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  • Rotate/Translate object in local space

    - by Mathias Hölzl
    I am just trying to create a movementcontroller class for game entities. These class should transform the entity affected by the mouse and keyboard input. I am able to calculate the changed rotation and the new globalPosition. Then I multiply: newGlobalMatrix = changedRotationMatrix * oldGlobalMatrix; newGlobalMatrix = MatrixSetPosition(newPosition); The problem is that the object rotates around the global axis and not around the local axis. I use XNAMath for the matrix calculation.

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  • Bullet Physic: Transform body after adding

    - by Mathias Hölzl
    I would like to transform a rigidbody after adding it to the btDiscreteDynamicsWorld. When I use the CF_KINEMATIC_OBJECT flag I am able to transform it but it's static (no collision response/gravity). When I don't use the CF_KINEMATIC_OBJECT flag the transform doesn't gets applied. So how to I transform non-static objects in bullet? DemoCode: btBoxShape* colShape = new btBoxShape(btVector3(SCALING*1,SCALING*1,SCALING*1)); /// Create Dynamic Objects btTransform startTransform; startTransform.setIdentity(); btScalar mass(1.f); //rigidbody is dynamic if and only if mass is non zero, otherwise static bool isDynamic = (mass != 0.f); btVector3 localInertia(0,0,0); if (isDynamic) colShape->calculateLocalInertia(mass,localInertia); btDefaultMotionState* myMotionState = new btDefaultMotionState(); btRigidBody::btRigidBodyConstructionInfo rbInfo(mass,myMotionState,colShape,localInertia); btRigidBody* body = new btRigidBody(rbInfo); body->setCollisionFlags(body->getCollisionFlags()|btCollisionObject::CF_KINEMATIC_OBJECT); body->setActivationState(DISABLE_DEACTIVATION); m_dynamicsWorld->addRigidBody(body); startTransform.setOrigin(SCALING*btVector3( btScalar(0), btScalar(20), btScalar(0) )); body->getMotionState()->setWorldTransform(startTransform);

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  • Execute code at specific intervals, only once?

    - by Mathias Lykkegaard Lorenzen
    I am having an issue with XNA, where I want to execute some code in my Update method, but only at a given interval, and only once. I would like to avoid booleans to check if I've already called it once, if possible. My code is here: if ((gameTime.TotalGameTime.TotalMilliseconds % 500) == 0) { Caret.Visible = !Caret.Visible; } As you may have guessed, it's for a TextBox control, to animate the caret between invisible and visible states. I just have reason to believe that it is called twice or maybe even 3 times in a single update-call, which is bad, and makes it look unstable and jumpy.

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  • Doubling the DPI with a shader?

    - by Mathias Lykkegaard Lorenzen
    I'm developing a game where the map is generated with Perlin Noise, but on the CPU. I am generating some perlin noise onto a texture with a small size, and then I stretch it out to the whole screen to simulate a map. The reason for the CPU generating the noise is that I want it to look the same on all devices. Now, here's the end-result. Please ignore the bullets and the explosion on the picture. What matters is the background (the black/gray pixels) and the ground (the brown-ish pixels). They are rendered to the same texture through perlin noise. However, this doesn't look very pretty. So I was wondering if it would be possible to double the amount of pixels using a shader, and rounding edges at the same time? In other words, improve the DPI. I'm using SharpDX with DirectX 11, through its toolkit feature. But any help that'll lead me in the right direction (for instance through HLSL) would be a great help. Thanks in advance.

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  • How to detect non-graceful disconnect of Twisted on Linux?

    - by Victor Lin
    I wrote a server based on Twisted, and I encountered a problem, some of the clients are disconnected not gracefully. For example, the user pulls out the network cable. For a while, the client on Windows is disconnected (the connectionLost is called, and it is also written in Twisted). And on the Linux server side, my connectionLost of twisted is never triggered. Even it try to writes data to client, but the connection is lost. Why Twisted can't detect those non-graceful disconnection (even write data to client) on Linux? How to makes Twisted detect non-graceful disconnections? Because the feature Twisted can't detect non-graceful, I have lots of zombie user on my server. Thanks. Victor Lin.

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  • What is the best Programming Language for Kiosk Application? [closed]

    - by Jen Lin
    I need your suggestions guys regarding the project I'm planning to create. I want to create a kiosk software/application that is capable to access database in a server. (So, there's a networking here..)Because the information that will be displayed in a Kiosk screen will be coming from a database in other computer. So my problem here is, I don't know which programming language is the best for this kind of application. I'm thinking about using Visual Basic 6.0 since my group is comfortable using this programming language, but I also want to consider the design. I don't like a plain button. Hope to hear from you guys, thanks much :)

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  • Should I include HTML markup in my JSON response?

    - by Mike M. Lin
    In an e-commerce site, when adding an item to a cart, I'd like to show a popup window with the options you can choose. Imagine you're ordering an iPod Shuffle and now you have to choose the color and text to engrave. I'd like the window to be modal, so I'm using a lightbox populated by an Ajax call. Now I have two options: Option 1: Send only the data, and generate the HTML markup using JavaScript What's nice about this is that it trims down the Ajax request to the bear minimum and doesn't mix the data with the markup. What's not so great about this is that now I need to use JavaScript to do my rendering, instead of having a template engine on the server-side do it. I might be able to clean up the approach a bit by using a client-side templating solution. Option 2: Send the HTML markup What's good about this is that I can have the same server-side templating engine I'm using for the rest of my rendering tasks (Django), do the rendering of the lightbox. JavaScript is only used to insert the HTML fragment into the page. So it clearly leaves the rendering to the rendering engine. Makes sense to me. But I don't feel comfortable mixing data and markup in an Ajax call for some reason. I'm not sure what makes me feel uneasy about it. I mean, it's the same way every web page is served up -- data plus markup -- right?

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  • Test driven vs Business requirements constant changing

    - by James Lin
    One of the new requirement of our dev team set by the CTO/CIO is to become test driven development, however I don't think the rest of the business is going to help because they have no sense of development life cycles, and requirements get changed all the time within a single sprint. Which gets me frustrated about wasting time writing 10 test cases and will become useless tomorrow. We have suggested setting up processes to dodge those requirement changes and educate the business about development life cycles. What if the business fails to get the idea? What would you do?

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  • How to learn programming for a medium scale project form a beginner? [closed]

    - by Lin Xiangyu
    I study programming by myself.I have learn servel programming languages. but I never write a project more than 1000 lines. I know the best way to improve programming skills is practise. The problem is many books, just talk about the programming language, or talk about build a project from a high level. Fews of books will teach how to build a middle scale project. For example, I want to build a simple HTTP Server(Nor like Apache or just a simple listenr to a port), a Markdown Parser, or a download tools just like emule or wget. I don't know what to do. I may found peaces of code in the web, or found familiar project in the Github. I don't know how to read the code. I want to some tutorial that can told me how to build the project step by step, teacher me how to write thousands lines of code. Any suggest?

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  • An alternative to reading input from Java's System.in

    - by dvanaria
    I’m working on the UVa Online Judge problem set archive as a way to practice Java, and as a way to practice data structures and algorithms in general. They give an example input file to submit to the online judge to use as a starting point (it’s the solution to problem 100). Input from the standard input stream (java.lang.System.in) is required as part of any solution on this site, but I can’t understand the implementation of reading from System.in they give in their example solution. It’s true that the input file could consist of any variation of integers, strings, etc, but every solution program requires reading basic lines of text input from System.in, one line at a time. There has to be a better (simpler and more robust) method of gathering data from the standard input stream in Java than this: public static String readLn(int maxLg) { byte lin[] = new byte[maxLg]; int lg = 0, car = -1; String line = “”; try { while (lg < maxLg) { car = System.in.read(); if ((car < 0) || (car == ‘\n’)) { break; } lin[lg++] += car; } } catch (java.io.IOException e) { return (null); } if ((car < 0) && (lg == 0)) { return (null); // eof } return (new String(lin, 0, lg)); } I’m really surprised by this. It looks like something pulled directly from K&R’s “C Programming Language” (a great book regardless), minus the access level modifer and exception handling, etc. Even though I understand the implementation, it just seems like it was written by a C programmer and bypasses most of Java’s object oriented nature. Isn’t there a better way to do this, using the StringTokenizer class or maybe using the split method of String or the java.util.regex package instead?

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  • Checking for Repeated Strings in 2d list

    - by Zach Santiago
    i have a program where i have a list of names and classes. i have the list in alphabetical order. now im trying to check if names repeat, add the classes to one single name. im trying to write some code like go through names if name is already in list, add the class to the one name. so an example would be, instead of having 'Anita ','phys 1443', and 'Anita','IE 3312' i would just have 'Anita','PHYS 1443','IE 3312'. How would i go about doing this in a logival way, WITHOUT using any sort of built in functions? i tried comparing indexe's like if list[i][0] == list[i+1][0], append list[i+1][1] to an emptylist. while that almost worked, it would screw up at some points along the way. here is my attempt size = len(c) i = 0 c = [['Anita', 'PHYS 1443'], ['Anita', 'IE 3312'], ['Beihuang', 'PHYS 1443'], ['Chiao-Lin', 'MATH 1426'], ['Chiao-Lin', 'IE 3312'], ['Christopher', 'CSE 1310'], ['Dylan', 'CSE 1320'], ['Edmund', 'PHYS 1443'], ['Ian', 'IE 3301'], ['Ian', 'CSE 1320'], ['Ian', 'PHYS 1443'], ['Isis', 'PHYS 1443'], ['Jonathan', 'MATH 2325'], ['Krishna', 'MATH 2325'], ['Michael', 'IE 3301'], ['Nang', 'MATH 2325'], ['Ram', 'CSE 1320'], ['Taesu', 'CSE 1320'], ["Tre'Shaun", 'IE 3312'], ["Tre'Shaun", 'MATH 2325'], ["Tre'Shaun", 'CSE 1310']] ## Check if any names repeat d.append(c[0][0]) while i < size - 1 : if c[i][0] == c[i+1][0] : d.append(c[i][1]) d.append(c[i+1][1]) else : d.append(c[i+1][0]) d.append(c[i+1][1]) i = i + 1 print d output was. ['Anita', 'PHYS 1443', 'IE 3312', 'Beihuang', 'PHYS 1443', 'Chiao-Lin', 'MATH 1426', 'MATH 1426', 'IE 3312', 'Christopher', 'CSE 1310', 'Dylan', 'CSE 1320', 'Edmund', 'PHYS 1443', 'Ian', 'IE 3301', 'IE 3301', 'CSE 1320', 'CSE 1320', 'PHYS 1443', 'Isis', 'PHYS 1443', 'Jonathan', 'MATH 2325', 'Krishna', 'MATH 2325', 'Michael', 'IE 3301', 'Nang', 'MATH 2325', 'Ram', 'CSE 1320', 'Taesu', 'CSE 1320', "Tre'Shaun", 'IE 3312', 'IE 3312', 'MATH 2325', 'MATH 2325', 'CSE 1310']

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  • Typing numbers on a MacBook Pro with AZERTY keyboard with Caps Lock — possible?

    - by Mathias Bynens
    I have a Belgian AZERTY keyboard on my MacBook Pro. Sadly, it appears to be impossible to use Caps Lock to type numbers — I still need to hold Shift for every number I want to type. Is it possible to change the Caps Lock key’s function to Shift Lock so that it affects the whole keyboard rather than just the letters? I’d like to be able to type numbers without holding Shift.

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  • How to delete the history and cache in Opera Mobile (10.1)

    - by Mathias Lin
    I run Opera Mobile 10.1 on Android. My device is rooted. How can I clear the history and cache of the browser via shell? As su, removing /data/data/com.opera.browser/opera/profiles/smartphone/cookies4.dat /data/data/com.opera.browser/opera/profiles/smartphone/cache /data/data/com.opera.browser/opera/profiles/smartphone/cacheO and a /system/xbin/busybox killall -9 com.opera.browser afterwards doesn't seem to do the job. Afterwards, bookmarks etc. are still there. In Opera Mini I found it easy to just delete /data/data/com.opera.mini.android/cache/webviewCache /data/data/com.opera.mini.android/databases but unfortunately, Opera Mini in it's current version has a bug and doesn't work on most devices.

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  • Macbook Pro suddenly lagging video playback + Flash sites

    - by Mathias
    I have a Macbook Pro, OSx Lion, Intel Core2 Duo, 4GB Ram, NVidia Geforce 8600M GT 128 MB Ram, Intel x25m SSD. Approximately 4 years old. I've been running Flash sites and playing videos without any problems for years. Then suddenly 3 months ago, a flash site like http://thefwa.com is lagging in all browsers. Even mouseover animations - anything. Also video playback in e.g VLC and Quicktime is now lagging. Same videos I used before, I tried installing an older version of VLC without any luck. Playing back video in VLC utilizes the CPU almost 100%, and Flash sites like thefwa.com easily takes up 50-60%. It's as if the hardware acceleration stopped working, or the GPU lost its magic. UPDATE: Same issues also occurred on Snow Leopard Has anyone experienced something similar, or do you know what might be wrong?

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  • Removing Little Snitch completely (Mac OS X Snow Leopard)

    - by Mathias Bynens
    I uninstalled Little Snitch months ago. Or so, I thought. When opening Console.app, I see something like this: Here’s a textual log: 21/11/09 22:05:31 com.apple.launchd[1] (at.obdev.littlesnitchd[10045]) Exited with exit code: 1 21/11/09 22:05:31 com.apple.launchd[1] (at.obdev.littlesnitchd) Throttling respawn: Will start in 10 seconds 21/11/09 22:05:33 Little Snitch UIAgent[10046] 2.0.4.385: m65968c1c 21/11/09 22:05:33 Little Snitch UIAgent[10046] 2.0.4.385: m579328b9 21/11/09 22:05:33 Little Snitch UIAgent[10046] 2.0.4.385: m41531ded 21/11/09 22:05:33 com.apple.launchd.peruser.501[170] (at.obdev.LittleSnitchUIAgent) Throttling respawn: Will start in 10 seconds 21/11/09 22:05:41 com.apple.launchd[1] (at.obdev.littlesnitchd[10049]) Exited with exit code: 1 21/11/09 22:05:41 com.apple.launchd[1] (at.obdev.littlesnitchd) Throttling respawn: Will start in 10 seconds 21/11/09 22:05:43 Little Snitch UIAgent[10050] 2.0.4.385: m65968c1c 21/11/09 22:05:43 Little Snitch UIAgent[10050] 2.0.4.385: m579328b9 21/11/09 22:05:43 Little Snitch UIAgent[10050] 2.0.4.385: m41531ded 21/11/09 22:05:43 com.apple.launchd.peruser.501[170] (at.obdev.LittleSnitchUIAgent) Throttling respawn: Will start in 10 seconds Spotlight searches for ‘little snitch’ or ‘littlesnitch’ yield no results. Yet, it seems like I didn’t get rid of Little Snitch entirely, since it’s still using up my CPU. Any ideas?

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  • How many pHPShield loaders do I need to install

    - by Amit
    An application asks me to install an old pHPshield version but prior to that it asks that I delete all pHPshield loaders in the php extension_dir directory. Am planning to encode some of my own php files with the newer pHPSHIELD version (8+) so I need to also upload newer loaders, but am not sure if it's ok to have multiple pHPSHIELD loaders in the extension dir. Can someone please clarify this confusion? My server runs php 5.2.14 with phpSHIELD Loader Version 5.0.1 and an i386 structure on Centos. The pHPSHILED demo created me a bunch of folders containing the loaders(files that end with .lin extension. I assume the folder Linux_x86-32 is the correct one for my server structure and it contains files like ixed.5.0.1.lin . Can I upload these next to the existing one in the extension_dir directory? Thank you

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  • Cursor lag when mouse cursor changes?

    - by Mathias Lykkegaard Lorenzen
    Cursor lag issue Introduction I'm experiencing a newly arrived problem lately that frustrates me a lot. The computer I bought is a Clevo 150ERM. Two of my friends bought the same machine, and are experiencing the same issue. The computer came with Windows 7. There, I had no issues. Then, when we all switched to Windows 8, they had the mouse problem and I didn't. That is until after 4 or 5 months when I decided to install the RTM driver of my Intel graphics chip, and the latest Nvidia driver. I also installed the latest version of Skype that just released (Skype 6 and Skype for Metro). This basically leads me to conclude that the issue is not hardware-prone, and is not based on the operating system itself, rather the drivers or components that follow with it. Description of the issue The issue itself (lag with the mouse) happens whenever the cursor icon changes. For instance, if I keep hovering from and to a textfield (and the cursor changes into a caret and then back to a mouse), it stops for 200 milliseconds while it changes the icon. An example is if I follow the mouse in the pattern shown by the arrows below. When crossing the window border, the cursor changes into a "resize window" cursor for a short while, making the cursor lag. This doesn't sound like much, but it happens every time the cursor changes (even if it's to just move the mouse somewhere else, and accidentally make it cross a window border from where the resize cursor shows etc). What do you suggest I try?

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  • How to install a private user script in Chrome 21+?

    - by Mathias Bynens
    In Chrome 20 and older versions, you could simply open any .user.js file in Chrome and it would prompt you to install the user script. However, in Chrome 21 and up, it downloads the file instead, and displays a warning at the top saying “Extensions, apps, and user scripts can only be added from the Chrome Web Store”. The “Learn More” link points to http://support.google.com/chrome_webstore/bin/answer.py?hl=en&answer=2664769, but that page doesn’t say anything about user scripts, only about extensions in .crx format, apps, and themes. This part sounded interesting: Enterprise Administrators: You can specify URLs that are allowed to install extensions, apps, and themes directly through the ExtensionInstallSources policy. So, I ran the following commands, then restarted Chrome and Chrome Canary: defaults write com.google.Chrome ExtensionInstallSources -array "https://gist.github.com/*" defaults write com.google.Chrome.canary ExtensionInstallSources -array "https://gist.github.com/*" Sadly, these settings only seem to affect extensions, apps, and themes (as it says in the text), not user scripts. (I’ve filed a bug asking to make this setting affect user scripts as well.) Any ideas on how to install a private user script (that I don’t want to add to the Chrome Web Store) in Chrome 21+? Update: The problem was that gist.github.com’s raw URLs redirect to a different domain. So, use these commands instead: # Allow installing user scripts via GitHub or Userscripts.org defaults write com.google.Chrome ExtensionInstallSources -array "https://*.github.com/*" "http://userscripts.org/*" defaults write com.google.Chrome.canary ExtensionInstallSources -array "https://*.github.com/*" "http://userscripts.org/*" This works!

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  • Config postGreSQL pg_hba.conf restric role access

    - by Mathias
    Hello postgre experts. I am completely new to the game but need the following: I Create a new role with login. Let's say: User1 I then create a Database 'User1Database' and set User1 as the owner. User1 has no rights to do anything except for access. Now when I connect using User1 it somehow has access to all databases. I then learned I neeed to write something in here. User1 should have global access to User1Database and absolutely no access to anything else. What lines do I need to add to my pg_hba file? Currently it looks like this: # IPv4 local connections: host all all 127.0.0.1/32 md5 # IPv6 local connections: host all all ::1/128 md5 host all all 0.0.0.0/0 md5 Hope someone can write me the exact lines and explain them to me.

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  • Tomcat OutOfMemory after switching JVM

    - by Mathias
    I have a Tomcat6 server running on Debian squeeze there are 4 webapps running on it, and an in-JVM ActiveMQ server. It has been running for about a year with the same memorysettings, with openjdk-6. Everything has worked dandy, no issues at all. Now, for various reasons, i need to try out Sun's JDK. So, I installed sun's jvm with standard apt-get apt-get install sun-java6-bin , and switched using update-java-alternatives -s java-6-sun However, when i start tomcat, i get outofmemory, the server won't even start! If i switch back to openJDK, all works fine again. I haven't had any memory issues on this server before, so it feels strange that the server suddenly won't start with sun's JDK. Anybody have any clue as to why this might happen? Have i missed something? I naturally have set heap sizes etc. in tomcat. Currently running with: -Xms256m -Xmx1024m Which as mentioned works in openSDK, outofmemory in sun-jdk... EDIT: server is 64-bit, openJDK and Sun are 1.6.0, both 64-bit JVMs.

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  • How to use dedicated video card instead of onboard?

    - by Mathias Lykkegaard Lorenzen
    I tried running DxDiag (DirectX diagnostics), and I noticed that my graphics card is set to the onboard one that comes with the Core i5 processor (some Intel HD stuff). On my computer, I also have a dedicated graphics card (an Nvidia 310). No serious gaming stuff, I know - just for programming. However, I would still love to know how to switch to that dedicated graphics card instead. My laptop is an MSI CX720.

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  • Force delivery retry without restarting the SMTP Service on Windows Server 2008 R2

    - by Mathias R. Jessen
    I have a Windows Server 2008 R2 box hosting 3 virtual SMTP servers; vSMTP01, vSMTP02 and vSMTP03. The first two are configured to deliver all messages to dedicated smarthosts, while the last is set to just deliver the messages on its own. All other delivery settings are as default ----(vSMTP01)-----> {SMARTHST01} / ----Inbound mail--->---SMTPSRV01---[----(vSMTP02)-----> {SMARTHST02} \ ----(vSMTP03)-----> { Internet } Now I want to take SMARTHST01 out for maintenance, but I don't want to reject submissions to vSMTP01 while doing so, so I just let it continue running. When SMARTHST01 is no longer responding, vSMTP01 queues the messages and wait for the first retry interval to pass (15 minutes). So far so good. Let's say SMARTHST01 gets online again after 20 minutes. The first interval has passed, and I'll have to wait another 25 minutes for the second retry interval to pass. If I stop and start the SMTP Service (Services.msc - Simple Mail Transfer Protocol service - Stop), the server will retry all deliveries, but that would cause a service interruption for ALL virtual SMTP servers on the machine, which is highly undesirable. How can I manually force vSMTP01 to retry delivery of all queued messages without interrupting the service of vSMTP02 and vSMTP03?

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  • Backlight dimming don't work

    - by Mathias
    My Packard Bell EasyNote TS11HR notebook does not have an option for dimming the display backlight. At night, my eyes begin to hurt because of the strong light from the screen. My laptop is 2-3 months old and I am sure it has worked before. When I click on the battery icon in the notification area, it says in my language (Danish): "the setting for light does possibly reduce the life of the battery". However, I cannot dim the backlight. I have tried downloading programs for dimming the screen but they only make the screen darker, instead of dimming the backlight. I have tried updating my drivers and looking in the BIOS for a setting. I also plan to use an Ubuntu LiveCD to try controlling it. As of now though, the backlight is locked at maximum. Any ideas?

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  • How to use dedicated video card instead of onboard?

    - by Mathias Lykkegaard Lorenzen
    Hi there! I tried running DxDiag (DirectX diagnostics), and I noticed that my graphics card is set to the onboard one that comes with the Core i5 processor (some Intel HD stuff). On my computer, I also have a dedicated graphics card (an Nvidia 310). No serious gaming stuff, I know - just for programming. However, I would still love to know how to switch to that dedicated graphics card instead. My laptop is an MSI CX720.

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  • Can't access server from external IP

    - by Mathias
    I have a problem with my web server; I can't access it from the external IP address. I'm using an IIS 7 server, but I've tried with apache on Linux as well. I have forwarded all traffic on port 80 to my computer, but it just won't work. I've done port forwarding with my Minecraft server, and it did work, but when I try it with a web server, no. I've been looking on many many forums, but their methods don't work for me. My router is a Speedport W 723V, if anyone knows that one. Any help is appreciated.

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