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• Tunnels in pseudo 3D racing game

  - by Nicholas

  How would one go about doing tunnels in a pseudo 3D racing game ? The main problem I have at the moment is perspective - I cant think of a way, beyond having to Z sort the sprites and tunnel coordinates, so that vehicles are displayed in front of the tunnel entrance and somehow block the display when out of site. I would like my tunnels to be used on both flat, curved and hills and slopes. The tunnel enterance/exit is made up of 3 separate graphics, (left, right and top), whilst inside the tunnel it is just one line graphic along the top (the idea being its supposed to be a set distance above the current vertical road position). As you can see from the picture, the vehicles are still being rendered whilst in the tunnel. I've converted the Code Incomplete road system to GLBasic.

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• What are the steps taken by this GLSL code?

  - by user827992

  1 void main(void) 2 { 3 vec2 pos = mod(gl_FragCoord.xy, vec2(50.0)) - vec2(25.0); 4 float dist_squared = dot(pos, pos); 5 6 gl_FragColor = (dist_squared < 400.0) 7 ? vec4(.90, .90, .90, 1.0) 8 : vec4(.20, .20, .40, 1.0); 9 } taken from http://people.freedesktop.org/~idr/OpenGL_tutorials/03-fragment-intro.html Now, this looks really trivial and simple, but my problem is with the mod function. This function is taking 2 vec2 as inputs but is supposed to take just 2 atomic arguments according to the official documentation, also this function makes an implicit use of the floor function that only accepts, again, 1 atomic argument. Can someone explain this to me step by step and point out what I'm not getting here? It's some kind of OpenGL trick? OpenGL Math trick? in the GLSL docs i always find and explicit reference to the type accepted by the function and vec2 it's not there.

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• Learning C++ but wanting to develop iOS Apps

  - by DiscreteGenius

  I'm a computer engineering student and taking my second programming class. I'm learning C++ using "C++ Primer Plus" 5th edition by Prata. I want to develop for iOS. I understand the main language for Xcode is Objective-C. Am I hurting myself by learning C++ before any other language (notably before my desired lang Objective-C)? There's got to be a reason the university requires C++ to learn as a basis language. Please offer any helpful guidance or how I should go about this. Thanks//

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• LibGDX - SpriteBatch's .draw() method requiring float[]

  - by just_a_programmer

  Please excuse my lack of knowledge with LibGDX, as I have just started learning it. I am going through some simple tutorials, and in one of them, I draw a string onto the screen like so: // the following code is in the main file in the core project folder: // this is in the create() method: private SpriteBatch batch; batch = new SpriteBatch(); // this is in the render() method: batch.draw(batch, "Hello world", 200, 200); I am getting an error saying: The method draw(texture, float[], int, int) in the type SpriteBatch is not applicable for the arguments (SpriteBatch, int, int) So, LibGDX wants a float array to draw instead of a string? Thanks in advance.

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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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• Unable to Install Guard

  - by Dillmo

  I've seen Guard and it's usefulness in web development and would like to install it. Naturally, I expected to be able to use sudo gem install guard to do so (yes, it is a Ruby Gem). However the installation errors out. Here is what I'm getting: Building native extensions. This could take a while... ERROR: Error installing guard: ERROR: Failed to build gem native extension. /usr/bin/ruby1.9.1 extconf.rb /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError) from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from extconf.rb:4:in `<main>' Gem files will remain installed in /var/lib/gems/1.9.1/gems/ffi-1.9.3 for inspection. Results logged to /var/lib/gems/1.9.1/gems/ffi-1.9.3/ext/ffi_c/gem_make.out Does anyone know how I can fix this? Thanks for any help.

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• Chromium and Google Chrome downloading

  - by user286166

  Well, I have sincerely enjoyed having Google Chrome on my linux machine, and have never had any problems until recently. I found that Google Chrome will simply not allow redirected downloads to start. I can download from direct links, but not pages that redirect and "Start in 3 seconds..." I immediately assumed it was the webpage itself, so I refreshed many times. I then restarted the browser, and after another failed attempt, my computer. After that point, I suspected my internet provider was to blame. I tried the redirection link in an alternative browser (Midori), and it worked perfectly fine. I decided it must be the version of Chrome that Google put out, so I quickly installed Chromium, and to my dismay, ran across the same problem. I can live with copying and pasting the url into Midori for redirected links, but I'd like the convenience of staying in my main browser. Thank you for any advice in advance. c:

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• When to use C over C++, and C++ over C?

  - by Dark Templar

  I've been introduced to Computer Science for a little over a year now, and from my experience it seems that C and C++ are both considered one of the "ultrafast" languages out there, whereas others such as Python and such scripting languages are usually deemed somewhat slower. But I've also seen many cases where a software project or even a small one would interleave files where a certain number n of those files would be written in C, and a certain number m of those files would be written in C++. (I also noticed that C++ files almost always have corresponding headers, while C files not so much). But my main point of inquiry is to get a general sense of intuition on when it is appropriate to use C over C++, and when it is better to use C++ over C. Other than the facts that (1) C++ is object-oriented whereas C is not, and (2) the syntaxes are very similar, and C++ was intentionally created to resemble C in many ways, I am not sure what their differences are. It seems to me that they are (almost) perfectly interchangeable in many domains. So it would be appreciated if someone could clear up the situation! Thanks

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• Windows gets progressively slower over time, why doesn't Ubuntu?

  - by William

  I, and many other previous Windows users notice that the computer seems to get progressively slower over time. I bought a leapfrog crammer only to find it installed process that sat there waiting for me to plug the crammer in so it could run the software. It took up three percent of the CPU twenty-four seven, seven day a week! This is one of the main reasons I left Windows. But, Ubuntu doesn't seem to slow down over time at all. Does Ubuntu allow programs to install background programs like the leapfrog crammer did to sit there like a leech and suck away at resources? Could someone explain why Windows tends to get slower over time, and is Ubuntu vulnrable to this too? Thanks for any help, this is puzzling me.

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• SEO: best way to deal with short lifetime URLs?

  - by Mike Norgate

  I am currently in the process of redesigning a job advert site and am trying to put a lot more effort into my SEO. My question is how should I deal with the URLs that point to job adverts when the advert expires. The options I have thought of so far are: Return a 404 error and redirect to a 404 page. Will it have an effect on ranking if there are a lot of URLs that return 404s after only being up for a few weeks? Redirect to job listing page - When the user requests a URL for an advert that has expired just redirect to the main job listing page. Show the advert but tell the user to has closed - Show the advert page but with a notification that the advert has closed. The issue I see with this is that the user will visit the page, see its closed and then leave the site again which would not be good for rankings

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• Forking an open source project using Git

  - by Cromulent

  There is an open source project that I want to fork for my own reasons. It currently has a Git mirror of its main SVN repository which I can use. What are the best techniques for forking a project whilst still maintaining the ability to merge future changes from the original project into your own forked repository using Git? Please note I will not be using Github at all for development so using any features from that is out of the question. The project will be hosted on a private VPS.

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• How to proxy with apache site from same domain but another port as a subfolder?

  - by myWallJSON

  So I have a problem - I have my main site on apache web server on debian on port 80; I develop a web server (in some C++ or C#) and it currently runs on port 6666. But some people are living under firewalls and can access only port 80. I wonder if it is possible via apache map all requests to say mysite.com:80/6666/url as if they were to mysite.com:6666/url, not map via redirection, but really make apache stream content from my site to user as if it were in some folder?

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• Is the increase in earning potential for a software developer enough to justify the cost of pursuing a masters degree? [closed]

  - by John Connelly

  Possible Duplicate: Is a Master's worth it? I am considering possibly enrolling in distance education at Kaplan University in order to pursue my masters. On one hand, I would prefer to have more free time so that I can continue to study for certifications and play with the technologies that interest me, work on my little side projects, etc. On the other hand, I am wondering how much difference it can make for my career if I go ahead and get a masters. I have been a .NET programmer since about 2004/2005. I'm currently working in a stable position but possibly considering a move to phoenix when my company's contract runs its course. There is not enough time between now and then for me to be complete with my masters, but I'm just trying to consider whether I should start. The main thing I am trying to determine is really whether or not the increase in earning potential is going to make the cost of pursuing my masters degree a good investment. Any thoughts?

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• What is the best database design for managing historical information? [closed]

  - by Emmad Kareem

  Say you have a Person table with columns such as: ID, FirstName, LastName, BirthCountry, ...etc. And you want to keep track of changes on such a table. For example, the user may want to see previous names of a person or previous addresses, etc. The normalized way is to keep names in separate table, addresses in a separate table,...etc. and the main person table will contain only the information that you are not interested in monitoring changes for (such information will be updated in place). The problem I see here, aside form the coding hassle due to the extensive number of joins required in a real-life situation, is that I have never seen this type of design in any real application (maybe because most did not provide this feature!). So, is there a better way to design this? Thanks.

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• Need some help on tomcat URL mod_rewrite or mod_jk

  - by Redbull Fan

  I am trying to remove the context name from the url of my server. Current URL - http://www.domainname.com/MyApp/ What I need to make is to make it avaialble at - www.domainname.com/ So it is only going to host one main app and that needs to be displayed when we open www.domainname.com/ on browser. I have already tried couple of things like below - RewriteEngine On RewriteCond %{REQUEST_URI} !^/(Context/.*)$ RewriteRule ^/(.*)$ /Context/$1 [P,L] OR redirect permanent /MyApp/ abcd://domainname.com OR Using JKMount - JkMount /MyApp/* ajp13 JkMount /MyApp* ajp13 OR Deploy war file to ROOT of tomcat and make relevant chagnes in web and server.xml All of these aren't working and I keep getting a intenal error. I need a way to basically trim the tomcat URL to make short. Thanks, Andy

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• Dynamic website SEO development

  - by Pankaj Upadhyay

  I made a website which stayed online for 6 months. During that period the search results for the site were not at all good. Even typing the domain name yielded just two or three category result. Now, I have taken the site down for total redevelopment and redesign. The aim of this question is to know the basics for SEO to be done while redesigning the site. My site will be in ASP.NET MVC 3 and will have main categories, sub categories and sub-sub if any. Then there will be products in those categories. All the data will come from MSSQL DB. Please tell me just the basics required for a dynamic website during development. I want to ensure that google and other engines index all the pages of my site including products or whatever.

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• Are Intel HD 4000 graphics supported on Ubuntu 10.04 LTS?

  - by user1118764

  I have an intel Core i7-3700 system with Intel HD 4000 integrated graphics with a dual monitor setup (1 connected via VGA, the other via DVI) on Ubuntu 10.04 LTS 64bit. I'm trying to get my monitors correctly detected. Right now, in only 1 unknown monitor is detected with a max resolution of 1280x1024, which is lower than my main monitor connected to DVI. Also, the desktop is mirrored rather than extended. I've previously managed to get a Core i5-2400 system with Intel HD 3000 integrated graphics with the same dual monitor setup and Ubuntu 10.04 LTS 64bit to work using the glasen ppa drivers, but this time, after installing them following the instructions How do I install the Intel HD 3000 video driver? but it doesn't seem to work. Does the Intel HD 4000 require a different driver from the 3000? If so, where can I get it?

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• Tampa Code Camp - October 13, 2012

  - by Nikita Polyakov

  I am pleased to announce Tampa Code Camp 2012 is being co-hosted with Bar Camp Tampa Bay this year in Tampa, FL on October 13th 2012 at USF Main Campus beautiful Business buildings.“CodeCamp is a FREE one-day meeting forum that allows software developers to share their knowledge and experience with Microsoft products and services. It’s similar to Tech-Ed, but community-driven by a group of dedicated volunteers and speakers while financially supported through generous sponsors and local businesses.”As one of the organizers, I will not be speaking, but instead helping MC the Component Vendor ShowDown - a special track dedicated to battling out the best components organized by focus application rather then firm. Check out the ShowDown track in the Agenda.WHEN: Saturday, October 13, 2012, 730AM – 545 PMWHERE: USF - Tampa Campus, 4202 East Fowler Avenue, Tampa, FL 33620REGISTRATION: http://www.tampacodecamp.comCOST: FREE

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• Removing surrounding noises from voice recording

  - by Peak Reconstruction Wavelength

  I have a wave file whose frequency spectrum looks like this. http://i.stack.imgur.com/2rRaS.png It contains audio, which I want to keep while removing the rest. The problem is that the surround noise changes, just those distinct voice patterns remain. I marked the voice patterns for clarity: http://i.stack.imgur.com/eLkBl.png What could an algorithm look like / a workflow in adobe audition look like that removes everything but the voice patterns? I think that the main characteristic is the line-shaped form over time. Loudness alone is not enough as the noise is loud aswell.

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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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• How to make content display on their proper pages on search engines

  - by Dendory

  So my site has a blog and gallery, both working the same way. There's an index, and each post has a permalink going to the individual entry. However, if I search for some of the content on Google, often it returns a link to the index, just because it happened to have been on the first page when it was crawled, instead of the individual post pages. This is especially true in cases of images. How can I make it so that Google returns the proper pages for the posts instead of just the main page of my site? My whole site is custom php code I made.

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• Blank screen when "boot from USB"

  - by Nathan

  OK so, here is what I have done: I downloaded the iso "ubuntu-12.04-desktop-amd64" I used "Universal-USB-Installer-1.9.0.0" to make a bootable USB I restart PC and change the boot option to USB HDD I get the menu to: Boot from USB Install to Hard drive Help etc When I click Boot from USB or Install to hard drive, loads of text flies past and then I get a blank screen and I cant see anything? What can I do so I can see the installation screen? Im using a dual monitor setup from my GFX card and my main display is on my HDMI port to my TV.

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• Should an object know its own ID?

  - by xenoterracide

  obj.id seems fairly common and also seems to fall within the range of something an object could know about itself. I find myself asking why should my object know its own id? It doesn't seem to have a reason to have it? One of the main reason for it existing is retrieve it, and so my repositories need to know it, and thus use it for database interaction. I also once encountered a problem where I wanted to serialize an object to JSON for a RESTful API where the id did not seem to fit in the payload, but only the URI and including it in the object made that more difficult. Should an object know it's own id? why or why not?

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• SEO - 2 websites in the same domain

  - by user6448

  I have my domain (http://www.foobar.com, for example) and my website talks about technology. I want to have another website (with other content, not about technology) inside of it (http://www.foobar.com/loremipsum). I can find http://www.foobar.com in Google Search, but http://www.foobar.com/loremipsum no ... What should I do to index this website? Thank you. update My main site (http://www.foobar.com/, a WordPress installation) has an .httaccess: # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> # END WordPress Does it affect the index of http://www.foobar.com/loremipsum ? Thank you.

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• Is it reasonable for REST resources to be singular and plural?

  - by Evan

  I have been wondering if, rather than a more traditional layout like this: api/Products GET // gets product(s) by id PUT // updates product(s) by id DELETE // deletes (product(s) by id POST // creates product(s) Would it be more useful to have a singular and a plural, for example: api/Product GET // gets a product by id PUT // updates a product by id DELETE // deletes a product by id POST // creates a product api/Products GET // gets a collection of products by id PUT // updates a collection of products by id DELETE // deletes a collection of products (not the products themselves) POST // creates a collection of products based on filter parameters passed So, to create a collection of products you might do: POST api/Products {data: filters} // returns api/Products/<id> And then, to reference it, you might do: GET api/Products/<id> // returns array of products In my opinion, the main advantage of doing things this way is that it allows for easy caching of collections of products. One might, for example, put a lifetime of an hour on collections of products, thus drastically reducing the calls on a server. Of course, I currently only see the good side of doing things this way, what's the downside?

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