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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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• brackets in php templates

  - by Othman

  I have a script, and now it's the perfect time to have an option to change theme templates. I was looking forward to store these files in php files, or html files. with CSS file. I looked over some codes and I found that they use brackets to refer to the variable. Here's an example of a template block: <div class='block_div'> <center>{title}</center> {content} </div> I know that I can use PHP vars usering <?=$var;?>. However, I think the one above is better, and I looked over the web to find anything about it but I couldn't. My Question is how I can use these brackets in my php or html code. to let the user changing the template only not the code!

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• Manually updating HTML5 local storage?

  - by hustlerinc

  I'm just starting out HTML5 game developement (and game dev in general) and watching all the videos and tutorials available something has crossed my mind. Everyone keep saying I should set the cookie's (or cached files) to be expired after a certain amount of time. So that when it reaches that time the browser automatically downloads all assets again, even if it's the same asset's. Wouldn't it be possible to manually define the version of the game? For example the user has downloaded all the files for 1.01 of the game, when updating I change a simple variable to 1.02. When the user logs in it would compare his version to the current and if they are not equal only then it downloads the files? This could even be improved to download only specific files depending on what needs to be updated? Would this be possible or am I just dreaming? What are the possible downsides of this approach?

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• Box2D platformer movement. Should i mess with velocity?

  - by Romeo

  I have a platformer game in which I implemented the movement using a wheel attached to the hero. For jumping I use this: player.body.applyLinearImpulse(new Vec2(0, 30000000), player.body.getPosition()); The problem is that the xVelocity doesn't remain the same during the jump so it isn't looking natural. Is there any way to modify only the x velocity of the body so that before jumping I store it in a variable and after jumping I apply it to the body? I hope you understand what I am trying to say.

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• Error installing Package Control for Sublime Text 3 on Ubuntu 14.04

  - by user1837378

  This is the error. It comes up when I paste and enter the installation code (which I get from the Package Control website) and each time I open up Sublime Text. Package Control Your system's locale is set to a value that can not handle non-ASCII characters. Package Control can not properly work unless this is fixed. On Linux, please reference your distribution's docs for information on properly setting the LANG environmental variable. As a temporary work-around, you can launch Sublime Text from the terminal with: LANG=en_US.UTF-8 sublime_text I had the same problem with Ubuntu 13.04 so it's probably not version-dependent.

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• SQL Server 2008: Table Valued Parameters

  In SQL Server 2005 and earlier, it is not possible to pass a table variable as a parameter to a stored procedure. When multiple rows of data to SQL Server need to send multiple rows of data to SQL Server, developers either had to send one row at a time or come up with other workarounds to meet requirements. While a VB.Net developer recently informed me that there is a SQLBulkCopy object available in .Net to send multiple rows of data to SQL Server at once, the data still can not be passed to a stored proc.Possibly the most anticipated T-SQL feature of SQL Server 2008 is the new Table-Valued Parameters. This is the ability to easily pass a table to a stored procedure from T-SQL code or from an application as a parameter.

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• Nearest color algorithm using Hex Triplet

  - by Lijo

  Following page list colors with names http://en.wikipedia.org/wiki/List_of_colors. For example #5D8AA8 Hex Triplet is "Air Force Blue". This information will be stored in a databse table (tbl_Color (HexTriplet,ColorName)) in my system Suppose I created a color with #5D8AA7 Hex Triplet. I need to get the nearest color available in the tbl_Color table. The expected anaser is "#5D8AA8 - Air Force Blue". This is because #5D8AA8 is the nearest color for #5D8AA7. Do we have any algorithm for finding the nearest color? How to write it using C# / Java? REFERENCE http://stackoverflow.com/questions/5440051/algorithm-for-parsing-hex-into-color-family http://stackoverflow.com/questions/6130621/algorithm-for-finding-the-color-between-two-others-in-the-colorspace-of-painte Suggested Formula: Suggested by @user281377. Choose the color where the sum of those squared differences is minimal (Square(Red(source)-Red(target))) + (Square(Green(source)-Green(target))) +(Square(Blue(source)-Blue(target)))

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• When to use functional programming approach and when not? (in Java)

  - by john smith optional

  let's assume I have a task to create a Set of class names. To remove duplication of .getName() method calls for each class, I used org.apache.commons.collections.CollectionUtils and org.apache.commons.collections.Transformer as follows: Snippet 1: Set<String> myNames = new HashSet<String>(); CollectionUtils.collect( Arrays.<Class<?>>asList(My1.class, My2.class, My3.class, My4.class, My5.class), new Transformer() { public Object transform(Object o) { return ((Class<?>) o).getName(); } }, myNames); An alternative would be this code: Snippet 2: Collections.addAll(myNames, My1.class.getName(), My2.class.getName(), My3.class.getName(), My4.class.getName(), My5.class.getName()); So, when using functional programming approach is overhead and when it's not and why? Isn't my usage of functional programming approach in snippet 1 is an overhead and why?

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• How to I prevent decimal truncation in Word 2003 when a document is auto populated via a Web Service

  - by thomas.loughran

  I have a document template which is being auto populated via an external web service. The incoming data exists as a currency (e.g. 3.10) but when it is passed into the Word Document template the variable is truncated to remove any trailing 0's. I need the number to always appear with 2 decimals, even if they are both 0's. This is with the 2003 version of Word, I have not tested with other versions since all of our document templates need to be generated using that version of Word. I feel like this can be done with a Macro or a VB script but I have a very small amount of time & no experience with these tools - Any help is greatly appreciated!

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• Windows Azure : quand le Cloud vend des avions, Boeing utilise la plate-forme de Microsoft pour modéliser ses appareils

  Windows Azure : quand le Cloud vend des avions Boeing utilise la plate-forme de Microsoft pour modéliser ses appareils Lors du PDC (une de ses conférences pour développeurs) de l'année dernière, Microsoft avait illustré la puissance de calcul de Windows Azure par une démonstration ludique et très concrète. Les studios Pixar étaient montés sur scène pour montrer comment ils utilisaient un nombre variable d'instances hébergées pour obtenir le rendu de certaines scènes de leurs films. Un rendu qu'ils n'auraient pu obtenir, ou pas aussi rapidement, avec leurs propres outils internes. [IMG]http://ftp-developpez.com/gordon-fowler/AzurePixar.jpg[/IMG] P...

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• Opensource package for securly allowing users to log in and provide information

  - by JTS

  I have a site written in mostly php and html. I also have a sql database of personal information like names and addresses. I would like my users to be able to log in to my website with a login I can email or snail mail to them, and view and edit their information on my database. Users can currently enter information online I and store it in my database but they can't view or edit stored information. I can add the code to do this, but when I give users the ability to view information I suddenly have a lot more security concerns. Is there an open source package to deal with allowing users to do something like this? Or is there an established convention for this? I know this is a pretty basic question, and there might be some good literature about it that I have yet to find, so if someone can just point me in the direction of some of that information, or better yet give me firsthand some information about this that would be great.

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• What are good words for defining multiples?

  - by Scott Langham

  In databases you might take about one-to-many. This means there's one thing that maps to zero or more others. In this kind of style I'm looking for words that define min/max amounts of things. So far, I have: min max one 1 1 many 0 infinite optional 0 1 ??? 1 infinite Is there a single word that fits '???' to mean more than one? Do you have better alternatives for 'optional'? I'm wondering if there are any conventional names for those concepts?

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• Allowed keywords for adwords [closed]

  - by Tom Gullen

  Possible Duplicate: Ok to target product names in adwords? I've replaced relevant words away from the real world without losing semantics which is a little difficult. A competitor is called "Box Maker" Can I target the keywords: "box maker" if my company is selling a tool to help you make boxes? Or is that disallowed? Would "Box Maker" the company be able to file a complain on Google? Would it go anywhere? The term 'box maker' gets a lot of searches and is an incredibly cost effective search to target

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• Inexpensive generation of hierarchical unique IDs

  - by romaninsh

  My application is building a hierarchical structure like this: root = { 'id': 'root', 'children': [ { 'name': 'root_foo', 'children': [] }, { 'id': 'root_foo2', 'children': [ { 'id': 'root_foo2_bar', 'children': [] } ] } ] } in other words, it's a tree of nodes, where each node might have child elements and unique identifier I call "id". When a new child is added, I need to generate a unique identifier for it, however I have two problems: identifiers are getting too long adding many children takes slower, as I need to find first available id My requirement is: naming of a child X must be determined only from the state in their ancestors When I re-generate tree with same contents, the IDs must be same or in other words, when we have nodes A and B, creating child in A, must not affect the name given to children of B. I know that one way to optimize would be to introduce counter in each node and append it to the names which will solve my performance issue, but will not address the issue with the "long identifiers". Could you suggest me the algorithm for quickly coming up with new IDs?

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• Using "prevent execution of method" flags

  - by tpaksu

  First of all I want to point out my concern with some pseudocode (I think you'll understand better) Assume you have a global debug flag, or class variable named "debug", class a : var debug = FALSE and you use it to enable debug methods. There are two types of usage it as I know: first in a method : method a : if debug then call method b; method b : second in the method itself: method a : call method b; method b : if not debug exit And I want to know, is there any File IO or stack pointer wise difference between these two approaches. Which usage is better, safer and why?

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• How to camel-case where consecutive words have numbers?

  - by Rob I

  Just wondering if anybody has a good convention to follow in this corner-corner-corner case. I really use Java but figured the C# folks might have some good insight too. Say I am trying to name a class where two consecutive words in the class name are numeric (note that the same question could asked about identifier names). Can't get a great example, but think of something like "IEEE 802 16 bit value". Combining consecutive acronyms is doable if you accept classnames such as HttpUrlConnection. But it seriously makes me throw up a little to think of naming the class IEEE80216BitValue. If I had to pick, I'd say that's even worse than IEEE802_16BitValue which looks like a bad mistake. For small numbers, I'd consider IEEE802SixteenBitValue but that doesn't scale that well. Anyone out there have a convention? Seems like Microsoft's naming guidelines are the only ones that describe acronym naming in enough detail to get the job done, but nobody has addressed numbers in classnames.

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• Stop KDE services from running

  - by Gabriel

  I recently installed KDE with the command sudo apt-get install kubuntu-desktop. Now whenever I log into Unity I can see KDE-related services running in the background and I see no obvious way to prevent them from opening at startup. I checked bum but I see nothing there. These are the services I see running right now: kde4 klauncher knotify4 These ones I can identify as being related to KDE given their names, but there could be more. How can I prevent these services from launching by themselves? I should mention I often use KDE applications such as kate, okular and kile. Could these be responsible for opening those services?

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• How can I edit (in MS Expression Web ) FrontPage Site Parameters (Substitutions)?

  - by Clay Nichols

  Or, asked another way: Where are the values for MS Front Page Substitions (Site Parameters) stored? (so that I can edit in Web Expressions) Background I'm ashamed to admit that I've been maintaining our company's website in MS FrontPage for over 9 years. I'm moving it to Expression Web, which will display the Substitutions (stored as Site Parameters) but I can't figure out where to edit them. I tried searching the source folders for the website (on my development PC) for the name of the parameter (s-Variable=hoursOfOperation) but did not find it (other than in the files it was actually used in.

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• Multiple TOC with MediaWiki using section headings in single page

  - by user1704043

  I'm running my own installation of MediaWiki, which has been great! I haven't been able to find the answer to this small problem in any post, how to, etc. Here's the setup: Article TOC (limited to showing only H1 and H2) ==H1== ===H2=== ====H3==== ====H3==== I don't want the H3 to show up on the main table of contents, because it would make the list very long. Instead, under the H2, I would like to display another TOC with all the H3's under that listing. From my understanding, you cannot have multiple table of contents on a single page. I've thought about making a template for each H2 that has the H3 links, but that seems like it duplicates a lot of work and creates loads of pages. I'd love a template that sucks all subsection names and spits them out, but I don't see how to do that. Alternatively, is there a way to enable multiple TOCs in a custom install of MediaWiki that I'm missing? Even that would get closer to what I'm trying to do.

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• You know you're a "version control avoider" if [closed]

  - by kmote

  I'm in the process of trying to introduce Version/Revision Control to a team of developers who have never used it. I'll be giving a presentation that I hope will be a persuasive explanation of the importance of Version Control -- the benefits of using it and the liabilities of avoiding it. I'd like to kick it off with an amusing but instructive list modelled after the "redneck" line of jokes. Can anyone help me add to this list? "You know you're a Version Control Avoider if..." You have a bunch of files or folders with names like Engine_05212012_works_old[2].cpp You've had to explain to your boss how you accidentally overwrote production code. I don't consider myself terribly witty, but I think a little humor could be helpful in this situation. Any ideas for how to extend this list? [Bonus points if you can suggest a better moniker than "Version Control Avoider"]

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• Nvidia Driver versions?

  - by Patrick Krenz

  I've looked all over and can't find any reason as to why or how Nvidia names their drivers. for example they have a 330.xxx/340.xxx series that are current but also a 300.xxx and i've found that they aren't always release in order by number. Here's an example on there site with version and release date 331.38 - January 13 334.16 - Feb 7 331.49 - Feb 18 I'm really confused about what driver to actually go with, a few different series versions seem to work adequately and I just want to have an understanding of it and what the best option to work from would be. I really appreciate any information

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• What are the pros and cons of a non-fixed-interval update loop?

  - by akonsu

  I am studying various approaches to implementing a game loop and I have found this article. In the article the author implements a loop which, if the processing falls behind in time, skips frame renderings and just updates the game in a loop (the last variant called "Constant Game Speed independent of Variable FPS"). I do not understand why it is acceptable to call update_game() in a loop without making sure the update function is called at a particular interval. I do not see any value in doing this. I would think that in my game I want to be sure the game is updated periodically with a known period. So maybe it is worthwhile to have two threads, one would call update periodically, and the other one would redraw the game, also periodically? Would this be a good and practical approach? Of course I would need to synchronise the threads.

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• Handling array passed to object at creation

  - by cecilli0n

  When creating my object I pass it an array of a row from my database. (everything in the array we will need, disregarding unnecessary elements at sql query level) When I need to access certain array elements from within my class, I do so like $this->row['element'] However, As I continue development, I sometimes forget what exactly is in this passed array.(this itself doesn't seem good) I am wondering if their is a professional approach to dealing with this, Or am I the only one who has these "I wonder whats in the array" thoughts. One approach to tackling this could be that when we originally pass the array, in the constructor, we assign each element of the array to its own variable, but is this considered professional practice? Additionally by doing this, we could make those variables constants, in a attempt at immutability. Overall I am trying to adhere to good software craftsmanship. Regards.

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• Unity: Assigning String value in inspector

  - by Marc Pilgaard

  I got an issue with Unity I can't seem to comprehend, and it is possibly very simple: I am trying to write a simple piece of code in JavaScript where a button toggles the activation of a shield, by dragging a prefab with Resources.load("ActivateShieldPreFab") and destroying it again (Haven't implemented that yet). I wish to assign this button through the inspector, so I have created a string variable which appears as intended in the inspector. Though it doesn't seem to register the inspector input, even though I changed the value through the inspector. It only provides the error: "Input Key named: is unknown" When the button name is assigned within the code, there is no issues. Code as follows: var ShieldOn = false; var stringbutton : String; function Start(){ } function Update () { if(Input.GetKey(stringbutton) && ShieldOn != true) { Instantiate(Resources.load("ActivateShieldPreFab"), Vector3 (0, 0, 0), Quaternion.identity); ShieldOn = true; } } Hope somebody can help, in advance... Thanks

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• Seperate .com domain name purchasing for a VPS

  - by adamk

  I am looking at getting a VPS with RackSRV, and they don't sell domain names, but are happy to set it up after I get one elsewhere. Can anyone recommend somewhere I can purchase just the domain, and not have any hassles moving it afterwards? (Or can I just purchase the domain and make it point at the RackSRV ip address, while still using the domain sellers' control panel? I don't really understand that part of it enough! :)) I want the domain name registered in my name, ideally with myself as the technical and administrative contacts for simple transfers.

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