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  • Network really slow with TL-WN951N wireless card

    - by Sam
    I literally just installed ubuntu and it seems to be working great except the network is deadly slow. I'm running a TL-WN951N wireless card which can download at about 600-700 KB/s in windows but in Ubuntu the max speed it seems to get is around 5KB/s. I guess I should note that my WAP is only wireless-G but like I said, I can get much better speeds in Windows. I'm testing the speeds by downloading files from here: http://mirror.internode.on.net/pub/test/ Anyone have any idea? I saw some people recommend downloading drivers and compiling them myself but I'm really really new to all of this so would appreciate someone babying me through it so I don't brick my computer! Here are the results of lspci -v: 04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02) Subsystem: Giga-byte Technology GA-EP45-DS5 Motherboard Flags: bus master, fast devsel, latency 0, IRQ 44 I/O ports at c000 [size=256] Memory at e9110000 (64-bit, prefetchable) [size=4K] Memory at e9100000 (64-bit, prefetchable) [size=64K] [virtual] Expansion ROM at e9120000 [disabled] [size=64K] Capabilities: <access denied> Kernel driver in use: r8169 Kernel modules: r8169 05:02.0 Network controller: Atheros Communications Inc. AR5008 Wireless Network Adapter (rev 01) Subsystem: Atheros Communications Inc. Device 3071 Flags: bus master, 66MHz, medium devsel, latency 168, IRQ 18 Memory at e9200000 (32-bit, non-prefetchable) [size=64K] Capabilities: <access denied> Kernel driver in use: ath9k Kernel modules: ath9k

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  • What amount of physical RAM would a typical "commodity class" server have, as of late 2013?

    - by marathon
    I'm trying to spec out servers for my company's infrastructure group to build. They tell me anything more than 2GB is too much, which I find ridiculous considering cheap DRAM is about 15 bucks a dimm in bulk and our particular software runs better with more memory. I tried to find out how much google servers use, and pinning down a number is hard. Best I could find in a google research paper was that in 2008, their commodity servers were using 2 and 4GB dimms, but the paper never said how many. I realize "commodity server" is a vague term, but I'm just looking for a rough range in RAM used. I suspect at least 16GB is going to be the norm.

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  • LWJGL Text Rendering

    - by Trixmix
    Currently in my project I am using LWJGL and the Slick2D library to render text onto the screen. Here is a more specific example: Font f = new Font("Times New Roman",Font.BOLD,18); font = new UnicodeFont(f); font.getEffects().add(new ColorEffect(Color.white)); font.addAsciiGlyphs(); try { font.loadGlyphs(); } catch (SlickException e) { e.printStackTrace(); } then i use font.drawString to write onto the screen. This is a quick easy way but it has a lot of disadvantages. for example font.loadGlyphs take a very long time 1-3 seconds. so when i want to change a color or font type then i have to wait 1-3 seconds which means I cannot do it while rendering (ie. cant have different color text on the same screen). My question is what is a better way of drawing multicolored text onto the screen? I use slick2d only for the text rendering so maybe i can fully get rid of the library and draw text some other way... If you have an answer please leave a quick short example. Thanks!

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  • Android-Libgdx-ProGuard: Usefulness without DexGuard? [on hold]

    - by Rico Pablo Mince
    So I'm developing a game for Android - using LibGDX - and noticed that the Android SDK (HDK, MDK, WhatTheHellEvarDK) has ProGuard built-in. Browsing the ProGuard page is like searching Google: you get that the idea is to sell some product (in this case, it's DexGuard). That leaves me wondering what features are left out of ProGuard that a game developer targeting Android should worry about. For instance, the ProGuard FAQs answer the question: "Does ProGuard encrypt string constants?" by saying: "No. String encryption in program code has to be perfectly reversible by definition, so it only improves the obfuscation level. It increases the footprint of the code. However, by popular demand, ProGuard's closed-source sibling for Android, DexGuard, does provide string encryption, along with more protection techniques against static and dynamic analysis." Alright. OK. But isn't "...improves the obfuscation level" EXACTLY what ProGuard is supposed to do? Are there better options that can be implemented at build-time in Eclipse using the Gradle options and Libgdx? In particular, the assets folder and res-specific folders will need some protection. The code itself doesn't cure cancer, but I'd prefer if nobody could copy/paste it with different game art and call it "IhAxEdUrGamE"....

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  • Developing a Configurable Pricing Program

    - by Ben DeMott
    The organization I work at has some interesting requirements when it comes to pricing for online commerce. Currently the developers write different 'pricing rules' and those rules can be applied to our items based on attributes of the items. For Example: INPUTS: [cost, sug_retail, discontinued, warehouse_qty, orderable_qty, brand, type, days_available, shipping_rate, weight, map_protected, map_discount] MATCH: brand=x, warehouse_qty 1, discontinued=True, map_protected=False SET: retail_price = (sug_retail * 0.95), offer_price1 = (cost * 1.25 + shipping_rate) I am looking to allow the merchandising team to have more control over the pricing and formulas - they are afterall technical enough to write excel formulas. I've been looking at writing a desktop application that uses something like numexpr http://code.google.com/p/numexpr/ or http://sympy.org/en/index.html to allow non-programmers to integrate their own logic into our pricing backend. We have multiple price-tiers we have to set, for multiple markets, so an elegant solution is needed. It's getting frustrating for the dev team to continually tweak/manage all of the pricing rules (we sell over 200 brands in 3 markets). My question is; does this seem like a decent approach? Can you think of a better way to parse string-mathematical-grammer? Can you think of a different way for users to provide formula's to integrate into a automated pricing system? Does anyone know of any examples of existing applications that do this? Excel, and Access are out of the question - the volume of data we manipulate has already proven the need to automate it - now we just need some visibility into that automation.

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  • Should we be able to deploy a single package to the SSIS Catalog?

    - by jamiet
    My buddy Sutha Thiru sent me an email recently asking about my opinion on a particular nuance of the project deployment model in SQL Server Integration Services (SSIS) 2012 and I’d like to share my response as I think it warrants a wider discussion. Sutha asked: Jamie What is your take on this? http://www.mattmasson.com/index.php/2012/07/can-i-deploy-a-single-ssis-package-from-my-project-to-the-ssis-catalog/ Overnight I was talking to Matt who confirmed that they got no plans to change the deployment model. For example if we have following scenrio how do we do deploy? Sprint 1 Pkg1, 2 & 3 has been developed and deployed to UAT. Once signed off its been deployed to Live. Sprint 2 Pkg 4 & 5 been developed. During this time users raised a bug on Pkg2. We want to make the change to Pkg2 and deploy that to UAT and eventually to LIVE without releasing Pkg 4 &5. How do we do it? Matt pointed me to his blog entry which I have seen before . http://www.mattmasson.com/index.php/2012/02/thoughts-on-branching-strategies-for-ssis-projects/ Thanks Sutha My response: Personally, even though I've experienced the exact problem you just outlined, I agree with the current approach. I steadfastly believe that there should not be a way for an unscrupulous developer to slide in a new version of a package under the covers. Deploying .ispac files brings a degree of rigour to your operational processes. Yes, that means that we as SSIS developers are going to have to get better at using source control and branching properly but that is no bad thing in my opinion. Claiming to be proper "developers" is a bit of a cheap claim if we don't even do the fundamentals correctly. I would be interested in the thoughts of others who have used the project deployment model. Do you agree with my point of view? @Jamiet

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  • Newbie seeking advice on programming in general

    - by user974685
    need some of you to remember back to a time when you might have been bad at programming... Been at my new job (as a software developer) for a couple of months now, passed probation period. Have very little programming experience (C++ only) and am currently working with asp.net MVC and silverlight. So there's a website the company has been working on and I am joining the effort to make it better, iron out bugs etc. The problem is - learning about a system/website which has already been made, via visual studio. I ALWAYS feel HUGELY overwhelmed, never knowing which part of this line should I look up, and generally having lots of trouble getting the big picture. Visual studio itself is something I'm finding it difficult to get to grips with, let alone the asp.net framework. I get the impression that because my coworkers have more experience than me, they are getting all the good jobs, and I am left with crap to do - stuff which is not even vaguely programming. Meaning they are learning/creating more, and I am learning/creating near nothing. I'm getting demoralised, and too scared to say anything. I'm not stupid, I've read and practiced plenty of the fundamental programming concepts...I'm just bloody scared of this damn framework. I look at it and just feel paralyzed. The result is that I keep asking the older veteran guy of questions, and he is getting irritated, and would rather give me easy/mindless/non programming jobs to avoid wasting time with helping me out. Then when I don't understand something, I'm hesitating about whether or not I should ask him yet, and trying to decide if it would be a waste of time. I'm the kind of person who picks things up slowly, but with a lot of attention to detail. The former I think is making me look incompetent though. Anyone get where I'm coming from please say something helpful....I'm scared of losing my job in a few months or something...

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  • How to change aging AD password while connected over VPN from Mac

    - by Franek Kuciapa
    I am connecting to the office from mac via VPN, Cisco AnyConnect Secure Mobility Client. I do not know what to do when my AD password on the firm side will age and approach expiration to ensure that my Mac and VPN continue to work afterwards. Is the proper thing to do in this case to connect via VPN and then change the password on Mac via System Preferences, Users & Groups? Will this update the AD on the server side? Will it sync the PointSec as well that is running on the Mac? Or is a better procedure to RDP to a Windows box while connected over VPN and change the password there hoping the Mac will somehow sync up ?? Running Mountain Lion on the Mac.

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  • Sync Gmail, Google Contacts, Google Calendar with Microsoft Exchange

    - by Steve Dolan
    At my work we only use Microsoft Exchange. As I hate Outlook and much prefer Google's services, I'd like to be able to sync my email, calendar, and contacts to a Gmail account. It looks like Google shut down their Google Sync service for Gmail accounts earlier this year: http://support.google.com/a/bin/answer.py?hl=en&answer=2716936. They are recommending IMAP, CalDAV, and CardDAV. I'm having trouble even setting up IMAP to work with Exchange. Is this the best way to go or is there a better solution?

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  • Ngingx won't start with fastcgi_split_path_info" error

    - by Ke
    I heard that nginx is faster and since I'm on a VPS with low RAM I thought I would try it out. I got through this tutorial http://www.howtoforge.com/installing-php-5.3-nginx-and-php-fpm-on-ubuntu-debian But I now get the following error: unknown directive "fastcgi_split_path_info" in /etc/nginx/sites-enabled/default:28 What might be causing the problem? I can't find any reference to the problem on Google. Also I have heard conflicting things about nginx vs Apache. Some say use one, some say the other. I'm using all sorts of things such as rewrite rules, proxies etc. Am I setting myself up for a fall by using nginx? If I go for Apache: how can I tweak it so that it performs better on a low RAM VPS?

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  • Pricing: Meet or Beat?

    - by charles.knapp
    My home dishwasher started making some really interesting noises. I heard radio advertisements from two retailers who promised to meet any competitor's price. Then, I heard another retailer promising that their everyday prices beat their competitors. That got me to thinking about the power of pricing and promotions in the marketing mix (product, price, placement, promotions, and people). What is more powerful to say in a competitive market: your company will meet a similar offer, or your company will beat the others? Will you sell more if you meet or if you beat? I found that the retailer who promised to beat the others really had the best everyday pricing. Even better for me, another retailer had an exclusive promotional sale for long-term customers. Their loyalty promotion beat the best everyday discounter. So, I got the quality and performance I wanted at a tremendous price. So, I have two challenges for marketers. First, where you really have to compete on price as a dominant factor, give people strong reasons to do business with you. If you try to meet other's prices, make the leap to actually beat and not merely meet. Second, upgrade your firm's capabilities where needed. Oracle offers a complete range of great CRM software for loyalty management, marketing promotions, and pricing management that will help you to grow your business.

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  • CodePlex Daily Summary for Thursday, December 23, 2010

    CodePlex Daily Summary for Thursday, December 23, 2010Popular ReleasesSSH.NET Library: 2010.12.23: This release includes some bug fixes and few new fetures. Fixes Allow to retrieve big directory structures ssh-dss algorithm is fixed Populate sftp file attributes New Features Support for passhrase when private key is used Support added for diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha256 and diffie-hellman-group-exchange-sha1 key exchange algorithms Allow to provide multiple key files for authentication Add support for "keyboard-interactive" authentication method...ASP.NET MVC SiteMap provider: MvcSiteMapProvider 2.3.0: Using NuGet?MvcSiteMapProvider is also listed in the NuGet feed. Learn more... Like the project? Consider a donation!Donate via PayPal via PayPal. Release notesThis will be the last release targeting ASP.NET MVC 2 and .NET 3.5. MvcSiteMapProvider 3.0.0 will be targeting ASP.NET MVC 3 and .NET 4 Web.config setting skipAssemblyScanOn has been deprecated in favor of excludeAssembliesForScan and includeAssembliesForScan ISiteMapNodeUrlResolver is now completely responsible for generating th...SuperSocket, an extensible socket application framework: SuperSocket 1.3 beta 2: Compared with SuperSocket 1.3 beta 1, the changes listed below have been done in SuperSocket 1.3 beta 2: added supports for .NET 3.5 replaced Logging Application Block of EntLib with Log4Net improved the code about logging fixed a bug in QuickStart sample project added IPv6 supportTibiaPinger: TibiaPinger v1.0: TibiaPinger v1.0Media Companion: Media Companion 3.400: Extract the entire archive to a folder which has user access rights, eg desktop, documents etc. A manual is included to get you startedPackage that minifies and combines JavaScript and CSS files: Release 1.1: Bug fixes. The package now correctly handles inlined images and image urls in CSS files surrounded by quotes. CombineAndMinify can now be used in conjunction with Microsoft's Sprite and Image Optimization Framework. That framework combines several small images into one, reducing overall load times.Multicore Task Framework: MTF 1.0.1: Release 1.0.1 of Multicore Task Framework.SQL Monitor - tracking sql server activities: SQL Monitor 3.0 alpha 7: 1. added script save/load in user query window 2. fixed problem with connection dialog when choosing windows auth but still ask for user name 3. auto open user table when double click one table node 4. improved alert message, added log only methodOpen NFe: Open NFe 2.0 (Beta): Última versão antes da versão final a ser lançada nos próximos dias.EnhSim: EnhSim 2.2.6 ALPHA: 2.2.6 ALPHAThis release supports WoW patch 4.03a at level 85 To use this release, you must have the Microsoft Visual C++ 2010 Redistributable Package installed. This can be downloaded from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=A7B7A05E-6DE6-4D3A-A423-37BF0912DB84 To use the GUI you must have the .NET 4.0 Framework installed. This can be downloaded from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=9cfb2d51-5ff4-4491-b0e5-b386f32c0992 - Fixing up some r...ASP.NET MVC Project Awesome (jQuery Ajax helpers): 1.4.3: Helpers (controls) that you can use to build highly responsive and interactive Ajax-enabled Web applications. These helpers include Autocomplete, AjaxDropdown, Lookup, Confirm Dialog, Popup Form, Popup and Pager new stuff: Improvements for confirm, popup, popup form RenderView controller extension the user experience for crud in live demo has been substantially improved + added search all the features are shown in the live demoGanttPlanner: GanttPlanner V1.0: GanttPlanner V1.0 include GanttPlanner.dll and also a Demo application.N2 CMS: 2.1 release candidate 3: * Web platform installer support available N2 is a lightweight CMS framework for ASP.NET. It helps you build great web sites that anyone can update. Major Changes Support for auto-implemented properties ({get;set;}, based on contribution by And Poulsen) A bunch of bugs were fixed File manager improvements (multiple file upload, resize images to fit) New image gallery Infinite scroll paging on news Content templates First time with N2? Try the demo site Download one of the templ...TweetSharp: TweetSharp v2.0.0.0 - Preview 6: Documentation for this release may be found at http://tweetsharp.codeplex.com/wikipage?title=UserGuide&referringTitle=Documentation. Note: This code is currently preview quality. Preview 6 ChangesMaintenance release with user reported fixes Preview 5 ChangesMaintenance release with user reported fixes Preview 4 ChangesReintroduced fluent interface support via satellite assembly Added entities support, entity segmentation, and ITweetable/ITweeter interfaces for client development Numer...Team Foundation Server Administration Tool: 2.1: TFS Administration Tool 2.1, is the first version of the TFS Administration Tool which is built on top of the Team Foundation Server 2010 object model. TFS Administration Tool 2.1 can be installed on machines that are running either Team Explorer 2010, or Team Foundation Server 2010.SubtitleTools: SubtitleTools 1.3: - Added .srt FileAssociation & Win7 ShowRecentCategory feature. - Applied UnifiedYeKe to fix Persian search problems. - Reduced file size of Persian subtitles for uploading @OSDB.Facebook C# SDK: 4.1.0: - Lots of bug fixes - Removed Dynamic Runtime Language dependencies from non-dynamic platforms. - Samples included in release for ASP.NET, MVC, Silverlight, Windows Phone 7, WPF, WinForms, and one Visual Basic Sample - Changed internal serialization to use Json.net - BREAKING CHANGE: Canvas Session is no longer support. Use Signed Request instead. Canvas Session has been deprecated by Facebook. - BREAKING CHANGE: Some renames and changes with Authorizer, CanvasAuthorizer, and Authorization ac...NuGet: NuGet 1.0 build 11217.102: Note: this release is slightly newer than RC1, and fixes a couple issues relating to updating packages to newer versions. NuGet is a free, open source developer focused package management system for the .NET platform intent on simplifying the process of incorporating third party libraries into a .NET application during development. This release is a Visual Studio 2010 extension and contains the the Package Manager Console and the Add Package Dialog. This new build targets the newer feed (h...WCF Community Site: WCF Web APIs 10.12.17: Welcome to the second release of WCF Web APIs on codeplex Here is what is new in this release. WCF Support for jQuery - create WCF web services that are easy to consume from JavaScript clients, in particular jQuery. Better support for using JsonValue as dynamic Support for JsonValue change notification events for databinding and other purposes Support for going between JsonValue and CLR types WCF HTTP - create HTTP / REST based web services. This is a minor release which contains fixe...Orchard Project: Orchard 0.9: Orchard Release Notes Build: 0.9.253 Published: 12/16/2010 How to Install OrchardTo install the Orchard tech preview using Web PI, follow these instructions: http://www.orchardproject.net/docs/Installing-Orchard-Using-Web-PI.ashx Web PI will detect your hardware environment and install the application. --OR-- Alternatively, to install the release manually, download the Orchard.Web.0.9.253.zip file. The zip contents are pre-built and ready-to-run. Simply extract the contents of the Orch...New ProjectsArabic Silverlight IE8 Web Slices: Group of IE8 web slices built on SilverlightAssaultCube Special Edition: Making the classic better!Blazonisation: If have emblem of some state, but don't know anything about it, you can use this tool to resolve your problem. Content Maintenance Dashboard: Content Maintenance Dashboard is a package for Umbraco which lets you bulk publlish, unpublish, move and delete of content items.DFTBASP: Drop files on the window choose permissions or Just backup option DMNarrator Manager: A tool for RPG Narrators (and dungeon masters). First version is focused to old Wolrd of DarknessdnnGr2 - Free DotNetNuke Skin: A free DotNetNuke skin initially created for the DotNetNuke Skinning Presentation at the 2nd meeting of the DNN Greek Community.Duplicate File Explorer: File search utility, that also shows what files are duplicate by name. Supports searching up to 3 different folders at one time, excluding folders or extensions and multiple search patterns.Elmax: Yet another easy to use C++ XML parsing library on Windows! Tutorial coming soon!Firemap: Generates a html page which displays key performance statistics of chosen computers. Jumony Guide: Guide for Jumony Milestone 1Loc Tracker: Location tracking system for android and a php server for managing setup of triggers and events to be notified.MBDeveloper: This is my personal project.MECMS: Its an self-developed ecms.Media Companion: Media Companion is a windows program that allows people to catalogue and browse movie and tv episode collections. Folders are scanned and information is automatically gathered from various sources, including posters, fanart and episode screenshots. MOSS 2007 WebPart for SSO to BlackBoard: This project includes a MOSS 2007 WebPart for Single Sign On (SSO) to a Blackboard 9 Learning Management System. Existing projects and code samples do not include resources for SharePoint 2007 (MOSS) or C#. The goal of to provide these missing resources.MutitouchTest Flash AS3 on IOS (iPhone iPad): MutitouchTest Flash AS3 on IOS (iPhone iPad) www.fbair.net ??????Ipad ????? ??, ???????????????????, ???11?. iTouch4 ????5?? ??????? ? ? ??? ???????????. iPad??????????????Netropya XCogen: XCogen is an xml file config generator for Castle, Unity Spring and StructureMap containers. It's a simple console application for post-build action.Nota Algoritmica EUI: Programa que obtiene del moodle de la asignatura las notas y calcula la media final.Powershell CmdLets for Citrix NetScaler: Powershell CmdLets for the Citrix Netscaler product. This enables for querying & modifying the netscaler configuration through powershell.Scenario Framework - BPM Suite: Business Process Management SystemSchool Authorization System: School Authorization SystemSharePoint Delete Dead Users: This is a small WPF Application that presents all dead users it finds and allows the user to delete them from SharePoint. dead users are users that are not found inside active directory. There is also an LDAP Filter to speed up the query from active directorySugataTools: SugataTools are the helper classes that I usually use in my projects.The Phoenix Foundation - OSAL: Another OSAL for Windows (desktop/mobile) & Linux support.TibiaPinger: Tibia Pinger, Tools, Bot, ArkBot, Tibia, NeoBot, TibiaAuto, NG, ElfBottracer: Modernizes the System.Diagnostics trace infrastructure APIs to bring dynamism, testability and composability to .NET logging.uQR: uQR is an Umbraco package which adds the ability to generate dynamic QR Codes to an Umbraco website.User Account Picture Manager: This little app will try to fetch a users picture from active directory (thumbnailPhoto) and sets this picture on Windows Vista/2008/7/2008 R2 as User Account PictureVirtual Shell Service: Virtual Shell Service, is a service that runs on your server allowing trusted users to interact with the system via a sand boxed environment. The service has been designed to support mapping terminal commands in different ways via plugins and XML mappingWindows Live Writer Codehighlighting Plugin For Alex Gorbatchev's SyntaxHighligh: Windows Live Writer Codehighlighting Plugin For Alex Gorbatchev's SyntaxHighlighter. More information about the proect please visit http://tugberkugurlu.com/41

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  • Gathering all data in single iteration vs using functions for readable code

    - by user828584
    Say I have an array of runners with which I need to find the tallest runner, the fastest runner, and the lightest runner. It seems like the most readable solution would be: runners = getRunners(); tallestRunner = getTallestRunner(runners); fastestRunner = getFastestRunner(runners); lightestRunner = getLightestRunner(runners); ..where each function iterates over the runners and keeps track of the largest height, greatest speed, and lowest weight. Iterating over the array three times, however, doesn't seem like a very good idea. It would instead be better to do: int greatestHeght, greatestSpeed, leastWeight; Runner tallestRunner, fastestRunner, lightestRunner; for(runner in runners){ if(runner.height > greatestHeight) { greatestHeight = runner.height; tallestRunner = runner; } if(runner.speed > ... } While this isn't too unreadable, it can get messy when there is more logic for each piece of information being extracted in the iteration. What's the middle ground here? How can I use only a single iteration while still keeping the code divided into logical units?

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  • Strict Pomodoro and other time management Chrome extensions

    - by kerry
    I have recently begun using the Pomodoro Technique to increase my productivity. However, I still find myself getting sucked in to the vortex of useless information that is the internet. With that in mind I began searching for a useful chrome extension to replace the Android Pomodoro app I have been using to manage my ‘doros. I even considered writing it myself. Luckily, I stumbled on one that had a similar featureset to what I was looking for. Strict Pomodoro is an excellent Chrome extension for practicing Pomodoro. Though lacking a few key features, such as the ability to set the duration of your pomodoros and breaks, it still has a key feature that helps me stay on task. It blocks time sucking websites. You can set filter lists and it will keep you from accessing them during a Pomodoro. Effectively reminding you to stay on task. Also, the author readily admits that it was quickly put together and new features may be added down the road. For now, it is still an excellent option. For those of you who do not practice Pomodoro but are trying to stay on task. The StayFocusd extension will effectively manage the amount of time you spend on useless (non-productive) sites. It also has a rich feature set that may be better for your work habits. OK, breaks over. Time to get back to work. 25 minutes at a time.

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  • Constant game speed independent of variable FPS in OpenGL with GLUT?

    - by Nazgulled
    I've been reading Koen Witters detailed article about different game loop solutions but I'm having some problems implementing the last one with GLUT, which is the recommended one. After reading a couple of articles, tutorials and code from other people on how to achieve a constant game speed, I think that what I currently have implemented (I'll post the code below) is what Koen Witters called Game Speed dependent on Variable FPS, the second on his article. First, through my searching experience, there's a couple of people that probably have the knowledge to help out on this but don't know what GLUT is and I'm going to try and explain (feel free to correct me) the relevant functions for my problem of this OpenGL toolkit. Skip this section if you know what GLUT is and how to play with it. GLUT Toolkit: GLUT is an OpenGL toolkit and helps with common tasks in OpenGL. The glutDisplayFunc(renderScene) takes a pointer to a renderScene() function callback, which will be responsible for rendering everything. The renderScene() function will only be called once after the callback registration. The glutTimerFunc(TIMER_MILLISECONDS, processAnimationTimer, 0) takes the number of milliseconds to pass before calling the callback processAnimationTimer(). The last argument is just a value to pass to the timer callback. The processAnimationTimer() will not be called each TIMER_MILLISECONDS but just once. The glutPostRedisplay() function requests GLUT to render a new frame so we need call this every time we change something in the scene. The glutIdleFunc(renderScene) could be used to register a callback to renderScene() (this does not make glutDisplayFunc() irrelevant) but this function should be avoided because the idle callback is continuously called when events are not being received, increasing the CPU load. The glutGet(GLUT_ELAPSED_TIME) function returns the number of milliseconds since glutInit was called (or first call to glutGet(GLUT_ELAPSED_TIME)). That's the timer we have with GLUT. I know there are better alternatives for high resolution timers, but let's keep with this one for now. I think this is enough information on how GLUT renders frames so people that didn't know about it could also pitch in this question to try and help if they fell like it. Current Implementation: Now, I'm not sure I have correctly implemented the second solution proposed by Koen, Game Speed dependent on Variable FPS. The relevant code for that goes like this: #define TICKS_PER_SECOND 30 #define MOVEMENT_SPEED 2.0f const int TIMER_MILLISECONDS = 1000 / TICKS_PER_SECOND; int previousTime; int currentTime; int elapsedTime; void renderScene(void) { (...) // Setup the camera position and looking point SceneCamera.LookAt(); // Do all drawing below... (...) } void processAnimationTimer(int value) { // setups the timer to be called again glutTimerFunc(TIMER_MILLISECONDS, processAnimationTimer, 0); // Get the time when the previous frame was rendered previousTime = currentTime; // Get the current time (in milliseconds) and calculate the elapsed time currentTime = glutGet(GLUT_ELAPSED_TIME); elapsedTime = currentTime - previousTime; /* Multiply the camera direction vector by constant speed then by the elapsed time (in seconds) and then move the camera */ SceneCamera.Move(cameraDirection * MOVEMENT_SPEED * (elapsedTime / 1000.0f)); // Requests to render a new frame (this will call my renderScene() once) glutPostRedisplay(); } void main(int argc, char **argv) { glutInit(&argc, argv); (...) glutDisplayFunc(renderScene); (...) // Setup the timer to be called one first time glutTimerFunc(TIMER_MILLISECONDS, processAnimationTimer, 0); // Read the current time since glutInit was called currentTime = glutGet(GLUT_ELAPSED_TIME); glutMainLoop(); } This implementation doesn't fell right. It works in the sense that helps the game speed to be constant dependent on the FPS. So that moving from point A to point B takes the same time no matter the high/low framerate. However, I believe I'm limiting the game framerate with this approach. Each frame will only be rendered when the time callback is called, that means the framerate will be roughly around TICKS_PER_SECOND frames per second. This doesn't feel right, you shouldn't limit your powerful hardware, it's wrong. It's my understanding though, that I still need to calculate the elapsedTime. Just because I'm telling GLUT to call the timer callback every TIMER_MILLISECONDS, it doesn't mean it will always do that on time. I'm not sure how can I fix this and to be completely honest, I have no idea what is the game loop in GLUT, you know, the while( game_is_running ) loop in Koen's article. But it's my understanding that GLUT is event-driven and that game loop starts when I call glutMainLoop() (which never returns), yes? I thought I could register an idle callback with glutIdleFunc() and use that as replacement of glutTimerFunc(), only rendering when necessary (instead of all the time as usual) but when I tested this with an empty callback (like void gameLoop() {}) and it was basically doing nothing, only a black screen, the CPU spiked to 25% and remained there until I killed the game and it went back to normal. So I don't think that's the path to follow. Using glutTimerFunc() is definitely not a good approach to perform all movements/animations based on that, as I'm limiting my game to a constant FPS, not cool. Or maybe I'm using it wrong and my implementation is not right? How exactly can I have a constant game speed with variable FPS? More exactly, how do I correctly implement Koen's Constant Game Speed with Maximum FPS solution (the fourth one on his article) with GLUT? Maybe this is not possible at all with GLUT? If not, what are my alternatives? What is the best approach to this problem (constant game speed) with GLUT? I originally posted this question on Stack Overflow before being pointed out about this site. The following is a different approach I tried after creating the question in SO, so I'm posting it here too. Another Approach: I've been experimenting and here's what I was able to achieve now. Instead of calculating the elapsed time on a timed function (which limits my game's framerate) I'm now doing it in renderScene(). Whenever changes to the scene happen I call glutPostRedisplay() (ie: camera moving, some object animation, etc...) which will make a call to renderScene(). I can use the elapsed time in this function to move my camera for instance. My code has now turned into this: int previousTime; int currentTime; int elapsedTime; void renderScene(void) { (...) // Setup the camera position and looking point SceneCamera.LookAt(); // Do all drawing below... (...) } void renderScene(void) { (...) // Get the time when the previous frame was rendered previousTime = currentTime; // Get the current time (in milliseconds) and calculate the elapsed time currentTime = glutGet(GLUT_ELAPSED_TIME); elapsedTime = currentTime - previousTime; /* Multiply the camera direction vector by constant speed then by the elapsed time (in seconds) and then move the camera */ SceneCamera.Move(cameraDirection * MOVEMENT_SPEED * (elapsedTime / 1000.0f)); // Setup the camera position and looking point SceneCamera.LookAt(); // All drawing code goes inside this function drawCompleteScene(); glutSwapBuffers(); /* Redraw the frame ONLY if the user is moving the camera (similar code will be needed to redraw the frame for other events) */ if(!IsTupleEmpty(cameraDirection)) { glutPostRedisplay(); } } void main(int argc, char **argv) { glutInit(&argc, argv); (...) glutDisplayFunc(renderScene); (...) currentTime = glutGet(GLUT_ELAPSED_TIME); glutMainLoop(); } Conclusion, it's working, or so it seems. If I don't move the camera, the CPU usage is low, nothing is being rendered (for testing purposes I only have a grid extending for 4000.0f, while zFar is set to 1000.0f). When I start moving the camera the scene starts redrawing itself. If I keep pressing the move keys, the CPU usage will increase; this is normal behavior. It drops back when I stop moving. Unless I'm missing something, it seems like a good approach for now. I did find this interesting article on iDevGames and this implementation is probably affected by the problem described on that article. What's your thoughts on that? Please note that I'm just doing this for fun, I have no intentions of creating some game to distribute or something like that, not in the near future at least. If I did, I would probably go with something else besides GLUT. But since I'm using GLUT, and other than the problem described on iDevGames, do you think this latest implementation is sufficient for GLUT? The only real issue I can think of right now is that I'll need to keep calling glutPostRedisplay() every time the scene changes something and keep calling it until there's nothing new to redraw. A little complexity added to the code for a better cause, I think. What do you think?

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  • How to avoid tilde ~ in Bash prompt?

    - by Jirka
    Hello! I have set my prompt in bash in a such way that I can use it directly in scp command: My current PS1 string: PS1="\h:\w\n$" And the prompt looks like this: lnx-hladky:/tmp/plugtmp $ What I don't like at all is the fact that $HOME directory is displayed as tilde. Can this be avoided? It's causing problems when switching between different users. Example: lnx-hladky:~/DOC $ Documentation says: \w : the current working directory, with $HOME abbreviated with a tilde \W: the basename of the current working directory, with $HOME abbreviated with a tilde Is there any possibility to avoid $HOME being abbreviated with a tilde? I have found one way around but I feel like it's overcomplicated: PROMPT_COMMAND='echo -ne "\e[4;35m$(date +%T)\e[24m$(whoami)@$(hostname):$(pwd)\e[m\n"' PS1=$ Can anyone propose a better solution? I have a feeling it's not quite OK to run so many commands just to get prompt. (date,whoami,hostname,pwd). Thanks a lot! Jirka

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  • windows server 2008 vs ubuntu 11 [closed]

    - by user472875
    I am working on implementing a custom server application that should be capable of handling a very large volume of traffic. I am aware that this type of question has been asked a lot, but I haven't been able to find a good answer. What I'm really looking for is for a server with given specs which OS will be able to handle a larger traffic faster and more reliably. I do not care about rights management or any other features. I am fairly good with both platforms, and so I would like to pick the OS with better performance on a clean install, and with nothing else running. Thanks in advance.

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  • Business Analyst role in development process

    - by Ryan
    I work as a business analyst and I currently oversee much of the development efforts of an internal project. I'm responsible for the requirements, specs, and overall testing. I work closely with the developers (onshore and offshore). The offshore team produces all of the reports. Version 1.0 had a 9 month development cycle and I had about 4-5 months to test all the reports. There was the usual back and forth to get the implementation right. Version 2.0 had a much shorter development cycle (3 months). I received the first version of the reports about 3 weeks ago and noticed a lot of things wrong with it. Many of the requirements were wrong and the performance of the queries was horrendous at 5x - 6x longer than it should have been. The onshore lead developer was out and did not supervise the offshore development team in generating the reports. Without consulting management, I took a look at the SQL in the reports and was able to improve performance greatly (by a factor of 6x) which is acceptable for this version. I sent the updated queries as guidelines to the offshore team and told them they should look at doing X instead of Y to improve performance and also to fix some specific logic issues. I then spoke to my managers about this because it doesn't feel right that I was developing SQL queries, but given our time crunch I saw no other way. We were able to fix the issue quite fast which I'm happy with. Current situation: the onshore managers aren't too pleased that the offshore team did not code for performance. I know there are some things I could have done better throughout this process and I do not in any way consider myself a programmer. My question is, if an offshore team that works apart from the onshore project resources fails to deliver an acceptable release, is it appropriate to clean up their work to meet a deadline? What kind of problems could this create in the future?

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  • SQL Server: One 12-drive RAID-10 array or 2 arrays of 8-drives and 4-drives

    - by ben
    Setting up a box for SQL Server 2008, which would give the best performance (heavy OLTP)? The more drives in a RAID-10 array the better performance, but will losing 4 drives to dedicate them to the transaction logs give us more performance. 12-drives in RAID-10 plus one hot spare. OR 8-drives in RAID-10 for database and 4-drives RAID-10 for transaction logs plus 2 hot spares (one for each array). We have 14-drive slots to work with and it's an older PowerVault that doesn't support global hot spares.

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  • How to configure Apache on Amazon Elastic Beanstalk

    - by Ian
    My PHP5.3 application is currently running on a Windows 2003 server running XAMPP 1.7.7 I've decided it will be better if I can get it moved onto the cloud, and Amazon Elastic Beanstalk looks like the easiest way to go. I'm starting with a 64bit Amazon Linux running PHP 5.3 container. My next step is to limit access to the website with an htpasswd file. I'd rather not use .htaccess files. How do I configure Beanstalk Apache conf file settings (on Windows the settings are stored in httpd.conf)?

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  • Does it matter the direction of a Huffman's tree child node?

    - by Omega
    So, I'm on my quest about creating a Java implementation of Huffman's algorithm for compressing/decompressing files (as you might know, ever since Why create a Huffman tree per character instead of a Node?) for a school assignment. I now have a better understanding of how is this thing supposed to work. Wikipedia has a great-looking algorithm here that seemed to make my life way easier. Taken from http://en.wikipedia.org/wiki/Huffman_coding: Create a leaf node for each symbol and add it to the priority queue. While there is more than one node in the queue: Remove the two nodes of highest priority (lowest probability) from the queue Create a new internal node with these two nodes as children and with probability equal to the sum of the two nodes' probabilities. Add the new node to the queue. The remaining node is the root node and the tree is complete. It looks simple and great. However, it left me wondering: when I "merge" two nodes (make them children of a new internal node), does it even matter what direction (left or right) will each node be afterwards? I still don't fully understand Huffman coding, and I'm not very sure if there is a criteria used to tell whether a node should go to the right or to the left. I assumed that, perhaps the highest-frequency node would go to the right, but I've seen some Huffman trees in the web that don't seem to follow such criteria. For instance, Wikipedia's example image http://upload.wikimedia.org/wikipedia/commons/thumb/8/82/Huffman_tree_2.svg/625px-Huffman_tree_2.svg.png seems to put the highest ones to the right. But other images like this one http://thalia.spec.gmu.edu/~pparis/classes/notes_101/img25.gif has them all to the left. However, they're never mixed up in the same image (some to the right and others to the left). So, does it matter? Why?

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  • How best to deal with the frustration that you encounter at the beginning of learning to code [closed]

    - by coderboy
    I am right now a newbie on the job learning to code in Cocoa . In the beginning I decided that I would try and understand everything I was doing . But right now I just feel like a clueless wizard chanting some spells . Its all just a matter of googling the right incantation . Frequently getting stuck and having to google for answers is proving to be a major demotivator for me . I know that this will get better over time but still I feel that somewhere , somehow I'm just approaching things the wrong way . I sit there stumped and then finally just look at sample code from Apple and I go Wow ! This is so logical and well structured ! . But just reading it is not going to get me to that level . So I would like to know , how do you guys approach learning something new . Do you read the whole documentation first , or do you read sample code or maybe its just about making lots of small programs first ?

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  • Need game development sandbox like Etoys to do 2D games prototyping

    - by Dimitry Tato
    I am new to game development, and currently working on development a mobile 2D game (for android). As the part of the development process, I need to build a prototype and playtest it, to see if the game mechanics and user interaction is ok For example: if I have a starship shooting at ememies, I need to see what's the best size for my starship. what trajectories should the enemy ships fly and what velocity. Should the enemy ships be coming only from left to right, or also from top Should the enemy ships form a 'flock' or just fly by themselves what's the best 'powerup' pickup mechanics: to shoot it, or to pick it with the ship etc Implementing these details directly in Java (Android) is time consuming and as many of the 'hypotheses' will be rejected, I also don't want to invest a lot of time to code thigs, majority of which gonna be rejected. I found 'tool' Etoys http://www.youtube.com/watch?v=34cWCnLC5nM&feature=related and official website http://www.squeakland.org/ which helps to build 'prototype' quickly, but Etoys is meant for children learning programming and is too basic. SO MY QUESTION IS: Is there any prototyping tool, as simple as Etoys and with better prototype quality?

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  • Ask a DNS server what sites it hosts - and how to possibly prevent misuse

    - by Exit
    I've got a server which I host my company website as well as some of my clients. I noticed a domain which I created, but never used, was being attacked by a poke and hope hacker. I imagine that the hacker collected the domain from either hitting my DNS server and requesting what domains are hosted. So, in the interest of prevention and better server management, how would I ask my own DNS server (Linux CentOS 4) what sites are being hosted on it? Also, is there a way to prevent these types of attacks by hiding this information? I would assume that DNS servers would need to keep some information public, but I'm not sure if there is something that most hosts do to help prevent these bandwidth wasting poke and hope attacks. Thanks in advance.

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  • Best/Preferred software for photography.

    - by chills42
    I am just getting into photography as a hobby, and am looking for some good tools for image uploading/browsing/editing. I am currently using the Canon EOS utility that came with the camera for uploading, Picasa for browsing, and GIMP for editing. Pros: The files are stored using the standard file system (no proprietary library like iPhoto) Great photo editing possibilities Free (except the Canon Utility, but that was bundled) Cons: Multiple programs Hard to view the Exif Data (I like the way that iPhoto displays the data) Over-simplified editing tools in Picasa What other tools should I look into? Also, I occasionally shoot in RAW, and would prefer Mac support (better monitor), but I also have windows and linux machines.

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