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  • Ask the Readers: How Do You Remote Desktop Access Distant Computers?

    - by Jason Fitzpatrick
    You’re at a computer at point A, but the computer you want to interact with is at point B, and the only thing connecting you is a series of network switches and cabling. How do you comfortably control the remote computer? While there are a variety of ways to control a computer from afar, sometimes there’s just no good substitute for accessing the user interface as if you were sitting at the computer–a feat made possibly by remote desktop software. This week we want to hear about both your favorite remote desktop tool and your best tips for getting the most out of a remote desktop session–from banishing lag to improving mouse-cursor tracking, any tips are fair game. Sound off in the comments below with your remote desktop tips and then check back in on Friday for the What You Said roundup. Java is Insecure and Awful, It’s Time to Disable It, and Here’s How What Are the Windows A: and B: Drives Used For? HTG Explains: What is DNS?

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  • NightHacking demo: Java in the Internet of Things

    - by terrencebarr
    The NightHacking session with Steven Chin was good fun. Check out the video on “Java in the Internet of Things” and a live demo of the Smart Solar Tracking System with Java ME Embedded 3.2. Real hardware and demo flakiness included See here. While you are at, have a look at some of the other NightHacking sessions and a number of other videos on the YouTube Java Channel. Cheers, – Terrence Filed under: Mobile & Embedded Tagged: "Oracle Java ME Embedded", demo, embedded, iot, Java Embedded, nighthacking, video, webcast

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  • NightHacking demo: Java in the Internet of Things

    - by terrencebarr
    The NightHacking session with Steven Chin was good fun. Check out the video on “Java in the Internet of Things” and a live demo of the Smart Solar Tracking System with Java ME Embedded 3.2. Real hardware and demo flakiness included See here. While you are at, have a look at some of the other NightHacking sessions and a number of other videos on the YouTube Java Channel. Cheers, – Terrence Filed under: Mobile & Embedded Tagged: "Oracle Java ME Embedded", demo, embedded, iot, Java Embedded, nighthacking, video, webcast

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  • BlueNES: A Bluetooth Connector for Classic NES Controllers

    - by Jason Fitzpatrick
    If you’re looking for a DIY way to hook up your classic Nintendo controllers for use in modern emulation programs, this hack allows you to use them without modifying the original casing or cables. Courtesy of Evan Dustin, we find this guide on hacking apart a broken NES unit (to get the basic parts like the port connectors) and then binding it all together with an Arduino board. Check out the video above to see it in action and then hit up the link below to check out the notes on the YouTube video for additional information including parts and code. BluesNES: Bluetooth NES Controller [via Hack A Day] HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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  • How to Disable Home Folder Encryption After Installing Ubuntu

    - by Chris Hoffman
    Ubuntu offers to encrypt your home directory during installation. The encryption has some drawbacks – there’s a performance penalty and recovering your files is more difficult. If you change your mind later, you can remove the encryption without reinstalling Ubuntu. The process of removing the encryption involves creating a backup copy of your home directory without encryption, deleting the existing home directory, removing the encryption utilities, and moving the unencrypted copy back into place. HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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  • How will Quantum computing affect us?

    - by CiscoIPPhone
    I am interested in quantum computing, but have not studied it in depth. Things like Shor's algorithm intrigue me. My question is: If quantum computing took off in a big way (i.e. functional quantum home computers were available) how would it affect us programmers and software developers? Would we have to learn how to make use of superposition and entanglement - would it change how we write algorithms? Would more mathematical programmers be required/would we need new skills? Would it change nothing at all from our perspective (i.e. would it be abstracted)? Your opinion is welcome.

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  • How to Recover an Encrypted Home Directory on Ubuntu

    - by Chris Hoffman
    Access an encrypted home directory when you’re not logged in – say, from a live CD – and all you’ll see is a README file. You’ll need a terminal command to recover your encrypted files. You should also back up your mount passphrase ahead of time – you may need this in the future. While eCryptfs normally decrypts your files with your login passphrase, the mount passphrase may be necessary if eCryptfs’s files become lost. HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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  • 6 Ways to Speed Up Your Ubuntu PC

    - by Chris Hoffman
    Ubuntu is pretty snappy out-of-the-box, but there are some ways to take better advantage of your system’s memory and speed up the boot process. Some of these tips can really speed things up, especially on older hardware. In particular, selecting a lightweight desktop environment and lighter applications can give an older system a new lease on life. That old computer that struggles with Ubuntu’s Unity desktop can provide decent performance for years to come. HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online Here’s How to Download Windows 8 Release Preview Right Now

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  • Better Agile Retrospectives

    - by thycotic
    David has posted about the Agile Retrospectives book and his experiences.  Incremental change is fundamental to so many agile practices (probably the most important in my opinion) – and retrospectives are the best way to foster discussion and prompt change.  The problem is how to get everyone involved in the process.   Jonathan Cogley is the CEO of Thycotic Software, an agile software services and product development company based in Washington DC.  Secret Server is our flagship enterprise password vault.

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  • Apple Aluminum Keyboard Via Bluetooth - Fn Key Problem

    - by Richard
    I'm connecting an Apple Bluetooth Aluminum keyboard (this one) to my Lubuntu setup using the blueman applet. The keyboard types fine, but I would like to use its fn key to change screen brightness changing, page-up (fn+ctrl+down), page-down (fn+ctrl+up), et cetera. Right now the fn key doesn't seem to work. When I use xev, I don't see anything happen when I press fn. Does the keyboard not send this to the computer at all? Do I need to configure blueman's "Input Service" setting to make this an Apple (rather than a generic) keyboard? (It's not obvious how to do this.) Is xev just not showing the fn key? Where in this stack of software do I need to make a change to achieve the desired behaviour? Thanks!

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  • Why does a bash-zenity script has that title on Unity Panel and that icon on Unity Launcher?

    - by Sadi
    I have this small bash script which helps use Infinality font rendering options via a more user-friendly Zenity window. But whenever I launch it I have this "Color Picker" title on Unity Panel together with the icon assigned for "Color Picker" utility. I wonder why and how this is happening and how I can change it? #!/bin/bash # A simple script to provide a basic, zenity-based GUI to change Infinality Style. # v.1.2 # infinality_current=`cat /etc/profile.d/infinality-settings.sh | grep "USE_STYLE=" | awk -F'"' '{print $2}'` sudo_password="$( gksudo --print-pass --message 'Provide permission to make system changes: Enter your password to start or press Cancel to quit.' -- : 2>/dev/null )" # Check for null entry or cancellation. if [[ ${?} != 0 || -z ${sudo_password} ]] then # Add a zenity message here if you want. exit 4 fi # Check that the password is valid. if ! sudo -kSp '' [ 1 ] <<<"${sudo_password}" 2>/dev/null then # Add a zenity message here if you want. exit 4 fi # menu(){ im="zenity --width=500 --height=490 --list --radiolist --title=\"Change Infinality Style\" --text=\"Current <i>Infinality Style</i> is\: <b>$infinality_current</b>\n? To <i>change</i> it, select any other option below and press <b>OK</b>\n? To <i>quit without changing</i>, press <b>Cancel</b>\" " im=$im" --column=\" \" --column \"Options\" --column \"Description\" " im=$im"FALSE \"DEFAULT\" \"Use default settings - a compromise that should please most people\" " im=$im"FALSE \"OSX\" \"Simulate OSX rendering\" " im=$im"FALSE \"IPAD\" \"Simulate iPad rendering\" " im=$im"FALSE \"UBUNTU\" \"Simulate Ubuntu rendering\" " im=$im"FALSE \"LINUX\" \"Generic Linux style - no snapping or certain other tweaks\" " im=$im"FALSE \"WINDOWS\" \"Simulate Windows rendering\" " im=$im"FALSE \"WIN7\" \"Simulate Windows 7 rendering with normal glyphs\" " im=$im"FALSE \"WINLIGHT\" \"Simulate Windows 7 rendering with lighter glyphs\" " im=$im"FALSE \"VANILLA\" \"Just subpixel hinting\" " im=$im"FALSE \"CLASSIC\" \"Infinality rendering circa 2010 - No snapping.\" " im=$im"FALSE \"NUDGE\" \"Infinality - Classic with lightly stem snapping and tweaks\" " im=$im"FALSE \"PUSH\" \"Infinality - Classic with medium stem snapping and tweaks\" " im=$im"FALSE \"SHOVE\" \"Infinality - Full stem snapping and tweaks without sharpening\" " im=$im"FALSE \"SHARPENED\" \"Infinality - Full stem snapping, tweaks, and Windows-style sharpening\" " im=$im"FALSE \"INFINALITY\" \"Infinality - Standard\" " im=$im"FALSE \"DISABLED\" \"Act without extra infinality enhancements - just subpixel hinting\" " } # option(){ choice=`echo $im | sh -` # if echo $choice | grep "DEFAULT" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"DEFAULT\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "OSX" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"OSX\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "IPAD" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"IPAD\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "UBUNTU" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"UBUNTU\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "LINUX" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"LINUX\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "WINDOWS" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"WINDOWS\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "WIN7" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"WINDOWS7\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "WINLIGHT" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"WINDOWS7LIGHT\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "VANILLA" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"VANILLA\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "CLASSIC" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"CLASSIC\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "NUDGE" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"NUDGE\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "PUSH" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"PUSH\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "SHOVE" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"SHOVE\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "SHARPENED" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"SHARPENED\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "INFINALITY" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"INFINALITY\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "DISABLED" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"DISABLED\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # } # menu option # if test ${#choice} -gt 0; then echo "Operation completed" fi # exit 0

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  • Create Advanced Panoramas with Microsoft Image Composite Editor

    - by Matthew Guay
    Do you enjoy making panoramas with your pictures, but want more features than tools like Live Photo Gallery offer?  Here’s how you can create amazing panoramas for free with the Microsoft Image Composite Editor. Yesterday we took a look at creating panoramic photos in Windows Live Photo Gallery. Today we take a look at a free tool from Microsoft that will give you more advanced features to create your own masterpiece. Getting Started Download Microsoft Image Composite Editor from Microsoft Research (link below), and install as normal.  Note that there are separate version for 32 & 64-bit editions of Windows, so make sure to download the correct one for your computer. Once it’s installed, you can proceed to create awesome panoramas and extremely large image combinations with it.  Microsoft Image Composite Editor integrates with Live Photo Gallery, so you can create more advanced panoramic pictures directly.  Select the pictures you want to combine, click Extras in the menu bar, and select Create Image Composite. You can also create a photo stitch directly from Explorer.  Select the pictures you want to combine, right-click, and select Stitch Images… Or, simply launch the Image Composite Editor itself and drag your pictures into its editor.  Either way you start a image composition, the program will automatically analyze and combine your images.  This application is optimized for multiple cores, and we found it much faster than other panorama tools such as Live Photo Gallery. Within seconds, you’ll see your panorama in the top preview pane. From the bottom of the window, you can choose a different camera motion which will change how the program stitches the pictures together.  You can also quickly crop the picture to the size you want, or use Automatic Crop to have the program select the maximum area with a continuous picture.   Here’s how our panorama looked when we switched the Camera Motion to Planar Motion 2. But, the real tweaking comes in when you adjust the panorama’s projection and orientation.  Click the box button at the top to change these settings. The panorama is now overlaid with a grid, and you can drag the corners and edges of the panorama to change its shape. Or, from the Projection button at the top, you can choose different projection modes. Here we’ve chosen Cylinder (Vertical), which entirely removed the warp on the walls in the image.  You can pan around the image, and get the part you find most important in the center.  Click the Apply button on the top when you’re finished making changes, or click Revert if you want to switch to the default view settings. Once you’ve finished your masterpiece, you can export it easily to common photo formats from the Export panel on the bottom.  You can choose to scale the image or set it to a maximum width and height as well.  Click Export to disk to save the photo to your computer, or select Publish to Photosynth to post your panorama online. Alternately, from the File menu you can choose to save the panorama as .spj file.  This preserves all of your settings in the Image Composite Editor so you can edit it more in the future if you wish.   Conclusion Whether you’re trying to capture the inside of a building or a tall tree, the extra tools in Microsoft Image Composite Editor let you make nicer panoramas than you ever thought possible.  We found the final results surprisingly accurate to the real buildings and objects, especially after tweaking the projection modes.  This tool can be both fun and useful, so give it a try and let us know what you’ve found it useful for. Works with 32 & 64-bit versions of XP, Vista, and Windows 7 Link Download Microsoft Image Composite Editor Similar Articles Productive Geek Tips Change or Set the Greasemonkey Script Editor in FirefoxNew Vista Syntax for Opening Control Panel Items from the Command-lineTune Your ClearType Font Settings in Windows VistaChange the Default Editor From Nano on Ubuntu LinuxMake MSE Create a Restore Point Before Cleaning Malware TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Xobni Plus for Outlook All My Movies 5.9 CloudBerry Online Backup 1.5 for Windows Home Server Snagit 10 Get a free copy of WinUtilities Pro 2010 World Cup Schedule Boot Snooze – Reboot and then Standby or Hibernate Customize Everything Related to Dates, Times, Currency and Measurement in Windows 7 Google Earth replacement Icon (Icons we like) Build Great Charts in Excel with Chart Advisor

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  • POP Culture

    - by [email protected]
    When we hear the word POP, we normally think of a soft drink, or a soda, while for others, it might be their favourite kind of music. In my case, it's the sound my knee makes when I bend down. Within Oracle though, when we talk about POP, we are referring to the Partner Ordering Portal. The Partner Ordering Portal, or POP as we like to call it, provides AutoVue Partners with a method to submit their orders online. POP offers Partners with up-to-date pricing and licensing information, efficient order processing, as most data is validated on screen, thereby reducing errors and enabling faster processing and, online order status and tracking. POP is not yet available in every country, but it is available in most. Click here to check out the POP home page (OPN Login information required) to see if your country of business is eligible to use POP and, for access to creating an account, watching instructional training viewlets, etc.

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  • How To Run A Shell Script Again And Again Having X Interval Of Time?

    - by Muhammad Hassan
    I have a shell script in my Ubuntu Server 14.04 LTS at ./ShellScript.sh. I setup /etc/rc.local to run the shell script after boot but before login using below code. Run this: sudo nano /etc/rc.local then add following and save. #!/bin/sh -e # # rc.local # # This script is executed at the end of each multiuser runlevel. # Make sure that the script will "exit 0" on success or any other # value on error. # # In order to enable or disable this script just change the execution # bits. # # By default this script does nothing. #!/bin/bash ./ShellScript.sh exit 0 Now I want to run/execute this shell script again and again having 15min of time interval between every run after boot but before login. So Can I do it? Update 1:) When I run crontab -e then I got the following. Now What to do? no crontab for root - using an empty one Select an editor. To change later, run 'select-editor'. 1. /bin/ed 2. /bin/nano <---- easiest 3. /usr/bin/vim.basic 4. /usr/bin/vim.tiny Choose 1-4 [2]: After selecting 2, I got crontab: "/usr/bin/sensible-editor" exited with status 2 UPDATE 2:) Update ShellScript.sh like below... #!/bin/bash # Testing ShellScript... while true do echo "ShellScript Start Running..." ********************************** All My Shell Script Codes/Script/Commands ********************************** echo "ShellScript End Running..." exit 0 sleep 900 done Then Run this: sudo nano /etc/rc.local then add following and save. #!/bin/sh -e # # rc.local # # This script is executed at the end of each multiuser runlevel. # Make sure that the script will "exit 0" on success or any other # value on error. # # In order to enable or disable this script just change the execution # bits. # # By default this script does nothing. sh ./ShellScript.sh & exit 0

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  • Apple II Teardown and Restoration Offers a Peek at Computing History [Video]

    - by Jason Fitzpatrick
    In this extended teardown video, we’re granted a peek at the guts of an Apple IIe and treated to quite a bit of Apple IIe history in the process. Todd Harrison, via his project blog ToddFun, shares videos of his Apple IIe restoration project. The videos are lengthy, but include close up examination of all the parts and lots of information about the history of the computer and its construction. You can check out the rest of his Apple II videos and posts at the link below. Apple II Plus from 1982 teardown, repair, cleanup and demonstration [via The Unofficial Apple Weblog] HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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  • Plymouth did not install properly

    - by David Starkey
    I was installing the plymouth manager in hopes of making a custom loading screen. While the terminal was working, my computer unexpectedly powered off. I can open up the manager and it appears to do what it is supposed to (minus the fact that I can't make my own theme) and the screen only shows on powering down. Anyway, all of the advice I have seen so far have resulted in errors and nothing getting fixed. I do not have permissions to simply select the folder and delete it for some reason and I have not been able to find out how to grant myself those permissions. I guess my question then is how do I get rid of the plymouth manager so I can reinstall it properly? Already tried: -Installation - http://www.noobslab.com/2011/11/install-plymouth-manager-and-change.html -Removal - How to remove Plymouth Boot Animation manager and keep the default boot screen -Permissions - How do I change my user permissions to edit /etc/apt/sources.list? -Theming Guide - http://brej.org/blog/?p=158

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  • Best practices for logging user actions in production

    - by anthonypliu
    I was planning on logging a lot of different stuff in my production environment, things like when a user: Logs In, Logs Off Change Profile Edit Account settings Change password ... etc Is this a good practice to do on a production enviornment? Also what is a good way to log all this. I am currently using the following code block to log to: public void LogMessageToFile(string msg) { System.IO.StreamWriter sw = System.IO.File.AppendText( GetTempPath() + @"MyLogFile.txt"); try { string logLine = System.String.Format( "{0:G}: {1}.", System.DateTime.Now, msg); sw.WriteLine(logLine); } finally { sw.Close(); } } Will this be ok for production? My application is very new so im not expecting millions of users right away or anything, looking for the best practices to keeping track of actions on a website or if its even best practice to.

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  • Why doesn't `cd` work in a shell script?

    - by alex
    what is wrong with this easy script? I just want to write an script which change my directory: A. I put below commands on the file witch its name is pathABC on the /home/alex directory, #!/bin/sh cd /home/alex/Documents/A/B/C echo HelloWorld B. also I did chmod +x pathABC , On the terminal when I am on the /home/alex directory, I run ./pathABC . But the output is just HelloWorld and the current directory remains with no change. I mean my directory remains as /home/alex and not go to the /home/alex/Documents/A/B/C. So where is wrong?

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  • How to create projection/view matrix for hole in the monitor effect

    - by Mr Bell
    Lets say I have my XNA app window that is sized at 640 x 480 pixels. Now lets say I have a cube model with its poly's facing in to make a room. This cube is sized 640 units wide by 480 units high by 480 units deep. Lets say the camera is somewhere in front of the box looking at it. How can I set up the view and projection matrices such that the front edge of the box lines up exactly with the edges of the application window? It seems like this should probably involve the Matrix.CreatePerspectiveOffCenter method, but I don't fully understand how the parameters translate on to the screen. For reference, the end result will be something like Johhny Lee's wii head tracking demo: http://www.youtube.com/watch?v=Jd3-eiid-Uw&feature=player_embedded P.S. I realize that his source code is available, but I am afraid I haven't been able to make heads or tails out of it.

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  • WPF: Timers

    - by Ilya Verbitskiy
    I believe, once your WPF application will need to execute something periodically, and today I would like to discuss how to do that. There are two possible solutions. You can use classical System.Threading.Timer class or System.Windows.Threading.DispatcherTimer class, which is the part of WPF. I have created an application to show you how to use the API.     Let’s take a look how you can implement timer using System.Threading.Timer class. First of all, it has to be initialized.   1: private Timer timer; 2:   3: public MainWindow() 4: { 5: // Form initialization code 6: 7: timer = new Timer(OnTimer, null, Timeout.InfiniteTimeSpan, Timeout.InfiniteTimeSpan); 8: }   Timer’s constructor accepts four parameters. The first one is the callback method which is executed when timer ticks. I will show it to you soon. The second parameter is a state which is passed to the callback. It is null because there is nothing to pass this time. The third parameter is the amount of time to delay before the callback parameter invokes its methods. I use System.Threading.Timeout helper class to represent infinite timeout which simply means the timer is not going to start at the moment. And the final fourth parameter represents the time interval between invocations of the methods referenced by callback. Infinite timeout timespan means the callback method will be executed just once. Well, the timer has been created. Let’s take a look how you can start the timer.   1: private void StartTimer(object sender, RoutedEventArgs e) 2: { 3: timer.Change(TimeSpan.Zero, new TimeSpan(0, 0, 1)); 4:   5: // Disable the start buttons and enable the reset button. 6: }   The timer is started by calling its Change method. It accepts two arguments: the amount of time to delay before the invoking the callback method and the time interval between invocations of the callback. TimeSpan.Zero means we start the timer immediately and TimeSpan(0, 0, 1) tells the timer to tick every second. There is one method hasn’t been shown yet. This is the callback method OnTimer which does a simple task: it shows current time in the center of the screen. Unfortunately you cannot simple write something like this:   1: clock.Content = DateTime.Now.ToString("hh:mm:ss");   The reason is Timer runs callback method on a separate thread, and it is not possible to access GUI controls from a non-GUI thread. You can avoid the problem using System.Windows.Threading.Dispatcher class.   1: private void OnTimer(object state) 2: { 3: Dispatcher.Invoke(() => ShowTime()); 4: } 5:   6: private void ShowTime() 7: { 8: clock.Content = DateTime.Now.ToString("hh:mm:ss"); 9: }   You can build similar application using System.Windows.Threading.DispatcherTimer class. The class represents a timer which is integrated into the Dispatcher queue. It means that your callback method is executed on GUI thread and you can write a code which updates your GUI components directly.   1: private DispatcherTimer dispatcherTimer; 2:   3: public MainWindow() 4: { 5: // Form initialization code 6:   7: dispatcherTimer = new DispatcherTimer { Interval = new TimeSpan(0, 0, 1) }; 8: dispatcherTimer.Tick += OnDispatcherTimer; 9: } Dispatcher timer has nicer and cleaner API. All you need is to specify tick interval and Tick event handler. The you just call Start method to start the timer.   private void StartDispatcher(object sender, RoutedEventArgs e) { dispatcherTimer.Start(); // Disable the start buttons and enable the reset button. } And, since the Tick event handler is executed on GUI thread, the code which sets the actual time is straightforward.   1: private void OnDispatcherTimer(object sender, EventArgs e) 2: { 3: ShowTime(); 4: } We’re almost done. Let’s take a look how to stop the timers. It is easy with the Dispatcher Timer.   1: dispatcherTimer.Stop(); And slightly more complicated with the Timer. You should use Change method again.   1: timer.Change(Timeout.InfiniteTimeSpan, Timeout.InfiniteTimeSpan); What is the best way to add timer into an application? The Dispatcher Timer has simple interface, but its advantages are disadvantages at the same time. You should not use it if your Tick event handler executes time-consuming operations. It freezes your window which it is executing the event handler method. You should think about using System.Threading.Timer in this case. The code is available on GitHub.

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  • Even EA's Have Bad Days - it's Time to Reset

    - by Pat Shepherd
    I saw this article and thought I'd share it because, even we EA's have bad days and the 7 points listed are a great way for you to hit the "reset" button. From Geoffrey James on INC.COM, here are 7 ways to change your view of things when, say, you are hitting a frustration point coordinating stakeholders to agree on an approach (never happens, right?) Positive Thinking: 7 Easy Ways to Improve a Bad Day http://www.inc.com/geoffrey-james/positive-thinking-7-easy-ways-to-improve-a-bad-day.html To paraphrase:          You can decide (in an instant) to change patterns of the past          Believe in (or even visualize) good things happening, and they will          Keep a healthy perspective on the work-life / life-life continuum (what things REALLY matter in the big scheme of things)                  Focus on the good (the laws of positive-attraction apply)

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  • Chuck Esterbrook: Geek of the Week

    The Cobra Programming Language is an exciting new general-purpose Open-source language for .NET or Mono, which features unit tests, contracts, informative asserts, generics, Compile-time nil/null tracking, lambda expressions, closures, list comprehensions and generators. Even if it had been developed by a team, it would have been a remarkable achievement. The surprise is that it is the work of one programmer with help from a group of users. We sent Richard to find out more about that one progra...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • New JDeveloper/ADF book hits the bookshelves

    - by Grant Ronald
    I've just received a nice new copy of Sten Vesterli's book Oracle ADF Enterprise Application Development - Made Simple.  I was one of the technical reviewers of the book but I'm looking forward to be able to read it end-to-end in good old fashioned book format this coming week. The book bridges the gap between those existing books that describe Oracle ADF features, and real world ADF development.  So, source control, bug tracking, estimating, testing, security, packaging etc are all covered.  Of course, every project and situation is different so the book could never supply a one-size-fits-all guide, but I think its a good addition to your ADF bookshelf.  I'll hopefully post a full review in the coming weeks. Oh, and congratulations Sten,  having gone through the pain of writing my own ADF book, I take my hat off to anyone who goes through the same journey!

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