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• Identifying connected lines drawn free-hand by a user

  - by rawrgoesthelion

  I have a series of 'images' described by a mixture of connected lines and curves. Users will draw on the screen, free hand, and my goal is to break their drawing down into a series of lines and curves that can be matched with the 'images' in my set. For the sake of simplicity, let's assume this is occurring on a touch screen. These lines will be connected. Each time the user's finger moves, the dx and dy is recorded. The drawing is considered complete and analyzed when the user's finger leaves the screen. I'm having trouble figuring out a good way to break the user's drawing down into lines. Is there any well known approach to this problem, a C++ library that solves it, or any good articles/technical papers on how to achieve this?

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• Radeon HD4850 card, ubuntu 12.04.1 LTS Installed FGLRX drivers, but still running vesa, how to solve it?

  - by user113416

  I have ati HD4850 card, ubuntu 12.04.1LTS. To begin with, after fresh instll, i installed fglrx drvers from system -- additional drivers, according to fglrxifo everything was alright, but the system was running on vesa:sem. After that, i have reinstalled and installed drivers according to many tutorials, but stille got that problem. one of the tutorial was here: What is the correct way to install ATI Catalyst Video Drivers (fglrx)? of course, i attempted to install 12.6 driver Now i have a fresh install of ubuntu and don't want to touch anything without anyone's support, because my 3 days nightmare didn't give results. what must i do to have an adequate performance of video card? Thanks in advace.

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• Binfmt config not persisting after booting

  - by Ishpeck

  I have the binfmt kernel module set up so I can run .NET apps as if they were native binaries. I have the /etc/rc.local file configured identically to this. If I power down my computer or boot into Windows, when I come back to Ubuntu, I can't run .NET apps without calling Mono. However, if I simply touch /etc/rc.local and restart, the binfmt configuration appears to kick in and I can run my .NET EXE's as I expect to. How do I get my configuration to stick?

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• Installing a directory with a Debian Package

  - by Meisie

  Hi guys I want to create a Debian Package that installs a bunch of Folders to a system but I can't get it working. The Package gets created without any errors and lintian also says it's okay but installing does nothing. The rules file looks like this: <#>!/usr/bin/make -f logs = $(CURDIR)/shell_logs/ DEST1 = /opt/Pacetutor/ build: build-stamp build-stamp: dh_testdir touch build-stam clean: dh_testdir dh_testroot rm -f build-stamp dh_clean install: build clean $(logs) dh_testdir dh_testroot dh_prep dh_installdirs mkdir -m 755 -p $(DEST1) <- this is propably optional or not needed -> cp -r $(logs) $(DEST1) <- using mv works but thats not what I want. -> binary-indep: build install dh_testdir dh_testroot dh_installchangelogs dh_installdocs dh_installexamples dh_installman dh_link dh_compress dh_fixperms dh_installdeb dh_gencontrol dh_md5sums dh_builddeb binary-arch: build install binary: binary-indep binary-arch .PHONY: build clean binary-indep binary-arch binary install

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• Why can't I access hw:1,0 until gstreamer-properties is run once?

  - by Shadd

  Not necessarily an Ubuntu-specific question but I wasn't sure where else to ask. I have an AverMedia DVD EZMaker 7 which plugs into USB and works well on Ubuntu 12.04. I downloaded and installed the official drivers without error. However, when I try: gst-launch alsasrc device="hw:1,0" ! alsasink device="hw:0,0" it tells me: Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock: GstAudioSrcClock which is the normal output, however there is no audible sound. Trying the command again doesn't help. If I run gstreamer-properties and close it right away (don't need to touch any controls), THEN the gst-launch command works. If I unplug the device and plug it back in or restart the computer, I have to run gstreamer-properties again. What is gstreamer-properties doing that enables the audio?

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• OpenGLES 2.0 gluunProject

  - by secheung

  I've spent more time than i should trying to get my ray picking program working. I'm pretty convinced my math is solid with respect to line plane intersection, but I believe the problem lies with the changing of the mouse screen touch into 3D world space. Heres my code public void passTouchEvents(MotionEvent e){ int[] viewport = {0,0,viewportWidth,viewportHeight}; float x = e.getX(), y = viewportHeight - e.getY(); float[] pos1 = new float[4]; float[] pos2 = new float[4]; GLU.gluUnProject( x, y, 0.0f, mViewMatrix, 0, mProjectionMatrix, 0, viewport, 0, pos1, 0); GLU.gluUnProject( x, y, 1.0f, mViewMatrix, 0, mProjectionMatrix, 0, viewport, 0, pos2, 0); } Just as a reference I've tried transforming the coordinates 0,0,0 and got an offset. It would be appreciated if you would answer using opengl es 2.0 code. Thanks

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• What exactly does an installer do and why might I need one?

  - by Jan

  this is probably the noob-question of the day: So I've written this game. Now there's the .exe file that does the work, a folder with my beautiful, beautiful assets and a bunch of .dll files and other stuff that I probably shouldn't touch. To run the game, I copy the whole lot to the desired computer, double-click the .exe file and start shooting some dudes. Yay! But what exactly is the difference between that and using an installer? What else does an installer do besides copying files and looking more professional than a .zip-file? Is there generally a lot of patching/configuring involved when trying to make a game run on a different computer? I tested my game on all windows computers I could get my greedy fingers on and it works great. Thanks for your time.

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• USB ports not working on Xubuntu 12.04 LTS

  - by Zchpyvr

  Basically, my USB ports on my IBM Thinkpad T43 have stopped working most of the time. Sometimes, they mount and appear in Nautilus, but other times, they aren't recognized. The timeline of events on this laptop for the past few months: Started having problems after using a USB port hub. The port would sometimes work but would be fixed with the occasional reboot. Re-partitioned/Expanded my Xubuntu partition (I have a Windows XP/Xubuntu dual boot). Now the majority of the time, the USB fails to recognize devices. In addition, the few times they are recognized, the device may suddenly disconnect. Things I've noticed: The devices still receive power from my computer (I can charge my ipod..etc..) I can't understand dmesg outputs. I don't know if lsusb is telling me anything useful. My dmesg output is here: http://pastebin.com/KdNxHcFC Things start to get weird at the bottom of the file. And my lsusb is: $ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

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• Without using a pre-built physics engine, how can I implement 3-D collision detection from scratch?

  - by Andy Harglesis

  I want to tackle some basic 3-D collision detection and was wondering how engines handle this and give you a pretty interface and make it so easy ... I want to do it all myself, however. 2-D collision detection is extremely simple and can be done multiple ways that even beginner programmers could think up: 1.When the pixels touch; 2.when a rectangle range is exceeded; 3.when a pixel object is detected near another one in a pixel-based rendering engine. But 3-D is different with one dimension, but complex in many more so ... what are the general, basic understanding/examples on how 3-D collision detection can be implemented? Think two shaded, OpenGL cubes that are moved next to each other with a simple OpenGL rendering context and keyboard events.

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• 12.10 nautilus on dell xps 12 does not work

  - by user108664

  I have installed 12.10 on a new Dell XPS 12 ultrabook. Everything seems to work properly right now, including the touch screen, except for nautilus. The left pane works properly, I can select an item on the left and the contents will show up on the right, but when I go to do anything with the contents on the right nothing happens, I can't double click to open, I can't right click to bring up a menu. I can however hold down the left button and to draw a box to select more than one item, but I can't do anything with the selected items. I did not have these problems when I tried 12.04, but unfortunately the touchscreen does not work out of the box on 12.04 and 12.10 seemed to be the faster way go. Any ideas? How can I log what is happening when I try to do anything in nautilus?

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• Fujitsu B6220 laptop, sometimes my desktop freezes upon resume from standby

  - by user89756

  I installed Ubuntu 11.10 on my Fujitsu Lifebook B6220 laptop just before 12.04 was released. I can not remember if I had this issue with Ubuntu 11.10 as I updated the install to 12.04 about a week after 12.04 came out. My problem is that sometimes upon resume from standby my desktop is frozen. The keyboard, touch pad, and touchscreen work, but there is no response from the desktop. I can ctrl-alt-f2 and log in and then from there I just reboot the computer. This happens about 50% of the time when I resume from standby but I have not noticed a distinct pattern. I have thought about reinstalling 12.04, since I upgraded 11.10 to 12.04 instead of a fresh install. But I have customized my laptop a lot and I would prefer to avoid reinstalling it, I'm not even sure if that would fix it. Anyone have a idea what might be the problem? If I should submit this as a bug, could someone point me in the right direction please? Thanks, Matt

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• AJAX spreadsheet editor interfaced to own website

  - by Ole Tange

  My website has records that are tables. I would like for my users to be able to edit these records in an easy way. Currently they download a .csv-file, edit it in their favourite spreadsheet, and upload it again. But this often fails (they upload in wrong format or edit fields that they are not supposed to touch). I would therefore like to present the users with an editor directly on the website. So just like you can have WYSIWYG editors in CMSes for text I would like to have it for spreadsheets. One solution would be to interface my website with GoogleDoc and have the users edit the files using GoogleDoc's spreadsheet, and some how get the sheet back when they are done, but I do not know if this is possible at all.

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• My laptop does not have sound and the video reproduces it very rapidly. ubuntu 12.04

  - by user48221

  Once my laptop was fallen and the wi-fi broke, lead her to repairing and when they returned me already it had wi-fi again, but I realized that it did not have sound. In sound configuration it could not raise him, to know if it was a problem of the horns I connected a few headphones and neither it was listened. Because of it I knew that it was a problem of the software, and another problem that I saw, it was that the video player was going too rapidly as if it was advancing him. Where it leads her to arranging they say that they did not touch anything of software, alone they repaired the device of the wi-fi. How I can fix it?

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• Windows Embedded Standard 7 est disponible, Microsoft l'a distribué aux OEMs

  Windows Embedded Standard 7 est disponible, Microsoft l'a distribué aux OEMs Microsoft vient d'annoncer la sortie de Windows Embedded Standard 7, qui intégrera Media Center (pour permettre aux fabricants de développer des produits comme des récepteurs numériques avec un contenu multimédia centralisé.) ainsi que des interfaces multimouvements tactiles et des applications context-aware avec Windows Touch. De plus, le système sera tourné vers le vert avec des API de management de puissance permettant de développer des solutions allant dans le sens de la green IT. Des analystes spécialisés estiment que les parts de marché potentielles pour Microsoft dans le domaine des médias digitaux (magnétoscopes numériques, TVs à écrans plats, etc....

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• Why is it good not to rely on changing state?

  - by Slomojo

  This question arises out of the question Is Haskell worth learning? Generally a few often repeated statements are made, about how Haskell improves your coding skills in other languages, and furthermore, this is because Haskell is stateless, and that's a good thing. Why? I've seen someone compare this to only typing with the left hand, or perhaps closing your eyes for a day and just relying on touch. Surely there is more to it than that? Does it relate to hardware memory access, or something else which is a big performance gain?

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• Is there software that can visualize all sounds from the sound card?

  - by bentsai

  I'm looking for a solution to this problem: When I'm working at my computer, sometimes I'll be using noise-isolation headphones connected to a source other than my computer (e.g., an iPod). I would like to see (this is what I mean by "visualize") some kind of notification on my screen, since I will not be able to hear the sound. Is there any software out there that would accomplish this? I'm interested in seeing any sounds that would normally come out of th sound card. This is for Windows (XP), but I'd be interested in hearing solutions for other flavors, and OS X, as well.

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• Oracle HCM World: Evite Now Available! February 4-6, Las Vegas

  - by Roxana Babiciu

  Add that personal touch by inviting your human capital management partners to HCM World with our new evite! Oracle HCM World is where HR, talent management and technology intersect. This is the event for HCM professionals, whether they are involved in recruiting and staffing, learning and development, compensation and benefits, or any other aspect of HR. Nine tracks and more than 90 sessions will unveil invaluable strategy and best practices to more than 1,500 attendees. Mark Hurd and David Rock, industry luminary and CRO of NeuroLeadership Group are both confirmed as keynote speakers. The call for papers deadline has been extended to November 15 and early bird registration ends November 22. Visit the HCM World website and Field Flash for more information.

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• How do I disable auto-away for online presence?

  - by Will

  I am using Natty with with classic GNOME desktop. I use Empathy and sometimes Skype. Both these get the online state from the system itself somehow. If I don't touch my keyboard for a few minutes - even when watching a YouTube clip or something - the inactivity triggers an auto-away state on my messaging apps. It's synchronized so I imagine its coming coordinated from the system, and not the two apps making the same decision individually. How can I disable this? I want manual control - I'm only away when I set it to away in a messaging app.

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• What can I learn to build a (kind of) recommendation system?

  - by lsmagalhaes

  I'm learning how to develop an android app (nothing serious, just for learning and fun), so I devised the following goal: an app that learns with users actions and, some time later, starts to suggest some useful things. For example: The user add some notes daily, in the morning, and mark some of them as done generally on thursdays and sundays, at evening. Based on that behaviour and the relation of the notes marked as done, the app will prioritize notes that are more propense to be marked, and avoid notifying in days where no note is marked. This is a silly example but I think it ilustrates well what I want to do. I know this is a matter of machine learning, but I don't know where I should start learning. To anyone interested, I'm build a backend in Python, so any libraries or frameworks in this language are very welcome. The frontend, by the way, is sencha touch + phonegap.

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• Silverlight Connections - Vegas Nov 1-4

  got asked to speak at SilverlightConnections in Vegas in Nov. :) topics include: 'Breaking Down Walls The Story of Getting designers and developers working together in an Agency Environment' and 'Multi Dos and Dont touches Multi Touch Development from the trenches' and 'Going from Silverlight to Phone 7 Silverlight Application Development'http://www.devconnections.com/shows/FALL2010ASP/default.asp?s=151 Title: Breaking Down Walls The Story of Getting designers and developers working together in...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• What driver for nVIDIA GeForce MX440?

  - by ubufan

  I have recently installed (clean install) Ubuntu 12.10 on a desktop PC with nVIDIA GeForce MX440 (AGP 8x) and I have problems with Unity. Although I can see the desktop, however i can't see unity bar and icons. So, I decided to install lubuntu-desktop to see the performance. And yes! I choose lubuntu-desktop from Log On screen and the performance is definetely much better and has nothing to do with the aforementioned on unity. The system has native drivers from the Ubuntu installation. I didn't touch anything in xorg configuration. I also remember that I have managed to have the best performance with this graphic card on my previous Ubuntu 9.10 system, by editing some values in /etc/X11/xorg.conf file. But I can't remember that options, because I formatted the / partition! My question is: Which is the most suitable driver for this card, in order to load the unity feature and have better performance on it?

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• Google s'intéresse de près au bureau en 3D en rachetant une start-up canadienne : bientôt dans Chrom

  Google s'intéresse de près au bureau en 3D En rachetant une start-up canadienne : bientôt dans Chrome et Android ? BumpTop vient d'être rachetée par Google. Cette start-up canadienne a mis au point une interface 3D destinée à remplacer le bureau de Windows ou de Mac OS. Visiblement très intéressé par ce produit - et très satisfait de son état d'avancement - Google a décidé de faire l'acquisition de la société pour un montant resté confidentiel. Un des atouts de BumpTop est de supporter le multi-touch. Une fonctionnalité qui en fait un client idéal pour intégrer Android, l'OS de Google pour les smartphones (ou les terminaux tels que les télévisions), voire pou...

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• Microsoft diffuse le premier spot TV de Windows 8, la campagne de promotion de l'OS s'annonce plus dynamique que les précédentes

  Microsoft diffuse le premier spot TV de Windows 8 La campagne de promotion de l'OS s'annonce plus dynamique que les précédentes Pour sa sortie officielle prévue le 26 octobre, Microsoft entame la campagne marketing pour Windows 8 et diffuse une première vidéo promotionnelle. Souplesse, rapidité et habilité, telle est la ligne directrice de ce spot TV qui donne le ton d'une méga-campagne qui s'annonce plus dynamique, et de loin, par rapport aux précédentes. Le spot, diffusé aux États-Unis et sur YouTube, commence par un compte positif qui stagne à 8, suivi du déroulement rapide des fonctionnalités du nouvel OS centrées sur le multi-touch avec des clichés du numéro 8 qui re...

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• Wordpress Mobile Edition, Wordpress Mobile Pack, WPTouch - Which one and how?

  - by heartcode

  Hi everyone, First of all, Happy New Year! I am thinking about making my blog accessible and enjoyable on mobile devices (as many handsets as possible). I am using Wordpress 3.0.4. What I've found is couple of cool plugins like WPTouch (for touch enabled devices), The Wordpress Mobile Edition and the Wordpress Mobile Pack. I am wondering which one is the best to use if I can use only one. If I can use more or (even all these three) are they compatible? Does anyone have any experiences in this topic? If so I would much appreciate some advices or best practice links. Happy 2011, thanks in advance, Rob

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• Windows 8: Paradigm Shift

  You've probably heard a lot about the loss of the Start button in Windows 8. While it isn't completely lost - you can still get to it via a convoluted path - its disappearance is merely a sign of the rethinking that went into the operating system's creation. Window 8's designers made certain assumptions while building the new system: Users will interact with the operating system predominantly through a touch interface. Users will do their computing on mobile devices, and may in fact use several different devices for the same purposes. They may even want to get work done on devices they do n...

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