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  • Is it safe to set FPS rate to a constant?

    - by Ozan
    I learned from game class that in update function, every movements must be time dependent for the sake of linearity in movement. We made a simple game. Every move like going left, right or jump is written time dependent. But, in some other computers, our game is worked very differently. For example, our character jumps higher than it should be. I guess this is because each computer has different FPS rate according to its specification. My question is that what should we do to make this game work in same way in every computer? Setting FPS rate to a constant is a solution?

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  • Texture not rendering in correct order in xna 4?

    - by user1090751
    I am making a simple board game. In the game there is a fixed background called myTexture and others are textureGoat and textureTiger whicha are to be placed on top of the background(myTexture). But i am having problem that fourth and fifth component is not displaying however, the sixth component( i.e. myTexture) is appearing. Here is my code, please look at it protected override void Draw(GameTime gameTime) { GraphicsDevice.Clear(Color.Green); // TODO: Add your drawing code here spriteBatch.Begin(SpriteSortMode.BackToFront, BlendState.AlphaBlend); //placing tiger spriteBatch.Draw(textureTiger, new Rectangle(22, 25, 50, 50), Color.White);//first component spriteBatch.Draw(textureTiger, new Rectangle(22, 407, 50, 50), Color.White);//second component spriteBatch.Draw(textureTiger, new Rectangle(422, 25, 50, 50), Color.White);//third component spriteBatch.Draw(textureTiger, new Rectangle(422, 407, 50, 50), Color.White);//fourth component //placing goat spriteBatch.Draw(textureGoat, new Rectangle(125, 110, 50, 50), Color.White);//fifth component //placing background spriteBatch.Draw(myTexture, new Rectangle(0, 0, 500, 500), Color.White);//sixth component spriteBatch.End(); base.Draw(gameTime); }

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  • Do wordpress websites get indexed quicker by SE than a regular website?

    - by guisasso
    I registered a couple of domains with the names of categories of products we sell. I then installed wordpress in one of those domains and played around with it for a bit, and left it alone for about a month. There was a link on my regular website to that secondary website and that website was also registered in google's webmaster tools, but that's that. I then searched on google last week for that product category, and to my surprise, that secondary website showed up in the 2nd or 3rd page on google. Now my question is: Do search engines index wordpress websites quicker? I had given up on using wordpress for that website, since it's so simple, but should i use it, would it give me better results? Thanks in advance for the help, if the question is not deleted.

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  • Can WebGL be used to create a tile-based multi-layer scrolling platform game?

    - by Nicholas Hill
    I've found WebGL (based on OpenGL) to be a fiendish and unforgiving framework for those learning to write HTML5-based games. Despite the presence of many examples on how to get started, I'm really struggling to understand how I could simply load a bunch of images and render them to a canvas quickly using WebGL. My specific scenario involves trying to render a map using a bespoke but simple multi-layered tile engine, where each value in a three dimensional array points to the image to use for that location in the rendered image. Think "Sonic the Hedgehog" via tilesets, tiles, maps, layers, sprites etc. Can anyone enlighten me: 1) How can I load an image that I can use as a texture in WebGL? 2) How can I dynamically select an image at run time and draw it at any co-ordinate, that I also select at run time?

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  • PHP OOP: Am i following right way?

    - by sineverba
    I'm learning OOP (PHP). I've realized my own CRUD Class, that performs some kind of queries SQL. Btw, a Gasoline asked us to realize a smart, simple web-app where he can update prices of his gasoline (gasoline, diesel, lpg) and via an API i could recall them and display in his site. So, I did create a new Class Gasoline but it perform some methods of CRUD Class public function getPrezzoBenzina($id) { $prezzo_benzina = $this->distributore->sql('SELECT prezzo_benzina FROM prezzi WHERE id = '.$id); return $prezzo_benzina } And so on (code is pseudocode, just to explain). I could perform all my code only with help of Crud Class... without necessity of Class Gasoline. So, what I'm missing about OOP? Where am I wrong?

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  • Ouya / Android : button mapping biwise

    - by scorvi
    I am programming a game with the Gameplay3d Engine. But the Android site has no gamepad support and that is what I need to port my game to Ouya. So I implemented a simple gamepad support and it supports 2 gamepads. So my problem is that I put the button stats in a float array for every gamepad. But the Gameplay3d engine saves their stats in a unsigned int _buttons variable. It is set with bitwise operations and I have no clue how to translate my array to this.

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  • Regex to String generation

    - by Mifmif
    Let's say that we have a regex and an index i , if we suppose that the set of string that match our regex are sorted in a lexicographical order, how could we get the i element of this list ? Edit : I added this simple example for more explanation : input : regex="[a-c]{1,2}"; index=4; in this case the ordered list of string that matches this regex contains those elements : a aa ab ac b ba bb bc c ca cb cc output : the 4th element which is ac ps: it's known that the string list that match the regex have infinite element, this doesn't have an impact on the proccess of extracting the element in the given index.

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  • Develop JavaScript API to expose web services [closed]

    - by Apps
    We are planning to develop a JavaScript API to expose some of our J2EE based services. We are doing this keeping Google Maps API in mind. Can someone please suggested where we should start and the approaches that we need to follow to create a useful and extensible JavaScript API? These are the things that we are considering to achieve. It should be very simple for others to use our API. We feel Google Maps API is like that. We should be able to release the updates of the APIs without affecting the existing implementations. We should have enough security measures so that not all can use these services. Please suggest us if there are any books that can guide us through. Any suggestion will be greatly helpful for us. Please let me know if my question is not clear or you need any further information.

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  • Would security be comprimised if I install a gui (e.g. zPanel) for LAMP?

    - by Kirk
    I am an Ubuntu/Linux noob. There are many questions I have regarding the use of my system as a server. First and foremost is security. I want to install a simple GUI (zPanel appears the most user friendly) that will allow others to log into the server and database with ease, similar to a hosting service, though my intent is for the development of one site. Upon looking at the instructions of numerous GUI's, they require installation as root. This makes me uneasy, as my thoughts spiral to the possibilities of the developers creating the elusive 'back-door', thereby giving them root access to my entire system. Am I just being paranoid or is that theoretically possible? If it is possible, what steps are necessary to ensure security?

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  • Getting data from a webpage in a stable and efficient way

    - by Mike Heremans
    Recently I've learned that using a regex to parse the HTML of a website to get the data you need isn't the best course of action. So my question is simple: What then, is the best / most efficient and a generally stable way to get this data? I should note that: There are no API's There is no other source where I can get the data from (no databases, feeds and such) There is no access to the source files. (Data from public websites) Let's say the data is normal text, displayed in a table in a html page I'm currently using python for my project but a language independent solution/tips would be nice. As a side question: How would you go about it when the webpage is constructed by Ajax calls?

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  • What's a good open source cloud computing software? [closed]

    - by boy
    In particular, the "cloud" computing that I'm referring to is: I'm going to get some Linux servers. Then I have pretty big computing tasks to do every day. So my goal is to be able to run some shell command to request an "instance" (ie, if a server has 4 CPU, then the computing software will configure that server to have 4 instances, assuming all my tasks are single thread). Ideally, then I can run the following command: ./addjobs somebatchfile where somebatch file contains one command per line ./removejobs all ./listalljobs (ie, everything is done in shell. And the "computing software" can return me the hostname that's available in some environment variable, etc) And that's all I needed. I run into OpenStack.. but it seems too complicated for this purpose (ie, it does all the Imagine sharing stuff, etc).. All I want, is something SIMPLE that manages the Linux boxes for me and I'm just going to run shell commands on them... Is there such open source software? Thanks,

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  • Immutable design with an ORM: How are sessions managed?

    - by Programmin Tool
    If I were to make a site with a mutable language like C# and use NHibernate, I would normally approach sessions with the idea of making them as create only when needed and dispose at request end. This has helped with keeping a session for multiple transactions by a user but keep it from staying open too long where the state might be corrupted. In an immutable system, like F#, I would think I shouldn't do this because it supposes that a single session could be updated constantly by any number of inserts/updates/deletes/ect... I'm not against the "using" solution since I would think that connecting pooling will help cut down on the cost of connecting every time, but I don't know if all database systems do connection pooling. It just seems like there should be a better way that doesn't compromise the immutability goal. Should I just do a simple "using" block per transaction or is there a better pattern for this?

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  • What is the traditional way to maintain extensibility in a database-driven application like this?

    - by Jsess
    I'm working on a simple application for a game in Java that allows a user to record whether they have collected a given item and how much experience it contains. This will work for multiple item types (weapons, armor) and each will have its own tab with a list of all items that qualify under it. Making changes as new types are added is not such a big deal (if a clothing slot is added, for instance), but new items are added to the game all the time in biweekly patches, and I'm not sure what the traditional/customary way to make sure the application is user-extensible without requiring me to would be. Whether that would be adding a configuration menu that allows users to add news items (new rows to the local SQLite database) or a text file with something similar, but I'm certain there's a well-accepted way to do this that I'm not aware of. I'm new to databases and ignorant of the solution, so what's the professional/futureproof way to do this?

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  • The sign of a true manager is delegation (C# style)

    - by MarkPearl
    Today I thought I would write a bit about delegates in C#. Up till recently I have managed to side step any real understanding of what delegates do and why they are useful – I mean, I know roughly what they do and have used them a lot, but I have never really got down dirty with them and mucked about. Recently however with my renewed interest in Silverlight delegates came up again as a possible solution to a particular problem, and suddenly I found myself opening a bland little console application to just see exactly how far I could take delegates with my limited knowledge. So, let’s first look at the MSDN definition of delegates… A delegate declaration defines a reference type that can be used to encapsulate a method with a specific signature. A delegate instance encapsulates a static or an instance method. Delegates are roughly similar to function pointers in C++; however, delegates are type-safe and secure. Well, don’t you love MSDN for such a useful definition. I must give it credit though… later on it really explains it a bit better by saying “A delegate lets you pass a function as a parameter. The type safety of delegates requires the function you pass as a delegate to have the same signature as the delegate declaration.” A little more reading up on delegates mentions that delegates are similar to interfaces in that they enable the separation of specification and implementation. A delegate declares a single method, while an interface declares a group of methods. So enough reading - lets look at some code and see a basic example of a delegate… Let’s assume we have a console application with a simple delegate declared called AdjustValue like below… class Program { private delegate int AdjustValue(int val); static void Main(string[] args) { } } In a sense, all we have said is that we will be creating one or more methods that follow the same pattern as AdjustValue – i.e. they will take one input value of type int and return an integer. We could then expand our code to have various methods that match the structure of our delegate AdjustValue (remember the structure is int xxx (int xxx)) class Program { private delegate int AdjustValue(int val); private static int Dbl(int val) { return val * 2; } private static int AlwaysOne(int val) { return 1; } static void Main(string[] args) { } }  Above I have expanded my project to have two methods, one called Dbl and the other AlwaysOne. Dbl always returns double the input val and AlwaysOne always returns 1. I could now declare a variable and assign it to be one of those functions, like the following… class Program { private delegate int AdjustValue(int val); private static int Dbl(int val) { return val * 2; } private static int AlwaysOne(int val) { return 1; } static void Main(string[] args) { AdjustValue myDelegate; myDelegate = Dbl; Console.WriteLine(myDelegate(1).ToString()); Console.ReadLine(); } } In this instance I have declared an instance of the AdjustValue delegate called myDelegate; I have then told myDelegate to point to the method Dbl, and then called myDelegate(1). What would the result be? Yes, in this instance it would be exactly the same as me calling the following code… static void Main(string[] args) { Console.WriteLine(Dbl(1).ToString()); Console.ReadLine(); }   So why all the extra work for delegates when we could just do what we did above and call the method directly? Well… that separation of specification to implementation comes to mind. So, this all seems pretty simple. Let’s take a slightly more complicated variation to the console application. Assume that my project is the same as the one previously except that my main method is adjusted as follows… static void Main(string[] args) { AdjustValue myDelegate; myDelegate = Dbl; myDelegate = AlwaysOne; Console.WriteLine(myDelegate(1).ToString()); Console.ReadLine(); } What would happen in this scenario? Quite simply “1” would be written to the console, the reason being that myDelegate was last pointing to the AlwaysOne method before it was called. Make sense? In a way, the myDelegate is a variable method that can be swapped and changed when needed. Let’s make the code a little more confusing by using a delegate in the declaration of another delegate as shown below… class Program { private delegate int AdjustValue(InputValue val); private delegate int InputValue(); private static int Dbl(InputValue val) { return val()*2; } private static int GetInputVal() { Console.WriteLine("Enter a whole number : "); return Convert.ToInt32(Console.ReadLine()); } static void Main(string[] args) { AdjustValue myDelegate; myDelegate = Dbl; Console.WriteLine(myDelegate(GetInputVal).ToString()); Console.ReadLine(); } }   Now it gets really interesting because it looks like we have passed a method into a function in the main method by declaring… Console.WriteLine(myDelegate(GetInputVal).ToString()); So, what it the output? Well, try take a guess on what will happen – then copy the code and see if you got it right. Well that brings me to the end of this short explanation of Delegates. Hopefully it made sense!

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  • Disabling IPv6 on a single interface

    - by ijw
    I'm slightly weirded out by the fact that Ubuntu won't process ipv4 DHCP unless you explicitly tell it to, but will happily take ipv6 RAs unless you tell it not to. Is there any way to change the default behaviour to be 'do nothing unless I explicitly turn it on'? (Note to answerers: I'm not looking to globally disable ipv6, or completely turn off autoconf. I'm looking to disable autoconf by default (as in, I don't want ipv6 unless I say so in /etc/network/interfaces, in the same way that I don't just get a v4 address unless I've explicitly turned on dhcp). What's happening is that, for any interface that's up - e.g. has an ipv4 config - a v6 address tends to just turn up on the interface as well, despite the fact that I've not enabled that explicitly. The solutions to date are fine as far as they go, but if I disable v6 or autoconf globally, I can't then re-enable v6 on a per-interface basis with a simple command in /etc/network/interfaces. I'm fairly sure I'm asking for the moon on a stick, mind you.)

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  • iOS 5 New Features vs Android

    - by kerry
    Browsing through the iOS 5 features list, I can’t help but notice a lot of it is catch up. Having owned both an iPhone and an Android for a considerable amount of time, I figured I would jot down my opinions. Notification Center – Completely ripped off from Android but looks good and is a much needed addition iMessage – This is very interesting as most people who would think it’s cool, probably really wouldn’t understand the significance.  Basically, Apple is adding an IM application to iOS.  Now iPhone / iPad users can sit around messaging each other how cool it is like Crackberry users circa 2003.  I guess the only real improvement over MMS is that you can easily setup groups, see when each other are typing, and don’t incur text messaging charges; at the expense of leaving your non-iOS buddies out (who wants to talk to those losers anyways?). Newstand – An app update and not an OS one (Apple typically doesn’t make distinctions).  It all seems like stuff my current Nook stuff will do.  Note: I did look to compare prices but it seems that information is not available without downloading iTunes.  lame. Reminders – TODO lists are ho hum, but the ability to have reminders when you arrive or leave a position is pretty cool. Twitter integration – The fact that the best Apple can come up with is ‘one at a timing’ online service integration is laughable at best. Camera – Can control it from the lock screen.  Now you’ll have tons of pocket lint photos in your iCloud to go along with the wicked shot of that cheetah that just unexpectedly ran by your apartment. Photos – Speaking of iCloud, all of your devices photos will be synced through it.  That’s cool I guess, not sure if Android will do the same. Safari – What?  You haven’t been reading rss feeds on your device this whole time?  Something tells me you aren’t about to start. PC Free – Finely Apple untethers the iPhone.  What took them so long? Game Center – This should be an interesting service.  Attention Apple fanboys immediately forget how they are blatantly copying Microsoft achievements (at least rename them). Wifi Sync – Just couldn’t cut the cord completely could they?  For what it’s worth, the Zune has been doing this for 5 years now. All in all a pretty big update.  Mostly iCloud.  Mostly keeping up the mobile status quo.  As an Android user, I can’t say there is anything I am envious of.

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  • Dynamic content realoding

    - by Kikaimaru
    Is there a relatively simple way to dynamicaly reload content files? (ie: effect files) I know i can do following: Detect change of file Run content pipeline to rebuild that specific file Unload ALL content that was loaded Load All content And use double references to reference content files. Problem is with step 3 (and step 2 isn't that nice too). But i need to unload everything because if i have model Hero.x which references Model.fx effect, and i change Model.fx file, i need to reload Hero.x file which will then call LoadExternalReference on Model.fx. So I guess question is, did someone mange to make this work without rewriting whole ContentManager (and every ContentReader) and tracking calls to LoadExternalReference?

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  • How to configure path or set environment variables for installation?

    - by Orr22
    I'm aiming to install APE in Ubuntu 14.04 LTS, a simple code for pseudopotential generation. I'm having this error message while running ./configure: checking for gsl-config... no checking for GSL - version >= 1.0... no *** The gsl-config script installed by GSL could not be found *** If GSL was installed in PREFIX, make sure PREFIX/bin is in *** your path, or set the GSL_CONFIG environment variable to the *** full path to gsl-config. configure: error: could not find required gsl library I checked and I have the GSL already installed: :~/Programas/ape-2.2.0$ dpkg -l | grep gsl ii libgsl0ldbl 1.16+dfsg-1ubuntu1 i386 GNU Scientific Library (GSL) -- library package So I have the library but the program installation isn't finding it. Any help? Thanks in advance

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  • Inside Red Gate - Be Reasonable!

    - by simonc
    As I discussed in my previous posts, divisions and project teams within Red Gate are allowed a lot of autonomy to manage themselves. It's not just the teams though, there's an awful lot of freedom given to individual employees within the company as well. Reasonableness How Red Gate treats it's employees is embodied in the phrase 'You will be reasonable with us, and we will be reasonable with you'. As an employee, you are trusted to do your job to the best of you ability. There's no one looking over your shoulder, no one clocking you in and out each day. Everyone is working at the company because they want to, and one of the core ideas of Red Gate is that the company exists to 'let people do the best work of their lives'. Everything is geared towards that. To help you do your job, office services and the IT department are there. If you need something to help you work better (a third or fourth monitor, footrests, or a new keyboard) then ask people in Information Systems (IS) or Office Services and you will be given it, no questions asked. Everyone has administrator access to their own machines, and you can install whatever you want on it. If there's a particular bit of software you need, then ask IS and they will buy it. As an example, last year I wanted to replace my main hard drive with an SSD; I had a summer job at school working in a computer repair shop, so knew what to do. I went to IS and asked for 'an SSD, a SATA cable, and a screwdriver'. And I got it there and then, even the screwdriver. Awesome. I screwed it in myself, copied all my main drive files across, and I was good to go. Of course, if you're not happy doing that yourself, then IS will sort it all out for you, no problems. If you need something that the company doesn't have (say, a book off Amazon, or you need some specifications printing off & bound), then everyone has a expense limit of £100 that you can use without any sign-off needed from your managers. If you need a company credit card for whatever reason, then you can get it. This freedom extends to working hours and holiday; you're expected to be in the office 11am-3pm each day, but outside those times you can work whenever you want. If you need a half-day holiday on a days notice, or even the same day, then you'll get it, unless there's a good reason you're needed that day. If you need to work from home for a day or so for whatever reason, then you can. If it's reasonable, then it's allowed. Trust issues? A lot of trust, and a lot of leeway, is given to all the people in Red Gate. Everyone is expected to work hard, do their jobs to the best of their ability, and there will be a minimum of bureaucratic obstacles that stop you doing your work. What happens if you abuse this trust? Well, an example is company trip expenses. You're free to expense what you like; food, drink, transport, etc, but if you expenses are not reasonable, then you will never travel with the company again. Simple as that. Everyone knows when they're abusing the system, so simply don't do it. Along with reasonableness, another phrase used is 'Don't be an a**hole'. If you act like an a**hole, and abuse any of the trust placed in you, even if you're the best tester, salesperson, dev, or manager in the company, then you won't be a part of the company any more. From what I know about other companies, employee trust is highly variable between companies, all the way up to CCTV trained on employee's monitors. As a dev, I want to produce well-written & useful code that solves people's problems. Being able to get whatever I need - install whatever tools I need, get time off when I need to, obtain reference books within a day - all let me do my job, and so let Red Gate help other people do their own jobs through the tools we produce. Plus, I don't think I would like working for a company that doesn't allow admin access to your own machine and blocks Facebook! Cross posted from Simple Talk.

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  • La beta du SDK de Kinect pour Windows est disponible gratuitement pour un usage non commercial

    La beta du SDK de Kinect pour Windows est disponible gratuitement Pour un usage non commercial Mise à jour du 17/06/11, par Hinault Romaric Comme l'avait annoncé Microsoft lors de la conférence MiX 11 de la Las Vegas en avril (lire ci-avant), le SDK de Kinect pour Windows est disponible aujourd'hui en version Beta. Ce SDK permettra aux développeurs de créer des applications pour PC exploitant son capteur de mouvements, de porter les jeux initialement conçus pour la Xbox 360 vers le PC ou appliquer la technologie à d'autres usages. Pour Microsoft, Kinect est en effet « plus qu'une simple plateforme pour les jeux et le ...

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  • Configuring php on Ubuntu server

    - by mk_89
    I have been following this tutorial http://www.howtoforge.com/installing-apache2-with-php5-and-mysql-support-on-ubuntu-12.04-lts-lamp And I have got to the part where I am running a simple test to determine whether php has been installed properly the installation went fine, I installed php5 using the following command apt-get install php5 libapache2-mod-php5 and I then restarted the server. to see whether php5 has been installed I did the following created a file vi /var/www/info.php edited the file <?php phpinfo(); ?> after trying to run it on my server I get a 404 Not Found error. What could be the problem?

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  • Resources for creating a turn-by-turn navigation system

    - by benwad
    I'm trying to create a kind of turn-by-turn satellite navigation system using the iOS SDK. I get the directions from the server and draw them on the map, then I keep getting location updates from the iPhone's GPS chip. Currently I start by finding the nearest turning point then, each time the user comes within a certain distance of the next turning point, a verbal cue is given and the turning point index is incremented. This is a delicate system and I'd like to make it more robust so I can tell when the user is going the wrong direction etc. Basically I'm looking for some literature about turn-by-turn navigation, in terms of tracking the user's progress and whether they're going the right direction. I'd have thought there's a lot of research out there but I can't seem to find anything apart from simple tutorials on how to use a given SDK or directions API. Can anyone direct me to a good run-through of the various techniques used in software such as TomTom or Google Maps Navigation?

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  • Flash site loads slowly

    - by bogdanvursu
    I have a simple html page that embeds an swf, that downloads other xml, swf and image files. The total count of the requests reaches about 90. I am aware that it should take a while until the content is available and I am OK with that. All the needed files are hosted by two different providers in the US: flashxml.net/monochrome-demo.html and u1.flashcomponents.net/samples/8751/index.html From two different countries in Europe, the content shows up a lot later (almost twice as later) from flashxml, than flashcomponents. I've done mtr tests and the ping difference is about 40ms and the flashxml server load is below 1. Do you have any other suggestions as to what should I look at?

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  • How do I access column data in a previous select statement from a sub-query? [closed]

    - by payling
    PROBLEM How do I access column data in a previous select statement from a sub-query? Below is a simple mock up of what I'm attempting to do. Tables used: Quotes, Users QUOTES TABLE qid, (quote id) owner_uid, creator_uid SQL SYNTAX: SELECT q.qid, q.owner_uid, q.creator_uid, owner.fname, owner.lname FROM quotes q, (SELECT u.fname, u.lname FROM users u WHERE u.uid = q.owner_uid) AS owner WHERE q.qid = '#' SUMMARY I want to be able to use the quote table's owner_uid and specify it for the owner table so I can return all the owner info for that particular quote. The problem is, q.owner_uid is not recognized in the owner sub-query. What am I doing wrong?

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  • How can I protect my save data from casual hacking?

    - by Danran
    What options are there for saving game data in a secure manner? I'm interested in solutions specifically tailored for C++. I'm looking for something that is fast and easy to use. I'm only concerned about storing simple information such as Which levels are and are not unlocked The user's score for each level I'm curious again to know what's out there to use, any good libraries to use that give me nice, secure game data files that the average player can't mess with. I just found this here which looks very nice, but it would be great to get some opinions on potential other libraries/options out there.

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