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  • Take Camera Phone Macro Photos with a Cheap Laser Pointer Lens

    - by Jason Fitzpatrick
    Inside those cheap laser pointers you see in the grocery store checkout line there’s a handy little plastic lens that, when slapped on your phone’s camera, makes it easy to take macro photographs. In this tutorial, they take the lens from a laser point and secure it using tape and a bobby pin. An alternative method to achieve the same end (and with a higher quality lens) is to dismantle a CD/DVD drive to source the lens and use painter’s tape to hold the lens in place–this is the technique I used several years ago, check out the tutorial video here. Laser Pointer Macro Lens [via Apartment Therapy] How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using? HTG Explains: What The Windows Event Viewer Is and How You Can Use It

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  • how to avoid or minimise use of check/conditional statement?

    - by Muneeb Nasir
    I have scenario, where i got stream and i need to check for some value. if i got my any new value i have to store it in any of data structure. well it seems very easy, i can place conditional statement if-else or can use contain method of set/map to check either received is new or not. but the problem is checking will effect my application performance, in stream i'll receive hundreds for value in second, if i start checking each and every value i received than for sure it effect performance. Any body can suggest me any mechanism or algorithm that solve my issue. either by bypassing checks or atleast minimize them?

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  • Which database to use for quickly and pygtk

    - by usher
    I'm writing application using quickly Pygtk and glade. this application should have database connection (such as MySQL) for reading and writing data from the local or outsourcing machine \ server. However, in my machine there is MySQL installed, but when releasing the app it sould be installed on another ubuntu machine, which may not have mysql and moreover not the same database with the required database name and structure.... So my questions are: Is it a good choice using mysql as database 1.2 If not what is? Is it posible to embeding mysql or other database program during the installation from ubuntu software center? 2.2 If it's posible: hwo(any tutorial?) Where to store secure data outside the mysql (or whatever) for conecting the database every time a user launch the application

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  • What file formats and conventions should I support to make my game engine artist-friendly?

    - by Avi
    I'm writing a game engine, and I want to know what I should do to make it more artist-friendly. I don't want to be too limiting in terms of what file formats I support, etc. Some specific questions: Are there specific formats artists like to model in? Does it not matter because the 3D modeler abstracts the data storage away? Is it okay if I don't support per-vertex coloration in my game engine? If I have to store a diffuse, specular, ambient, and emissive color value for each vertex, it doubles the size of vertices in the buffer. Is it reasonable to ask artists to do all these things in textures / maps? Any other tips you have about making it so that artists have to adapt their style to my specific engine as little as possible would be nice.

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  • Should I create an Enum mapping to my database table

    - by CrazyHorse
    I have a database table containing a list of systems relevant to the tool I am building, mostly in-house applications, or third-party systems we receive data from. This table is added to infrequently, approx every 2 months. One of these systems is Windows itself, which is where we store our users' LANs, and I now need to explicitly reference the ID relating to Windows to query for user name, team etc. I know it would be bad practice to embed the ID itself into the code, so my question is what would be the best way to avoid this? I'm assuming my options are: create a global constant representing this ID create a global enum containing all systems now create a global enum and add systems to it as & when they are required in the code retrieve the ID from the database based on system name I appreciate this may seem a trivial question, but I am going to have many situations like this during the course of this build, and although we are in complete control of the database I would like to conform to best practice as far as possible. Many thanks!

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  • How Data Transfers differ on Smart Phones: Iphone vs. Android vs. Windows Phone

    - by MCH
    I am interested in how each individual smart phone is allowed to handle data transfers within a third-party app. I am interested in designing apps that allow customers to update, transfer, download, etc. data from their smart phone to their personal computer and vice-versa. (Ranging from just text, to XML, to a Relational Database) I only have experience with the Ipod Touch before and one particular app that maintained all the data on an online server, so to update the data on your pc or iphone you had to go online, are there other ways to do it? Like bluetooth, wireless LAN, USB, etc? I believe Apple has certain policies on this in order to control the App Store and individual Iphones. I suppose each company has a particular policy on how an app is allowed to transfer data to another system, does anyone have a good understanding of this? Thank you.

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  • U1 music shows unknown artist, how can I make it recognize m4a files?

    - by bisi
    Hello all, I am in the process of uploading my music library as a backup to U1, but I figured, why not also enjoy Ubuntu 1 music on my iPhone? With a few difficulties to start, the upload is now in progress, but I've noticed that there is a huge percentage of files in the unknown artist folder, and I believe it is all of my m4a files. They play fine, but without any information. Coming from an iTunes background, and having bought the majority of my music on the iTunes store, I wonder how I could make this work, easily? I am on Maverick (afaik), but About Ubuntu shows 11.04. I use Banshee as my music manager, and I monitor my sync using Ubuntu one preferences, ubuntuone-indicator and magicicada. The total file size of my music folder is 38.9GB. Thank you for your help!! And apologies if I couldn't find a thread where this was already covered...

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  • Why a write-enable ring?

    - by SpashHit
    Here's an "interview question" that while ostensibly about hardware really does inform a software design principal as well. Computers used to (still do I guess, somewhere) use magnetic tape reels to store data. There was a plastic accessory you could attach to a tape reel called a "write-enable ring". If the tape had such a ring, the tape drive allowed writing to the tape... if not, it only allowed read access. Why was the choice to design the system in this way? Why not have a "write protect ring" instead, with the opposite effect?

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  • DIY Touch Screen Mod Makes Regular Gloves Smartphone-friendly

    - by Jason Fitzpatrick
    Smartphone-friendly winter gloves are expensive (and often ugly). Skip shelling out for store-bought gloves when, armed with a needle and thread, you can turn any gloves into smartphone-friendly ones. Over at Popular Science, Taylor Kubota shares the simple trick: 1. Order silver-plated nylon thread (silver conducts electricity). This can be difficult to find in stores, but major online retailers carry it. 2. Pick a pair of gloves to modify. Although leather works, it’s harder to push a needle through. 3. Stitch the figure of a star or other solid shape onto the glove’s index finger with the thread, making sure it will contact both the touchscreen and your skin. Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus?

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  • Alternatives to sql like databases

    - by user613326
    Well i was wondering these days computers usually have 2GB or 4GB memory I like to use some secure client server model, and well an sql database is likely candidate. On the other hand i only have about 8000 records, who will not frequently be read or written in total they would consume less then 16 Megabyte. And it made me wonder what would be good secure options in a windows environment to store the data work with it multi-client single server model, without using SQL or mysql Would for well such a small amount of data maybe other ideas better ? Because i like to keep maintenance as simple as possible (no administrators would need to know sql maintenance, as they dont know databases in my target environment) Maybe storing in xml files or.. something else. Just wonder how others would go if ease of administration is the main goal. Oh and it should be secure to, the client server data must be a bit secure (maybe NTLM files shares https or...etc)

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  • Tell a user whether they have already viewed an item in a list. How?

    - by user2738308
    It is pretty common for a web application to display a list of items and for each item in the list to indicate to the current user whether they have already viewed the associated item. An approach that I have taken in the past is to store HasViewed objects that contain the Id of a viewed item and the Id of the User who has viewed that item. When it comes time to display a list of items this requires querying for the items, and separately querying for the HasViewed objects, and then combining the results into a set of objects constructed solely for the purpose of displaying them in the view. Each e.g li then uses the e.g. has_viewed property of the objects constructed above. I would like to know whether others take a different approach and can recommend alternative ways to achieve this functionality.

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  • XNA: Retrieve texture file name during runtime

    - by townsean
    I'm trying to retrieve the names of the texture files (or their locations) on a mesh. I realize that the texture file name information is not preserved when the model is loaded. I've been doing tons of searching and some experimenting but I've been met with no luck. I've gathered that I need to extended the content pipeline and store the file location in somewhere like ModelMeshPart.Tag. My problem is, even when I'm trying to make my own custom processor, I still can't figure out where the texture file name is. :( Any thoughts? Thanks! UPDATE: Okay, so I found something kind of promising. NodeContent.Identity.SourceFilename, only that returns the location of my .X model. When I go down the node tree he is always null. Then there's the ContentItem.Name property. It seems to have names of my mesh, but not my actual texture file names. :(

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  • Alternative Web model

    - by Above The Gods
    One of the problems web apps have against native apps, especially on the mobile front, is the constant need to re-download each web page on request. Ultimately, this leads to slower performance. Why if web apps only download new pages if they're actually needed, not because they're simply requested. For example: perhaps the server can store a web page version in a cookie. Every slight change to the page on the server-side changes the version number. Now instead of the browser requesting a new page each time, why not just check the version number and have the server send the page if they're different? If the page similar, the user can just use a cached page. I'm sure browsers doesn't necessarily have to change to accommodate changes to this, correct?

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  • forward rendering and multiple shadow maps

    - by Irbis
    I have two light sources on my scene. I created two fbo's which store depth textures for these lights. A render loop looks like this: bind fbo1 save depth values for first light unbind fbo1 bind fbo2 save depth values for second light unbind fbo2 enable additive blending bind first depth texture render scene bind second depth texture render scene disable additive blending For one light source the program works fine. For many light sources I use an additive blending to acumulate lighting results but then some objects become transparent (for example when an object which is further away from the camera is drawn before an object which is closer to the camera). How to resolve that problem ? How should I accumulate lighting effects for many light sources (many shadow maps) ? P.S. I use OpenGL/GLSL 3.3+

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  • Why do we use to talk about addresses and memory of variable in C?

    - by user2720323
    Why do we use to talk about addresses and memory of variable in C, where in other languages (like in Java, .Net etc) we do not talk about variable address and memory in a program, we will directly use the variables. But in C Language we are listening the word address and memory. How to explain this? I hope C is high level language designed over the assembly language. So C is a thin layer over assembly language (in assembly language we will use memory locations to store a variable and track a variable). But in other languages these addresses and memory related things are wrapped in that specific language, so that we will not listen these words.

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  • Magento not responding to payment gateway notifications fast enough or at all?

    - by robgt
    Some of our customers are getting to the confirmation of payment step in purchasing from our Magento store, and then they are getting a timeout error, where the SagePay payment gateway is trying to contact our server to tell it that a payment was successful (or not…) but it cannot contact our server, or cannot get a response from our server in a timely manner, and then the payment/order is being cancelled. I've raised this question to my hosting company, but all they told me was: "This is down to the way the software is configured on your server" This is currently a Magento 1.4.0.1 standard installation as far as payment gateways are concerned. What on earth could this statement mean? Is there some configuration that I need to do to make Magento listen to these requests and respond properly?

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  • How to solve this problem without the use of if-else statements?

    - by kira
    I have just started my C++ lecture class. And the teacher has given us the following assignment. Write a program that determines whether a number is even or odd. The logic I would use for the program is. Get input a. Store a % 2 as b. If b is 0, then b is even, else b is odd. The catch though, is that we have to write the program without the use of a if-else statement. I have been thinking on how to approach the problem for the past few hours, but I have no clue what to do. Any hints or suggestions?

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  • Les pré-commandes de l'iPad ouvertes en France, pour Apple 1 Euro = 1 $

    Mise à jour du 11.05.2010 par Katleen Les pré-commandes de l'iPad ouvertes en France, pour Apple 1 € = 1 $ Les pré-commandes d'iPad sont possible depuis quelques heures sur l'Apple Store français. Toute la gamme y est présente : la version simple, mais aussi celles incluant le wi-fi et la 3G, dans toutes les capacités de stockage, et livrables à la date du 28 mai. Du bonheur ? Presque, jusqu'à ce que l'on parle des tarifs. En effet, les prix européens sont sensiblement les mêmes que ceux affichés aux USA. Oui mais voilà, le dollar vaut beaucoup moins que l'euro. Autrement dit, le même appareil coutera plus cher à un français qu'à un américain. Un consommateur s'est ainsi plaint à ...

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  • Auto mount USB drive with permissions for all users

    - by oneaustin
    I have an Ubuntu 14.04 based Media Center and I store the media files on a USB HDD. I add files to drive directly on a Mac so I have it formatted as FAT32. The problem is that after reconnecting the drive to the Ubuntu, it mounts at /media/user/drivename and only the root user is allowed access. I need several applications to have full access to this drive. I can change file permissions in the terminal but it doesn't change because of the /media/user location. I am able to manually sudo mount /dev/sdc1 /media/drivename & sudo chmod 777 /media/drivename but the mount point changes each time. Is there a way to make this drive always mount where root and other applications have access?

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  • Skype arrive sur Windows Phone 8, Microsoft publie la Preview de son application de VoIP pour l'OS et une mise à jour pour iOS

    Skype arrive sur Windows Phone 8 Microsoft publie la Preview de son application de VoIP pour l'OS mobile et une mise à jour pour iOS Les utilisateurs de Windows Phone 8 peuvent déjà tester les fonctionnalités de la mise à jour de Skype pour l'OS. Microsoft vient d'annoncer la publication de la Preview de Skype pour Windows Phone 8. L'application plus épurée et moderne, est téléchargeable sur le store Windows Phone. Pour cette nouvelle mouture, Microsoft a accordé une attention particulière à une meilleure intégration avec l'interface utilisateur du système d'exploitation mobile et l'ajout de nouvelles fonctionnalités. Skype pour Windows Phone 8 apporte co...

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  • What is the future of XNA in Windows 8 or how will manged games be developed in Windows 8?

    - by Ken
    I know this is a potential dupe of this question, but the last answer there was 18 months ago and a lot has happened since. There seems to be some uncertainty about XNA in Windows 8. Specifically, Windows 8 by default uses the Metro interface, which is not supported by XNA. Also the Windows 8 store will not stock non-metro apps, so it will not stock XNA apps. Should we stick with XNA or does Microsoft want us to move to a different framework for managed game development in Windows 8? Edit: As pointed out in one of the comments, Windows 8 will be able to run XNA games in a backward compatibility mode. But that smells of deprecation.

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  • L'iPad disponible dans 9 pays dont la France le 28 mai mais pas avant juillet pour d'autres, dont la

    Aujourd'hui, Apple a confirmé, malgré le fait qu'il semble bien que l'iPad soit difficilement trouvable aux Etats-Unis, que l'iPad sera disponible dès le 28 mai dans 9 autres pays, dont France, le Canada et la Suisse. (mais aussi l'Australie, l'Allemagne, l'Italie, l'Espagne, le Royaume-Unis et le Japon). Les prix seront dévoilé ce lundi 10 mai sur l'Apple Store, où il sera également possible de les pré-commander. Dans cette même annonce, Apple annonce que l'iPad sera également lancé dans 9 autres pays, dont la Belgique. Mais ceux-ci devront patienter jusqu'au mois de Juillet pour cela. Source : http://www.apple.com/pr/library/2010/05/07ipad.html...

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  • Data-driven animations

    - by saadtaame
    Say you are using C/SDL for a 2D game project. It's often the case that people use a structure to represent a frame in an animation. The struct consists of an image and how much time the frame is supposed to be visible. Is this data sufficient to represent somewhat complex animation? Is it a good idea to separate animation management code and animation data? Can somebody provide a link to animations tutorials that store animations in a file and retrieve them when needed. I read this in a book (AI game programming wisdom) but would like to see a real implementation.

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  • Should Git be used for documentation and project management? Should the code be in a separate repository?

    - by EmpireJones
    I'm starting up a Git repository for a group project. Does it make sense to store documents in the same Git repository as code - it seems like this conflicts with the nature of the git revision flow. Here is a summary of my question(s): Is the Git revisioning style going to be confusing if both code and documents are checked into the same repository? Experiences with this? Is Git a good fit for documentation revision control? I am NOT asking if a Revision Control System in general should or shouldn't be used for documentation - it should. Thanks for the feedback so far!

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  • Help with a CMS for content only not display

    - by user2091756
    Hello I'm trying to make some kind of tool for an school website, what I need to do is to make students take a test and according to what are the results (27 posibilities) they get a set of activities (questions) according to their level which they can solve in around 3 months logging periodically to the website, plus I need teachers to log and look at the reports. Now, I'm a graphic designer myself so my skills are mostly html5 and css3 and I know some php (edit existing ones only) and javascript (jquery) as well, most people tell me that I need a CMS to do the tool but all I find is CMS for display like blogs or news websites which I think aren't useful for me because the website is already made in html and css3 only (I need to add an extra page for the tool) I understand I need to create users and give them special rights according to what type of user they are and I also understand that I need a database where I can store all my questions. What is the best way to do this? what do you suggest me? Thanks

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