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  • Orthographic Projection with variable FOV

    - by cubrman
    We are building agame with orthographic view. The problem we face is the fact that with different resolution you can see different area of the game world. E.g. if you have higher resolution you can see more around you. To solve this we currently use a common scale factor that every model is scaled by, depending on resolution. But this has drawbacks when drawing shadows - I cannot set a higher view angle for the orthographic shadow camera, while when using the perspective shadow camera I get significantly worse shadow quality. So the question is is there any way to controll FOV when using orthographic projection, or, more specifically, what is the easiest way to scale the world uniformly up or down with orthographic projection matrix? I saw that in 3ds MAX you can control FOV for an orthographic camera I wonder how they implemented it.

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  • Visual Studio 2010 Zooming Keyboard Commands, Global Zoom

    One of my favorite features in Visual Studio 2010 is zoom. It first caught my attention as a useful tool for screencasts and presentations, but after getting used to it Im finding that its really useful when Im developing letting me zoom out to see the big picture, then zoom in to concentrate on a few lines of code. Zooming without the scroll wheel The common way youll see this feature demonstrated is with the mouse wheel you hold down the control key and scroll up or down to change font size....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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  • How would you represent an object that can be of multiple types, when storing it as a document in MongoDB?

    - by blueberryfields
    Somewhat related to this question, say that I have an object category which, depending on which type of object I have, has different restrictions on what it contains. (if you can reword the previous sentence to make more sense I'd appreciate it) For example var SomeSchema = new Schema({ _id: ObjectID, [... large number of common fields ...] type: //Restricted somehow to members of a fixed array data: //depending on type, this might be restricted - sometimes an integer, sometimes array, etc... }); What's the idiosyncratic method for defining this type of schema? Is it appropriate to define a single schema, and handle the types inside of it's members, or am I better off with separate schema for each type?

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  • Does approaching SICP in clojure have a high chance of success? [on hold]

    - by ironicaldiction
    I am a third year bachelor student in a software engineering program, and I brought up the idea of reading SICP to an adviser to gain a deeper and more fundamental understanding of the principles behind all this software we engineer. He suggested not to learn scheme to complete the book (because it's not as common as modern dialects of lisp) but to do the exercises in clojure instead. My worry is that completing exercises in clojure instead of scheme will make an already difficult book tortuous. If I do attempt the book's exercises in the more modern clojure, will it be difficult to succeed (for example, because I can't find any real solutions, the syntax they teach for scheme is different, etc.), or do you think approaching the book in clojure could be just as successful as approaching it in scheme? I'm really not knowledgeable enough about either clojure or scheme to make an argument about this, so I wanted to know if I should bring it up or not.

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  • Declarative Transactions in Node.js

    - by James Kingsbery
    Back in the day, it was common to manage database transactions in Java by writing code that did it. Something like this: Transaction tx = session.startTransaction(); ... try { tx.commit(); } catch (SomeException e){ tx.rollback(); } at the beginning and end of every method. This had some obvious problems - it's redundant, hides the intent of what's happening, etc. So, along came annotation-driven transactions: @Transaction public SomeResultObj getResult(...){ ... } Is there any support for declarative transaction management in node.js?

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  • ISTQB terminology question (Defect)

    - by user970696
    According to ISTQB (and few more sources + wiki ), a defect/bug is the actual cause of error in software, e.g. incorrect statement, logical or semantic error. The actual definion is: a flaw in the system or component that could lead to the failure. But what about specification bugs? I cannot relate to it. Specification bugs are quite common but if the programmer implements software according to spec with a bug, it is not his fault (IMHO). But then the definion could not apply and I am sure it must have been addressed somehow. Could you help me to understand this?

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  • Clicking on clues and other objects in a 2D cluedo like game

    - by Anearion
    I'm a java/android programmer, but I don't have any experience in game programming, I'm already reading proper books, like "Pro Android Games", but my concerns are more about the ideas behind game programming than the techniques themselves. I'm working on a 2D game, something like Cluedo to let you understand the genre. I would like to know how should I act with the "scenes", for example, a room with a desk, TV, windows and a lamp. I need to make some items tappable and others not. Is it common to use one image (invisible to the user) with every different item a different color, then call the getColor() method on the image? Or use one image as background, and separate images for all the items? If the latter, how can I set the positioning? and should I use imageView or imageButton? I'm sorry if those are really low quality questions, but as "outsider" ( I'm 23 and still finishing my university ) it's pretty hard learn alone.

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  • How seriously would an employer take a job application from an applicant studying at the Open University [closed]

    - by user866190
    I ask the question because I am considering applying to a traditional bricks and mortar university to do mathematics, computer science or software engineering. However I am in my late twenties and have a young family so I am seriously considering going down the Open University route and working in the software development industry at the same time. If I do attend Open University, I will definitely study Mathematics. I fell in love with PHP and the common web technologies a few years back and it has slowly progressed into learning C++, Java and also Python. If I spent the next year increasing my knowledge of those languages whilst studying at the Open University, would an employee consider a self taught programmer who is 20% of the way through a Bsc in Mathematics?

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  • How to work with scenes in a 2D game

    - by Anearion
    I'm a java/android programmer, but I don't have any experience in game programming, I'm already reading proper books, like "Pro Android Games", but my concerns are more about the ideas behind game programming than the techniques themselves. I'm working on a 2D game, something like Cluedo to let you understand the genre. I would like to know how should I act with the "scenes", for example, a room with a desk, TV, windows and a lamp. I need to make some items tappable and others not. Is it common to use one image (invisible to the user) with every different item a different color, then call the getColor() method on the image? Or use one image as background, and separate images for all the items? If the latter, how can I set the positioning? and should I use imageView or imageButton? I'm sorry if those are really low quality questions, but as "outsider" ( I'm 23 and still finishing my university ) it's pretty hard learn alone.

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  • Database Change Auditing - Part of or Abstracted from ORM / Application Layer?

    - by BrandonV
    My fellow developers and I are at a crossroads in how to go about continuing our auditing of database changes. Most of our applications log changes via INSERT, UPDATE, and DELETE triggers. A few of our newer applications audit at the ORM layer; specifically using Hibernate Envers. While ORM layer auditing provides a much cleaner interface and is much more maintainable, it will not capture any manual database changes that are made. ORM layer auditing also means that our libraries will currently require a dependency on our ORM implementation unless, specifically in our case for example, JPA plans on providing something in the near future. Is there a common paradigm that addresses this?

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  • "A", "an", and "the" in method and function names: What's your take?

    - by Mike Spross
    I'm sure many of us have seen method names like this at one point or another: UploadTheFileToTheServerPlease CreateATemporaryFile WriteTheRecordToTheDatabase ResetTheSystemClock That is, method names that are also grammatically-correct English sentences, and include extra words purely to make them read like prose. Personally, I'm not a huge fan of such "literal" method names, and prefer to be succint, while still being as clear as possible. To me, words like "a", "an", and "the" just look plain awkward in method names, and it makes method names needlessly long without really adding anything useful. I would prefer the following method names for the previous examples: UploadFileToServer CreateTemporaryFile WriteOutRecord ResetSystemClock In my experience, this is far more common than the other approach of writing out the lengthier names, but I have seen both styles and was curious to see what other people's thoughts were on these two approaches. So, are you in the "method names that read like prose" camp or the "method names that say what I mean but read out loud like a bad foreign-language-to-English translation" camp?

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  • The Ultimate Nexus 7 Troubleshooting Guide: 6 Potential Problems and How to Fix Them

    - by Chris Hoffman
    Have you had any issues with your Nexus 7? We’ve run into quite a few problems and fixed them all – from bad performance and touch-screen responsiveness issues to tablets that won’t power on and separating screens. Some of these problems may not be common – or may be fixed with newer hardware or software updates — but they’re all problems we’ve run into. We’ve collected the solutions here so you don’t have to dig through forum posts. Secure Yourself by Using Two-Step Verification on These 16 Web Services How to Fix a Stuck Pixel on an LCD Monitor How to Factory Reset Your Android Phone or Tablet When It Won’t Boot

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  • using heightmap to simulate 3d in an isometric 2d game

    - by VaTTeRGeR
    I saw a video of an 2.5d engine that used heightmaps to do zbuffering. Is this hard to do? I have more or less no idea of Opengl(lwjgl) and that stuff. I could imagine, that you compare each pixel and its depthmap to the depthmap of the already drawn background to determine if it gets drawn or not. Are there any tutorials on how to do this, is this a common problem? It would already be awesome if somebody knows the names of the Opengl commands so that i can go through some general tutorials on that. greets! Great 2.5d engine with the needed effect, pls go to the last 30 seconds Edit, just realised, that my question wasn't quite clear expressed: How can i tell Opengl to compare the existing depthbuffer with an grayscale texure, to determine if a pixel should get drawn or not?

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  • php.ini modifications has no effect on joomla

    - by user488736
    I have a netbook with a recently installed ubuntu server 12.04 64-bit. I have (only) installed Joomla on it (version 2.5) and now I am trying to tweak the php.ini settings so I can install jomsocial onto joomla. I have changed these settings: upload_max_filesize = 2M post_max_size = 8M to this: upload_max_filesize = 20M post_max_size = 20M in all php.ini-files in my system. Thats six files, found using 'locate': /etc/php5/apache2/php.ini /etc/php5/cli/php.ini /usr/share/doc/php5-common/examples/php.ini-development /usr/share/php5/php.ini-production /usr/share/php5/php.ini-production-dist /usr/share/php5/php.ini-production.cli I have double-checked that these files actually contain the new settings. Still, joomla does not recognize the new settings, stating that upload_max_filesize is still only 2M and post_max_size is still only 8M The same is true after a complete restart of the server. What am I doing wrong here?

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  • OpenGL Vertex Attributes - Normalisation

    - by Daniel
    Alas, I have searched, and have found no definitive answer. When would you normalize the vertex data in OpenGL using the following command: glVertexAttribPointer(index, size, type, normalize, stride, pointer); I.e when would normalize == GL_TRUE; what situations, and why would you choose to let the GPU do the calculations instead of preprocessing it? All examples I have ever seen, have this set to GL_FALSE; and I cannot personally see a use for it. But Khronos aren't stupid, so it must be there for something useful (and probably common).

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  • What does the kernel boot parameter "set acpi_osi=Linux" do?

    - by AIB
    I am facing an issue with brightness control in my laptop which has Intel HD graphics. So when I searched for a fix I found that a common suggestion is to edit the GRUB file line, GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor" So could anyone tell me what the kernel boot option acpi_osi=Linux do? My OS is Ubuntu 10.10 64-bit version update The boot parameter acpi_osi is used as follows, acpi_osi= [HW,ACPI] Modify list of supported OS interface strings acpi_osi="string1" # add string1 -- only one string acpi_osi="!string2" # remove built-in string2 acpi_osi= # disable all strings But still I don't find a reason why this should fix any laptop issue!!

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  • Rules for Naming

    - by PointsToShare
    © 2011 By: Dov Trietsch. All rights reserved Naming Documents (or is it “Document, Naming”?) Tis but thy name that is my enemy; Thou art thyself, though not a Montague. What's Montague? It is nor hand, nor foot, Nor arm, nor face, nor any other part Belonging to a man. O, be some other name! What's in a name? That which we call a rose By any other name would smell as sweet; So Romeo would, were he not Romeo call'd, Retain that dear perfection which he owes Without that title. Romeo, doff thy name And for that name which is no part of thee Take all myself.  Shakespeare – Romeo and Juliet Act II, Scene 2 We normally only use the bold portion of the famous Shakespearean quote above, but it is really out of context. As the play unfolds, we learn that a name is all too powerful. Indeed it is because of their names that the doomed lovers die. There might be life and death in a name (BTW, when I wrote this monogram, I was in Hatfield, PA. Remember the Hatfields and the McCoys?) This is a bit extreme, but in the field of Knowledge Management (KM) names are of the utmost importance as well. When I write an article about managing SharePoint sites, how should I name it? “Managing a site” or “Site, managing”? Nine times out of ten I’d opt for the latter. Almost everything we do is “Managing” so to make life easier for a person looking for meaningful content, we title our articles starting with the differentiator rather than the common factor. As a rule of thumb, we start the name with the noun rather than the verb. It is not what we do that is the primary key; it is what we do it to. So, answer this – is it a “rule of thumb” or a “thumb rule?” This is tough. A lot of what we do when naming is a judgment call. Both thumb and rule are nouns, albeit concrete and abstract (more about this later), but to most people “thumb rule” is meaningless while “rule of thumb” is an idiom. The difference between knowledge and information is that knowledge is meaningful information placed in context. Thus I elect the “rule of thumb”. It is the more meaningful title. Abstract and Concrete are relative terms. Many nouns (and verbs) that are abstract to a commoner, are concrete to a practitioner of one profession or another and may even have different concrete meanings in different professional jargons. Think about “running”. To an executive it means running a business, to a marathoner its meaning is much more literal. Generally speaking, we store and disseminate knowledge within a practice more than we do it in general. Even dictionaries encyclopedias define terms as they apply to different audiences. The rule of thumb is to put the more concrete first, but within the audience’s jargon. Even the title of this monogram is a question. Do I name it “Naming Documents” or “Documents, Naming”? Well, my own rule of thumb (“Here he goes again!?”) states that the latter is better because it starts with a noun, but this is a document about naming more than it about documents. The rules of naming also apply to graphs and charts, excel spreadsheets, and so on. Thus, I vote for the former.  A better title could have been “Naming Objects” only the word “Object” is a bit too abstract. How about just “Naming” or “Naming, rules of”? You get the drift. One of the ways to resolve all of this is to store the documents in Knowledge-Bases, which may become the subjects of a future punditry. Knowledge bases use keywords to describe their content.  Use a Metadata store for the keywords to at least attempt some common grounds. Here is another general rule (rule of thumb?!!) – put at least the one keyword in the title. Use subtitles. Here is an example: Migrating documents – Screening, cleaning, and organizing our knowledge. The main keyword is “documents”, next is “migrating”, other keywords also appear in the subtitle. They are “screening”, “cleaning”, and “organizing”. Any questions? Send me an amply named document by email: [email protected]

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  • Display turns off when watching videos (then video starts to lag), how to fix it?

    - by Bad Learner
    Okay, here's the thing - - On my Ubuntu 11.10 64-bit installation, I have the display set to turn off automatically after 3 minutes of inactivity. There are two problems now: the display turns off even when I am watching videos. But I don't want to keep fiddling my mouse or keyboard when I am watching a movie. Okay, like I said above, the display turns off, then I move the mouse a bit each time, and the display turns back on. But now, the video doesn't play properly, it lags. A lot actually. Are these issues common? Can these be fixed?

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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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  • Caching strategies - LRU, MRU, Clock-Pro

    - by golgofa
    I am going to write a bachelor's science work on caching strategies and really, can't find any links to specifications or full descriptions of some of them. Only something like summaries from wikipedia. Please, help with some links on LRU, MRU caching and new-one - Clock Pro. Thanks a lot. All links are very useful for me. The purpose of work - is to compare different cache strategies to get more effiency. It based on WebApplication with ejb 2.0, so algorithm's will be implemented there, espesially in ejbLoad() and ejbFindByPrimarKey(). Also, one of aspects of this application - it will use not common scheme of tables in database - it based on metamodel. So, if you had any experience on this topic, i would be grateful to take some of your knowledge)

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  • Use a GUI designer or write it yourself for the desktop?

    - by TheLQ
    Writing a GUI for a program has always been a daunting, depressing, and frustrating task. It doesn't matter which language, its extremely hard to get what I want. Especially in compiled languages like Java where a change takes a minute or two to build. The result is that I increasingly use GUI designers for some of my project. Sure their is some spagetti code, but as long as I leave the configuration and a note saying "This was designed with X" I have no qualms with doing this. Is this an okay way to design a GUI? More importantly, is this what most people do? Or is the common way to just sit down and write it out?

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  • How do I get "ruby" to do what "ruby1.9.1" does?

    - by Daniel
    I want to start off by saying... I really don't need to be using 1.9.2. I understand that you don't ever, ever use Python 3.2, so if the common advice is that I should use 1.8, I'll do that. But don't tell me to do that because it's easier. Whatever version I should be using, though, the question is still relevant: What's a good way to make one command do another command? (I suppose I could write a c program to launch ruby1.9.1, call the executable ruby, and put it in my bin, but this seems like less than a good idea)

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  • When Your ASP.NET MVC Custom Error Doesn't Render...

    You've put [HandleError] on your controller and you've set <customErrors mode="On"> in the web.config file. So why do you still see the yellow screen of death? I've heard various wrong explanations for this phenomena, including "it only works under IIS" and "it only works in release mode". But the custom error view does work in debug mode and it does work with the Visual Studio WebDev web server. I think the most common reason for the error view not to display is because the error view throws...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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  • In which directory to write game save files/data?

    - by Klaim
    I need a definite list of directories, one or more per platform, where to put game save files and other game generated data. Either based no the OS developer specification, or because it is common usage if there is no recommandation. Please provide one answer per platform, with different directories. Also, example of how to get the directory location in C++ or C is best, as it's the language you'll have more hard time. Locations: Player's game data (saved games, config). Shared game data (like high-score or config for all computer users). Temporary game data (aka cache directory).

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  • When Your ASP.NET MVC Custom Error Doesn't Render...

    You've put [HandleError] on your controller and you've set <customErrors mode="On"> in the web.config file. So why do you still see the yellow screen of death? I've heard various wrong explanations for this phenomena, including "it only works under IIS" and "it only works in release mode". But the custom error view does work in debug mode and it does work with the Visual Studio WebDev web server. I think the most common reason for the error view not to display is because the error view throws...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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