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• Bullet physics engine, how to freeze an object?

  - by Markus

  Using Bullet 2.76 I'm trying to freeze an object (rigid body) so that it instantly stops moving, but still responds to collisions. I tried setting it's activation state to DISABLE_SIMULATION, but then it's virtually nonexistent to other objects. Furthermore, if objects "collide" with it when it's disabled, strange things begin to happen (object's falling through static bodies, etc.) I suppose, temporarily converting it to a static rigid body could work, but is there an existing "native" way to achieve this on Bullet's side? Edit: Is there a way to turn off gravity for a specific object?

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• Asp.net regularexpressionvalidator fires even when CausesValidation="false"

  - by Rohit

  I have a regularexpression validator which validates a valid email. I have two buttons on my form. Submit and undo. On undo, we are reverting the page state to default submit has it validationgroup set while undo doesnot have any validationgroup and CausesValidation="false". Now when i navigate to page and enter invalid emailaddress,i directly click undo. the validator fires and stops my page from posting.however if i press tab and navigate to other control and then click undo,the validator shows error message but posts back and furthur proessing is done. This is very strange and i want the page to postback without any error message when i click undo.how to achieve it.

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• Nokogiri Truncating XML Input

  - by bdorry

  I am having issues with a colleagues machine truncating XML while using Nokogiri to parse a Media RSS feed. The feed is a standard Media RSS feed, and the XML is not malformed. It looks like it simply stops at a certain point in the XML and closes any tags that would have been open at that current point in the document. (Unfortunately I do not have the XML avialable to me right now, but I will update this question with the actual XML when I have it available to me). My confusion comes from it working fine on my machine (OSX 10.6, Nokogiri 1.4.4) while it in correctly on his machine using the same setup - however his machine is a few years older. I imagine that there is a difference somewhere but unfortunately I don't know what to look for. Any thoughts or direction would be greatly appreciated.

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• In forms application, is there any Alternative to MsgBox?

  - by GuruC

  I like how MsgBox stops all further processing until it's clicked but I don't like how it pops that little msgbox in the middle of the screen, which I then have bring to the front if there is a window covering it. Is there a way to do something like a msgbox but keep it on my Form (which is always in view) so I can go ahead and click a button on the form instead of having to bring the little msgbox window on top of windows that may be covering it. I use the msgbox to inform me that a certain situation has happened, which I manually fix and when I'm done I click the MsgBox to continue processing. It'd be nice to have this button right on the form.

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• What would you use for deployment scripts in Java?

  - by Nadav

  Hi, I'm working on a Java web project that uses Maven to build its artifacts. At the end of the Maven build we have a few jar and war files that we need to deploy onto our development/testing environment. Right now we're using a pretty hefty Ant script that performs several tasks (on both Windows/Linux machines) Starts/Stops services Copies/deletes files Builds some stuff and then executes it Etc Ant does the job well - but the script is quickly getting very large, and to be honest, it feels inadequate for the task at hand. Are there other alternatives? I've heard of gant, but I'm not sure that's the right way to go. Thanks for helping!

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• Multiple Input From Keyboard C# WPF

  - by Alex

  I am writing a Tetris clone in WPF. If I hold down the right arrow key, the current piece shifts right. For playability, I want to allow the user to press another key (i.e. F-key) and rotate the moving piece without having to let go of the right arrow key first. Currently when I do this, the piece stops shifting. My first basic attempt at this was hooking into Window_PreviewKeyDown(object sender, KeyEventArgs e) and then sending a message to the controller layer. How do I structure my input-listening code to allow this? My current code Here

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• Problem with "write" function in linux

  - by Dumitru Catalin

  I am trying to write 2 server/client programs under Linux, in which they communicate through named pipes. The problem is that sometimes when I try to write from the server into a pipe that doesn't exist anymore (the client has stopped), I get a "Resource temporarily unavailable" error and the server stops completely. I understand that this is caused by using a O_NONBLOCK parameter when opening the fifo chanel, indicating the point where the program would usually wait until it could write again in the file, but is there a way to stop this behavior, and not halt the entire program if a problem occurs (shouldn't the write command return -1 ad the program continue normally)? And another strange thing is that this error only occurs when running the programs outside the ide (eclipse). If I run both programs inside eclipse, on error the write function just returns -1 and the programs continues normally.

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• Aquamacs and IDLWAVE

  - by nicolavianello

  I've just installed the new Aquamacs 2.0 in my Mac Os X 10.6.3 and I'm an happy user of IDLWAVE on Aquamacs for programming in IDL. Unfortunately I run into a problem which I can't understand. I used in my configuration file to put the following (setq idlwave-surround-by-blank t) for the beautiful space around operator. This used to work till Aquamacs 2.0 preview b3 (third beta release) from that on, it stops to work and every time I type an operator (the same for '=' '<' '' etc) I got the following message Debugger entered--Lisp error: (void-variable idlwave-expand-equal) (lambda nil (interactive) (self-insert-command 1) idlwave-expand- equal -1 -1)() call-interactively((lambda nil (interactive) (self-insert-command 1) idlwave-expand-equal -1 -1) nil nil) Any help is welcommed

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• Can I make valgrind ignore glibc libraries?

  - by Jack

  Is it possible to tell valgrind to ignore some set of libraries? Specifically glibc libraries.. Actual Problem: I have some code that runs fine in normal execution. No leaks etc. When I try to run it through valgrind, I get core dumps and program restarts/stops. Core usually points to glibc functions (usually fseek, mutex etc). I understand that there might be some issue with incompatible glibc / valgrind version. I tried various valgrind releases and glibc versions but no luck. Any suggestions?

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• Can you have too many Delegate.BeginInvoke calls at once?

  - by stewsha

  I am cleaning up some old code converting it to work asynchronously. psDelegate.GetStops decStops = psLoadRetrieve.GetLoadStopsByLoadID; var arStops = decStops.BeginInvoke(loadID, null, null); WaitHandle.WaitAll(new WaitHandle[] { arStops.AsyncWaitHandle }); var stops = decStops.EndInvoke(arStops); Above is a single example of what I am doing for asynchronous work. My plan is to have close to 20 different delegates running. All will call BeginInvoke and wait until they are all complete before calling EndInvoke. My question is will having so many delegates running cause problems? I understand that BeginInvoke uses the ThreadPool to do work and that has a limit of 25 threads. 20 is under that limit but it is very likely that other parts of the system could be using any number of threads from the ThreadPool as well. Thanks!

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• Content pulled in via jQuery AJAX is not associating with previous functions

  - by Jarsen

  I'm using the jquery .load() function to pull in data to populate a div with. The content I'm pulling in has CSS selectors that should match up with jQuery click functions I've written. However, when I load in the data, although the correct CSS selectors are there, when I click on areas that should invoke a response from jQuery, nothing happens. Do I need to do some sort of reload? Here's the code I've got for the jQuery AJAX: $(document).ready(function() { // AJAX functionality for drupal nodes $(".ajax_node").click(function() { var ajax_src = $(this).attr("href"); // we're gonna load the href // empty target div and load in content // the space in the string before the #id is necessary $("#ajax_area").empty().load(ajax_src + " #ajax_wrapper"); return false; // stops the link from following through }); // General AJAX fucntionality $(".ajax").click(function() { var ajax_src = $(this).attr("href"); $("#ajax_area").empty().load(ajax_src); return false; }); });

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• use boolean with visible, as3

  - by VideoDnd

  Is there a better way to do use a use a boolean with visible? This animation blinks 30 times and stops. It works without error, but takes a moment to load. I would like to learn other ways of using visibility with conditionals. var timz:Timer = new Timer(100,30); timz.addEventListener(TimerEvent.TIMER, doIt); var condition:Number = 5; function doIt(event:TimerEvent):void{ trace("fire!"); if(condition=5){ box.visible = !box.visible; } } timz.start();

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• AS3 for an animated button

  - by Jenya

  I need help with AS3 for an animated button. The button (movie clip) I've created starts playing on a mouse-over but stops immediately when a mouse-out event occurs. But I want the button to finish the loop cycle before stopping the animation and play the animation on the next mouse-over from frame 1. This is the code I have so far: stop(); bt.addEventListener(MouseEvent.MOUSE_OVER,onMouseOver); function onMouseOver(event:MouseEvent):void { gotoAndPlay(1); } Thanks in advance, Jenya

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• Is there a way to "freeze" a file in Git?

  - by Suan

  I'm in a situation where I want to open source my project, however there's a single source file that I want to release a "clean" version of, but use a separate version locally. Does git have a feature where I can just commit a file once, and it stops looking for changes on that file from now on? I've tried adding the file to .gitignore, but after the first time when I do a git add -f and git commit on the file, and I proceed to edit it again, git status shows the file as changed. The ideal behavior would be for git to not show this file as changed from now on, even though I've edited it. I'd also be interested in how others have dealt with "scrubbing" their codebases of private code/data before pushing to an open source repo, especially on Git.

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• How do you make Python wait so that you can read the output?

  - by anonnoir

  I've always been a heavy user of Notepad2, as it is fast, feature-rich, and supports syntax highlighting. Recently I've been using it for Python. My problem: when I finish editing a certain Python source code, and try to launch it, the screen disappears before I can see the output pop up. Is there any way for me to make the results wait so that I can read it, short of using an input() or time-delay function? Otherwise I'd have to use IDLE, because of the output that stops for you to read. (My apologies if this question is a silly one, but I'm very new at Python and programming in general.)

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• Bash variable kills script execusion

  - by Kyle Terry

  Sorry if this is better suited at serverfault, but I think it learns more towards the programming side of things. I have some code that's going into /etc/rc.local to detect what type of touch screen monitor is plugged in and changes out the xorg.conf before launching X. Here is a small snippet: CURRENT_MONITOR=`ls /dev/usb | grep 'egalax_touch\|quanta_touch'` case $CURRENT_MONITOR in '') CURRENT_MONITOR='none' ;; esac If one of those two touch screens is plugged in, it works just fine. If any other monitor is plugged in, it stops at the "CURRENT_MONITOR=ls /dev/usb | grep 'egalax_touch\|quanta_touch'." For testing I touched two files. One before creating CURRENT_MONITOR and one after CURRENT_MONITOR and only file touched before is created. I'm not a bash programmer so this might be something very obvious.

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• Eventlogtracelistener not working on windows server 2008?

  - by djerry

  Hey guys, I'm trying to debug a service to tries to start but is immediatly stopped. I'm integrating an eventlogtracelistener, and tested it on my pc. When i start the service, i get 5 logs in my eventviewer. One is even the first thing it calls. When i install my service on the server, and try to start it, i don't get even 1 log in evenlogs and as i said before, i starts, takes 1 second and then stops automatically. Doesn't my service has the rights to write to eventlog? Thanks in advance.

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• Bash variable kills script execution

  - by Kyle Terry

  Sorry if this is better suited at serverfault, but I think it learns more towards the programming side of things. I have some code that's going into /etc/rc.local to detect what type of touch screen monitor is plugged in and changes out the xorg.conf before launching X. Here is a small snippet: CURRENT_MONITOR=`ls /dev/usb | grep 'egalax_touch\|quanta_touch'` case $CURRENT_MONITOR in '') CURRENT_MONITOR='none' ;; esac If one of those two touch screens is plugged in, it works just fine. If any other monitor is plugged in, it stops at the "CURRENT_MONITOR=ls /dev/usb | grep 'egalax_touch\|quanta_touch'." For testing I touched two files. One before creating CURRENT_MONITOR and one after CURRENT_MONITOR and only file touched before is created. I'm not a bash programmer so this might be something very obvious.

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• PHP is not returning me a number type

  - by Tristan

  Hello, i tryed to follow that great tutorial (STAR rating with css : http://stackoverflow.com/questions/1987524/turn-a-number-into-star-rating-display-using-jquery-and-css) but i've just a big problem : When i do <span class="stars">1.75</span> or $foo='1.75'; echo '<span class="stars">'.$foo.'</span> the stars is correctly shown, but as soon as i do : while($val = mysql_fetch_array($result)) { $average = ($val['services'] + $val['serviceCli'] + $val['interface'] + $val['qualite'] + $val['rapport'] ) / 5 ; <span class="stars">.$average.</span> } the stars stops working i double checked the data type in mysql : they're all TINYINT(2) and i tryed that : $average = intval($average); but it's still not working, Thank you

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• WCF: Callback is not asynchronous

  - by Aquarius

  Hi, I'm trying to program a client server based on the callback infrastructure provided by WCF but it isn't working asynchronously. My client connects to the server calling a login method, where I save the clients callback channel by doing MyCallback callback = OperationContext.Current.GetCallbackChannel() After that the server does some processing and uses the callback object to communicate with the client. All this works, the problem resides on the fact that even though I've set the method in the OperationContract as IsOneWay=true, the server still hangs when doing the call to the client. I've tested this by launching the server for debug in the visual studio, detaching it, launching the client, calling the above mentioned login method, putting a break point in the implemented callback method of the client, and making the server send a response to the client. The server stops doing what it's supposed to do, waiting for the response of the client. Any help is appreciated.

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• Forked Function not assigning pointer

  - by Luke Mcneice

  In the code below I have a function int GetTempString(char Query[]); calling it in main works fine. However, when calling the function from a fork the fork hangs (stops running, no errors, no output) before this line: pch = strtok (Query," ,"); the printf shows that the pointer to pch is null. Again this only happens when the fork is executing it. What am I doing doing wrong? int main() { if((Timer =fork())==-1) printf("Timer Fork Failed"); else if(Timer==0) { while(1) { sleep(2); GetTempString("ch 1,2,3,4"); } } else { //CODE GetTempString("ch 1,2,3,4"); } } int GetTempString(char Query[]) { char * pch; printf("DEBUG: '%s'-'%d'\n",Query,pch); pch = strtok (Query," ,");//* PROBLEM HERE* //while loop for strtok... return 1; }

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• Make errors - can the gcc compiler warnings prevent a C file from being compiled into an object file

  - by Xolstice

  I'm trying to compile a wireless network card driver for my Linux box and I ran into a problem with the Make command. During the compilation process I normally see warnings on some of the C files that being are compiled; despite the warnings these files were still able to be compiled to an object file. When the Make process comes to a file called rtmp_wext.c however, the compiler generates a large number of warnings and then the whole Make process stops and returns an exit status of error 1, i.e. make: *** [rtmp_wext.o] Error 1. Usually I see an error with the C file for compilation to halt. This is the first time where it seems compiler warnings are preventing the file from being turned into an object file; is this possible or is something else the cause for the unsuccessful compilation?

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• valgrind - ignore glibc functions?

  - by Jack

  Is it possible to tell valgrind to ignore some set of libraries? Specifically glibc libraries.. Actual Problem: I have some code that runs fine in normal execution. No leaks etc. When I try to run it through valgrind, I get core dumps and program restarts/stops. Core usually points to glibc functions (usually fseek, mutex etc). I understand that there might be some issue with incompatible glibc / valgrind version. I tried various valgrind releases and glibc versions but no luck. Any suggestions?

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• PhysX: Joint friction/"stiff" joints

  - by SigTerm

  I'm working with physx (trying to add ik to ragdoll) at the moment. For some reason, all ragdoll joints are frictionless, and as a result, ragdoll tend to "wobble", especially when it is hung in the air and is connected to several moving kinematic actors. I would like to add friction to the joints and make them "stiff". Imagine a door (with extremely rusty hinge) that needs to be kicked several times to be open - i.e. it rotates around the hinge, but not much, quickly stops, and large force is required to make it rotate. Or think about art manikins (see google images for pictures) - their limbs move around, but they do not swing around freely. Unfortunately, I can't find anything related to joint friction in physx. I've checked documentation, google, and headers, and couldn't find anything useful. So, how do I implement stiff joints/joint friction with physx? (I think) I've seen physx games without that problem, so apparently there should be some way to do that.

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• How to solve this problem with lists?

  - by osabri

  what i don't understand in my task here what kind of list i can use, and if it should have 2 attributes key and value ? or only value? with pointers to another node ofc the task: "design a function which create a list using input from the keyboard _ the prefered solution. Assume that some magic stops the input; so the length of a list is not known in advance.(alternative solution: a function which creates explicitly a fixed list. However, all other function can not assume any knowledge about the length of lists). Necessary utilities( additional functions to be created): a function which deallocates the memory used for lists and a function which prints the content of the list. let the element of lists contain a letter. Design a function which create a copy of such list. can't also understand the list line !!!!!???

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