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  • String on a model

    - by alecnash
    I am trying to put a sting on a Model and I want it to be dynamic. Did some research and came up with drawing the text on the texture and then set it on the model. I use something like this: public static Texture2D SpriteFontTextToTexture(SpriteFont font, string text, Color backgroundColor, Color textColor) { Size = font.MeasureString(text); RenderTarget2D renderTarget = new RenderTarget2D(GraphicsDevice, (int)Size.X, (int)Size.Y); GraphicsDevice.SetRenderTarget(renderTarget); GraphicsDevice.Clear(Color.Transparent); Spritbatch.Begin(); //have to redo the ColorTexture Spritbatch.Draw(ColorTexture.Create(GraphicsDevice, 1024, 1024, backgroundColor), Vector2.Zero, Color.White); Spritbatch.DrawString(font, text, Vector2.Zero, textColor); Spritbatch.End(); GraphicsDevice.SetRenderTarget(null); return renderTarget; } When I was working with primitives and not models everything worked fine because I set the texture exactly where I wanted but with the model (RoundedRect 3d button) it looks like that: Is there a way to have the text centered only on one side?

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  • Is there a Windows equivalent for eventfd?

    - by Leaurus
    I am writing a cross-platform library which emulates sockets behaviour, having additional functionality in the between (App-mylib-sockets). I want it to be the most transparent possible for the programmer, so primitives like select and poll must work with accordingly with this lib. The problem is when data becomes available (for instance) in the real socket, it will have to go through a lot of processing, so if select points to the real socket fd, app will be blocked a lot of time. I want the select/poll to unblock only when data is ready to be consumed (after my lib has done all the processing). So I came across this eventfd which allows me to do exactly what I want, i.e. to manipule select/poll behaviour on a given fd. Since I am much more familiarized with Linux environment, I don't know what is the windows equivalent of eventfd. Tried to search but got no luck. Anyone can help me, please?

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  • MouseLeave event in Silverlight 3 PopUp control

    - by AKa
    I want use PopUp (System.Windows.Controls.Primitives.PopUp) control to show some context menu. After mouse leaves, should automatically close. But eventhandler for MouseLeave is never executed. Why? SAMPLE: void DocumentLibrary_Loaded(object sender, RoutedEventArgs e) { DocumentLibraryDialog documentLibraryDialog = new DocumentLibraryDialog(); _popUpDocumentLibraryDialog = new Popup(); _popUpDocumentLibraryDialog.Width = 70; _popUpDocumentLibraryDialog.Height = 20; _popUpDocumentLibraryDialog.MouseLeave += new MouseEventHandler(_popUpDocumentLibraryDialog_MouseLeave); _popUpDocumentLibraryDialog.Child = documentLibraryDialog; } void _popUpDocumentLibraryDialog_MouseLeave(object sender, MouseEventArgs e) { Popup currentPopUp = (Popup)sender; if (currentPopUp.IsOpen) (currentPopUp.IsOpen) = false; } Regards Anton Kalcik

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  • DRY for JMeter tests

    - by jens
    Is there a way to modularize JMeter tests. I have recorded several use cases for our application. Each of them is in a separate thread group in the same test plan. To control the workflow I wrote some primitives (e.g. postprocessor elements) that are used in many of these thread groups. Is there a way not to copy these elements into each thread group but to use some kind of referencing within the same test plan? What would also be helpful is a way to reference elements from a different file. Does anybody have any solutions or workarounds. I guess I am not the only one trying to follow the DRY principle...

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  • Spinlocks, How Much Useful Are They?

    - by unknown
    How often do you find yourself actually using spinlocks in your code? How common is it to come across a situation where using a busy loop actually outperforms the usage of locks? Personally, when I write some sort of code that requires thread safety, I tend to benchmark it with different synchronization primitives, and as far as it goes, it seems like using locks gives better performance than using spinlocks. No matter for how little time I actually hold the lock, the amount of contention I receive when using spinlocks is far greater than the amount I get from using locks (of course, I run my tests on a multiprocessor machine). I realize that it's more likely to come across a spinlock in "low-level" code, but I'm interested to know whether you find it useful in even a more high-level kind of programming?

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  • Should primitive types or non-primitive types be preferred in Java interfaces?

    - by Greg Mattes
    (I thought I once read something about this in a book, but now I'm not sure where to find it. If this question reminds you of some material that you've read, please post a reference!) What are the pros and the cons of primitives in interfaces? In other words, is one of these preferable to the other and why? Perhaps one is preferable to the other in certain contexts? public interface Foo { int getBar(); } or public interface Foo { Integer getBar(); } Similarly: public interface Boz { void someOperation(int parameter); } or public interface Boz { void someOperation(Integer parameter); } Obviously there's the issue of having to deal with nulls in the non-primitive case, but are there deeper concerns?

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  • Convert methods from Java-actionscript to ObjectiveC

    - by eco_bach
    Hi I'm tring to convert the following 3 methods from java-actionscript to Objective C. Part of my confusion I think is not knowing what Number types, primitives I should be using. ie in actionscript you have only Number, int, and uint. These are the 3 functions I am trying to convert public function normalize(value:Number, minimum:Number, maximum:Number):Number { return (value - minimum) / (maximum - minimum); } public function interpolate(normValue:Number, minimum:Number, maximum:Number):Number { return minimum + (maximum - minimum) * normValue; } public function map(value:Number, min1:Number, max1:Number, min2:Number, max2:Number):Number { return interpolate( normalize(value, min1, max1), min2, max2); } This is what I have so far -(float) normalize:(float*)value withMinimumValue:(float*)minimum withMaximumValue:(float*)maximum { return (value - minimum) / (maximum - minimum); } -(float) interpolate:(float*)normValue withMinimumValue:(float*)minimum withMaximumValue:(float*)maximum { return minimum + (maximum - minimum) * normValue; } -(float) map:(float*)value withMinimumValue1:(float*)min1 withMaximumValue1:(float*)max1 withMinimumValue2:(float*)min2 withMaximumValue2:(float*)max2 { return interpolate( normalize(value, min1, max1), min2, max2); }

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  • Returning an anonymous class that uses a final primitive. How does it work?

    - by Tim P
    Hi, I was wondering if someone could explain how the following code works: public interface Result { public int getCount(); public List<Thing> getThings(); } class SomeClass { ... public Result getThingResult() { final List<Thing> things = .. populated from something. final int count = 5; return new Result { @Override public int getCount() { return count; } @Override public List<Thing> getThings(); return things; } } } ... } Where do the primitive int , List reference and List instance get stored in memory? It can't be on the stack.. so where? Is there a difference between how references and primitives are handled in this situation? Thanks a bunch, Tim P.

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  • Adding button in Actionscript code : Using Flex Builder

    - by dta
    I created a new actionscript project using Flex Builder 3 and tried to run the following file. I get this error : Definitions: fl.controls:Button could not be found. All I want to do is, to add a button to the application. How could I do it? package { import PaperBase; import org.papervision3d.objects.primitives.Cone; import fl.controls.Button; import fl.controls.Label; import fl.events.ComponentEvent; public class cone1 extends PaperBase { public var cone:Cone = new Cone(); protected var sceneWidth:Number; protected var sceneHeight:Number; public function cone1() { sceneWidth = stage.stageWidth sceneHeight = stage.stageHeight; init(sceneWidth*0.5,sceneHeight*0.5);//position of the cone } override protected function init3d():void { cone.scale = 5; cone.pitch(-40) default_scene.addChild(cone); } override protected function processFrame():void { cone.yaw(1);//rotation speed } } }

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  • Functional languages targeting the LLVM

    - by Matthew
    Are there any languages that target the LLVM that: Are statically typed Use type inference Are functional (i.e. lambda expressions, closures, list primitives, list comprehensions, etc.) Have first class object-oriented features (inheritance, polymorphism, mixins, etc.) Have a sophisticated type system (generics, covariance and contravariance, etc.) Scala is all of these, but only targets the JVM. F# (and to some extent C#) is most if not all of these, but only targets .NET. What similar language targets the LLVM?

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  • Custom Date Format with jax-rs in apache cxf?

    - by Oscar Chan
    Hi, I have been googling to figure out how I can customize the Date format when I use jax-rs on apache CXF. I looked at the codes, and it seems that it only support primitives, enum and a special hack that assume the type associated with @ForumParam has a constructor with a single string parameter. This force me to use String instead of Date if I want to use ForumParam. it is kind of ugly. Is there a better way to do it? @POST @Path("/xxx") public String addPackage(@FormParam("startDate") Date startDate) { ... } Thanks

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  • Size of Objects in Java Heap w/ Regards to Methods

    - by Eric
    I know about primitives and objects living on the heap, but how does the number of methods effect heap size of the object? For example: public class A { int x; public getX() { return x; } } public class B { int x; public getX() { return x; } public getXString() { return String.valueOf(x); } public doMoreInterestingStuff() { return x * 42; } //etc } When instantiated, both objects live on the heap, both have memory allocated to their primitive x, but is B allocated more heap space due to having more method signatures? Or are those ONLY on the classLoader? In this example its trivial, but when there are 100,000+ of these objects in memory at any given time I imagine it could add up.

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  • Does to_json require parameters? what about within rails?

    - by Harry Wood
    Does to_json require parameters? what about within rails? I started getting the error "wrong number of arguments (0 for 1)" when doing myhash.to_json Unfortunately I'm not sure when this error started happening, but I guess it relates to some versions of either rails or the json gem. I suppose my code (in a rails controller) is using the ActiveSupport::JSON version of to_json, rather than the to_josn method supported by the json gem. ActiveSupport::JSON vs JSON In environment.rb I have RAILS_GEM_VERSION = '2.3.2' and also config.gem "json", :version=> '1.1.7' It's just a simple hash structure containing primitives which I want to convert in my controller, and it was working, but now I can't seem to run to_json without passing parameters.

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  • JNI: Passing multiple parameters in the function signature for GetMethodID

    - by Jary
    I am trying to execute a function in Java (from C) that has the following signature: public void execute(int x, int y, int action); My problem is to define the function signature in GetMethodID: env->GetMethodID(hostClass, "execute", "(I;I;I;)V"); The problem I ma getting is: W/dalvikvm( 1849): Bogus method descriptor: (I;I;I;)V W/dalvikvm( 1849): Bogus method descriptor: (I;I;I;)V D/dalvikvm( 1849): GetMethodID: method not found: Lcom/device/client/HostConnection;.execute:(I;I;I;)V I am not sure how to specify the method signature in GetMethodID (for 3 integers as parameters). I saw people use the ";" to separate parameters in other posts for the String and File class, but nothing with primitives like integer. What would be the correct way to do this please? Thank you.

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  • Prims vs Polys: what are the pros and cons of each?

    - by Richard Inglis
    I've noticed that most 3d gaming/rendering environments represent solids as a mesh of (usually triangular) 3d polygons. However some examples, such as Second Life, or PovRay use solids built from a set of 3d primitives (cube, sphere, cone, torus etc) on which various operations can be performed to create more complex shapes. So my question is: why choose one method over the other for representing 3d data? I can see there might be benefits for complex ray-tracing operations to be able to describe a surface as a single mathematical function (like PovRay does), but SL surely isn't attempting anything so ambitious with their rendering engine. Equally, I can imagine it might be more bandwidth-efficient to serve descriptions of generalised solids instead of arbitrary meshes, but is it really worth the downside that SL suffers from (ie modelling stuff is really hard, and usually the results are ugly) - was this just a bad decision made early in SL's development that they're now stuck with? Or is it an artefact of what's easiest to implement in OpenGL?

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  • C# How to create objects without class definitions?

    - by JL
    Is it possible to create objects at designtime without having to have hard coded class definitions, then populate properties with primitives or even strongly typed data types? This might sound confusing, so I will attempt to give you a use case scenario. Use case: You have an XML config file that could hold configuration values for connecting to various systems in an SOA application. In C# the XML file is read, but for each system the configuration properties are different (e.g: SQL might have a connection string, while SharePoint might need a username + password + domain + url, while yet an smtp server would need username + password + port + url) So instead of creating static classes as follows public class SharePointConfiguration or public class SQLConfiguration, then have each class with custom properties (this is cumbersome) or using a 1990's method, an arrayList or some named collection Is there not a more preferred way to achieve this? Taking advantage of new language features, that can still offer design time intellisense, which would make the code easier to maintain and less prone to error. Thanks

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  • WPF DataGrid: How to set content alignment of RowHeader to 'Center'

    - by Nike
    I use WPF DataGrid. I put a text value in RowHeader and want to set alignment of RowHeader content to 'Center'. I tried this: <toolkit:DataGrid.RowHeaderStyle> <Style TargetType="{x:Type toolkit:Primitives.DataGridRowHeader}"> <Setter Property="HorizontalAlignment" Value="Center"/> <Setter Property="HorizontalContentAlignment" Value="Center"/> </Style> </toolkit:DataGrid.RowHeaderStyle> but it doesn't work. Actually I think that there is TextBlock in RowHeader and I need to set its TextAlignment Property to Center. How can do it?

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  • ContextSwitchDeadlock Was Detected error in C#

    - by assassin
    Hi, I am running a C# application, and during run-time I get the following error: The CLR has been unable to transition from COM context 0x20e480 to COM context 0x20e5f0 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations. Can anyone please help me out with the problem here? Thanks a lot.

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  • Interview question: difference between object and object-oriented languages.

    - by Bar
    My friend was asked the following question: what's the difference between object language and object-oriented language? It's a little unintelligible question. What does term «object language» correspond to? Does that mean «pure» object-oriented language, like the Wikipedia article says: Languages called "pure" OO languages, because everything in them is treated consistently as an object, from primitives such as characters and punctuation, all the way up to whole classes, prototypes, blocks, modules, etc. They were designed specifically to facilitate, even enforce, OO methods. Examples: Smalltalk, Eiffel, Ruby, JADE, VB.NET.

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  • Designing entire webpages as SVG files

    - by user1311390
    Disclaimer I realize that given the absurdity of the title, this sounds like a troll. However, it's a genuine question. My background involves OpenGL / x86 assembly. I've recently started learning web programming. I really like SVG + CSS, and was wondering -- why do people not design entire webpages in SVG? Context SVG provides beautiful primitive: quadratic + cubic bezier curves; lines + filling -- all as vector graphics SVG provides text SVG provides affine transformations Questions Are there examples of people designing entire websites as a giant SVG file? If not, what the limitations? Are there performance hits when using SVG primitives as opposed to divs/tables?

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  • Overloading assignment operator in C#

    - by Carson Myers
    I know the = operator can't be overloaded, but there must be a way to do what I want here: I'm just creating classes to represent quantitative units, since I'm doing a bit of physics. Apparently I can't just inherit from a primitive, but I want my classes to behave exactly like primitives -- I just want them typed differently. So I'd be able to go, Velocity ms = 0; ms = 17.4; ms += 9.8; etc. I'm not sure how to do this. I figured I'd just write some classes like so: class Power { private Double Value { get; set; } //operator overloads for +, -, /, *, =, etc } But apparently I can't overload the assignment operator. Is there any way I can get this behavior?

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  • Partially parse C++ for a domain-specific language

    - by PierreBdR
    I would like to create a domain specific language as an augmented-C++ language. I will need mostly two types of contructs: Top-level constructs for specialized types or declarations In-code constructs, i.e. to add primitives to make functions calls or idiom easier The language will be used for scientific computing purposes, and will ultimately be translated into plain C++. C++ has been chosen as it seems to offer a good compromise between: ease of use, efficiency and availability of a wide range of libraries. A previous attempt using flex and bison failed due to the complexity of the C++ syntax. The existing parser can still fail on some constructs. So we want to start over, but on better bases. Do you know about similar projects? And if you attempted to do so, what tools would you use? What would be the main pitfalls? Would you have recommendations in term of syntax?

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  • Why do C# and Java require everything to be in a class?

    - by Javier Badia
    It seemed like this question should have been asked before, but searching found nothing. I've always wondered what's the point of making us put every bit of code inside a class or interface. I seem to remember that there were some advantages to requiring a main() function like C, but nothing for classes. Languages like Python are, in a way, even more object oriented than Java since they don't have primitives, but you can put code wherever you want. Is this some sort of "misinterpretation" of OOP? After all, you can write procedural code like you would in C and put it inside a class, but it won't be object oriented.

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  • Accessing primitive properties from objects stored in a NSDictionary

    - by ChrisS
    Apologies if this is a basic question, I am just starting with Objective-C and trying to wrap things around in my head! I have a simple class of the form: @interface Whatever : NSObject { int somePrimitive; SomeObject* someObject; } @property (nonatomic) int somePrimitive; @property (nonatomic, retain) SomeObject* someObject; The class is more involved that this, but this illustrates the purpose. When I store instances of this class in a NSMutableDictionary: Whatever *whatever = [[Whatever alloc] init]; whatever.somePrimitive = 1; whatever.someObject = ...; [myDictionary setObject:whatever forKey:@"someKey"]; and then try to retrieve the object later: Whatever *result = [myDictionary valueForKey:@"someKey"]; then, result.someObject is ok to reference but, result.somePrimitive crashes. Does the NSDictionary not copy over the primitives of the object? Is the rule that the object stored in a dictionary should only contain objects?

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  • Silverlight Cream for December 29, 2010 -- #1018

    - by Dave Campbell
    In this Issue: Arik Poznanski, Derik Whittaker(-2-), Alex Knight, Maurice de Beijer, Jesse Liberty, Jason Ginchereau, Jeff Blankenburg, Mike Snow, and Peter Kuhn. Above the Fold: Silverlight: "Silverlight: Reading from a File Contained in your XAP" Mike Snow WP7: "A ReorderListBox for Windows Phone 7" Jason Ginchereau Expression Blend: "PathListBox: making rockin' animations" Alex Knight From SilverlightCream.com: Order in Chaos: Dependency Property Value Resolution Arik Poznanski sent me the link to his blog with this Dependency property value resolution post which demonstrates in successive detail xaml for each of the scenarios. Closing the Virtual Keyboard (SIP) and forcing binding in WP7 Derik Whittaker has a couple new posts up... this first is about how to close the SIP and forcing binding in a WP7 app... if you've run many WP7 apps I'm sure you understand the issue. Help my Slider control does not work inside a Grid in WP7 In Derik Whittaker's next post he details a problem he had with a Slider in a Grid that went AWOL... and how he resolved it.. also is asking why the solution works. PathListBox: making rockin' animations Holy Crap ... Alex Knight has his second PathListBox tutorial up and just stop reading and go check it out... dang! ... I'll still be here when you come back! Windows Phone 7, Animations and Data Binding Maurice de Beijer details an interesting problem he ran into where his databinding was hampering a page animation, what the root problem was and how he resolved it.. good information. Windows Phone From Scratch – Navigation Jesse Liberty has the next episode in the Windows Phone from Scratch series up and is talking about Navigation... he demos an ap with 3 pages and simple navigation this time. A ReorderListBox for Windows Phone 7 Found in Jeff Blankenburg's number 11, this post by Jason Ginchereau is a description of a Drag/Drop reodering ListBox drop-in for WP7 ... very cool, and source is on the post. What I Learned In WP7 – #Issue 11 Jeff Blankenburg's number 11 is a couple links itself... one to Jeff Wilcox for Silverlight UnitTest Framework, and one to Jason Ginchereau for Listbox Drag/Drop reordering... going to have to look that one up. Silverlight: Reading from a File Contained in your XAP Mike Snow's latest is on how to load up an extraneous file into your xap for loading at run-time and how to get that to actually work. XNA: Sophisticated primitives Peter Kuhn has a post up on using the XNA PrimitiveBatch class... he had trouble with it at first, and explains how to use it. XNA you say? ... think WP7. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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