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  • enemy behavior with boundary to change direction

    - by BadSniper
    I'm doing space shooter kind of game, the logic is to reflect the enemy if it hits the boundary. With my logic, sometimes enemy behaves like flickering instead of changing the velocity. It's like trapped in the boundary and checking for if loops. This is my code for velocity changing: if(this->enemyPos.x>14) { this->enemyVel.x = -this->enemyVel.x; } if(this->enemyPos.x<-14) { this->enemyVel.x = -this->enemyVel.x; } How can I get around this? Its going out of boundary and don't know where to go and after sometimes its coming into field. I know whats the problem is, I dont know how to get around this problem.

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  • I can't get a native resolution of 1920x1080 on 11.10 (AOC f22 on a Nvidia Geforce GTS 450)

    - by Mikeeeee
    I have a problem were the highest resolution I can get is 1360x769, this is a 22 inch LCD monitor with a native resolution of 1920x1080_60 I have tried numerous drivers but nothing changed I tried editing the xorg.conf scipt with no success (I am a noob with linux though). Running many commands in terminal witch I got from people with similar problems only gives me errors like "Failed to get size of gamma for output default. I get edid checksum is invalid error on boot down also. I think there maybe a communication problem between my screens EDID and ubuntu although xp and windows 7 detect my screen without any errors and automatically set native resolution. also when I am installing ubuntu I get a horrible screen flashing every few seconds until I have installed the nvidia driver. pc specks if it helps x64 os, mainboard N68PV-GS, 4 gig ram, AMD Phenom(tm) 9350e Quad-Core Processor × 4, Nvidia Geforce gts450 512mb, hard drives set up in a onboard nvidia raid array striped. realy need to get a better resolution, 1360x769 does not look nice on a 22 inch screen. ty

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  • Fixing a broken toolbox (In Visual Studio 2010 SP1)

    - by mbcrump
    I was recently running into a situation where every time I opened Visual Studio 2010 SP1, the following message would appear for about 60 seconds or so: "Loading toolbox content from package Microsoft.VisualStudio.IDE.Toolbox.ControlInstaller.ToolboxInstallerPackage '{2C98B35-07DA-45F1-96A3-BE55D91C8D7A}'" After finally get fed up with the issue, I started researching it and decided that I’d share the steps that I took to resolve it below: I first made a complete backup of my registry. I then removed the following key: [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\10.0\Packages\{2c298b35-07da-45f1-96a3-be55d91c8d7a}] I went to the following directory: C:\Users\Your Name Here\AppData\Local\Microsoft\VisualStudio\10.0\ and created a folder called bk and moved the .tbd files to that folder (they are hidden so you will have to show all files). I then removed the .tbd files in the root directory. I then launched Visual Studio 2010 SP1 again and it recreated those files and the problem was gone. Anyways, I hope this helps someone with a similar problem. I created this blog partially for myself but it is always nice to help my fellow developer.  Thanks for reading. Subscribe to my feed

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  • Repeater vs. ListView

    - by MoezMousavi
    I do really hate repeater. I was more a GridView lover but after 3.5 be born, I prefer ListView.  The first problem with Repeater is paging. You will need to write code to handle paging. Second common problem is empty data template. Have a look at this:             if (rptMyRepeater.Items.Count < 1)             {                 if (e.Item.ItemType == ListItemType.Footer)                 {                     Label lblFooter = (Label)e.Item.FindControl("lblEmpty");                     lblFooter.Visible = true;                 }             }   I found the above code is usefull if you need to show something like "There is no record" is your data source has no records. Although the ListView has a template.   If you combine ListView with a DataPager, you will be in heaven as it is sorting the paging for you without writing code. (http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.datapager.aspx)     Note: You have got to bind ListView in PreRender, it doesn't work properly in PageLoad   More: http://www.4guysfromrolla.com/articles/061009-1.aspx

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  • Cron doesn't execute one of the scheduled jobs

    - by user288633
    I'm using a lubuntu desktop, distribution Ubuntu 13.10, i686. This is my problem: in the job list scheduled by cron a job hasn't effect, but in /var/log/syslog its execution is traced. This is the relative log line: Jun 4 09:06:01 kiosk CRON[14189]: (root) CMD (/usr/bin/xinput set-prop 12 --type=float "Coordinate Transformation Matrix" 0 -1 1 1 0 0 0 0 1 /tmp/mybackup.log) This job should rotate touchscreen mapping. I try different solutions: I substitute in crontab the with bash -c "", I set "export DISPLAY=:0.0" ("for Graphics related job in Unix Environment we need to set first the DISPLAY...") before the command,...and many other! I know there are a lots of details affect cron execution (path, environment variables, special character and other) and I have no more idea by now :( Could some gentleman suggest me an idea? where can I find the problem? Thanks in advance!

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  • Ubuntu 12.04 - no wireless network recognized

    - by Itai
    I just installed Ubntu 12.04 along with WIN7 on the same laptop - Dell Vostro-3560. Now, on Win7 i can access to different wi-fi networks. However, when i am logging onto the Ubuntu section (after re-starting my laptop) - an error message appears: "Disconnected - you are now offline". When i take a look at my network menu (in the upper bar on the screen), i see that no network is found (and i have a few of them in the area...). I tried to look around but really could not find a concrete practical solution to this specific problem, would appreciate any solution from anyone out there that had this problem and solved it. Thanks... Itai

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  • How do I read my PDFs and watch videos properly again?

    - by asp
    Whenever I watch videos, either online of local via Totem and/or open PDF files using evince. The system gets really, really bogged down. All apps get really slow, menus take forever to display, switching windows gives me time to make a coffee, etc. I have a couple of bug reports open on this, but what do I need to do to really troubleshoot the issue? I've purged Adobe Flash from the system, but YouTube HTML5 videos still have the issue. A bunch of PDFs saved locally trigger the problem. And to (temporarily) remove the slowness, I need to shutdown the computer, breath for a few minutes, then restart. A simple reboot does not do the trick. How can I identify the cause? This only started on 13.04. I've had Ubuntu on this machine for a year without a problem until "upgrading" to 13.04. I am not a programmer, but I suspect an issue with the Intel video driver.

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  • Why Firefox caching work will reset in version 3 but version 16 don't?

    - by huahsin68
    I am developing a web application and have the app deployed into Tomcat server. Tested on IE and Firefox and are working fine. Meaning when I close the browser and reopen the app, the data will be reset. When deploy to Websphere, the data is reset only in IE but Firefox don't. Meaning Firefox will cache the old data. I did try to clear the cache in FF but still failed. I did a test in FF3 and FF16, FF3 will reset the value but FF16 doesn't, I am just so curious why this could happened? Now I don't know whether this is my code problem or is actually the FF caching problem. Any clue on this?

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  • No desktop after installation of nvidia drivers

    - by hovmand
    I have a problem very similar to this guy: Desktop does not show when I installed nvidia drivers!. I have the same problem with the desktop not being present when I install choose the nvidia drivers from the software sources dialog. I've trie the answer mark as the solution, but this doesn't help me. Still get the same result / bug. I've also tried just to reconfigure it, like this guy says: http://ubuntuforums.org/showpost.php?p=12303179&postcount=4, but that didn't help me either. Then someone suggested that I should try Bumblebee. I followed the installation (https://wiki.ubuntu.com/Bumblebee#Installation) and after the reboot the resolution was still crappy, but this time the desktop did show up, but with bad graphics and I couldn't use optirun and it turned out that bumblebee couldn't start. I hope someone might know whats wrong or what I'm doing wrong. I have a Lenovo W520 with a nvidia Quadro FX 880M and I'm running ubuntu 12.10

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  • My desktop disappeared, how do I get it back?

    - by sunny
    I have Ubuntu 12.04 LTS. This morning when I logged into my Ubuntu, after login screen the complete desktop was empty, the only operation I could perform is right-click and open terminal. What I've tried: Ctrl+Alt+F1 unity --reset : didn't work From terminal unity --reset : didn't work And from login screen selecting Ubuntu 2D and that also didn't solve the problem. My laptop is Toshiba SA-60 onboard ATI graphic card with 1 GB RAM. Please tell me how to solve this problem. I don't want to reinstall Ubuntu as whenever I install a I/O error pops up, forget about that. I don't want to reinstall Ubuntu. Please help.

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  • JS / HTML 5 Compatablity issue on iOS 6

    - by Dhaval
    I'm using HTML 5 to play video and there are some content before the video so I'm using flexroll to scroll that whole window. I'm checking it on iPad, now problem is that in iOS 5 its working fine but when I update to iOS 6 then screen is not scrolling only video is scroll up and down, content is as it is in the position. I can't understand what is the exact problem. Is that js compatibility issue or HTML 5 video compatibility issue. Can anyone please help me to figure out, your help will really be appreciated.

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  • Is there a way to publish IOS app from windows/Linux?

    - by user65760
    So I have been using Linux(especially, ubuntu) and windows(windows 7) for a long time . But i dont have a MAC, neither do i have an iphone. I do not actually want to buy them either . So the problem here is :how do i publish my app from windows or linux ? Kindly do understand i am not speaking about jailbroken programs(for jail broken i phones), i do not have any one near me who will lend me a MAC to publish my app . I started learning objective C some time ago. However, whenever i search the internet i get this information that there is no full proof way of publishing an app from windows or Linux . I also do intend to make it a paid app, meaning i dont wanna make it free. It will be very helpful if someone can suggest a way to overcome this problem .

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  • Can manager classes be a sign of bad architecture?

    - by Paul
    Lately I've begun to think that having lots of manager classes in your design is a bad thing. The idea hasn't matured enough for me to make a compelling argument, but here's a few general points: I found it's a lot harder for me to understand systems that rely heavily on "managers". This is because, in addition to the actual program components, you also have to understand how and why the manager is used. Managers, a lot of the time, seem to be used to alleviate a problem with the design, like when the programmer couldn't find a way to make the program Just WorkTM and had to rely on manager classes to make everything operate correctly. Of course, mangers can be good. An obvious example is an EventManager, one of my all time favorite constructs. :P My point is that managers seem to be overused a lot of the time, and for no good reason other than mask a problem with the program architecture. Are manager classes really a sign of bad architecture?

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  • Applying the Knuth-Plass algorithm (or something better?) to read two books with different length and amount of chapters in parallel

    - by user147133
    I have a Bible reading plan that covers the whole Bible in 180 days. For the most of the time, I read 5 chapters in the Old Testament and 1 or 2 (1.5) chapters in the New Testament each day. The problem is that some chapters are longer than others (for example Psalm 119 which is 7 times longer than a average chapter in the Bible), and the plan I'm following doesn't take that in count. I end up with some days having a lot more to read than others. I thought I could use programming to make myself a better plan. I have a datastructure with a list of all chapters in the bible and their length in number of lines. (I found that the number of lines is the best criteria, but it could have been number of verses or number of words as well) I then started to think about this problem as a line wrap problem. Think of a chapter like a word, a day like a line and the whole plan as a paragraph. The "length" of a word (a chapter) is the number of lines in that chapter. I could then generate the best possible reading plan by applying a simplified Knuth-Plass algorithm to find the best breakpoints. This works well if I want to read the Bible from beginning to end. But I want to read a little from the new testament each day in parallel with the old testament. Of course I can run the Knuth-Plass algorithm on the Old Testament first, then on the New Testament and get two separate plans. But those plans merged is not a optimal plan. Worst-case days (days with extra much reading) in the New Testament plan will randomly occur on the same days as the worst-case days in the Old Testament. Since the New Testament have about 180*1.5 chapters, the plan is generally to read one chapter the first day, two the second, one the third etc... And I would like the plan for the Old Testament to compensate for this alternating length. So I will need a new and better algorithm, or I will have to use the Knuth-Plass algorithm in a way that I've not figured out. I think this could be a interesting and challenging nut for people interested in algorithms, so therefore I wanted to see if any of you have a good solution in mind.

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  • Ubuntu 11.10 shut down stuck

    - by Jack Mayerz
    When I shut down it is always stuck on the shut down screen where it displays the ubuntu logo and the little dots. I tried to shut it down through shell, I checked the Init. process, shell and everything. I can't find out where the problem is!! I tried to shut down through terminal session and still the same problem. It's really annoying and I have to shut down with power button every single time. Anyone got a solution?

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  • Check if the vector is behind another or maybe opposite directions?

    - by Gilson
    I'm doing a network game and on the client side, i interpolate the client position with the server sent extrapolated position. The client has its own physics simulation wich is corrected by the server in steps. The problem is when it laggs and i 'kick' the ball, the server gets a delayed message and sends me the position backwards of the client position wich makes the ball goes back and forth. I want to ignore those and maybe compensate that on the server, not sure though. The problem is the clock difference on those case are 0.07ms or 0.10 ms wich isn't that high to ignore the message i guess. When i get the server position, i extrapolate with the clock interval * serverBallVelocity Can i check if my new ball server position is behind my actual ball vector position? I tried to use the dot product after normalized the two vectors to check if they are opposite but it ain't working properly. Any suggestions on checking that?

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  • Ways to prevent client seeing my code

    - by James Eggers
    I've got a bit of a strange problem.. Basically, I'm building a fairly complex (un-compiled, interpreted) program in Python. I've been working on most of this code for other purposes for a few months, and therefore don't want my client to be able to simple copy and paste it and then try and sell it (it's worth a fair amount). The other problem is that I need the script to run on a server that my client is paying for. Is there any way I can secure a particular folder on the machine from root access, make it so only one particular can access the directory? The OS is Ubuntu.

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  • Network connection on an Acer Aspire 5253?

    - by fuquam
    Brand new to Ubuntu and PCs for that matter. I've been a Mac user all my life but wanted to try Ubuntu on the cheap, so I bought an Acer Laptop 5253-BZ893 and i got Ubuntu 10.10 installed with no problem. The only problem i have is, that i get no network connection options, wired or wireless. I just get No Network Devices Available. The computer came with Windows 7 installed and i am able to connect to my wireless network fine using Windows, so i know the computer works. Also i've been searching forums and google for hours trying to figure out why I can't get a network connection in Ubuntu but so far no luck. Any suggestions? Thanks in advance.

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  • Ubuntu 12.04 freezing on startup

    - by Frank
    Have been looking everywhere to find a solution to this problem but have yet to find a solution. I am running 64 bit 12.04 LTS on a AMD C-50 Dual core 6 gigs ram AMD Ratheon HD 6250. The problem I am experiencing is when ubuntu gets to the wallpaper screen it will sometimes freeze soon after the the image appears or shortly there after gnome loads locking up keyboard and mouse. When I try to log in via the console the same thing happens (this is as ubuntu is loading). At the moment the system is set to auto login previously it was set to ask for password but it did the same thing. Switching to from lightdm to gdm did nothing to alleviate the issue. I have never had so many issues with ubuntu I have to say 12.04 is the most buggy version yet.

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  • XNA - positioning after rotation

    - by DijkeMark
    I have a turret with a 2 gunbarrels. The turret rotates towards my mouse. So far no problem. When it creates a few bullets and positions them at the end of the gun barrels. Here is the problem. It only works the moment the gun is point upwards. The moment it rotates the end of the gun barrels have moved ofcourse, thus the bullets don't spawn at the end of the gun battels, but at the place the where the gun barrels are when the turret is pointing upwards. How can I check where the end of the gun barrels are the moment it rotates? Thanks in Advance, Mark Dijkema PS. If you need code please let me know, I didn't post any yet, because I didn't what code you would need.

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  • Mic not working on Lenovo G470

    - by Caveman
    I used a Lenovo G470 laptop (Core i5 2410M processor, AMD Radeon 6370M and 2GB DDR3 RAM) and I installed Ubuntu 12.04. I can't get the microphone to work. I encountered this type of issue before in my old Acer Aspire One with Ubuntu 10.04/10.10, and installing PulseAudio Volume Control and tweaking a little solves the problem. I tried the same solution to no avail in 12.04. I tried entering the alsa in terminal and my mic is not detected there. Does anybody encountered a similar problem? Any help will be greatly appreciated.

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  • Collision rectangle response

    - by dotty
    I'm having difficulties getting a moveable rectangle to collide with more than one rectangle. I'm using SFML and it has a handy function called Intersect() which takes 2 rectangles and returns the intersections. I have a vector full of rectangles which I want my moveable rectangle to collide with. I'm looping through this using the following code (p is the moveble rectangle). IsCollidingWith returns a bool but also uses SFML's Interesect to work out the intersections. while(unsigned i = 0; i!= testRects.size(); i++){ if(p.IsCollidingWith(testRects[i]){ p.Collide(testRects[i]); } } and the actual Collide() code void gameObj::collide( gameObj collidingObject ){ printf("%f %f\n", this->colliderResult.width, this->colliderResult.height); if (this->colliderResult.width < this->colliderResult.height) { // collided on X if (this->getCollider().left < collidingObject.getCollider().left ) { this->move( -this->colliderResult.width , 0); }else { this->move( this->colliderResult.width, 0 ); } } if(this->colliderResult.width > this->colliderResult.height){ if (this->getCollider().top < collidingObject.getCollider().top ) { this->move( 0, -this->colliderResult.height); }else { this->move( 0, this->colliderResult.height ); } } } and the IsCollidingWith() code is bool gameObj::isCollidingWith( gameObj testObject ){ if (this->getCollider().intersects( testObject.getCollider(), this->colliderResult )) { return true; }else { return false; } } This works fine when there's only 1 Rect in the scene. However, when there's move than one Rect it causes issue when working out 2 collisions at once. Any idea how to deal with this correctly? I have uploaded a video to youtube to show my problem. The console on the far-right shows the width and height of the intersections. You can see on the console that it's trying to calculate 2 collisions at once, I think this is where the problem is being caused. The youtube video is at http://www.youtube.com/watch?v=fA2gflOMcAk also , this image also seems to illustrate the problem nicely. Can someone please help, I've been stuck on this all weekend!

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  • How do I change local display resolution via SSH?

    - by krumble1
    I have a machine running Ubuntu Server 12.04 LTS and I'm having problems with the local monitor. The Dell flat panel I'm using only displays this message while the computer running: "Cannot Display This Video Mode" and then the information: "Optimum resolution 1280x1024 60Hz". I'm fairly new to using an operating system wholly via command line but I'm learning fast. :) I can access the server fine via SSH so using it is not a problem. However, for where it is positioned at the moment, it would be much more convenient to use the computer locally. I'm just wondering how to change the local screen resolution via SSH to something usable by my monitor. Thanks for your time! BTW: I have also tried switching displays and I still have the same problem. Also BTW: I tried putting in the xrandr command and all I get back is: Can't open display

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  • Why is Firefox changing the color calibration of this image?

    - by eoinoc
    The symptom of my problem is that the same hex color in a PNG image does not match the CSS-defined color defined by the same hex code. This problem only happens in Firefox when gfx.color_management.mode is set to 2 (tagged images only) rather than 0 (off). (Firefox ICC color correction described here). The image is http://dzfk93w6juz0e.cloudfront.net/images/background-top-light.png which at the bottom has the color #c8e8bd. However, the shade of green is different to that color when Firefox color calibration is enabled. Is this image inadvertently "tagged" for color correction?

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