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• Texture allocations being doubled in iPhone OpenGL ES

  - by Kyle

  The below couple lines are called 15 times during initialization. The tx-size is reported at 512 everytime, so this will allocate a 1mb image in memory 15 times, for a total of 15mb used.. However, I noticed instruments is reporting a total of 31 allocations! (15*2)+1 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tx-size, tx-size, 0, GL_RGBA, GL_UNSIGNED_BYTE, spriteData); free(spriteData); Likewise in another area of my program that allocates 6 256x256x4 (256kB) textures.. I see 13 sitting there. (6*2)+1 Anyone know what's going on here? It seems like awful memory management, and I really hope it's my fault. Just to let everyone know, I'm on the simulator.

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• (fluxus) learning curve

  - by Inaimathi

  I'm trying to have some fun with fluxus, but its manual and online docs all seem to assume that the reader is already an expert network programmer who's never heard of Scheme before. Consequently, you get passages that try to explain the very basics of prefix notation, but assume that you know how to pipe sound-card data into the program, or setup and connect to an OSC process. Is there any tutorial out there that goes the opposite way? IE, assumes that you already have a handle on the Lisp/Scheme thing, but need some pointers before you can properly set up sound sources or an OSC server? Barring that, does anyone know how to get (for example) the system microphone to connect to (fluxus), or how to get it to play a sound file from disk?

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• Is there a free (as in beer) Flow chart generator for COBOL Code?

  - by btelles

  Hi I've never read COBOL in my life and have been tasked with rewriting the old COBOL code in a new language. Are there any free or free-to-try software packages out there that will generate a flow chart for a COBOL program? I've looked at "Visustin" and "Code Visual to Flowchart" Visustin blanks out part of the code and does random rotations in the demo version, which causes the demo to be less accurate. I couldn't get Code Visual Flow Chart to work correctly with our code. Know of any other packages I might try?

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• How do you get notified of your repos' updates?

  - by furtelwart

  I'm working on several repositories at work and would like to be informed, if anything changes in the SVN repositories. I made a small BAT script (yes, BAT is usefull sometimes) that keeps executing an svn log -r BASE:HEAD on my working copy. It shows all submit comments and revision dates. It works really well but it's not comfortable for different repositories. How do you keep track of changes in your repositories? Do you use a small program you made for yourself? Do you use software someone else made? I'm interested in every approach to this problem. I would like to get notifications and several more information about the commit. The IDE integrated functions are good, but work only if I request the information. I don't want to act to get this information. Platform: Windows, Subversion 1.5 and higher.

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• iPhone+Quartz+OpenGL. What is the correct way for Quartz and OpenGL to play nice together regarding

  - by dugla

  So we know the CoreGraphics/Quartz imaging model is based on pre-multiplied alpha. We also know that OpenGL blending is based on un-premultiplied alpha. What is the best practice to avoid head explosion when doing blending with textures that are derived from pre-multiplied alpha imagery (PNG files generated in Photoshop with pre-multiplied alpha). Given the apples/oranges mish mash of Quartz and OpenGL, what is the correct glBlendFunc for doing the fundamental Porter/Duff "over" operation? Typical example: A simple paint program. Brush shapes are texture-map patterns created from pre-multiplied alpha rgba images. Paint color is specified via glColor4(...) with the alpha channel used to control paint transparency. GL_MODULATE is used so the brush texture multiplies the (translucent) paint color to blend the color into the canvas. Problem: The texture is premult. The color is not. What is the correct way to handle this fundamental inconsistency? Thanks, Doug

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• Need to get back form controls' information externally

  - by Tom

  Are there any tutorials or guides out there that anyone knows of that will show me how to read forms from an external program and get back information about the controls on the form? Currently, I can get the handle to the form, and I can get the class name, but I need to get more information such as a persistent name and contained data. Thanks. Edit: I now have a way to read the contained data (with the WM_GETTEXT message), however, I still need a persistent name/ID that I can be sure will not change from instance to instance. One way I can think of for doing this is to take the handle, find the position of the control on the window, and then get the handle from the position from then on. Another way is to determine a static ID for the control and then use that to get the handle from then on. The new scope of my problem is how to implement either of these. Any Ideas?

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• Google App Engine - Help with running python shell comands from aptanna studio

  - by spidee

  Hi I'm somewhat of a newbie to python and I'm using app engine and aptanna studio - I need to run some python shell commands so that i can complete the tasks in this Tutorial on how to set up 118 and django. I have got this all working but i don't understand how i run the python commands to compile the dictionarys such as $ PYTHONPATH=/path/to/googleappengine/python/lib/django/ /path/to/googleappengine/python/lib/django/django/bin/make-messages.py -a To be honest - why am i saying that! I dont know where in aptanna studio i run this command -then worse I don't quite understand what exactly i type based on the above command line. My path to google app engine is D:\Program Files\Google\google_appengine\ Can anyone help shed some light on how i do this from aptanna / the root of my project?? Im following this Tutorial: http://makeyjl.blogspot.com/2009/02/using-djangos-i18n-in-google-app-engine.html

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• Add UIView behind UITableView in UITableViewController code

  - by Drew C

  I would like to use a fixed image as the background in a simple grouped table view in my iPhone program. Unfortunately, no matter what I do, the background is always solid white. I have followed several supposed solutions on this site and others to no avail. Here is the relavant code in the viewDidLoad method of the table view controller class (note, this code uses a solid blue color rather than an image for simplicity's sake): self.tableView.opaque = NO; self.tableView.backgroundColor = [UIColor clearColor]; UIView *backgroundView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)]; backgroundView.backgroundColor = [UIColor blueColor]; [self.tableView.window addSubview:backgroundView]; [backgroundView release]; I suspect that I am not positioning the backgroundView view in the right place. I have tried sendToBack:, bringToFront:, and others but I always just get a white background. Is it possible to do this from within the UITableViewController? Must I use Interface Builder?

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• Completion block not being called. How to check validity?

  - by HCHogan

  I have this method which takes a block, but that block isn't always called. See the method: - (void)updateWithCompletion:(void (^)(void))completion { [MYObject myMethodWithCompletion:^(NSArray *array, NSError *error) { if (error) { NSLog(@"%s, ERROR not nil", __FUNCTION__); completion(); return; } NSLog(@"%s, calling completion %d", __FUNCTION__, &completion); completion(); NSLog(@"%s, finished completion", __FUNCTION__); }]; } I have some more NSLogs inside completion. Sometimes this program counter just blows right past the call to completion() in the code above. I don't see why this would be as the calling code always passes a literal block of code as input. If you're curious of the output of the line containing the addressof operator, it's always something different, but never 0 or nil. What would cause completion not to be executed?

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• Modbus driver: C vs Java

  - by cpf

  Hi stackoverflow, I am soon going to start a project where I'm required to program a Modbus driver. My initial approach was to want to do it in Java, however my boss has had contact with a company that has experience in Modbus, and they said C is the better language to approach Modbus. So my boss pretty much demanded it to be in C. My C knowledge is not really big, so it would require me to learn enough to get the Modbus driver working in proper and stable order. So, my question to you stackoverflow people with some experience in Modbus: how important could the choice of C vs Java be? The modbus site seems to have Java libraries, if C was so superior to Java in every way, why would they have those libraries? Would it be useful to learn C properly for the advantages that might give?

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• Does the order of readonly variable declarations guarantee the order in which the values are set?

  - by Jason Down

  Say I were to have a few readonly variables for filepaths, would I be able to guarantee the order in which the values are assigned based on the order of declaration? e.g. readonly string basepath = @"my\base\directory\location"; readonly string subpath1 = basepath + @"\abc\def"; readonly string subpath2 = basepath + @"\ghi\klm"; Is this a safe approach or is it possible that basepath may still be the default value for a string at the time subpath1 and subpath2 make a reference to the string? I realize I could probably guarantee the order by assigning the values in a constructor instead of at the time of declaration. However, I believe this approach wouldn't be possible if I needed to declare the variables inside of a static class (e.g. Program.cs for a console application, which has a static void Main() procedure instead of a constructor).

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• Need to determine if ELMAH is logging an unhandled exception or one raised by ErrorSignal.Raise()

  - by Ronnie Overby

  I am using the Elmah Logged event in my Global.asax file to transfer users to a feedback form when an unhandled exception occurs. Sometimes I log other handled exceptions. For example: ErrorSignal.FromCurrentContext().Raise(new System.ApplicationException("Program code not found: " + Student.MostRecentApplication.ProgramCode)); // more code that should execute after logging this exception The problem I am having is that the Logged event gets fired for both unhandled and these handled, raised exceptions. Is there a way to determine, in the Logged event handler, whether the exception was raised via ErrorSignal class or was simply unhandled? Are there other Elmah events that I can take advantage of?

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• What is the appropriate terminology in Java when building remote proxies?

  - by Uri

  Suppose that I am implementing a remote proxy in Java to an object that is likely to reside on a remote server but may reside locally. There's my real object on the remote server, there's the local implementation (the proxy itself), and there's the interface I provide to my program which hides the details of where the object actually is. The local representation may contact a local or a remote implementation of the object. What is the standard terminology in Java for these things? What should I name my interfaces/classes? I've seen the terms Subjects, Images, and Implementations thrown around (probably from the GOF days), but I wonder what is acceptable way to do the naming for a framework written in Java.

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• Chipmunk warning still present with --release

  - by Kaliber64

  I'm using Python27 on Windows 7 64-bit. I downloaded the source for Chipmunk 6.2.x and compiled Pymunk with --release and -c ming32. Almost zero problems. Lots of path not found cause I'm bad. All prints seem to have disappeared but I get spammed with EPA iteration warnings. I've seen a couple discussions but no solutions. Possible chipmunk betas to fix the float errors causing the double truths causing the warning. I picked the latest stable version I think. My program is seriously bogged down with all the prints. class NullDevice(): def write(self, s): pass sys.stdout=NullDevice() Does not disable the C prints .< Any help?

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• Skinning WinAPI Controls

  - by Brad

  If you've ever seen an application in the Adobe Creative Suite 5 (CS5), you may have noticed that it doesn't look like the native Windows GUI.. They have modified it to have a different look to it. Where would someone begin to make an application that has a custom skin? CS5 uses the Adobe Source library for it's widget/control management, so I tried downloading and compiling the Adobe Source Library to see if I could make a nice skinned app like Photoshop CS5, but after finally getting it to compile and tested it, I realized the library was only for managing widgets and not skinning the GUI, like CS5 has. Where would I begin to make a nice skinned program like Adobe Cs5 applications? Can anyone point me in the right direction? Do I simply use the WM_PAINT Message from WinAPI and render my own widgets using openGL or something?

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• Cocoa app not launching on build & go but launching manually

  - by Matt S.

  I have quite the interesting problem. Yesterday my program worked perfectly, but now today I'm getting exc_bad_access when I hit build and go, but if I launch the app from the build folder it launches perfectly and there seems to be nothing wrong. The last bunch of lines from the debugger are: #0 0xffff07c2 in __memcpy #1 0x969f7961 in CFStringGetBytes #2 0x96a491b9 in CFStringCreateMutableCopy #3 0x991270cc in -[NSCFString mutableCopyWithZone:] #4 0x96a5572a in -[NSObject(NSObject) mutableCopy] #5 0x9913e6c7 in -[NSString stringByReplacingOccurrencesOfString:withString:options:range:] #6 0x9913e62f in -[NSString stringByReplacingOccurrencesOfString:withString:] #7 0x99181ad0 in -[NSScanner(NSDecimalNumberScanning) scanDecimal:] #8 0x991ce038 in -[NSDecimalNumberPlaceholder initWithString:locale:] #9 0x991cde75 in -[NSDecimalNumberPlaceholder initWithString:] #10 0x991ce44a in +[NSDecimalNumber decimalNumberWithString:] Why did my app work perfectly yesterday but not today?

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• how to get obj2.name via obj1.categories(), thanks (gae python)

  - by zjm1126

  i using google-app-engine webapp ,code is : class Post(db.Model): title = db.StringProperty(required=True) def categories(self): return (x.category for x in self.postcategory_set) class Category(db.Model): name = db.StringProperty() class PostCategory(db.Model): post = db.ReferenceProperty(Post) category = db.ReferenceProperty(Category) class sss(webapp.RequestHandler): def get(self): obj1 = Post(title='hhaa') #obj1.title = 'haha' obj1.put() obj2 = Category() obj2.name='haha-kao' obj2.put() obj3=PostCategory() obj3.post=obj1 obj3.category=obj2 obj3.put() self.response.out.write(obj1.categories().get().name) the error is : Traceback (most recent call last): File "D:\Program Files\Google\google_appengine\google\appengine\ext\webapp\__init__.py", line 511, in __call__ handler.get(*groups) File "D:\zjm_code\helloworld\a.py", line 131, in get self.response.out.write(obj1.categories().get().name) AttributeError: 'generator' object has no attribute 'get' so how to get the obj2.name via obj1's method thanks

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• How can I save an NSDocument concurrently?

  - by Paperflyer

  I have a document based application. Saving the document can take a few seconds, so I want to enable the user to continue using the program while it saves the document in the background. Due to the document architecture, my application is asked to save to a temporary location and that temporary file is then copied over the old file. However, this means that I can not just run my file saving code in the background and return way before it is done, since the temporary file has to be written completely before it can be copied. Is there a way to disable this temporary-file-behavior or otherwise enable file saving in the background?

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• How do I find/make programming friends?

  - by Anton

  I recently got my first programming internship and was extremely excited to finally be able to talk with and interact with fellow programmers. I had this assumption that I would find a bunch of like minded individuals who enjoyed programming and other aspects of geek culture. Unfortunately, I find myself working with normal people who program for a living and never discuss or show interest in programming outside of their work. It is incredibly disappointing, because I do think one of the best ways to progress in life and as a programmer is to talk about what you enjoy with others and to build bonds with people who enjoy similar things. So how do I go about finding/making programmer friends?

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• Delete link to file without clearing readonly bit

  - by Joshua

  I have a set of files with multiple links to them. The files are owned by TFS source control but other links to them are made to them. How do I delete the additional links without clearing the readonly bit. It's safe to assume: The files have more than one link to them You are not deleting the name owned by TFS There are no potential race conditions You have ACL full control for the files The machine will not lose power, nor will your program be killed unless it takes way too long. It's not safe to assume: The readonly bit is set (don't set it if its not) You can leave the readonly bit clear if you encounter an error and it was initially set Do not migrate to superuser -- if migrated there the answer is impossible because no standard tool can do this.

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• Set window to stays always on desktop on windows7

  - by Nuno

  Hi, I'm trying to set my window a child of the desktop, and i'm doing this like this: HWND ProgmanHwnd = ::FindWindowEx( ::FindWindowEx( ::FindWindow(L"Progman", L"Program Manager"), NULL, L"SHELLDLL_DefView", L""), NULL, L"SysListView32", L"FolderView"); SetParent(m_hWnd, ProgmanHwnd); This works fine in windowsXP, my window is underneath all windows and when i press the "show desktop" option the window shows and all other "normal" windows are hide. But in Win7 when i do the above code the same window is not displayed, in spy++ i can see that my window is a child window of the SysListView32 but it not display (and it has the WM_VISIBLE style)? What i'm missing? or what changed from winXP to win7? how can i do this to work on win7? Update: It's got something to do with aero theme, because if i change the desktop theme to the basic then the window is displayed, but if i switch back to one of the aero theme then is hided again. Thanks

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• Whats the scope of a c function defined within objective-c class?

  - by roja

  I was reading up about bypassing objective-c's messaging to gain performance (irrelevant to this specific question) when i found an interesting bit of code: #import <Cocoa/Cocoa.h> @interface Fib : NSObject { } - (long long) cFib: (NSUInteger) number; @end @implementation Fib // c implementation of fib long long cFibIMP(NSUInteger number) { return (number < 3) ? 1 : cFib(number - 1) + cFib(number - 2); } // method wrapper for c implementation of fib - (long long) cFib: (NSUInteger) number { return cFibIMP(number); } @end My question is; when using c function, within an objective-c object, what scope is the c function (cFibIMP in this particular case) placed in? Does the objective-c class encapsulate the c function removing change of name-clash or is the c function simply dumped into the global scope of the whole objective-c program?

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• Self updating application install with WIX?

  - by Brian ONeil

  I am writing an application that needs to be installed on a large number of desktops and also needs to update itself. We are looking at WIX for creating the installation. I have used ClickOnce and it is not a good solution for this install. WIX seems to fit, but there is no good process for auto update that I have found. I have looked at ClickThrough, but it doesn't seem ready for prime time yet. Does anyone have another good solution to use with WIX (or maybe another install program) to auto update an application install?

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• Tool(s) to lower the friction of programming against Interfaces in Visual Studio C#?

  - by John

  Hi I am a relatively new user of Visual Studio and I am trying "program against interfaces". I can see that when I create a class I can "Extract Interface" from the Refactor menu but you seem to only get one shot at this. ie. If I add a read only property FullName to my Customer class I would like to be able to right click and update the interface. At the moment I can only create a new interface from the Refactor menu. I want to update the interface I have already created not create new one. So the kind of tool I would be looking for would display check boxes for all valid members of the class with those already in the interface checked. It would also be handy to be able to to create the initial interface file in a different project (in the same solution), and for the tool to keep track of this. Does such a tool / add in / menu item exist (other than Ctrl C / V)? Thanks, John

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• Python os.path.join

  - by Jim

  Hello, I am trying to learn python and am making a program that will output a script. I want to use os.path.join but am pretty confused (I know I am very bad at scripting/programming) See, according to the docs ( http://docs.python.org/library/os.path.html ) if I say os.path.join('c:', 'sourcedir') I get C:sourcedir as it's output. According to the docs, this is normal (right?) But when I use the copytree command, Python will output it the desired way, for example import shutil src = os.path.join('c:', 'src') dst = os.path.join('c':', 'dst') shutil.copytree(src, dst) Here is the error code I get WindowsError: [Error 3] The system cannot find the path specified: 'C:src/.' If I wrap the os.path.join with os.path.normpath I get the same error If this os.path.join can't be used this way, then I am confused as to its purpose According to the pages suggested by Stack Overflow, slashes should not be used in join--that is correct I assume? Thanks guys(girls) for your help

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