not Work

    - by BROBA
    I installed Tor a few days ago via the terminal. I deleted some hashtags in the gedit polipo, and changed my proxy settings in chrome, but was unable to make it work and have since changed all of it back. I then downloaded the Tor browser bundle which works great, but ever since then have been unable to download updates or new software. The update manager says to "check internet connection" and the software center displays a mostly blank screen under apps like "rhythmbox" and just says "available from main source" when I click on "use this source" a refresh symbol appears on the upper right corner of the software center for a split second, and then nothing happens. The app does not download and isn't available in the dash. When I try via the terminal it says it's unable to connect to my ip address. I tried changing the server and unchecking all the repository options for software sources, all to no avail. WHAT DID I DO?????

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  • Execure a random command from .txt file?

    - by Alberto Burgos
    I have a Ubuntu server, and I'm trying to print a Twitter quote using the app "twidge". So I made a list of tweets on a .txt file. I want to print one tweet (per line) from that file and send it to Twitter via twidge (or what ever other method was possible). I can print a random phrase with shuf: shuf -n 1 /var/www/tweets.txt and it works. It sends me back one of the tweets, but, it does not send it to Twitter, even if the "in line" phrase is a command. i.e: twidge update "bla bla bla" It just prints on the screen, but don't send it to Twitter. I tried turning the .txt to .sh, but don't work... any idea? by the way, i want to use it with crontab, something like this: 15 * * * * shuf -n 1 /var/www/tweets.txt

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  • Can't print, CUPS package corrupted and hangs on re-install

    - by Little Bobby Tables
    When I upgraded to Ubuntu 10.4 (Maverick), the upgrade process got stuck on the post-installation of the CUPS package. I had to kill processes and run several forced updates before I could finally get regular updated. Ever since I can't print - The printed file gets messed up and crashes the printer. I also can't re-install CUPS, as each time the installation hangs and I have to kill it before it completes. I tried to find a workaround for this problem, but in vain. Does anyone know how to bypass this? Or at least why can the post-installation hang, and how to re-install a problematic package? Some system specs and other hints: Dell D630 laptop running Ubuntu 10.4, Gnome desktop, standard LAN network, printing to an LPD server. Everything worked fine on 9.10. Also, the printed files themselves are not corrupted. The problem does not seem to be Evince-specific, but common to all printouts.

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  • System unable to boot in normal mode..! need to select recovery mode and than Generic Mode to boot.?

    - by Haresh Veera
    I am using Ubuntu Server 12.04 LTS KDE Mode. Couple of Days back I updated the system using Muon Package manager. After Updating, now when ever I boot the system, It get stuck at starting bluetooth Daemon Ok / Stopping Bluetooth Daemon Fail.and after long wait its get start to GUI Mode, but with no mouse detection. So need to reboot by pressing CTL+ALT+DEL and when I select recovery mode - Boot in Generic -- It boot perfectly. How can I set the same as default, and remove the error boot loader script. I am no expert to linux or Kernel.

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