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  • HTML5 Canvas Tileset Animation

    - by Veyha
    How to do in HTML5 canvas Image animating? I am have this code now: http://jsfiddle.net/WnjB6/1/ In here I am can add animations something like - Animation.add('stand', [0, 1, 2, 3, 4, 5]); But how to play this animation? My image drawing function is - drawTile(canvasX, canvasY, tile, tileWidth, tileHeight); Animation['stand']; return 0, 1, 2, 3, 4, 5 I am need something like when I am run Animation.play('stand') run animation from 'stand' array. I am try to do this something like one day, but no have more idea how. :( Thanks and sorry for my bad English language.

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  • What is the point in using real time?

    - by bobobobo
    I understand that using real time frame elapses (which should vary between 16-17ms on average) are provided by a lot of frameworks. GetTimeElapsedSinceLastFrame, and it gives you the wall clock time. But should we use this information in basic physics simulation? It looks to me to be a bad idea. Say there is a slight lag on the machine, for whatever reason (say a virus scanner starts up). The calculations all jump, and there is no need for this. Why not use a virtual second and ignore wall clock time? For gameplay on the level of Commander Keen, shouldn't you always use the virtual second and not real-time? (Besides stopwatch timing for race games) I don't see a need to use real time and not a fixed 16ms time step.

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  • iOS NSError with global handler

    - by Sebastian Dressler
    I am in the beginning of programming an iOS app. Having read the Apple guides on how to deal with errors, I got the following most important points: Exceptions are for programmers Use NSError for the user Now, NSError is usually passed as out-argument which can then be used inside and has to be checked by the caller. However, I'm asking myself whether it is a good idea to use a global error handler, say a singleton which wraps around NSError and could be used to trigger errors and error handling from within the called function. Is there anything against that method or would it be a bad practice?

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  • Is it okay to have many Abstract classes in your application?

    - by JoseK
    We initially wanted to implement a Strategy pattern with varying implementations of the methods in a commmon interface. These will get picked up at runtime based on user inputs. As it's turned out, we're having Abstract classes implementing 3 - 5 common methods and only one method left for a varying implementation i.e. the Strategy. Update: By many abstract classes I mean there are 6 different high level functionalities i.e. 6 packages , and each has it's Interface + AbstractImpl + (series of Actual Impl). Is this a bad design in any way? Any negative views in terms of later extensibility - I'm preparing for a code/design review with seniors.

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  • Is Java a good choice for cross-platform games?

    - by CommunistPancake
    I'm looking to create a game in Java and would like it to work on Windows, Linux, and Mac. I'm pretty sure C# is a bad choice for this, and I don't have enough experience in C or C++. I want to stay away from Flash. Therefore, Is Java a good choice for me? Mostly, I use C#, and think that Java is similar, so I assume it won't be that hard to learn. But is it fast enough? Is there a language more suited for my needs than Java?

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  • What's the correct approach for passing data from several models into a service?

    - by Doug Chamberlain
    I have an AccountModel and a page where the user can upload a file. What I would like to have happen is when the user uploads the file. The PageController does something like the following. this is a quick attempt just written in the question to illustrate my question. public class PageController : Controller { private Service service; public ActionResult Upload(HttpPostedFileBase f){ service.savefile(f,_AccountModel_whatever.currentlyloggedinuser.taxid) } } public class Service { // abunch of validation and error checking to make sure the file is good to store } Wouldn't this approach be in bad practice? Since I'm making my controller dependent on the existence of th AccountModel? This will become a HUGE program over the next few years, and I really want to maximize the quality of the framework now.

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  • Automatic login option is missing in 12.04

    - by grossogrossum
    Automatic login option is missing from System Settings User Accounts, how can I solve this? I either can't set the automatic login by editing /etc/lightdm/lightdm.conf [SeatDefaults] autologin-user=x autologin-user-timeout=0 user-session=ubuntu greeter-session=unity-greeter After restart login screen asks for my password. There is a thread in Ubuntu forums http://ubuntuforums.org/showthread.php?p=11889259 . It's in lubuntu forum, but there are ubuntu users afected too. I'm runing 12.04 (precise) 64-bit with Kernel Linux 3.2.0-24-generic. Excuse my bad english, please.

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  • Validation and Verification explanation (Boehm) - I cannot understand its point

    - by user970696
    Hopefully my last thread about V&V as I found the B.Boehm is text which I just do not understand well (likely my technical English is not that good). http://csse.usc.edu/csse/TECHRPTS/1979/usccse79-501/usccse79-501.pdf Basically he says that verification is about checking that products derived from requirements baseline must correspond to it and that deviation leads only to changes in these derived products (design, code). But he says it begins with design and ends with acceptance tests (you can check the V model inside). The thing is, I have accepted ISO12207 in terms of all testing is validation, yet it does not make any sense here. In order to be sure the product complies with requirements (acceptance test) I need to test it. Also it says that validation problems means that requirements are bad and needs to be changed - which does not happen with testing that testers do, who just checks correspondence with requirements.

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  • seo value of duplicating content externally

    - by Don
    I run a website that includes a blog which was hand-coded by myself and is hosted on the same domain. My partner in this endeavour thinks it would be a good idea to open up a blogger/wordpress blog and duplicate the on-site blog on this off-site blog. AFAIK the main reason for doing this is the SEO benefits of the inbound links that this off-site blog will create. I think this is a bad idea, because: Effectively what we're doing is creating a (very small scale) link farm We're more likely to be punished than rewarded (in SEO terms) for duplicating our content across domains This introduces a problem of synchronising our content across domains. For example, if a blog post is edited on the on-site blog, then ideally the off-site blog should be similarly updated. I know very little about SEO, so would be interested to hear what more informed readers have to say.

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  • What do the various dpkg flags like 'ii' 'rc' mean?

    - by theTuxRacer
    I frequently need to check which packages are installed, and I use the following command: dpkg -l | grep foo which gives the following output Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Description ii foo <version> <description> What does the ii mean? What other flags are there? How to read the flags? (because the explanation is quite complicated, IMO) Thanks.

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  • What's the difference between "Service" and "/etc/init.d/"?

    - by Marco Ceppi
    I've been managing server installations both on and off Ubuntu flavor for some time - I've become quite adjusted to /etc/init.d/ for restarting servcies. Now I get this message: root@tatooine:~# /etc/init.d/mysql status Rather than invoking init scripts through /etc/init.d, use the service(8) utility, e.g. service mysql status Since the script you are attempting to invoke has been converted to an Upstart job, you may also use the status(8) utility, e.g. status mysql mysql start/running, process 14048 This seems to have been brought about in the latest LTS of Ubuntu - why? What's so bad about /etc/init.d/ and what/is there a difference between service and /etc/init.d/?

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  • What most games would benefit from having

    - by Phil
    I think I've seen "questions" like this on stackoverflow but sorry if I'm overstepping any bounds. Inspired by my recent question and all the nice answers (Checklist for finished game?) I think every gamedev out there has something he/she thinks that almost every game should have. That knowledge is welcome here! So this is probably going to be an inspirational subjective list of some sorts and the point is that anyone reading this question will see a point or two that they've overlooked in their own development and might benefit from adding. I think a good example might be: "some sort of manual or help section. Of course it should be proportional to how advanced the game is. Some users won't need it and won't go looking for it but the other ones that do will become very frustrated if they can't remember how to do something specific that should be in the manual". A bad example might be "good gameplay". Of course every game benefits from this but the answer is not very helpful.

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  • Issues with external mounting after pysdm removed

    - by K. R. Huard
    So, I'm very new to ubuntu. I was having troubles getting my external hard drive to be read/write permission. It's owner is my macbook, and writing on the drive was repeatedly denied. In trying to sort this out, I tried the Nautilus commands (no success), installed the PYSDM application, changed some things (as suggested by this user in this forum http://askubuntu.com/a/113992 )but then found that I was getting an error message whenever I tried to mount an external storage device. The error is: Unable to mount DERPSTICK error mounting: mount exited with exit code 1: helper failed with: [mntent]: line 14 in etc/fstab is bad mount: only root can mount /dev/sdc1/ on /media/sdc1 Others with similar problems put their fstab up here, but I'm not sure how to bring it up, or if I should even try. Thanks for your time!

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  • Should single purpose utility app use a class

    - by jmoreno
    When writing a small utility app, that does just one thing, should that one thing be encapsulated in a seperate class, or just let it be part of whatever class/module is used to start the application? I.e. Main would consist of 2 or three lines calling the constructor and then the DoIt methods, nothing else. Or should Main be the DoIt method, with whatever functions it needs added to the main class? Asking because I want to get some alternative perspective, but couldn't find a similar question. If my google-fu is bad and there's a dup, please close.

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  • After power manager reinstall

    - by tuxi
    I had checking battery state hanging I solved it with the help of an answer from this site: sudo apt-get --reinstall install gnome-power-manager But now my left windows bar is rigid, it does not disappear on wide screen. EDIT Also in most of applications, characters are white. What could be the problem? and what should I do? 2ND EDIT My ubuntu is 12.04 LTS. I was trying to install some packages for dependencies of allegro game development library, one of the packages was libwxgtk2.8-0, after that a red cross appeared near user name and clock. Then computer became frozen and i had to remove my battery. I know it is a very bad thing. Then when i try to restart my computer, it could not start, it was waiting on black screen with line: Checking battery state... Then i run the above command. Computer could start but characters are white.

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  • Redesigning foreign website for my portfolio and offer it?

    - by BeatMe
    Hi, I've had an interest in web design for a long time and am constantly trying to learn something new. I do not have any references in my portfolio, but would like to start freelancing. Is it bad practice to redesign a website from a local company and use it for my portfolio? Do I infringe any copyright? What if I offer the redesign to the company? Has someone done this before? If so, share your experiences.

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  • Is there a way to play music from a server through the network and have two computers as speakers?

    - by Alvar
    Hi, I have a server (Ubuntu 8.04 server) that I want to use as a music player. I want my laptop Ubuntu 10.04 to be one speaker and my mac pro (mac os x 10.6) to be the other. Okay software is found and setup is done, (thanks for the pictures @JorgeCastro.) all of the softwares in both computers and server is setup how should I continue? http://www.pulseaudio.org/wiki/FirstSteps well if the sound is bad, is there a solution like compressing the sound files before sending them to the speaker? then you could improve sound quality and lower the data stream.

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  • And if I ask the job interviewer for reasons to join the company?

    - by Oscar
    In job interviews I am frequently asked if I know the company, explain why do I think I would be the best choice for this company, etc and I have never liked this kinds of questions. Using your experiences in job interviewing, what do you think it would happen if I ask the interviewer to explain me why he think the company is the best company for me and why I should accept their answer? Do you think it would be a good think or bad thing to do? Edit: the idea of the question would not be to "challenge" the interviewer. The idea of the question would be to see what he thinks about the company, what values he thinks are given importance inside the company and what are the strong points of the company.

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  • Dynamic Components

    - by Alex
    I am attempting to design a component-based architecture that allows Components to be dynamically enabled and disabled, much like the system employed by Unity3D. For example, all Components are implicitly enabled by default; however, if one desires to halt execution of code for a particular Component, one can disable it. Naively, I want to have a boolean flag in Component (which is an abstract class), and somehow serialize all method calls into strings, so that some sort of ComponentManager can check if a given Component is enabled/disabled before processing a method call on it. However, this is a pretty bad solution. I feel like I should employ some variation of the state paradigm, but I have yet to make progress. Any help would be greatly appreciated,

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  • Do I lose/gain performance for discarding pixels even if I don't use depth testing?

    - by Gajoo
    When I first searched for discard instruction, I've found experts saying using discard will result in performance drain. They said discarding pixels will break GPU's ability to use zBuffer properly because GPU have to first run Fragment shader for both objects to check if the one nearer to camera is discarded or not. For a 2D game I'm currently working on, I've disabled both depth-test and depth-write. I'm drawing all objects sorted by their depth and that's all, no need for GPU to do fancy things. now I'm wondering is it still bad if I discard pixels in my fragment shader?

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  • Frustrated by the VS2012 'Light' and 'Dark' themes?

    - by ihaynes
    Like me you may be have been frustrated by the lack of colour in VS2012. The flat look, reminicent of the early 'Gem' OS is bad enough, but when the only choices are a washed out white look or the deadly all-black look, it's not an easy product to work with.Fortunately MS themselves seem to have quietly taken notice of this, or at least one of their developers has, and a 'Color Theme Editor' extension has been released. This comes with some much better colour schemes (I'm using the blue one, which is fairly close to VS2010) and also allows you to create and edit themes youself.This extension doesn't come up when you search 'Extensions and Updates' but can be found at http://tinyurl.com/6rhkdejWith this, using VS2012 finally becomes a pleasurable experience.

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  • SEO - Hidden content before main site content

    - by 0pt1m1z3
    I have a two hidden divs before my main site content, one with the login form and another with the signup form. I then have login and signup buttons within the page that use JQuery to show or hide these divs. I like the effect this setup offers, dropping down from the top of the page and pushing the rest of the content down. However, recently I have been getting serious about SEO and I am wondering if these divs have been affecting my SERP rankings. Basically, every non-logged page (everything bots see) has the same two display:none; divs at the top of the document flow. Is it bad? Should I re-engineer these forms and the way they are displayed?

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  • Does Google pick up anchor text that is in nested elements?

    - by dangerDAN
    When Google looks at anchor text on a website, will it pickup the text if it is inside nested elements? So for example: <a href="http://www.google.com/">Visit Google</a> To: <a href="http://www.google.com/"> <div class="circle"> <span>Visit Google</span> </div> </a> The reason I ask is because I want to use css3 elements for certain links on my website, to style them as circles. But the anchor text needs to be picked up for these links, so I want to know wether or not the above is bad practice in this case.

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  • Sudden crash with gnome and unity

    - by cent89
    I've a Toshiba Satellite Pro U400 with Ubuntu 11.10. Very often when I'm working on the pc reboots itself, or close all programs and return to the login screen. This is very annoying, often I lose my job I'm doing, sometimes I make bad figures while projecting slides or movies in public. What happens is that with Unity 3 with Gnome, so I do not depend on these. I also checked the log files but with little success because I can not interpret them the best. Can you help me solve this serious problem? thanks. Roberto

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  • Writing a basic C Shell - understanding argv[] [on hold]

    - by Flame
    I have an assignment for my class to write a basic C Shell. I have found many pages that explain parts of it and some fully implemented code. I'm not going to copy, i'm just using it right now as a way to get started. So I'm at the beginning of this project obviously. One example I am looking at parses the user's input and stores a pointer to the beginning of the argument in char *argv[3]; Am I just misunderstanding this or would this technically break if there are more than 3 arguments? (say /a.out arg1 arg2 arg3 etc). Would I wanna malloc this somehow? I know a.out is considered argv[0], and the arguments argv1 - however many there are. It's probably bad practice to have too many arguments for a program, but I still would at least want to address it as I don't know what my TA's are going to use to test my shell.

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