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• How does one handle an incorrect resource file?

  - by AedonEtLIRA

  I'm starting the parser that will handle one of the key features of my app and realizing exactly who easy it would be for me to screw up a resource file that is provided to the application. For example, a simple resource that I provide to my app is a JSON file that contains an entity layout (name, fascia, location etc...). It would be easy for me to leave out the name of the entity or misspell the JSON key. Obviously catastrophic failures during parsing are to be handled in a try/catch, but how would subtle failures (such as a dyslexic spelling of name) be handled?

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• Print Your Favorite Video Game Character in 3D

  - by Jason Fitzpatrick

  Beloved video game characters of yesterday are perfect candidates for 3D printing with their simple and block-based sprite shapes. Read on to learn more about the process and mathematics of turning 2D sprites into 3D models. Courtesy of Mikola Lysenko, a computer scientist and mechanical engineer, we’re treated to not just a tutorial on how to create a 3D shape from a 2D seed image, but the mathematics behind figuring out exactly what that 2D sprite should look like if stretched out into three dimensions. Hit up the link below for his tour of techniques including multiview stereo reconstruction and space carving (and why he went with one technique over the other)–the explanation of his process is just as interesting as the cool results it yields. Turning 8-Bit Sprites into Printable 3D Models [via Hack A Day] How To Create a Customized Windows 7 Installation Disc With Integrated Updates How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using?

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• How to have a maintainable and manageable Javascript code base

  - by dade

  I am starting a new job soon as a frontend developer. The App I would be working on is 100% Javascript on the client side. all the server returns is an index page that loads all the Javascript files needed by the app. Now here is the problem: The whole of the application is built around having functions wrapped to different namespaces. And from what I see, a simple function like rendering the HTML of a page can be accomplished by having a call to 2 or more functions across different namespace... My initial thought was "this does not feel like the perfect solution" and I can just envisage a lot of issues with maintaining the code and extending it down the line. Now I would soon start working on taking the project forward and would like to have suggestions on good case practices when it comes to writing and managing a relatively large amount of javascript code.

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• Zune API Library for Python

  - by kerry

  I am about to start working on a Python project for work. So I thought it was probably time to learn Python! This weekend I took on this task. I decided to rewrite a library I wrote in PHP to access Zune user data. I got it finished and decided to put it on github. Usage is simple: zuneCard = ZuneCard('ZuneTagHere') You can access things like user information, favorites, recent plays, and most played. The properties are documented (pydoc, under /docs). So for the 1 other person that may use this, you’re welcome!

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• Should I always be checking every neighbor when building voxel meshes?

  - by Raven Dreamer

  I've been playing around with Unity3d, seeing if I can make a voxel-based engine out of it (a la Castle Story, or Minecraft). I've dynamically built a mesh from a volume of cubes, and now I'm looking into reducing the number of vertices built into each mesh, as right now, I'm "rendering" vertices and triangles for cubes that are fully hidden within the larger voxel volume. The simple solution is to check each of the 6 directions for each cube, and only add the face to the mesh if the neighboring voxel in that direction is "empty". Parsing a voxel volume is BigO(N^3), and checking the 6 neighbors keeps it BigO(7*N^3)-BigO(N^3). The one thing this results in is a lot of redundant calls, as the same voxel will be polled up to 7 times, just to build the mesh. My question, then, is: Is there a way to parse a cubic volume (and find which faces have neighbors) with fewer redundant calls? And perhaps more importantly, does it matter (as BigO complexity is the same in both cases)?

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• Utility Objects Series Introduction (but mostly a bit of an update)

  - by drsql

  So, I have been away from blogging about technical stuff for a  long time,  (I haven’t blogged at all since my resolutions blog , and even my Simple Talk “commentary” blog hasn’t had an entry since December!)  Most of this has been due to finishing up my database design book , which I will blog about at least one more time after it ships next month, but now it is time to get back to it certainly in a bit more regularly. For SQL Rally, I have two sessions, a precon on Database Design,...(read more)

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• OOD: All classes at bottom of hierarchy contain the same field

  - by My Head Hurts

  I am creating a class diagram for what I thought was a fairly simple problem. However, when I get to the bottom of the hierarchy, all of the classes only contain one field and it is the same one. This to me looks very wrong, but this field does not belong in any of the parent classes. I was wondering if there are any suggested design patterns in a situation like this? A simplified version of the class diagram can be found below. Note, fields named differently cannot belong to any other class +------------------+ | ObjectA | |------------------| | String one | | String two | | | +---------+--------+ | +---------------+----------------+ | | +--------|--------+ +--------|--------+ | ObjectAA | | ObjectAB | |-----------------| |-----------------| | String three | | String four | | | | | +--------+--------+ +--------+--------+ | | | | +--------|--------+ +--------|--------+ | ObjectAAA | | ObjectABA | |-----------------| |-----------------| | String five | | String five | | | | | +-----------------+ +-----------------+ ASCII tables drawn using http://www.asciiflow.com/

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• Timing Calculations for Opengl ES 2.0 draw calls

  - by Arun AC

  I am drawing a cube in OpenGL ES 2.0 in Linux. I am calculating the time taken for each frame using below function #define NANO 1000000000 #define NANO_TO_MICRO(x) ((x)/1000) uint64_t getTick() { struct timespec stCT; clock_gettime(CLOCK_MONOTONIC, &stCT); uint64_t iCurrTimeNano = (1000000000 * stCT.tv_sec + stCT.tv_nsec); // in Nano Secs uint64_t iCurrTimeMicro = NANO_TO_MICRO(iCurrTimeNano); // in Micro Secs return iCurrTimeMicro; } I am running my code for 100 frames with simple x-axis rotation. I am getting around 200 to 220 microsecs per frame. that means am i getting around (1/220microsec = 4545) FPS Is my GPU is that fast? I strongly doubt this result. what went wrong in the code? Regards, Arun AC

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• How to remove all LVs VGs and Partitions On All Drives Before Installing 12.04

  - by Mark

  I have 2 hard drives that had been used for Ubuntu Server 11.10. Now I would like to start from scratch with 12.04 but I'm having some trouble with the existing logical volumes and volume groups. Erasing data during install looks like it's going to take days. Is there a quick and simple way to wipe out all volumes/groups/partitions so I can start with 2 empty drives? When I set this up on 11.04 it took me a while to learn how to do it and I've since forgotten most of what I learned. For what it's worth, I'm only using this box to try and learn about Linux. Thanks in advance, Mark

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• How To Get SSH Command-Line Access to Windows 7 Using Cygwin

  - by YatriTrivedi

  Are you comfortable with Linux/Unix and want SSH access to your Windows 7 machine? Cygwin provides this functionality and gives you a familiar environment to work with in a few simple steps. We’re assuming you’ve got Cygwin installed and configured. If not, check out our article, How To Use Linux Commands in Windows with Cygwin to get started Latest Features How-To Geek ETC How To Create Your Own Custom ASCII Art from Any Image How To Process Camera Raw Without Paying for Adobe Photoshop How Do You Block Annoying Text Message (SMS) Spam? How to Use and Master the Notoriously Difficult Pen Tool in Photoshop HTG Explains: What Are the Differences Between All Those Audio Formats? How To Use Layer Masks and Vector Masks to Remove Complex Backgrounds in Photoshop Bring Summer Back to Your Desktop with the LandscapeTheme for Chrome and Iron The Prospector – Home Dash Extension Creates a Whole New Browsing Experience in Firefox KinEmote Links Kinect to Windows Why Nobody Reads Web Site Privacy Policies [Infographic] Asian Temple in the Snow Wallpaper 10 Weird Gaming Records from the Guinness Book

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• Returning JsonResult From ASP.NET MVC 2.0 Controller and Unit Testing

  This post will show how to return a simple Json result from an ASP.NET MVC 2.0 web project.  It will show how to test that result inside a unit test and essentially pick apart the Json, just... This site is a resource for asp.net web programming. It has examples by Peter Kellner of techniques for high performance programming...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How can I factor momentum into my space sim?

  - by Josh Petite

  I am trying my hand at creating a simple 2d physics engine right now, and I'm running into some problems figuring out how to incorporate momentum into movement of a spaceship. If I am moving in a given direction at a certain velocity, I am able to currently update the position of my ship easily (Position += Direction * Velocity). However, if the ship rotates at all, and I recalculate the direction (based on the new angle the ship is facing), and accelerate in that direction, how can I take momentum into account to alter the "line" that the ship travels? Currently the ship changes direction instantaneously and continues at its current velocity in that new direction when I press the thrust button. I want it to be a more gradual turning motion so as to give the impression that the ship itself has some mass. If there is already a nice post on this topic I apologize, but nothing came up in my searches. Let me know if any more information is needed, but I'm hoping someone can easily tell me how I can throw mass * velocity into my game loop update.

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• What is the advantage of a programmers VM apart from portability

  - by user619818

  I can understand the benefits of Java running on a JVM. Portability. Nice simple reason. But I have always been puzzled as to why Microsoft brought out their own version of a JVM - .NET. C# is supposed to be a fine language (haven't used myself) but could Microsoft have launched product to use native. ie to generate an exe? My colleague is learning F#. The reason it has to be a language which runs on .NET is because the Microsoft Lync API which will be used is only available on .NET. ie there is no C API for Lync. A cynical view may be that the reason is vendor lockin. F# will only run on a Microsoft platform (or C# for that matter) and so program is locked in. But maybe I am missing some other benefit of a VM platform?

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• Debian Stable vs Ubuntu LTS for Server?

  - by Kevin

  Quick question: Which is a better platform for a professional use server? Debian Stable or Ubuntu LTS? The third party software we plan to use, works on both. Which one is better on it own merits? Take into account things like the kernel (Ubuntu for example has its own custom kernel for servers), and other Ubuntu specific customizations. I keep switching back and forth, and I need to decide so I can recommend one or the other to a client. Right now, I think I am going to choose Debian Stable. Recently, I have had Ubuntu Server Edition 10.04.1 have a few strange issues... I have Ubuntu setup to do automatic updates via a simple script, and every few months or so, libapache2-mod-php5 gets removed because of conflicting packages... Thereby causing me to loose the php function of the web server. Debian Stable has not done anything like this.

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• Stupid Geek Tricks: Disable Windows 7 Aero Peek in Two Clicks

  - by The Geek

  Most of you probably already know how to do this, but earlier today I was showing somebody how to turn Aero Peek off, and they were surprised at just how simple it is—you only have to use two mouse clicks to disable it. This method only disables the setting in the lower-right. If you’d like to disable the taskbar thumbnail version of Aero Peek, you’ll need to read our article on the subject. Or if you’d like to disable the delay, you can do that too.What is a Histogram, and How Can I Use it to Improve My Photos?How To Easily Access Your Home Network From Anywhere With DDNSHow To Recover After Your Email Password Is Compromised

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• What is the best Video Conference integrated solution for Us? [closed]

  - by Andrei B

  we are trying to integrate a simple Video Conferencing (open source) solution into our existing application which is written in C++ and it runs on Linux. I am currently looking at using Ekiga (formely known as GnomeMeeting) or Homer Conferencing (short: Homer). My plan is to "integrate" an existing Video Conferencing client into our existing software. Please give me recommendation on which 3rd party application or library to use to add video conferencing feature to our application. PS: Please don't close this question. I asked it on StackOverflow and it got closed, so where am I supposed to ask this question? If not here, then whats the point of asking lol.

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• Best design for a memory resident tool

  - by Andrew S.

  I apologize if this tends more toward design that programming, but here goes. What design would you recommend for a database that is Memory resident Must run on windows, linux and (at a stretch) the mac Accept multiple queries simultaneously Have minimum overhead, since a search is expected to take <0.25s This program implements a domain-specific search. Think of it as a database, but one that takes advantage of domain specific information to outperform a convential database search (for example, with custom oracle indexing). We have a custom data structure for our data. Our protoype is a simple exe that constructs the database in memory each time it is run. We were thinking that perhaps this program would suffice, but augmented with sockets so it can listen for queries. This database will be static. Its contents will change infrequently. We expect queries, and the solution, to be delivered via a web service.

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• Career in Game Development

  - by cantbereached

  Hello, I currently study computer engineering and I want to lead my career towards game industry which I always want to be a part of. But I am not sure where to start. I applied some of the companies in the industry for internship and so but most of them wants experience and some work in game developing. Many asks whether I developed a simple game or something similar which I haven't done so far. I am proficient at C, C++, Java, JS, HTML etc. Any tips from people experienced in the industry on where to start ?

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• Consuming JSON stream into AWS Database on the cheap

  - by wjl

  I'm working on a project that needs to consume a JSON stream (approximately 1MB / minute), and parse and insert objects into a database. Amazon's DynamoDB or SimpleDB seem like attractive options for this. Is there a web service that can run a very simple script to eat the data and put it in a database? I could use a worker on Heroku or Elastic Beanstalk, or even pure EC2, but I'd like to find a service that's much cheaper, due to the very low amount of bandwidth and CPU required. (Sorry for the crappy tags. I'm not even sure where to categorize this question.)

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• Procedural Mesh: UV mapping

  - by Esa

  I made a procedural mesh and now I want to apply a texture to it. The problem is, I cannot get it to stick the way I want it to. The idea is to have the texture painted only once over the whole mesh, so that there is no repeating. How should I map the UV to make that happen? My mesh is a simple plane consisting of 56 triangles. I'd add pictures to clear things up but I cannot since my reputation is below 10 points. Any help is appreciated. EDIT(Kind people gave me up votes, thank you): Meet my mesh: And when textured(tried to repeat the texture): And my texture:

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• How do i fight spam against my mail servers ?

  - by tawfekov

  Hello , the problem I am having is the ability to fight spammers who add unsubscribe form this mail list by clicking here into their spam emails , turns out i am not the only suffer form this , gmail don't filter these mail as well . i made a simple test case , created an email on gmail and contacted one the spammer asking him to add my address to his list such a bad idea :P and google thought that i am already subscribed to that list and put it in my inbox . these kind of spammer uses many accounts to send their spam which make this job much harder how do i report those spammer , and block them in gmail or mail mail servers ?? what is the fastest way to do that ???

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• Handling Players, enemies and attacks in HTML5

  - by Chris Morris

  I'm building a simple (currently) game with free roaming player and monsters on a map built by a 2D grid. I've been looking at the methods for implementing characters and enemies onto the screen and I've seen two seperate methods for doing this online. Drawing the player onto the screen canvas directly and refreshing the entire screen every FPS tick. Having a separate canvas to handle the player and moving the player canvas on top of the screen canvas via absolute positioning. I can see some pros and cons of both methods but what is generally the best method for doing this? I assume the second due to not having to drain resources by refreshing the map when the user is not moving, but the type of game will generally have constant movement.

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• Is there a phrase or word to describe an algorithim or programme is complete in that given any value for its arguments there is a predictable outcome?

  - by Mrk Mnl

  Is there a phrase to describe an algorithim or programme is complete in that given any possible value for its arguments there is a predicatable outcome? i.e. all the ramifications have been considered whatever the context? A simple example would be the below function: function returns string get_item_type(int type_no) { if(type_no < 10) return "hockey stick" else if (type_no < 20) return "bulldozer" else return "unknown" } (excuse the dismal pseudo code) No matter what number is supplied all possibiblites are catered for. My question is: is there a word to fill the blank here: "get_item_type() is ______ complete" ? (The answer is not Turing Complete - that is something quite different - but I annoyingly always think of something as "Turing Complete" when I am thinking of the above).

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• SilverlightShow for 06-12 Dec 2010

  - by Dave Campbell

  In an effort to get some synergy in the Silverlight community, the SilverlightShow folks and I have decided to share some information. As always, I'm running a bit behind, so I get to post first with the material they provided to me :) Check out the five most popular news at SilverlightShow for last week (06 - 12 Dec 2010). The news that hit the top is the announcement for the upcoming SilverlightShow webinar with Gill Cleeren [which I posted about a couple weeks ago] (check other webinars Gill delivered for SilverlightShow) and the free Telerik license given away to attendees. Michael Crump's digest of Silverlight 5 news announced at Firestarter was the next most attention-grabbing news. Here is SilverlightShow's weekly top 5: Join our next webinar and win a license for Telerik RadControls for Silverlight Silverlight 5 - What's New (Including Screenshots & Code Snippets) Glossy TextBlock Custom Control For Windows Phone WP7 development vs iOS, Android and mobile Web Silverlight Simple Drag And Drop / Or Browse View Model / MVVM File Upload Control Visit and bookmark SilverlightShow... they've got a lot of good things happening over there. Stay in the 'Light

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• Animation file format

  - by Paul

  I'm trying to make a simple 2D animation file format. It'll be very rudimentary: only an XML file containing some parameters (such as frame duration) and metadata, and some images, each representing a frame. I'd like to have the whole animation (frames and XML document) packed in a single file. How do you suggest I do that? What libraries are there that would allow easy access to the files inside the animation file itself? The language I'm using is C++ and the platform is Windows, but I'd rather not use a platform dependent library, if possible.

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