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  • Object-Oriented OpenGL

    - by Sullivan
    I have been using OpenGL for a while and have read a large number of tutorials. Aside from the fact that a lot of them still use the fixed pipeline, they usually throw all the initialisation, state changes and drawing in one source file. This is fine for the limited scope of a tutorial, but I’m having a hard time working out how to scale it up to a full game. How do you split your usage of OpenGL across files? Conceptually, I can see the benefits of having, say, a rendering class that purely renders stuff to screen, but how would stuff like shaders and lights work? Should I have separate classes for things like lights and shaders?

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  • How to turn a pdf into a text searchable pdf?

    - by don.joey
    I have a number of scanned documents in pdf and I want to be able to search them. How can I do that? Essentially I have to OCR the pdf and then blend the extracted text back into a new pdf. I have unsuccesfully tried pdfocr (which gives me this issue: https://github.com/gkovacs/pdfocr/issues/7) pdfsandwich (of which the software center says it is a poor package and I should not install it) Is there a software package I am unaware of? Or a script that does this?

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  • How To View Upcoming Weather, Sports Games, TV Shows, and More in Google Calendar

    - by Chris Hoffman
    Google Calendar isn’t just a tool to keep track of your own events. You can subscribe to a number of special calendars that automatically update with the latest weather, sports games, air times for your favorite TV shows, and more. This is the sort of thing that a paper calendar could never do, and what makes digital calendars like Google Calendar so useful. Add some automatically updating calendars and you’ll wonder how people ever used paper calendars. HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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  • What makes Instagram so valuable? [closed]

    - by ????
    If as in the FAQ, that topics about business (computer industry) is allowed here, I'd like to find out why Instagram can be so valuable, that it is acquired for $1 billion dollars (USD). To put it simply, isn't it just a photo enhancement app (such as making a photo vintage look), plus sharing those photos on Facebook? That's because in contrast, PlayFish had superb Facebook games, and many of them, and are so much more sophisticated (such as Restaurant City and Pet Society). And PlayFish was merely acquired for $400 million. Some companies such as RockYou, had the number one app on Facebook, but wasn't even acquired for a low price like $200 million. And now just a photo filter app and sharing photos, and it is a business considered to be worth a billion dollars. Why is that?

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  • First time using Ubuntu, need help with drivers!

    - by Nick
    I have just successfully built my first computer last night. I went through the boot menu and got Ubuntu 12.10 installed properly and everything. My question is...now what? There has to be some sort of drivers I need to install right? I can't connect to wi-fi or anything of that sort. I have an ASUS motherboard, model number M4N98TD EVO , and an NVIDIA Geforce GTX 650 grpahics card. I guess my main question is, can someone run me through step by step what I need to do after I install Ubuntu?

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  • Checking for DBNull

    - by Jim Lahman
    Using a table adapter to a SQL Server database table that returns a NULL record.  We determine the fields are NULL by comparing against System.DBNull Looking the NULL records in SQL Management studio   Using a table adapter to retrieve a record   1: try 2: { 3: this.vTrackingTableAdapter.FillByTrkZone(this.dsL1Write.vTracking, iTrkZone); 4: } 5: catch (Exception ex) 6: { 7: sLogMessage = String 8: .Format("Error getting coil number from tracking table at {0} - {1}", 9: sTrkName, 10: ex.Message); 11: throw new CannotReadTrackingTableException(sLogMessage); 12: }   Looking at the record as it returned from the table adapter:   ItemArrayObject Column [0] ChargeCoilNumber [1] HeadWeldZone [2] TailWeldZone [3] ZoneLen [4] ZoneCoilLen [5] Confirmed [6] Validated [7] EntryWidth [8] EntryThickness   Since each item in the ItemArray is an object, we can test for null   1: if (dsL1Write.vTracking.Rows[0].ItemArray[0] == System.DBNull.Value) 2: { 3: throw new NoCoilAtPORException("NULL coil found at tracking zone " + sTrkName); 4: }   If no records were returned by the table adapter 1: if (dsL1Write.vTracking.Rows.Count == 0) 2: { 3: throw new NoCoilAtPORException("No coils found at tracking zone " + sTrkName); 4: }

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  • Lean/Kanban *Inside* Software (i.e. WIP-Limits, Reducing Queues and Pull as Programming Techniques)

    - by Christoph
    Thinking about Kanban, I realized that the queuing-theory behind the SW-development-methodology obviously also applies to concurrent software. Now I'm looking for whether this kind of thinking is explicitly applied in some area. A simple example: We usually want to limit the number of threads to avoid cache-thrashing (WIP-Limits). In the paper about the disruptor pattern[1], one statement that I found interesting was that producer/consumers are rarely balanced so when using queues, either consumers wait (queues are empty), or producers produce more than is consumed, resulting in either a full capacity-constrained queue or an unconstrained one blowing up and eating away memory. Both, in lean-speak, is waste, and increases lead-time. Does anybody have examples of WIP-Limits, reducing/eliminating queues, pull or single piece flow being applied in programming? http://disruptor.googlecode.com/files/Disruptor-1.0.pdf

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  • Reasonable size for "filesystem reserved blocks" for non-OS disks?

    - by j-g-faustus
    When creating a file system ( mkfs ...) the file system reserves 5% of the space for its own use because, according to man tune2fs: Reserving some number of filesystem blocks for use by privileged processes is done to avoid filesystem fragmentation, and to allow system daemons, such as syslogd(8), to continue to function correctly after non-privileged processes are prevented from writing to the filesystem. But with large drives 5% is quite a lot of space. I have 4x1.5 TB drives for data storage (the OS runs on a separate disk), so the default setting would reserve 300 GB, which is an order of magnitude more than the the entire OS drive. The reserved space can be tweaked, but what is a reasonable size for a data disk? Can I set it to zero, or could that lead to issues with fragmentation?

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  • Unified Communications Suite Ships New Version

    - by joesciallo
    We shipped the latest version (7.0.5.0.0) of Unified Communications Suite. The following information should get you started: Get the Software New Features Release Notes Some Changes for 7.0.5.0.0 Convergence: Version 3.0.0.0.0 enables you to use the add-on framework to add third-party services to the Convergence UI. These services include: Advertising Click-to-call service Multinetwork IM SMS (both one-way and two-way) Social media applications (Facebook, Twitter, and Flickr) Video and voice calling capability For more information, see Overview of Add-on Services in Convergence. Calendar Server: Version 7.0.4.14.0 provides a number of security enhancements, including supporting the SSL protocol for all front-end and back-end communications, and the ability to list hosts that are allowed to send iSchedule POST requests. For more information, see Securing Communications to Calendar Server Back Ends. New Platform Support: Oracle GlassFish Server 3, Oracle Solaris 11, and Oracle Enterprise Linux 6.x are supported in this release of Communications Suite.

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  • How would you represent an object that can be of multiple types, when storing it as a document in MongoDB?

    - by blueberryfields
    Somewhat related to this question, say that I have an object category which, depending on which type of object I have, has different restrictions on what it contains. (if you can reword the previous sentence to make more sense I'd appreciate it) For example var SomeSchema = new Schema({ _id: ObjectID, [... large number of common fields ...] type: //Restricted somehow to members of a fixed array data: //depending on type, this might be restricted - sometimes an integer, sometimes array, etc... }); What's the idiosyncratic method for defining this type of schema? Is it appropriate to define a single schema, and handle the types inside of it's members, or am I better off with separate schema for each type?

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  • How can I detect and delete all lost configuration folders?

    - by Takkat
    Over the time there is an increasing number of hidden .configuration folders in my home folder. Many of these come from applications I only installed for testing or from applications that I don't use any more. I would not mind really but these folders do clutter my home, and worse than that sum up to as much as 80 GBytes by now. As there are also applications I never heard of (at least I can't remember I had installed them) I hesitate to delete them. Is there a way to find out which folders came from purged applications? May there even be a way to auto-remove a configuration folder when purging (not removing) the application that created it?

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  • Social media exchange strategies

    - by Wladimir Ivanov
    Recently I've stumbled upon some [B]facebook/twitter/g+[/B] and other social site [B]tools[/B] which offer [B]like for like[/B]. As I know from personal experimenting following certain people/pages on twitter also gives you followers. What's your opinion on this type of social media exchange (I know the fans/followers you get are only number which couldn't help much with growing your site)? Which of these sites are proven to boost some statistics? Are there other better exchange tactics? Thanks in advance.

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  • Simple form validation

    - by ElendilTheTall
    Hi, I have a site with a simple contact form using ASP for customers to e-mail quote requests. However, I'm getting quite a few messages through with no contact information; I think people assume that their e-mail address is coming through automatically. I'd like a simple way to make the e-mail and/or telephone number fields required, preferably so that the fields are highlighted as such if they're submitted without anything in them. I've Googled for this but they seem either too simple, diverting people to a separate page and requiring a 'back click', or incredibly complicated with massive reams of code. Any suggestions?

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  • Add Custom Color Changing RGB LED Lighting to Your Next Project

    - by Jason Fitzpatrick
    While this specific project is a really neat back-lit bookcase with customizable LED lights galore, you could easily add the exact same setup to just about anything you wanted to give some LED love. The core of the project is a set of addressable LED modules, an Arduino board, and a simple bit of code. You could use it to make a 70s style mood lighting box, add color changing accents to your media room, or any other number of fun projects just by cloning this project and extending/shortening the wires where appropriate. The control module allows for solid colors, multi-colors, and animations. Hit up the link below for more information including the source code. ExpeditInvaders [via IKEAHacker] HTG Explains: What The Windows Event Viewer Is and How You Can Use It HTG Explains: How Windows Uses The Task Scheduler for System Tasks HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows?

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  • What to do with my "unmounted drive"?

    - by Taylor Guistwite
    I just recently followed the tutorials on http://www.ubuntu.com/download/ubuntu/download for installing the ubuntu server onto my 1TB Seagate External. I was planning on using this to install it on my macbook and in these instructions it states to preform this line of code Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command; in the previous example, N would be 2) Now my HD prompts "The disk you inserted was not readable by this computer". Would I just run diskutil mountDisk /dev/diskN in order to be able to access all my files again? here is a screenshot to the instructions i followed http://i17.photobucket.com/albums/b97/hello_screamo/Screenshot2011-11-11at113914AM.png

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  • 3ds Max CAT to XNA

    - by user12214
    Has anyone successfully used the CAT bone system in 3ds Max and exported the file into XNA? If so, what was your method of doing so? There are a number of methods of doing this apparently, but the ones I've tried have not worked. I used the Panda Exporter which creates a .X file. This seems to be the latest way of going about this, but when it's loaded in XNA, there is an error saying something about the bone weights. This happens when I export with and without CAT bones.

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  • Parallel.For Inconsistency results

    - by ni Gue ???
    I am using VB.net to write a parallel based code. I use Parallel.For to generate pairs of 500 objects or in combination C(500,2) such as the following code; but I found that it didn't always generate all combinations which should be 124750 (shown from variable Counter). No other thread was runing when this code was run. I am using a Win-7 32 Bit desktop with Intel Core i5 CPU [email protected], 3.33 GHz and RAM 2GB. What's wrong with the code and how to solve this problem? Thank You. Dim Counter As Integer = 0 Parallel.For(0, 499, Sub(i) For j As Integer = i + 1 To 499 Counter += 1 Console.Write(i & ":" & j) Next End Sub) Console.Writeline("Iteration number: " & Counter)

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  • Geronimo 3 beta - Another Apache project now compatible with Java EE 6

    - by alexismp
    You probably recall the addition of TomEE and WebSphere CE at JavaOne 2011 to the list of certified Java EE 6 products. This time, Apache Geronimo 3 beta 1 was released with compatibility with the Java EE 6 full platform and is now listed on the Java EE Compatibility Page in both the Web Profile and Full Platform categories. Not surprisingly, a good number of the components used in this Geronimo release are similar to those used in the TomEE certification. We now have 11 compatible Java EE 6 configurations to chose from and expecting more soon.

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  • SQL Server Transaction Log Fragmentation: a Primer

    Generally, you will have no need to worry about the number of virtual log files in your transaction log. However, if you use the default settings for 'auto-grow', you can end up with such 'fragmentation' in your transaction log as to affect performance noticably. How can this be avoided? How can you tell it's a problem? What do you do about it? Greg explains. "SQL Backup Pro 7 improves on an already wonderful product" - Don KolendaHave you tried version 7 yet? Get faster, smaller, fully verified backups. Download a free trial of SQL Backup Pro 7.

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  • How do I disable the "enable/disable wireless" shortcut key on my laptop?

    - by Matthew
    On my Dell Studio XPS 16, I sometimes accidentally hit this key. Wireless becomes disabled, and hitting it again does not re-enable wireless. I have to hit it an odd number of times, then restart my computer to re-enable wireless. I can't imagine a situation in which I would want to disable wireless from my keyboard. Is it possible just disable the key all-together, so I can avoid this problem? On a related note, what package do I file the bug against? I'm happy just disabling the key, but that's really just a workaround.

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  • download file from web source, selectively

    - by KILL3RTACO
    If anyone has heard of Bukkit, you know that their files are usually of three types: Development, Beta, and Realease. Click (here) for examples. I need a script that: Loops through the directory Gets the latest Stable version (probably just as simple as looking at the version number as they have a simple naming convention, each stable version is succeeded by -Rx.0, while developmental and beta versions are succeeded by -Rx.x) After that I know I'll need to use wget to download the file. Note: If your just going to post code, at least tell me what it does so I can use it later if I need to

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  • Channelling an explosion along a narrow passage

    - by finnw
    I am simulating explosions in a 2D maze game. If an explosion occurs in an open area, it covers a circular region (this is the easy bit.) However if an explosion occurs in a narrow passage (i.e narrower than the blast range) then it should be "compressed", so that it goes further and also it should go around corners. Ultimately, unless it is completely boxed-in, then it should cover a constant number of pixels, spreading in whatever direction is necessary to reach this total area. I have tried using a shortest-path algorithm to pick the nearest N pixels to the origin avoiding walls, but the effect is exaggerated - the blast travels around corners too easily, making U-turns even when there is a clear path in another direction. I don't know whether this is realistic or not but it is counter-intuitive to players who assume that they can hide around a corner and the blast will take the path of least resistance in a different direction. Is there a well-known (and fast) algorithm for this?

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  • Website falsely blocked because of spam. Does anyone know how we should proceed?

    - by Thomas Crepain
    I'm responsible for ICT at FOS Open Scouting, a belgian scouting organisation. Our website was hacked a few years back and blocked by Facebook as a result. After we regained control over the site Facebook continued to block our domain and this is causing us a number of problems. We have tried many times in the past year to contact Facebook using their 'I am blocked from adding content' form (https://www.facebook.com/help/contact.php?show_form=block_appeal) to no avail. The blocked URLs are: http://www.fos.be and http://www.fosopenscouting.be Does anyone know how we should/could proceed?

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  • The JavaFX Community Site on Java.net

    - by Tori Wieldt
    Community activity surrounding JavaFX has been steadily growing, with tweets, blog posts, and projects increasing in number. We are pleased to announce that there is now a JavaFX community site on Java.net at the following URL: javafxcommunity.com  This site is an aggregator of JavaFX information, where you can find links to JavaFX blog posts, tweets, and other resources.  Gerrit Grunwald and Jim Weaver are the community leaders for this site, and they welcome your feedback on how to make the JavaFX Community site more useful to you! Learn more on Jim Weaver’s Rich-Client Java Blog. 

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  • Synergy - easy share of keyboard and mouse between multiple computers

    Did you ever have the urge to share one set of keyboard and mouse between multiple machines? If so, please read on... Using multiple machines Honestly, as a software craftsman it is my daily business to run multiple machines - either physical or virtual - to be able to solve my customers' requirements. Recent hardware equipment allows this very easily. For laptops it's a no-brainer to attach a second or even a third screen in order to extend your native display. This works quite handy and in my case I used to attached two additional screens - one via HD15 connector, the other via HDMI. But... as it's a laptop and therefore a mobile unit there are slight restrictions. Detaching and re-attaching all cables when changing locations is one of them but hardware limitations, too. After all, it's a laptop and not a workstation. I guess, that anyone working in IT (or ICT) has more than one machine at their workplace or their home office and at least I find it quite annoying to have multiple sets of keyboard and mouse conquering my remaining space on my desk. Despite the ugly looks of all those cables and whatsoever 'chaos of distraction' I prefer a more clean solution and working environment. This allows me to actually focus on my work and tasks to do rather than to worry about choosing the right combination of keyboard/mouse. My current workplace is a patch work of various pieces of hardware (approx. 2-3 years): DIY desktop on Ubuntu 12.04 64-bit, Core2 Duo (E7400, 2.8GHz), 4GB RAM, 2x 250GB HDD, nVidia GPU 512MB Dell Inspiron 1525 on Windows 8 64-bit, 4GB RAM, 200GB HDD HP Compaq 6720s on Windows Vista 32-bit, Core2 Duo (T5670, 1.8GHz), 2GB RAM, 160GB HDD Mac mini on Mac OS X 10.7, Core i5 (2.3 GHz), 2GB RAM, 500GB HDD I know... Not the latest and greatest but a decent combination to work with. New system(s) is/are already on the shopping list but I live in the 'wrong' country to buy computer hardware. So, the next trip abroad will provide me with some new stuff. Using multiple operating systems The list of hardware above already names different operating systems, and actually I have only one preference: Linux. But still my job as a software craftsman for Visual FoxPro and .NET development requires other OSes, too. Not a big deal, it's just like this. Additionally to those physical machines, there are a bunch of virtual machines around. Most of them running either Windows XP or Windows 7. Since years I have the practice that each development for one customer is isolated into its own virtual machine and environment. This keeps it clean and version-safe. But as you can easily imagine with that setup there are a couple of constraints referring to keyboard and mouse. Usually, those systems require their own pieces of hardware attached. As stated, I don't like clutter on my desk's surface, so a cross-platform solution has to come in here. In the past, I tried it with various applications, hardware or network protocols like X11, RDP, NX, TeamViewer, RAdmin, KVM switch, etc. but the problem in this case is that they either allow you to remotely connect to the other system or exclusively 'bind' your peripherals to the active system. Not optimal after all. Synergy to the rescue Quote from their website: "Synergy lets you easily share your mouse and keyboard between multiple computers on your desk, and it's Free and Open Source. Just move your mouse off the edge of one computer's screen on to another. You can even share all of your clipboards. All you need is a network connection. Synergy is cross-platform (works on Windows, Mac OS X and Linux)." Yep, that's it! All I need for my setup here... Actually, I couldn't believe it myself that I didn't stumble over synergy earlier but 'Get over it' and there we go. And despite the fact that it is Open Source, no, it's also for free. Donations for the developers are very welcome and recently they introduced Synergy Premium. A possibility to buy so-called premium votes that can be used to put more weight / importance on specific issues or bugs that you would like the developers to look into. Installation and configuration Simply download the installation packages for your systems of choice, run the installer and enter some minor information about your network setup. I chose my desktop machine for the role of the Synergy server and configured my screen setup as follows: The screen setup allows you currently to build or connect up to 15 machines. The number of screens can be higher as those machine might have multiple screens physically attached. Synergy takes this into the overall calculations and simply works as expected. I tried it for fun with a second monitor each connected to both laptops to have a total number of 6 active screens. No flaws after all - stunning! All the other machines are configured as clients like so: Side note: The screenshot was taken on Windows 8 and pasted via clipboard into Gimp running on Ubuntu. Resume Synergy is now definitely in my box of tools for my daily work, and amongst the first pieces of software I install after the operating system. It just simplifies my life and cleans my desk. Never again without Synergy!Now, only waiting for an Android version to integrate my Galaxy Tab 10.1, too. ;-) Please, check out that superb product and enjoy sharing one keyboard, one mouse and one clipboard between your various machines and operating systems.

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