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• What are my tool options to prototype a 2D online multiplayer game?

  - by Asher Einhorn

  I'm looking for the best tool to allow me to quickly put together a 2D game that relies largely on networking. It's extremely likely that this game will require a server side program to constantly run. I have little experience with these things and since it's a prototype i'd like the easiest options for achieving this. I am looking to make this game for the web and mobile devices, although at present I only have access to ios hardware, (no android etc). I just want to get the bare bones of this set up so I can test it from the earliest opportunity to see if it's fun. EDIT - doesn't unity have some inbuilt networking stuff in it?

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• My ASUS U32U with fresh Xubuntu install shows a black screen 50-80% of the startups

  - by Jona Ekenberg

  I have recently installed Ubuntu 12.10 with Xubuntu-package on my ASUS U32U notebook (Radeon HD 6320 GPU). The issue I have is that more often than not, after the GRUB-select screen I get a black screen, and three times total white lines (kind of) flashes very quickly (with maybe 5 seconds between each flash). I'm not even able to get to the login-screen (nor the Xubuntu loading screen). At first I thought it was simply me having installed something dumb or messed up some settings, but even after reformatting the partition and installing ubuntu again, the problem remains. Before I formatted it xfce4's window manager wouldn't start either, but it does now (when I am able to see anything). I can access the virual consoles (ctrl+alt+f1), but I can't see anything, but I've managed to shutdown the computer by using it (sudo shutdown -h now).

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• Inspecting the model in a Rails application

  - by Matt Sherman

  I am learning some Ruby on Rails, and am a newbie. Most of my background is in ASP.net MVC on the back end. As I play with a basic scaffold project, I wonder about this case: you jump into an established Rails project and want to get to know the model. Based on what I have seen so far (again, simple scaffold), the properties for a given class are not immediately revealed. I don't see property accessors on the model classes. I do understand that this is because of the dynamic nature of Ruby and such things are not necessary or even perhaps desirable. Convention over code, I get that. (Am familiar with dynamic concepts, mostly via JS.) But if I am somewhere off in a view, and want to quickly know whether the (eg) Person object has a MiddleName property, how would I find that out? I don't have to go into the migrations, do I?

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• choppy sound with random popping 13.04

  - by Goddard

  I was hoping some one could help me figure out why my audio is popping randomly. I just got some new speakers and it was popping previously, but I was using monitor speakers so it wasn't really noticeable. Now I have some Bose speakers hooked up via an analog cable. It is not the speakers because my Android phone plays audio fine. When I open the sound settings window the popping happens at exactly the same time a third sound device is displayed very quickly and then disappears. This keeps happening at about 30 second intervals. Any help is appreciate. If you need more details just let me know how to get them.

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• Cannot see shared folder in /mnt/hgfs

  - by blasto

  I am trying to share a folder between Lubuntu 13.04 (in VMware player) and Windows 7 64 bit. I followed a tutorial till step 16. I typed a command and saw nothing. I also went into the /mnt/hgfs folder and saw nothing there. How do I fix this ? http://theholmesoffice.com/how-to-share-folders-between-windows-and-ubuntu-using-vmware-player/ Command - dir /mnt/hgfs EXTRAS - By the way, this is how I actually reached step 16. Step 12 - sudo apt-get install hgfsclient Step 14 - If it does not work, then follow this tutorial - http://www.liberiangeek.net/2013/03/how-to-quickly-install-vmware-tools-in-ubuntu-13-04-raring-ringtail/ Step 16 - STUCK !!!

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• Lenovo Y460 heats up with Ubuntu 11.10

  - by user54480

  I'm new with Ubuntu and I'm enjoying my experience with Ubuntu 11.10 on my Lenovo ideapad Y460. I'm dual booting Ubuntu with Windows 7 64 bit. It's great using Ubuntu, however I noticed that my laptop heats up rather quickly when I use Ubuntu. Does this have to do with drivers? I have Nvidia GT 425M graphics, but I don't know if this information is relevant. My fans are just not working right as they do in Windows 7. Did I miss installing something or what am I doing wrong?

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• Skills for RAD developer.

  - by Janis Peisenieks

  I am about to embark on an exquisite journey. I have applied for an event, where in span of 48 straight hours, strangers meet, throw around some great ideas, decide on teams, and make a working prototype of IT project. All within 48 hours. I anticipate, that this will be very skill and ability intensive experience, and I want to be prepared. Since i will need to develop my part of the code quickly, I have a following question: What would be the most needed skills for these 48 hours? I do know, that things like proper documentation, version control and such are pretty important for a full fledged application/program/web development, but for this span of frantic coding? Background: I am a web developer, so answers applicable to web development would be more appreciated than others.

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• Windows Phone 7 Design Template

  Windows Phone 7 Design Template Expression Blend is a wonderful design environment for WP7 (Windows Phone 7) but for quickly visualizing a concept nothing beats Illustrator! I am excited about WP7 and decided that having a solid .ai template would prove invaluable. Some of the details of the WP7 UI Design and Interaction Guide are a bit fuzzy (literally) but I was able to generate some useful layout guides, character styles, and symbols. While the template does not cover every aspect of the guide I think it is a good launching point; if you find it useful and extend it please share your updates (I created the template in CS4, if you have problems in earlier versions let me know).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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• Is type safety worth the trade-offs?

  - by Prof Plum

  I began coding in in Python primarily where there is no type safety, then moved to C# and Java where there is. I found that I could work a bit more quickly and with less headaches in Python, but then again, my C# and Java apps are at much higher level of complexity so I have never given Python a true stress test I suppose. The Java and C# camps make it sound like without the type safety in place, most people would be running into all sorts of horrible bugs left an right and it would be more trouble than its worth. This is not a language comparison, so please do not address issues like compiled vs interpreted. Is type safety worth the hit to speed of development and flexibilty? WHY? to the people who wanted an example of the opinion that dynamic typing is faster: "Use a dynamically typed language during development. It gives you faster feedback, turn-around time, and development speed." - http://blog.jayway.com/2010/04/14/static-typing-is-the-root-of-all-evil/

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• Texture artifacts on iPad

  - by MrDatabase

  I'm porting an iPhone game to the iPad. When I move textures "quickly" (5.0 pixels every update at a rate of 60 Hz) I start to see little "artifacts" or remnants of where the texture used to be. I'm not sure if I know the correct terminology for this... imagine a texture at some location on the screen... then next to it is the same texture but faded a bit... then the same texture again just faded a bit more. I'm using CADisplayLink to drive my update loop if that helps. Also I didn't see this issue on the 3G or the iPhone 4. Any ideas? Cheers!

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• SQL vs. Oracle Live Debate (AKA Smackdown!)

  - by Peter W. DeBetta

  A few years ago I was speaking at a conference in Raleigh, NC where Ted Neward and I found a fun way to promote a Java vs. .NET debate that was planned one evening. We stood in the middle of a crowd during one of the breaks and starting “arguing” about Java vs. .NET with one another. Our voice levels quickly raised and we ended it by slapping each other across the face with a glove to request a challenge. It was a great way to segue to our announcing of the actual debate planned later that evening....(read more)

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• Almost Realtime Data and Web application

  - by Chris G.

  I have a computer that is recording 100 different data points into an OPC server. I've written a simple OPC client that can read all of this data. I have a front-end website on a different network that I would like to consume this data. I could easily set the OPC client to send the data to a SQL server and the website could read from it, but that would be a lot of writes. If I wanted the data to be updated every 10 seconds I'd be writing to the database every 10 seconds. (I could probably just serialize the 100 points to get 1 write / 10 seconds but that would also limit my ability to search the data later). This solution wouldn't scale very well. If I had 100 of these computers the situation would quickly grow out of hand. Obviously I am well out of my league here and I have no experience with working with a large amount of data like this. What are my options and what should I research?

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• Oracle Process Accelerators Release 11.1.1.7.0 Now Available

  - by Cesare Rotundo

  The new Oracle Process Accelerators (PA) Release (11.1.1.7.0) delivers key functionality in many dimensions: new PAs across industries, new functionality in preexisting PAs, and an improved installation process. All PAs in Release 11.1.1.7.0 run on the latest Oracle BPM Suite and SOA Suite, 11.1.1.7. New PAs include: Financial Reports Approval (FRA): end-to-end solution for efficient and controlled Financial Report review and approval process, enabling financial analysts and decision makers to collaborate around Excel. Electronic Forms Management (EFM): supports the process to design and expose eForms with the ability to quickly design eForms and associate approval processes to them, and to then enable users to select, fill, and submit eForms for approval Mobile Data Offloading (MDO): enables telecommunications providers to reduce congestion on cellular networks and lower cost of operations by using Oracle Event Processing (OEP) and BAM to switch devices from cellular networks to Wi-Fi. By adopting the latest PA release , customers will also be able to better identify and kick-start smart extension of their processes where business steps are supported by Apps: PA 11.1.1.7.0 includes out-of-the-box business process extension scenarios with Oracle Apps such as Siebel (FSLO) and PeopleSoft (EOB).

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• Retail Link data storage requirements

  - by Randy Walker

  I was asked today about how much data an average Retail Link analyst (Walmart vendor) would consume.  I thought I would write this small post for future reference. Of course this vastly depends on the amount of skus, how long you want to archive data, and if you want store level sales. Most reports take up very little space. Most times when you download a report (total sales per sku for last week), you will overwrite the previous week’s report.  However, most users will take the data inside their downloaded report, and add it to a database or larger excel spreadsheet.  This way, the user has a history of the sales of each item/sku per week over the last 2+ years.  I would estimate 1 user to consume around 1-2 gb of space, at most, over the course of 2 years. If you start archiving store level sales those numbers can drastically increase up to 10gb or more very quickly.

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• HTG Explains: Should You Shut Down, Sleep, or Hibernate Your Laptop?

  - by Chris Hoffman

  Computers can sleep, hibernate, or shut down. Sleep allows you to quickly resume using your laptop at the cost of some electricity. Hibernate is like shutting down your computer, but you can still resume working where you left off. There’s no right answer in all situations. Some people leave their computers running 24/7, while others shut down computers the moment they step away. Each of these options has its advantages and disadvantages. Image Credit: DeclanTM on Flickr 6 Ways Windows 8 Is More Secure Than Windows 7 HTG Explains: Why It’s Good That Your Computer’s RAM Is Full 10 Awesome Improvements For Desktop Users in Windows 8

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• Automatically kill a process if it exceeds a given amount of RAM

  - by chrisamiller

  I work on large-scale datasets. When testing new software, a script will sometimes sneak up on me, quickly grab all available RAM, and render my desktop unusable. I'd like a way to set a RAM limit for a process so that if it exceeds that amount, it will be killed automatically. A language-specific solution probably won't work, as I use all sorts of different tools (R, Perl, Python, Bash, etc). So is there some sort of process-monitor that will let me set a threshold amount of RAM and automatically kill a process if it uses more?

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• How do you avoid working on the wrong branch?

  - by henginy

  Being careful is usually enough to prevent problems, but sometimes I need to double check the branch I'm working on (e.g. "hmm... I'm in the dev branch, right?") by checking the source control path of a random file. In looking for an easier way, I thought of naming the solution files accordingly (e.g. MySolution_Dev.sln) but with different file names in each branch, I can't merge the solution files. It's not that big of a deal but are there any methods or "small tricks" you use to quickly ensure you're in the correct branch? I'm using Visual Studio 2010 with TFS 2008.

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• Help building pygtk application

  - by umpirsky

  This is my application. It is created with quickly. I would like to package it for Ubuntu now. I tried to package it with uickly, but that failed. At first, I was trying to install it using setup.py. But it is only copied in python lib dir, no icon, no desktop file installed. Then I tried to follow this guide, but I ended up with package without icon and it was of bad quality, but most important of all, it does not use setup.py, and it was pretty complicated. I would like to automate packaging process Can someone point me in the right direction, some examples of existing apps that have automated packaging etc? Thanks in advance.

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• Which game logic should run when doing prediction for PNP state updates

  - by spaceOwl

  We are writing a multiplayer game, where each game client (player) is responsible for sending state updates regarding its "owned" objects to other players. Each message that arrives to other (remote) clients is processed as such: Figure out when the message was sent. Create a diff between NOW and that time. Run game specific logic to bring the received state to "current" time. I am wondering which sort of logic should execute as part of step #3 ? Our game is composed of a physical update (position, speed, acceleration, etc) and many other components that can update an object's state and occur regularly (locally). There's a trade off here - Getting the new state quickly or remaining "faithful" to the true state representation and executing the whole thing to predict the "true" state when receiving state updates from remote clients. Which one is recommended to be used? and why?

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• Installing Oracle 11g SOA Suite?

  - by asantaga

  Are you working for an SI like Accenture or Cap Gemini? Are you a sales consultant who needs to install software quickly??? Well I’m sure if your reading this you probably are.. Anyway if your like me, and like many tecchies reading manuals isn't natural to us, we’ll download the software, try to install it and then… ultimately fail.. or take a lot longer than it should..  However never fear help is here! For Oracle 11g SOA Suite (ps3) a good friend of mine , a SOA 11g PM in the states, has written a document, a quick start and its on OTN.. Although the document is PS3 focused, apart from the download URLs its also totally applicable for PS4 too. The document can be found at this link

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• How to control / disable low level battery on bluetooth mouse

  - by Alberto

  I have a little problem with my Kesington Bluetooth Mouse on Ubuntu 12.10. Ubuntu 12.10 considers my bluetooth mouse battery as a system battery as if it was the main laptop battery (so I have two on the battery indicator, the main and the bluetooth one). When it runs low level, near to die, battery, my laptop acts as if it was the main battery and I must quickly stop bluetooth and continue on the touchpad if I want to work. Can anyone help me? Maybe I prefer to disable the battery control over the mouse, I don't care about it, I know it is fully charged, but Ubuntu always starts on 33% or less, I just want to work with it and when it will be battery-off I will recharge the batteries. Many thanks in advance. Alberto.

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• How can I use WebGL to create a tile-based multi-layer scrolling platform game?

  - by Nicholas Hill

  I've found WebGL (based on OpenGL) to be a fiendish and unforgiving framework for those learning to write HTML5-based games. Despite the presence of many examples on how to get started, I'm really struggling to understand how I could simply load a bunch of images and render them to a canvas quickly using WebGL. My specific scenario involves trying to render a map using a bespoke but simple multi-layered tile engine, where each value in a three dimensional array points to the image to use for that location in the rendered image. Think "Sonic the Hedgehog" via tilesets, tiles, maps, layers, sprites etc. Can anyone enlighten me: 1) How can I load an image that I can use as a texture in WebGL? 2) How can I dynamically select an image at run time and draw it at any co-ordinate, that I also select at run time?

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• Choosing the right version control system for .NET projects [closed]

  - by madxpol

  I'm getting ready for my first "bigger" .NET project (ASP.NET MVC 3/4) on which I'm going to lead another 2 programmers and right now I'm choosing the right version control system for the job (plus I'm gonna use it for my future development too). My problem is that I did't use any version control system before, so I would like it to have as fast learning curve and intuitive merging as possible. So far I quickly looked at VisualSVN (I like the Visual Studio integration in it), but I'm reading everywhere how Git is awesome and dunno which one to choose (not limited to these two).. Maybe I'm ovethinking this but I like when everything goes smoothly:) I'd like to hear some opinions from people who used multiple version control systems (preferably on VS projects) what do you think is the less complicated and effective version control system for such a use (one to 5 man projects)?

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• How to unit test image processing code?

  - by rold2007

  I'm working in image processing (mainly OCR) and I wonder how I should integrate unit tests in my development. I'm already using unit tests for more "common" type of code but when dealing with image processing code I'm not sure how to deal with it. This kind of code always need some image data input/output and mocking this is not obvious. For now I'm mostly doing integration tests but they take a while to run and I would like some ideas on how to break down this kind of code into unit tests so that I can run them more quickly.

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• Is a finite state machine an appropriate solution for this situation?

  - by user1936

  I was writing some test code as an example where I had a washing machine class. It has a door state that should be open or closed, and also a running state, either on or off. I want to prevent the running state from changing from 'off' to 'on' when the door is 'open', and also prevent the door from being set to 'open' while the machine is 'on'. I have this functionality rigged up with a bunch of if statements. It feels inelegant and it could quickly turn into spaghetti code if I want to add another state that puts additional conditions on the changes of other states. I wonder, is a finite state machine a solution for this situation? Would it simplify adding states and defining valid transitions?

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