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• What are your Programming Falacies/Myths?

  - by pms1969

  I recently started a new job and as is typical of all jobs, if you've left, you get blamed for everything. Not long after I started there was a change required for an app (web based) that we maintain, and it was quickly pointed out that the actual code for this site had been lost a long time ago, and the only changes we could make to the it were ones that required changes to mark-up [it was a pre-compiled site]. Being new, I needed a little help finding my way around the code, and enlisted the services of one of my colleagues. Made my changes, and then re-enlisted his help to deploy it. While prepping for the deployment (getting the app on the QA server) we discovered that there were actually 2 different, very similarly named, folders in our source repository. It transpired that for the last year or so, mark-up changes had been made to the site directly, and these were the only differences with the code in the slightly incorrectly named folder in source control. So we did have all the code, and can now properly support the site. This put me in mind of a trick we played on a junior programmer once in a previous job, where we told him he couldn't/shouldn't do a certain thing in code as this would likely bring the server to it's knees and cost the company thousands of pounds (a gag that last months :-). And another one in the first programming job I took on - the batch commission run was just going to crash once a month and there was nothing to be done about it, causing a call out, and call out compensation for the on-call guy (a bug I fixed as soon as I became the on-call guy - 2am call outs don't work for me). So I was wondering... What other programming fallacies/myths are out there that are worth sharing?

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• How to optimalize my game calendar in C#?

  - by MartyIX

  Hi, I've implemented a simple calendar (message system) for my game which consists from: 1) List<Event> calendar; 2) public class Event { /// <summary> /// When to process the event /// </summary> public Int64 when; /// <summary> /// Which object should process the event /// </summary> public GameObject who; /// <summary> /// Type of event /// </summary> public EventType what; public int posX; public int posY; public int EventID; } 3) calendar.Add(new Event(...)) The problem with this code is that even thought the number of messages is not excessise per second. It allocates still new memory and GC will once need to take care of that. The garbage collection may lead to a slight lag in my game and therefore I'd like to optimalize my code. My considerations: To change Event class in a structure - but the structure is not entirely small and it takes some time to copy it wherever I need it. Reuse Event object somehow (add queue with used events and when new event is needed I'll just take from this queue). Does anybody has other idea how to solve the problem? Thanks for suggestions!

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• Multi Player game using Nodejs and Socket IO

  - by Kishorevarma

  I am trying out multi player racing game using Node and Socket IO ,express . So I have tried simple example to see the latency between node server and the clients. I have a draggable image in client . when I move the image ienter code heren one client ,it has to move in all clients. so basically when I am moving the image I am sending the image position to the node server in a json format , then from there I am broadcasting to all clients. there is a ~approx 300ms latency from the time. following are the results. Client 1 sending data to server at : 286136 (timestamp) Server received at : 286271 Client2 received data at : 286470 Client3 received data at : 286479 Client4 received data at : 286487 Client5 received data at : 286520 the latency between move from client1 to client5 is 384ms. its too hight for a racing game .. here is my server code. var app = require('express').createServer(); var io = require('socket.io'); var http = require('http'); var http_server = http.createServer(); var server = http.createServer(app); server.listen(3000); var socket = io.listen(server,{ log: false }); socket.sockets.on('connection', function (client) { client.on('message', function (data){ console.log("data arrived to server",new Date().getTime()); // Below both statements are giving same latency between the client 1 and client 5 client.broadcast.emit('message',data); //socket.sockets.emit('message',data); }); }); 1) Is there any way to optimize the server code to reduce the latency? 2) is this expected latency using node and websockets ? 3) is socket io can't broadcast the data asynchronously (I mean at a same time) ? Thanks Kishorevarma

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• How do I slow down a flash game?

  - by dsaccount1

  Basically the objective is to click on certain targets, which upon doing so would destroy the target and garner you points. I've written a macro to help me until the point where its impossible to even see the target more than a mere flicker, (maybe even less than that, i cant see it with my eyes). But its possible because i believe others have done so. (Maybe on slower comps?) Anyway the question is, how would it be possible to slow down the flash game? I've thought of a couple of ways that could work but i'm not sure how to implement them. 1. Slow down the cpu speed? (smth like that? how?) 2. As the game progress the time the targets appear and stay up is reduced. Maybe theres a variable controlling all of this, isit possible to modify the address of this variable? freeze it or smth? Any ideas, suggestions and especially advice would really be appreciated, thanks!

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• How to optimize my game calendar in C#?

  - by MartyIX

  Hi, I've implemented a simple calendar (message system) for my game which consists from: 1) List<Event> calendar; 2) public class Event { /// <summary> /// When to process the event /// </summary> public Int64 when; /// <summary> /// Which object should process the event /// </summary> public GameObject who; /// <summary> /// Type of event /// </summary> public EventType what; public int posX; public int posY; public int EventID; } 3) calendar.Add(new Event(...)) The problem with this code is that even thought the number of messages is not excessise per second. It allocates still new memory and GC will once need to take care of that. The garbage collection may lead to a slight lag in my game and therefore I'd like to optimalize my code. My considerations: To change Event class in a structure - but the structure is not entirely small and it takes some time to copy it wherever I need it. Reuse Event object somehow (add queue with used events and when new event is needed I'll just take from this queue). Does anybody has other idea how to solve the problem? Thanks for suggestions!

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• Cryptography for P2P card game

  - by zephyr

  I'm considering writing a computer adaptation of a semi-popular card game. I'd like to make it function without a central server, and I'm trying to come up with a scheme that will make cheating impossible without having to trust the client. The basic problem as I see it is that each player has a several piles of cards (draw deck, current hand and discard deck). It must be impossible for either player to alter the composition of these piles except when allowed by the game rules (ie drawing or discarding cards), nor should players be able to know what is in their or their oppponent's piles. I feel like there should be some way to use something like public-key cryptography to accomplish this, but I keep finding holes in my schemes. Can anyone suggest a protocol or point me to some resources on this topic? [Edit] Ok, so I've been thinking about this a bit more, and here's an idea I've come up with. If you can poke any holes in it please let me know. At shuffle time, a player has a stack of cards whose value is known to them. They take these values, concatenate a random salt to each, then hash them. They record the salts, and pass the hashes to their opponent. The opponent concatenates a salt of their own, hashes again, then shuffles the hashes and passes the deck back to the original player. I believe at this point, the deck has been randomized and neither player can have any knowledge of the values. However, when a card is drawn, the opponent can reveal their salt, allowing the first player to determine what the original value is, and when the card is played the player reveals their own salt, allowing the opponent to verify the card value.

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• Comparing Apples and Pairs

  - by Tony Davis

  A recent study, High Costs and Negative Value of Pair Programming, by Capers Jones, pulls no punches in its assessment of the costs-to- benefits ratio of pair programming, two programmers working together, at a single computer, rather than separately. He implies that pair programming is a method rushed into production on a wave of enthusiasm for Agile or Extreme Programming, without any real regard for its effectiveness. Despite admitting that his data represented a far from complete study of the economics of pair programming, his conclusions were stark: it was 2.5 times more expensive, resulted in a 15% drop in productivity, and offered no significant quality benefits. The author provides a more scientific analysis than Jon Evans’ Pair Programming Considered Harmful, but the theme is the same. In terms of upfront-coding costs, pair programming is surely more expensive. The claim of productivity loss is dubious and contested by other studies. The third claim, though, did surprise me. The author’s data suggests that if both the pair and the individual programmers employ static code analysis and testing, then there is no measurable difference in the resulting code quality, in terms of defects per function point. In other words, pair programming incurs a massive extra cost for no tangible return in investment. There were, inevitably, many criticisms of his data and his conclusions, a few of which are persuasive. Firstly, that the driver/observer model of pair programming, on which the study bases its findings, is far from the most effective. For example, many find Ping-Pong pairing, based on use of test-driven development, far more productive. Secondly, that it doesn’t distinguish between “expert” and “novice” pair programmers– that is, independently of other programming skills, how skilled was an individual at pair programming. Thirdly, that his measure of quality is too narrow. This point rings true, certainly at Red Gate, where developers don’t pair program all the time, but use the method in short bursts, while tackling a tricky problem and needing a fresh perspective on the best approach, or more in-depth knowledge in a particular domain. All of them argue that pair programming, and collective code ownership, offers significant rewards, if not in terms of immediate “bug reduction”, then in removing the likelihood of single points of failure, and improving the overall quality and longer-term adaptability/maintainability of the design. There is also a massive learning benefit for both participants. One developer told me how he once worked in the same team over consecutive summers, the first time with no pair programming and the second time pair-programming two-thirds of the time, and described the increased rate of learning the second time as “phenomenal”. There are a great many theories on how we should develop software (Scrum, XP, Lean, etc.), but woefully little scientific research in their effectiveness. For a group that spends so much time crunching other people’s data, I wonder if developers spend enough time crunching data about themselves. Capers Jones’ data may be incomplete, but should cause a pause for thought, especially for any large IT departments, supporting commerce and industry, who are considering pair programming. It certainly shouldn’t discourage teams from exploring new ways of developing software, as long as they also think about how to gather hard data to gauge their effectiveness.

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• Serial port game controller (racing pedals)

  - by Cheesegraterr

  I have an old madCatz racing wheel for the playstation 2. The gas and brake pedals are connected to the wheel by a serial port. I just bought a usb racing wheel for the PC but it lacks pedals so I wanted to see if I could get these old madCatz working. I just installed the serial port in my motherboard, but now I have a problem with software. Nothing will recognize the pedal. I was wondering if there are any programs or drivers out there that will allow me to set the pedals up to work. Any advice would be appreciated!

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• Windows 7: Creating a password-protected task (NOT a programming question)

  - by Matthias

  Hello, I would like to configure a task like "child control software", so it would hibernate the pc at certain times. Is it possible to prevent modification (here: pausing) of a task through requiring the entering of the admin password to modify, EVEN THOUGH the currently-logged-in (and only) user is the admin account itself? (Do you know of any child control software that does NOT require an additional account yet is able to hibernate the system at certain times?) Thanks a lot! Matthias

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• raspberry pi for web programming/development

  - by Mark Dee

  I'm into web development and my machine (AMD Phenom II, 8G RAM) is running Ubuntu 13.04. I love my current setup but I kinda miss some of Windows software like MSOffice or Adobe suites, and running on Virtualbox doesn't feel as snappy for me.... So I'm thinking of buying a new cheap machine where I would install Linux and do my development work there and have my current machine run Windows. I just found this thing called Raspberry pi which is really cheap and requires 12v only (I think) which makes it good for downloading stuff overnight. So, does it make sense to buy Raspberry pi, make it my primary dev machine, Windows being the secondary (for Adobe and browser testing of course)? Basically, I want to know if Raspberry pi meets the following requirements: It should run ArchLinux Sublime Text 3 python ruby nginx nodejs Deluge or Transmission (well, maybe just those, no need for videos and music players)

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• Game Server Colocation

  - by Linuz

  Hello, I am new to colocation. I am looking for a good place to host my server that would have around 5-10 Source Servers (Team Fortress 2). I am looking at maybe around 90 players at a time for now, players coming from all over the United States Could I get more info on what I am suppose to look for exactly? Would it be correct for me to get a 100Mb/s line and does 100Mb/s line in the following example actually be 100Mb/s upload bandwidth? Example: package 4 of FDC's services: http://www.fdcservers.net/server_colocation.php also I want to get something unmettered. I do not want to have to ever worry about going over some bandwidth limit or any DDOS attacks killing me. And if anyone has any other recommendations as to what network configurations I should get or any other good colocation providers that are cheap in price, I would REALLY appreciate the help. Thanks

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• IDE for Python GUI programming on Windows?

  - by netvope

  Any suggestions? Can you share your experience?

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• Cinema4D for game development tutorials anyone ?

  - by George Profenza

  Hi, I started to learn Cinema 4D. I've noticed it's really easy to use for motion graphics, but I want to use it for modeling for games/realtime 3d engines. Before I used 3dsmax and it was easy to estimate how a model would look/behave in a 3d engine. The two main things I did was displaying Polygon triangles and displaying the Polygon Count. I've found the Total Polygons tick in HUD settings in Cinema 4D, but I can't find any display mode that will show triangles. Is there there a way to display triangle faces/not quads in Cinema4D ? If so how ? There is a Triangulate function, but I'd rather not Triangulate/Untriangulate all the time, especially since it's converting back and forth between the two doesn't always produce the same result.

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• php programming

  - by HARSHA

  Hi, i am learning php,i downloded the xampp.and Apache server,Mysql are running properly in Xampp Control panel. I tried with a simple program that is hello world,i created a new folder in htdocs, and i saved my program in that new folder with .php extention. But when i run the program then is showing a error as follows ------ Object not found! The requested URL was not found on this server. If you entered the URL manually please check your spelling and try again. If you think this is a server error, please contact the webmaster. Error 404 localhost 18-5-2010 11:51:44 Apache/2.2.14 (Win32) DAV/2 mod_ssl/2.2.14 OpenSSL/0.9.8l mod_autoindex_color PHP/5.3.1 mod_apreq2-20090110/2.7.1 mod_perl/2.0.4 Perl/v5.10.1

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• port forwarding/network settings preventing from game hosting

  - by Xitcod13

  I asked where to post this question on stackoverflow meta and they directed me here. Im on wireless connection and I want to host games in StarCraft: Brood War and i've been looking everywhere on how to accomplish that. My internet is amazingly fast so its not an internet problem (and when i play other peoples games dont experience lag) I found out that i need to have a static IP but I have already checked that i do (i downloaded a program to make my id static and it already was; The program asked for which router I used So i think it checked the router settings already) I found out that i need to allow Sc access through the firewall which i already did (i have zone-alarm but I allowed it everything possible except receiving emails lol) I have recently noticed that few people actually can join my games but most of them cannot. I dont know whats going on here. I really want to be able to host games overall how do I go about checking what is wrong with the network. Update: Alright I figured out what i did wrong in the first part I did not actually set up forwarding on the router -.- I have tried to fix my mistake. I went to forwarding options in my router (as this guide for my specific router suggests) but when i click ok I get a message incorrect ip address. 192.168.1.1 is my routers address. The default address that appears there is 192.168.1 (blank) I have set it to my computers current Ip4 adress which 192.168.1.23 I hope this works If so i will post it as an answer and mark it.

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• computer randomly restarting. both in game and out of game

  - by eric

  first my specs are. AMD Phenom II x4 955 processor 3.2ghz 20gb ddr3 ram 4Gb Nvidia Geforce GTX 770 850w Corsair tx850w psu Gigabyte ud3 mobo Windows 7 professional I recently uprgraded my vid card to gtx770 and upgraded my psu to the 850w thats in it now. i did a reformat with the installation of the new gpu and psu and started fresh and only have a couple programs installed (diablo3, nvidia control panel, wow, and steam). all drivers are up to date and everything is hooked up correctly. the problem is it will randomly shut down. no blue screen. just turns itself straight off and reboots after a couple seconds. occasionally i will have to unplug the power cable from the psu for a few minutes then reconnect and it will start up. it seems pretty random. sometimes it does it when my pc is just sitting there on the home screen. and sometimes it does it during games. and sometimes it doesnt do it for days at a time. i noticed the psu felt hot so i put an extra fan blowing straight onto both the psu and gpu and neither feel overly hot after it shuts down now. could it just be that it is a psu problem. the psu was taken from another machine but wasnt having this problem in that machine. i have seen a few articles online about gtx770 doing the same thing. but i havent found any answers or solutions. any help will be appreciated. im sure the 850w is enough to power my machine, im just stumped and ran out of ideas to fix it. i have even returned the video card for another thinking it might have been an issue with that particular card, but still gettin the same problem.

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• What are the most interesting equivalences arising from the Curry-Howard Isomorphism?

  - by Tom

  I came upon the Curry-Howard Isomorphism relatively late in my programming life, and perhaps this contributes to my being utterly fascinated by it. It implies that for every programming concept there exists a precise analogue in formal logic, and vice versa. Here's an "obvious" list of such analogies, off the top of my head: program/definition | proof type/declaration | proposition inhabited type | theorem function | implication function argument | hypothesis/antecedent function result | conclusion/consequent function application | modus ponens recursion | induction identity function | tautology non-terminating function | absurdity tuple | conjunction (and) disjoint union | exclusive disjunction (xor) parametric polymorphism | universal quantification So, to my question: what are some of the more interesting/obscure implications of this isomorphism? I'm no logician so I'm sure I've only scratched the surface with this list. For example, here are some programming notions for which I'm unaware of pithy names in logic: currying | "((a & b) => c) iff (a => (b => c))" scope | "known theory + hypotheses" And here are some logical concepts which I haven't quite pinned down in programming terms: primitive type? | axiom set of valid programs? | theory ? | disjunction (or)

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• SHLoadImageFile(L"\\Program Files\\TrainingApp\\background.png"); whats that L in the argument for?

  - by ashishsony

  Hi, ive been working on c++ on linux for the past 2 years,and switched to windows c++ programming recently. can anyone tell me what that L is there in the argument of the function: SHLoadImageFile(L"\\Program Files\\TrainingApp\\background.png"); and on viewing certain sample code in MSVS C++ i came across hundereds of typedefs like.. LPARAM// typedef LONG_PTR LPARAM... here LONG_PTR is again typedef as __w64 long WPARAM// typedef UINT_PTR WPARAM... so there is a lot of chained typedefs.. I never saw this much of typedef chaining on c++ programming on linux using gcc.. what i want to say is that it just creates more confusion in this way for windows application programming.. while ive seen application programming on linux using frameworks like Qt.. there such things are rarely used.. so is there specific purpose in typedefining again and again on MSVSC++?? for eg.. there are typdefs like typedef int BOOL; whats the use of this when normal bool is available already..?? there are hundred other cases ive come across where just to decide what data type to use becomes so difficult.. it becomes difficult to understand a pre written code in this fashion too.. Thanks.

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• How to simplify this code or a better design?

  - by Tattat

  I am developing a game, the game have different mode. Easy, Normal, and Difficult. So, I'm thinking about how to store the game mode. My first idea is using number to represent the difficulty. Easy = 0 Normal = 1 Difficult = 2 So, my code will have something like this: switch(gameMode){ case 0: //easy break; case 1: //normal break; case 3: //difficult break; } But I think it have some problems, if I add a new mode, for example, "Extreme", I need to add case 4... ... it seems not a gd design. So, I am thinking making a gameMode object, and different gameMode is sub class of the super class gameMode. The gameMode object is something like this: class GameMode{ int maxEnemyNumber; int maxWeaponNumber; public static GameMode init(){ GameMode gm = GameMode(); gm.maxEnemyNumber = 0; gm.maxWeaponNumber = 0; return gm; } } class EasyMode extends GameMode{ public static GameMode init(){ GameMode gm = super.init(); gm.maxEnemyNumber = 10; gm.maxWeaponNumber = 100; return gm; } } class NormalMode extends GameMode{ public static GameMode init(){ GameMode gm = super.init(); gm.maxEnemyNumber = 20; gm.maxWeaponNumber = 80; return gm; } } But I think it seems too "bulky" to create an object to store gameMode, my "gameMode" only store different variables for game settings.... Is that any simple way to store data only instead of making an Object? thz u.

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• How can i be sure that professional programming is not for me ?

  - by user17766

  Hello everybody I love programming, developing projects for hobby and learning new concepts. I am getting harder too much in current job Despite learnt many thing well. I can even hardly understand assigned tasks. I am asking why i am getting harder to myself. It may not my fault? Our architecture doesn't spend enough time to explain complicated sides of project for us or i am not enough smart one for understand fastly. Our architecture also doesn't know what kind of hell he is creating ? Seeing 3 level generic types and 4-5 level generic inheritance in domain model objects hell makes me think so really. It looks abusing concepts more than reduce complexity. Thinking that he hasn't experienced before such a big project while he is getting confused in problems of the project. May i am not in right company ? May i am not good programmer ? May i am really stupid ? Become good in programming concepts is not enough to deal big project's complications so someone should to tell me that i have to still effort too much even i am good programmer for adopting myself to any big project ? Also i had another bad experiences from previous job but my professional experiences is almost few months but i spend 2 years for learning and coding for fun and i really can say that i have well skills on OOP, Design Patterns, coding standards and deep knowledge in language currently used. Sometimes i am thinking to leave programming professionally and work in any lame job while doing programming just for hobby. Waiting suggestions and insights

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• Is there a resource that explains the benefits of layered programming?

  - by P.Brian.Mackey

  Some developers I know favor what I would call a procedural programming style. I recognize that procedural programming has its uses, albeit not in the business application world of .NET programming. So let's say we have a winform application with a buttonclick event. The buttonclick handles everything from the UI configuration to the database call and data manipulation. So you end up with a method that is 100's of lines of code long. Outside the fact that this code can't be considered test-able for various reasons, this style of programming is fragile to change. I can talk bout OO, Anti-patterns, etc. The problem is that any distinct topic I can dream up requires a great deal of explanation to understand the potential benefits. Outside of finding a new job (lots of businesses program this way), how can I teach these kinds of developers how to write better code? Obviously we can't sit around a round table and discuss pro's and con's all day due to time constraints and real work that has to be done. Although, training and intense training is the only thing I can think of to fix these problems. Not to say I write perfect code, I most certainly do not. I do believe there are certain best practices that should be followed as a rule E.G. OO in the context of .NET. The most common excuse I hear is "we can't write code fast enough if we do it like that".

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• Can One Get a Solid Programming Foundation Without Going To College/University?

  - by Daniel

  First, I have already searched the site and read all the previous "self-taught vs. college" topics. The majority of the answers defended that going to college was the best choice, for two main reasons: Going to college gives you the paper, which is essential to landing jobs, especially in tough economic times. Going to college gives you a solid programming base, teaching you the principles that will be essential regardless of the language/path you take after. Here comes my question: I am not worried about reason 1 at all, because I already have my own company (I build websites/ do affiliate marketing) and a stable financial situation, so I am pretty sure I won't need to look around for a job. I am worried about reason 2 though. That is, I want to make sure I'll have as solid a programming foundation as anyone else out there, and I am wondering if that is possible with self-learning. Suppose I take my time to study the very basics, like discrete maths, algorithm design, programming logic, computer architecture, Assembly, C programming, databases and data structures - mostly using books,online resources and lots of coding. Say I spend 1-2 years covering those basics. Do you think my foundation would be solid, or still lack in comparison to someone who went to college?

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• How handle nifty initialization in a Slick2D state based game?

  - by nathan

  I'm using Slick2D and Nifty GUI. I decided to use a state based approach for my game and since i want to use Nifty GUI, i use the classes NiftyStateBasedGame for the main and NiftyOverlayBasicGameState for the states. As the description say, i'm suppose to initialize the GUI in the method initGameAndGUI on my states, no problem: @Override protected void initGameAndGUI(GameContainer gc, StateBasedGame sbg) throws SlickException { initNifty(gc, sbg) } It works great when i have only one state but if i'm doing a call to initNifty several times from different states, it will raise the following exception: org.bushe.swing.event.EventServiceExistsException: An event service by the name NiftyEventBusalready exists. Perhaps multiple threads tried to create a service about the same time? at org.bushe.swing.event.EventServiceLocator.setEventService(EventServiceLocator.java:123) at de.lessvoid.nifty.Nifty.initalizeEventBus(Nifty.java:221) at de.lessvoid.nifty.Nifty.initialize(Nifty.java:201) at de.lessvoid.nifty.Nifty.<init>(Nifty.java:142) at de.lessvoid.nifty.slick2d.NiftyCarrier.initNifty(NiftyCarrier.java:94) at de.lessvoid.nifty.slick2d.NiftyOverlayBasicGameState.initNifty(NiftyOverlayBasicGameState.java:332) at de.lessvoid.nifty.slick2d.NiftyOverlayBasicGameState.initNifty(NiftyOverlayBasicGameState.java:299) at de.lessvoid.nifty.slick2d.NiftyOverlayBasicGameState.initNifty(NiftyOverlayBasicGameState.java:280) at de.lessvoid.nifty.slick2d.NiftyOverlayBasicGameState.initNifty(NiftyOverlayBasicGameState.java:264) The initializeEventBus that raise the exception is called from the Nifty constructor and a new Nifty object is created within the initNifty method: public void initNifty( final SlickRenderDevice renderDevice, final SlickSoundDevice soundDevice, final SlickInputSystem inputSystem, final TimeProvider timeProvider) { if (isInitialized()) { throw new IllegalStateException("The Nifty-GUI was already initialized. Its illegal to do so twice."); } final InputSystem activeInputSystem; if (relayInputSystem == null) { activeInputSystem = inputSystem; } else { activeInputSystem = relayInputSystem; relayInputSystem.setTargetInputSystem(inputSystem); } nifty = new Nifty(renderDevice, soundDevice, activeInputSystem, timeProvider); } Is this a bug in the nifty for slick2d implementation or am i missing something? How am i supposed to handle nifty initialization over multiple states?

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• How do I apply different probability factors in an algorithm for a cricket simulation game?

  - by Komal Sharma

  I am trying to write the algorithm for a cricket simulation game which generates runs on each ball between 0 to 6. The run rate or runs generated changes when these factors come into play like skill of the batsman, skill of the bowler, target to be chased. Wickets left. If the batsman is skilled more runs will be generated. There will be a mode of play of the batsman aggressive, normal, defensive. If he plays aggressive chances of getting out will be more. If the chasing target is more the run rate should be more. If the overs are final the run rate should be more. I am using java random number function for this. The code so far I've written is public class Cricket { public static void main(String args[]) { int totalRuns=0; //i is the balls bowled for (int i = 1; i <= 60 ; i++) { int RunsPerBall = (int)(Math.random()*6); //System.out.println(Random); totalRuns=totalRuns+RunsPerBall; } System.out.println(totalRuns); } } Can somebody help me how to apply the factors in the code. I believe probability will be used with this. I am not clear how to apply the probability of the factors stated above in the code.

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• Using gluLookAt to move camera in 2D iPhone game ?

  - by Mr.Gando

  Hey guys, I'm trying to use gluLookAt to move the camera in my iPhone game, but every time I've tried to use gluLookAt my screen just goes "blank" ( grey in this case ) I'm trying to render a simple triangle and to move the camera, this is my code: to setup my scene I do: glViewport(0, 0, backingWidth, backingHeight); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glRotatef(-90.0, 0.0, 0.0, 1.0); //using iPhone in horizontal mode glOrthof(-240, 240, -160, 160, -1, 1); glMatrixMode(GL_MODELVIEW); then my "triangle rendering" code looks like: GLfloat triangle[] = {0, 100, 100, 0, -100, 0,}; glClearColor(0.7, 0.7, 0.7, 1.0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glEnableClientState(GL_VERTEX_ARRAY); glColor4f(1.0, 0.0, 0.0, 1.0); glVertexPointer(2, GL_FLOAT, 0, &triangle); glDrawArrays(GL_TRIANGLES, 0, 6); glDisableClientState(GL_VERTEX_ARRAY); This draws a red triangle in the middle of the screen, when I try to apply gluLookAt ( I got the implementation of the function from Cocos2D so I asume it's correct ), i do: glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(0,0,1,0,0,0,0,0,1); // try to move the camera a bit ? GLfloat triangle[] = {0, 100, 100, 0, -100, 0,}; glClearColor(0.7, 0.7, 0.7, 1.0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glEnableClientState(GL_VERTEX_ARRAY); glColor4f(1.0, 0.0, 0.0, 1.0); glVertexPointer(2, GL_FLOAT, 0, &triangle); glDrawArrays(GL_TRIANGLES, 0, 6); glDisableClientState(GL_VERTEX_ARRAY); This leads me to grey screen (glClearColor is grey), I've tried all sort of things and read what I've found about gluLookAt on the net, but no luck :(, if someone could explain me or show me how to move to move the camera in a top-down fashion ( zelda, etc ), I would really appreciate it. Thanks!

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