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• How to handle a Tile Map Scrolling [duplicate]

  - by DGomez

  This question already has an answer here: Implementing a camera / viewport to a 2D game 1 answer i'm making a video game, and i'm having, i think, a concept problem. The game will be a platformer which will use tile maps, so to start i will create a mask matrix indicating the tiles to be loaded, and etc..., so my problem is, how to handle the scrolling? should i create a giant mask matrix indicating in each position of the whole level what is supposed to be loaded, and according to the position of the player, change the section to be drawed?? Is this a correct approach to this situation??

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• Which API for cross platform mobile audio?

  - by deft_code

  This question focuses on the API's available on phones. I'd been planning to use OpenAL in my game for maximum portability. It runs great on Linux so I can quickly develop the Game and leverage it's superior debugging tools. However I've recently heard that Android doesn't support OpenAL well. Instead they've gone with a OpenSL ES library. What I'm looking for is a free Audio library that I can use with minimal custom code on iPhone, Android, and my Linux desktop. Does such an API exists? Some extra details: The game is written in C++ with custom minimal front ends. ObjC for iPhone, Java for Android, and SFML for Desktops. I'm using OpenGL ES for portability as iPhone doesn't support the more advanced OpenGL APIs.

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• Help comparing Cocos2d and Unity3d for this project [closed]

  - by Omega

  I will not go into details, but I would like to hear your opinions about this: Essentially, my project will be a 2d game, with lots of complex levels, where some might be simple and others might be a bit more deep, with physics, etc. We want to implement our very own online structure: logging in, leaderboards, achievements, friends etc with our own servers. This means no OpenFeint nor GameCenter at all. We expect this game to be very large in both graphics and audio. We wish to use in-app purchases. Now, we considered two options. Cocos2d and Unity3d. We need help deciding using the factors I mentioned before (networking, good performance even for a large game in terms of graphics and audio like this, in-app purchases, etc) which option would fit better this? Technically, both options can create 2d games. I'd like to hear your opinion.

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• Developing GLSL Shaders?

  - by skln

  I want to create shaders but I need a tool to create and see the visual result before I put them into my game. As to determine if there is something wrong with my game or if it's something with the shader I created. I've looked at some like Render Monkey and OpenGL Shader Designer from what I recall of Render Monkey it had a way to define your own attributes (now as "in" for vertex shaders = 330) easily though I can't remember to what extent. Shader Designer requires a plugin that I didn't even bother to look at creating cause it's an external process and plugin. Are there any tools out there that support a scripting language and I could easily provide specific input such as float movement = sin(elapsedTime()); and then define in float movement; in the vertex shader ? It'd be cool if anyone could share how they develop shaders, if they just code away and then plug it into their game hoping to get the result they wanted.

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• Why wont the LibGDX's main class Initialize on Android Launcher?

  - by BluFire

  So I was searching for different ways that could suit me in programming and came across LibGDX. Naturally I looked at the tutorial. As I was doing it, I was following the steps word for word, except naming the classes. In the end, I was able to create the desktop launcher for the game but not the android launcher. The following error is my error: Cannot instantiate the type Game (Game is the name of the class) I got the tutorial from http://steigert.blogspot.com.au/2012/02/1-libgdx-tutorial-introduction.html The link in the tutorial is the original but it uses jogl instead of lwjgl.

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• Is it better to cut and store all sprites needed from a spritesheet in memory, or cut them out just-in-time?

  - by xLite

  I'm not sure what's best practice here as I have little experience with this. Essentially what I am asking is... if it's better to get your single PNG with all your different sprites on it for use in-game, cut out every sprite on startup and store them in memory, then access the already-cut-out sprite from memory quickly or Only have the single PNG with all the different sprites residing in memory, and when you need, for example, a tree. You cut out the tree from the PNG and then continue to use it as normal. I imagine the former is more CPU friendly than the latter but less memory friendly, vice versa for the latter. I want to know what the norm is for game dev. This is a pixel based game using 2D art. Each PNG is actually an avatar's sprite sheet with each body part separated and then later joined to form the full body of the avatar.

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• Is there an AIR native extension to use GameCenter APIs for turn-based games?

  - by Phil

  I'm planning a turn based game using the iOS 5 GameCenter (GameKit) turn-based functions. Ideally I would program the game with AIR (I'm a Flash dev), but so far I can't seem to find any already available native extension that offers that (only basic GameCenter functions), so my questions are: Does anyone know if that already exists? And secondly how complex a task would it be to create an extension that does that? Are there any pitfalls I should be aware of etc.? ** UPDATE ** There does not seem a solution to the above from Adobe. For anyone who is interested check out the Adobe Gaming SDK. It contains a Game Center ANE which I've read contains options for multiplayer but not turn-based multiplayer, at least it's a start. Comes a bit late for me as I've already learned Obj-c!

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• Connect players with same phone language settings

  - by Abin George

  I am working on a turn-based multiplayer game using game center. The game also use Spanish localisation. It is enabled by reading the device language settings. Now my requirement is: When i start a turn based match, my opponent should have the same language setting in his/her phone as I am having. How can I make this possible. I use the following code to connect - (void)findTurnBasedMatchWithViewcontroller:(UIViewController *)viewController forDelegate:(id)argDelegate { self.delegate = argDelegate; presentingViewController = viewController; GKMatchRequest *request = [[GKMatchRequest alloc] init]; request.minPlayers = 2; request.maxPlayers = 2; [manager setCurrentGameType:kTurnBased]; GKTurnBasedMatchmakerViewController *mmvc = [[GKTurnBasedMatchmakerViewController alloc] initWithMatchRequest:request]; mmvc.turnBasedMatchmakerDelegate = self; mmvc.showExistingMatches = NO; [presentingViewController presentViewController:mmvc animated:YES completion:^(void) { }]; }

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• How to store and update data table on client side (iOS MMO)

  - by farseer2012

  Currently i'm developing an iOS MMO game with cocos2d-x, that game depends on many data tables(excel file) given by the designers. These tables contain data like how much gold/crystal will be cost when upgrade a building(barracks, laboratory etc..). We have about 10 tables, each have about 50 rows of data. My question is how to store those tables on client side and how to update them once they have been modified on server side? My opinion: use Sqlite to store data on client side, the server will parse the excel files and send the data to client with JSON format, then the client parse the JOSN string and save it to Sqlite file. Is there any better method? I find that some game stores csv files on client side, how do they update the files? Could server send a whole file directly to client?

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• Process of getting DEJUS rating (Brazil)?

  - by feklee

  I would like to get DEJUS rating for my HTML5 game on the Firefox Marketplace, so that I can tell Mozilla to make the game available to users in Brazil. I want the game to be rated as: Livre (general) Can non-Brazilian citizens request ratings from DEJUS? If so, what documents need to be provided, and in which language? What I have found so far: Submission form in English (note that there is no country field in the address form, and it's necessary to specify CPF/CNPJ) Description of procedure in Portuguese. Process flow chart in Portuguese. Practical guide to rating system in English.

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• Spawning bullets on command in Box2D

  - by recharge330

  I'm making a simple bullet hell game but I can't figure out how to get my character to shoot. Lets say I have bulletBody and shipBody, how would I continually spawn bulletBodies using the shipBody coordinates. I've tried a function that uses an array of b2bodies and just assigns them the bodydef and fixture but that causes the game to crash. C++ sample code would be best but any help is appreciated. EDIT: It looks like any reference to my b2World in a function will cause the game to crash. How do I declare the bodies without using a b2World as an argument in the function.

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• How to run a Game/Software with a proxy?

  - by user23392

  How to run a software or a game using a proxy, i know how to apply a proxy on browser but how to do it for a PC software? Note: Using a laptop running Windows vista. Thanks

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• How does sprite customization in 2D games work?

  - by Alouette

  I´m working on the design of a new game concept at the moment and I would like to know how to handle a customization of sprites. (In 2D that is, hence the topic.) This is my scenario: The player will have a tower containing 3 floors (or more). Each floor can be replaced by another "piece", i.e. a blue floor, a fire floor, a stone floor. With the little knowledge of game development I have, creating a sprite for each possible combination is probably not a good idea, since the size of the game file will be HUGE. So, how does developers solve this? Do you put a standard position and just replace the sprite itself? Any advice or information about this would be great. Regards.

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• Enabling and Disabling components in Unity

  - by Blue

  I'm trying to create an enable/ disable game objects in Unity. I used GameObject.SetActiveRecursively but it only works one-way. I used a collider in which when an object enters the collider. The game objects become enabled. When they leave or get to a certain point, they disable. How would I make this a two way system, making it able to be enabled while inside the collider and disabled when outside the collider? -- The collider is in the game object who is being disabled and enabled. According to this information from Unity Answers, the object becomes disabled. So how would I make the object enabled?

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• How does N create it's tileset?

  - by Darestium

  I am trying to recreate a Multiplayer version of the popular flash game N in java. I have a single question however. Are the tiles for the games draw or are they defined with mathamatical formulars/In code? Since I do see how they would scale up in flash if they were not. So if anyone has any ideas how I should go about creating the tileset, or how they are created in the game please let me know. You can check out the game here.

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• Server costs and back loading for mobile devices

  - by user23844

  A company approached me to design an MMO for the mobile platform and I have the perfect idea for them. My question is how much would a server for a FTP game that has both a PVE element and PVP cost? Also do you think that it would be better or is it even possible to back load the data onto the phones (trying to come up with some interesting way to back up the data in case of emergency). I don't want the game to be totally online reliant (I want to appeal to not only phone users but also iPod touch users) and for there to be an offline mode. If you can't tell this is my first game besides simple projects I've done on the side. Any help would be greatly appreciated.

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• How to load data for specific level at runtime?

  - by Siddharth

  I'm trying to create a game with many levels loaded from XML files. In my game I have many objects in each level. At present my game contains 20 levels, and I load all the textures at once on startup. But I think the correct way to do it is to only load textures used in the current level. I don't know how to do that. So please explain this by providing some example code. At present I create a class for each type of entity by extending my Sprite class. This subclass loads the appropriate image. I know this is not the best way to do things. Basically I want to know how to load large levels efficiently in Andengine. What is the proper method for loading textures, level data and background images from files when the level is run?

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• Purchasing a TV show adaptation rights, how does it work?

  - by Mikalichov

  Basically, I was thinking about a game based on a TV show, just for fun, and ended up thinking "well, it's not like it can be made anyway". Or can it? In the present situation, developing a game by myself/ourselves on my/our free time, and then using crowdfunding to purchase the rights is not that crazy, if the show is really popular... and the rights not too expensive. Purchasing the rights of the whole show is obiously a sh!tload of money, but what about adaptation rights? What is the range of price it can be? Is it a percentage of the full rights? Does it depend on the kind of adaptation (novel vs. toy vs. game)? ps: if it can help answer, I was thinking about a MLPFIM retro RPG. Please don't laugh at me.

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• 2-D Lighting Theory

  - by Richard

  I am writing a rogue-like 'zombie' management game. The game map will be similar to Prison Architect. A top-down 50 X 50 grid. I want to implemented a day night cycle and during the night I would like the player to be able to position lights. I would like to be able to lighten and dark to whole map to display the day and night cycle. Then lights would be a circle of light blocked by game entities such as walls, players, trees etc. How would I achieve and what is the standard way of achieving this?

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• Help with Meshes, and Shading

  - by Brian Diehr

  In a game I'm making in LibGdx, I wish to incorporate a ripple effect. I'm confused as to how I get access to the individual pixels on the screen, or any way to influence them (apart from what I can do with sprite batch). I have my suspicions that I have to do it through openGL, and it has something to do with apply a mesh? This brings me to my question, what exactly is a mesh? I've been working on my game for about half a year, and am doing great with the other aspects of the game, but I find this more advance stuff isn't as well documented. Thanks!

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• Possible to map mouse coordinates to isometric tiles with this coordinate system?

  - by plukich

  I'm trying to implement mouse interaction in a 2d isometric game, but I'm not sure if it's possible given the coordinate system used for tile maps in the game. I've read some helpful articles like this one: How to convert mouse coordinates to isometric indexes? However, this game's coordinate system is "jagged" for lack of a better word, and looks like this: Is it even possible to map mouse coordinates to this successfully, since the y-axis can't be drawn on this tile-map as a straight line? I've thought about doing odd-y-value translations and even-y-value translations with two different matricies, but that only makes sense going from tile-screen.

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• What encryption algorithm/package should I use in a betting game type situation?

  - by user299648

  I have a betting type site where I publish a number (between 0-100) that is encrypted. Then after a period of time, I would review what the number is and prove it with a key to decrypt the encrypted number to prove that I'm not cheating. I also want it to be easily verifiable by an average user. What encryption algorithm/technique/package should I use? I'm no expert on cryptography. There seems to be so many options out there and I'm not sure what to use. python friendly is a plus.

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• What should be learned for someone starting in Android Games?

  - by user14544

  I know this might be a little subjective. But I've read the other questions. A lot of answers kept on popping up like to use box2d, libgdx, andEngine, etc. So the real question is, what would be the best to start off with as a beginner. I have some experience with java code, just by reading about in the Oracle Docs. I've gone through Flash and Eclipse. When i mean gone through, i don't mean i have actually created my own game from Flash or Eclipse, but i just learn things here and there. Currently I'm reading Beginning Android for Beginners but I don't have the knowledge to implement my own Ideas into the game tutorials because of lack of experience. I'm looking for a way to learn how to program to create games for Android. While at the same time get experience from programming. I do not want to learn those drag and drop game making applications such as GameMaker.

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• How do I make a Java gave without a JFrame?

  - by kullalok

  I am working on an arcade-like game, and so far, I have been using JFrame. All the action occurs in the JFrame basically. However, I've noticed that a lot of games that you install on a computer don't have a frame. When you play them on Windows, the game covers the entire screen (the start bar disappears and you can't access any other application on your computer). I'd like to do that for my game. Is it possible to do so with Java? If so, how would I do this?

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• How to access variables of uninitialized class?

  - by oringe

  So I've gone with a somewhat singleton approach to my game class: #include "myGame.h" int main () { myGame game; return game.Execute(); } But now I need to define a class that accesses variables in the instance of myGame. class MotionState { public: virtual void setWorldTransform (...) { VariableFromMyGameClass++; //<-- !? ...} }; I'm trying to integrate this class into my project from an example that just uses globals. How can I access variables of myGame class in the definition of new classes? Should I give up on my singleton approach?

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