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• Fast software color interpolating triangle rasterization technique

  - by Belgin

  I'm implementing a software renderer with this rasterization method, however, I was wondering if there is a possibility to improve it, or if there exists an alternative technique that is much faster. I'm specifically interested in rendering small triangles, like the ones from this 100k poly dragon: As you can see, the method I'm using is not perfect either, as it leaves small gaps from time to time (at least I think that's what's happening). I don't mind using assembly optimizations. Pseudocode or actual code (C/C++ or similar) is appreciated. Thanks in advance.

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• Good alternative to NetLimiter?

  - by Harsh

  There is a program NetLimiter for windows. While I was using Windows it was very useful for me to find out the IP address of the person who was downloading from me, or to know IP address of any person on LAN who was using DC++ with some nick. And after that I can easily know the computer name of that person using nbtstat. I was wondering if there is any tool for Ubuntu using which I can find out the IP address of person who is downloading from me or from whom I am downloading on LAN. I am on university LAN and we are using PtokaX and DC++ for file sharing on LAN. people sometimes put some offencive stuff on open chat on DC++ using some Nick and I don't know how to trace them while I am using Ubuntu.

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• What does ENDOFMENU do?

  - by Raymond

  I have been given an example program, I am wondering what exactly the <<ENDOFMENU and ENDOFMENU does, won't it work the same if you leave it out and just use the while loop? #!/bin/sh echo "Menu test program..."; stop=0; while test $stop -eq 0; do cat<<ENDOFMENU 1: print the date 2,3 : print the current working directory 4: exit ENDOFMENU echo; echo -e "your choice?\c" read reply echo case $reply in "1") date ;; "2"|"3") pwd ;; "4") stop=1 ;; *) echo illegal choice esac done

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• Unity greeter background on Xubuntu 12.04

  - by user67594

  I'm running Xubuntu 12.04 and using the Unity greeter with LightDM. Everything works well except for I can never change the background. I've tried editing the .conf file, editing the gsettings as the lightdm user, even compiling an override file for com.canonical.unity-greeter. All of these fail, and I end with a dark purple background. I was able to get rid of the grid using gsettings, but that's about it. I've enabled switching user backgrounds, but that never works. I'm wondering whether this is Xfce/Xubuntu specific, or a bug.

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• Cheerp -- C++ for web: advance or regression?

  - by Henrique Barcelos

  Recently I've run into Cheerp, a C++ to Javascript compiler, which uses a modified version of clang to generate Javascript code from C++ sources. That makes me wonder: why in the seven kingdoms would someone do this in their right mind? I mean: why would you take a language that is not designed for web at all, that is far more convoluted and bureaucratic, write your code and then compile it into Javascript itself? Can anybody see any advantages in doing so? We surely can discard performance as a reason, because in the end it generates pure Javascript code. Is there anyone here that have real experience with this? P.S.: I'm not sure if this is an on topic question, but this is the most general forum about programming that I could find in the StackExchange network. Edit Although this seems like a subjective question, it is not. I am asking for reasons that this tool could be useful. I got interested at first, but started wondering why would someone use it.

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• Is there some application to download files from popular file hosting websites?

  - by Tim

  I was wondering if there are some applications for downloading files from some popular hosting websites, automating the procedure of waiting and fetching links and downloading files, once we give the applications the links? Examples of such websites are Rapidshare, Uploading, Megaupload, Filesonic, Fileserver, Hotfiles, Depositefiles, iFile. But the applications are not necessarily applicable to all of them. Thanks and regards! ADDED: I just tried slimrat. It failed to download files from rapidshare. Can it be because the website of rapidshare has changed recently and the parsing functionality for their website by slimrat is not up-to-date yet.

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• Best resources to learn Game Development from a Java background?

  - by Julio

  Hi guys, I'm an enterprise Java programmer, however something I've been interested in and what got me into the whole programming thing was the idea of being able to create a game. Just wondering if anybody could offer any advice, or book recommendations. The side I am most interested in is game engine design and implementation. People may say "ahh but plenty exist why write your own" - its purely for learning purposes, seeing how things work and so on. So far I've taken a look at LWJGL, but achieved nothing too serious. Thanks.

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• Which Shopping Cart is better to run online grocery shop Prestrashop or nopCommerce

  - by Bigmunk

  I have been researching on open source software for an online grocery shop project. I have now narrowed by search to .NET based nopCommerce and the PHP based PrestaShop shopping carts. My plan is to acquire an open source shopping cart and hire a local developer to customize it to our local needs & as per our requirement. I'm now wondering whether I should have a developer start the whole project from scratch, or use an open source software such us PrestaShop or nopCommerce which can then be customized? Note that my store will have thousands of products and services so I want something that can handle up to 5000 products and over. Thanks for your thoughts and advice in advance.

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• Is it time to drop Courier from your monospace font stacks?

  - by Jeff

  I've been fine-tuning my font stacks lately and was wondering if it's safe to drop Courier from my monospace font stack yet? Would you feel comfortable dropping it? Of course, monospace is my final fallback. Note 1: OS Testbed: WinXP, WinVista, Win7, iPhone, iPad Based on my research, these browsers now substitute Courier New for Courier by default: IE9+ Chrome 2+ Firefox 10+ Safari 3.1+ iDevices Note 2: The default "font-family: monospace;" renders as Courier New in every browser I've tested, from IE6 through the latest iPhone/iPad devices. EDIT: One exception is Opera 12, which renders Consolas on Win. Opera 10 renders Courier New. Note 3: I've noticed that Courier refuses to render with any font smoothing (anti-aliasing) in any browser I've tested, regardless of system and/or browser display settings. Probably because it's an old bitmap font. This could be because of my system setup, however.

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• Help us with our git workflow

  - by Brandon Cordell

  We have a web application that gets deployed to multiple regions around our state. An instance of the application for each region. We maintain a staging and production (master) branch in our repository, but we were wondering what is the best way of maintaining each instances codebase. It's similar at the core, but we have to give each region the ability to make specific requests that may not make it into the core of the application. Right now we have branches for each region, like region_one_staging, and region_one_production. At the rate we're growing we'll have hundreds of branches here in the next few years. Is there a better way to do this?

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• How much help should I give during technical interviews?

  - by kojiro

  I'm asked to perform or sit in during many technical interviews. We ask logic questions and simple programming problems that the interviewee is expected to be able to solve on paper. (I would rather they have access to a keyboard, but that is a problem for another time.) Sometimes I sense that people do know how to approach a problem, but they are hung up by nervousness or some second-guessing of the question (they aren't intended to be trick questions). I've never heard my boss give any help or hints. He just thanks the interviewee for the response (no matter how good or bad it is) and moves on to the next question or problem. But I know something about the rabbit hole that defeat and nerves can lead you down, and how it disables your mind, and I can't help wondering if providing a little help now and then would ultimately help us end up with more capable programmers instead of more failed interviews. Should I provide hints and assistance for befuddled interviewees (and if so, how far should I go while still being fair to the more prepared candidates)?

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• Dynamic Terrain Texture

  - by lgrevenl

  I've been looking at a 2D physics game called 'Hill Climb Racing' (Android and iOS) and was wondering how they went about texturing the terrain? I've had a think about it and I've come up with nothing and finding a resource on the web has proved impossible. Please help. The game mentioned uses Cocos2d. Would it be just as doable in a different environment? EDIT: I was looking at another question: Drawing large 2D sidescroller level terrain The end result is what I'm looking for, but in my mind I was thinking that there would be some way to add this effect (using small textures) to some terrain specified by vertices rather than making a very large image to match whatever is seen in the level.

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• What is the role of C++ today?

  - by hades

  Currently I'm an IT student and I'm wondering what is still important in C++ today, what for is it used? I completed basic C++ course in my university but I can't imagine where can I use my knowledge and in which direction should I go learning C++. In other words what should I learn to become a successful C++ programmer? Currently I'm learning Java just because I don't see clearly in which area C++ could be useful today, but I clearly know which kind of work I'll be doing as a Java programmer. But I still hope that C++ isn't dead.

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• How do I load Ubuntu using Netboot?

  - by Michaeljwjr

  I've been reading through the different options and through the wiki but was wondering which option would be the best for me? I have a tower that was running Windows XP from a friend, and want to load Ubuntu onto it. The boot options are Network Boot, Floppy, CD-ROM, Hard Drive. No USB option. Phoenix - AwardBios Core Version V6.0, BIOS Revision 3.11 5/17/2004 256 mb pc2700 I have my desktop running Ubuntu, but need to know how to get Ubuntu onto that tower. Which is my best option, and what do I download to get it set up properly? Any advice towards a Netboot would be amazing. Thank you in advance.

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• Visual Studio 2010: Fun with extensions

  - by BizTalk Visionary

  One of the powerful things that has come into Visual Studio over the last few years has been joy of extensions. With 2010 there seems to be even more!! Of course teaching old dogs like myself new tricks always takes time but interestingly enough some of the rules I learnt early in my working life over 30 years ago still hold true!! A derivation of one that was knocked into during my engineering apprenticeship and associated exams was RTFQ! Read the ‘flippin’ question. (I replaced the original ‘F’ with a more palatable version here!). Today I forgot that rule and didn’t RTFI (I being instructions) and spent a fruitless hour wondering why my Entity Framework POCO generator never appeared in the new project template list when I wanted to add it!! It was simple of course – I had only installed the Entity Framework POCO generator for web sites and not building a web project meant it would never appear!!! A quick look again I found the ‘other’ extension that supported my project type! So RTFI!!

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• Pros and cons of the Google font API

  - by Seamus

  I am currently using a font from the google font directory on my website. I don't fully understand how it works, but it seems like when someone opens my site, their browser is told to go and fetch the font from Google. (correct me if I'm wrong). Now, what I'm wondering is, what are the pros and cons of this over just specifying a font family the old-school way? Presumably doing it the google font directory way has the advantage that they'll definitely see the font I want them to. (as long as the font directory is up). But does this way have disadvantages? Maybe using fonts that are stored locally speeds up the site loading?

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• Direct X-forwarding

  - by Sean Houlihane

  I'm struggling to set up X-forwarding between 2 different machines on my local network and my ubuntu desktop. I'm able to connect using ssh x-forwarding one one machine, but the other machine (a Qnap TS-219P II) seems to have a less functional build of SSH on it, and I'd rather use a simpler approach. I've set $DISPLAY, and done 'xauth list $DISPLAY' on the desktop, then 'xauth add ' on the remote machine. From the remote machine, I just get xterm xterm Xt error: Can't open display: 192.168.0.4:0.0 Now, oddly, if I connect via ssh -X, there is a different magic cookie for the tunnelled port (but neither seems to work). I'm wondering if there is a port which needs to be enabled to permit X connections from the LAN? If so, how? The proper solution might be to re-build all the packages which are preventing X-forwarding from working on my QNAP machine, but lets assume for the purposes of this question that I've tried building enough packages on that architecture already and want to run X without the overhead of encryption.

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• Can I create a hybrid software-RAID array with disks of different sizes?

  - by stueng

  Products such as Synology offer something called Synology Hybrid RAID http://www.synology.com/us/products/features/RAID.php This RAID type allows you to make best use of your disks available by using all the disk space available as long as at least two disks share the same increased size where a typical RAID setup would simply "throw away" the extra space I would like to build a NAS with 4 disks available. I will begin by populating it with 3 X 3TB to give me 6TB usable. By the time I have filled this 6TB I imagine that 4TB disks will have come down in price, so at this stage I would add a 4th 4TB disk to give me an additional 3TB of space. When I next run out of space I will change one of the original 3TB disks with a 4TB disk giving me an additional 1TB of space. This is not possible with a typical RAID configuration, only with these "hybrid RAID" types I am wondering if I can acheive a similar "hybrid RAID" with Ubuntu? or another linux distro?

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• iOS: Versioned static frameworks vs Git Submodules and included code

  - by drekka

  For the last couple of years I've been building static frameworks of common APIs for my iOS projects. I can build a universal binary containing all the architectures (i386, armv6, armv7) and wrap it up in a .framework directory structure. I then stored this in a directory based on the version of the framework. For example ..../myAPI/v0.1.0/myAPI.framework Once I have this framework I can then easily add it to a project and if I want to advance the version, merely change the framework search paths to the later version. This works, but the approach is very similar to what I would use in the Java world. Recently I've been reading about using Git submodules and static framework sub projects in XCode 4. Im wondering if my currently approach is something that I should consider retiring and what the pros/cons are of the new approach. I'm weary of just including code because I've already had issues in a work project which had (effectively) multiple versions of a third party API. Any opinions?

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• Coding a web browser on Windows using a layout engine?

  - by samual johnson

  I've never attempted anything like this before but what I want to do is code a browser for Windows. I know that I can use the web-browser control that Microsoft has released, but I'm interested in seeing how the problem is solved from a lower level. So I want to know what layout engine I should be looking at? Or is a layout engine the best way to go? I've been looking at WebKit, but it seems rather Mac-centric, so I'm wondering if there are any more practical one's for windows? Has Microsoft released the source code for their webbrowser winforms control in the .Net framework? That would be dependent on the CLR anyway, I suppose? Any suggestions?

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• Store HighRes photos in Database or as File?

  - by David

  I run a site which has a couple of million photos and gets over 1000 photos uploaded each day. Up to now, we haven't kept the original file that was uploaded to conserve on space. However, we are getting to a point that we are starting to see a need to have high-res original versions. I was wondering if its better to store these in the filesystem as an actual file or if its better to store them in a database (ie: mysql). The highres images would be rarely referenced but may be used when someone decides to download it or we decide to use it for rare processes like making a new set of thumbnails sizes/etc.

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• PDF or ebook Java API documentation

  - by AmaDaden

  Since I have a long train ride to and from work I was wondering if there is a version of the Java API documentation floating around that I could put on my Kindle. It would be nice on the rare occasion I get something in my head that I want to think about some more. I know I can browse the web through the Kindle but coverage is spotty and slow. I know that the api docs are not really designed for a sequential reading format but I'm curious to see if anyone else has thought about this and given it a shot.

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• Is your company thinking of transitioning from java to another technology?

  - by Augusto

  As every Java developer knows, Oracle bought Sun and the future of java looks quite unclear, specially since Oracle wants to monetize the JVM. Java as a language has also been stale in the last few years, the non-inclusion of closures is one example (which might be included in java 1.8) At the same time, some new technologies such as Ruby, Scala and Groovy are being used to deliver complex sites. I'm wondering if there are companies or organizations which are talking, doing spikes or starting to use a different technology, with the idea to stop using java for green field projects, in the same way that 15 years ago companies migrated form C++, perl and other technologies to Java. I'm also interested to know what are the impressions of this happening, for example: planning to migrate to a different technology in 2 years. To be clear, I'm not asking which technology is better. I'm asking if your organization is thinking to leave Java for another technology.

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• Fork dead SVN based project on GitHub

  - by Quinn Bailey

  I previously asked this at stack overflow but it was closed, I believe because 'programmers' is a more appropriate venue for this question. I have done some work on the SVN Importer project (Apache license), which appears to be effectively dead (no published changes in 5 years). I have a login to their svn server but do not have commit rights. At any rate, I'd like to convert this project to Git and push my own changes to GitHub. The GitHub site suggests the svn2git tool for converting svn projects to Git, so I was planning to convert the SVN repository to Git, add my changes, and then push this Git repository to GitHub. I'm wondering, what are the legal requirements and common conventions of this process? Is it acceptable to clone the entire history of the project and move it to GitHub? Also, even though this is essentially a dead project, once I've translated the repository to Git should I put all of my commits onto a non master branch or is it acceptable to use master in this case?

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• fast java2d translucency

  - by mdriesen

  I'm trying to draw a bunch of translucent circles on a Swing JComponent. This isn't exactly fast, and I was wondering if there is a way to speed it up. My custom JComponent has the following paintComponent method: public void paintComponent(Graphics g) { Rectangle view = g.getClipBounds(); VolatileImage image = createVolatileImage(view.width, view.height); Graphics2D buffer = image.createGraphics(); // translate to camera location buffer.translate(-cx, -cy); // renderables contains all currently visible objects for(Renderable r : renderables) { r.paint(buffer); } g.drawImage(image.getSnapshot(), view.x, view.y, this); } The paint method of my circles is as follows: public void paint(Graphics2D graphics) { graphics.setPaint(paint); graphics.fillOval(x, y, radius, radius); } The paint is just an rgba color with a < 255: Color(int r, int g, int b, int a) It works fast enough for opaque objects, but is there a simple way to speed this up for translucent ones?

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