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• Help with Meshes, and Shading

  - by Brian Diehr

  In a game I'm making in LibGdx, I wish to incorporate a ripple effect. I'm confused as to how I get access to the individual pixels on the screen, or any way to influence them (apart from what I can do with sprite batch). I have my suspicions that I have to do it through openGL, and it has something to do with apply a mesh? This brings me to my question, what exactly is a mesh? I've been working on my game for about half a year, and am doing great with the other aspects of the game, but I find this more advance stuff isn't as well documented. Thanks!

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• Gone in 60 Seconds: An Insecure Database is an Easy Target

  - by Troy Kitch

  According to the recent Verizon Data Breach Investigations Report, 98% of breached data originates from database servers and nearly half are compromised in less than a minute! Almost all victims are not even aware of a breach until a third party notifies them and nearly all breaches could have been avoided through the use of basic controls. Join us for this November 28th webcast to learn more about the evolving threats to databases that have resulted in over 1 billion stolen records. Also, hear how organizations can mitigate risks by adopting a defense-in-depth strategy that focuses on basic controls to secure data at the source - the database. There's no turning back the clock on stolen data, but you can put in place controls to ensure your organization won't be the next headline. Note, this webcast will be recorded for on-demand access after November 28th. 

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• What do the various dpkg flags like 'ii' 'rc' mean?

  - by theTuxRacer

  I frequently need to check which packages are installed, and I use the following command: dpkg -l | grep foo which gives the following output Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Description ii foo <version> <description> What does the ii mean? What other flags are there? How to read the flags? (because the explanation is quite complicated, IMO) Thanks.

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• Restore the Ctrl + Alt + Num Pad windows positioning commands?

  - by holocronweaver

  Using Unity in Ubuntu 12.04, the Ctrl + Alt + Num Pad combination for positioning windows has been fragmented by Ctrl + Alt + 4 (move window to left half of screen) being changed to Super + Left Arrow. A similar change moved Ctrl + Alt + 6 to Super + Right Arrow. Thus one moves windows to corners using Ctrl + Alt combos, but Super combos are needed to move to the left or right. This is more than a convenience problem since the new windows positioning provided by the super key combos seems to give different sizes than the Ctrl + Alt combos they replaced, leading to distracting gaps between windows when you combine the two methods to position three or more windows on one screen. Is there a way to restore the previous behavior so that I can use Ctrl + Alt + Num Pad for all windows positioning?

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• ALSA Mutes Incorrect Audio Device on Headphone Event

  - by Gardiner

  I know what the problem is, I just don't know how to prevent it. When I plug in my headphones, ALSA automatically mutes (and sets the volume to 0) the 'Speaker' entry in alsamixer. If I go in and manually unmute (and turn the volume up) I have sound from my headphones. Question is, how do I change this behavior? I want it to adjust the volume to half, but not mute or set the volume to 0. I'm using Ubuntu Gnome 13.04 Output of amixer scontents Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] This answer solved my issue: How can I get sound on headphones without switching back to 'Speakers' manually?

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• Chrome window freezes in Ubuntu

  - by Dragon5689

  Sometimes, especially when I open pages that have some kind of multimedia contents, Chrome freezes. It always happens directly after opening a new tab. In contrast to the way Chrome usually has only tabs crashing, the entire windows freezes. If I have multiple separate Chrome windows open, the others keep working. I run Ubuntu 12.04 and Chrome in version 20.0.1132.47 but this has been going on since I last set up my machine around half a year ago. Anyone having the same problems or an idea what could be wrong here?

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• 12.04 - sound is laggy when running games through Wine

  - by orzechowskid

  Lenovo U400 Wine 1.5.5 Ubuntu 12.04 with all updates applied I'm experiencing severe (~500ms) audio lag in all games run in Wine. Portal 2, Half-Life, World of Goo, and Fallout are all exhibiting this problem. When I run winecfg though and click the "Test Sound" button at the bottom of the Audio tab, the sound effect appears to play immediately. So I'm not sure what's going on. I don't think it's a problem with PulseAudio by itself since totem videos and Youtube clips both play in perfect sync. Anyone have any ideas on where to start fixing this? thanks! (edit: I thought this was limited to Steam games but I installed a non-Steam game and I now see that's not the case. I get audio lag in other apps too.)

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• Moving Day

  - by Christopher House

  I've decided that it's time for me to move on from Geeks with Blogs.  It's been a great platform but unforuntately I've not used it nearly as much as I should.  It's been over a year and a half since my last post.  It's not that I haven't had worthwhile stuff to post, it's more due to a lack of motivation.  Knowing how I work, I think part of the problem with me using GWB is that it's free.  If I don't use it, I don't feel like I'm wasting anything.  With that in mind, I've decided to move to a paid host in hopes that drives me to post more frequently.  My new blog is located at the following address:http://thirteendaysaweek.comIn the coming days and weeks I'll be working on moving my content to the new site and will leave posts here that redirect to the new site.

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• Ubuntu 12.04 cannot start

  - by user57215

  I just installed Ubuntu 12.04 64bit, and I cannot start it. I tried twice. The first time, I used a CD I burned. (The CD works for my another computer, so it is OK.) After wubi did something in Windows, it rebooted. Then the screen was stuck where there is an ubuntu logo at the center and 5 dots below. I waited for more than half hour, it was still there and nothing happened. The second time, I installed 11.10, then upgrade to 12.04 in a the newly install 11.10. BTW, the 11.10 did start. After upgrading, I rebooted the computer, it was stuck at the same place. Any one can help me on this? The computer is AMD Phenom II X4 965 + ATI RADEON HD4870. Thanks a lot!

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• Photo sharing social platform [closed]

  - by user1696497

  I am working on a photo sharing social platform like Flickr, Photobucket. To start off with I have half a million photos as of now. I want to convert all of these into a single format, compression ratio and use it as an original image. I will be storing original image, re-sized image according to layout and a thumbnail. I have started off with ruby, didn't find supporting libraries. I am considering python as it has a good image processing library and instagram is using it. I want some advise about how the image has to be processed while uploading, efficient way of storage whether database or a file system, image compressions, and precautions to be taken. I would be having profile pictures, do I need store them separately or along with the images? If I want to store the images on a file system, which file system should I use and also should I store the url or should I use any intermediate key value store like redis?

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• Jumping around to work on different features when you get stuck, is it a source of project failures?

  - by codecompleting

  On personal projects (or work), if one gets stuck on a problem, or waiting to figure out a solution to the problem, if you jump to another section of your code, don't you think it will be a good reason your application will be buggy or worse yet never get completed? Assuming you are not using git and code each feature to a specific branch, things can get out of hand since you have 3 different features you are working on, and you have unresolved issues in each. So when you get done to work, you get stressed out because you have these hanging issues and half-baked code lingering about. What's the best way to avoid this problem? (if you have it) I'm guessing using something like git and creating a branch per feature is the safest way to avoid this bad habit. Any other suggestions?

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• Usefull skills from a computer science degree

  - by Tom Squires

  I did my degree in physics and moved later into programming. I have two and a half years experience under my belt and like to think I write good code. I am, however, concerned that not doing a compsci degree has left holes in my knowledge. I would like to fill those up now since I know I want to be doing programming for the rest of my career. What skills/techniques did you learn in your compsci degree that one wouldn't pick up from on-the-job programming?

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• Split Texture2D Across Line

  - by Simie

  Background I'm using a texture as a damage map represented by an array of floats for displaying damage effects on a space ship in a process. An upside of this is being able to 'slice' ships in half, using an input damage map with a line down the middle, as shown in the diagram below. Question However, I'm encountering problems separating this split ship into two different entities. I would like to be able to split the image down the 'damage line', in a process similar to this: I don't have much idea where to start detecting the red line above. Any advice would be welcome.

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• INstlling ubuntu

  - by Erich

  Am trying to install ubuntu 12.04 on a pentium 4 with a hard disk that's been totally wiped clean. Have made an iso image, burned it on a cd and it has been verified. Checked to see if separate files have been burned on cd and they have. When I boot to the disk I get the word unbuntu with some progress dots, 5 min later it goes to a red screen with the mouse arrow on screen. It has stayed in this condition for over half an hour now. Help? erich

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• Java Thriving in Oracle's hands

  - by Tori Wieldt

  IDC has published a Technology Assessment of Oracle's stewardship of Java titled "The State of Java: Two and a Half Years After the Acquisition." The overall IDC opinion is that Java under Oracle's stewardship is thriving. Report highlights include: The successful delivery of Java SE 7, which had been stalled at Sun Microsystems Articulation of realistic road maps for Java EE 7 and Java SE 8 The healthy growth of the Java ecosystem The decisiveness with which Oracle handled the Apache Harmony dispute Key vendors joining the OpenJDK including IBM, Apple, and SAP More and more programming languages being hosted on the Java Virtual Machine(JVM) Java's role in major computing trends including Mobile, Cloud, Big Data and Social You can access the full report here (PDF).

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• usb stop working

  - by miguel

  I'm using Xubuntu 12.04 on a 64 bit Intel core duo laptop and the 3 USB 3.0 ports stopped working if I do not use the mouse. I updated the kernel to 3.9 but the bug persists. I googled too much and the few reponses I got cannot fixed this. The only solution is shuting down, unplugging and then plugging them back, then all works fine. But after half an hour or two days the bug reappears. How can I solve this? Thanks and excuse my poor english.

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• Intersection of player and mesh

  - by Will

  I have a 3D scene, and a player that can move about in it. In a time-step the player can move from point A to point B. The player should follow the terrain height but slow going up cliffs and then fall back, or stop when jumping and hitting a wall and so on. In my first prototype I determine the Y at the player's centre's X,Z by intersecting a ray with every triangle in the scene. I am not checking their path, but rather just sampling their end-point for each tick. Despite this being Javascript, it works acceptably performance-wise. However, because I am modeling the player as a single point, the player can position themselves so that they are half-in a cliff face and so on. I need to model them as as a solid e.g. some cluster of spheres or a even their fuller mesh. I am also concerned that if they were moving faster they might miss the test altogether. How should I solve this?

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• Do any database "styles" use discrete files for their tables?

  - by Brad

  I've been talking to some people at work who believe some versions of a database store their data in discrete tables. That is to say you might open up a folder and see one file for each table in the database then several other supporting files. They do not have a lot of experience with databases but I have only been working with them for a little over a half year so I am not a canonical source of info either. I've been touting the benefits of SQL Server over Access (and before this, Access over Excel. Great strides have been made :) ). But, other people were of the impression that the/one of the the benefit(s) of using SQL Server over Access was that all the data was not consolidated down into one file. Yet, SQL Server packs everything into a single .mdf file (plus the log file). My question is, is there an RDBMS which holds it's data in multiple discrete files instead of one master file? And if the answer is yes, why do it one way over the other?

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• Data transfer from 12.04 to 14.04 using same hostname?

  - by Mark

  I've been using my 12.04 server for a year and a half. I'd like to install 14.04 on a new drive and transfer all my data over once that is complete. I have 720GB of files to to deal with. 12.04 was setup using LVM. I'd like to use the same hostname. I'd prefer a clean install as opposed to an upgrade. What would be the best way go about this? Is it as simple as booting to the new install and mounting the 12.04 VG? I suppose I'd have to manually set up LVM on 14.04 if I want to use the same hostname.

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• Understanding how to go from a scene to what's actually rendered to screen in OpenGL?

  - by Pris

  I want something that explains step by step how, after setting up a simple scene I can go from that 'world' space, to what's finally rendered on my screen (ie, actually implement something). I need the resource to clearly show how to derive and set up both orthographic and perspective projection matrices... basically I want to thoroughly understand what's going on behind the scenes and not plug in random things without knowing what they do. I've found lots of half explanations, presentation slides, walls of text, etc that aren't really doing much for me. I have a basic understanding of linear algebra/matrix transforms, and a rough idea of what's going on when you go from model space - screen, but not enough to actually implement it in code.

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• Installed 11.10 on shared drive, when other partition mounted, HDD shown full

  - by Thebetpet

  I just partitioned a 500GB HDD 50%-50%. I installed ubuntu 11.10 on one half and copied a load of files onto the other. When I don't mount the other partition, it shows I have used 12.1GB and have about 240GB free. The second I mount the other partition, I can't copy any files over and get a disk full message. There is about 10-20GB Free on the other partition. Am I doing something wrong or is this a bug?

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• Storing Projects on Google Drive (Cloud)

  - by JamesKraw

  I've started using Google Drive for my cloud needs and backing up pretty much everything. I've got the app installed so it auto-sync's all my content in most things. My question is this, I am currently coding for iOS (although this applies to any coding project) and am split on storing my project files on Google Drive while using sync. My theory is that if I did use it, I'd never have to worry about system crashes or lost code before backups, but if I do use it it will be sync'ing a-lot and I thought there might be problems with it detecting changes and trying to sync for example half way through compiling. Bandwidth isn't an issue as I have fast connection and unlimited monthly allowance. Has anyone ever used this, or similar cloud-based sync'ing (dropbox etc) for this and knows whether it works or not or whether there are any potential problems etc.

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• Changing AdWords campaign structure

  - by AlxVallejo

  I've been running a campaign for about a year and a half now and the campaign has been setup by location. I'd have one campaign targeted for a specific region. And then I would duplicate the ad groups for each campaign. I have 5 ad groups targeting different areas of my business). This has worked reasonably well. It just occurred to me that it might easier if the campaign structure were reversed: 5 campaigns: each campaign focused on a different area of business and divided into 20+ adgroups (based on location). Will this screw up my campaign if I switch the structure? I have 10's for QS and I don't want to lose that!

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• Behaviors in Blend 4 (Silverlight TV #30)

  Thanks to all of you, last week we flew past 1,000,000 views of Silverlight TV! Were not stopping here, we have a ton in store for the second half of the year. But first, a quick thank you to all of you for tuning in and for all of our great guests who have brought their A-game to the show and helped make Silverlight TV the * most popular Silverlight show on the internet ;-) * disclaimer: I have totally not researched that ;-) Now back to this weeks episode which Adam looks very excited about!...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 only load up the terminal via grub then upgrade

  - by Parris

  So after the upgrade I made last night I can't load up the GUI properly. I have a feeling the upgrade died half way through. Grub is working. All the kernals are listed. That being said how can I: A) Make grub load into terminal only. No gui. B) How can I reinstall gnome? C) How can I try to install the upgrade for ubuntu again? It may or may not let me "do-release-upgrade". So what are my options here? Thanks!

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