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Articles indexed in November 2013

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  • sed problem with scripting

    - by Pablo Ramos
    I am trying to run a script using sed i runing like this for et in 1 # 2 3 do if [ -d ET$et ]; then rm -rf ET$et; fi mkdir ET$et cd ET$et cp $home/step_$i/FDE/diabatA/run.adf . cp $home/step_$i/FDE/diabatA/mas$i.xyz . awk1=`awk '/type=fde/{print NR }' run.adf | head -1` awk2=`$(echo "$a+379" | bc -l )` sed -n "$awk1,"$awk2"p" run.adf > first awk3=`awk '/ATOMS/{print NR +1}' first` awk4=`cat mas$i.xyz | wc -l` awk4=$( echo "$awk4-1" | bc -l ) awk5=`awk "/ATOMS/{print NR +"${awk4}" }" run.adf` sed -n "$awk3,"$awk4"p" first > atoms par=$( echo "$awk4-99" | bc -l ) rho1=$(cat atoms | head -34 ) rho2=$(cat atoms | head -64 | tail -31) rho3=$(cat atoms | head -97 | tail -33) rhoall=$(cat atoms | tail -${par} ) echo -e "$rho1\n$rho2\n$rhoall" > eje done but is telling me this: (standard_in) 1: syntax error sed: -e expression #1, char 6: unexpected `,' sed: -e expression #1, char 1: unknown command: `,' Please, I appreciate any help with this issue... Thanks Pablo

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  • How do I change the default .htm file icon?

    - by Michael Clayton
    I really enjoy the look of UBUNTU. The only thing that I want to change is the default icon used for .html (.htm) files. I want to use the icon /usr/lib/firefox/browser/icons/mozicon128.png instead. I do not want to change any other visual element. Is there a practical way to accomplish this small change? edit: @Mitch, I've used assogiate in the past and although I was able to change the icon used for .mht files, I could not get it to change the .htm icon. @Anwar Shah, thanks for the information. I wish that it would work for me. Running 13.10 x86, after I do the copy of the icons, in the folders are a bunch of links to .svg files not actual graphics files. It does not appear that the second copy actually does anything on my system.

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  • Lost all privileges since upgrading to 13.10

    - by Chris Poole
    Since upgrading to 13.10, I no longer have the 'privileges' to do the following things: Mount USB/CDROM drives Run software centre or software updater Press the GUI shut down or restart buttons Unlock my account in the 'settings - user accounts' section (padlock is greyed out) Also, when logging on as a guest user I get error messages relating to Compiz crashing with SIGSEGV and it hangs on a blank wallpaper screen. However, I still am able to use sudo in the terminal. Output of 'groups' is jenchris adm dialout cdrom sudo audio video plugdev lpadmin admin pulse pulse-access sambashare sudo usermod -U username doesn't have any effect Output of sudo dpkg-reconfigure -phigh -a acpid stop/waiting acpid start/running, process 30454 * Starting AppArmor profiles Skipping profile in /etc/apparmor.d/disable: usr.bin.firefox Skipping profile in /etc/apparmor.d/disable: usr.sbin.rsyslogd [ OK ] * Reloading AppArmor profiles Skipping profile in /etc/apparmor.d/disable: usr.bin.firefox Skipping profile in /etc/apparmor.d/disable: usr.sbin.rsyslogd [ OK ] apport stop/waiting apport start/running gpg: key 437D05B5: "Ubuntu Archive Automatic Signing Key <[email protected]>" not changed gpg: key FBB75451: "Ubuntu CD Image Automatic Signing Key <[email protected]>" not changed gpg: key C0B21F32: "Ubuntu Archive Automatic Signing Key (2012) <[email protected]>" not changed gpg: key EFE21092: "Ubuntu CD Image Automatic Signing Key (2012) <[email protected]>" not changed gpg: Total number processed: 4 gpg: unchanged: 4 atd stop/waiting atd start/running, process 1388 avahi-daemon stop/waiting avahi-daemon start/running, process 1521 Rebuilding /usr/share/applications/bamf-2.index... update-alternatives: using /usr/share/man/man7/bash-builtins.7.gz to provide /usr/share/man/man7/builtins.7.gz (builtins.7.gz) in auto mode update-binfmts: warning: current package is openjdk-7, but binary format already installed by openjdk-6 binfmt-support stop/waiting bluetooth stop/waiting bluetooth start/running, process 4255 update-initramfs: deferring update (trigger activated) /var/lib/dpkg/info/compiz.config: 1: /var/lib/dpkg/info/compiz.config: [general]: not found /var/lib/dpkg/info/compiz.config: 2: /var/lib/dpkg/info/compiz.config: backend: not found /var/lib/dpkg/info/compiz.config: 3: /var/lib/dpkg/info/compiz.config: plugin_list_autosort: not found /var/lib/dpkg/info/compiz.config: 5: /var/lib/dpkg/info/compiz.config: [gnome_session]: not found /var/lib/dpkg/info/compiz.config: 6: /var/lib/dpkg/info/compiz.config: backend: not found /var/lib/dpkg/info/compiz.config: 7: /var/lib/dpkg/info/compiz.config: integration: not found /var/lib/dpkg/info/compiz.config: 8: /var/lib/dpkg/info/compiz.config: plugin_list_autosort: not found /var/lib/dpkg/info/compiz.config: 9: /var/lib/dpkg/info/compiz.config: profile: not found /var/lib/dpkg/info/compiz.config: 11: /var/lib/dpkg/info/compiz.config: [general_ubuntu]: not found /var/lib/dpkg/info/compiz.config: 12: /var/lib/dpkg/info/compiz.config: backend: not found /var/lib/dpkg/info/compiz.config: 13: /var/lib/dpkg/info/compiz.config: integration: not found /var/lib/dpkg/info/compiz.config: 14: /var/lib/dpkg/info/compiz.config: plugin_list_autosort: not found /var/lib/dpkg/info/compiz.config: 15: /var/lib/dpkg/info/compiz.config: profile: not found

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  • Custom Russian Phonetic Keyboard

    - by roman
    I tried to custom Russian phonetic keyboard through Terminal. To do this I wrote: cd /usr/share/X11/xkb/symbols/ then: sudo gedit ru The document " ru (/usr/share/X11/xkb/symbols) - gedit " appeared on the desktop. I changed all the keys that suited me, saved the file and restarted the computer. However, the changes didn't work out. I checked the document again. The changes are there, but the keys still code for the old layout. I think I am missing some important point. Please help. By the way I get in Terminal this message: ** (gedit:14887): WARNING **: Could not load Gedit repository: Typelib file for namespace 'GtkSource', version '3.0' not found (gedit:14887): IBUS-WARNING **: The owner of /home/roma/.config/ibus/bus is not root! What does this mean?

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  • Spread windows not working on minimized applications

    - by Jeggy
    When I'm using "SUPER" + "W" to spread all running windows I only see the applications that are not minimized and the others are just nothing as seen on picture below. I have 5 applications running and 3 of them are minimized and this is how it looks: How to fix this? I don't know if this is a bug or if this is normal, but i don't like it this way UPDATE: Just found out that it actually only happens when i use "Super" + "D" to minimize all windows, and then when opening some of them up again it will happen

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  • Learning the command line [duplicate]

    - by Billy
    This question already has an answer here: What is the best way to learn how to use Ubuntu with terminal? 3 answers This isn't really a technical question but I am curious as to how long it takes to learn the linux command line. I would like to learn how to be able to do as much as possible easily from the command line. I just bought a book, linux command line and shell scripting bible. I know that this book will be of great help, but i just have no clue how long it will be before i can successfully naviagte the terminal with ease. If you could post and let me know about your experience with the terminal, and the learning process, that would be greatly appreciated. Thank you in advance.

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  • Converting from mp4 to Xvid avi using avconv?

    - by Ricardo Gladwell
    I normally use avidemux to convert mp4s to Xvid AVI for my Philips Streamium SLM5500. Normally I select MPEG-4 ASP (Xvid) at Two Pass with an average bitrate f 1500kb/s for video and AC3 (lav) audio and it converts correctly. However, I'm trying to using avconv so I can automate the process with a script, but when I do this the video stutters and stops playing part way through. I have a suspicion its something to do with a faulty audio conversion. The commands I'm using are as follows: avconv -y -i video.mp4 -pass 1 -vtag xvid -c:a ac3 -b:a 128k -b:v 1500k -f avi /dev/null avconv -y -i video.mp4 -pass 2 -vtag xvid -c:a ac3 -b:a 128k -b:v 1500k -f avi video.avi There is a bewildering array of arguments for avconv. Is there something I'm doing wrong? Is there a way I can script avidemux from a headless server? Please see command line output: $ avconv -y -i video.mp4 -pass 1 -vtag xvid -an -b:v 1500k -f avi /dev/null avconv version 0.8.5-6:0.8.5-0ubuntu0.12.10.1, Copyright (c) 2000-2012 the Libav developers built on Jan 24 2013 14:49:20 with gcc 4.7.2 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4': Metadata: major_brand : isom minor_version : 1 compatible_brands: isomavc1 creation_time : 2013-02-04 13:53:38 Duration: 00:44:09.16, start: 0.000000, bitrate: 669 kb/s Stream #0.0(und): Video: h264 (High), yuv420p, 720x404 [PAR 1:1 DAR 180:101], 538 kb/s, 25 fps, 25 tbr, 100 tbn, 50 tbc Metadata: creation_time : 2013-02-04 13:53:38 Stream #0.1(und): Audio: ac3, 44100 Hz, stereo, s16, 127 kb/s Metadata: creation_time : 2013-02-04 13:53:42 [buffer @ 0x7f4c40] w:720 h:404 pixfmt:yuv420p Output #0, avi, to '/dev/null': Metadata: major_brand : isom minor_version : 1 compatible_brands: isomavc1 creation_time : 2013-02-04 13:53:38 ISFT : Lavf53.21.1 Stream #0.0(und): Video: mpeg4, yuv420p, 720x404 [PAR 1:1 DAR 180:101], q=2-31, pass 1, 1500 kb/s, 25 tbn, 25 tbc Metadata: creation_time : 2013-02-04 13:53:38 Stream mapping: Stream #0:0 -> #0:0 (h264 -> mpeg4) Press ctrl-c to stop encoding frame=66227 fps=328 q=2.0 Lsize= 0kB time=2649.16 bitrate= 0.0kbits/s video:401602kB audio:0kB global headers:0kB muxing overhead -100.000000% $ avconv -y -i video.mp4 -pass 2 -vtag xvid -c:a ac3 -b:a 128k -b:v 1500k -f avi video.avi avconv version 0.8.5-6:0.8.5-0ubuntu0.12.10.1, Copyright (c) 2000-2012 the Libav developers built on Jan 24 2013 14:49:20 with gcc 4.7.2 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4': Metadata: major_brand : isom minor_version : 1 compatible_brands: isomavc1 creation_time : 2013-02-04 13:53:38 Duration: 00:44:09.16, start: 0.000000, bitrate: 669 kb/s Stream #0.0(und): Video: h264 (High), yuv420p, 720x404 [PAR 1:1 DAR 180:101], 538 kb/s, 25 fps, 25 tbr, 100 tbn, 50 tbc Metadata: creation_time : 2013-02-04 13:53:38 Stream #0.1(und): Audio: ac3, 44100 Hz, stereo, s16, 127 kb/s Metadata: creation_time : 2013-02-04 13:53:42 [buffer @ 0x12b4f00] w:720 h:404 pixfmt:yuv420p Incompatible sample format 's16' for codec 'ac3', auto-selecting format 'flt' [mpeg4 @ 0x12b3ec0] [lavc rc] Using all of requested bitrate is not necessary for this video with these parameters. Output #0, avi, to 'video.avi': Metadata: major_brand : isom minor_version : 1 compatible_brands: isomavc1 creation_time : 2013-02-04 13:53:38 ISFT : Lavf53.21.1 Stream #0.0(und): Video: mpeg4, yuv420p, 720x404 [PAR 1:1 DAR 180:101], q=2-31, pass 2, 1500 kb/s, 25 tbn, 25 tbc Metadata: creation_time : 2013-02-04 13:53:38 Stream #0.1(und): Audio: ac3, 44100 Hz, stereo, flt, 128 kb/s Metadata: creation_time : 2013-02-04 13:53:42 Stream mapping: Stream #0:0 -> #0:0 (h264 -> mpeg4) Stream #0:1 -> #0:1 (ac3 -> ac3) Press ctrl-c to stop encoding Input stream #0:1 frame changed from rate:44100 fmt:s16 ch:2 to rate:44100 fmt:flt ch:2 frame=66227 fps=284 q=2.2 Lsize= 458486kB time=2649.13 bitrate=1417.8kbits/s video:413716kB audio:41393kB global headers:0kB muxing overhead 0.741969%

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  • How do I create an encrypted file system inside a file?

    - by darent
    Recently i've found this interesting tutorial: http://flossstuff.wordpress.com/2011/08/07/using-a-file-as-a-storage-device/ It explains how to create an empty file, format it as ext4, and mount it as a device. I'd like to know if it can be created as an encrypted ext4 file system. I've tried using palimpsest (the disk utility found in System menu) to format the already created file system but it doesn't works as it detects the file system being used. If I try to unmount the file system, it won't work neither because it doesn't detect the device (since it's not a real device like a hardrive or a usb drive). So my question is, is there an option to create the file system encrypted from the begining? I've used these commands: Create an empty file 200Mb size: dd if=/dev/zero of=/path/to/file bs=1M count=200 Make it ext4: mkfs -t ext4 file Mount it in a folder inside my home: sudo mount -o loop file /path/to/mount_point Is there any way the mkfs command creates the ext4 encrypted asking for a decryption password? I'm planing to use this as a way to encrypt files inside Dropbox. Thanks for your time.

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  • Uploading images to a post like on the stackexchange websites [on hold]

    - by Loko
    Stackexchange uses imgur link to show the image to their website, but how do I do this? I am really curious on what ways I can upload an image to a file and show it immediatly again. Like webshops where you can post your products are also uploading images to show them immediatly. What way are there to do this and what is the best / most secure?(I assume how stackexchange does it), but I also have no idea how to do that.

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  • Why google return soft 404 when I redirect on signup page?

    - by Hettomei
    Since one month, I've got an increased "soft 404" reported by google webmaster tools but work well for users. I made some fix but can't figure out how to solve it. Configuration (maybe useless): I have a website built with rails 3.1 Authentication is handled by the gem Devise Problem: On this page http://en.bemyboat.com/yacht-charter/9965-sailboat-beneteau-oceanis-43 when you click on "Ask a Boat request" (a simple form, in GET to : http://en.bemyboat.com/boat_requests/new/9965) you are redirected with the http status 302 to sign in, and then sent back to the new page if successfully sign in. Google tells me that the link on "ask a boat request" returns a soft 404. I can't make this form in "POST" (which will solve the problem) because we need to automatically redirect user to the good page after sign in. (the Gem Devise memorize the "get" link) To simplify, the question is: how to protect a private page with authentication, reached with a simple "get" and not to be penalized by google with "soft 404". Thank you. PS : this website suffer a lot about english translation... please don't care.

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  • Why will Google Analytics not allow our URL?

    - by Linda H
    In Google Analytics we're trying to add a property for each website of a WordPress multisite network. It works well for all of the sub-site but one. In the Default URL field we used the following: www.mywebsite.no/ - works www.mywebsite.no/nurse - works, as does a few other sub-sites www.mywebsite.no/doctor - doesn't work In the last case we get the following error: Value is not a valid domain. (e.g. example.com, www.example.com) We can't change the name of the sub-site but GA just won't accept the URL. Why is this and what can we do to solve this?

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  • Should my URLs be lowercase?

    - by Rowan Freeman
    According to this blog ("Understanding SEO Friendly URL Syntax Practices") I should change http://example.com/Hello-Dolly To http://example.com/hello-dolly The reasons given are: URLs, in general, are case-sensitive it will simplify any case sensitive SEO and analytics reports According to this GIF that I found on Wikipedia's article on URL Normalization I should convert my URLs from any uppercase to all lowercase. However I use ASP.NET MVC4 and by default my URLs are structured like this (CamelCase): http://www.domain.com/Controller/Action/Parameter http://www.greatsite.com/Categories/List/Bicycles I've skimmed through the RFC1738 but I didn't see any definitive answers to this. Should I go out of my way to force the framework to change everything to lower case? Why did Microsoft choose to design their framework like this if everybody is telling me to use lowercase?

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  • Transfer websites and domains to new server

    - by Albert
    We have currently around 40 websites and 80+ domains/sub-domains in a shared 1&1 hosting package, and we just acquired a managed dedicated server with 1&1 as well. Now it's time to start transferring everything over to the new server. Transferring just the websites and databases wouldn't be a problem, it would take time but it's pretty straight forward. The problem comes when transferring the domains, let me explain why. Many of the websites we have are accessible via sub-domains of a parent domain. Ideally, we would like to transfer the sites one by one, in order to check for each one that everything works fine in the new server. However, since we also need to transfer the domain so it's managed in the new server, once we do that means that all the websites using that domain need to be already in the new server before transferring that domain, thus not allowing the "one by one" philosophy. Another issue is the downtime when transferring the domain, from the moment it stops working in the hosting package and becomes active in the new server. I believe there's nothing we can do here. So my question is if there's any way we can do the "one by one" transferring of the websites (and their corresponding sub-domains) in the circumstances described above. One idea I had would be: 1. Let's say we have website A, which is accessible using subdomain.mydomain.com (and there are many other websites accessible via other sub-domains of mydomain.com) 2. Transfer the files of website A to the new server 3. Point a test domain in the new server to the website A's folder (the new server comes with a "test" domain) 4. Test if website A works with that "test" domain 5. In the old hosting, somehow point the real sub-domain (subdomain.mydomain.com) to the new location of website A, in a way that user always see the same URL as always 6. Repeat 2-5 for every website belonging to the same domain 7. Once all are working in the new server, do the actual transfer of the domain to the new server, and then re-create all the sub-domains and point them to their corresponding website That way, users wouldn't notice that there's been a change (except for a small down time of the websites when doing the domain transfer). The part I'm not sure about is point 5 of the above. Is there any way to do that? I mean do it in a way that users see the original domain all the time in their browser, even for internal pages (so not only for the "home page", which would be sub-domain.mydomain.com, but also for example for the contact page, which would be sub-domain.mydomain.com/contact.php). Is there any way to do this? Or are we SOL and we're going to have to transfer all at the same time?

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  • CPanel - Wild card SSL - How to point *.domain.com to one root and sub.domain.com to another root

    - by Harry Muscle
    I have a wildcard (*.domain.com) SSL certificate installed on my CPanel server. I have domain.com configured to point to /domain.com as its document root and use this wildcard SSL certificate. I also have sub.domain.com configured to point to /sub.domain.com as its document root. Btw, I have not explicitly configured configured sub.domain.com to use the wildcard SSL certificate. When I go to "http://sub.domain.com" it goes to the correct document root, however my problem is that when I go to "https://sub.domain.com" it goes to the incorrect root, it goes to the root configured for the wildcard SSL. I've been trying to find information on how to go about configuring sub.domain.com to use the SSL certificate and go to the correct document root, however, so far I haven't found anything concrete. Do I use the same steps that I used for configuring the certificate for domain.com, but use the same certificate again and specify dev.domain.com as the domain that this certificate is for (instead of *.domain.com)? Or is there something else I should be doing? This is a production server, so I don't want to play around too much. I'm hoping to find the correct information before proceeding.

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  • Will loading meta tags dynamically from a database hurt the site?

    - by Nalaka526
    I have a website (ASP.NET MVC) which has its contents mainly in Sinhala language. So the search engines will list my site only when someone searches for Sinhala words. But,I need to list my site's pages in search results when searched with appropriate English words too. So I'm planning to save HTML meta tags (in English) in database and load them dynamically with appropriate page contents. Will loading the meta tags dynamically affect the site adversely?

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  • Standard ratio of cookies to "visitors"?

    - by Jeff Atwood
    As noted in a recent blog post, We see a large discrepancy between Google Analytics "visitors" and Quantcast "visitors". Also, for reasons we have never figured out, Google Analytics just gets larger numbers than Quantcast. Right now GA is showing more visitors (15 million) on stackoverflow.com alone than Quantcast sees on the whole network (14 million): Why? I don’t know. Either Google Analytics loses cookies sometimes, or Quantcast misses visitors. Counting is an inexact science. We think this is because Quantcast uses a more conservative ratio of cookies-to-visitors. Whereas Google Analytics might consider every cookie a "visitor", Quantcast will only consider every 1.24 cookies a "visitor". This makes sense to me, as people may access our sites from multiple computers, multiple browsers, etcetera. I have two closely related questions: Is there an accepted standard ratio of cookies to visitors? This is obviously an inexact science, but is there any emerging rule of thumb? Is there any more accurate way to count "visitors" to a website other than relying on browser cookies? Or is this just always going to be kind of a best-effort estimation crapshoot no matter how you measure it?

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  • Multilingual Publishing Pack (MLP): make a link to the corresponding page in the another language?

    - by lyle
    I am helping to build a bilingual website using MLP on TextPattern. It's trivial to put a link to the top level page of another language, but how to put a link to the current page in another language? Eg. /en/contact should link to /de/kontakt (the same article in another language). I'm sure there are some variables somewhere that I could put into the template that would be filled with the correct links.

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  • How exactly to implement multiple threads in a game

    - by xerwin
    So I recently started learning Java, and having a interest in playing games as well as developing them, naturally I want to create game in Java. I have experience with games in C# and C++ but all of them were single-threaded simple games. But now, I learned how easy it is to make threads in Java, I want to take things to the next level. I started thinking about how would I actually implement threading in a game. I read couple of articles that say the same thing "Usually you have thread for rendering, for updating game logic, for AI, ..." but I haven't (or didn't look hard enough) found example of implementation. My idea how to make implementation is something like this (example for AI) public class AIThread implements Runnable{ private List<AI> ai; private Player player; /*...*/ public void run() { for (int i = 0; i < ai.size(); i++){ ai.get(i).update(player); } Thread.sleep(/* sleep until the next game "tick" */); } } I think this could work. If I also had a rendering and updating thread list of AI in both those threads, since I need to draw the AI and I need to calculate the logic between player and AI(But that could be moved to AIThread, but as an example) . Coming from C++ I'm used to do thing elegantly and efficiently, and this seems like neither of those. So what would be the correct way to handle this? Should I just keep multiple copies of resources in each thread or should I have the resources on one spot, declared with synchronized keyword? I'm afraid that could cause deadlocks, but I'm not yet qualified enough to know when a code will produce deadlock.

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  • Difference between Sound and Music

    - by Southpaw Hare
    What are the key differences between the Sound and Music classes in Pygame? What are the limitations of each? In what situation would one use one or the other? Is there a benefit to using them in an unintuitive way such as using Sound objects to play music files or visa-versa? Are there specifically issues with channel limitations, and do one or both have the potential to be dropped from their channel unreliably? What are the risks of playing music as a Sound?

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  • what are the problems in game development that requires scientific research? [on hold]

    - by Anmar
    I been into Game Development for approximately 2 years for now mostly prototype development and testing ideas. Im in a point of my carrier where I am in a need to publish a research paper I would love to start doing research about game development however my lack of experience in actual game development in a commercial set of environment brings me into Game development in stackexchange My question is for the experience game developers out there What are the problems related to software engineering that you have faced or your team faced while developing games? Example Problems ? The lack of a strong technique for Fun detection in a game in an early stage of development A strong tailored Software Development Life Cycle for game development Agile methodology as a game development methodology Narrowing the goals gap between team members (Editors, Story Designers, Programmers, 3D artists, 2D Artists) - Community Suggestions Indie game marketing requirements for success by Yakyb Any problems you could define it I would be more than happy to take it into consideration for future research. My experience and work mostly involve process related basically SDLC (Waterfall, Spiral, Agile, RUP .Etc) Thank you for any input.

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  • Z axis trouble with glTranslatef(...) - LWJGL

    - by Zarkopafilis
    Here is the code: private static boolean up = true , down = false , left = false , right = false, reset = false, in = false , out = false; public void start() { try { Display.setDisplayMode(new DisplayMode(800,600)); Display.create(); } catch (LWJGLException e) { e.printStackTrace(); System.exit(0); } GL11.glMatrixMode(GL11.GL_PROJECTION); GL11.glLoadIdentity(); GL11.glOrtho(0, 800, 0, 600, 0.00001f, 1000); GL11.glMatrixMode(GL11.GL_MODELVIEW); Keyboard.enableRepeatEvents(true); while (!Display.isCloseRequested()) { GL11.glClear(GL11.GL_COLOR_BUFFER_BIT); input(); if(up){ GL11.glTranslatef(0,0.1f,0); } if(down){ GL11.glTranslatef(0,-0.1f,0); } if(left){ GL11.glTranslatef(-0.1f,0,0); } if(right){ GL11.glTranslatef(0.1f,0,0); } if(in){ GL11.glTranslatef(0, 0, 1f); } if(out){ GL11.glTranslatef(0, 0, -1f); } if(reset){ GL11.glLoadIdentity(); } GL11.glBegin(GL11.GL_QUADS); GL11.glColor3f(255, 255, 255); GL11.glVertex3f(800/2, 600/2, 0); GL11.glVertex3f(800/2 + 200, 600/2, 0); GL11.glVertex3f(800/2 + 200, 600/2 + 200, 0); GL11.glVertex3f(800/2, 600/2 + 200, 0); GL11.glColor3f(0, 255, 0); GL11.glVertex3f(800/2, 600/2, 1); GL11.glVertex3f(800/2 + 200, 600/2, 1); GL11.glVertex3f(800/2 + 200, 600/2 + 200, 1); GL11.glVertex3f(800/2, 600/2 + 200, 1); GL11.glEnd(); Display.update(); } Display.destroy(); } public static void main(String[] argv){ new main().start(); } public void input(){ up = false; down = false; left = false; right = false; reset = false; in = false; out = false; if(Keyboard.isKeyDown(Keyboard.KEY_SPACE)){ reset = true; } if(Keyboard.isKeyDown(Keyboard.KEY_W)){ up = true; } if(Keyboard.isKeyDown(Keyboard.KEY_S)){ down = true; } if(Keyboard.isKeyDown(Keyboard.KEY_A)){ left = true; } if(Keyboard.isKeyDown(Keyboard.KEY_D)){ right = true; } if(Keyboard.isKeyDown(Keyboard.KEY_Q)){ in = true; } if(Keyboard.isKeyDown(Keyboard.KEY_E)){ out = true; } } As you can see I am creating 2 quads , a white one at z 0 and a green one at z 1. WASD keys function correctly. Also when I hit SPACEBAR the white quad is being shown. If I then press E , I can see the green quad. But if I press Q afterwards , I dont see the white one again!(Space Works everytime). Also if I render the green one at Z = -1 everything works perfectly BUT you may need up to 3 key presses Q/E to see the other quad. Why is that happening?

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  • How to calculate new velocities between resting objects (AABB) after accelerations?

    - by Tiedye
    lately I have been trying to create a 2D platformer engine in C++ with Direct2D. The problem I am currently having is getting objects that are resting against each other to interact correctly after accelerations like gravity have been applied to them. Right now I can detect collisions and respond to them correctly (I think) and when objects collide they remember what other objects they're resting against so objects can be pushed by other objects (note that there is no bounce in any collisions so when objects collide they are guaranteed to become resting until something else happens). Every time the simulation advances, the acceleration for objects is applied to their velocities (for example vx += ax * t, where t is time elapsed since last advancement). After these accelerations are applied, I want to check if any objects that are resting against each other are moving at different speeds than their counterparts (as different objects can have different accelerations) and depending on that difference either unlink the two objects so they are no longer resting, or even out their velocities so they are moving at the same speed once again. I am having trouble creating an algorithm that can do this across many resting objects. Here's a diagram to help explain my problem

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  • Basic Connections Through Socket Server

    - by Walrus
    I'm designing a simple 2 player RTS with Stencyl, a program that uses blocks for coding. The current code updates lists whenever an actor moves (new X and Y), and I'd want the server to update the game state with each change to the list. However, to start off: I don't even know how to set up a socket server. Stencyl has taught me the basics of logic, but I've yet to learn any programming languages. I've downloaded a Smartfox 2X socket server that I'm intending to use. Right now I'm only looking to make baby steps; I want to do something to this effect: "When someone connects to the server, open insert file here". How can I do this? My intention is to have this file be the game client. Is this "open file when connected" method the best way to go about this? When answering: assume that I know nothing, because really, though I have done research (I know that UDPTCP for real time), implementation-wise I know nothing.

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  • Should the networking of my game be a component or a service?

    - by aalcutt
    I am working on a windows game and I am trying to understand the XNA GameComponents and GameServices classes and use. From what I understand about a component is that it has an Update method that gets call in every frame, and a service can be referenced from other components if needed. So the way I think a network component would work is that in its Update method it would receive and send data. It probably makes sense to receive the network data once per frame, but it doesn't for sending it. Shouldn't the game send its own updates to others the moment it has it to cut down on lag?

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