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• Are there any alternative JS ports of Box2D?

  - by Petteri Hietavirta

  I have been thinking about creating a top down 2D car game for HTML5. For my first game I wrote the physics and collisions my self but for this one I would like to use some ready made library. I found out Box2D and its JS port. http://box2d-js.sourceforge.net It seems to be quite old port, made in 2008. Is it lacking many features of current Box2D or does it have major issues with it? And are there any alternatives for it?

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• Is deserializing complex objects instead of creating them a good idea, in test setup?

  - by Chris Bye

  I'm writing tests for a component that takes very complex objects as input. These tests are mixes of tests against already existing components, and test-first tests for new features. Instead of re-creating my input objects (this would be a large chunk of code) or reading one from our data store, I had the thought to serialize a live instance of one of these objects, and just deserialize it into test setup. I can't decide if this is a reasonable idea that will save effort in long run, or whether it's the worst idea that I've ever had, causing those that will maintain this code will hunt me down as soon as they read it. Is deserialization of inputs a valid means of test setup in some cases? To give a sense of scale of what I'm dealing with, the size of serialization output for one of these input objects is 93KB. Obtained by, in C#: new BinaryFormatter().Serialize((Stream)fileStream, myObject);

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• Ubuntu 11.10 momentarily freezes every couple minutes

  - by Jeff Welling

  I'm working on an Acer Aspire One D257 running Ubuntu 11.10, and every few minutes the laptop freezes up for a second or two, before becoming responsive again. This doesn't really present a huge problem, but when I'm trying to code all of a sudden vim stops responding for a couple seconds while I'm trying to modify my code, it's increasingly frustrating. The odd part is, if I play a movie in VLC at the same time, when vim pauses the video keeps playing just fine (VLC's priority is not modified). I'm wondering if anyone knows why this may be happening, or in lieu of that, how I might be able to track down the source of my frustrating pauses. Normally I would try using top, but the pauses are shorter than 2 seconds so nothing unusual shows up in top as consuming the CPU. Does anyone know how to troubleshoot intermittent repeating 1 second long pauses in vim?

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• Graphics card support

  - by Daryl

  Brand new user to Ubuntu and Linux. Quick question that I think already know the answer to: Does Ubuntu 11.10 have an updated driver for my graphics card? I was planning on being able to s-video out and watch videos on my tv like I could when I had Vista installed. daryl@daryl-Aspire-3050:~$ lspci -nn | grep VGA 01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS482 [Radeon Xpress 200M] [1002:5975] ATI Radeon Xpress 1100 is the actual card. As it is, Ubuntu is not recognizing when I plug an s-video cable into my laptop. I've narrowed it down to using what I think is a generic driver because all of the s-video enable commands I found and tried have failed.

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• Ubuntu (and any other linux os) not booting from cd or usb

  - by Amith

  I will tell you the whole story,one night when i was using KDE on Ubuntu 10.10 Kwin crashed then i shut down the os next day when i booted it the display came completely garbled and i went to safe graphics mode ,it worked and in reinstalled the Nvidia drivers and then restarted .Then immediatly, It said No init found Busybox XX.XX then I thought ill do a fresh install I inserted the ubuntu cd provided to me by Canonical.When i pressed 'try ubuntu without installing' instead of the graphic boot screen i saw.Ubuntu 10.10 in regular text and a progress bar few seconds after that the screen was flooded with error messages first alot of white then red.I then went to my win7 installation and saw a website which told me to find a Ext3 reader and format the ubuntu partition and the swap.I did that and when i restarted. GRUB configuration not found grub> Then it took my win 7 ERD and restored 7's bootloder Xp and 7 were working i put in the livecd again,Same error,Now usin my seven,Please help geeks,Ive even tried Knoppix,Fedora,Debiane.t.c they wont boot and i want to retain my win 7 and winxp partitions,I really miss linux.

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• New Java ME security app, Rapid Tracker, is now full version

  - by hinkmond

  Rapid Protect has updated it's Java ME security app to be the full version now instead of a dumbed down version that ran on feature phones. Now, that's progress! See: Full Rapid Tracker on Java ME Here's a quote: Rapid Protect, a leading company focused on mobile based safety, security and collaboration space announces major feature enhancements to its award winning "Rapid Tracker" mobile applications. In addition to many new features, it announced availability of Full Rapid Tracker application on J2ME non-smart feature phones. Hmmm... "on J2ME non-smart feature phones". I wonder if by "non-smart" they mean another word... Perhaps, "non-iDrone-Anphoid"? Hinkmond

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• Starting out with 2D cross-platform game development [closed]

  - by Aran

  I am wanting to challenge myself to build a simple game, that has a character and a randomly generated world. If I get anywhere with it I may perhaps I'll develop it into something more, but the key challenge I want to tackle is cross-platform. I'd also want to have a go at creating engine myself, doing lighting and other bits. Is it worth me using a system like Unity or do I go down a more custom route? The game I would like to make is a 2D game so whether that changes the tools I should use, it would be great to know as well. Supporting mobiles isn't something I am worried about at moment, just looking for Mac and Windows for time being. In future I'll consider other platforms if I get anywhere with the development. So if anyone has any recommendations for a language, engine or system to use would love to her your thoughts.Including pros and cons would be helpful and appreciated and if you can do comparisons that would be awesome as well!

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• Immutable design with an ORM: How are sessions managed?

  - by Programmin Tool

  If I were to make a site with a mutable language like C# and use NHibernate, I would normally approach sessions with the idea of making them as create only when needed and dispose at request end. This has helped with keeping a session for multiple transactions by a user but keep it from staying open too long where the state might be corrupted. In an immutable system, like F#, I would think I shouldn't do this because it supposes that a single session could be updated constantly by any number of inserts/updates/deletes/ect... I'm not against the "using" solution since I would think that connecting pooling will help cut down on the cost of connecting every time, but I don't know if all database systems do connection pooling. It just seems like there should be a better way that doesn't compromise the immutability goal. Should I just do a simple "using" block per transaction or is there a better pattern for this?

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• Lesser-known Github features that I'm missing out on with Bitbucket? [closed]

  - by Ghopper21

  I've been using Bitbucket for my small-team development projects, with the assumption that it is more-or-less a Github clone with pricing that is better for my situation and support for Mercurial (which I don't need). However, I'm seeing there are material-if-not-overwhelming differences, e.g. Github's appealing and useful branches page versus Bitbucket's overly simple branch drop-down list. This makes me wonder: what else am I missing out on? What are the lesser known Github features that folks like me using Bitbucket to save money are missing out on? EDIT: following closure, I've asked for advice on making this question productive over at meta. See here.

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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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• Testing web applications written in java

  - by Vinoth Kumar

  How do you test the web applications (both server side and client side code)? The testing method has to work irrespective of the framework used (struts, spring web mvc) etc. I am using Java for the server side code, Javascript and HTML for the client side code. This is the sample test case of what I am talking about: 1. When you click on a link, the pop up opens. 2. Change some value in the pop up (say a drop down value) and it gets saved in the DB. 3. Click the popup again, you get the changed values. Can we simulate this kind of thing using unit test cases? Is JUnit enough for this?

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• Failure to start grub with Wubi

  - by Marco Ceppi

  My laptop battery ran down and died while using Ubuntu 10.04 with Wubi. Upon recharge (and restart) selecting Ubuntu from the Windows Boot menu brings me to the typical prompt which says (and I paraphrase): Trying hd(0,0) on Disk... After that the screen flickers to white (for a split second) then black. No grub menu comes up (as I would expect) no cursor, no grub sh prompt. Nothing. I've tried switching TTYs to no avail. As there are no logs, I can't trouble shoot anything. I've run a check disk from windows (on the NTFS partition the root.disk is stored) with no luck. What is causing this failure to load grub (and, by association Ubuntu) - How can I restore my setup and get Ubuntu via Wubi working?

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• Fail to load Ubuntu11.10 onto ASUS PC 1015PX

  - by strugglingbadly

  My new ASUS 1015PX has the usual windows on the SDA1 partition - 100Gb, followed by SDA2 - 15Gb - with the recovery for windows, SDA3 with 183Gb for drive 'D' for windows. ASUS uses SDA4 - 19Mb for it's own use. 11.10 on an USB will load Ubuntu on a try basis and it seems OK, but every time I attempt an install, Ubuntu quickly shuts down and the restart process begins. Repeat endlessly. I've tried 10.4 netbook but that will not boot at all with the machine reporting - unknown keyword in config file gfxboot vesamenu.c32: not a COM32R image. I've gone through the above about 6 times each with the same results. I have also tried the above with the partitioning unchanged, and using gparted, with SDA3 formatted to ext4, windows 'D' reduced to 8Gb providing a 175Gb unallocated space - all to no avail. Please help

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• Mouse cursor lag after lock screen, 64 bit 12.04

  - by Bill Jones

  Recently I have noticed that when I return to my computer after it has been "locked" for a while, the mouse pointer has significant lag. The cursor position appears to only update a few times a second. Moving the mouse results in the pointer "following" the movement in a jerky kind of way, and then continuing for some fraction of a second after I have stopped using the mouse. Replacing the mouse has no effect. (I have two differently branded and constructed usb optical mice). Plugging either mouse into a different usb port has no effect. Once the problem was resolved by "suspending" the system, and then re-starting it with the power switch, but this does not work every time. So far, the only fool-proof fix is to shut the system down and re-start it (re-boot). I have tried this suggested fix. It had no effect.

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• If I create a link to a folder, how can I get from that linked folder to the "real" folder from within Nautilus?

  - by snowguy

  Say I have a folder several layers down in my documents folder. And I want easy access to it from my desktop. To do that I: Go to the parent folder in Nautilus. Right click on the folder's Icon and choose Make Link Cut / Paste the new "Link to ..." folder onto my desktop. Great. And mostly this works fine for me. But suppose I want to get to that folder's parent. I can of course get there using the original path--what Nautilus calls the "link path" which I can see in the properties of the folder. But that seems harder than it ought to be. How can I click on the folder and go to the link path directly?

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• What tools exist for designing layouts and pre-production templates for Rails 3 applications?

  - by rcd

  I develop Rails 3 applications, but prior to this, my background was a designer (typically making mockups in Photoshop and then breaking them down to HTML5/CSS3). Now, some great tools/templates exist for getting working layouts ready for Rails and other apps quickly, e.g., http://railsapps.github.com/rails-composer/. Many are using CSS Frameworks such as Twitter Bootstrap. I'd like to know whether there is a local app (for Mac) that can design layouts, much the way Dreamweaver would, but that are geared towards being utilized in a Twitter Bootstrap situation alongside Ruby (Rails) or Python apps, etc.

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• assistance recovering/reinstalling/installing ubuntu and win7

  - by razzrat

  New computer with Windows 7 installed, I defrag, shrink, re-boot from Ubuntu LiveUSB, go to gparted and look at partitions before installing Ubuntu....for some reason Win7 is still taking up 400G of my HD! I resized partition down with gparted, exit and yes of course I can't boot into Windows. When I go to install Ubuntu in new large unallocated space I get a blank screen at the point you are asked what kind of installation you want. I have Ubuntu 12.04 LiveUSB, Windows 7 re-installation disk and driver disks also. The HDD currently has 3 allocated partitions: 'diag' fat16, 'recovery' ntfs and 'OS' ntfs which has a red '!' next to it.

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• Material usage, one per model or per object?

  - by WSkid

  Is it better (memory, time (of developer), space) to use single model that is unwrapped and uses a single material or to break a model down into appropriate bits, each with their own smaller texture/material? Or does it depend on the target platform as to what is acceptable - ie PC vs tablet? An example: Say you have a typical house with a tiled roof. Model it, make sure everything is attached, unwrap the walls/roof so in your UV template the walls and roof would be in one texture file, side-by-side in say a 512x512 file. Model the roof/walls as separate objects, unwrap them individually and have two UV templates. You could then have a 256x256 file for each one.

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• Cannot see user desktop when I log in

  - by Jesi

  I am very new to Ubuntu. I recently got a new laptop running Windows 7. I am using Virtual Box and just installed the Ubuntu 12.10 ISO as a new Virtual Machine within Virtual Box. Everything seemed to install just fine and I even added the Guest Additions under Devices. The problem is that I cannot see the menus and my login information. The virtual machine says it is running; however, I do not have the Applications, Places, System, etc. tray to select from. Is there something I am supposed to do after logging in to get this? I entered my password and everything seemed fine, I just don't have those drop-down menus available... Thank You! Jesi

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• How to Create Forms in Microsoft Access 2010

  This tutorial will teach you how to create a form from a table in Access 2010, as well as a few added tips on how to insert additional fields and a drop-down menu into the form. The tutorial is basic, but it does lay a foundation that will increase your productivity and make life easier when it comes to Access 2010. Enough with the intro, let's get to the goods. From the navigation pane, select or highlight the table you want to use. Next, go to the Create tab and click on the Form icon. This will create a new form containing the fields from the table you originally selected. At ...

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• Working with logout dialog box - text error

  - by aaron.kyle

  I am having a problem with the shutdown dialog box for Ubuntu 12.04. If I am logged in as any user and press shutdown, I see the box with the question 'Are you sure..." and its usual options. Shutting down when I am not logged in as a specific user, however, displayed only square boxes. An image of this error can be found here: I believe this error started a few weeks ago when i accidentally changed the group for my root system directory, so it might be a permission thing or an improperly assigned group lingering somewhere. The trouble is that I don't know where the text for this box is stored, and no idea where to begin checking. Can any one point me in the right direction?

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• Operations on multiple overlapping layers not working

  - by Arun

  Hi I am developing a game in android just like Farmville by Zinga. In that game we have to place elements in the diamond shaped field so the don't overlap each other. Now I did coding for placing the field inside the farm field but I cannot stop the problem of overlapping of the farm field. I Am attaching the code that I have down for all this someone please help me.... try{ if(bm1.getPixel((int)initX,(int)initY)!=0){ if(bm1.getPixel((int)initX,(int)initY+20)!=0){ if(bm1.getPixel((int)initX-20,(int)initY)!=0){ if(bm1.getPixel((int)initX+20,(int)initY)!=0){ if(bm1.getPixel((int)initX,(int)initY-20)!=0){ c.drawBitmap(bm,initX-30,initY-20, paint); } } } } } }catch(Exception e) { Toast.makeText(getContext(), e.toString(), Toast.LENGTH_SHORT); }

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• Find angle for projectile to meet target in parabolic arc

  - by TheBroodian

  I'm making a thing that launches projectiles in 2D. Its projectiles are fired with a set initial velocity, and are only affected by gravity. Assuming that its target is within range, and that there aren't any obstacles, how would my thing find the appropriate angle at which to launch its projectile (in radians)? The equation for this is found here: Wikipedia: Angle Required to Hit Coordinate Sadly, I'm not a physicist (a.k.a. can't read smart people math) and am having a hard time reading its breakdown. If not only for the sake of anybody else that might read this other than myself, would anybody be kind enough to break the equation down into baby words please?

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• Web stalker has purchased a domain name that uses my personal name, web page is defamatory [closed]

  - by Deborah Morse-Kahn

  We have been unsuccessful in persuading a stalker's website host to release the domain name he purchased which is my own personal name, e.g., PERSONALNAME.com. You will find my name below in the signature area. Look for yourself. On the one page that this domain name leades to is dreadful and defamatory material. No attorney has felt it worth their time to chase this issue down, and we cannot afford to go to a national or international dispute resolution group to bring this issue to WHOIS. Worse, the stalker is amoral and a psychopath: he would just love the attention. We've even consider trying to find someone to illegally hack into the webpage to at least redirect the domain pointers to my own professional website. This issue has continued now for two years and is affecting my professional reputations as potential clients have looked for me online. Is there any remedy? Your help and advice would be greatly welcomed.

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• Unstable Wifi and Spontaneous Low-graphic Error with Pavilion DV4

  - by Constant Dean

  I've been having numerous problems with connectivity through WiFi. It had been working for a few days and now it doesn't. On top of that around 40% of every time I turn on the laptop it shows "System running in low-graphics" error and I'm unable to view the desktop (sometimes not even able to access terminal), therefore having to manually power-down until it finally works. I use Ubuntu 12.10. nm-tool NetworkManager Tool State: connected (global) - Device: eth0 [Wired connection 1] ------------------------------------------- Type: Wired Driver: r8169 State: connected Default: yes HW Address: 84:34:97:6B:2E:D7 Capabilities: Carrier Detect: yes Speed: 10 Mb/s Wired Properties Carrier: on IPv4 Settings: Address: 192.168.1.10 Prefix: 24 (255.255.255.0) Gateway: 192.168.1.1 DNS: 192.168.1.1 DNS: 68.237.161.12 - Device: wlan0 ---------------------------------------------------------------- Type: 802.11 WiFi Driver: rt2800pci State: unavailable Default: no HW Address: 68:94:23:50:A5:D9 Capabilities: Wireless Properties WEP Encryption: yes WPA Encryption: yes WPA2 Encryption: yes Wireless Access Points

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