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• What are the pros/cons of using a 3d engine for 2d games?

  - by mrohlf

  What pros or cons should a beginner be aware of when deciding between a 2d game engine (like Slick2D/Flixel/FlashPunk) and a 3d engine (like Unity) for 2d game development? I am just getting started in indie game development, though I have dabbled a bit with Game Maker, Flash, and XNA in the past. I've heard a lot of positive things about Unity, and its cross-platform nature makes it appealing, but as I understand, it's a 3d engine at its core. For a strictly 2d game, are there any compelling reasons to work with a 3d engine like Unity? Or would it just add unneeded complexity to my initial learning experience?

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• Wall avoidance steering

  - by Vodemki

  I making a small steering simulator using the reynolds boid algorythm. Now I want to add a wall avoidance feature. My walls are in 3D and defined using two points like that: ---------. P2 | | P1 .--------- My agents have a velocity, a position, etc... Could you tell me how to make avoidance with my agents ? Vector2D ReynoldsSteeringModel::repulsionFromWalls() { Vector2D force; vector<Wall *> wallsList = walls(); Point2D pos = self()->position(); Vector2D velocity = self()->velocity(); for (unsigned i=0; i<wallsList.size(); i++) { //TODO } return force; } Then I use all the forces returned by my boid functions and I apply it to my agent. I just need to know how to do that with my walls ? Thanks for your help.

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• Audio libraries for PC indie games [closed]

  - by bluescrn

  Possible Duplicate: Cross-Platform Audio API Suggestions What options are out there these days for audio playback/mixing in C++? Primarily for Windows, but portability (particularly to Mac and iOS) would be desirable. For a small indie game, potentially commercial, though - so I'm looking for something free/low-cost. My requirements are fairly basic - I don't need 3D sound, or many-channels - simple stereo is fine. Just need to be able to mix sound effects and a music stream, maybe decoding one or more compressed audio formats (.ogg/.mp3 etc), with all the basic controls over looping, pitch, volume, etc. Is OpenAL more-or-less the standard choice, or are there other good options out there?

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• FBO rendering different result between Glaxay S2 and S3

  - by BruceJones

  I'm working on a pong game and have recently set up FBO rendering so that I can apply some post-processing shaders. This proceeds as so: Bind texture A to framebuffer Draw balls Bind texture B to framebuffer Draw texture A using fade shader on fullscreen quad Bind screen to framebuffer Draw texture B using normal textured quad shader Neither texture A or B are cleared at any point, this way the balls leave trails on screen, see below for the fade shader. Fade Shader private final String fragmentShaderCode = "precision highp float;" + "uniform sampler2D u_Texture;" + "varying vec2 v_TexCoordinate;" + "vec4 color;" + "void main(void)" + "{" + " color = texture2D(u_Texture, v_TexCoordinate);" + " color.a *= 0.8;" + " gl_FragColor = color;" + "}"; This works fine with the Samsung Galaxy S3/ Note2, but cause a strange effect doesnt work on Galaxy S2 or Note1. See pictures: Galaxy S3/Note2 Galaxy S3/Note2 Galaxy S2/Note Galaxy S2/Note Can anyone explain the difference?

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• How to disable drag and drop of text within the textarea? [migrated]

  - by Manoj Agarwal

  I am working on UI Design, where I need to use Html textarea object. The sample code is: <textarea rows="5" cols="60" spellcheck="false" style="font-size:12px; font-family: Verdana;"> Abc Xyz Mnp Pqr </textarea> I don't want to disable the textarea, since there are some cross-browser issues. If I point on 'y' in 'xyz' and drag it after text 'Mnp', it will be shifted as 'Mnpyz'. I want to avoid this drag and drop feature of text within the text area.

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• What is the difference between all-static-methods and applying a singleton pattern?

  - by shahensha

  I am making a database to store information about the users of my website (I am using stuts2 and hence Java EE technology). For the database I'll be making a DBManager. Should I apply singleton pattern here or rather make all it's methods static? I will be using this DBManager for basic things like adding, deleting and updating User profiles. Along with it, I'll use for all other querying purposes, for instance to find out whether a username already exists and to get all users for administrative purposes and stuff like that. My questions What is the benefit of singleton pattern? Which thing is most apt here? All static methods or a singleton pattern? Please compare both of them. P.S. The database is bigger than this. Here I am talking only about the tables which I'll be using for storing User Information.

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• Visual Studio 2012 Coded UI technology matrix updated!

  - by krislankford

  The Visual Studio 2012 support matrix for Automated UI Testing (Coded UI) has been released by Microsoft and the full post can be found here. Thank you Shubhra! There are a couple of items on the list that you should definitely keep your eye on. The first item is the support for Silverlight 4  and 5. This should make the Silverlight community happy. I would also note the Planned items (blue dot) which are cross browser support and Flash/Java. Happy Coding!

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• css - use universal '*' selector vs. html or body selector?

  - by Michael Durrant

  Applying styles to the body tag will be applied to the whole page, so body { font-family: Verdana } will be applied to the whole page. This could also be done with * {font-family: Verdana} which would apply to all elements and so would seem to have the same effect. I understand the principle that in the first instance the style is being applied to one tag, body for the whole page whereas in the second example the font is being applied against each individual html elements. What I am asking is what is the practical difference in doing that, what are the implications and what is a reason, situation or best practice that leads to using one over another. One side-effect is certainly speed (+1 Rob). I am most interested in the actual reason to choose one over the other in terms of functionality.

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• Somes importants shorcuts of Blender does not work on Ubuntu

  - by Linko

  In Ubuntu (and Mint) some important shortcuts for Blender does not work. Alt + right click to select an edge loop (heavily used on all 3D softwares) doesn't work, a useless menu of Ubuntu pop up to ask if the application must be closed or minimize. Ctrl + Alt + 0 to define the current view as the view of the camera minimize the application. This shortcut of Ubuntu is useless, it's faster to click on the minimize icon. Ctrl + number to apply a subdivision surface level do nothing on Blender, it's one of the most used shortcut of Blender. For the moment I stay on Windows 7 just to use these 3 shortcuts.

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• Can I rightfully claim this as my own project if I recieved help online?

  - by Brad Guy

  Basically I'm new to network programming in Python, so I went on a tutorial online to find out about it. Using what was taught in the tutorial (creating a socket, connecting to ports, etc), I modified the code so that I made a program where two computers can send messages to one another. If I were to apply for a job and show this to my interviewers, would the code for it technically be mine? It is fair to say that I didn't modify the code by that much; However, what if for example I modified it into something like a tic-tac-toe game, where two users play each other from different PCs, would the code then be mine? I just don't want to look like a plagiarizer hence why I ask.

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• When dealing with a static game board, what are some methods to make it more interesting?

  - by Ólafur Waage

  Let's say you have a game board that you look at. It does not move but there is some action going on. For example Chess, Checkers, Solitaire. The game I'm working on is not one of these but it's a good reference. What are some methods you can apply to the game or the design that increases the appeal of the game to the user? Of course you can make it prettier but what are some other methods you can use? For example: Visual cues, game design changes, user interface arrangement, etc.

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• IE HTML Debugger Causing Issues with IE Enhanced Security

  - by Damon

  In an effort to debug a Silverlight component on a page in SharePoint I opened the Developer Tools in Internet Explorer.  After choosing the Find > Select Element by Click option my page refreshed for some reason and a small bar appeared at the top of the page reading: You may be trying to access this site from a secured browser on the server. Please enable scripts and reload this page. After a quick look around the internet, some seemed to be suggesting that you have to disable the Internet Explorer Enhanced Security Configuration (IE ESC) in Server Manager.  Since this is one of the very first things I do when creating a VM, I figured the solution did not apply to me.  However, I decided to go ahead and enable IE ESC and then disable it again to see if that would fix the problem, and it did.  So if you see that error message in IE, the bar and you've already got IE ESC disabled, you can just enable it and disable it to get rid of the bar.

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• Can I automatically make my Nvidia card's fan quieter?

  - by Salim Fadhley

  I have a machine with an Nvidia graphics card. Unfortunately the GPU fan is very loud. It's very annoying at times. We never use this machine for intense 3d work - that GPU is probably not working very hard at all. I'm pretty sure I can run it at a much lower fan-speed without causing any problems. The nvclock utility can be used to manually adjust the fan-speed of my Nvidia graphics card. I'd like to call this utility automatically when the machine boots up. Is there some kind of system service which I can use to automatically apply this kind of system-wide configuration? Even better, is there a system monitoring service which can poll the GPU temperature and adjust the various system fan-speeds accordingly? Thanks!

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• Small auto scrolling window

  - by Faith In Unseen Things

  I'd like to apply a global site-wide little javascript window on the very bottom right of the site that will display a window about 40 x 80 wide, just a book icon and the word "Bible", where when a person clicks it, it will open a pop-up window, centered and pull whatever page I give it to display the bible itself (I have it internally already). These little javascript windows auto scroll as you scroll up or down the pages, you've seen them many times. PS: I also want a "hide" option, but it doesn't hide it but minimizes it down to a small icon, all the way to the very bottom right of the site. So, click it opens, click it minimizes. Problem is, I don't know the name of this type of script :) Your help appreciated. Thanks.

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• Does setting document.domain via script interfere with Google Analytics?

  - by Seth Petry-Johnson

  I have a site, www.example.com, that displays some secure content from forms.example.com in iframes. To enable cross-frame navigation, pages on both sites use JavaScript to set the document.domain to just "example.com". I am using Google Analytics on www.example.com, but the GA site is not showing any data. It indicates that the tracking code is found (the status icon is a green checkmark), but no data is reported. The GA profile lists the website as "www.example.com". Is this a supported scenario? Is my script interfering with the GA code in some way?

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• When is it time to start afresh instead of trying to rewrite the existing project?

  - by gablin

  As projects grow and age and new features are introduced, there may come a time when it's probably better to start anew. Some features may require so much rewriting that it would be easier (and maybe faster) to just rewrite the whole thing from scratch. Also, then you have the opportunity to apply what you've learned from the first project and thus improve the code and design of the successor. Is there a way of recognizing when this time is? Is it just a gut feeling, or could you say that "after x years, you probably should start over", or some other rule of thumb?

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• Box2Dweb very slow on node.js

  - by Peteris

  I'm using Box2Dweb on node.js. I have a rotated box object that I apply an impulse to move around. The timestep is set at 50ms, however, it bumps up to 100ms and even 200ms as soon as I add any more edges or boxes. Here are the edges I would like to use as bounds around the playing area: // Computing the corners var upLeft = new b2Vec2(0, 0), lowLeft = new b2Vec2(0, height), lowRight = new b2Vec2(width, height), upRight = new b2Vec2(width, 0) // Edges bounding the visible game area var edgeFixDef = new b2FixtureDef edgeFixDef.friction = 0.5 edgeFixDef.restitution = 0.2 edgeFixDef.shape = new b2PolygonShape var edgeBodyDef = new b2BodyDef; edgeBodyDef.type = b2Body.b2_staticBody edgeFixDef.shape.SetAsEdge(upLeft, lowLeft) world.CreateBody(edgeBodyDef).CreateFixture(edgeFixDef) edgeFixDef.shape.SetAsEdge(lowLeft, lowRight) world.CreateBody(edgeBodyDef).CreateFixture(edgeFixDef) edgeFixDef.shape.SetAsEdge(lowRight, upRight) world.CreateBody(edgeBodyDef).CreateFixture(edgeFixDef) edgeFixDef.shape.SetAsEdge(upRight, upLeft) world.CreateBody(edgeBodyDef).CreateFixture(edgeFixDef) Can box2d really become this slow for even two bodies or is there some pitfall? It would be very surprising given all the demos which successfully use tens of objects.

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• SQL SERVER Get Latest SQL Query for Sessions DMV

  In recent SQL Training I was asked, how can one figure out what was the last SQL Statement executed in sessions. The query for this is very simple. It uses two DMVs and created following quick script for the same. SELECT session_id, TEXT FROM sys.dm_exec_connections CROSS APPLYsys.dm_exec_sql_text(most_recent_sql_handle) AS ST While working with DMVs if you [...]...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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• Years experience over unfinished degree?

  - by Daniel Lewis

  I'm currently in my placement year and working for a great software development company. It was always my intention of getting to this stage through university, getting enough academic experience as well as the year’s placement and then try to get a full time programming job without the need to finish my degree. I decided this from an early stage as I have never really liked the whole university environment. I was so unhappy at university and I’m so happy now I’m on my placement year, I really don’t know if I can go back. My question is, do you think companies will take me on if I apply for other jobs after my placement year and not penalize me for not finishing my degree? I guess at the end of the day I don't want to look back on my life and think "god, why didn't I just spend one more year being unhappy to have a job I love" but I know that even if I get a degree I could still end up without a programming job and this worries me more than anything.

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• Xubuntu: how do I automatically mount external NTFS drive with writes allowed?

  - by user74372

  i would have thought mine was such a common question that there would be a simple solution already built in to xubuntu - but there isnt. i have 2 separate external hard disks and connect them to a usb port at different times - i would like them to be automatically mounted as read/write, but apparently the designers of gnome-volume-manager decided that shouldnt be possible and they are mounted as read-only in fact, i can write new files to them, but cannot then delete the new files i just wrote! is there a workaround? i read somewhere that etc/fstab doesn't apply to removable media, which are mounted by gnome-volume-manager and therefore cannot be unmounted by a user

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• Chrome Mobile: The Mobile Web Developers Toolkit (Part 2)

  Chrome Mobile: The Mobile Web Developers Toolkit (Part 2) Building for mobile web requires a different mindset than desktop web development, and a different set of tools. The tools we're used to using often aren't available or would take up too much screen real estate. And going back to the dark ages of tweak/save/deploy/test/repeat isn't exactly optimal, so what can we do? Thankfully there are a number of great options - from remote debugging to emulation, mobile browsers are offering more and more tools to make our lives easier. We'll take a look at a couple of tools that you can use today to make cross platform mobile web development easier and then peer into the crystal ball to see what tools may bring in the future. Join us for Part 2 - as we take a look at a some of the many tools to make testing the mobile web easier. From: GoogleDevelopers Views: 0 0 ratings Time: 01:00:00 More in Science & Technology

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• How to pass information across domains to ask for newsletter only once?

  - by Michal Stefanow

  Lets assume following scenario, I have two sites: example1.com example2.com When user visits 1 there is a prompt "please signup to a newsletter". Same thing happens when user visits 2. However when navigating from 1 to 2 I don't want signup form to be shown. My first thought were 3rd-party cookies, but it seems that they are blocked / not working: http://stackoverflow.com/questions/4701922/how-does-facebook-set-cross-domain-cookies-for-iframes-on-canvas-pages?rq=1 http://stackoverflow.com/questions/172223/how-do-i-set-cookies-from-outside-domains-inside-iframes-in-safari?rq=1 Another thought is to append #noshow for each URL but that would require some work - for instance a script that would intercept click / tap events and modify URL structure depending on the address. (but that seems hacky) I wonder if you know a robust well-established solution to this issue? Thanks

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• DRY, string, and unit testing

  - by Rodrigue

  I have a recurring question when writing unit tests for code that involves constant string values. Let's take an example of a method/function that does some processing and returns a string containing a pre-defined constant. In python, that would be something like: STRING_TEMPLATE = "/some/constant/string/with/%s/that/needs/interpolation/" def process(some_param): # We do some meaningful work that gives us a value result = _some_meaningful_action() return STRING_TEMPLATE % result If I want to unit test process, one of my tests will check the return value. This is where I wonder what the best solution is. In my unit test, I can: apply DRY and use the already defined constant repeat myself and rewrite the entire string def test_foo_should_return_correct_url(): string_result = process() # Applying DRY and using the already defined constant assert STRING_TEMPLATE % "1234" == string_result # Repeating myself, repeating myself assert "/some/constant/string/with/1234/that/needs/interpolation/" == url The advantage I see in the former is that my test will break if I put the wrong string value in my constant. The inconvenient is that I may be rewriting the same string over and over again across different unit tests.

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• How does delicious.com avoid being sued for copyright infringement?

  - by Stanish

  With the recent redesign of delicious.com, they've added a much more graphical home page. The site continues to be a service for people to bookmark and share websites they come across on the web. The delicious home is now made up of images taken from those linked sites. See for yourself at http://delicious.com I would like to know what in the law allows them to do this, considering the images represent the main content of the page, and they clearly do not own copyright to those images? I know there is some leeway given to search engines where it is considered fair use to use a small portion of the content if the aim is to lead people to the originating site. Does that apply here?

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• box2d and constant movement

  - by Arnas

  i'm developing a game with a top down view, the players body is a circle. To move the character you need to tap on the screen and it moves to the spot. To achieve this i'm saving the coordinate of the touch and call a method every frame which applies linear velocity to the body with a vector of the direction the body should go _body->SetLinearVelocity(b2Vec2((a.x - currPos.x)/SPEED_RATIO,(size.height - a.y - currPos.y)/SPEED_RATIO)); //click position - current position, screen height - click position (since the y axis is flipped, (0,0) is in the bottom left ) - current position = vector of the direction we want to go now the problem with this is that the body slows down until it finally stops when getting closer to the point we want it to go, since the closer we are to that point the lenght of the vector gets smaller. Besides that i've read that it's bad practice to set linear velocity in box2d and i should use apply force instead, but that way the forces would add up and overshoot the target where it's supposed to stop. So what i'm asking is how to move a box2d body to a coordinate in constant speed.

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