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• Simple 2D Flight Physics with Box2D

  - by MarkPowell

  I'm trying to build a simple side scroller with an airplane being the player. As such, I want to build simple flight controls with simple but realistic-feeling physics. I'm making use of cocos2D and Box2D. I have a basic system working, but just can't get the physics feeling correct. I am applying force to the plane (which is a b2CircleShape) based on the user's input. So, basically, if the user pushes up, body_->ApplyForce(b2Vec2(10,30), body_->GetPosition()) is called. Similarly, for down -30 is used. This works and the plane flys along with up/down causing it to dive or climb. But it just doesn't feel right. There is no slowdown on climbs, nor speed up during dives. My simple solution is far to simple. How can I get a better feel for a plane climbing/diving? Thanks!

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• Ubuntu 14.04 Unity not functioning, no launcher

  - by user216962

  Yesterday I turned my computer to find that the launcher was missing. In addition, I could not using ctrl-alt-t would bring up a blank white screen. The only terminal could be found by clicking ctrl-alt-f1. I used ccsm to turn on Unity. Unity panel service was working. I installed tweak tool. I did all the troubleshooting I could find related to this subject. Nothing would work. I ultimately reinstalled Ubuntu 13.10. Also, I do not have an nvidia graphics card. I have an intel integrated graphics controller. Some of the troubleshooting I tried were found: Unity doesn't load, no Launcher, no Dash appears ubuntu 14.04 unity desktop without panel and launcher how to fix: no unity, no launcher no dash in ubuntu 14.04 http://ubuntuforums.org/showthread.php?t=2008891

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• Is Unity's Random seeded automatically?

  - by Lohoris

  I seem to recall Unity's Random is automatically seeded; checking the documentation it doesn't say it outright, but a certain interpretation of their words might seem to imply it. The seed is normally set from some arbitrary value like the system clock before the random number functions are used. This prevents the same run of values from occurring each time a game is played and thus avoids predictable gameplay. However, it is sometimes useful to produce the same run of pseudo-random values on demand by setting the seed yourself. (emphasis added)

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• Intro to Sessions in ASP.Net

  Sessions are used to pass the value from one page to another with no effort from the user. With a session, if the user inputs values on the original page and you need to access them on another page, you can retrieve the values stored in the session without making the user submit those values again. Sessions are important to any user-related authentication (if you're using the https protocol), user-related validation and customization of visitor experiences in your website. This tutorial will use Visual Basic to illustrate ASP.NET sessions, though the code can be converted to equivalent C# code...

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• How to get data from a bluetooth device that is not visible?

  - by jonobacon

  I just bought a Fitbit One which includes Bluetooth 4.0 to sync with mobile devices. Currently libfitbit does not include support for bluetooth syncing, so I would like to see how much data I can get out of the device that I can pass onto the libfitbit devs so that they can explore bluetooth support. I ran: hcitool scan which unfortunately did not return any devices. I also used blueman to scan for devices and nothing was found either. Therefore I am assuming that the bluetooth radio in the device is not visible by default. Can anyone recommend any ways to get data out of the device that could be helpful?

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• Is there anywhere where I can get Ubuntu installed for me?

  - by user3911336

  I have tried for days to install Ubuntu on my lenovo ideapad z510 and I feel like giving up. I really feel like I will like Ubuntu, but for some reason I always have some king of problem. I really don't want to give up on Ubuntu, but I don't want to brick my laptop either. Is there anywhere I can have Ubuntu installed for me? I have tried messing with my bios, used a DVD and a USB, but no luck. Thanks in advance! Edit: I am based in Warwick, RI in the USA. I don't want to run Ubuntu in windows.

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• Profiling and containing memory per system

  - by chadb

  I have been interesting in profiling and keeping a managed memory pool for each subsystem, so I could get statistic on how much memory was being used in something such as sounds or graphics. However, what is the best design for doing this? I was thinking of using multiple allocators and just using one per subsystem, however, that would result in global variables for my allocators (or so it would seem to me). Another approach I have seen/been suggested is to just overload new and pass in an allocator for a parameter. I had a similar question over on stackoverflow here with a bounty, however, it seems as if perhaps I was too vague or just there is not enough people with knowledge in the subject.

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• Why can't get past the user info screen when installing 10.10?

  - by Faceless

  I have a Dell Inspiron 1318 (07-08?) with an Intel Cored 2 Duo Processor and 3 GB of RAM. I can run Ubuntu 10.10 from the disk, but I've tried to install it three times with no success. As the files are installing, the program asks me to enter my user information. I'm fine through the time zone screen, and fine through the keyboard screen. But when it asks me to set my used name and password, the "next" button stays ghosted out no matter what I enter. Eventually, the installation gets to the point where it says it's waiting for me, but no matter what I do I can't get the "next" button to click. I'm a complete newbie, and I've been stuck at the same spot three times. If anyone has any idea what's going wrong, I'd love to hear about it.

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• When to use an Array vs When to use a Vector, when dealing with GameObjects?

  - by user32465

  I understand that from other answers, Arrays and Vectors are the best choices. Many on SE claim that Linked Lists and Maps are bad for video game programming. I understand that for the most part, I can use Arrays. However, I don't really understand exactly when to use Vectors over Arrays. Why even use Vectors? Wouldn't it be best if I simply always used an Array, that way I know how much memory my game needs? Specifically my game would only ever load a single "Map" area of tiles, such as Map[100][100], so I could very easily have an array of GameObjectContainer GameObjects[100][100], which would reserve an entire map's worth of possible gameobjects, correct? So why use a Vector instead? Memory is quite large on modern hardware.

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• Build & Deployment Guide for Service Bus Relay Project

  - by Michael Stephenson

  Ive recently published a sample guide based on a real-world project where we implemented an on-premise WCF routing solution to connect SAAS applications to our on premise line of business applications. The guide will discuss: How we configured and setup the infrastructure How we setup the on-premise server to listen to the service bus What software we used How we configured Windows Azure This contains some useful contextual information around the reference scenario and hopefull this will be very useful to others undertaking similar projects. Ive also included this on the technet wiki page for Windows Azure Service Bus resources: http://social.technet.microsoft.com/wiki/contents/articles/13825.windows-azure-service-bus-resources.aspx

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• Broke my sudoers password, how do I reset it without using sudo?

  - by Eric Dand

  I thought it would be a good idea to finally take the password off my little netbook since it has never actually been of any use, and has mostly just slowed down . But when I went to change my password, there wasn't even an option to make it blank, and any attempt to make it a few easy characters was met with "Password too weak". So I did what any good geek would do and popped open the terminal, read the manual entry for passwd and quickly used the -d option to remove the password from my account. It all went well for a couple days (I even managed to also make my keychain password blank) until I tried to update the thing. My sudoers password is not blank, and it's not my old password. I have no idea what it is. How do I reset it (or even better, make it blank) without the use of the sudo command?

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• mail server crash

  - by waxx

  i have a mail server running ubuntu 12.04. my server has a main 200gb hdd as the /, and other scsi hdd. as far as i recall, i used the 5 scsi harddrives for different mount points.. 1 hard drive is /swap, 1 hard drive is /usr ...the other is /boot, i cant recall the other 2.. just yesterday, my /usr drive died... and it wont let me boot into the server.. ive tried to skip mounting the /usr with the S option when i go to recovery drive, but the server still wont boot up. i need help badly because the server needs to be up and running ASAP. thank you for all the help.

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• Are there references discussing the use parallel programming as a development methodology? [closed]

  - by ahsteele

  I work on a team which employs many of the extreme programming practices. We've gone to great lengths to utilize paired programming as much as possible. Unfortunately the practice sometimes breaks down and becomes ineffective. In looking for ways to tweak our process I came across two articles describing parallel pair programming: Parallel Pair Programming Death of paired programming. Its 2008 move on to parallel pairing While these are good resources I wanted to read a bit more on the topic. As you can imagine Googling for variations on parallel pair programming nets mostly results which relate to parallel programming. What I'm after is additional discussion on the topic of parallel pair programming. Do additional references exist that my Google-fu is unable to discern? Has anyone used the practice and care to share here (thus creating a reference)?

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• VNC Server not responsive after a few days

  - by assylias

  I am new to Ubuntu (11.10) - I installed Ubuntu on a box which has no screen and no keyboard. I connect to that box via tightvncserver. The box is mostly used as a file and media server (i.e. samba + XBMC). So far so good. I can connect via VNC to the box and take control of it. But after a few days, when trying to connect via VNC, I don't get a response. The media server is still on, ping is fine, but VNC is down. The only solution I have found is to plug a screen and keyboard and reboot. I am not sure how to diagnose the problem (maybe some log files?) or if this is just a configuration issue. Any help appreciated.

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• Unity: Nautilus folder opens in background

  - by JJD

  I am used to open a folder from the keyboard with a shortcut. The alternatives are: Use Unity Dash with the shortcut SUPER + F to open the Dash File Lens Open Kupfer with the configured shortcut (CTRL + ALT + SPACE, in my case) Then I type the name of the folder and press ENTER if it is selected. However, the window that opens up is not active but in the background. I have to press ALT + TAB to bring it into foreground. I use Ubuntu Precise (12.04.). Question: How can I configure Ubuntu, Unity, Nautilus so newly opened windows become foreground immediately? Edit: This behavior only happens when another application is already open such as GEdit. It does not happen when the only other selectable entity is the Desktop.

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• What''s easy extensible technique to store game data?

  - by Miro

  I'm looking for library/technique for storing my game resources - levels, object (effects,world info), items(price,effects,...), NPC(visual info, behavior), everything except graphics/audio stuff. I've seen lua used for Awesome WM configuration. protobuf looks good, but it seems to be designed for network communication. I've tried to write my own parser, but as the project grows it's more and more harder to manage it and catch all the bugs. My requiremets: stability easy extension of data without need to convert older versions to newer good(don't have to be the best) performance of loading not much coding not XML!

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• is it safe to use jQuery and MooTools together?

  - by user1179459

  I just need to know is it safe to use jQuery and MooTools Together in one web framework? I am not trying create application using both of them, but I am in a situation where I need to modify mootool based application framework, so I am used to jquery, I don't want to waste my time learning mootools and I think jquery is better than the mootools in many contexts like number of applications, plugins etc. so questions are is it safe to use mootools and jquery in one framework? will there be cross browser issues? how robust the application will be when using both?

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• Function that requires many parameters

  - by user877329

  I have a problem related to this: Are there guidelines on how many parameters a function should accept? In my case, I have a function that describes a rounded rectangle. The caller specifies An integer which determines how the rectangle should be merged into previously created shapes An Anchor, which is a point that is used for alignment (right, left, top, bottom etc). (0,-1) means that position (next parameter) describes the top, middle point of the rectangle. The position of the rectangle Width and height Corner radius Should I use Parameter Object pattern in this case? It is hard to see how these parameters are related

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• Importance of frequency of keywords for SEO [closed]

  - by Calle

  Possible Duplicate: keyword stuffing in SEO I've seen a few posts on here and elsewhere that talk about the amount of unique keywords used, or aimed, for in a text. But how important is the frequency of keywords for SEO optimized copy, the higher the better? Is there a certain percentage to aim at? For example, I currently have copy aimed for a specific keyword. The rate of this keyword is that it makes up 2% of all words. Is this too low? Too high? The higher the better?

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• Typewriter Sounds

  - by Mr. Typing Sounds

  Since I switched to Ubuntu 12.04 I'd only missed one thing. A program which could launch typewriter sounds while typing. For instance, in Windows I used this: http://www.colorpilot.com/soundpilot.html for a long time. I learned then that this writing program: http://gottcode.org/focuswriter/ had the sounds but only for the program itself. However, sometimes I'm writing an email, writing on the web or doing more complex writing tasks in LibreOffice - all places where these long missed typing sounds don't apply. Does any of you know of any plans in the community of the sound bit - typing sounds - as an independent program or applet to be fetched in the Ubuntu Software Center soon? The Rhythm Of Creative Writing would really be helped then! ;-)

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• Subfolder non-www redirect

  - by Zealotry

  Is there a way to redirect a sub folder to no-www? What I use is: RewriteEngine On RewriteBase / RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC] RewriteRule ^(.*)$ http://%1/$1 [R=301,L] but this only redirects the www.example.com to example.com. I would like to redirect: www.example.com/home/ to example.com/home/ www.example.com/home/whatever URL to example.com/home/whatever URL. I have tried this: RewriteEngine on Options +FollowSymlinks -MultiViews RewriteCond %{HTTP_HOST} ^(www\.)?example\.com$ [NC] RewriteRule ^$ http://example.com [R=301,L] RewriteCond %{HTTP_HOST} ^www\.example\.com$ [NC] RewriteCond %{REQUEST_URI} !^/home/ [NC] RewriteRule ^(.+)$ http://example.com/$1 [R=301,L] This does not work, either. I can't really figure it out. Any help appreciated! ANSWER I figured it out and I will post it for others to see, if having the same issue. In the sub folder directory's .htaccess used the following: RewriteCond %{HTTP_HOST} ^(www\.example\.com)?$ RewriteRule ^(.*)$ http://example.com/subfoldername/$1 [R=301,L]

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• Low CPU/Memory/Memory-bandwith Pathfinding (maybe like in Warcraft 1)

  - by Valmond

  Dijkstra and A* are all nice and popular but what kind of algorithm was used in Warcraft 1 for pathfinding? I remember that the enemy could get trapped in bowl-like caverns which means there were (most probably) no full-path calculations from "start to end". If I recall correctly, the algorithm could be something like this: A) Move towards enemy until success or hitting a wall B) If blocked by a wall, follow the wall until you can move towards the enemy without being blocked and then do A) But I'd like to know, if someone knows :-) [edit] As explained to Byte56, I'm searching for a low cpu/mem/mem-bandwidth algo and wanted to know if Warcraft had some special secrets to deliver (never seen that kind of pathfinding elsewhere), I hope that that is more concordant with the stackexchange rules.

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• Reduce boot time between grub menu and login screen

  - by Sudheer

  I use Ubuntu 14.04 LTS version which used to boot fast at beginning but not i loads very slow. I searched for this but can't find suitable answers. so i want to reduce my boot time which is now around 1min 12sec (boot chart) overall but i noticed its taking a longtime after grub menu and before login screen. A Blank screen appears after grub waiting... then login screen appears. I want to know a way to reduce that blank screen time(or if possible remove) and get login screen as fast as possible. I already removed several of my startup applications. Getting desktop after log-in is fast. I don't want to remove unity and install light desktop envinorments like Xfce and Lxde. Here is my boot-chart image Thanks in advance

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• Embeding a generic google search with autocomplete - not a custom site search

  - by picxelplay

  Most people's home page is google.com. My homepage is just a custom html page hosted on my computer. I do this because I am a web developer, and I have several projects that I work on a one time, so I like to have quick links to all of them. On that page I usually just have a Link to google.com for when I want to search. But below all of my quick links, I want to add a google search box (with Autocompletions). I first used a simple iframe to embed google.com into the page, but then my search results were confined to that iframe. I wanted to search for something, then my results would open in a new tab. I then came across this code snippet but it doesn't have Autocompletions: http://www.refactory.org/s/google_search/view/2 How can I add Autocompletions to this? Or is there a better way of doing it? Thanks in advance for any advice

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• Wake-on-lan under Ubuntu 12.04

  - by iUngi

  I would like to setup the wake-on-lan, the two PCs are connected through a switch. Here is the configuration of the eth0, in the BIOS I couldn't find any information regarding the wake-on-lan. Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Advertised pause frame use: Symmetric Receive-only Advertised auto-negotiation: Yes Link partner advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Link partner advertised pause frame use: Symmetric Link partner advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: MII PHYAD: 0 Transceiver: internal Auto-negotiation: on Supports Wake-on: pumbg Wake-on: g Current message level: 0x00000033 (51) drv probe ifdown ifup Link detected: yes After I shut down the PC, I used different tools to send out the magic package, but nothing happens. Any suggestion?

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