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• <html:select> inside <logic:iterate>

  - by TPT Gin

  I have an itemList and for each item, a dropdown list of ratings is displayed. After user rates each item in itemList, i want to store those rates in an array. How can I do it? selectedRate below is of Integer type, and the code failed to solve the problem. <logic:iterate id="item" name="itemList"> <tr> <td> <html:select name="aForm" property="selectedRate"> <html:optionsCollection name="allRates" label="description" value="value" /> </html:select> </td> </tr> </logic:iterate>

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• Separate Logic from presentation without using template engine

  - by jasmine

  How can we separate Logic from presentation without using any template engine (traditional php-not OOP) Thank in advance

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• what is the logic behind the Thread.sleep() in java

  - by Suresh S

  Anybody know ,what is the logic behind Thread.sleep in java? . Are they using timer

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• where to put business logic in a library?

  - by fayer

  i'm going to create a library that consists of a lot of separate classes. i'm very familiar with mvc but have never created a pure library before. i wonder where i should put the business logic? the logic that is in the controller in a mvc. should it be in a class? or in a "bootstrap" file? and should one file include every class, or should only one class include its classes it uses? thanks!

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• how do i install a game patch on an external hard drive

  - by shadow

  I have a 2tb external hard drive and I want to install battlefield 1942 on it. i can get the game on the hard drive without problems, and it runs great. the problem is that i have an outdated version, and i need to install a patch. thats when it gets iffy. i get the patch and start the install, and it finishes, but it doesnt install to the game itself. it goes to its own seperate folder, and that does nothing to the game. the patch installer doesnt ask me where the game is, and so im thinking that it cant find the game itself, and then screws up. any help would be great!

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• Putting logic in ViewModel get'ers

  - by Yngvebn

  What do you think about putting Get-logic in the getters of a ViewModel? Something like: public class DummyViewModel { public int Id { get; set; } private DummyObject myObject; public DummyObject MyObject { get { if (MyObject == null) { DummyRepository repo = new DummyRepository(); myObject = repo.Get(Id); } return myObject; } } } Is this bad practice, or totally fine? I find my controllers getting really bloated by doing all the get-logic there, but I'm really torn as to where I should put it... My reason for doing it this way, is that I can pass the ViewModel to different types of view, and only the neccessary DB-lookup will be performed based on what property is requested.

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• Logic iterator in struts

  - by DineshDu

  how to iterate a list which is inside another list? using struts logic iterator

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• I want to know the logic behind Array.Reverse method

  - by prantick

  what is the native logic work behind public static void Reverse(Array array, int index, int length);

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• Force Direct3D anti-aliasing in a Direct3D game?

  - by James McLaughlin

  Some old games look really jagged nowadays on large displays without any anti-aliasing, but don't have any option built-in to the game to enable it. On a PC with an NVIDIA graphics card, it's possible to force anti-aliasing in the NVIDIA control panel which can really improve this. But I'm playing the game in Parallels on a Mac, and although the Mac has an NVIDIA graphics card, it's Parallels' emulated card that Windows sees and so obviously there's no NVIDIA control panel. Is there some generic way I can force anti-aliasing for a Direct3D game without using the NVIDIA control panel?

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• iPhone game center can't create sandbox account

  - by William Jockusch

  Whenever I try to create an account on the simulator or device, I get a message "game center account services are currently unavailable. Please try again later." Furthermore, I have never been able to sign in to the game center app on the simulator. Interestingly, if I reset my device with iTunes, I can then log in to the Game Center app with my regular apple id. But whenever if I log out, then try to create a sandbox account for an app I am developing, it always fails as described above. Any suggestions?

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• Can't Connect To A Game Server

  - by Kirs Kringle

  I'm having issues connecting to a certain game server. The game is Space Engineers. I did a wireshark and the owner of the server did as well and it just tries to request and bind until it times out on the client of the game. Nothing is dropped or red it just doesn't connect to download data from the server. Other people are able to connect to the server just fine. I do not think it is an issue with the server, but what could it possibly be and what can I do to get rid of this problem? I've tried cleaning registry, shutting off windows firewall, restarting my computer, and most recently the wireshark. Thanks,

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• Is it possible to build a single game to run in Facebook & Google+?

  - by Songo

  I was asked by my customer to build a Facebook game. The game would be something similar to Mafiawars.com where the game is hosted on a server and run through a frame on Facebook. The thing is after several days of negotiations with the customer and near the finalization of the requirements he mentioned something strange. He said that if the game was successful on Facebook then we may add it to Google+ too. I thought he meant that we'll develop a new version for Google+, but he refused as he argued that the game should be able to support both sites and he won't pay for the same game twice. Now I haven't developed neither Facebook nor Google+ games before, so I don't know if it is possible to build a single Facebook/Google+ game. How would you react to such requirement? How would you design such an application? Notes I confirmed with the customer that he wasn't talking about using Open ID he wanted full integration (sharing post, friend requests,..etc.) I really don't want to lose that customer for numerous reasons (He even agreed to extend the project time to compensate for the time I need to learn Facebook/Google+ APIs)

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• What would be the fastest way of storing or calculating legal move sets for chess pieces?

  - by ioSamurai

  For example if a move is attempted I could just loop through a list of legal moves and compare the x,y but I have to write logic to calculate those at least every time the piece is moved. Or, I can store in an array [,] and then check if x and y are not 0 then it is a legal move and then I save the data like this [0][1][0][0] etc etc for each row where 1 is a legal move, but I still have to populate it. I wonder what the fastest way to store and read a legal move on a piece object for calculation. I could use matrix math as well I suppose but I don't know. Basically I want to persist the rules for a given piece so I can assign a piece object a little template of all it's possible moves considering it is starting from it's current location, which should be just one table of data. But is it faster to loop or write LINQ queries or store arrays and matrices? public class Move { public int x; public int y; } public class ChessPiece : Move { private List<Move> possibleMoves { get; set; } public bool LegalMove(int x, int y){ foreach(var p in possibleMoves) { if(p.x == x && p.y == y) { return true; } } } } Anyone know?

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• How would I go about sharing variables in a class with Lua?

  - by Nicholas Flynt

  I'm fairly new to Lua, I've been working on trying to implement Lua scripting for logic in a Game Engine I'm putting together. I've had no trouble so far getting Lua up and running through the engine, and I'm able to call Lua functions from C and C functions from Lua. The way the engine works now, each Object class contains a set of variables that the engine can quickly iterate over to draw or process for physics. While game objects all need to access and manipulate these variables in order for the Game Engine itself to see any changes, they are free to create their own variables, a Lua is exceedingly flexible about this so I don't forsee any issues. Anyway, currently the Game Engine side of things are sitting in C land, and I really want them to stay there for performance reasons. So in an ideal world, when spawning a new game object, I'd need to be able to give Lua read/write access to this standard set of variables as part of the Lua object's base class, which its game logic could then proceed to run wild with. So far, I'm keeping two separate tables of objects in place-- Lua spawns a new game object which adds itself to a numerically indexed global table of objects, and then proceeds to call a C++ function, which creates a new GameObject class and registers the Lua index (an int) with the class. So far so good, C++ functions can now see the Lua object and easily perform operations or call functions in Lua land using dostring. What I need to do now is take the C++ variables, part of the GameObject class, and expose them to Lua, and this is where google is failing me. I've encountered a very nice method here which details the process using tags, but I've read that this method is deprecated in favor of metatables. What is the ideal way to accomplish this? Is it worth the hassle of learning how to pass class definitions around using libBind or some equivalent method, or is there a simple way I can just register each variable (once, at spawn time) with the global lua object? What's the "current" best way to do this, as of Lua 5.1.4?

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• How do I model teams and gameplay in this scorekeeping application?

  - by Eric Hill

  I'm writing a scorekeeping application for card game that has a few possibly-interesting constraints. The application accepts user registrations for players, then lets them check-in to a particular game (modeled as Event). After the final player registers, the app should generate teams, singles or doubles, depending on the preference of the person running the game and some validations (can't do doubles if there's an odd number checked in). There are @event.teams.count rounds in the game. To sum up: An event consists of `@event.teams.count` rounds; Teams can have 1 or more players Events have n or n/2 teams (depending on whether it's singles or doubles) Users will be members of different teams at different events Currently I have a rat's nest of associations: class User < ActiveRecord::Base has_many :teams, :through => :players has_many :events, :through => :teams class Event < ActiveRecord::Base has_many :rounds has_many :teams has_many :players, :through => :teams class Player < ActiveRecord::Base belongs_to :user belongs_to :team end class Team < ActiveRecord::Base has_many :players belongs_to :event end class Round < ActiveRecord::Base belongs_to :event belongs_to :user end The sticky part is team generation. I have basically a "start game" button that should freeze the registrations and pair up teams either singly or doubly, and render to Round#new so that the first (and subsequent) matches can be scored. Currently I'm implementing this as a check on Round#new that calls Event#generate_teams and displays the view: # Event#generate_teams def generate_teams # User has_many :events, :through => :registrations # self.doubles is a boolean denoting 2 players per team registrations.in_groups_of(self.doubles ? 2 : 1, nil).each do |side| self.teams << Player.create(self,side) end end Which doesn't work. Should there maybe be a Game model that ties everything together rather than (my current method) defining the game as an abstraction via the relationships between Events, Users, and Rounds (and Teams and Players and etc.)? My head is swimming.

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• How would I go about sharing variables in a C++ class with Lua?

  - by Nicholas Flynt

  I'm fairly new to Lua, I've been working on trying to implement Lua scripting for logic in a Game Engine I'm putting together. I've had no trouble so far getting Lua up and running through the engine, and I'm able to call Lua functions from C and C functions from Lua. The way the engine works now, each Object class contains a set of variables that the engine can quickly iterate over to draw or process for physics. While game objects all need to access and manipulate these variables in order for the Game Engine itself to see any changes, they are free to create their own variables, a Lua is exceedingly flexible about this so I don't forsee any issues. Anyway, currently the Game Engine side of things are sitting in C land, and I really want them to stay there for performance reasons. So in an ideal world, when spawning a new game object, I'd need to be able to give Lua read/write access to this standard set of variables as part of the Lua object's base class, which its game logic could then proceed to run wild with. So far, I'm keeping two separate tables of objects in place-- Lua spawns a new game object which adds itself to a numerically indexed global table of objects, and then proceeds to call a C++ function, which creates a new GameObject class and registers the Lua index (an int) with the class. So far so good, C++ functions can now see the Lua object and easily perform operations or call functions in Lua land using dostring. What I need to do now is take the C++ variables, part of the GameObject class, and expose them to Lua, and this is where google is failing me. I've encountered a very nice method here which details the process using tags, but I've read that this method is deprecated in favor of metatables. What is the ideal way to accomplish this? Is it worth the hassle of learning how to pass class definitions around using libBind or some equivalent method, or is there a simple way I can just register each variable (once, at spawn time) with the global lua object? What's the "current" best way to do this, as of Lua 5.1.4?

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• Fitch Format Proofs - any resources around?

  - by devoured elysium

  I am currently studying Fitch Format first order logic proofs. My lecturer follows closely Language, Proof and Logic by Jon Barwise. I am trying to do some proofs but I am having some trouble getting to understand how to do these proofs. As I have already read what Language Proof and Logic has to offer, I'd like to know if there are any other books or resources around that use the Fitch format for their formal proofs. Plus, having solved exercises would be of great(!) help. Thanks

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• How to make game sessions like "with friends" games?

  - by Miguel lugo

  I want to make a game like "words with friends" or "chess with friends" or "Draw Something" or any of the other online multiplayer type games that are based around friends having game sessions with each other. I have made one app before that had no online features so I know the basics of objective-C and xCode. I looked up facebook connect so I know how to make friends find other friends to play with through Facebook. Just not how to make the gaming session. I only need my game to send a small array (or XML if it's better) of strings and integers from one iPhone to the other as each iPhone takes a turn. I'm NOT sending some complex video or anything like in "Draw Something." I was hoping someone could point me in the right direction (whether link to website or book or just a general idea) for how to do gaming sessions between two iPhones. I read this tutorial http://www.raywenderlich.com/3932/how-to-create-a-socket-based-iphone-app-and-server but it seems to be more about having two iPhones communicate over a server on a laptop or through the same wifi, not how to have iPhones game together over any Internet connection like in "with friends" games. I've tried to research this in other places but I'm never quite sure if what the articles I find are talking about is related to what I want or not. Someone please just point me in the right direction or give me a general outline of what to do. I will look up the specifics on my own once I know what to look for. Thank you.

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• Need help in determing what, if any, tools can be used to create a free Flash game

  - by ReaperOscuro

  Yes I proudly -and sadly- declare that I am a complete nincompoop when it comes to Flash, and I have been fishing around the big wide web for information. The reason for this is that I have been contracted to create a game(s) for a website -the usual flash-based games caveat. Please I do not mean things like by those gaming generator websites, I mean small yet professional games- but the caveat, as always, is that impossible dream: it needs to be done all for free. The budget...well imagine it as not there. Annoyingly is that I am a game designer yes, but with a ridiculously tight deadline I haven't got much time to re-learn (ah the heady days of programming at uni) everything by the end of March, so I'd like to ask some people who know their stuff rather than keep looking at a gazillion different things. This is my understanding: with the flash sdk you can create a game, albeit you need to be pretty programming savvy. FlashDevelop helps there -yet I am not entirely sure how. Yet even FD says to use Flash for the animation/graphics. Yes its undeniably powerful but as I said there is the unattainable demand of no money. The million dollar question: what, if any, tools can I use to create a free flash game?

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• Is there a way to legally create a game mod?

  - by Rodrigo Guedes

  Some questions about it: If I create a funny version of a copyrighted game and sell it (crediting the original developers) would it be considered a parody or would I need to pay royalties? If I create a game mod for my own personal use would it be legal? What if I gave it for free to a friend? Is there a general rule about it or it depends on the developer will? P.S.: I'm not talking about cloning games like this question. It's all about a game clearly based on another. Something like "GTA Gotham City" ;) EDIT: This picture that I found over the internet illustrate what I'm talking about: Just in case I was not clear: I never created a mod game. I was just wondering if it would be legally possible before trying to do it. I'm not apologizing piracy. I pay dearly for my games (you guys have no idea how expensive games are in Brazil due to taxes). Once more I say that the question is not about cloning. Cloning is copy something and try to make your version look like a brand new product. Mods are intended to make reference to one or more of its source. I'm not sure if it can be done legally (if I knew I wasn't asking) but I'm sure this question is not a duplicate. Even so, I trust in the moderators and if they close my question I will not be offended - at least I had an opportunity to explain myself and got 1 good answer (by the time I write this, maybe some more will be given later).

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• Rendering a big game universe - bitmaps or vector graphics?

  - by user1641923

  I am new to an Android development, though I have much experience with Java, C++, PHP programming and a bit experience with vector graphics too (basic 3d Studio Max, Flash, etc). I am starting to work on an Android game. It is going to be a 2D space shooter/RPG, and I am not going to use any game engines and any 3D party libs. I really want to create a very large game universe, or even pseudo-infinite (without visible borders, as if it were a 2D projection of a sphere). It should include 10-12 clusters of 7-8 planets/other space objects and random amount of single asteroids/comets, which player can interact with and also not interactive background. I am looking for a least complicated aproach to create such a universe. My current ideas are: Simply create bitmaps with space scenery background so that they can be tiled seamlessly repeated and construct my 2D universe of this tiles, then place interactive objects (planets, other spaceships) on it. Using vector graphics. I would have a solid color background, some random background objects and gradients here and there. My problems here: Lack of knowledge of how well vector graphics is integrated in Android. Performance? Memory usage? Does Android manage big bitmaps well? Do all of the bitmaps have to be in memory during all game process? I am interested in technical details regarding each of the ideas and a suggestion, which I should go with.

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• Publishing a game -- any way to target both WP7 and Win8 Store?

  - by Rei Miyasaka

  I'm at a dilemma which seems should soon become an important issue for a lot of developers. If I build a game in XNA, I won't be able to publish it on the Windows 8 Store, as it would be a classic application -- and classic applications can't be sold on the store. If I build a game in Metro DirectX, I would be able to sell it on the Store, but porting it to Windows Phone would involve porting it to Reach XNA, which in fact would likely involve more effort even than porting to OS X or Android -- both of which support C++. Of all the WinRT API that is supported on C++/JS/.NET, DirectX can only be programmed from C++. It's also unlikely that Microsoft will update Windows 7 or Vista to support the new DirectX features, although that would make the Metro DirectX the first new version of DirectX to stop supporting the immediate predecessor OS. If I build a game in Pre-Win8 DirectX 9/10/11, I won't be able to sell it on the Windows Store or Windows Phone, but I could sell it on something like Steam. It would also involve the most amount of manual plumbing. In fact, DirectWrite, despite being part of DirectX 11, doesn't talk to Direct3D. I'm getting really tired of all these restrictions -- artificial and otherwise -- and I'm coming to a point where I'm considering switching to a platform with a less fragmented API, like Android or Mac/iOS. As far as bringing a game into market goes, excluding the actual market share of any platforms that I might consider, what other factors would help me in making a decision? Just a few years ago this question was a lot easier to answer: if you were primarily concerned with Windows platforms, all you had to answer was whether you wanted DirectX, XNA, or something like SlimDX. If you made the wrong decision, no biggie -- all you really would have lost is XBox and the fairly small Windows Phone market.

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• What is the best type of c# timer to use with a Unity game that uses many timers simultaneously?

  - by Kyle Seidlitz

  I am developing a stand-alone 3d game in Unity that will have anywhere from 1 to 200 timers running simultaneously. There will be a GameObject containing 1 timer. For this game timer durations will range from 5 minutes to 4 days. There will not be any countdown displays or any UI for the timers. Each object is a prefab, with all the necessary materials included. An attached script will handle the timer and all the necessary code to change the materials and make any sound effects. Once the timer is expired, the user will then click on the object again, and the object will be destroyed, and the user's inventory will be adjusted. If the user wants to save or end the game before all the timers are done, the start value of the still running timers is to be saved to an XML file such that when the game is started again, any still running timers will be checked to see if they have expired, where the object's materials will be changed appropriately. I am still trying to figure out what type of timer to use, and see also if there are any suggestions for saving and calculating times over several days. What class(es) of timers should I use? Are there any special issues I should look out for in terms of performance?

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• What is the breakdown of jobs in game development?

  - by Destry Ullrich

  There's a project I'm trying to start for Indie Game Development; specifically, it's going to be a social networking website that lets developers meet through (It's a secret). One of the key components is showing what skills members have. Question: I need to know what MAJOR game development roles are not represented in the following list, keeping in mind that many specialist roles are being condensed into more broad, generalist roles: Art Animator (Characters, creatures, props, etc.) Concept Artist (2D scenes, environments, props, silhouettes, etc.) Technical Artist (UI artists, typefaces, graphic designers, etc.) 3D Artist (Modeling, rigging, texture, lighting, etc.) Audio Composer (Scores, music, etc.) Sound Engineer (SFX, mood setting, audio implementation, etc.) Voice (Dialog, acting, etc.) Design Creative Director (Initial direction, team management, communications, etc.) Gameplay Designer (Systems, mechanics, control mapping, etc.) World Designer (Level design, aesthetics, game progression, events, etc.) Writer (Story, mythos, dialog, flavor text, etc.) Programming Engine Programming (Engine creation, scripting, physics, etc.) Graphics Engineer (Sprites, lighting, GUI, etc.) Network Engineer (LAN, multiplayer, server support, etc.) Technical Director (I don't know what a technical director would even do.) Post Script: I have an art background, so i'm not familiar with what the others behind game creation actually do. What's missing from this list, and if you feel some things should be changed around how so?

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• How to pause and resume a game in XNA using the same key?

  - by user13095

  I'm attempting to implement a really simple game state system, this is my first game - trying to make a Tetris clone. I'd consider myself a novice programmer at best. I've been testing it out by drawing different textures to the screen depending on the current state. The 'Not Playing' state seems to work fine, I press Space and it changes to 'Playing', but when I press 'P' to pause or resume the game nothing happens. I tried checking current and previous keyboard states thinking it was happening to fast for me to see, but again nothing seemed to happen. If I change either the pause or resume, so they're both different, it works as intended. I'm clearly missing something obvious, or completely lacking some know-how in regards to how update and/or the keyboard states work. Here's what I have in my Update method at the moment: protected override void Update(GameTime gameTime) { KeyboardState CurrentKeyboardState = Keyboard.GetState(); // Allows the game to exit if (CurrentKeyboardState.IsKeyDown(Keys.Escape)) this.Exit(); // TODO: Add your update logic here if (CurrentGameState == GameStates.NotPlaying) { if (CurrentKeyboardState.IsKeyDown(Keys.Space)) CurrentGameState = GameStates.Playing; } if (CurrentGameState == GameStates.Playing) { if (CurrentKeyboardState.IsKeyDown(Keys.P)) CurrentGameState = GameStates.Paused; } if (CurrentGameState == GameStates.Paused) { if (CurrentKeyboardState.IsKeyDown(Keys.P)) CurrentGameState = GameStates.Playing; } base.Update(gameTime); }

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