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Real-Time Strategy Gameplay

- by Ahmad Alkhawaja

I am working on building a HTML5 RTS game, and my current state is that I am building the Campaign mode of the game, and want to define the gameplay (The Scoring, Unit Behaviors/Attributes). I am searching for links/articles/books about how to define the gameplay, for me this: The scoring Figuring out levels of control (in any RTS game, there is units, individuals and squads) Unit action/attributes/properties point timing (how long it will take to play?) Achievements ..etc I want to see how they usually define these areas in RTS games, I expect to see general document discussing this concept that I can use to build the gameplay. Any idea? Is my question clear or I need to provide more details?

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Moving camera, or camera with discrete "screens"?

- by Jacob Millward

I'm making a game with a friend, but having trouble deciding on a camera style. The basic idea for the game, is having a randomly generated 2-dimensional world, with settlements in it. These settlements would have access to different resources, and it would be the job of the player to create bridges and ladders and links between these villages so they can trade. The player would advance personally by getting better gear, fighting monsters and looking for materials in the world, in order to craft and trade them at the settlements. My friend wants to use an old-style camera, where the world is split into a discrete number of screens that the player moves between. Similar to early Zelda dungeons, or Knytt Stories. This is opposite to me, as I want a standard camera that follows the player around as I feel the split-screen style camera limits the game. Can anyone argue the case either way? We've hit a massive roadblock here and can't seem to get past it.

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Where to start learning OpenGL with C++?

- by NERDcustard

I'm 16 years old and my name is Norbert. I have learnt C++ and made some cool text based games and such but I would love to start graphic's programming. I'm a decent artiest (I will have some of my work bellow) I know the base of C++ but I really would like to get into OpenGL. I need someone to show me some good tutorials for OpenGl with C++ so I can really get into game dev. My goal is to be able to program a simple 2d game by the end of the year and I have lots of time to do so. I'm en-rolled in a game dev next year and really need some help with starting off. http://imgur.com/QZjKX http://imgur.com/3CZy7

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What makes puzzle games addictive?

- by Bryan Denny

I'm currently developing a puzzle game for Android that is sort of along the lines of Alchemy. I was wondering what makes games like Alchemy or Bejeweled so addicting? How do I keep players interested in the game to want to play it over and over? Is it the scores? Level advancement? The challenges? What should I be doing to try and keep a player engaged with a puzzle game since they are often quite repetitive?

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Getting to math applications gradually

- by den-javamaniac

I'm currently getting a formal degree related to computation, in particular my current focus is numerical programming, scientific computing and machine learning. I'd love to apply that knowledge in game dev and expand it with statistics, probability theory, and graph theory (probably even linear algebra). The question is: which spheres of gamedev are filled with such math stuff, is it possible to advance in those without being a part of a group of people and how to get to it gradually? P.S.: I've got experience with commercial java dev and am getting my hands on C/C++ at the moment, however, I'm opened to go ahead and try Unity3D and etc.

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How should I access frame buttons from a controller in an MVC approach?

- by Loris

I'm developing an italian card game using the mvc pattern. I have the class GameFrame that contains the view. The user's card are buttons (JButton objects). I have 3 controllers: GameController: to control the game in general. Contains the game loop. HumanPlayerController: to control the user input ComputerPlayerController: contains the AI of the computer PlayerController: is an interface with the makeTurn() method. It's implemented by HumanP.C. and ComputerP.C. HumanPlayerController implements ActionListener too. But what is the right way to access to the GameFrame buttons? I need it for understand which card was chosen. GameFrame and HumanPlayerController are in different packages. Should i make the JButtons public?

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It is worth planning before jumping in the code?

- by Rushino

I always thought that planning is important for a game. But i don't know at which point. Some are telling me to code instead of planning but i feel like its still important because when you will be in the code you will know what to do next more easily. I am currently working on a game that will have lots of content so i decided to start a design document introducing thoses content and at a side-level i am doing proofs of concept to check if it can be done. Parts of each proofs of concept then could be used later in the real game. EDIT: I am working alone on this project. So my question is : It is worth planning before jumping in the code ? Im still interested to know what others have to say about this. Cause i still get some poeple saying i should code instead of thinking.. so what your opinion on this ?

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XNA Monogame GameState Management not deserilaizing

- by Pectus Excavatum

I am having some trouble serializing/deserializing in a little game I am doing to teach myself monogame. Basically, I am using the gamestatemnanagement resources common to monogame (screen manager etc). Then I am serializing my screen manager component and all associated screens in the OnDeactivated method: protected override void OnDeactivated(Object sender, EventArgs args) { foreach (GameplayScreen screen in mScreenManager.GetScreens()) { DataManager.SaveData(screen.Level.LevelData); } mScreenManager.SerializeState(); } The Save data bit is to do with something else. Then I then override OnActivated to de serialize protected override void OnActivated(Object sender, EventArgs args) { //System.Diagnostics.Debug.WriteLine("here activating"); mScreenManager.DeserializeState(); } However, when this runs it just loads a blank screen - it goes into the game initialize and the game draw method, but doesnt go down into the screens initialize or draw methods. I have no idea why this might be - any help would be greatly appreciated. I am not the only one who has encountered this - I found this post also - https://monogame.codeplex.com/discussions/391117

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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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Where to find current information on quality of released games as software products?

- by Tom

As a gamer, one thing I have learned I need to be savvy about is knowing whether SomeBigGame is actually unstable or otherwise problematic as a piece of software (riddled with invasive DRM products, only runs well on a particular video driver version, crashes on non-English-language systems, etc.). I know that game news media can sometimes be relied upon to report on some problems, but I doubt they bother to cover smaller or indie titles. An example: I've started playing Transformice on Kongregate, and I'm considering installing the downloadable client (it is an online multiplayer game). The part of me that cares about data privacy and maintaining a clean-and-healthy PC wants to know whether there is a place I can check to find out more about a title-as-software than "it is not a literal virus." Put another way: where would you not want to see your game receive lots of attention?

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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 would you solve this graph theory handshake problem in python?

- by Zachary Burt

I graduated college last year with a degree in Psychology, but I also took a lot of math for fun. I recently got the book "Introductory Graph Theory" by Gary Chartrand to brush up on my math and have some fun. Here is an exercise from the book that I'm finding particularly befuddling: Suppose you and your husband attended a party with three other married couples. Several handshakes took place. No one shook hands with himself (or herself) or with his (or her) spouse, and no one shook hands with the same person more than once. After all the handshaking was completed, suppose you asked each person, including your husband, how many hands he or she had shaken. Each person gave a different answer. a) How many hands did you shake? b) How many hands did your husband shake? Now, I've been reasoning about this for a while, and trying to draw sample graphs that could illustrate a solution, but I'm coming up empty-handed. My logic is this: there are 8 different vertices in the graph, and 7 of them have different degrees. The values for the degrees must therefore be 0, 1, 2, 3, 4, 5, 6, and x. The # of degrees for one married couple is (0, 6). Since all graphs have an even number of odd vertices, x must be either 5, 3, or 1. What's your solution to this problem? And, if you could solve it in python, how would you do it? (python is fun.) Cheers.

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How would you solve this graph theory handshake problem in python?

- by Zachary Burt

I graduated college last year with a degree in Psychology, but I also took a lot of math for fun. I recently got the book "Introductory Graph Theory" by Gary Chartrand to brush up on my math and have some fun. Here is an exercise from the book that I'm finding particularly befuddling: Suppose you and your husband attended a party with three other married couples. Several handshakes took place. No one shook hands with himself (or herself) or with his (or her) spouse, and no one shook hands with the same person more than once. After all the handshaking was completed, suppose you asked each person, including your husband, how many hands he or she had shaken. Each person gave a different answer. a) How many hands did you shake? b) How many hands did your husband shake? Now, I've been reasoning about this for a while, and trying to draw sample graphs that could illustrate a solution, but I'm coming up empty-handed. My logic is this: there are 8 different vertices in the graph, and 7 of them have different degrees. The values for the degrees must therefore be 0, 1, 2, 3, 4, 5, 6, and x. The # of degrees for one married couple is (0, 6). Since all graphs have an even number of odd vertices, x must be either 5, 3, or 1. What's your solution to this problem? And, if you could solve it in python, how would you do it? (python is fun.) Cheers.

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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()">  <div id="container">  <div id="banner"> <img src="images/mascot.jpg" width="324" height="112" alt="Mascot" />  <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>  </div>   <div id="content"> <br /> <form> <select id="mySelect"> <option>please make a selection</option> </select> </form> </div>   <div id="footer"> © 2012 Batty League </div>  </div>  </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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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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Game Programming - GUIs

- by Spencer

I've been coding for a while now and would like to start looking into programming games. I know the industry's standard language is C++, for 3D graphics the main choice is between Direct 3D and OpenGL, but what is the most widely used GUI framework? I'm currently on a Mac so if native Windows API is the answer, then what is the cross platform choice? To be clear, I'm not looking for people's favourites but simply what the common or standard game industry's choice is so that I can learn and familiarize myself with it. Thanks, Spencer

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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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