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• Does the windows 8 store only support windows RT?

  - by Need4Sleep

  I'm in a project for creating a game engine and eventually a game, and we need ideas on how to get our game out into the internet. I had an idea with putting it onto the windows 8 store at a low cost(or free) in order to get the word out, but does the windows 8 store only support apps programmed in windows RT? our game will be built in C++ / OpenGL / GLEW / Actionscript / GLM / etc.. , so we wont be using any windows RT functionality at all.

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• Using Copyrighted Images

  - by TMP

  I was thinking about developing a sidescrolling platformer very similar to an old Mario and Luigi game for NES. To start out I was thinking about taking the images from a site like this: http://www.mariouniverse.com/sprites/nes/smb3 Which clearly states a copyright. I was wondering how far I am allowed to take these images. I figure I'm probably allowed to use it for personal development, but what if I publish the game as an exe file and send it to some friends? I figured a definite no-no would be selling the game with the copyrighted images included. A secondary question would be whether or not I would be allowed to modify them slightly and then call them my own.

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• How do I duplicate a Box2d simulation, mid-simulation?

  - by Whyte

  I want to serialize the state mid-game, send it over the network to an identical computer (same CPU, same OS, same binary), load it there, and have the two games run in tandem doing the exact same simulation, without one of them drifting off and going haywire. In short: I want pop-in, pop-out networking support on my HIGHLY physics-intensive game, where sending object coordinates every few seconds is impossible, due to having thousands of objects, and many clients. I tried this with Box2D, and saving an object's location/velocity/etc wasn't enough... there's internal state that's not accessible through any public methods. My current workaround is to force EVERY client to save its entire worldstate and reload it from scratch, whenever a new player connects... but this is obviously bad practice, because it hangs the game for everyone whenever someone new connects. However, it works, with zero desynchronization. So, anyone know of any other techniques that can help me? Or should I just kiss my project goodbye?

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• how can I start developing games? [closed]

  - by miguelacho

  as you may know very well, every individual related with software development is somehow related to the science or the activity that the program was made for, I am currently working as a programmer for a company that is dedicated to build enterprise software for ensurance business, before this job, I was working with a travel agency developing extra modules for the CRM they use (VTiger), so I can say I am related to ERP/CRM, the fact is, I would like to change this to another activity, like developing video games. I'd like to start developing games, by getting a job or making my own project, but: 1) I have no experience developing video games, is that an obstacle if I want to get a job? if is that so, how can I solve it? 2) if I want to make my own project I will need more people, like a graphic disigner or some others, isn't there a way to make the whole game by my own?

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• XML\Jquery create listings based on user selection

  - by Sirius Mane

  Alright, so what I need to try and accomplish is having a static web page that will display information pulled from an XML document and render it to the screen without refreshing. Basic AJAX stuff I guess. The trick is, as I'm trying to think this through I keep coming into 'logical' barriers mentally. Objectives: -Have a chart which displays baseball team names, wins, losses, ties. In my XML doc there is a 'pending' status, so games not completed should not be displayed.(Need help here) -Have a selection list which allows you to select a team which is populated from XML doc. (done) -Upon selecting a particular team from the aforementioned selection list the page should display in a separate area all of the planned games for that team. Including pending. Basically all of the games associated with that team and the dates (which is included in the XML file). (Need help here) What I have so far: HTML\JS <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <link rel="stylesheet" href="batty.css" type="text/css" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Little Batty League</title> <script type="text/javascript" src="library.js"></script> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> var IE = window.ActiveXObject ? true: false; var MOZ = document.implementation.createDocument ? true: false; $(document).ready(function(){ $.ajax({ type: "GET", url: "schedule.xml", dataType: "xml", success: function(xml) { var select = $('#mySelect'); $(xml).find('Teams').each(function(){ var title = $(this).find('Team').text(); select.append("<option/><option class='ddheader'>"+title+"</option>"); }); select.children(":first").text("please make a selection").attr("selected",true); } }); }); </script> </script> </head> <body onLoad="init()"> <!-- container start --> <div id="container"> <!-- banner start --> <div id="banner"> <img src="images/mascot.jpg" width="324" height="112" alt="Mascot" /> <!-- buttons start --> <table width="900" border="0" cellpadding="0" cellspacing="0"> <tr> <td><div class="menuButton"><a href="index.html">Home</a></div></td> <td><div class="menuButton"><a href="schedule.html">Schedule</a></div></td> <td><div class="menuButton"><a href="contact.html">Contact</a></div></td> <td><div class="menuButton"><a href="about.html">About</a></div></td> </tr> </table> <!-- buttons end --> </div> <!-- banner end --> <!-- content start --> <div id="content"> <br /> <form> <select id="mySelect"> <option>please make a selection</option> </select> </form> </div> <!-- content end --> <!-- footer start --> <div id="footer"> &copy; 2012 Batty League </div> <!-- footer end --> </div> <!-- container end --> </body> </html> And the XML is: <?xml version="1.0" encoding="utf-8"?> <Schedule season="1"> <Teams> <Team>Bluejays</Team> </Teams> <Teams> <Team>Chickens</Team> </Teams> <Teams> <Team>Lions</Team> </Teams> <Teams> <Team>Pixies</Team> </Teams> <Teams> <Team>Zombies</Team> </Teams> <Teams> <Team>Wombats</Team> </Teams> <Game status="Played"> <Home_Team>Chickens</Home_Team> <Away_Team>Bluejays</Away_Team> <Date>2012-01-10T09:00:00</Date> </Game> <Game status="Pending"> <Home_Team>Bluejays </Home_Team> <Away_Team>Chickens</Away_Team> <Date>2012-01-11T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Bluejays</Home_Team> <Away_Team>Lions</Away_Team> <Date>2012-01-18T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Lions</Home_Team> <Away_Team>Bluejays</Away_Team> <Date>2012-01-19T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Bluejays</Home_Team> <Away_Team>Pixies</Away_Team> <Date>2012-01-21T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Pixies</Home_Team> <Away_Team>Bluejays</Away_Team> <Date>2012-01-23T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Bluejays</Home_Team> <Away_Team>Zombies</Away_Team> <Date>2012-01-25T09:00:00</Date> </Game> <Game status="Pending"> <Home_Team>Zombies</Home_Team> <Away_Team>Bluejays</Away_Team> <Date>2012-01-27T09:00:00</Date> </Game> <Game status="Pending"> <Home_Team>Bluejays</Home_Team> <Away_Team>Wombats</Away_Team> <Date>2012-01-28T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Wombats</Home_Team> <Away_Team>Bluejays</Away_Team> <Date>2012-01-30T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Chickens</Home_Team> <Away_Team>Lions</Away_Team> <Date>2012-01-31T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Lions</Home_Team> <Away_Team>Chickens</Away_Team> <Date>2012-02-04T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Chickens</Home_Team> <Away_Team>Pixies</Away_Team> <Date>2012-02-05T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Pixies</Home_Team> <Away_Team>Chickens</Away_Team> <Date>2012-02-07T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Chickens</Home_Team> <Away_Team>Zombies</Away_Team> <Date>2012-02-08T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Zombies</Home_Team> <Away_Team>Chickens</Away_Team> <Date>2012-02-10T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Lions</Home_Team> <Away_Team>Pixies</Away_Team> <Date>2012-02-12T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Pixies </Home_Team> <Away_Team>Lions</Away_Team> <Date>2012-02-14T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Lions</Home_Team> <Away_Team>Zombies</Away_Team> <Date>2012-02-15T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Zombies</Home_Team> <Away_Team>Lions</Away_Team> <Date>2012-02-16T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Lions</Home_Team> <Away_Team>Wombats</Away_Team> <Date>2012-01-23T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Wombats</Home_Team> <Away_Team>Lions</Away_Team> <Date>2012-02-24T09:00:00</Date> </Game> <Game status="Pending"> <Home_Team>Pixies</Home_Team> <Away_Team>Zombies</Away_Team> <Date>2012-02-25T09:00:00</Date> </Game> <Game status="Pending"> <Home_Team>Zombies</Home_Team> <Away_Team>Pixies</Away_Team> <Date>2012-02-26T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Pixies</Home_Team> <Away_Team>Wombats</Away_Team> <Date>2012-02-27T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Wombats</Home_Team> <Away_Team>Pixies</Away_Team> <Date>2012-02-28T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Zombies</Home_Team> <Away_Team>Wombats</Away_Team> <Date>2012-02-04T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Wombats</Home_Team> <Away_Team>Zombies</Away_Team> <Date>2012-02-05T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Wombats</Home_Team> <Away_Team>Chickens</Away_Team> <Date>2012-02-07T09:00:00</Date> </Game> <Game status="Played"> <Home_Team>Chickens</Home_Team> <Away_Team>Wombats</Away_Team> <Date>2012-02-08T09:00:00</Date> </Game> </Schedule> If anybody can point me to Jquery code\modules that would greatly help me with this I'd be appreciate. Any help right now would be great, I'm just banging my head against a wall. I'm trying to avoid using XSLT transforms because I absolutely despise XML and I'm not good with it. So I'd -like- to just use Javascript\PHP\etc with only a sprinkling of the necessary XML where possible..

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• Opinion on "loop invariants", and are these frequently used in the industry?

  - by Michael Aaron Safyan

  I was thinking back to my freshman year at college (five years ago) when I took an exam to place-out of intro-level computer science. There was a question about loop invariants, and I was wondering if loop invariants are really necessary in this case or if the question was simply a bad example... the question was to write an iterative definition for a factorial function, and then to prove that the function was correct. The code that I provided for the factorial function was as follows: public static int factorial(int x) { if ( x < 0 ){ throw new IllegalArgumentException("Parameter must be = 0"); }else if ( x == 0 ){ return 1; }else{ int result = 1; for ( int i = 1; i <= x; i++ ){ result*=i; } return result; } } My own proof of correctness was a proof by cases, and in each I asserted that it was correct by definition (x! is undefined for negative values, 0! is 1, and x! is 1*2*3...*x for a positive value of x). The professor wanted me to prove the loop using a loop invariant; however, my argument was that it was correct "by definition", because the definition of "x!" for a positive integer x is "the product of the integers from 1... x", and the for-loop in the else clause is simply a literal translation of this definition. Is a loop invariant really needed as a proof of correctness in this case? How complicated must a loop be before a loop invariant (and proper initialization and termination conditions) become necessary for a proof of correctness? Additionally, I was wondering... how often are such formal proofs used in the industry? I have found that about half of my courses are very theoretical and proof-heavy and about half are very implementation and coding-heavy, without any formal or theoretical material. How much do these overlap in practice? If you do use proofs in the industry, when do you apply them (always, only if it's complicated, rarely, never)?

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• xml file save/read error (making a highscore system for XNA game)

  - by Eddy

  i get an error after i write player name to the file for second or third time (An unhandled exception of type 'System.InvalidOperationException' occurred in System.Xml.dll Additional information: There is an error in XML document (18, 17).) (in highscores load method In data = (HighScoreData)serializer.Deserialize(stream); it stops) the problem is that some how it adds additional "" at the end of my .dat file could anyone tell me how to fix this? the file before save looks: <?xml version="1.0"?> <HighScoreData xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <PlayerName> <string>neil</string> <string>shawn</string> <string>mark</string> <string>cindy</string> <string>sam</string> </PlayerName> <Score> <int>200</int> <int>180</int> <int>150</int> <int>100</int> <int>50</int> </Score> <Count>5</Count> </HighScoreData> the file after save looks: <?xml version="1.0"?> <HighScoreData xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <PlayerName> <string>Nick</string> <string>Nick</string> <string>neil</string> <string>shawn</string> <string>mark</string> </PlayerName> <Score> <int>210</int> <int>210</int> <int>200</int> <int>180</int> <int>150</int> </Score> <Count>5</Count> </HighScoreData>> the part of my code that does all of save load to xml is: DECLARATIONS PART [Serializable] public struct HighScoreData { public string[] PlayerName; public int[] Score; public int Count; public HighScoreData(int count) { PlayerName = new string[count]; Score = new int[count]; Count = count; } } IAsyncResult result = null; bool inputName; HighScoreData data; int Score = 0; public string NAME; public string HighScoresFilename = "highscores.dat"; Game1 constructor public Game1() { graphics = new GraphicsDeviceManager(this); Content.RootDirectory = "Content"; Width = graphics.PreferredBackBufferWidth = 960; Height = graphics.PreferredBackBufferHeight =640; GamerServicesComponent GSC = new GamerServicesComponent(this); Components.Add(GSC); } Inicialize function (end of it) protected override void Initialize() { //other game code base.Initialize(); string fullpath =Path.Combine(HighScoresFilename); if (!File.Exists(fullpath)) { //If the file doesn't exist, make a fake one... // Create the data to save data = new HighScoreData(5); data.PlayerName[0] = "neil"; data.Score[0] = 200; data.PlayerName[1] = "shawn"; data.Score[1] = 180; data.PlayerName[2] = "mark"; data.Score[2] = 150; data.PlayerName[3] = "cindy"; data.Score[3] = 100; data.PlayerName[4] = "sam"; data.Score[4] = 50; SaveHighScores(data, HighScoresFilename); } } all methods for loading saving and output public static void SaveHighScores(HighScoreData data, string filename) { // Get the path of the save game string fullpath = Path.Combine("highscores.dat"); // Open the file, creating it if necessary FileStream stream = File.Open(fullpath, FileMode.OpenOrCreate); try { // Convert the object to XML data and put it in the stream XmlSerializer serializer = new XmlSerializer(typeof(HighScoreData)); serializer.Serialize(stream, data); } finally { // Close the file stream.Close(); } } /* Load highscores */ public static HighScoreData LoadHighScores(string filename) { HighScoreData data; // Get the path of the save game string fullpath = Path.Combine("highscores.dat"); // Open the file FileStream stream = File.Open(fullpath, FileMode.OpenOrCreate, FileAccess.Read); try { // Read the data from the file XmlSerializer serializer = new XmlSerializer(typeof(HighScoreData)); data = (HighScoreData)serializer.Deserialize(stream);//this is the line // where program gives an error } finally { // Close the file stream.Close(); } return (data); } /* Save player highscore when game ends */ private void SaveHighScore() { // Create the data to saved HighScoreData data = LoadHighScores(HighScoresFilename); int scoreIndex = -1; for (int i = 0; i < data.Count ; i++) { if (Score > data.Score[i]) { scoreIndex = i; break; } } if (scoreIndex > -1) { //New high score found ... do swaps for (int i = data.Count - 1; i > scoreIndex; i--) { data.PlayerName[i] = data.PlayerName[i - 1]; data.Score[i] = data.Score[i - 1]; } data.PlayerName[scoreIndex] = NAME; //Retrieve User Name Here data.Score[scoreIndex] = Score; // Retrieve score here SaveHighScores(data, HighScoresFilename); } } /* Iterate through data if highscore is called and make the string to be saved*/ public string makeHighScoreString() { // Create the data to save HighScoreData data2 = LoadHighScores(HighScoresFilename); // Create scoreBoardString string scoreBoardString = "Highscores:\n\n"; for (int i = 0; i<5;i++) { scoreBoardString = scoreBoardString + data2.PlayerName[i] + "-" + data2.Score[i] + "\n"; } return scoreBoardString; } when ill make this work i will start this code when i call game over (now i start it when i press some buttons, so i could test it faster) public void InputYourName() { if (result == null && !Guide.IsVisible) { string title = "Name"; string description = "Write your name in order to save your Score"; string defaultText = "Nick"; PlayerIndex playerIndex = new PlayerIndex(); result= Guide.BeginShowKeyboardInput(playerIndex, title, description, defaultText, null, null); // NAME = result.ToString(); } if (result != null && result.IsCompleted) { NAME = Guide.EndShowKeyboardInput(result); result = null; inputName = false; SaveHighScore(); } } this where i call output to the screen (ill call this in highscores meniu section when i am done with debugging) spriteBatch.DrawString(Font1, "" + makeHighScoreString(),new Vector2(500,200), Color.White); }

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• SDL side-scroller scrolls inconsistantly

  - by SDLFunTimes

  So I'm working on an upgrade from my previous project (that I posted here for code review) this time implementing a repeating background (like what is used on cartoons) so that SDL doesn't have to load really big images for a level. There's a strange inconsistency in the program, however: the first time the user scrolls all the way to the right 2 less panels are shown than is specified. Going backwards (left) the correct number of panels is shown (that is the panels repeat the number of times specified in the code). After that it appears that going right again (once all the way at the left) the correct number of panels is shown and same going backwards. Here's some selected code and here's a .zip of all my code constructor: Game::Game(SDL_Event* event, SDL_Surface* scr, int level_w, int w, int h, int bpp) { this->event = event; this->bpp = bpp; level_width = level_w; screen = scr; w_width = w; w_height = h; //load images and set rects background = format_surface("background.jpg"); person = format_surface("person.png"); background_rect_left = background->clip_rect; background_rect_right = background->clip_rect; current_background_piece = 1; //we are displaying the first clip rect_in_view = &background_rect_right; other_rect = &background_rect_left; person_rect = person->clip_rect; background_rect_left.x = 0; background_rect_left.y = 0; background_rect_right.x = background->w; background_rect_right.y = 0; person_rect.y = background_rect_left.h - person_rect.h; person_rect.x = 0; } and here's the move method which is probably causing all the trouble: void Game::move(SDLKey direction) { if(direction == SDLK_RIGHT) { if(move_screen(direction)) { if(!background_reached_right()) { //move background right background_rect_left.x += movement_increment; background_rect_right.x += movement_increment; if(rect_in_view->x >= 0) { //move the other rect in to fill the empty space SDL_Rect* temp; other_rect->x = -w_width + rect_in_view->x; temp = rect_in_view; rect_in_view = other_rect; other_rect = temp; current_background_piece++; std::cout << current_background_piece << std::endl; } if(background_overshoots_right()) { //sees if this next blit is past the surface //this is used only for re-aligning the rects when //the end of the screen is reached background_rect_left.x = 0; background_rect_right.x = w_width; } } } else { //move the person instead person_rect.x += movement_increment; if(get_person_right_side() > w_width) { //person went too far right person_rect.x = w_width - person_rect.w; } } } else if(direction == SDLK_LEFT) { if(move_screen(direction)) { if(!background_reached_left()) { //moves background left background_rect_left.x -= movement_increment; background_rect_right.x -= movement_increment; if(rect_in_view->x <= -w_width) { //swap the rect in view SDL_Rect* temp; rect_in_view->x = w_width; temp = rect_in_view; rect_in_view = other_rect; other_rect = temp; current_background_piece--; std::cout << current_background_piece << std::endl; } if(background_overshoots_left()) { background_rect_left.x = 0; background_rect_right.x = w_width; } } } else { //move the person instead person_rect.x -= movement_increment; if(person_rect.x < 0) { //person went too far left person_rect.x = 0; } } } } without the rest of the code this doesn't make too much sense. Since there is too much of it I'll upload it here for testing. Anyway does anyone know how I could fix this inconsistency?

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• Java 2D Game Frameworks

  - by Software Monkey

  I have been looking at frameworks for writing 2D games in Java - part of a growing desire to rediscover my roots in writing those simple but addictive video games. I have googled and found some possibilities, but it's hard to judge which is best without investing significant time in each. Does anyone out there have any recommendations from experience, preferably with a list of pro's and con's for the framework. NOTE: I am not looking so much for comparisons between frameworks but, rather, feedback on any given framework from actually having used it firsthand, or knowing someone who has. The other possibility I am considering is rolling my own, but would rather not. EDIT: I am targeting Java on the Desktop, and expect capable machines, though not state of the art. Some of the 2D engines I have found: Free PulpCore (License: BSD) Slick2D (License: BSD) GTGE - Golden T Game Engine JGame GAGE - Genuine Advantage Gaming Engine GameFrame for Java Basilisk (2D and 3D) Free for non-commercial use Genuts EasyWay - a high-level 2D engine

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• Design: an array of "enemy" objects for game AI

  - by Meko

  Hi..I made shoot em up like game.But I have only one ememy which fallows me on screen.But I want to make lots of enemys like each 10 second they will across on screen together 5 or 10 enemys. ArrayList<Enemies> enemy = new ArrayList<Enemies>(); for (Enemies e : enemy) { e.draw(g); } is it good creating array list and then showing on screen? And Do I have to make some planing movements thoose enemies in my code ? I want that they vill appear not on same pozition.Like First 5 enemies will come top of screen then the other 5 or 10 enemies will come from left side.. so on.What is best solution for this?

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• Social Game Mechanics in Django

  - by oliland

  I want users to receive 'points' for completing various tasks in my application - ranging from tasks such as tagging objects to making friends. I havn't yet found a Django application that simplifies this. At the moment I'm thinking that the best way to accumulate points is that each user action creates the equivalent of a "stream item", and the points are calculated through counting the value of each action published to their stream. Obviously social game mechanics is a huge area with a lot of research going on at the moment. But from a development perspective what's the easiest way to get started? Am I on the wrong track or are there better / simpler ways?

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• why do game engines prefer static libraries over dynamic link libraries

  - by numerical25

  I've been reading a few gaming books. And they always prefer to create the engine as a static library over dynamic link. I am new to c++ so I am not highly knowledge when it comes to static libraries and dynamic link libraries. All I know is static libraries increase the size of your program, where DLL link libraries are loaded as you need them within your program. [edit] I've played games where it almost seemed they used DLL's to load in sound, lighting, and what not all individually. as the level was loading up. cause you don't necessarily need that when your at the game menu.

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• Speed improvements for Perl's chameneos-redux in the Computer Language Benchmarks Game

  - by Robert P

  Ever looked at the Computer Language Benchmarks Game (formerly known as the Great Language Shootout)? Perl has some pretty healthy competition there at the moment. It also occurs to me that there's probably some places that Perl's scores could be improved. The biggest one is in the chameneos-redux script right now—the Perl version runs the worst out of any language: 1,626 times slower than the C baseline solution! There are some restrictions on how the programs can be made and optimized, and there is Perl's interpreted runtime penalty, but 1,626 times? There's got to be something that can get the runtime of this program way down. Taking a look at the source code and the challenge, how can the speed be improved?

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• Speed improvements for Perl's chameneos-redux script in the Computer Language Benchmarks Game

  - by Robert P

  Ever looked at the Computer Language Benchmarks Game, (formerly known as the Great Language Shootout)? Perl has some pretty healthy competition there at the moment. It also occurs to me that there's probably some places that Perl's scores could be improved. The biggest one is in the chameneos-redux script right now - the Perl version runs the worst out of any language : 1,626 times slower than the C baseline solution! There are some restrictions on how the programs can be made and optimized, and there is Perl's interpreted runtime penalty, but 1,626 times? There's got to be something that can get the runtime of this program way down. Taking a look at the source code and the challenge, what do you think could be done to reduce this runtime speed?

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• starting flash game development

  - by wefwgeweg

  where to begin ? i want to create multiplayer flash games using Union (any experience?) but which IDE and prerequisites do i need to begin ? also, what does Flex mean ? thank you. p.s. what is the best way to purchase Game assets ? ex) 2d sprites...i've given up trying to design my own. i need to outsource (any dedicated place for finding offshore artists?) or buy some package.

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• Algorithm - Pick the best combination of Armor (for a game)

  - by Chu

  I'm designing a piece of a game where the AI needs to determine which combination of armor will give the best overall stat bonus to the character. Each character will have about 10 stats, of which only 3-4 are important, and of those important ones, a few will be more important than the others. Armor will also give a boost to 1 or all stats. For example, a shirt might give +4 to the character's int and +2 stamina while at the same time, a pair of pants may have +7 strength and nothing else. So let's say that a character has a healthy choice of armor to use (5 pairs of pants, 5 pairs of gloves, etc.) We've designated that Int and Perception are the most important stats for this character. How could I write an algorithm that would determine which combination of armor and items would result in the highest of any given stat (say in this example Int and Perception)?

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• Keyboard input for a game in Java

  - by hmp

  I'm writing a game in Java, right now it's Swing + JOGL - a JFrame with a GLCanvas. I handle input using keyPressed etc. events (jframe.addKeyListener(...)) and it doesn't seem to work properly: when I have 3+ keys down at the same time, they don't register properly after the window loses, then regains focus, input stops working completely... What am I doing wrong? Is there a better way of handling keyboard input in Java? (I'd rather not switch to another library, like LWJGL... unless I have no choice).

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• Having an online highscore leaderboard for a Flash game

  - by Marco Fox

  Why, hello there. I'm trying to develop a simple Flash game using Actionscript 2 (I know its a bit dated, but its a simple project that doesen't benefict much from AS3), and I came up with an ideia of implementing an online leaderboard that records and shows the highscore of the player. This isn't anything too complicated, but I seem to be having problem finding resources online that explain how I should implement this. All I want is a call, probably to a PHP/MySQL database that records the player's name (which will be recorded via a input window) and its current score. It would also have to show the best all time scores, by order. I should remind you that I am working on a Actionscript 2 so Actionscript 3 solutions are probably not going to work. Can anyone out there help me out here? Did any of you already been through this?

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• Most efficient way to save tile data of an isometric game

  - by Harmen

  Hello, I'm working on an isometric game for fast browsers that support <canvas>, which is great fun. To save information of each tile, I use a two-dimensional array which contains numbers representing a tile ID, like: var level = [[1, 1, 1, 2, 1, 0], [0, 1, 1, 2, 0, 1], [0, 1, 1, 2, 1, 1]]; var tiles = [ {name: 'grass', color: 'green'}, {name: 'water', color: 'blue'}, {name: 'forest', color: 'ForestGreen'} ]; So far it works great, but now I want to work with heights and slopes like in this picture: For each tile I need to save it's tile ID, height and information about which corners are turned upward. I came up with a simple idea about a bitwise representation of all four corners, like this: 1011 // top, bottom and left corner turned up My question is: what is the most efficient way to save these three values for each cell? Is it possible to save these three values as one integer?

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• Open Source 2D Game Engine that supports Hexagon Maps for .NET

  - by Fred F.

  Hello, I cannot find a 2D game engine to create hexagon maps for .net. The best I can find is Xconq (http://sourceforge.net/projects/xconq/) and pygame. Does anybody where I can find any? preferrably one like xconq. Thank you for your time and effort. I really apprecate it. Edit: I would like to have feature of a strategic nature. Like adding custom AIs, path finding, etc. Xcong is an engine for turn-based strategy games.

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• Surface Detection in 2d Game?

  - by GamiShini

  I'm working on a 2D Platform game, and I was wondering what's the best (performance-wise) way to implement Surface (Collision) Detection. So far I'm thinking of constructing a list of level objects constructed of a list of lines, and I draw tiles along the lines. ( http://img375.imageshack.us/img375/1704/lines.png ). I'm thinking every object holds the ID of the surface that he walks on, in order to easily manipulate his y position while walking up/downhill. Something like this: //Player/MovableObject class MoveLeft() { this.Position.Y = Helper.GetSurfaceById(this.SurfaceId).GetYWhenXIs(this.Position.X) } So the logic I use to detect "droping/walking on surface" is a simple point (player's lower legs)-touches-line (surface) check (with some safety approximation - let`s say 1-2 pixels over the line). Is this approach OK? I`ve been having difficulty trying to find reading material for this problem, so feel free to drop links/advice.

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• Is OpenGL required for my iPhone game?

  - by Ben X Tan

  On an iPhone: If I am writing a game that has multiple levels, with multiple animations (image sequences), jpg and png (transparent), some full screen and some not, some looped and some played once only. What is the best way of doing it? Each level might have up to 10MB of images. Add on to this music, and video (cut scenes). All 2D graphics, no 3D models. Is OpenGL required? Or can this be achieved with Quartz or Core Animation?

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• Constraints when using WCF for an online multiplayer game

  - by Etan

  I want to build a service oriented game server and client using WCF where users can play card games on different tables after they logged in with an account. I would like to choose WCF due to it's flexibility in exchanging the communication channels. Maybe, a web interface will be added later which can then just use an other channel class. An additional plus is the ability for contexts which could be used to track a user over a whole gaming session. Are there some constraints I should be aware of when using WCF for the communication between the client and the server?

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• Movement in game programming

  - by hanesjw

  This question may have been asked before, but I'm starting to get into game programming on the Android. I'm having a hard time figuring out the best way to move an object. To put it simply, lets say I have a bitmap located on 0,0 and i want to move it across the screen. The obvious way to do it would be to simply increment the X position by one every time the Surface View onDraw method gets called. But what if I wanted to make it move faster? I could increment it by two or three instead of one, but then the movement starts to get really choppy and stupid looking. What is the best way to go about doing this?

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• Game network physics collision

  - by Jonas Byström

  How to simulating two client-controlled vehicles colliding (sensibly) in a typical client/server setup for a network game? I did read this eminent blog post on how to do distributed network physics in general (without traditional client prediction), but this question is specifically on how to handle collisions of owned objects. Example Say client A is 20 ms ahead of server, client B 300 ms ahead of server (counting both latency and maximum jitter). This means that when the two vehicles collide, both clients will see the other as 320 ms behind - in the opposite direction of the velocity of the other vehicle. Head-to-head on a Swedish highway means a difference of 16 meters/17.5 yards! What not to try It is virtually impossible to extrapolate the positions, since I also have very complex vehicles with joints and bodies all over, which in turn have linear and angular positions, velocities and accelerations, not to mention states from user input.

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