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  • What does "fully supported" mean in context of Radeon Opensource Video Driver?

    - by stevecoh1
    UPDATE: This is not a request for support of my specific issue. Details of that issue are here: How to recover from bad upgrade to 13.04 (Unity very slow) . I have "solved" that issue, for the time being anyway, by loading alternative lighter weight desktops. This question was opened specifically to question the meaning of the documentation at https://help.ubuntu.com/community/RadeonDriver . END OF UPDATE There it is, in Black and White: https://help.ubuntu.com/community/RadeonDriver Fully Supported All these Radeon(HD) cards and derivatives have good 3D acceleration support. This is not an exhaustive list: ... RV610/RV630 Radeon HD 2400/2600/2700/4200/4225/4250 Yet in my case (the HD2400) this proves to be manifestly untrue, at least if "Fully Supported" means sufficient to run Unity in Ubuntu 13.04. It runs all the applications I can launch under Unity, but Unity itself is unbearably slow. It's quite striking really. Click on the "Dash" - go get a cup of coffee. Type a key in the Unity search box, wait five seconds for it to appear. Type Alt-tab and wait five seconds for the screen to finish painting. None of these issues appear outside of Unity components. As you all know, there are complaints about slow performance all over the Internet about Unity. Shouldn't this page somehow address this issue? Especially if "fully supported" doesn't mean sufficiently to run the default modern Ubuntu release. What does "fully supported" mean?

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  • Scaling along an arbitrary axis (Dealing with non-uniform scale)

    - by Jon
    I'm trying to build my own little engine to get more familiar with the concepts of 3D programming. I have a transform class that on each frame it creates a Scaling Matrix (S), a Rotation Matrix from a Quaternion (R) and concatenates them together (S*R). Once i have SR, I insert the translation values into the bottom of the three columns. So i end up with a transformation matrix that looks like: [SR SR SR 0] [SR SR SR 0] [SR SR SR 0] [tx ty tz 1] This works perfectly in all cases except when rotating an object that has a non-uniform scale. For example a unit cube with ScaleX = 4, ScaleY = 2, ScaleZ = 1 will give me a rectangular box that is 4 times as wide as the depth and twice as high as the depth. If i then translate this around, the box stays the same and looks normal. The problem happens whenever I try to rotate this scaled box. The shape itself becomes distorted and it appears as though the Scale factors are affecting the object on the World X,Y,Z axis rather than the local X,Y,Z axis of the object. I've done some pretty extensive research through a variety of textbooks (Eberly, Moller/Hoffman, Phar etc) and there isn't a ton there to go off of. Online, most of the answers say to avoid non-uniform scaling which I understand the desire to avoid it, but I'd still like to figure out how to support it. The only thing I can think off is that when constructing a Scale Matrix: [sx 0 0 0] [0 sy 0 0] [0 0 sz 0] [0 0 0 1] This is scaling along the World Axis instead of the object's local Direction, Up and Right vectors or it's local Z, Y, X axis. Does anyone have any tips or ideas on how to handle construction a transformation matrix that allows for non-uniform scaling and rotation? Thanks!

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  • How does a segment-based rendering engine (as in Descent) work?

    - by Calmarius
    As far as I know Descent was one of the first games that featured a fully 3D environment, and it used a segment based rendering engine. Its levels are built from cubic segments (these cubes may be deformed as long as it remains convex and sides remain roughly flat). These cubes are connected by their sides. The connected sides are traversable (maybe doors or grids can be placed on these sides), while the unconnected sides are not traversable walls. So the game is played inside of this complex. Descent was software rendered and it had to be very fast, to be playable on those 10-100MHz processors of that age. Some latter levels of the game are huge and contain thousands of segments, but these levels are still rendered reasonably fast. So I think they tried to minimize the amount of cubes rendered somehow. How to choose which cubes to render for a given location? As far as I know they used a kind of portal rendering, but I couldn't find what was the technique used in this particular kind of engine. I think the fact that the levels are built from convex quadrilateral hexahedrons can be exploited.

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  • Trouble with Collada bones

    - by KyleT
    I have a Collada file with a rigged mesh. I've read the node tags in the library_visual_scenes tag and extracted the matrix for each node and stored everything in a hierarchical bone structure. My Matrix container is "row major", so I'd store the first float of a matrix tag in the 1st row, 1st column, the second in the 1st row, 2nd column, etc. From what I gather this is the Bind Pose Matrix. After that I went through the tag and extracted the float array in the source tag of the skin tag of the controller for the mesh. I stored each matrix from this float array in their corresponding Bone as the Inverse Bind Matrix. I also extracted the bind-shape-matrix and stored it. Now I'd like to draw the skeleton with OpenGL to see if everything is working correctly before I go about skinning. I iterate once over my bones and multiply a bone's Bind Pose Matrix by it's parents and store that. After that I iterate again over the bones and multiply the result of the previous matrix multiplication by the Inverse Bind Matrix and then by the Bind Shape Matrix. The results look something like this: [0.2, 9.2, 5.8, 1.2 ] [4.6, -3.3, -0.2, -0.1 ] [-1.8, 0.2, -4.2, -3.9 ] [0, 0, 0, 1 ] I've had to go to various sources to get the little understanding of Collada I have and books about 3d transform matricies can get pretty intense. I've hit a brick wall and if you could please read through this and see if there is something I'm doing wrong, and how I'd go about getting an X,Y,Z to draw a point for each of these joints once I've calculated the final transform, I'd really appreciate it.

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  • Working with lots of cubes. Improving performance?

    - by Randomman159
    Edit: To sum the question up, I have a voxel based world (Minecraft style (Thanks Communist Duck)) which is suffering from poor performance. I am not positive on the source but would like any possible advice on how to get rid of it. I am working on a project where a world consists of a large quantity of cubes (I would give you a number, but it is user defined worlds). My test one is around (48 x 32 x 48) blocks. Basically these blocks don't do anything in themselves. They just sit there. They start being used when it comes to player interaction. I need to check what cubes the users mouse interacts with (mouse over, clicking, etc.), and for collision detecting as the player moves. Now I had a massive amount of lag at first, looping through every block. I have managed to decrease that lag, by looping through all the blocks, and finding which blocks are within a particular range of the character, and then only looping through those blocks for the collision detection, etc. However, I am still going at a depressing 2fps. Does anyone have any other ideas on how I could decrease this lag? Btw, I am using XNA (C#) and yes, it is 3d.

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  • Créez vos propres jeux 3D comme les pros, avec le Blender Game Engine, un livre de Grégory Gosselin De Bénicourt

    Créez vos propres jeux 3D comme les pros Avec le Blender Game Engine Longtemps réservée à un cercle de programmeurs passionnés, la 3D peine encore à s'inviter au sein des petits studios de jeux indépendants, et pour cause: le ticket d'entrée est relativement élevé. Blender (logiciel gratuit et Open Source) permet de modéliser, d'animer, de faire un rendu 3D et surtout d'être utilisé comme moteur de jeu. C'est l'outil parfait pour le débutant, mais également pour celui qui veut créer un...

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  • Which toolkit to use for 3D MMO game development?

    - by Ahmet Yildirim
    Lately i've been thinking about which path to follow for developing an 3D Online game. I have googled a lot but i couldnt find a good article that covers both game development and online server & client development in same context. This question has been in mind for about 2 weeks now. So.. yesterday i started developing a game from scratch by using Irrlicht.Net Wrapper to use Socket library of .NET which im already familiar. But i found out .Net wrapper of Irrlicht is not totally finished yet and still have lacks from the original. So i lost all my motives :/. So i thought why not to ask the experts before i run into another dead end... What Game Engine and Networking Library is best way to go for 3D MMO Development? Here is some of my early conclusions: Please let me know the ones im wrong. C++: Best Performance for 3D Graphics. Most Game Engines has native C++ Libraries. Lacks a Solid Socket Library .NETC++ Lacks Intellisense Support. C#: Intellisense Support NET Socket Library Lacks 3D Graphics Performance Lacks a native solid 3D Game Engine

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  • What kind of physics to choose for our arcade 3D MMO?

    - by Nick
    We're creating an action MMO using Three.js (WebGL) with an arcadish feel, and implementing physics for it has been a pain in the butt. Our game has a terrain where the character will walk on, and in the future 3D objects (a house, a tree, etc) that will have collisions. In terms of complexity, the physics engine should be like World of Warcraft. We don't need friction, bouncing behaviour or anything more complex like joints, etc. Just gravity. I have managed to implement terrain physics so far by casting a ray downwards, but it does not take into account possible 3D objects. Note that these 3D objects need to have convex collisions, so our artists create a 3D house and the player can walk inside but can't walk through the walls. How do I implement proper collision detection with 3D objects like in World of Warcraft? Do I need an advanced physics engine? I read about Physijs which looks cool, but I fear that it may be overkill to implement that for our game. Also, how does WoW do it? Do they have a separate raycasting system for the terrain? Or do they treat the terrain like any other convex mesh? A screenshot of our game so far:

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  • Firefox 11 affiche la structure des pages web en 3D et les changements dans les feuilles de styles CSS en temps réel

    Firefox 11 affiche la structure des pages web en 3D Et les changements dans les feuilles de style CSS en temps réel Firefox 11 vient d'intégrer un ensemble d'améliorations qui risquent de ne pas laisser les développeurs web indifférents. La première nouveauté est un outil qui permet de visualiser la structure (CSS, etc.) d'une page en 3D. Page Inspector 3D View, surnommé Tilt, repose sur WebGL. « Cet outil permet à tout utilisateur de comprendre immédiatement le lien entre le code et la page finale », explique Mozilla. « Alors que les outils pour développeurs, tels que « view source », ont toujours été utiles pour apprendre à développer une page, l'affichage en 3D...

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  • best way of rendering more 3D models in three.js that not slow down page?

    - by GDevLearner
    I am in the way of creating a 3D web game using threeJS library. This is a multi-player game that players are 3D human models in game, and I need to add a human 3D model for each player that enters the game. Additionally, I want to animate the humans while they walking, but the problem, here is that adding a 3D model and animating that for each player will slow down the game or maybe cause the browser to crash. question: what is the better way of showing and animating the player's models that will not slow down the game?

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  • Why does IIS respond to a secure(SSL) page request with a 302 to its non-secure version?

    - by ISawrub
    I have SSL installed at the root of a server. I have a page whose code behind code is supposed to redirect after certain validation to a secure page. Here's the redirect code: switch (PageBase2.GetParameterValue("Environment")) //Retrieves App Setting named Environment from web.config { case "Server": strURL = @"https://" + HttpContext.Current.Request.Url.Authority + "/checkout/payment.aspx"; break; case "Local": strURL = @"http://" + HttpContext.Current.Request.Url.Authority + "/checkout/payment.aspx"; break; default: strURL = @"https://" + HttpContext.Current.Request.Url.Authority + "/checkout/payment.aspx"; break; } Response.Redirect(strURL, false); But the page that's been served by IIS is non-secure. I looked at the firebug console and it appears that the client does make a get request to https://server/checkout/payment.aspx but IIS responds with a 302 to http://server/checkout/payment.aspx Any clues, as to what could be causing it. I've even tried forcing SSL for the page, but it doesn't work I get 403.4 error. (SSL is required to view this resource.) And if i remove the redirection logic and code the payment page to redirect to its SSL version when the connection is not secure using Request.IsSecureConnection, i end up with an endless redirect loop, simply because IIS still won't serve the secure version without a 302. Any ideas?

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  • Oracle Solutions supporting ICAM deployments

    - by user12604761
    The ICAM architecture has become the predominant security architecture for government organizations.  A growing number of federal, state, and local organizations are in various stages of using Oracle ICAM solutions.  The relevance of ICAM has clearly extended beyond the Federal ICAM mandates to any government program that must enable standards based interoperability like health exchanges and public safety.  The state government endorsed version of ICAM was just released with the NASCIO SICAM Roadmap. ICAM solutions require an integrated security architecture.  The major new release in August of Oracle Identity Management 11gR2 focuses on a platform approach to identity management.  This makes it easier for government organizations to acquire and implement a comprehensive ICAM solution, rather than individual products.  The following analysts reports describe the value of the Oracle Solutions: According to The Aberdeen Group:  “Organizations can save up to 48% deploying a platform of  (identity management) solutions when compared to deploying point solutions” IDC Product Flash, July 2012:  “Oracle may have hit the home run grand slam in identity management recently with the announcement of Oracle Identity Management 11g R2." For additional information on the Oracle ICAM solutions, attend the Webcast on October 10, 2012:  ICAM Framework for Enabling Agile, Service Delivery. Visit the Oracle Secure Government Resource Center for information on enterprise security solutions that help government safeguard information, resources and networks.

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  • Is sending data to a server via a script tag an outdated paradigm?

    - by KingOfHypocrites
    I inherited some old javascript code for a website tracker that submits data to the server using a script url: var src = "http://domain.zzz/log/method?value1=x&value2=x" var e = document.createElement('script'); e.src = src; I guess the idea was that cross domain requests didn't haven't to be enabled perhaps. Also it was written back in 2005. I'm not sure how well XmlHttpRequests were supported at the time. Anyone could stick this on their website and send data to our server for logging and it ideally would work in most any browser with javascript. The main limitation is all the server can do is send back javascript code and each request has to wait for a response from the server (in the form of a generic acknowledgement javascript method call) to know it was received, then it sends the next. I can't find anyone doing this online or any metrics as to whether this faster or more secure than XmlHttpRequests. I don't know if this is just an old way of doing things or it's still the best way to send data to the server when you are mostly trying to send data one way and you need the best performance possible. So in summary is sending data via a script tag an outdated paradigm? Should I abandon in favor of using XmlHttpRequsts?

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  • How to secure JBoss application server using SELinux

    - by Jakub Elias
    I want to secure RedHat 5.4 application server by SELinux (targeted policy) and have several questions 1, where can i get SELinux sources (/etc/selinux//src/policy/)There seems to be no such package on install cd .. 2, how to restrict user rights (for example user jboss could not modify /etc/my.cnf) 3, how to configure JBoss application server to work under SELinux Although i read many documents from NSA the whole topic is still not clear for me.What i want is to basically protect filesystem in case one account is broken.I cannot find any materials about securing jboss server using either chroot jail, ACLs or SELinux ....

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  • Safari can’t establish a secure connection to the server

    - by Haris
    I am using Mac OS X 10.5.8 behind a company firewall and have proxy settings and username / password through which I can connect to internet. The internet is working as I am posting this question through it, but if I try to open Facebook or Gmail the following message appears: Safari can’t open the page “https://www.google.com/accounts/ServiceLogin?[..]” because Safari can’t establish a secure connection to the server “www.google.com” What could be wrong?

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  • Cheap and Secure Proxy

    - by jack
    Hi I'm looking for cheap secure proxy providers that support vpn http socks like this one http://www.your-freedom.net/. Because I wish to compare their efficiency. YF(http://www.your-freedom.net/) doesn't provide my satisfaction on speed they provide after purchasing the account. Their try-before-buy account has much more speed than the purchased one. Thanks.

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  • Secure LAMP server for production use

    - by WalterJ89
    What is the procedure for securing a Linux, Apache, MySQL, PHP Server (or even Perl) for production use? Other than setting the MySql password and the root password for linux what other (maybe not so obvious) steps should be taken? Also what steps can I take if I was going to be extra paranoid that may not normally be nessasary? this is for a basic single site use but must be secure. Thank you. (sorry if this was asked before)

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  • How to secure memcached?

    - by alfish
    In Debian, I have installed memcached (using this guide) to lower the otherwise unmanageable load on mysql database. The database is on a separate server, and memcached and Varnish are on the front server. Is it a potential security hole to leave memcached unprotected by a firewall? If so, how should I secure it? The situation is especially worrisome,as I've received (unproved) reports of cookie thefts on the server. Thanks

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  • Secure email crashes Outlook 2007

    - by Josh
    I have a number of secure emails sent to my Outlook 2007 client. Most arrive fine and display the prompt with regards to granting access to the certificate and then open. Today I received two that crash Outlook whenever I try to open them. I've tried restarting Outlook and my computer but still have the same problem. Any ideas what might be causing this, and how I can fix it? I'm working on Windows Vista Ultimate 64-bit.

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  • hMailserver: Secure SMTP SetUP - Trusted Cert Issue

    - by Peter
    I'm trying to configure hMailserver with a 3rd party SSL cert. I'v 1) Installed the SSL key & cert 2) Placed the hash named CA and intermediate in to the \externals\cs folder Now, the connection between the mail client and the server is secure and works. The issue is that mail clients outlook, apple mail, others issue an untrusted cert warning. I've followed several threads on the forums, but none seem to solve this problem

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  • Secure linux distro that sends traffic through Tor

    - by gravestone
    I'm looking for a live Linux distro that is secure and preserves my anonymity online. For what I need, Tor seems to do the job – but such software requires configuration that someone who is not knowledgeable in how it works might find difficult. I was looking at 'Lightweight portable security' but it does not specify whether it sends all traffic through Tor. Does anyone know more information about it and/or any other such live Linux distro?

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