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• Identifying connected lines drawn free-hand by a user

  - by rawrgoesthelion

  I have a series of 'images' described by a mixture of connected lines and curves. Users will draw on the screen, free hand, and my goal is to break their drawing down into a series of lines and curves that can be matched with the 'images' in my set. For the sake of simplicity, let's assume this is occurring on a touch screen. These lines will be connected. Each time the user's finger moves, the dx and dy is recorded. The drawing is considered complete and analyzed when the user's finger leaves the screen. I'm having trouble figuring out a good way to break the user's drawing down into lines. Is there any well known approach to this problem, a C++ library that solves it, or any good articles/technical papers on how to achieve this?

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• shotwell does not copy, but import them without copying

  - by user65764

  I tryed to import photos from my external harddisk into shotwell. After doing this, I disconected the harddisk and the photos disapeared immediately. I saw that the photos had been importet into the database without being copied. Copying the whole file into the picturefile is possible, but I would like to have to same fileorder in my library. Not a mixed up (organised by date (shotwell) and organised by filenames (my old organisation). It has not been any problem copying photos from a dvd. Is there any possibility to have the same filestructure for all fotos or is there a bug in shotwell? Thanks

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• Adding multiplayer to an HTML5 game

  - by espais

  I am interested in making a game that I currently have a co-op experience, however I'm curious as to the best method of implementing this in HTML5. I have made games before using straight C sockets, and also with the Net library for SDL. What are some of my best options for doing this in a canvas-based environment? At present, all I can come up with are either AJAX/database solutions (with a high refresh rate), or somehow implementing a PHP server that would funnel the data through sockets. The overall gameplay would be a 2.5D platformer-ish type of game, so both clients would need to be continually updated with player positions, enemy positions, projectiles, environmental data, etc.

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• Is this a pattern? Proxy/delegation of interface to existing concrete implementation

  - by Ian Newson

  I occasionally write code like this when I want to replace small parts of an existing implementation: public interface IFoo { void Bar(); } public class Foo : IFoo { public void Bar() { } } public class ProxyFoo : IFoo { private IFoo _Implementation; public ProxyFoo(IFoo implementation) { this._Implementation = implementation; } #region IFoo Members public void Bar() { this._Implementation.Bar(); } #endregion } This is a much smaller example than the real life cases in which I've used this pattern, but if implementing an existing interface or abstract class would require lots of code, most of which is already written, but I need to change a small part of the behaviour, then I will use this pattern. Is this a pattern or an anti pattern? If so, does it have a name and are there any well known pros and cons to this approach? Is there a better way to achieve the same result? Rewriting the interfaces and/or the concrete implementation is not normally an option as it will be provided by a third party library.

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• Writing long line support for text editor

  - by Mathematician82

  I know that some some text editors have problems to show long lines https://bugzilla.gnome.org/show_bug.cgi?id=172099 . What is the best way to fix the bug or are they equally well? Modify the GTK+ source code and add a support for long lines. Modify the text editor source code such that it does not use GTK+ if it meets a long line. Split the long lines into part (maybe by cut on the Bash ) I'm just a junior programmer so I don't know what people does when they meet a bug that is on the library they use.

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• Is there a program to manage movies and TV shows that supports mp4 tags?

  - by root45

  I'm looking for a media manager that will display and play movies and TV shows and will read data included in mp4 and m4v files. So far I've looked at XBMC, Moovida and Boxee and all of these seem to keep their own separate database or XML files for reading and storing tag information. I also looked at Banshee because of this answer, but it didn't read my tags. Banshee is also geared towards music videos instead of actual movies and TV shows. So I'm looking for software that Displays and plays movies and TV Shows Reads mp4 and m4v tags Preferably something with bulk import (i.e., I don't want to add 1,000 items to a new library) Bonus if it also has a tag editor Bonus if it's an XBMC extension

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• After power manager reinstall

  - by tuxi

  I had checking battery state hanging I solved it with the help of an answer from this site: sudo apt-get --reinstall install gnome-power-manager But now my left windows bar is rigid, it does not disappear on wide screen. EDIT Also in most of applications, characters are white. What could be the problem? and what should I do? 2ND EDIT My ubuntu is 12.04 LTS. I was trying to install some packages for dependencies of allegro game development library, one of the packages was libwxgtk2.8-0, after that a red cross appeared near user name and clock. Then computer became frozen and i had to remove my battery. I know it is a very bad thing. Then when i try to restart my computer, it could not start, it was waiting on black screen with line: Checking battery state... Then i run the above command. Computer could start but characters are white.

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• Experience embedding javascript

  - by deft_code

  I'm looking into scripting languages to embed in my game. I've always assumed Lua was the best choice, but I've read some recent news about embedding V8 as was considering using it instead. My question is two fold: Does anyone with experience embedding v8 (or another javascript engine) recommend it? How does it compare with embedding Lua? I like that v8 has a c++ embedding API. However Lua API has had lots of time to be refined (newer isn't always better and all that). Note: At this point I'm not too concerned with which is better language or which library has better performance. I'm only asking about ease of embedding.

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• How can I learn to write idiomatic C++?

  - by yati sagade

  I am a computer science student, and as a result, I was taught C++ as a better version of C with classes. I end up trying to reinvent the wheel whenever a solution to a complex problem is needed, only to find sometime after that, some language feature or some standard library routine could potentially have done that for me. I'm all comfortable with my char* and *(int*)(someVoidPointer) idioms, but recently, after making a (minor) contribution to an open-source project, I feel that is not how one's supposed to think when writing C++ code. It's much different than C is. Considering that I know objected-oriented programming fairly well, and I am okay with a steep learning curve, what would you suggest for me to get my mind on the C++ track when I'm coding C++?

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• HTTP resource bundling/streaming practice

  - by icelava

  Our SPA (plain HTML and Javascript) makes use of huge volume of javascript and other resources that are downloaded via XHR. Given the sheer number of components and browser simultaneous request limits, we're thinking for ways to deliver our resources in a more efficient manner. A method we're considering is bundling several resources that logically form a coherent group into a single file; thus reducing down to only one XHR (per group). Furthermore to make it more responsive, we'd like to constantly inspect the partial responseText during the LOADING state, determining if a usable chunk (atomic resource) has already been downloaded, and make it available for deserialization/processing even before the XHR is DONE. (a stream-like experience) We're thinking surely somebody else would've considered roughly the same approach before, but haven't really come across any library/framework or container file format that is suitable for our scenario. Anybody else know of something similar?

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• Looking for parallel programming problem

  - by Chris Lieb

  I am trying to come up with a problem that is easily solvable in a parallel manner and that requires communication between threads for a test. I also am trying to avoid problems that require require random waits, which rules out dining philosophers and producer-consumer (bounded buffer), two of the classics. My goal is for the student to be able to write the program in less than 20-30 minutes in front of a computer not knowing of the problem beforehand. (This is to prevent preparation more than to come up with something novel.) I am trying to stress the communication aspect of the program, though the multi-threaded nature is also important. Does anyone have some ideas? Edit: I'm using Google Go for the language and testing comprehension of the goroutines/channels combo vs an actors library that I authored.

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• Is there a standard for machine-readable descriptions of RESTful services?

  - by ecmendenhall

  I've interacted with a few RESTful APIs that provided excellent documentation for humans and descriptive URIs, but none of them seem to return machine-readable descriptions of themselves. It's not too tough to write methods of my own that assemble the right paths, and many language-specific API libraries are already just wrappers around RESTful requests. But the next level of abstraction seems really useful: a library that could read in an API's own machine readable documentation and generate the wrappers automatically, perhaps with a call to some standard URI like base_url + '/documentation' Are there any standards for machine-readable API documentation? Am I doing REST wrong? I am a relatively new programmer, but this seems like a good idea.

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• which Project hosting service (Like google code, github) you will prefer to use? And Why?

  - by MobileDev123

  I am using to study (and at some point of time copy the desired module of) the code from these two sites (Google Code and Github). There is sourceforge too, I have some code, say some library that I want to share with the community, and I am to decide the hosting site. And before I decide I want to have opinions from this community. Which is your favorite Project hosting site or service? And why? There is one point where github can win over google code (may be I am wrong here), Github can let you forge whole project with a zip or tar file, but to do the same in google code we have to upload the zip file explicitly and put it in downloads.... Thanks

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• Is it possible to modify a video codec + distribute it?

  - by Nick

  this is my first question on this particular stackexchange node, not sure if it's the most appropriate place for this question (if not, guidance to the appropriate node would be appreciated). the abstract: I'm interested in modifying existing video codecs and distributing my modded codecs in such a way as to make them easily added to a users codec library... for example to be added to their mpeg streamclip, ffmpeg etc. some details: I've had some experience modifying codecs by hacking ffmpeg source files and compiling my hacked code (so that for ex: my version of ffmpeg has a very different h.263 than yours). I'm interested now in taking these modified codecs and somehow making them easily distributable, so others could "add them" to their "libraries." Also, I realize there are some tricky rights/patent issues here, this is in part my motivation. I'm interested in the patent quagmires, and welcome any thoughts on this as well. ctx link: if it helps (to gauge where I'm coming from) here's a link to a previous codec-hacking project of mine http://nickbriz.com/glitchcodectutorial/

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• Free Windows 8 book on programming with html, css and javascript

  - by Dave Noderer

  Just a heads up from DevFish (http://devfish.net), a free book on writing applications for Windows 8using html, css and javascript by Kraig Brockschmidt . You can find the book here: http://blogs.msdn.com/b/microsoft_press/archive/2012/10/29/free-ebook-programming-windows-8-apps-with-html-css-and-javascript.aspx I have not finished reading this but so far it looks like it will be a great resource if you have any interest in trying the windows 8 javascript programming model. Besides all the aspects of controls, library support and animations the book also talks about how to make your own components in c#, vb or c++.

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• Which license can I use for my open source AWS project [closed]

  - by mafue

  I'm creating a project on codeplex that uses Amazon Web Services and the AWS SDK for .NET Which licenses can I use? The SDK is released under Apache 2.0 license, so I assume my project can or should use the same. If I add another open source library released under a different license, do I need to find a license that is 'compatible' with both ie. one that has the same requirements for derivative works? My requirement is for a license that allows me to publish a derivative work from the AWS .NET SDK. I can use any of the licenses that codeplex supports, which includes: Apache 2.0 GNU GPLv2 MIT Mozilla Public License 2.0 Microsoft Public License

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• Is there any map maker for javaME game?

  - by user1494517

  For the past two weeks I was trying to make a map maker for my java ME 2D RPG game. I failed because i get errors using slick TWL and the forum for this is inactive. So I just wondered is there anyone that knows slick TWL (Themable Widget Library)? Or maybe do you know a good MapMaker where i could upload my map elements build a map and get numbers to use them for building map with LayerManager class? Already found one http://sourceforge.net/projects/tilemapeditor2d/. But the thing is my map elements are in different .png images. In one of those images there is 16 elements (trees water and etc) and those kind of images are 29. So it would be hard to build a map with LayerManager Well I was thinking putting everything into one image and that way it would be simplier.

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• Any pre-rolled System.IO abstraction libraries out there for Unit Testing?

  - by Binary Worrier

  To test methods that use the file system we need to basically put System.IO behind a set of interfaces that we can then mock, I do this with a DiskIO class and interface. As my DiskIO code gets larger (and the grumblings from the we're unconvinced about this TDD thing crowd here in work get louder), I went looking for a comprehensive open source library that already does this and found . . . nothing. I may be looking in the wrong place or have approached this problem in completely the wrong way. I can't be the only idiot in this position, do these libraries exist, if so where are they? Any you've used and would recommend? Thanks P.S. I'm happy with my current approach i.e. starting with what we need, and adding only when the need arises. Unfortunately the we're unconvinced about this TDD thing crowd remain unconvinced, and think that I can't be right.

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• Settings object with singleton pattern

  - by axis

  I need to build an object that will have only one instance because this Object is dedicated to the storage of vital settings for my application and I would like to avoid a misuse of this type or a conflict at run-time. The most popular solution for this, according to the internet, is the Singleton pattern. But I would like to know about other ideas or solutions for this; also I would like to know if other solutions can be much more easy to grasp for an user of this hypothetical library. Thanks.

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• Tricky mod_rewrite challenge

  - by And Finally

  I list about 9,000 records on my little site. At the moment I'm showing them with a dynamic page, like http://domain.com/records.php?id=019031 But I'd like to start using meaningful URLs like this one on Amazon http://www.amazon.co.uk/Library-Mythology-Oxford-Worlds-Classics/dp/0199536325 where the title string on the root level gets ignored and requests are redirected to the records.php page, which accepts the ID as usual. Does anybody know how I could achieve that with mod_rewrite? I'm wondering how I'd deal with requests to my other root-level pages, like http://domain.com/contact.php, that I don't want to redirect to the records page.

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• Are there any reliable solutions for annotations/reflection/code-metadata in C?

  - by dukeofgaming

  Not all languages support java-like annotations or C#-like attributes or code metadata in general, however that doesn't mean it is not possible to have in languages that don't have this. An example is PHP with Stubbles and the Doctrine annotation library. My question is, is there anything like this for C?, or are there any reliable ways of doing reflection with extended code metadata in C? Ideally, I'm looking for something that reads javadoc-like comments. Edit: The reason for me *needing* as opposed to just wanting, is that I need to generate C code and code-metadata from a database, as well as being able to edit that metadada and update the database. The volume of the work (~15,000 variables/structures/functions to generate from this database) justifies the solution.

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• How I improve my problem-solving ability

  - by gcc

  How we can improve our problem-solving ability ? Every one says same thing "real programmer knows how to handle real problem.", but they forget something how they take this ability, or where ( I know in school, no one gives us any ability, of course in my opinion. ) If you have any idea except above ones, feel free when you give an advice solve more problem do more exercise, write code, search google then write more ... For me, my question is like "Use complex/known library instead of using your own." In other words, I want your experience, book recommendation, web page

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• Is there any Ubuntu translation indicator?

  - by Oyibo

  For more precision: I'm runnning Ubuntu 12.04 I'd like an indicator which shows up to the left of the date/volume/wifi icons If possible I'd like to be able to change the translation language The indicator could use internet based translators (google translate etc.) or have a complete library come with it so translations can be obtained offline. Relating to usability: I'd like to have it work in a way where you click on the indicator icon and you can start typing either directly or once a window has opened and it instantly shows the translation you need (with your target languages pre-set or determined in options).

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• where can i learn to make 3d games in java from scratch?

  - by dfhgdfnhgfn

  Just wondering if anyone knows of anything i can read or watch that explains 3D graphics. i do not want to use any game engine like jogl etc. but i am looking for a way i can learn in detail how 3D works. preferably in java. I have used some game engines but would prefer to learn to make for myself. I would also like to do it without the java3d library. I have also watched some tutorials on 3d games in java, but would like to learn in more detail. Thanks.

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• Rendering only a part of text FTGL, OpenGL

  - by Mosquito

  I'm using FTGL library to render text in my C++ project. I can easily render text by using: CFontManager::Instance().renderWrappedText(font, lineLength, position, text); Unfortunately there is a situation in which this Button which displays text, is partly hidden because of resizing container in which it is situated. I'm able without any problem to draw Button's background to fit the container, but I've got a problem with doing the same with a text. Is it possible to somehow draw only text for given width and the rest just ignore? This is a screen which presents my problem: As you can see, the Button "Click here" is being drawn properly, but I can't do the same with "Click here" text.

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