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  • How can I check Internet connectivity in a console?

    - by Ashfame
    Is there an easy way to check Internet connectivity from console? I am trying to play around in a shell script. One idea I seem is to wget --spider http://www.google.co.in/ and check the HTTP response code to interpret if the Internet connection is working fine. But I think there must be easy way without the need of checking a site that never crash ;) Edit: Seems like there can be a lot of factors which can be individually examined, good thing. My intention at the moment is to check if my blog is down. I have setup cron to check it every minute. For this, I am checking the HTTP response code of wget --spider to my blog. If its not 200, it notifies me (I believe this will be better than just pinging it, as the site may under be heavy load and may be timing out or respond very late). Now yesterday, there was some problem with my Internet. LAN was connected fine but just I couldn't access any site. So I keep on getting notifications as the script couldn't find 200 in the wget response. Now I want to make sure that it displays me notification when I do have internet connectivity. So, checking for DNS and LAN connectivity is a bit overkill for me as I don't have that much specific need to figure out what problem it is. So what do you suggest how I do it?

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  • I prefer C/C++ over Unity and other tools: is it such a big downer for a game developer?

    - by jokoon
    We have a big game project using Unity at school. There are 12 of us working on it. My teacher seems to be convinced it's an important tool to teach students, since it makes students look from the high level to the lower level. I can understand his view, and I'm wondering: Is unity such an important engine in game development companies? Are there a lot of companies using it because they can't afford to use something else? He is talking like Unity is a big player in game making, but I only see it fit small indie game companies who want to do a game as fast as possible. Do you think Unity is of that much importance in the industry? Does it endanger the value of C++ skills? It's not that I don't like Unity, it's just that I don't learn anything with it, I prefer to achieve little steps with Ogre or SFML instead. Also, we also have C++ practice exercises, but those are just practice with theory, nothing much.

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  • How would one go about integrated python into a c++ written game for the use of user-made scripts

    - by Spencer Killen
    I'm quite new to game development (not the site) and I'm currently just trying to educate myself about some certain things before I really begin working and a game. anyway, I'd like to know what basic algorithm/outline of how a game would be coded effeciently with the implementation of user coded scripts for gameplay and levels that are written in python, Is this even possible? would all the features of python be avalible? like say "multi-threading"?

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  • Function inside .profile results in no log-in

    - by bioShark
    I've created a custom function in my .profile, and I've added right at the bottom, after my custom aliases : # custom functions function eclipse-gtk { cd ~/development/eclipse-juno ./eclipse_wb.sh & cd - } The function starts a custom version of my eclipse. After I've added it, because I didn't wanted to log-out/log-in, I've reloaded my profile with the command: . ~/.profile and then I've tested my function by calling eclipse-gtk and it worked without any issue. Today when I booted, I couldn't log in. After providing my password, in a few seconds I was back at the log-in screen. Dropping to command line using CTR + ALT + F1, I've commented out the function in my .profile and the log-in was possible without any issue. My question is, what did I do wrong when I wrote the function? And if there is something wrong, why did it work yesterday after reloading the profile. Thanks in advance. Using: Ubuntu 12.04

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  • Script Task/Component and Template Information

    The Script Task and Script component are often used by people developing SSIS packages because they are easy to use and now because SSIS could be perceived to be more developer friendly they are very powerful. That being said we should no be using them everywhere.  There are generally Tasks/Components already provided that will do the job it may be that we have to rethink the way we want to draw our package. I had cause last week to break out the script component in SQL Server 2008 SP1 and found that it was broken.  I don’t know when it broke as I do not use them all that often.  My error was as below.     Something must have overwritten this template information.  I looked in Event Viewer and tried the things it suggested but the templates still did not work.  Here is how I got them eventually to work for me (Your Mileage may vary) Open up a Command Prompt window using an administrator level account and “as an administrator” vsta.exe /hostid SSIS_ScriptTask /setup vsta.exe /hostid SSIS_ScriptComponent /setup   This worked for me.  Hope it helps.

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  • Add "not" to if statement in shell script

    - by John Crawford
    I have the following script that should exist if the user does not exist. #check if user currently exists on system if id $User > /dev/null 2>&1 then #user exists no need to exit program echo "blah blah, what a waste of space" else echo "This user does NOT exists. Please create that user before using this script.\n" exit fi My problem is that I would ideally like to place a "not" if that first if statement so that I can trim down my if, else statement. Ideally I would like something like this: if !(id $User > /dev/null 2>&1) then echo "This user does NOT exists. Please create that user before using this script.\n" exit fi

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  • How to design a scriptable communication emulator?

    - by Hawk
    Requirement: We need a tool that simulates a hardware device that communicates via RS232 or TCP/IP to allow us to test our main application which will communicate with the device. Current flow: User loads script Parse script into commands User runs script Execute commands Script / commands (simplified for discussion): Connect RS232 = RS232ConnectCommand Connect TCP/IP = TcpIpConnectCommand Send data = SendCommand Receive data = ReceiveCommand Disconnect = DisconnectCommand All commands implement the ICommand interface. The command runner simply executes a sequence of ICommand implementations sequentially thus ICommand must have an Execute exposure, pseudo code: void Execute(ICommunicator context) The Execute method takes a context argument which allows the command implementations to execute what they need to do. For instance SendCommand will call context.Send, etc. The problem RS232ConnectCommand and TcpIpConnectCommand needs to instantiate the context to be used by subsequent commands. How do you handle this elegantly? Solution 1: Change ICommand Execute method to: ICommunicator Execute(ICommunicator context) While it will work it seems like a code smell. All commands now need to return the context which for all commands except the connection ones will be the same context that is passed in. Solution 2: Create an ICommunicatorWrapper (ICommunicationBroker?) which follows the decorator pattern and decorates ICommunicator. It introduces a new exposure: void SetCommunicator(ICommunicator communicator) And ICommand is changed to use the wrapper: void Execute(ICommunicationWrapper context) Seems like a cleaner solution. Question Is this a good design? Am I on the right track?

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  • Escaping In Expressions

    The expressions language is a C style syntax, so you may need to escape certain characters, for example: "C:\FolderPath\" + @VariableName Should be "C:\\FolderPath\\" + @VariableName Another use of the escape sequence allows you to specify character codes, like this \xNNNN, where NNNN is the Unicode character code that you want. For example the following expression will produce the same result as the previous example as the Unicode character code 005C equals a back slash character: "C:\x005CFolderPath\x005C" + @VariableName For more information about Unicode characters see http://www.unicode.org/charts/ Literals are also supported within expressions, both string literals using the common escape sequence syntax as well as modifiers which influence the handling of numeric values. See the "Literals (SSIS)":http://msdn2.microsoft.com/en-US/library/ms141001(SQL.90).aspx topic. Using the Unicode escaped character sequence you can make up for the lack of a CHAR function or equivalent.

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  • Fedora 13 étend la virtualisation Linux, la distribution s'appuie sur de nouvelles fonctionnalités K

    Mise à jour du 10.05.2010 par Katleen Fedora 13 étend la virtualisation Linux, la distribution s'appuie sur de nouvelles fonctionnalités KVMM Fedora, la distribution Linux de Red Hat, s'est portée très tôt sur la virtualisation. Dès sa version 4, sortie en 2005, ces technologies ont été incluses et améliorées au sein du produit. Fedora 13, a sortir ce mois-ci, continuera dans cette lignée. Paul Frields, chef de projet Fedora, explique ainsi que la distribution à toujours été "l'avant-garde de la virtualisation" en utilisant KVM "bien avant les autres". Car Fedora, en abandonnant Xen pour KVM, a fait un pas en avant niveau performances et stabilité. Fe...

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  • Should NPC dialog be stored in XML or in a script?

    - by Andrea Tucci
    I'm developing an action RPG with some friends. I would like to know the differences and pros/cons of making NPC's dialogue using a file in XMLformat instead of using a script. I see that script method is often used by game developers for NPC text, but is it better then a XML file? We've thought that a XML file with tags like <FirstText>[text1]<SecondText>[text2] et cetera is perfect for NPC text and also for possible quests to give the player. So what are the differences between this two methods? Is a script suitable for this aim?

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  • Ubuntu 10.04 LTS consomme plus d'énergie que Windows 7, la distribution Linux est-elle trop gourmand

    Ubuntu 10.04 LTS consomme plus d'énergie que Windows 7, la distribution Linux est-elle trop gourmande ? Ubuntu 10.04 LTS est une distribution Linux mobile, optimisée pour les ordinateurs portables et les netbooks. C'est du moins ainsi qu'elle est présentée. Mais les tests réalisés par des journalistes américains démontrent plutôt le contaire. La consommation électrique de deux ordinateurs portables fonctionnant sous Windows 7 et l'Ubuntu 10.04 LTS a été mesurée et comparée. Il s'agissait d'un Asus Eee PC 1201N (Intel Atom 330 et solution graphique NVIDIA GeForce 9400M) et d'un Lenovo ThinkPad T61 (Intel Core 2 Duo T9300 et une carte graphique NVIDIA Quadro NVS 140M). Les tests ont été effectués avec le pilote graphique d'origine et...

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  • Canon MG6100 series USB printer receives job but doesn't physically print

    - by Old-linux-fan
    Printer MP6150 driver installed itself upon plugging in the printer. Printer is recognized (lsusb shows it) but does not mount. If the printer is recognized, the driver must be working (or?), but something is blocking the system from mounting the printer. Tried the usual things: power of printer, restart Ubuntu etc. Listed below result of lsusb and fstab: hans@kontor-linux:~$ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 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 Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 004: ID 04a9:174a Canon, Inc. Bus 002 Device 002: ID 1058:1001 Western Digital Technologies, Inc. External Hard Disk [Elements] Bus 004 Device 002: ID 046d:c517 Logitech, Inc. LX710 Cordless Desktop Laser hans@kontor-linux:~$ sudo cat /etc/fstab [sudo] password for hans: # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda6 during installation UUID=eaf3b38d-1c81-4de9-98d4-3834d674ff6e / ext4 errors=remount-ro 0 1 # swap was on /dev/sda5 during installation UUID=93a667d3-6132-45b5-ad51-1f8a46c5b437 none swap sw 0 0

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  • Unity - Invert Movement Direction

    - by m41n
    I am currently developing a 2,5D Sidescroller in Unity (just starting to get to know it). Right now I added a turn-script to have my character face the appropriate direction of movement, though something with the movement itself is behaving oddly now. When I press the right arrow key, the character moves and faces towards the right. If I press the left arrow key, the character faces towards the left, but "moon-walks" to the right. I allready had enough trouble getting the turning to work, so what I am trying is to find a simple solution, if possible without too much reworking of the rest of my project. I was thinking of just inverting the movement direction for a specific input-key/facing-direction. So if anyone knows how to do something like that, I'd be thankful for the help. If it helps, the following is the current part of my "AnimationChooser" script to handle the turning: Quaternion targetf = Quaternion.Euler(0, 270, 0); // Vector3 Direction when facing frontway Quaternion targetb = Quaternion.Euler(0, 90, 0); // Vector3 Direction when facing opposite way if (Input.GetAxisRaw ("Vertical") < 0.0f) // if input is lower than 0 turn to targetf { transform.rotation = Quaternion.Lerp(transform.rotation, targetf, Time.deltaTime * smooth); } if (Input.GetAxisRaw ("Vertical") > 0.0f) // if input is higher than 0 turn to targetb { transform.rotation = Quaternion.Lerp(transform.rotation, targetb, Time.deltaTime * smooth); } The Values (270 and 90) and Axis are because I had to turn my model itself in the very first place to face towards any of the movement directions.

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  • Split a text file by its entries

    - by Alexx Hardt
    Hi, I'm trying to analyze an enormous text file (1.6GB), whose data lines look like this: 20090118025859 -2.400000 78.100000 1023.200000 0.000000 20090118025900 -2.500000 78.100000 1023.200000 0.000000 20090118025901 -2.400000 78.100000 1023.200000 0.000000 I don't even know how many lines there are. But I'm trying to split the file by date. The left number is a time stamp (these lines are from 2009, January 18th). How can I split this file into pieces according to the date? Everything I know would be to grep file '20090118*' > data20090118.dat , but there sure is a way to do all the dates at once, right? The number of entries per date differ, so using split with a constant number won't work. Thanks in advance, Alex

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  • How can I save state from script in a multithreaded engine?

    - by Peter Ren
    We are building a multithreaded game engine and we've encountered some problems as described below. The engine have 3 threads in total: script, render, and audio. Each frame, we update these 3 threads simultaneously. As these threads updating themselves, they produce some tasks and put them into a public storage area. As all the threads finish their update, each thread go and copy the tasks for themselves one by one. After all the threads finish their task copying, we make the threads process those tasks and update these threads simultaneously as described before. So this is the general idea of the task schedule part of our engine. Ok, well, all the task schedule part work well, but here's the problem: For the simplest, I'll take Camera as an example: local oldPos = camera:getPosition() -- ( 0, 0, 0 ) camera:setPosition( 1, 1, 1 ) -- Won't work now, cuz the render thread will process the task at the beginning of the next frame local newPos = camera:getPosition() -- Still ( 0, 0, 0 ) So that's the problem: If you intend to change a property of an object in another thread, you have to wait until that thread process this property-changing message. As a result, what you get from the object is still the information in the last frame. So, is there a way to solve this problem? Or are we build the task schedule part in a wrong way? Thanks for your answers :)

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  • Connect android to linux laptop

    - by Claudio Ferraro
    I've a laptop with linux and wanna to connect an android device to the linux machine. On linux i have an mpd server installed. wanna to be able to connect from an android mpd client to the server which resides on the laptop. I tryed to create an Ad-hoc Wifi network on linux but the Android cannot find the Wifi network..How can I proceed..Should I buy a wifi access point or something like that ? I've a wifi router , it could help me somehow ?

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  • Should extension scripts be run in a sandbox?

    - by Cubic
    In particular, this is about game extensions written in lua (luajit-2.0). I was contemplating whether I should restrict what these scripts can do, and arrived at the conclusion that I probably shouldn't: It's hard to get right. Sounds silly, but chances are my sandbox is gonna end up leaky anyways. The only benefit I could think of would be giving users some sense of security when running third party scripts. The disadvantages would be that it's just incredibly annoying for extension writers. That is, for now, myself (game content will be mostly scripted). The reason I'm asking this now before I actually have anything presentable is that adding a sandbox early on is easy, but would impose said annoying restrictions on myself too. However if I first go on with it and then later decide I do need a sandbox after all, I'm gonna run into problems (I'd either have to rewrite the scripts that are already there, or introduce some form of trust management system which seems to be more trouble than it's worth).

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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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  • md5deep error with after compression and extraction

    - by Sai
    I am using md5deep to generate the checksum for the contents of an entire directory. After generation, if I use the checksum file and run a check, there are no errors. However, if I compress the file and extract it, it seems to generate an error about a missing file. The file is just called .md5. There is no file called .md5 inside the directory. It seems to create a file that is not existent. This problem exists when I use md5sum or md5deep. Any thoughts on why this is happening?

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