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• Spawning bullets on command in Box2D

  - by recharge330

  I'm making a simple bullet hell game but I can't figure out how to get my character to shoot. Lets say I have bulletBody and shipBody, how would I continually spawn bulletBodies using the shipBody coordinates. I've tried a function that uses an array of b2bodies and just assigns them the bodydef and fixture but that causes the game to crash. C++ sample code would be best but any help is appreciated. EDIT: It looks like any reference to my b2World in a function will cause the game to crash. How do I declare the bodies without using a b2World as an argument in the function.

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• Question about creating a sprite based 2-D Side Scroller with scaling/zooming

  - by Arthur

  I'm just wondering if anyone can offer any advice on how best to go about creating a 2-D game with zooming/scaling features akin to the early Samurai Showdown games. In this case it would be a side scroller a la Metal Slug, the zooming would come in as more enemy sprites entered the screen, or when facing a large sized boss. A feature that would be both cosmetic as well as functional to the game. I've done some reading and noticed a few suggestions that included drawing different sized sprites, a standard size and zoomed out size. Any thoughts? Thanks for your time.

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• should singleton be life-time available or should it be destroyable?

  - by Manoj R

  Should the singleton be designed so that it can be created and destroyed at any time in program or should it be created so that it is available in life-time of program. Which one is best practice? What are the advantages and disadvantages of both? EDIT :- As per the link shared by Mat, the singleton should be static. But then what are the disadvantages of making it destroyable? One advantage is it memory can be saved when it is not useful.

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• Include in service layer all the application's functions or only the reusable ones?

  - by BornToCode

  Background: I need to build a main application with some operations (CRUD and more) (-in winforms), I need to make another application which will re-use some of the functions of the main application (-in webforms). I understood that using service layer is the best approach here. If I understood correctly the service should be calling the function on the BL layer (correct me if I'm wrong) The dilemma: In my main winform UI - should I call the functions from the BL, or from the service? (please explain why) Should I create a service for every single function on the BL even if I need some of the functions only in one UI? for example - should I create services for all the CRUD operations, even though I need to re-use only update operation in the webform? YOUR HELP IS MUCH APPRECIATED

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• OpenGL ES 2.0. Sprite Sheet Animation

  - by Project Dumbo Dev

  I've found a bunch of tutorials on how to make this work on Open GL 1 & 1.1 but I can't find it for 2.0. I would work it out by loading the texture and use a matrix on the vertex shader to move through the sprite sheet. I'm looking for the most efficient way to do it. I've read that when you do the thing I'm proposing you are constantly changing the VBO's and that that is not good. Edit: Been doing some research myself. Came upon this two Updating Texture and referring to the one before PBO's. I can't use PBO's since i'm using ES version of OpenGL so I suppose the best way is to make FBO's but, what I still don't get, is if I should create a Sprite atlas/batch and make a FBO/loadtexture for each frame of if I should load every frame into the buffer and change just de texture directions.

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• How do open-source projects grow?

  - by dan_waterworth

  I know of lots of software that is open-source. For at least some of it, someone, somewhere must have written the first version alone. How does good open-source software become well known? I'm most interested in the first steps. How does software written by one person gain its first new contributors? I'm looking for practical advise. I've started a project here, called aodbm. What steps can I take to give it the best possible start?

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• Hurricane Season 2010 Starts

  - by Mark Treadwell

  Here we are at the start of another hurricane season.  As with past years, I have been preparing.  Last year I had the house painted with a high-quality paint, giving the stucco its best waterproofing possible.  I have a few cracks to patch with elastomeric patching material.  I will paint it to match the house later.  I also need to clean out the anchors for the lower angle brackets and reattach them.  I had removed the brackets for painting. You can read all my past hurricane entries here.  The predictors are promising a busy season.  We have heard that one before, so I put little credence in long range press releases.  Other than that we are pretty much ready.  I have a few new plans I will blog about later, but for now we get to listen to our daily thunderstorms outside.

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• What resources about business should an internal IT department programmer be familiar with

  - by Badger

  I am developer / analyst in an internal IT department at a medium sized business. I have to deal with business people all the time and many of the things I create can have profound impacts on the business. I am starting to regret not taking any business classes in college because I don't understand the first thing about running a business so I don't always understand what people are wanting, the best I can do is "think through it". Does anyone have suggested methods of learning this stuff, maybe some resources. And please don't just say to ask people who work here. I have tried that before and I get no where.

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• usb drive filesystem?

  - by purbleguy

  So, school is approaching quickly, and one of the things on my supply list is a usb drive. Now I'm asking myself what filesystem to use. After some research, I found ext4 to be the most stable drive filesystem. But, I also found that Windows (The OS used by every computer in my school) can't read ext4 formatted drives without special drivers, and I'm sure the school wouldn't be too happy with me having to install the windows ext4 drivers on every computer I use with my usb. So, my question is, Should I use fat32, one of the ext filesystems (2, 3 or 4 would work) or NTFS, I have an ubuntu laptop, a Mac desktop, and of course the school computers I use are Windows, so which would be the best filesystem for my usb.

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• Grouping IP Addresses based on ranges [on hold]

  - by mustard

  Say I have 5 different categories based on IP Address ranges for monitoring user base. What is the best way to categorize a list of input IP addresses into one of the 5 categories depending on which range it falls into? Would sorting using a segment tree structure be efficient? Specifically - I'm looking to see if there are more efficient ways to sort IP addresses into groups or ranges than using a segment sort. Example: I have a list of IP address ranges per country from http://dev.maxmind.com/geoip/legacy/geolite/ I am trying to group incoming user requests on a website per country for demographic analysis. My current approach is to use a segment tree structure for the IP address ranges and use lookups based on the structure to identify which range a given ip address belongs to. I would like to know if there is a better way of accomplishing this.

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• ubuntu 11.04 compiz crash

  - by iman

  first of all, i have to say i am new in using linux! i have installed ubuntu 11.04 and i wanted chenged its interface by macbuntu 10.10 and i've done it but the problem is that genie effect is not actived until now so i googled in many forums and i faund out that i must change my compizconfig manager! i've done it but when i try to use this command "compiz --replace"! my laptop crash that means i could not move any windows or terminal! i could not miniminze or close them??! what i am supposed to do for solviling this crash??? best regards, iman

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• Ubuntu not booting properly

  - by user86998

  I just bought an Asus EeePC with Ubuntu 12.04 installed on it. After turning it on and performing the updates it didn't boot properly and showed a screen saying it was working on low graphics mode, but I wasn't able to get to the GUI. After some searching, I tried renaming xorg.conf.failsafe to xorg.conf using the mv command. After rebooting I got to the Ubuntu GUI but it was stuck to a 800x600 resolution, track pad not working and not detecting my Wi-Fi. After rebooting again it goes straight to console tty1. I'm completely new to Ubuntu and Linux. If some one can give help? I think the best would probably be to reinstall it from scratch, but I don't know how.

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• ASP.NET Website Security Tips and Tricks

  This is a tutorial on how to secure your ASP.NET Mono website. Securing an ASP.NET website that runs in Mono is very different from securing an ASP.NET website hosted in a Windows environment because an ASP.NET Mono website runs on a non-Windows server such as Apache or Lighttpd and on an operating system such as Linux Unix. Thus the principles of securing a website in Apache server can be applied to securing an ASP.NET that runs in Mono.... Comcast? Business Class - Official Site Learn About Comcast Small Business Services. Best in Phone, TV & Internet.

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• Preparing to release code as open-source

  - by Raphael

  I have developed a fully functional tool which I would like not only to share with anyone interested but also get support from the community. This tool is cross-platform, written in C++ with Qt, the code is well commented but I still lack any documentation. There are also some small issues and improvements to be made before I can call it a stable, final version. What are the first steps that I have to take to release code as open-source and attracting people interested in contributing? This is my first serious attempt to release open-source code and I really don't know where to start. Should I just push it to Github put together a small wiki and pray for the best?

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• Any recommendations for a domain buying negotiating service? [closed]

  - by Saunt Valerian

  The best domain for my niche and related is owned by a guy in San Fransisco, and I want to buy the domain from him but I don't want to deal with him directly (even though he has contacted me in the past). I need to find an intermediary company that can handle the negotiation for me. I don't expect to have to pay much since the guy has been squatting on it for more than 15 years and according to the Internet Wayback Machine it has never actually been used for anything at all - he has never added any value to it. It kind of irritates me that such a good domain has been sitting in this guy's closet gather dust for 15 years. I know that GoDaddy has a domain buying negotiating service (and the domain is registered through them, which may make it easier), but I really, really do not want to do business with GoDaddy if I don't have too. Do any of you know of other firms that deal with this sort of thing?

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• What language(s) do I need to learn in order to develop an application like this?

  - by Josh

  I have an idea for making a web application. Ideally this application would have products which prices are increased each time a Retweet of the product at hand is made. Kind of like bids with tweets. Unfortunately my web development knowledge is very scarce. I know just basic HTML, virtually no CSS and that's it. I'm kindly asking for your insights on what you think would be best for making a web app like this. I have no good idea of where to start or what I need to get going. Your inputs are greatly appreciated. Thanks in advance.

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• Force Xorg to run in specific resolution

  - by Z9iT

  From my past experience (using Win-Xp), this particular monitor works only on 60Hz , Best resolution being 1024*768. I have "installed n configured" Ubuntu 12.04 Minimal (on USB stick) so that most of the time terminal is used, however whenever theirs a need to enter GUI I may issue startx command to go into gnome. However the problem is that on this particular system, issuing this command poses problem for its default refresh rate don't synchronize with the monitor. The display keep on flickering and utterly unreadable. It is visible that gnome has been loaded and default wallpaper and desktop items are visible. But the problem is due to refresh rate different than 60Hz. I am looking for a command attribute to startx command which will force the refresh rate to 60Hz and resolution preferably to 1204*768

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• Collision representation in game overworlds

  - by Akroy

  I'm implementing a 2D overworld where one can walk through an area that is not tile based. I was wondering the best way to implement collisions. In the past when I've done similar things, I've used one image (or set of images) to show an elaborately drawn world and then a second binary image that does nothing but differentiate "wall" and "not wall". Then, I'd use the first for all drawing to the screen, but the second for collision detection. Having another image of the same size to represent collisions seems like lots of overhead. Is there a better way to handle this? (I'm currently using C++ with SDL, although I'm more interested in general concepts)

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• How can I change the folder icon?

  - by Jakob

  I know how to change an icon this way. What I'm looking for is an equivalent to changing the icon for an application in the launcher, i. e. the Home folder, via gedit ~/.local/share/applications/nautilus-home.desktop That way you can set an icon type, which is helpful when you later want to change the icon set resp. theme or when you want the best resolution for each size of the icon. So, I know how I can do this for applications in the launcher - but how can I realize this for icon folders in Nautilus? (In which file these settings are stored and editable whith i. e. Gedit?)

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• When profiling a function for time use, what information is desirable?

  - by AaronMcSmooth

  I'm writing a program similar to Python's timeit module. The idea is to time a function by executing it anywhere from 10 to 100,000 times depending on how long it takes and then report results. I've read that the most important number is the minimum execution time because this is the number that best reflects how fast the machine can run the code in question in the absence of other programs competing for processor time and memory. This argument makes sense to me. Would you be happy with this? Would you want to know the average time or the standard deviation? Is there some other measure that you consider more important?

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• ubuntu 12.04 can't find root partition (it doesn't look for btrfs partitions) end up with kernel-panic [closed]

  - by zalesz

  Possible Duplicate: There's an issue with an Alpha/Beta Release of Ubuntu, what should I do? I'm running Ubuntu 12.04 from kernel v. 3.2.0-17 with all partitions formatted as BTRFS. It was everything ok till kernel 3.2.0-18/19. Now system don't load, after trying to run it with recovery there is a msg that kernel panic occurred cause there is no partition with ext3/4 and some other partitions but I don't see any btrfs alike type. Any ideas how to fix it? Best

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• How to manage enemy movement and shoot in a shmup?

  - by whatever

  I'm wondering what is the best (or at least a good) way of managing enemies in a shoot-em-up. Basically, what I'd do would be a class that manages displaying and updating positions of all the enemies. But how to create good deplacements for enemies? A list of where-to-go points? gravitating around some fixed points (with ponderation, distance evaluation etc.)? Same question for the shoot patterns? Can you please put me on a track?

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• Webmatrix fails to connect PHP website to MySQL

  - by Roni

  I downloaded the latest versions of Webmatrix and MySQL. I downloaded a PHP-MySQL Connector: http://dev.mysql.com/downloads/connector/php-mysqlnd/ In the "Databases" Workspace I pressed "New Connection" button and choose "MySQL Connection" In the Dialog box I filled-in all connection details -- It looks like the database was added. But then when I double-click on the database, I get a short error message saying it cannot connect. I tried everything, searched the web... I'm sure it's a very simple question, so please whoever can help I'll be grateful. I think best solution for me would be if someone could please just give me a link to download of: Webmatrix,MySQL,Connector; and instructions on how to install and then how to connect. This would be the safest way to help me.

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• Installed Ubuntu on 12.04 on my MacBook Air now I want to expand the partition

  - by Josh

  I recently installed Ubuntu 12.04 on a 40GB partition on my Mac Book Air (5,2). I'm having so much fun with it, I'm ready to make the switch permanently and replace it as the primary OS on my machine. I realize I can wipe the machine and start from scratch, but I'm looking for alternatives since I like my current setup. Options are... Create a backup and restore the back up to a larger partition (Assuming I should keep the default OS X install for firmware updates) Create a backup and restore to the entire drive (create a restore usb stick for OSX - not sure if that's possible?) re-size my current partition and wipe the OS X partition and either, A. re-install OS X (similar to option 1) or B. create the USB key (similar to option 2). Thoughts? Any other suggestions? Would also like thoughts on the "optimal" or "best practice" for partitioning Ubuntu. Thanks!

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• Why is the font spacing on some websites broken?

  - by user950731

  I am using Ubuntu 12.04 on a Dell Studio 15 and so far am really impressed. I could not find a solution for my problem by googling. The fonts on some websites do not have proper spacing. they overlap and are very hard to read that way. I am using the Ubuntu standard fonts and have not changed them after installing. Here is a screencap that shows my problem. The problem occurs in Firefox and Chrome the same way, and on the same websites. Thanks for your help. Best regards el

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