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  • Pathfinding library

    - by Shivan Dragon
    I'm an amateur game developer and somewhat amateur Java developer as well. I'm trying to find a way to have path finding for my game(s). I've first Googled for some existing Java libraries that have various path-finding implementations, but I've failed to find any. It seems to me that the only way to get pathfinding code is to use it via a game engine (like Unity). But I'd just like to have a library that I can use and make the game loop and other stuff on my own. Failing to find such a library I've tried implementing some algorithms myself. I've managed to make a running A* in Java, but for fancier stuff like D* I find it hard to do it by hand. So then, my question is, are there any Java libraries that contain at least some basic pathfinding algorithms implementations?

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  • Building small Ubuntu server - What hardware is recommended?

    - by 10robinho
    There are many of us who need to build small Ubuntu server. Problem is that in some countries it is hard to find and quite expensive to buy server motherboards and processors. And when one is building small server with limited budget, buying some Xenons is not really an option. So, are there any general recommendations for hardware (I think that motherboards are the main issue) that is stable and fast under Linux? I read that Intel should be the best choice for cpu + mbo combo. So, I was looking around for some Intel motherboards + i7 Ivy Bridge (like Intel DZ77BH-55K with Z77 chipset and Intel i7 3770K) but I've read that they have some issues with kernel, booting and USB ports. That is why I ask community if you have any experience with this. Maybe Intel is not the best choice here? Maybe ASUS or Gigabyte or _other company_ are more stable with Linux? I hope that this Q&As can help people in building stable Ubuntu server.

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  • Hamachi² configuration file... Where is it?

    - by Cinaed666
    I recently installed hamachi² and haguichi on my 10.10 machine. It works, but it loses its connection every few minutes and I have to reconnect. I looked into this, and apparently I need to set the KeepAlive in the configuration file to 100. This shouldn't be a hard task, so I looked for the hamachi directory. I checked the obvious place: /home/username/.hamachi ... but this directory doesn't exist. (Yes, I did enable hidden files.) After doing a file search for hamachi, it returned nothing either. I'm in the dark here, what am I missing?

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  • How to Multitask in the Linux Terminal: 3 Ways to Use Multiple Shells at Once

    - by Chris Hoffman
    The Linux terminal has rich multitasking capabilities. You can switch between the virtual consoles already running on your system, use Bash job control to run processes in the background, and take advantage of GNU screen, a terminal “window manager.” You don’t have to stick to a single command at a time. Whether you want to run a process in the background and revisit it occasionally or run multiple time-consuming tasks at once, Linux offers several options. How to Stress Test the Hard Drives in Your PC or Server How To Customize Your Android Lock Screen with WidgetLocker The Best Free Portable Apps for Your Flash Drive Toolkit

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  • 5 Things I Learned About the IT Labor Shortage

    - by Oracle Accelerate for Midsize Companies
    by Jim Lein | Sr. Principal Product Marketing Director | Oracle Midsize Programs | @JimLein Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif"; mso-bidi-font-family:"Times New Roman";} 5 Things I Learned About the IT Labor Shortage A gentle autumn breeze is nudging the last golden leaves off the aspen trees. It’s time to wrap up the series that I started back in April, “The Growing IT Labor Shortage: Are You Feeling It?” Even in a time of relatively high unemployment, labor shortages exist depending on many factors, including location, industry, IT requirements, and company size. According to Manpower Groups 2013 Talent Shortage Survey, 35% of hiring managers globally are having difficulty filling jobs. Their top three challenges in filling jobs are: 1. lack of technical competencies (hard skills) 2. Lack of available applicants 3. Lack of experience The same report listed Technicians as the most difficult position to fill in the United States For most companies, Human Capital and Talent Management have never been more strategic and they are striving for ways streamline processes, reduce turnover, and lower costs (see this Oracle whitepaper, “ Simplify Workforce Management and Increase Global Agility”). Everyone I spoke to—partner, customer, and Oracle experts—agreed that it can be extremely challenging to hire and retain IT talent in today’s labor market. And they generally agreed on the causes: a. IT is so pervasive that there are myriad moving parts requiring support and expertise, b. thus, it’s hard for university graduates to step in and contribute immediately without experience and specialization, c. big IT companies generally aren’t the talent incubators that they were in the freewheeling 90’s due to bottom line pressures that require hiring talent that can hit the ground running, and d. it’s often too expensive for resource-strapped midsize companies to invest the time and money required to get graduates up to speed. Here are my top lessons learned from my conversations with the experts. 1. A Better Title Would Have Been, “The Challenges of Finding and Retaining IT Talent That Matches Your Requirements” There are more applicants than jobs but it’s getting tougher and tougher to find individuals that perfectly fit each and every role. Top performing companies are increasingly looking to hire the “almost ready”, striving to keep their existing talent more engaged, and leveraging their employee’s social and professional networks to quickly narrow down candidate searches (here’s another whitepaper, “A Strategic Approach to Talent Management”). 2. Size Matters—But So Does Location Midsize companies must strive to build cultures that compete favorably with what large enterprises can offer, especially when they aren’t within commuting distance of IT talent strongholds. They can’t always match the compensation and benefits offered by large enterprises so it's paramount to offer candidates high quality of life and opportunities to build their resumes in alignment with their long term career aspirations. 3. Get By With a Little Help From Your Friends It doesn’t always make sense to invest time and money in training an employee on a task they will not perform frequently. Or get in a bidding war for talent with skills that are rare and in high demand. Many midsize companies are finding that it makes good economic sense to contract with partners for remote support rather than trying to divvy up each and every role amongst their lean staff. Internal staff can be assigned to roles that will have the highest positive impact on achieving organizational goals. 4. It’s Actually Both “What You Know” AND “Who You Know” If I was hiring someone today I would absolutely leverage the social and professional networks of my co-workers. Period. Most research shows that hiring in this manner is less expensive and time consuming AND produces better results. There is also some evidence that suggests new hires from employees’ networks have higher job performance and retention rates. 5. I Have New Respect for Recruiters and Hiring Managers My hats off to them—it’s not easy hiring and retaining top talent with today’s challenges. Check out the infographic, “A New Day: Taking HR from Chaos to Control”, on Oracle’s Human Capital Management solutions home page. You can also explore all of Oracle’s HCM solutions from that page based on your role. You can read all the posts in this series by clicking on the links in the right sidebar. Stay tuned…we’ll continue to post thought leadership on HCM and Talent Management topics.

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  • Completely uninstall/reinstall Eclipse and add support for php and jquery

    - by ganjan
    I have been using Eclipse a short while and it worked perfectly until I started downloading different plugins that I didn't really need. Now I get a ton of different errors and can't even open a php file. What I want to do is just to remove Eclipse and reinstall it, but that was much harder that I first thought. I marked every eclipse package in synaptic packaged manager and selected complete removal, I even deleted the .meta folder in my working dictionary, but when I installed eclipse again. It was as if I hadn't removed anything. Same errors from the plug-ins I had installed before. Seems like when you install something in linux, files are stored all over the place. Makes real hard do remove anything. So how do I COMPLETELY remove Eclipse, reinstall it and add support for php and jquery. Thanks.

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  • Cuda vs OpenCL - opinions

    - by Martin Beckett
    Interested in peoples opinions of Cuda vs openCL following NVidia's Cuda4 release. I had originally gone with openCL since cross platform, open standards are a good thing(tm). I assumed NVidia would fall into line as they had done with openGL. But having talked to some NVidia people, they (naturaly) claim that they will concentrate on CUDA and openCL is hampered by having committees and having to please everyone - like openGL. And with the new tools and libs in CUDA it's hard to argue with that. -I'm in a fairly technical market so I can require the users to have particular HW.

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  • Is it normal needing time to understand code i wrote recently

    - by user1478167
    By recently i mean some weeks ago. I am trying to continue a project i left 2 weeks ago and i need time to understand some functions i wrote(not copied from somewhere) and it takes me time. Normally i don't need to because my functions,methods etc are black boxes but when i need to change something it's really hard. Does this mean i write bad code? I am still in school and i am the only who writes/uses the code so i don't have feedback, but i am afraid that if it is difficult for me to understand it, it would be 10 times more difficult for someone else. What should i do? I write a lot of comments but most of the time are useless when reviewing. Do you have any suggestions?

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  • Facebook Game Rejected: "Your app icon must not overlap with content in your cover image"

    - by peterwilli
    Sorry if this isnt the right stackexchange site to ask this, it was really hard to determine. My FB game just recently got rejected for 2 reasons. The first I fixed nicely and is irrelevant but the second I just can't see to figure out what they mean and I was hoping someone else got the same issue and did know what they meant. These are the errors: You can ignore the error under "Banners" The web preview of my game looks like this now: All I know is that the rejection has something to do with the cover image, not the icons or the screenshots. Please let me know what to do to get approved. Thanks a lot!

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  • Alternative Grid Layout for Silverlight suggestion

    - by brainbox
    I've proposed a suggestion to create alternative grid layout for Silverlight. Please vote for it if also faced the same problems. As i write before current Silverlight Grid Layout breakes best practices of HTML and Adobe Flex Grid layouts. Current defention based approach have following disadvantages that makes xaml coding very hard: 1. It is very hard to create new row. In that case you should rewriteall Grid.Row and Grid.Columns for all rows inserted below.2. Defenitions are static by their nature and because of it, it isimpossible to use grid for dynamic forms. Currently even in toolkit DataFormMicrosoft is using StackPanel. But StackPanel is not designed for multicolumn layout that have dataform. Here is a sample code of AdobeFlex datagrid, which incorporates bestpractices of HTML. <mx:Grid id="myGrid">        <!-- Define Row 1. -->       <mx:GridRow id="row1">           <!-- Define the first cell of Row 1. -->           <mx:GridItem>               <mx:Button label="Button 1"/>           </mx:GridItem>           <!-- Define the second cell of Row 1. -->           <mx:GridItem>               <mx:Button label="2"/>           </mx:GridItem>           <!-- Define the third cell of Row 1. -->           <mx:GridItem>               <mx:Button label="Button 3"/>           </mx:GridItem>       </mx:GridRow>        <!-- Define Row 2. -->       <mx:GridRow id="row2">           <!-- Define a single cell to span three columns of Row 2. -->           <mx:GridItem colSpan="3" horizontalAlign="center">               <mx:Button label="Long-Named Button 4"/>           </mx:GridItem>       </mx:GridRow>        <!-- Define Row 3. -->       <mx:GridRow id="row3">           <!-- Define an empty first cell of Row 3. -->           <mx:GridItem/>           <!-- Define a cell to span columns 2 and 3 of Row 3. -->           <mx:GridItem colSpan="2" horizontalAlign="center">               <mx:Button label="Button 5"/>           </mx:GridItem>       </mx:GridRow>    </mx:Grid>

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  • Beginner's guide to writing comments?

    - by Cameron
    Is there a definitive guide to writing code comments, aimed at budding developers? Ideally, it would cover when comments should (and should not) be used, and what comments should contain. This answer: Do not comment WHAT you are doing, but WHY you are doing it. The WHAT is taken care of by clean, readable and simple code with proper choice of variable names to support it. Comments show a higher level structure to the code that can't be (or is hard to) show by the code itself. comes close, but it's a little concise for inexperienced programmers (an expansion on that with several examples and corner cases would be excellent, I think).

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  • Oracle Technology Network Newsletters Revisited

    - by Justin Kestelyn
    You may find this hard to believe, some analysts content that email newsletters are still among the most preferred methods of "information awareness" by developers today. And in our experience, the numbers back it up: subscriptions to Oracle Technology Network newsletters grow organically by 15% every year, even after you take continual list cleanup into account. At this point, we have honed our newsletter strategy to a fine edge; the choices are now: Oracle's Java Developer Newsletter Oracle's Database Application Developer Newsletter (also suitable for DBAs) Oracle's Architect Community Newsletter Oracle's Solaris Community Newsletter (new!) Oracle's .NET Developer Newsletter All of which you can subscribe to here; sample issues also available. Have a taste, you'll like them!

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  • FIREFOX UNRESPONSIVE

    - by James Tweed
    As my laptop hard rive was knackered i was adivsed to use ubuntu, it set-up perfectly. but i tried downloading google chrome and flash player because i couldnt watch any videos and now FIREFOX has become unresponsive. It says ' firefox is already running but it is not responding. To open a new window, you must firstr close the exisitng firefox process or restart your system I tried restarting but hasn't worked. Ubuntu also asked me if i wanted to do a update which i did, could this be a problem also. Need help desperately going insane James

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  • Working as Test Engineer and looking to move into Identity Management Technology. Possible?

    - by Aditi Bhatnagar
    I have been working as Test Engineer for past 2.5 year. The project is related to Identity Management and I am in love with the technology. I want to move into the same field. I don't aim to be a hard core coder but rather an analyst or an IDM architect. Is it realistically possible to do so? I see some possible issues, since the field is fairly new in India and for the time being I don't have coding/deployment experience at all. If it is nonetheless possible to switch into this new technology, what kind of effort I have to put in? What are the possible steps that you can suggest to try this switch?

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  • Question about Target parameter of Matrix.CreateLookAt

    - by manning18
    I have a newbie question that's causing me a little bit of confusion when experimenting with cameras and reading other peoples implementations - does this parameter represent a point or a vector? In some examples I've seen people treat it like a specific point they are looking at (eg a position in the world), other times I see people caching the orientation of the camera in a rotation matrix and simply using the Matrix.Forward property as the "target", and other times it's a vector that's the result of targetPos - camPos and also I saw a camPos + orientation.Forward I was also just playing around with hard-coded target positions with same direction eg 1 to 10000 with no discernible difference in what I saw in the scene. Is the "Target" parameter actually a position or a direction (irrespective of magnitude)? Are there any subtle differences in behaviors, common mistakes or gotchas that are associated with what values you provide, or HOW you provide this paramter? Are all the methods I mentioned above equivalent? (sorry, I've only recently started and my math is still catching up)

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  • Fan control on Acer Aspire One D255 netbook

    - by AdamB
    I have Ubuntu netbook edition on my Acer Aspire One D255 netbook and I notice that I always hear the fan working at 100% despite the actual temperature. I run the sensors command its only at 13c, theres no reason why the fan needs to be running this hard at that temp. root@adam-netbook:~# sensors acpitz-virtual-0 Adapter: Virtual device temp1: +13.0°C (crit = +100.0°C) I'm guessing I may need some drivers in order to interact with the fan? Does anyone have any experience with this? It also seems that "sensors" may not be all that accurate, the temperature never seems to fluctuate.

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  • Is the 'C' in MVC really necessary?

    - by Anne Nonimus
    I understand the role of the model and view in the Model-View-Controller pattern, but I have a hard time understanding why a controller is necessary. Let's assume we're creating a chess program using an MVC approach; the game state should be the model, and the GUI should be the view. What exactly is the controller in this case? Is it just a separate class that has all the functions that will be called when you, say, click on a tile? Why not just perform all the logic on the model in the view itself?

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  • WiFi not working in Ubuntu 13.10 with Ralink RT3290

    - by Francisco
    I have upgraded from Ubuntu 13.04 to Ubuntu 13.10 and now my WiFi doesn't work. It takes a lot of time to connect but when connected, connection is quickly lost again. In Ubuntu 13.04 worked fine. Here are some outputs: lspci | grep Wireless 01:00.0 Network controller: Ralink corp. RT3290 Wireless 802.11n 1T/1R PCIe sudo rfkill list 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no lsmod | grep rt2800 rt2800pci 18966 0 rt2800lib 95449 1 rt2800pci rt2x00pci 13287 1 rt2800pci rt2x00mmio 13661 1 rt2800pci rt2x00lib 56053 4 rt2x00pci,rt2800lib,rt2800pci,rt2x00mmio mac80211 634661 3 rt2x00lib,rt2x00pci,rt2800lib eeprom_93cx6 13344 1 rt2800pci crc_ccitt 12707 1 rt2800lib dmesg | grep rt2800 [ 19.959959] rt2800pci 0000:01:00.0: irq 46 for MSI/MSI-X modinfo rt2800pci | grep 3290 alias: pci:v00001814d00003290sv*sd*bc*sc*i*

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  • How do I execute a file from a FAT USB drive?

    - by Derek Redfern
    I'm trying to install a portable app onto my USB drive such that it is compatible with both Ubuntu and Windows (specifically, a program called eToys). Support is already built into the app for both operating systems - there's etoys.sh for Ubuntu and etoys.exe for Windows. I decided to install onto a FAT drive since that can be read from both systems. This works fine for Windows, but for some reason I cannot execute etoys.sh on Ubuntu. The problem is not with the file - when the whole folder is copied to the local hard drive, the app works great in Ubuntu. But when I try to execute it from the USB, it opens the file in a text editor. I then tried running it from a terminal, but I got the message "Permission denied." I've had the same problem with other executables as well. Is there an easy way to execute things from a USB stick? Thanks! -- Derek

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  • Install Ubuntu and erase Windows Vista

    - by miguel
    I have an older laptop with a ADA hard disk I can't really buy a new one so I want to erase Windows Vista on my computer and only have Ubuntu so that I can have more space. How do I make it go directly to my blank CD? My Windows Vista is messed up and I can't even get into it. I want to download the new version of Ubuntu while in Ubuntu. I downloaded it but it didn't go directly to the blank CD. I tried to copy all of Ubuntu onto the CD once it was downloaded but it says there was an error while copying. What should I do?

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  • Wisdom of using open source code in a commercial software product

    - by Mr. Jefferson
    I'm looking at using some open source code in my ASP.NET web app (specifically dapper). Management is not a fan, because open source is seen as a risk that has bitten us before. Apparently previous developers have had to rewrite things after having open-source components fail. The pros seem to be: It does a lot of stuff for me that would otherwise involve either lots of boilerplate code or Microsoft's recommended but slower solution (Entity Framework). Cons: It's complex enough that if it were to fail suddenly in production, I would be hard pressed to fix it. However, it's in use on a much higher-traffic site than mine, so I don't think it'll end up being a high risk portion of the project. What is the consensus here? Is it unwise to use open source code in my project that I don't know/understand as well as I do my own code?

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  • Obtaining In game Warcraft III data to program standalone AI

    - by Slav
    I am implementing common purpose behavioral algorithm and would like to test it under my lovely Warcraft III game and watch how it will fight against real players. The problem is how to obtain information about in game state (units, structures, environment, etc. ). Algorithm needs access to hard drive and possibly distributed computing, that's why JASS (WC3 Editor language) usage doesn't solve the issue. Direct 3D hooking is an approach, but it wasn't done for WC3 yet and significant drawback is inability to watch online at how AI performs since it uses the viewport to issue commands. How in game data can be obtained to a different process in a fastest and easiest way? Thank you.

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  • Limit the amount a camera can pitch

    - by ChocoMan
    I'm having problems trying to limit the range my camera can pitch. Currently my camera can pitch around a model without restriction, but having a hard time trying to find the value of the degree/radian the camera is currently at after pitching. Here is what I got so far: // Moves camera with thumbstick Pitch = pController.ThumbSticks.Right.Y * MathHelper.ToRadians(speedAngleMAX); // Pitch Camera around model public void cameraPitch(float pitch) { pitchAngle = ModelLoad.camTarget - ModelLoad.CameraPos; axisPitch = Vector3.Cross(Vector3.Up, pitchAngle); // pitch constrained to model's orientation axisPitch.Normalize(); ModelLoad.CameraPos = Vector3.Transform(ModelLoad.CameraPos - ModelLoad.camTarget, Matrix.CreateFromAxisAngle(axisPitch, pitch)) + ModelLoad.camTarget; } I've tried restraining the Y-camera position of ModelLoad.CameraPos.Y, but doing so gave me some unwanted results.

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  • Is Haskell's type system an obstacle to understanding functional programming?

    - by FarmBoy
    I'm studying Haskell for the purpose of understanding functional programming, with the expectation that I'll apply the insight that I gain in other languages (Groovy, Python, JavaScript mainly.) I choose Haskell because I had the impression that it is very purely functional, and wouldn't allow for any reliance on state. I did not choose to learn Haskell because I was interested in navigating an extremely rigid type system. My question is this: Is a strong type system a necessary by-product of an extremely pure functional language, or is this an unrelated design choice particular to Haskell? If it is the latter, I'm curious what would be the most purely functional language that is dynamically typed. I'm not particularly opposed to strong typing, it has its place, but I'm having a hard time seeing how it benefits me in this educational endeavor.

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  • Unable to start the web application from localhost:3000(ruby on rails)

    - by vipin8169
    I had created a demo web application by executing rails tickets and then i executed rails script/server to run it on localhost. Initially i was able to execute the application in the browser by typing localhost:3000 in the address bar, but then I deleted the folder tickets from my hard disk. Now again i created the same folder but when i try to run it using the same command rails script/server it says that vverma@l-vverma:~/railsExp/tickets$ rails script/server create File exists - script/server I tried deleting the script/server file but i still couldn't run the localhost:3000 in the browser Tried rails s as well, it gave the following output:- http://paste.ubuntu.com/1317610/ But still i was unable to run the app on 'localhost:3000' What is the solution to this

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