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  • Storing a Hex Grid

    - by Pedro Caetano
    I've been creating a small hex grid framework for Unity3D and have come to the following dilema. This is my coordinate system (taken from here) Link because I'm a new user It all works pretty nicely except for the fact I have no idea how to store it. I originally intended to store this in a 2D array and use images to generate my maps. One problem was that it had negative values (this was easily fixed by offsetting the coordinates a bit). However, due to this coordinate system, such an image or bitmap would have to be diamond shaped - and since these structures are square shaped, this would cause a lot of headaches even if I hack something together. Is there anything I'm missing that could fix this? I recall seeing a forum post regarding this in the unity forums but I can no longer find the link. Is writing a set of coordinate translators the best solution here? If you guys think it would be helpful, I can post code and images of my problem.

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  • How to fix Ubuntu 12.04.3 boot to black screen full of errors in white text, after upgrading on dell inspiron 1501

    - by Ibuntu
    I am running a Dell Inspiron 1501 I use Linux only. No Microsoft or Apple operating systems (or really anything closed-source). I've only been using Linux for a little over a year but I'm starting to gain a comfortable level of familiarity with the system and terminology. I've been having some issues with Quantel Quetzal and Raring Ringtail, especially with older hardware, so I opted to install Ubuntu 12.04.3 Precise Pangolin on the Inspiron 1501. I checked my MD5 sum after downloading my ISO and all was good. I have in fact used this iso/dvd to install Precise Pangolin successfully on a few other systems (some of which are even older than this laptop). Install goes fine. The wireless card doesn't work out of the box but this is a known issue which is fairly easy to fix. So, first thing I did was open up a terminal and run sudo apt-get update && sudo apt-get upgrade which, part way through, crashed (I assume lightdm and possibly X) and took me to a black screen filled with white lines of text that were either errors or just the ouputs of commands. The reason I say that is because I was unable to gleam any useful information from the output on the screen. I did take a picture however and will post a link. After that, every time I boot the system it goes right to that black screen posting all the error messages or output in white text. I never get a purple Ubuntu splash, so from what I can tell after reading this wiki article: https://wiki.ubuntu.com/X/Troubleshooting/BlankScreen That means that after the kernel is selected, it is unable to correctly implement the settings it needs. If the purple splash never shows, the frame buffer was never set correctly right? This leads me to believe that it could be a kernel issue? The wiki suggested to try and pinpoint the issue by rolling back kernels until I find one that works. Is this my best option? I think I'm going to give it a try anyways and will let everyone know if I am able to solve the issue this way. I have since done a few reinstalls and some trouble-shooting including a couple hours scouring the net for anyone with any kind of similar issue. Most of the issues I could find involved getting a black screen after login and none of them said anything about any information output on this black screen. My reinstalls have taught me that there is no issue updating, but as soon as I run sudo apt-get upgrade my system goes to the black screen and every time I boot it up it does the same thing. The only way to fix is by reinstall. I never get any ability to log in. After a hard power off to the laptop (because I cannot use ctrl+alt+del to reboot) when it boots again it goes to the grub boot menu and I can select between regular boot, recovery mode and the two memtest options. I never tried the memtest options but the other two both lead to the same black screen. Some people having a black/blank screen issue claim to have fixed it by using 12.10 or 13.04 but I believe they were having a different issue where they got a black/blank screen after logging in. I think I will still give these images a try, but mostly figured I would just wait another day or two for 13.10. Other things I figured I would try from the following three articles: After logging in, there's a black screen and my cursor, nothing else! in Ubuntu 12.10 Black Screen on Login After Upgrading to 12.04 I can't get to the login screen include opening a terminal using ctrl+alt+f1 and trying a variety of reseting unity, x settings, lightdm (or switching to gdm); but I doubt this will work or that I will even be able to access a terminal. I'm pretty sure the whole system is stuck after it loads the last line on the black screen. I will try these things and post more information when I have. Hopefully someone has an idea in the meantime and I will keep checking back trying to find a solution. Thank you. Here are 3 different pictures of the error message. I had to take with my phone: http://ubuntuone.com/album/0TBBkxmVajJIQQtoN9mVdN

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  • Devoxx Coming Up!

    - by Yolande
     Devoxx, the biggest Java conference in Europe, is  only a couple of days away. From November 12th to  16th, over 3,400 developers from all over Europe  are descending on Antwerp, Belgium for a week  focused on Java.  At the Oracle booth, Java experts will be available  to answer your  questions and demo the new  features of the Java Platform, including Java  Embedded,  JavaFX, JavaSE and Java EE.  Beer bash at the booth Tuesday from 17:30-19:30 and Wednesday/Thursday from 18:00 to 20:00. Oracle is also raffling off two Raspberry PI and books every day. Make sure to stop by  and enter the raffle during the day. Check the online schedule with sessions from the Java experts at Oracle.

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  • ubuntu 12.10 graphic does not works correctly

    - by Amin
    I have installed Ubuntu 12.10 but my graphic does not works correctly. I used this command to installation: sudo apt-get install fglrx fglrx-amdcccle fglrx-dev But after the restarting my system, the side panel and upper one does not appear any more! I guessed it maybe that I used some incompatible packages so I removed the graphic card driver by this command: sudo apt-get purge fglrx fglrx-amdcccle fglrx-dev and tried it from graphical way from system setting > Software Sources > Aditional drivers and choosed the second option then applied change. But the resault waas such as before way!! I belive it is because of the Ubuntu does not know my graphic card. I am using VAIO VPCEA2TGX (N/A) and my graphic cart version is Mobility Radeon HD 5400 Series if it is matter. So now what is the exact problem and what I have to solve this?

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  • How to install (or mock) Internet Explorer?

    - by Ivan
    I need to install a Windows application, which checks if there is Internet Explorer of at least 5th version installed and refuses to install (while I believe it does not really need it to work) if it is not. I've tried winetricks to install ie 8, 7, 6 full, 6 versions it offers - none worked - versions 7 and 8 installers report a function missing in msvcr (installing all msvcr versions didn't help), ie6 report some other error (I'll specify if it matters). I've also tried IEs4Linux - it also fails, complaining for a "BadIDChoice" X Window System error received by ies4linux-gtk.py. Is there a way to install any IE version in Ubuntu 10.10 with Wine or to mock its presence? I don't even need it to work, just to be installed in the Wine system so that other Windows programs could see it's there. I use Ubuntu 10.10 with Wine 1.3.8.

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  • Grub2 with BURG: duplicate Windows entries, how do I remove one?

    - by Tomas Lycken
    I have a dual boot system with Ubuntu 12.04 and Windows 7, using GRUB2 (with Burg) as boot loader. For some reason, the Windows installation shows up twice in the boot menu: Ubuntu GNU/Linux, with Linux 3.2.0-24-generic Ubuntu GNU/Linux, with Linux 3.2.0-24-generic (recovery mode) Windows 7 (loader) (on /dev/sda1) Windows 7 (loader) (on /dev/sda2) If I look in my partition table, /dev/sda2 is C:\ of the Windows installation, and /dev/sda1 is the "System Reserved" partition (which, IIRC, is Windows' own bootloader). Furthermore, gparted shows /dev/sda2 - but no other partitions - with a boot flag: What is going on here? I'd like to have only the entries for Ubuntu and one entry for Windows in my boot menu - how do I remove one of them?

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  • What method do I use to manage an app-specific background process?

    - by Simon Dubois
    I am developing an application with different behavior depending on the arguments : "-config" starts a Gtk window to change options, start and close the daemon. "-daemon" starts a background process that does something every X minutes. I already know how to use fork/system/exec etc... But I would like to know the main logic of such application to : restart or refresh the daemon when configuration change. keep only one instance of the daemon. I have read that killing the daemon to restart it is not a clean way to do. How other applications do ? (ubuntuone, weather forecast, rss feed working with notification area) Thanks for your help. PS : I don't want to create a system-wide daemon, just a user application with a background process.

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  • Ubuntu boots into terminal

    - by DKuntz2
    When I turn on my computer (a CR-48), I keep loading tty1. I have tried xstart, and all I get is: Fatal server error: Could not create lock file in /tmp/.tX0-lock When I attempted to make the directory (both sudo and not), I received these two errors: sudo: Can't open /var/lib/sudo/don/tty2: Read-only file system (I've gotten other tty's for different virtual terminals) mkdir: cannot create directory '/tmp/tX0-lock': Read-only file system Before I got to the only terminal state, I had the computer moving a few files from a network server to the computer, I put it to sleep without stopping the transfers, and started the computer again away from my home network, and attempted to stop the transfers, the computer than restarted. Running sudo reboot puts me right back in the virtual terminal, and I can't get into any sort of x application.

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  • Laptop won't get to grub after meddling with kernels

    - by Joren
    I recently found out I had different kernel versions installed, so I removed the 3.9 kernel as proposed in this answer on my earlier question. After that, I updated my grub, but My laptop won't seem to reach it. Output of aptitude search linux | grep ^i: i libselinux1 - SELinux runtime shared libraries i libselinux1:i386 - SELinux runtime shared libraries i linux-firmware - Firmware for Linux kernel drivers i A linux-headers-3.11.0-12 - Header files related to Linux kernel versi i A linux-headers-3.11.0-12-generic - Linux kernel headers for version 3.11.0 on i linux-headers-3.11.4-031104 - Header files related to Linux kernel versi i linux-headers-3.11.4-031104-gen - Linux kernel headers for version 3.11.4 on i linux-headers-generic - Generic Linux kernel headers i linux-libc-dev - Linux Kernel Headers for development i linux-sound-base - base package for ALSA and OSS sound system i pptp-linux - Point-to-Point Tunneling Protocol (PPTP) C i syslinux - collection of boot loaders i syslinux-common - collection of boot loaders (common files) i syslinux-legacy - Bootloader for Linux/i386 using MS-DOS flo i util-linux - Miscellaneous system utilities How do I proceed to fix this error from my live cd?

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  • Config based activation in WCF

    There is a cool WCF feature instroduced in dev10 called configless activation. You don't have to have a *.svc file in your web directory, instead you can activate a WCF service using the following configuration element:   <system.serviceModel>   <serviceHostingEnvironment>     <serviceActivations>      <add relativeAddress="Service1.svc" service="configlessWCF.Service1"/>     </serviceActivations>   </serviceHostingEnvironment> </system.serviceModel> Hope...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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  • I cannot play some WMA files

    - by Lucio
    I did a backup of several music files from my older Windows XP system. Now I can play all the .MP3 files but not all the .WMA. There are some kinds of WMA files that can be reproduced without problems, may refute this in the picture below. The right file can be played, the left isn't. I have long been looking different sites, Q&A from here, installing many packages but not luck. An example is this answer. What can I do? My system: Ubuntu 11.10 32b. Player: Banshee & VLC

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  • Start & Stop internet connexion without broking Network Manager

    - by user3634569
    I am on Precise. I used this command (with an alias), to close the network, dbus-send --system --print-reply --reply-timeout=120000 --type=method_call --dest=org.freedesktop.NetworkManager /org/freedesktop/NetworkManager org.freedesktop.NetworkManager stop it worked, now I have to use dbus-send --system --print-reply --reply-timeout=120000 --type=method_call --dest=org.freedesktop.NetworkManager /org/freedesktop/NetworkManager org.freedesktop.NetworkManager.Sleep boolean:true it work but not so well, sometimes I can't restart the network and NetworkManager is blocked too and strange errors even GUI freeze . What I need is a command line which close the network and don't mess with Network Manager, maybe with the routing table or what else.

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  • Any frameworks or library allow me to run large amount of concurrent jobs schedully?

    - by Yoga
    Are there any high level programming frameworks that allow me to run large amount of concurrent jobs schedully? e.g. I have 100K of urls need to check their uptime every 5 minutes Definitely I can write a program to handle this, but then I need to handle concurrency, queuing, error handling, system throttling, job distribution etc. Will there be a framework that I only focus on a particular job (i.e. the ping task) and the system will take care of the scaling and error handling for me? I am open to any language.

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  • How do I change the "Default" password

    - by Allwar
    hi, here's my problem. When I log in I'm beeing asked for a password connecting to the internet which is strange because I'm the only user and the admin. I have auto log in and it never asks for passwords, (except when i do administrative tasks.) I have looked in the menu (System -- preferences, but i can't find any topic that say's passwords or similar. the only place where I have found a way to change my password is my user ((System -- preferences -- user and groups). I did try to take screenshots but nothing happened, which also is strange. I'm running ubuntu 10.04 LTS Desktop on my Asus 1201n (12").

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  • How can I get textures on edge of walls like in Super Metroid and Aquaria?

    - by meds
    Games like Super Metroid and Aquaria present the terrain with the other facing parts having rocks and stuff while deeper behind them (i.e. underground) there's different detail or just black. I would like to do something similar using polygons. Terrain is created in my current level as a set of overlapping square boxes. I'm not sure if this rendering method will work such a system for creating terrain but if anyone has ideas I'd love to hear them. Otherwise I'd like to know how I should re-write the terrain rendering system so it actually works to draw terrain in this manner...

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  • Booting but not rebooting from external USB hard drive, what could be the problem?

    - by user8276
    I have a Dell Inspiron 6400 laptop with a dead internal hard drive controller. It boots perfectly from CD or USB. I therefore removed the internal hard drive and installed Ubuntu 10.10 Maverick onto an external USB hard drive. It boots and runs perfectly when doing a "cold start" of the PC. However, when I choose restart/reboot in the Ubuntu menu (e.g. after an update), I get this error message from the BIOS: "No bootable devices, strike f1 to retry boot, f2 for setup utility, press f5 to run onboard diagnostics". I can make the system boot again by pressing f2 or f5 and exiting the utility without having done anything. Or, I can simply power off the system and do a new "cold start". Does anyone know the likely reason for this problem and how to fix it. It is not a big issue but an annoyance that I would like to fix if possible.

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  • lighter-weight (semantic) scuttle

    - by hroptatyr
    Before patching scuttle or semanticscuttle I thought I'd ask if anyone knows of a lighter-weight/faster system to tag bookmarks and vote on them? LAMP is fine. Ideally, I should be allowed to interfere with the database directly. My actual problem is I want to administer roughly 80m bookmarks, tag them, vote on them (it's just 10 users accessing the system), but here's the thing: All of those bookmarks will change their descriptions (and title lines) at least once a day. Both systems support the del.icio.us API but my LAMP stack is unable to cope with the load.

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  • It's 2011 - why do I still have to use tables for email?

    - by John Isaacks
    This might seem like a rant, but I am curious. CSS replaced tables for layout a long time ago. But we still have to use tables for layout when creating rich emails. Why is this? Are there any other options? Are there really technical constraints that prevent CSS from working in an email. What are they? I can see how linked or embedded style sheets might be a problem, but not even inline styles work. Is this ever going to change?

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  • Keeping your options open in a cloud solution

    - by BuckWoody
    In on-premises solutions we have the full range of options open for a given computing solution – but we don’t always take advantage of them, for multiple reasons. Data goes in a Relational Database Management System, files go on a share, and e-mail goes to the Exchange server. Over time, vendors (including ourselves) add in functionality to one product that allow non-standard use of the platform. For example, SQL Server (and Oracle, and others) allow large binary storage in or through the system – something not originally intended for an RDBMS to handle. There are certainly times when this makes sense, of course, but often these platform hammers turn every problem into a nail. It can make us “lazy” in our design – we sometimes don’t take the time to learn another architecture because the one we’ve spent so much time with can handle what we want to do. But there’s a distinct danger here. In nature, when a population shares too many of the same traits, it can cause a complete collapse if a situation exploits a weakness shared by that population. The same is true with not using the righttool for the job in a computing environment. Your company or organization depends on your knowledge as a professional to select the best mix of supportable, flexible, cost-effective technologies to solve their problems, whether you’re in an architect role or not.  So take some time today to learn something new. The way I do this is to select a given problem, and try to solve it with a technology I’m not familiar with. For instance – create a Purchase Order system in Excel, then in Hadoop or MongoDB, or even in flat-files using PowerShell as an interface. No, I’m not suggesting any of these architectures are the proper way to solve the PO problem, but taking something concrete that you know well and applying that meta-knowledge to another platform will assist you in exercising the “little grey cells” and help you and your organization understand what is open to you. And of course you can do all of this on-premises – but my recommendation is to check out a cloud platform (my suggestion would of course be Windows Azure :) ) and try it there. Most providers (including Microsoft) provide free time to do that.

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  • Choppy, stuttery & sped-up sound after update

    - by Synesso
    My audio has always worked perfectly on this hardware and 12.04. Yesterday I received an update, including a kernel update. Today the sound is periodically stuffed. In youtube, mkv files via VLC and embedded audio in web pages (memrise.com) the sound can become stuttery, sped up or stopped mid play-back. Where can I go to find if this is a known problem, or report it if it is not? Also, can I find a log that will tell me what packages were updated on my machine yesterday?

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  • Fix hibernate on Thinkpad X60 with 12.04 Precise Pangolin

    - by ddaa
    I own a ThinkPad X60, hibernate used to work on 10.04 Lucid Lynx, but no longer works correctly on 12.04. I am aware of how to enable hibernate in Power Manager. The problem here is, in the default configuration, pm-hibernate works, but the system fails to resume correctly. There is no video glitch, black screen or other. The resume process just freezes on the Ubuntu splash boot after a few seconds of disk activity. Is there a way to fix the system configuration so hibernates works again?

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