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  • Target tracking with a small delay (actionscript 3.0)

    - by John Dodson
    I'm having trouble thinking of a good method to track my character with an enemy attack. Of course, I don't want the attack to track my character's current position; I want it to track where the character was about 1 second before (so you can move around and make the attack miss and loop around you sort of a thing). The general structure of my game uses a timer to update all of my events. I have a timer going off every 25 milliseconds that updates everything, including my player's position and the enemies position. Right now I just have the enemy attack directly targeting my character....which works fine except that it's impossible to escape =p. Let me know if I didn't supply enough details. My approach was going to basically be get my character's position from about 1 second ago, then have the enemy target that position, the only problem is I can't think of a good way to get my character's position from previous times. Thanks for the help!

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  • Displaying and updating score in Android (OpenGL ES 2)

    - by user16547
    I'm using a FrameLayout where I have a GLSurfaceView at the bottom and a few Views on top of it. One of those Views is a TextView that displays the current score. Here's how I'm updating the score TextView based on what happens in my game loop: whenever an event happens that increases the score, I call activity.runOnUiThread(updater), where activity is the activity that has the above FrameLayout (my main game activity) and updater is just a Runnable that increments the score. From my understanding, using runOnUiThread() from the OpenGL thread is standard practice - otherwise you'll get an exception, I can't remember its name. The problem is that there's a very noticeable lag between the event and the score update. For example the character gets a coin, but the coin count is not updated quickly. I tried summing all the score events from my game loop and calling runOnUiThread() only once per loop, but it doesn't seem to make much of a difference - the lag is still noticeable. How can I improve my design to avoid this lag?

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  • How to change the terminal to SCO compliant

    - by kaushik
    I have a server in which SCO 5.x is installed. I have several thin clients which were supplied from our head office. Those thin clients have linux pre-installed in them. When we tried to connect to our SCO server, we have found out that the thin client does not support SCO terminal type. So the program (Which is written in Oracle forms) is not working correctly. Lots of function keys stopped working and screen also not getting refreshed correctly. Hence we decided to use Ubuntu Live USB keys in thin clients. Now the problem is how can we change the terminal type to SCO in ubuntu ? Means I want it in the text terminal (Alt+Ctrl+F1,F2...) (Not in xterm...graphical terminal emulators). Does ubuntu support SCO terminal type ?

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  • what's wrong with this Lua code (creating text inside listener in Corona)

    - by Greg
    If you double/triple click on the myObject here the text does NOT disappear. Why is this not working when there are multiple events being fired? That is, are there actually multiple "text" objects, with some existing but no longer having a reference to them held by the local "myText" variable? Do I have to manually removeSelf() on the local "myText" field before assigning it another "display.newText(...)"? display.setStatusBar( display.HiddenStatusBar ) local myText local function hideMyText(event) print ("hideMyText") myText.isVisible = false end local function showTextListener(event) if event.phase == "began" then print("showTextListener") myText = display.newText("Hello World!", 0, 0, native.systemFont, 30) timer.performWithDelay(1000, hideMyText, 1 ) end end -- Display object to press to show text local myObject = display.newImage( "inventory_button.png", display.contentWidth/2, display.contentHeight/2) myObject:addEventListener("touch", showTextListener) Question 2 - Also why is it the case that if I add a line BEFORE "myText = ..." of: a) "if myText then myText:removeSelf() end" = THIS FIXES THINGS, whereas b) "if myText then myText=nil end" = DOES NOT FIX THINGS Interested in hearing how Lua works here re the answer...

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  • How To See Who Logged Into a Computer and When

    - by Chris Hoffman
    Have you ever wanted to monitor who’s logging into your computer and when? On Professional editions of Windows, you can enable logon auditing to have Windows track which user accounts log in and when. The Audit logon events setting tracks both local logins and network logins. Each logon event specifies the user account that logged on and the time the login took place. You can also see when users logged off. How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using? HTG Explains: What The Windows Event Viewer Is and How You Can Use It

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  • Resolving a collision between point and moving line

    - by Conundrumer
    I am designing a 2d physics engine that uses Verlet integration for moving points (velocities mentioned below can be derived), constraints to represent moving line segments, and continuous collision detection to resolve collisions between moving points and static lines, and collisions between moving/static points and moving lines. I already know how to calculate the Time of Impact for both types of collision events, and how to resolve moving point static line collisions. However, I can't figure out how to resolve moving/static point moving line collisions. Here are the initial conditions in a point and moving line collision event. We have a line segment joined by two points, A and B. At this instant, point P is touching/colliding with line AB. These points have unit mass and some might have an initial velocity, unless point P is static. The line is massless and has no explicit rotational component, since points A and B could freely move around, extending or contracting the line as a result (which will be fixed later by the constraint solver). Collision is inelastic. What are the final velocities of the points after collision?

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  • Python service using Upstart on Ubuntu

    - by Soumya Simanta
    I want to create to deploy a heartbeat service (a python script) as a service using Upstart. My understanding is that I've to add a /etc/init/myheartbeatservice.conf with the following contents. # my heartbeat service description "Heartbeat monitor" start on startup stop on shutdown script exec /path/to/my/python/script.py end script My script starts another service process and the monitors the processes and sends heartbeat to an outside server regularly. Are startup and shutdown the correct events ? Also my script create a new thread. I'm assuming I also need to add fork daemon to my conf file? Thanks.

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  • What does "GPL with classpath exception" mean in practice?

    - by Thilo
    Oracle seems to license all their Java-related open source code under the GPL with a classpath exception. From what I understand, this seems to allow to combine these libraries with your own code into products that do not have to be covered by the GPL. How does this work? What are examples of how I can and cannot use these classes? Why was this new license used as opposed to the LGPL, which seems to allow for pretty much the same things, but is better established and understood? What are the differences to the LGPL?

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  • Should I concentrate on writing code for money or my studies while in college?

    - by A-Cube
    I am college student of Software Engineering. My worries are that while I am concentrating on my studies, my peers are getting down with the code (e.g. HTML, ASP, PHP, etc) to earn money. Should I be worried that I am not doing coding like them? I was asked to be Microsoft Student Partner but I refused because the person what was doing before me told it was just arranging events. Nothing as such like getting with Microsoft and coding. Should I be writing code and earning money as I still am in 4th semester? I only have C++ as learning language in college. Will my job count on these projects that I do, or should I concentrate on studies for now to get maximum benefit?

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  • Google Search not displaying results from sub-pages

    - by nlovric
    I published a new site with some delicate content on September 26, 2012 UTC and no results from sub-pages - only from the main page - appear in Google Search. Entering "neven lovric" "cat out of the bag" into Google Search finds the main page. Is this type of behavior normal? I ask this because the first site was ceased - my account was locked - by the NameCheap, Inc. Risk Assessment Team, allegedly due to PayPal, Inc. reversing my payment for the extension of the registration of the domain before I was able to publish any content on it. In 2011 UTC, Google, Inc. blocked all results for certain keywords from being displayed to their users in the Arab Republic of Egypt during the demonstrations there. So, considering previous events, this is not an unlikely scenario in this case, also.

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  • What is the difference between these senior software engineer titles?

    - by stackoverflowuser2010
    I'm currently a senior research software engineer at a large company and am being offered a "senior staff engineer" position somewhere else. I am not sure if the new position's title conveys a sideways move or an advancement. So, all other things being roughly equal (salary, domain of expertise, etc.), what is the external difference between these software engineer titles (in general and regardless of any particular company, if possible): senior engineer senior research engineer senior staff engineer member of technical staff principal engineer Edit: Let me elaborate on "member of technical staff" since it's kind of uncommon. I think it's a high title, commonly associated with research. I know that Oracle, VMWare, and the old Bell Labs have these titles. See: Member of Technical Staff . I know what it means, but I don't know how it stacks up against the other titles, which is why I asked.

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  • Install Java on Ubuntu server (Parallels Plesk)

    - by atMaarten
    I want to install Java to my server so I can use PHP shell_exec to compile Java online. So I'm trying to install Java on my webserver (Ubuntu - Parallels Plesk). I logged in to the server with PuTTY and tried some commands like: sudo apt-get install openjdk-6-jre or sudo apt-get install oracle-java7-installer But than I get error's like: Package drweb-bases must be reinstalled, but there can be no archive found. I tried to uninstall drweb-bases, reinstall, no matter what. I still get that error. What you I need to do? I am doing it completly wrong? Am I not destroying my webserver? There is not much to find on this topic on Google.

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  • is a merchant account a requirment for a website to take payments

    - by calum
    I have had a quick look but couldn't see anything related. Basically, if we were to accept payments for events on our website, via paypal (essentially a Buy it now! button), as a business, do we need a merchant's account, or will a regular bank account be acceptable? I may have some confusion in terms. My understanding is you need a merchant's account to accept credit card payments, but as we are using PayPal, is this necessary? Thank you for any clarification. disclaimer - I've read What are some options for taking payments on my website? but it doesn't explicitly say if we require a merchant account or not. Thank you.

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  • Why didn't virtual ubuntu halts clearly?

    - by Dims
    I am running Ubuntu 11.10 on Oracle Virtual Box 4.2.4 under Windows 7 x64. To stop guest system I often use halt command which works fine on physical machines. But it looks hanging on virtual ubunty. After halt it starts shutting down, Ubuntu logo appears with dots below flashing. After some cycles it just stops. VM manager does not feel machine is gone, so I need to power off it. P.S. The system stops Ok if I shutdown it via GUI.

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  • How To View Upcoming Weather, Sports Games, TV Shows, and More in Google Calendar

    - by Chris Hoffman
    Google Calendar isn’t just a tool to keep track of your own events. You can subscribe to a number of special calendars that automatically update with the latest weather, sports games, air times for your favorite TV shows, and more. This is the sort of thing that a paper calendar could never do, and what makes digital calendars like Google Calendar so useful. Add some automatically updating calendars and you’ll wonder how people ever used paper calendars. HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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  • How to switch from developer to dba? [on hold]

    - by lamwaiman1988
    I am working as a developer for 3 years and I am thinking of switch to dba. I do not own any certificate nor received any training regarding the daily job of dba. My company also do not offer any chance of work/training related to a dba. If I want to be a dba ( because of the salary and a much stable job than developer ), should I go to get some oracle certificates? I've also heard that you can't be a good dba if you cannot get a good understanding about the working OS such as windows/unix ( and to do that you also need to get some certificate on windows administration or unix administration ) but they recommend book of Rich Stevens over certificate. I am confused on what should I do to make this happen.

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  • Auto convert odt to pdf

    - by Gautam K
    I am creating a few documents in Libre office and I have to always send them as .pdf. but each and every time I forget to export it as pdf , So is there any way to auto convert the .odt document into pdf every time I save the document ? I have only about 4 docs , I keep making changes on them , So each and every time I make a change and save the odt I need that change to be updated in the corresponding pdf file . Ps : I understand that unoconv can be used to convert via command line but is there a way to automatically do it ? Another Ps : I found out that there is something called inotify and inotify-tools and that can be used to trigger events when a file changes . But I have no idea on how to use it .

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  • Google Top Geek E02

    Google Top Geek E02 In Spanish! Google Top Geek is a weekly show that will cover the latest news on all things Google in Spanish speaking Latin America, trending searches, YouTube videos and apps in the region; as well as news and relevant events for developers. Mondays at noon, 12 PM, in Google Developers Live and the blog Programa con Google. Créditos E02: Agradecemos a Elefgant el apoyo para la grabación y edición. From: GoogleDevelopers Views: 4106 4 ratings Time: 15:43 More in Science & Technology

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  • How to track many in-game statistics

    - by Alex Schearer
    I am looking to track many in-game events, e.g. the score of each move, how many moves are taken, what types of moves, etc. A lot of stats can simply be tracked with a counter. In some cases I need to aggregate data in order to calculate the value (e.g. most common move). How are you tracking in-game stats for your games? How do you avoid creating a class with tens or hundreds of fields? How do you avoid littering the code with tracking invocations? How do you abstract the aggregate data so as to avoid rewriting it for each scenario?

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  • Aptana Studio 3 does not start up in Ubuntu 12.10

    - by Agent47DarkSoul
    I followed the instructions provided here to install Aptana Studio 3 in my Ubuntu 12.10. I have completed all the steps with out any problems. When I click the Aptana icon in my Unity bar nothing happens. No error pops up! I gave permission on the sh file and on the directory (/opt/Aptana_Studio_3) but still same problem. If I try executing the sh file in the /opt/Aptana_Studio_3 folder, it says "Syntax error: "(" unexpected Aptana". Also I cannot execute the Aptana binary file directly. I have been trying to solve the problem for a while now. Any help would be much appreciated. EDIT: I have Oracle Java 7 installed. I have read some post about backwards compatibility problem with Java 6 but dont know whether that's the issue. I will edit the question if I find something new.

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  • Is JQuery or Javascript are capable for image processing?

    - by adietan63
    My plan is to develop a web based application in the future. I think, i can named it "Booth Reservation System" for the Events companies here in our country. One of the main functionality of the system and the most tricky part/ difficult part is the user can upload a "floor plan"(the design of the area were the booth is located in any image format) then the user can select on the specific location on the floor plan to reserve the booth. Also, the user can create floor plan on the system as another functionality of the system. What do you think? What programming language that i can use to accomplished the system? thanks!

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  • I want to be a programmer! [closed]

    - by Mohamed Abd El Maged
    I am a doctor. I have a bachelor of medicine and general surgery. I want to change my career and work as a programmer in big companies such as Microsoft, Oracle, ... this is my dream ! I haven't got any degree in IT or Computer science. The question here is: Is it possible to achieve my dream and work as professional programmer in the future? Another question: if applicable, which certifications should I strive to get?

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  • Ask the Readers: Have You Cut the Cable Cord?

    - by Jason Fitzpatrick
    The proliferation of streaming services and diverse media content has made cutting the cable cord an appetizing option for many people. Have you cut the cord, stuck with traditional services, or mixed the two together? It’s easier than ever to ditch the cable subscription and still keep watching your favorite TV shows and movies (but still tricky to catch live events and television without a cable subscription). This week we’re interested in hearing all about your media arrangements: Do you have a traditional cable bundle? Ditched it for a Netflix-only experience? Pay for both because you just can’t get enough of live TV and streaming content? Sounds off in the comments with the state of your media setup, the more detailed the better, and then check back in on Friday for the What You Said roundup. 6 Ways Windows 8 Is More Secure Than Windows 7 HTG Explains: Why It’s Good That Your Computer’s RAM Is Full 10 Awesome Improvements For Desktop Users in Windows 8

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  • Blogging from 37,000ft

    - by Dave Ballantyne
    Im currently on my way to Sql Rally nordic and looking forward to a few days of full on SQL geekery and “Unleashing my inner Viking”.  I shall be speaking on Wednesday afternoon on one of my favourite subjects “Cursors are Evil”.  Ok,  so lets put it into perspective, “Evil” is a bit dramatic , but “Often use inappropriately and can cause serious performance bottlenecks” didn't have quite the same ring If you are not going to be at SQL Rally,  im going to be repeating it at the Leeds and Manchester user groups on the 23rd and 24th of November respectively.  Presenting with me on these nights will be James Boother, so make it along to those if you can.  I look forward to seeing you at one of these events.

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  • Enhanced LINQ to SQL Compatible ORM Solution from Devart

    Devart has recently announced the release of LinqConnect - an enhanced LINQ to SQL compatible ORM solution with extended functionality, support for SQL Server, Oracle, MySQL, PostgreSQL, and SQLite, its own visual model designer, seamlessly integrating to Visual Studio, and SQL monitoring tool. LinqConnect allows you to quickly create mapping model and generate data access layer code for your application, greatly decreasing development time and eliminating the need to work over routine tasks. It...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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