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• Legality of similar games

  - by Jamie Taylor

  This is my first question on GD.SE, and I hope it's in the right place. A little background: I'm an amateur (read: not explicitly employed to develop games, but am employed as a software developer) game developer and took a ComSci with Games Development degree. My Question: What is the legal situation/standpoint of creating a copycat title? I know that there are only N number of ways of solving a problem, and N number of ways to design a piece of software. Say that an independent developer designed a copycat game (a Tetris clone in this example) for instance, and decided to use that game to generate income for themselves as well as interest for their other products. Say the developer adds a disclaimer into the software along the lines of "based on , originally released c. by ." Are there any legal problems/grey areas with the developer in this example releasing this game, commercially? Would they run into legal problems? Should the developer in this example expect cease and desist orders or law suit claims from original publishers? Have original publishers been known to, effectively, kill independent projects because they are a little too close to older titles? I know that there was, at least, one attempt by a group of independent developers to remake Sonic the Hedgehog 2 and Sega shut them down. I also know of Sega shutting down development of the independent Streets of Rage Remake. I know that "but it's an old game, your honour," isn't a great legal standpoint when it comes to defending yourself. But, could an independent developer have a law suit filed against them for re-implementing an older title in a new way? I know that there are a lot of copycat versions of the older titles like Tetris available on app stores (and similar services), and that it would be very difficult for a major publisher to shut them all down. Regardless of this, is making a Tetris (or other game) copycat/clone illegal? We were taught lots of different things at University, but we never covered copyright law. I'm presuming that their thought behind it was "IF these students get jobs in games development, they wont need to know anything about the legal side of it, because their employers will have legal departments... presumably" tl;dr Is it illegal to create a clone or copycat of an old title, and make money from it?

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• Mocking successive calls of similar type via sequential mocking

  - by mehfuzh

  In this post , i show how you can benefit from  sequential mocking feature[In JustMock] for setting up expectations with successive calls of same type.  To start let’s first consider the following dummy database and entity class. public class Person {     public virtual string Name { get; set; }     public virtual int Age { get; set; } }   public interface IDataBase {     T Get<T>(); } Now, our test goal is to return different entity for successive calls on IDataBase.Get<T>(). By default, the behavior in JustMock is override , which is similar to other popular mocking tools. By override it means that the tool will consider always the latest user setup. Therefore, the first example will return the latest entity every-time and will fail in line #12: Person person1 = new Person { Age = 30, Name = "Kosev" }; Person person2 = new Person { Age = 80, Name = "Mihail" };   var database = Mock.Create<IDataBase>();   Queue<Person> queue = new Queue<Person>();   Mock.Arrange(() => database.Get<Person>()).Returns(() => queue.Dequeue()); Mock.Arrange(() => database.Get<Person>()).Returns(person2);   // this will fail Assert.Equal(person1.GetHashCode(), database.Get<Person>().GetHashCode());   Assert.Equal(person2.GetHashCode(), database.Get<Person>().GetHashCode()); We can solve it the following way using a Queue and that removes the item from bottom on each call: Person person1 = new Person { Age = 30, Name = "Kosev" }; Person person2 = new Person { Age = 80, Name = "Mihail" };   var database = Mock.Create<IDataBase>();   Queue<Person> queue = new Queue<Person>();   queue.Enqueue(person1); queue.Enqueue(person2);   Mock.Arrange(() => database.Get<Person>()).Returns(queue.Dequeue());   Assert.Equal(person1.GetHashCode(), database.Get<Person>().GetHashCode()); Assert.Equal(person2.GetHashCode(), database.Get<Person>().GetHashCode()); This will ensure that right entity is returned but this is not an elegant solution. So, in JustMock we introduced a  new option that lets you set up your expectations sequentially. Like: Person person1 = new Person { Age = 30, Name = "Kosev" }; Person person2 = new Person { Age = 80, Name = "Mihail" };   var database = Mock.Create<IDataBase>();   Mock.Arrange(() => database.Get<Person>()).Returns(person1).InSequence(); Mock.Arrange(() => database.Get<Person>()).Returns(person2).InSequence();   Assert.Equal(person1.GetHashCode(), database.Get<Person>().GetHashCode()); Assert.Equal(person2.GetHashCode(), database.Get<Person>().GetHashCode()); The  “InSequence” modifier will tell the mocking tool to return the expected result as in the order it is specified by user. The solution though pretty simple and but neat(to me) and way too simpler than using a collection to solve this type of cases. Hope that helps P.S. The example shown in my blog is using interface don’t require a profiler  and you can even use a notepad and build it referencing Telerik.JustMock.dll, run it with GUI tools and it will work. But this feature also applies to concrete methods that includes JM profiler and can be implemented for more complex scenarios.

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• Should Development / Testing / QA / Staging environments be similar?

  - by Walter White

  Hi all, After much time and effort, we're finally using maven to manage our application lifecycle for development. We still unfortunately use ANT to build an EAR before deploying to Test / QA / Staging. My question is, while we made that leap forward, developers are still free to do as they please for testing their code. One issue that we have is half our team is using Tomcat to test on and the other half is using Jetty. I prefer Jetty slightly over Tomcat, but regardless we using WAS for all the other environments. My question is, should we develop on the same application server we're deploying to? We've had numerous bugs come up from these differences in environments. Tomcat, Jetty, and WAS are different under the hood. My opinion is that we all should develop on what we're deploying to production with so we don't have the problem of well, it worked fine on my machine. While I prefer Jetty, I just assume we all work on the same environment even if it means deploying to WAS which is slow and cumbersome. What are your team dynamics like? Our lead developers stepped down from the team and development has been a free for all since then. Walter

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• Shader effect similar to Metro 2033 gasmask

  - by Tim

  I was thinking about effects in games the other day and I was reminded of the Gasmask effect from Metro 2033. Once you put the gasmask on it blurred a bit in the corners and could ice up and even get cracked. I assume that something like that is done using a shader. I have been experimenting a bit with game development, so far mostly playing with existing rendering engines and adding physics support etc. I would like to learn more about this sort of effect. Can someone give me a simple example of a shader that would alter the entire scene like this. Or if not a shader then an idea on how it would be done. Thanks. Edit : Include screenshot of the metro 2033 gasmask effect.

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• Mocking successive calls of similar type via sequential mocking

  In this post , i show how you can benefit from  sequential mocking feature[In JustMock] for setting up expectations with successive calls of same type.  To start lets first consider the following dummy database and entity class. public class Person { public virtual string Name { get; set; } public virtual int Age { get; set; } }   public interface IDataBase { T Get<T>(); } Now, our test goal is to return different entity for successive calls on IDataBase.Get<T>()....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Similar But Not The Same

  - by rickramsey

  A few weeks ago we published an article that explained how to use Oracle Solaris Cluster 3.3 5/11 to provide a virtual, multitiered architecture for Oracle Real Application Cluster (Oracle RAC) 11.2.0.2. We called it ... How to Deploy Oracle RAC on Zone Clusters Welllllll ... we just published another article just like it. Except that it's different. The earlier article was for Oracle RAC 11.2.0.2. This one is for Oracle RAC 11.2.0.3. This one describes how to do the same thing as the earlier one --create an Oracle Solaris Zone cluster, install and configure Oracle Grid Infrastructure and Oracle RAC in the zone cluster, and create an Oracle Solaris Cluster resource for Oracle RAC-- but for version 11.2.0.3 of Oracle RAC. Even though the objective is the same, and the version is only a dot-dot-dot release away, the process is quite different. So we decided to call it: How to Deploy Oracle RAC 11.2.0.3 on Zone Clusters Hope you can keep the different versions clear in your head. If not, let me know, and I'll try to make them easier to distinguish. - Rick Website Newsletter Facebook Twitter

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• URL routing similar to Facebook (related to AJAX and the URL)

  - by Guilherme Cardoso

  In this article i'm gonna show you how i do when i have to update some content with AJAX and i have to change the URL. First, let's see an example to understand it better. If the user is reading a News with Id 1 and he clicked on another News with Id 2, if we update the content with AJAX the user is now reading the News Id 2 but the URL remains the same, for example: http://localhost/News/Read/1 Now let's see another example from Facebook. If i'm reading my profile and i click on Photos, Facebook updates it with AJAX and the URL switch to: http://www.facebook.com/guilhermegeek#!/guilhermegeek?sk=photos If we enter on that URL, it's mapped to: http://www.facebook.com/guilhermegeek?sk=photos The trick here is the parameters that we use after the #!. Those parameters are never sent to the server side, so we handle them on the client side (javascript).In the example of Facebook, he receives my profile name (guilhermegeek) and the action is to read photos. A few time ago i've written an article in my Portuguese blog explaining how to use an alternative to clients with javascript disabled. Like this: <a onclick="javascript:ReadNews(id);" href="#!News/Read/@id/">Title</a> When the user enter the link of that news, my function Read(); fills the News in the page. Then, i add the #!News/Read/@id/ to my URL. It's gonna stay something like this: http://localhost/News/Read/1#!News/Read/2 As i explained before, the News that the user is reading has the Id 2.The next step is to use javascript to check if the URL that the user typed has other News Id, because if we enter on the above URL our controller will get the Id 1 (everything after to the # isn't sent to the server side). $(document).ready(function () {             var h = window.location.hash;             if (h != null) {                 var parts = window.location.href.split('#!');                 if (parts.length > 1) {                     window.location.replace("http://localhost/" + parts[1]);                 }             }    }); It's pretty simple. I'm cutting everything after the #!, then i redirect the user to a new page. So, it's gonna stay:http://localhost/News/Read/2

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• Domains with similar names and legal issues

  - by abel

  I recently purchased one of those domain names like del.icio.us. While registering I found that delicious.com was being used. Argument: I found that delicious.com belonged to the same category as my to-be website. It served premium delicious dishes. Counter Argument: My to-be domain though belonging to the same category, specialized in serving free but delicious dishes or in giving out links(affiliate) to other sites serving premium delicious dishes. Additional Counter Arguments: 1.delicious.com was not in English. 2.the del.icio.us in my domain name though having the same spelling, is not going to be used in the same fashion. For eg.(this may not make sense, because the names have been changed)the d in delicious on my website actually stands for the greek letter Delta(?/d) and since internationalized domains are still not easily typable, I am going for the english equivalent.The prefix holds importance for the theme of the service which my website intends to offer. My Question: Can I use the domain name del.icio.us for my website? How are these kinds of matters dealt? (The domain names used are fictitious. And I have already registered the domain but have not started using it.I chanced upon this domain name because it was short, easy to remember and suited the theme of my website.)

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• Domains with similar names and issues

  - by abel

  I recently purchased one of those domain names like del.ico.us. While registering I found that delicious.com was being used. Argument: I found that delicious.com belonged to the same category as my to-be website. It served premium delicious dishes. Counter Argument: My to-be domain though belonging to the same category, specialized in serving free but delicious dishes or in giving out links(affiliate) to other sites serving premium delicious dishes. Additional Counter Arguments: 1.delicious.com was not in English. 2.the del.icio.us in my domain name though having the same spelling, is not going to be used in the same fashion. For eg.(this may not make sense, because the names have been changed)the d in delicious on my website actually stands for the greek letter Delta(?/d) and since internationalized domains are still not easily typable, I am going for the english equivalent.The prefix holds importance for the theme of the service which my website intends to offer. My Question: Can I use the domain name del.icio.us for my website? How are these kinds of matters dealt? (The domain names used are fictitious. And I have already registered the domain but have not started using it.I chanced upon this domain name because it was short, easy to remember and suited the theme of my website.)

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• Is there any negative impact with similar page titles and descriptions on similar sites?

  - by ElHaix

  Currently we have Canadian versions of some websites. We are going to create some American versions, which essentially have everything the same, except the search results are geo-specific to the USA. The format for the results page title and descriptions will remain the same, ie {0} in {1} | Find more {0} etc etc etc... {1}. The search term will most-likely be the same between both sites. Will the relative similarity in the page titles and descriptions between the CDN and USA sites have any negative SEO impact, where the geo location would be the most significant difference?

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• designing classes with similar goal but widely different decisional core

  - by Stefano Borini

  I am puzzled on how to model this situation. Suppose you have an algorithm operating in a loop. At every loop, a procedure P must take place, whose role is to modify an input data I into an output data O, such that O = P(I). In reality, there are different flavors of P, say P1, P2, P3 and so on. The choice of which P to run is user dependent, but all P have the same finality, produce O from I. This called well for a base class PBase with a method PBase::apply, with specific reimplementations of P1::apply(I), P2::apply(I), and P3::apply(I). The actual P class gets instantiated in a factory method, and the loop stays simple. Now, I have a case of P4 which follows the same principle, but this time needs additional data from the loop (such as the current iteration, and the average value of O during the previous iterations). How would you redesign for this case?

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• Problems hiring someone on elance or similar sites

  - by akim

  I am assigned to hire some developers/designers in these kind of sites, and I'm looking for war stories about problems with this strategy. All I found so far are tips about getting more jobs as a freelancer, but nothing about being in the other side. We need a web designer and maybe a web programer for a internal and small site, but really important with a very short deadline. Any thoughts about? Does it worth to hire someone? Or we should work extra hour and get this done by ourselves?

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• Custom ecommerce solution (similar to newegg.com) price [closed]

  - by Andrew

  I am wondering, how much would it cost me to hire a team of developers who could make improved clone of newegg.com ecommerce solution together with the back end? Please give comments based on your experience and realistic measures. Comments like "hire team of freelancers from India -they will do it for $1,000" are not welcome. I am talking about using realistic, quality and proven developers. Maybe good advise on how to approach ecommerce development? Thank you

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• Energy saving with two batteries (Gigabyte S1080 and similar)

  - by user37155

  my today question is: how do I manage a tablet (Gigabyte 1080) with an additional battery in Ubuntu ? The control bar shows two separate batteries but starts to suck all the energy from the secundary battery, not leaving any power in it and ruining it (if I don't remove it earlier), and then starts with the primary battery. Here you find a description of the secundary battery: http://www.gigabyte.com/products/product-page.aspx?pid=3837#kf Do you have some solutions for a more confortable use of te device, with windows-like drivers maybe ? Is there a graphical tool to manage two batteries in Linux, in order not to ruin them, and possibly to save energy with them ? Many thanks and greetings, Francesco

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• One codebase - lots of hosted services (similar to a basecamp style service) - planning structure

  - by RickM

  We have built a service (PHP Based) for a client, and are now looking to offer it to other clients as a hosted service. For this example, think of it like a hosted forum service, where a client signs up on our site, and is given a subdomain or can use their own domain, and the code picks up the domain, checks it against a 'master' users table, and then loads the content as needed. I'm trying to work out the best way of handling multiple clients. At the moment I can only think of two options that would work: Option 1 - Have 1 set of database tables, but on each table have a column called 'siteid' - this would mean every query has to check the siteid. This would effectively work with just 1 codebase, and 1 database. Option 2 - Have 1 'master' database with all the core stuff such as the client details and their domain. Then when the systen checks the domain, it pulls the clients database details (username/password/dbname) from a table, and loads a second database. The issue here is security of the mysql server details, however it does have the benefit that they are running their own database instead of sharing one. Which option would I be better taking here, and why? Ideally I want it to be fairly easy to convert the 'standalone' script to the 'multi-domain' script as we're on a tight deadline.

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• Good design for class with similar constructors

  - by RustyTheBoyRobot

  I was reading this question and thought that good points were made, but most of the solutions involved renaming one of the methods. I am refactoring some poorly written code and I've run into this situation: public class Entity { public Entity(String uniqueIdentifier, boolean isSerialNumber) { if (isSerialNumber) { this.serialNumber = uniqueIdentifier; //Lookup other data } else { this.primaryKey = uniqueIdentifier; // Lookup other data with different query } } } The obvious design flaw is that someone needed two different ways to create the object, but couldn't overload the constructor since both identifiers were of the same type (String). Thus they added a flag to differentiate. So, my question is this: when this situation arises, what are good designs for differentiating between these two ways of instantiating an object? My First Thoughts You could create two different static methods to create your object. The method names could be different. This is weak because static methods don't get inherited. You could create different objects to force the types to be different (i.e., make a PrimaryKey class and a SerialNumber class). I like this because it seems to be a better design, but it also is a pain to refactor if serialNumber is a String everywhere else.

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• Implementing lighting similar as in CubeWorld

  - by Phito

  I am currently writing a voxel engine and my goal is to achieve something looking like CubeWorld. The problem that I am encountering is about lighting. I don't have a lot of knowledge in OpenGL but I don't think lighting in a game like that should be done with glLight. But beside that I have no idea of how to implement it. Here's what I have for the moment (with glLight): Do you have any ideas/link that could give me an idea of how to achieve that? Thanks

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• Software architecture for two similar classes which require different input parameters for the same method

  - by I Like to Code

  I am writing code to simulate a supply chain. The supply chain can be simulated in either an intermediate stocking or a cross-docking configuration. So, I wrote two simulator objects IstockSimulator and XdockSimulator. Since the two objects share certain behaviors (e.g. making shipments, demand arriving), I wrote an abstract simulator object AbstractSimulator which is a parent class of the two simulator objects. The abstract simulator object has a method runSimulation() which takes an input parameter of class SimulationParameters. Up till now, the simulation parameters only contains fields that are common to both simulator objects, such as randomSeed, simulationStartPeriod and simulationEndPeriod. However, I now want to include fields that are specific to the type of simulation that is being run, i.e. an IstockSimulationParameters class for an intermediate stocking simulation, and a XdockSimulationParameters class for a cross-docking simulation. My current idea is take the method runSimulation() out of the AbstractSimulator class, but to put a runSimulation(IstockSimulationParameters) method in the IstockSimulator class, and a runSimulation(XdockSimulationParameters) method in the IstockSimulator class. I am worried however, that this approach will lead to code duplication. What should I do?

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• Identical spam coming from many different (but similar) IP addresses

  - by DisgruntledGoat

  A forum I run has been the victim of spam user accounts recently - several accounts that have been registered and the profile fill with advertising/links. All of this is for the same company, or group of companies. I deleted several accounts weeks ago and blocked some IP addresses, but today they have come back with the same spam. Every account has a different IP address, but they are all of the form 122.179.*.* or 122.169.*.*. I am considering blocking those two IP ranges, but there are potentially thousands of IPs in that range. They appear to be assigned to India (although the spam is for an American company) so given the site is for a western, English-speaking audience maybe it doesn't matter. My questions: How are they posting on so many IPs? Is there likely to be a limit to the number of IPs they have access to? Is there anything else I can do at the IP-level to block them? (I am looking into other measures like blocking usernames/links.)

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• Using gerrit (or similar tool) on a team where multiple devs work on a single feature

  - by Bacon

  We have a team of roughly ~8 devs who regularly work on the same feature over the course of a 3 week sprint. It isn't quite pair programming, but in our current workflow devs regularly push up incomplete code for a colleague to complete. This worked fine before we introduced Gerrit, but now our commits need to represent chunks of test-passing, complete, logical functionality, and so the model breaks. My only idea is to have everybody push up to a separate, untracked branch up until the functionality is ready for review, then squash everything into commits that make sense and push up. Is there another Gerrit-ized workflow that could work? I know this is a widely discussed topic on Google Groups, and that there has recently been some discussion of Gerrit topic reviews, but I wanted to see if there is anybody out there using Gerrit in this way, and what the suggested workflow would be.

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• Create many similar classes, or just one

  - by soandos

  The goal is to create an application that has objects that can represent some operations (add, subtract, etc). All of those objects will have common functions and members, and thus will either implement an interface or inherit from an abstract class (Which would be better practice, this will be in C# if that matters?). As far as I can see, there are two different ways of organizing all of these classes. I could create an addition class, a subtraction class, etc. This has the upside of being highly modular but the difference between classes is so minimal. I could create one class, and have a member that will say what type of operation is being represented. This means lots of switch statements, and losing some modularity, in addition to being harder to maintain. Which is is better practice? Is there a better way of doing that is not listed above? If it matters, the list of functions that should be supported is long.

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• Damageable ground similar to pocket tanks or archanists [closed]

  - by XenElement

  Possible Duplicate: Implementing a 2D destructible landscape (like Worms) A really cool feature in both the iPhone game pocket tanks and the online jagex game archanists is ground which can be blown up. When a projectile collides with the ground, an area equal to the blast radius which overlaps the ground is removed. It's strictly two dimensional, but it makes the experience that much more dynamic since you can dig a hole under your opponents or yourself. How is this implemented?

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• Writing a spell checker similar to "did you mean"

  - by user888734

  I'm hoping to write a spellchecker for search queries in a web application - not unlike Google's "Did you mean?" The algorithm will be loosely based on this: http://catalog.ldc.upenn.edu/LDC2006T13 In short, it generates correction candidates and scores them on how often they appear (along with adjacent words in the search query) in an enormous dataset of known n-grams - Google Web 1T - which contains well over 1 billion 5-grams. I'm not using the Web 1T dataset, but building my n-gram sets from my own documents - about 200k docs, and I'm estimating tens or hundreds of millions of n-grams will be generated. This kind of process is pushing the limits of my understanding of basic computing performance - can I simply load my n-grams into memory in a hashtable or dictionary when the app starts? Is the only limiting factor the amount of memory on the machine? Or am I barking up the wrong tree? Perhaps putting all my n-grams in a graph database with some sort of tree query optimisation? Could that ever be fast enough?

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• Page views in Google Analytics are off compared to a similar metric

  - by tiki16

  We have a page where a user can sign a pledge to recycle by clicking a pledge button. A script writes it to a text file which updates the number on the page. In the past 2 days there have been 185 pledges signed but only 63 page views in GA. I trust that they are unique pledges and not just people adding multiple fake names and entering it. Is there anyway to get a better report from Google Analytics?

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• Page views in Google Analitics are off compared to a similar metric

  - by tiki16

  We have a page where a user can sign a pledge to recycle by clicking a pledge button. A script writes it to a text file which updates the number on the page. In the past 2 days there have been 185 pledges signed but only 63 page views in GA. I trust that they are unique pledges and not just people adding multiple fake names and entering it. Is there anyway to get a better report from Google Analytics?

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