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  • How come transparency in textures appears as white in 3ds Max?

    - by rFactor
    I have downloaded a free tree palm model that came with textures and a preview image. In the preview image the tree looks fine, but when I have deployed the textures to my scene, the leaves look green plus white, where white is the transparency area. Is there something I need to know about transparent textures? Both in the view-port and in the renderer all transparency appears as white. What could it be? Edit: The model I was talking about is implemented with two JPGs. One is textured and the other one is black-white where white represents transparency and is applied to the material in the opacity channel/map. The transparency seems to work somewhat, but there are white borders around the leaves. I think it's because the opacity channel does not properly filter out all white colors for some reason. It also seems that changing the blur affects it, but setting it to 0 does not remove it though (and makes it jaggy).

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  • Software Engineer's explanation of Facebook photo privacy, with UML diagram?

    - by Alex R
    Facebook photo privacy is more complex than most people think - including the bloggers who fill the Internet trying to explain it in simple terms. Not only there is the basic album-level privacy setting to consider, but also what happens with Tagging (and related privacy settings) as well as the Share button when clicked by a Friend. Has anybody seen a good, engineering-type (e.g. UML) diagram? I envision it should include the various privacy "states" a photo can be in, what causes state transitions, and the characteristics of each state? Thanks

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  • sudo su - username while keeping ssh key forwarding

    - by Florian Schulze
    If I have a server A into which I can login with my ssh key and I have the ability to "sudo su - otheruser", I lose key forwarding, because the env variables are removed and the socket is only readable by my original user. Is there a way I can bridge the key forwarding through the "sudo su - otheruser", so I can do stuff on a server B with my forwarded key (git clone and rsync in my case)? The only way I can think of is adding my key to authorized_keys of otheruser and "ssh otheruser@localhost", but that's cumbersome to do for every user and server combination I may have.

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  • a brand new FS based on a database without using fuse

    - by Devrim
    hi all, To serve millions of files out of a single directory, being able to connect to a drive from hundreds of endpoints, and for some other reasons (to avoid gluster/nfs/all fs based networking solutions), I want to evaluate the possibility of making a filesystem that's based on a mongodb (or any other). Basically, it works like fusefs, every single file is kept in mongo gridfs. In theory, I do, mount mongodbfs /mountPoint mongodb://localhost then when i say touch /mountPoint/test.txt this file is inserted into mongodb. This FS will also store uid/gid and perms with the file, we can throw hundreds of servers to it, and no useradd will be necessary. I'm not thinking to include all the features of FS, just the ones we need. My question is, how do I start my quest in finding resources, books, links, people, developers who'd help me implement this? at least a proof of concept. Is it feasible? What should I expect as a timeline for such undertaking? Please only think about gazillion small files and folders.

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  • Web based KVM management for Ubuntu

    - by Tim
    We've got a single Ubuntu 9.10 root server on which we want to run multiple KVM virtual machines. To administer these virtual machines I'd like a web based KVM management tool, but I don't know which one to choose from the list of tools mentioned on linux-kvm.org. I've used virsh & virt-manager on my desktop, but would like a web interface for the server. I tested ConVirt on my desktop, but it failed to pickup KVM machines from virsh / virt-manager, and I could not get KVM virtual machine import to work (only Xen). oVirt looks good, but I can't find out if and how I can install it on Ubuntu 9.10.. (And I'd really rather not waste another few days on testing stuff that might not work in the end.) Can anyone recommend any good web based KVM management tools that are easy to install on Ubuntu 9.10? I'm looking for something that will also allow me to run other services like apache and postgresql besides hosting virtual machines, so preferably fairly lightweight & no dedicated OS installs. We don't need any professional clustering / migration or anything, just something that will let us create, start, inspect, administer & stop virtual machines from a web page. Best regards, Tim Update: Anyone have any suggestions? It's awfully quiet here..

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  • Ways to parse NCSA combined based log files

    - by Kyle
    I've done a bit of site: searching with Google on Server Fault, Super User and Stack Overflow. I also checked non site specific results and and didn't really see a question like this, so here goes... I did spot this question, related to grep and awk which has some great knowledge but I don't feel the text qualification challenge was addressed. This question also broadens the scope to any platform and any program. I've got squid or apache logs based on the NCSA combined format. When I say based, meaning the first n col's in the file are per NCSA combined standards, there might be more col's with custom stuff. Here is an example line from a squid combined log: 1.1.1.1 - - [11/Dec/2010:03:41:46 -0500] "GET http://yourdomain.com:8080/en/some-page.html HTTP/1.1" 200 2142 "-" "Mozilla/5.0 (Windows; U; Windows NT 6.1; C) AppleWebKit/532.4 (KHTML, like Gecko)" TCP_MEM_HIT:NONE I'd like to be able to parse n logs and output specific columns, for sorting, counting, finding unique values etc The main challenge and what makes it a little tricky and also why I feel this question hasn't yet been asked or answered, is the text qualification conundrum. When I spotted asql from the grep/awk question, I was very excited but then realised that it didn't support combined out of the box, something I'll look at extending I guess. Looking forward to answers, and learning new stuff! Answers doesn't have to be limited to platform or program/language. For the context of this question, the platforms I use the most are Linux or OSX. Cheers

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  • Recommend a UK based VPS host equivalent to Dreamhost [closed]

    - by Pez Cuckow
    I appreciate this question could be considered subjective and argumentative so can people make recommendations rather than arguing about the best. I believe the "correct" answer is the one closest to what I am looking for. Basically I live in the UK but have been using the US based Dreamhost for about 6 years now, and my web projects are getting to the scale where the websites need to the UK based to cope with the demand and load. I originally had shared hosting with Dreamhost but upgraded to a VPS a while ago, getting 512mb of RAM, unlimited disk space, bandwidth and domains for $30. Their control panel is a custom easy to use build that they have created in house and offers features very similar to other web panels (as far as I am aware). So basically my question boils down to, is there anywhere that offers an equivalent package? In all honesty as long as I have over 50gb HDD space and unlimited domains it doesn't really matter? Are there any VPS providers you would recommend as reliable? I promise to check every link posted, many thanks for your time!

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  • Blender/POV-Ray differences

    - by Magnap
    I am currently following a tutorial for Blender, but came across POV-Ray mentioned as a renderer. After having researched it a bit, i took a look at it's scene description (scripting) language, which kind of fascinated me. But, after even more googling of the topic, i am still wondering: What are the main and key differences between working with 3D in resp. Blender and POV-Ray? PS: I suspect this might not be the best place for a question such as this, but it seems to be the most suitable.

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  • VPN: Disable class based route addition for Windows XP/Vista

    - by brgsousa
    Paraphrasing this SuperUser link: When you set up a VPN, the Windows default is to enable "Use default gateway on remote network." A new default route is added to the routing table pointing to the remote network's gateway, and the existing default route has its metric increased to force all Internet traffic to traverse the tunnel and use the remote network's gateway. All traffic uses the VPN, and traffic destined for the outside world is directed to the remote gateway. When the VPN drops, the route to the remote gateway is removed and the original default route is set back to the original metric. Unchecking "use default gateway on remote network" means that new default route isn't added, so Internet traffic goes out the local gateway, but a new classful route is added to the routing table, using the local adapter's IP, pointing down the VPN. Only traffic destined for the classful network of the local adapter goes down the VPN. This may not be what you want. Checking "Disable class based route addition" means that classful route isn't added to your machine when the VPN starts up, and you'll need to add the appropriate routes for networks that should be routed through the tunnel. But, the option "Disable class based route addition" is available ONLY for Windows 7. How can I do something like that for Windows XP or Vista since they don't have that option? I have searched about for that but, no solution yet.

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  • Using Openfire for distributed XMPP-based video-chat

    - by Yitzhak
    I have been tasked with setting up a distributed video-chat system built on XMPP. Currently my setup looks like this: Openfire (XMPP server) + JingleNodes plugin for video chat OpenLDAP (LDAP server) for storing user information and allowing directory queries Kerberos server for authentication and passwords In testing with one set of machines (i.e. only three), everything works as expected: I can log in to Openfire and it looks up the user information in the OpenLDAP database, which in turn authenticates my user with Kerberos. Now, I want to have several clusters, so that there is a cluster on each continent. A typical cluster will probably contain 2-5 servers. Users logging in will be directed to the closest cluster based on geographical location. Something that concerns me particularly is the dynamic maintenance of contact lists. If a user is using a machine in Asia, for example, how would contact lists be updated around the world to reflect the current server he is using? How would that work with LDAP? Specific questions: How do I direct users based on geographical location? What is the best architecture for a cluster? -- would all traffic need to come into a load-balancer on each one, for example? How do I manage the update of contact lists across all these servers? In general, how do I go about setting this up? What are the pitfalls in doing this? I am inexperienced in this area, so any advice and suggestions would be appreciated.

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  • AI agents with FSM: a question regarding this

    - by Prog
    Finite State Machines implemented with the State design pattern are a common way to design AI agents. I am familiar with the State design pattern and know how to implement it. However I have a question regarding how this is used in games to design AI agents. Please consider a class Monster that represents an AI agent. Simplified it looks like this: class Monster{ State state; // other fields omitted public void update(){ // called every game-loop cycle state.execute(this); } public void setState(State state){ this.state = state; } // irrelevant stuff omitted } There are several State subclasses that implement execute() differently. So far classic State pattern. Here's my question: AI agents are subject to environmental effects and other objects communicating with them. For example an AI agent might tell another AI agent to attack (i.e. agent.attack()). Or a fireball might tell an AI agent to fall down. This means that the agent must have methods such as attack() and fallDown(), or commonly some message receiving mechanism to understand such messages. My question is divided to two parts: 1- Please say if this is correct: With an FSM, the current State of the agent should be the one taking care of such method calls - i.e. the agent delegates to the current state upon every event. Correct? Or wrong? 2- If correct, than how is this done? Are all states obligated by their superclass) to implement methods such as attack(), fallDown() etc., so the agent can always delegate to them on almost every event? Or is it done in some other way?

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  • Must all AI states be able to react to any event?

    - by Prog
    FSMs implemented with the State design pattern are a common way to design AI agents. I am familiar with the State design pattern and know how to implement it. How is this used in games to design AI agents? Consider a simplified class Monster, representing an AI agent: class Monster { State state; // other fields omitted public void update(){ // called every game-loop cycle state.execute(this); } public void setState(State state){ this.state = state; } // irrelevant stuff omitted } There are several State subclasses implementing execute() differently. So far, classic State pattern. AI agents are subject to environmental effects and other objects communicating with them. For example, an AI agent might tell another AI agent to attack (i.e. agent.attack()). Or a fireball might tell an AI agent to fall down. This means that the agent must have methods such as attack() and fallDown(), or commonly some message receiving mechanism to understand such messages. With an FSM, the current State of the agent should be the one taking care of such method calls - i.e. the agent delegates to the current state upon every event. Is this correct? If correct, how is this done? Are all states obligated by their superclass to implement methods such as attack(), fallDown() etc., so the agent can always delegate to them on almost every event? Or is it done in some other way?

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  • What are the "Navigation Properties" in this data model for?

    - by d03boy
    I've been wondering how to properly set up many-to-many relationships in ASP.NET MVC 2 using Linq2Sql for quite some time now. I found this blog post that seems to have a similar model layout as mine. If you take a look at the first screenshot showing the data model you can see that each model has "Navigation Properties" at the bottom of it. What exactly is this and why don't my models have them? I have the proper foreign keys put in to place. Most specifically, I am looking at the relationship between the Article and Category models since that is the only many-to-many relationship that I see and that's what I'm trying to model. Obviously I use an intermediary joining table between these two tables but I am having trouble understanding the proper methodology for modeling that relationship and I'm not finding this information anywhere on The Google.

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  • Surrogate key for date dimension?

    - by Navin
    There are 2 school of thoughts : Use surrogate key preferbly in the format of YYYYMMDD as this will always be sequential. Eliminate Date dimension surrogate key and use actual date instead. My Questions to experts on dimension modeling are : 1> Which design would you prefer and why ? 2> How should we handle unknown values in each of the cases, Can we simply place NULL in Fact table for unknown dates as Foreign Key can be NULL (if no why)? 3> If we need to partition fact table on date column ,how would we achieve that in case 1. I am inclined towards using actual date and using NULL to represent UNKNOWN dates in fact table , as date related validation on fact can be done without need to look in to dimension table.

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  • Implementing simple business model in Haskell

    - by elmes
    Supose we have a very simple model: Station has at least one Train Train has at least two Stations The model has to allow to check what stations any given train visits and to check what trains visit a particular station. How to model it in Haskell? I am a Haskell newbie, so please correct me: once an object is created, you cannot modify it - you can only make a new object based on that one (~immutability). Am I right? If so, I'll have to create a lot of temporary variables with semi-initialized objects (during deserialization or even in unit tests). Basically what I need is an example of modeling domain classes in Haskell - after reading "Learn you a haskell.." I still have no idea how to use this language.

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  • Cross-referencing UML models in VS 2010

    - by cheaster
    I am just starting to explore/use the UML modeling support in Visual Studio 2010 Umltimate. I have created two model projects within a single solution. Let's call them Model A and Model B. I have some data types (classes) defined in Model B. I want to use them as return types for operations in Model A. However, I cannot figure out how to make the types defined in Model B show up in Model A when attempting to set return type on an operation. Any help/suggestions would be greatly appreciated! Thanks!

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  • 12.10 update breaks NFS mount

    - by TarekEldeeb
    I've just upgraded to the latest 12.10 beta. Rebooted twice. The problem is with the NFS folders not mounting, here's a verbose log. # mount -v myserver:/nfs_shared/tools /tools/ mount: no type was given - I'll assume nfs because of the colon mount.nfs: timeout set for Mon Oct 1 11:42:28 2012 mount.nfs: trying text-based options 'vers=4,addr=192.168.0.22,clientaddr=192.168.0.109' mount.nfs: mount(2): No such file or directory mount.nfs: trying text-based options 'addr=192.168.0.22' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Timed out mount.nfs: trying text-based options 'vers=4,addr=192.168.0.22,clientaddr=192.168.0.109' mount.nfs: mount(2): No such file or directory mount.nfs: trying text-based options 'addr=192.168.0.22' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Timed out mount.nfs: trying text-based options 'vers=4,addr=192.168.0.22,clientaddr=192.168.0.109' mount.nfs: mount(2): No such file or directory mount.nfs: trying text-based options 'addr=192.168.0.22' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Timed out mount.nfs: trying text-based options 'vers=4,addr=192.168.0.22,clientaddr=192.168.0.109' mount.nfs: mount(2): No such file or directory mount.nfs: trying text-based options 'addr=192.168.0.22' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Timed out mount.nfs: trying text-based options 'vers=4,addr=192.168.0.22,clientaddr=192.168.0.109' mount.nfs: mount(2): No such file or directory mount.nfs: trying text-based options 'addr=192.168.0.22' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Timed out mount.nfs: trying text-based options 'vers=4,addr=192.168.0.22,clientaddr=192.168.0.109' mount.nfs: mount(2): No such file or directory mount.nfs: trying text-based options 'addr=192.168.0.22' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Timed out mount.nfs: trying text-based options 'vers=4,addr=192.168.0.22,clientaddr=192.168.0.109' mount.nfs: mount(2): No such file or directory mount.nfs: trying text-based options 'addr=192.168.0.22' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Timed out mount.nfs: trying text-based options 'vers=4,addr=192.168.0.22,clientaddr=192.168.0.109' mount.nfs: mount(2): No such file or directory mount.nfs: trying text-based options 'addr=192.168.0.22' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Timed out mount.nfs: trying text-based options 'vers=4,addr=192.168.0.22,clientaddr=192.168.0.109' mount.nfs: mount(2): No such file or directory mount.nfs: trying text-based options 'addr=192.168.0.22' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Timed out mount.nfs: trying text-based options 'vers=4,addr=192.168.0.22,clientaddr=192.168.0.109' mount.nfs: mount(2): No such file or directory mount.nfs: trying text-based options 'addr=192.168.0.22' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Timed out mount.nfs: Connection timed out My IP is 109, the server is 22. Just before the last upgrade, I was able to mount normally. Other PCs on my network are able to mount too, it's not a server issue. How can I analyse the problem? Certain log files? Any help?

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  • Is component-based design an architectural pattern or design pattern?

    - by xEnOn
    When using the component-based paradigm in game development with engines like Unity, is component-based design an architectural pattern, or a design pattern? Can I even say that component-based design is my "main" architectural pattern for my game? I see architectural patterns as being more high-level than design pattern. The component-based design in game development's context (like with Unity engine) seems to fit as an architectural pattern to me. However, on some sites, I read that component-based design is a behavioural pattern, much like other behavioural design patterns, and not so much like an architectural pattern like MVC.

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  • Linux - File was deleted and then reappeared when folder was zipped

    - by davee9
    Hello, I am using Backtrack 4 Final, which is a Linux distro that is Ubuntu based. I had a directory that contained around 5 files. I deleted one of the files, which sent it to the trash. I then zipped the directory up (now containing 4 files), using this command: zip -r directory.zip directory/ When I then unzipped directory.zip, the file I deleted was in there again. I couldn't believe this, so I zipped up the directory again, and the file reappeared again but this time could not be opened because the operating system said it didn't exist or something. I don't remember the exact error, and I cannot make this happen again. Would anyone happen to know why a file that was deleted from a directory would reappear in that directory after it was zipped up? Thank you.

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  • Difference between Claims vs OAuth

    - by Venki
    What is the difference between Claims based authentication vs What is provided by OAuth. I am looking for conceptual difference and not technical difference. When do I choose Claims over OAuth and vice versa. Claims based authentication is proposed by Microsoft and build on top of WS-Security. But OAuth is more a open source protocol that is being proposed to allow fetching resources from different portals based on a security token. Claims also has this concept of token (SAML encoded or X509 certificates). I am trying to understand when do I choose Claims over OAuth and vice versa. Thanks

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  • Best VPS based in UK?

    - by jimbo
    I am on the hunt for a new VPS supplier based in the UK, I was loving the look and service provided by Media Temple, and was going to go down that route but would prefer something held in the UK. Any suggestions more than welcome...

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  • apache mod_cache in v2.2 - enable cache based on url

    - by Janning
    We are using apache2.2 as a front-end server with application servers as reverse proxies behind apache. We are using mod_cache for some images and enabled it like this: <IfModule mod_disk_cache.c> CacheEnable disk / CacheRoot /var/cache/apache2/mod_disk_cache CacheIgnoreCacheControl On CacheMaxFileSize 2500000 CacheIgnoreURLSessionIdentifiers jsessionid CacheIgnoreHeaders Set-Cookie </IfModule> The image urls vary completely and have no common start pattern, but they all end in ".png". Thats why we used the root in CacheEnable / If not served from the cache, the request is forwarded to an application server via reverse proxy. So far so good, cache is working fine. But I really only need to cache all image request ending in ".png". My above configuration still works as my application server send an appropriate Cache-Control: no-cache header on the way back to apache. So most pages send a no-cache header back and they get not cached at all. My ".png" responses doesn't send a Cache-Control header so apache is only going to cache all urls with ".png". Fine. But when a new request enters apache, apache does not know that only .png requests should be considered, so every request is checking a file on disk (recorded with strace -e trace=file -p pid): [pid 19063] open("/var/cache/apache2/mod_disk_cache/zK/q8/Kd/g6OIv@woJRC_ba_A.header", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) I don't want to have apache going to disk every request, as the majority of requests are not cached at all. And we have up to 10.000 request/s at peak time. Sometimes our read IO wait spikes. It is not getting really slow, but we try to tweak it for better performance. In apache 2.4 you can say: <LocationMatch .png$> CacheEnable disk </LocationMatch> This is not possible in 2.2 and as I see no backports for debian I am not going to upgrade. So I tried to tweak apache2.2 to follow my rules: <IfModule mod_disk_cache.c> SetEnvIf Request_URI "\.png$" image RequestHeader unset Cache-Control RequestHeader append Cache-Control no-cache env=!image CacheEnable disk / CacheRoot /var/cache/apache2/mod_disk_cache #CacheIgnoreCacheControl on CacheMaxFileSize 2500000 CacheIgnoreURLSessionIdentifiers jsessionid CacheIgnoreHeaders Set-Cookie </IfModule> The idea is to let apache decide to serve request from cache based on Cache-control header (CacheIgnoreCacheControl default to off). And before simply set a RequestHeader based on the request. If it is not an image request, set a Cache-control header, so it should bypass the cache at all. This does not work, I guess because of late processing of RequestHeader directive, see https://httpd.apache.org/docs/2.2/mod/mod_headers.html#early I can't add early processing as "early" keyword can't be used together with a conditional "env=!image" I can't change the url requesting the images and I know there are of course other solutions. But I am only interested in configuring apache2.2 to reach my goal. Does anybody has an idea how to achieve my goal?

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