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  • 2d terrain generation in real time

    - by Skoder
    Hey, I'm trying to create a game similar to this (Note:When you click 'play', there are SFX in the game which you can't seem to turn off, so you may want to check volume). In particular, I'm interested in knowing how the 'infinite' landscape is generated. Are there any tutorials/articles describing this? I came across procedural generation, but I'm not quite sure what topics I should be looking for (or if it's even procedural generation). (I'm using C#, but I don't mind the language as I assume the theory behind it remains the same) Thanks for any suggestions

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  • Intel turbo boost - in reality

    - by gisek
    I have an Intel i7-3630QM processor in my laptop. Its speed is supposed to be from 2.4 to 3.4 GHz in turbo boost mode. In reality, will it ever run all cores on full speed (3.4GHz mentioned above) at the same time? I heard somewhere that this additional 1GHz is shared between all cores in laptops. If the boost is 1GHz per core it's pretty impressive (over 40% speed up). What does it really look like? How long can a processor run in turbo mode?

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  • Why is windows 7 marking all my extra RAM as "hardware reserved"?

    - by pinkmuppet
    I have a new HP Z800 Workstation, running Windows 7 Enterprise 64 bit. The machine has 4GB of RAM -- windows reported 1.99GB available, 2GB was "hardware reserved". I added another 2 GB and windows reports that there is 6GB of physical RAM, but now 4GB is "hardware reserved". The BIOS sees the full RAM amount as well. The video card is an nVida Quadro FX 580, so it shouldn't be using any shared memory at all. whats going on? Z800 Specs are here.

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  • Installing a new SQL Server instance fails

    - by Rubio
    I've previously in my setup installed SQL Server Express 2005. Now I've switched to SQL Server Express 2008. I updated the command line parameters to those documented for the latter. If the comp already has SQL Server Express 2008 installed, my installer should create a new instance. The command line parameters are as follows: /ACTION=Install /FEATURES=SQLEngine /QS /INSTANCENAME=ABCD /SECURITYMODE=SQL /SAPWD=CunningPassword The requested instance name does not exist on the target machine. This will end in an error -2068643838. The logs show the following error: "No features were installed during the setup execution. The requested features may already be installed." If I remove the /QS parameter and try to install interactively, I'll get as far as the Feature Selection page. The UI shows three options, Instance Features, Shared Features and Redistributable Features. Whatever I select, clicking Next results in the same error (There are validation errors on this page). Any ideas anyone? Thanks, -- Rubio

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  • CentOS: revert python version back to original

    - by NP
    Hi all, I installed python 2.6 using the instructions here on CentOS 5.4. However I realized it was a bad move and I need to revert back to 2.4, which was there originally. Can anyone guide me on how to undo what I did here? In particular, I am not sure how to undo this: Configure ld to find your shared libs: $ cat /etc/ld.so.conf.d/opt-python2.5.conf /opt/python2.5/lib (hit enter) (hit ctrl-d to return to shell) $ ldconfig I tried removing the alias and the symlink and even re-aliasing python to /usr/bin/python, but when I try to install an RPM i get this error: error: Failed dependencies: libpython2.4.so.1.0 is needed by ... Thanks in advance.

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  • Social-Networking Startup, Hosting Plan

    - by pws5068
    I've created a social networking community which is soon ready to release, and I'm trying to decide on a type of hosting plan. I have considered options such as VPS and Reseller plans. I anticipate (or hope for at least) a significant amount of traffic/bandwidth in the not-too-distant future. If I open a reseller, will I receive the same amount of server lag during busy hours that I do with a shared account? How significant is the profit margin with the reseller option? Aside from generalized "configurability", what advantages merit purchasing a VPS? Is there anything stopping me from reselling space on a VPS account? Features I need Include: PHP, MySql, Unlimited Domains, Ruby on Rails, Remote Database Connections

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  • How to recover Virtual Machines in Virtualbox?

    - by Bruce Connor
    For some reason, all of a sudden, all virtual machines are gone from the User Interface in virtual box. I suspect CCleaner has something to do with it, but that's not the point. Both the virtual hardisks and the .xml files for the machines are still in their respective folders. How can I use them to get my virtual machines back into virtualbox? I tried simply creating a new machine from the old virtual hardisks, and it worked with the ubuntu guest, but not with the windows one. Plus, it'd be nice to get my old machines back instead of having to create new ones, that would keep me from having to fix some shortcuts as well as reconfigure shared folders and other stuff. Thanks EDIT:Running Windows. [Solved]

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  • How do I make "simple" throughput servlet-filter?

    - by Tommy
    I'm looking to create a filter that can give me two things: number of request pr minute, and average responsetime pr minute. I already got the individual readings, I'm just not sure how to add them up. My filter captures every request, and it records the time each request takes: public void doFilter(ServletRequest request, ...() { long start = System.currentTimeMillis(); chain.doFilter(request, response); long stop = System.currentTimeMillis(); String time = Util.getTimeDifferenceInSec(start, stop); } This information will be used to create some pretty Google Chart charts. I don't want to store the data in any database. Just a way to get current numbers out when requested As this is a high volume application; low overhead is essential. I'm assuming my applicationserver doesn't provide this information.

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  • Trouble using opaque pointers in Objective C++

    - by morgancodes
    The answer to this quesion explains that opaque pointers are a good way to include C++ member variables in an Objective C++ header. I'm getting compile errors when trying to follow the example. Here's the relevant code from my header, with the corresponding compiler errors shown as comments: struct ADSR_opaque; // error: forward declaration of 'struct ADSR_opaque' @interface LoopyPulser : NSObject{ float _pulseRate; UInt32 tickInterval; UInt32 step; InMemoryAudioFile * audioFilePlayer; ADSR_opaque* env; // error: expected specifier-qualifier-list before 'ADSR_opaque' Pattern * pattern; float loopLengthRatio; float volume; } Is there something simple I'm doing wrong here?

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  • Multiple WAN interfaces in same subnet on Sonicwall NSA220?

    - by Ttamsen
    (eta salutation, which keeps getting eaten.) Hi, all. I see a bunch of related questions, so I'm hesitant to ask, but: I have a situation where I have a Sonicwall NSA220 serving as firewall/router for two internal subnets to two external WAN connections. In some locations this is two separate ISPs. In others, it's the same ISP but with multiple circuits. The problem is that one ISP has been unable to provide unique subnets for each WAN interface. Is there any possibility that I might be able to bond the two WAN interfaces into a single virtual interface, and then use source-routing to get internal subnets communicating out the appropriate physical interface? Or even just use traffic-shaping to give each internal network appropriate shared bandwidth? I haven't found anything in the docs, but it seemed like it might be worth asking. Thanks for any help! -Steve.

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  • Thread Synchronisation 101

    - by taspeotis
    Previously I've written some very simple multithreaded code, and I've always been aware that at any time there could be a context switch right in the middle of what I'm doing, so I've always guarded access the shared variables through a CCriticalSection class that enters the critical section on construction and leaves it on destruction. I know this is fairly aggressive and I enter and leave critical sections quite frequently and sometimes egregiously (e.g. at the start of a function when I could put the CCriticalSection inside a tighter code block) but my code doesn't crash and it runs fast enough. At work my multithreaded code needs to be a tighter, only locking/synchronising at the lowest level needed. At work I was trying to debug some multithreaded code, and I came across this: EnterCriticalSection(&m_Crit4); m_bSomeVariable = true; LeaveCriticalSection(&m_Crit4); Now, m_bSomeVariable is a Win32 BOOL (not volatile), which as far as I know is defined to be an int, and on x86 reading and writing these values is a single instruction, and since context switches occur on an instruction boundary then there's no need for synchronising this operation with a critical section. I did some more research online to see whether this operation did not need synchronisation, and I came up with two scenarios it did: The CPU implements out of order execution or the second thread is running on a different core and the updated value is not written into RAM for the other core to see; and The int is not 4-byte aligned. I believe number 1 can be solved using the "volatile" keyword. In VS2005 and later the C++ compiler surrounds access to this variable using memory barriers, ensuring that the variable is always completely written/read to the main system memory before using it. Number 2 I cannot verify, I don't know why the byte alignment would make a difference. I don't know the x86 instruction set, but does mov need to be given a 4-byte aligned address? If not do you need to use a combination of instructions? That would introduce the problem. So... QUESTION 1: Does using the "volatile" keyword (implicity using memory barriers and hinting to the compiler not to optimise this code) absolve a programmer from the need to synchronise a 4-byte/8-byte on x86/x64 variable between read/write operations? QUESTION 2: Is there the explicit requirement that the variable be 4-byte/8-byte aligned? I did some more digging into our code and the variables defined in the class: class CExample { private: CRITICAL_SECTION m_Crit1; // Protects variable a CRITICAL_SECTION m_Crit2; // Protects variable b CRITICAL_SECTION m_Crit3; // Protects variable c CRITICAL_SECTION m_Crit4; // Protects variable d // ... }; Now, to me this seems excessive. I thought critical sections synchronised threads between a process, so if you've got one you can enter it and no other thread in that process can execute. There is no need for a critical section for each variable you want to protect, if you're in a critical section then nothing else can interrupt you. I think the only thing that can change the variables from outside a critical section is if the process shares a memory page with another process (can you do that?) and the other process starts to change the values. Mutexes would also help here, named mutexes are shared across processes, or only processes of the same name? QUESTION 3: Is my analysis of critical sections correct, and should this code be rewritten to use mutexes? I have had a look at other synchronisation objects (semaphores and spinlocks), are they better suited here? QUESTION 4: Where are critical sections/mutexes/semaphores/spinlocks best suited? That is, which synchronisation problem should they be applied to. Is there a vast performance penalty for choosing one over the other? And while we're on it, I read that spinlocks should not be used in a single-core multithreaded environment, only a multi-core multithreaded environment. So, QUESTION 5: Is this wrong, or if not, why is it right? Thanks in advance for any responses :)

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  • How do I change HOSTNAME on an Ubuntu server?

    - by BryanWheelock
    I'm attempting to change the hostname on my shared server with Slicehost so I can setup Postfix as a null client. I edited /etc/hosts and after reboot, the hostname is still incorrect. What am I doing wrong? username@mail Fri Jul 01 13:01:32 ~ $ sudo cat /etc/hostname mail.domain1.com username@mail Fri Jul 01 13:01:45 ~ $ cat /etc/hosts 127.0.0.1 localhost localhost.localdomain 208.78.100.198 mail.domain1.com username@mail Fri Jul 01 13:02:13 ~ $ hostname -f pop.where.secureserver.net I also intend to add another domain to this server, how do I configure this correctly.

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  • Windows Remote-App Server 2012 Office 2013 User Settings not saved

    - by dave
    I have a Windows Server 2012 with RemoteApps enabled. It's running the latest Patches etc. It has Office 2013 installed and Excel and Word are shared to all users. Now I got the Problem that after each Reboot all User Settings are lost. I have a few users who pin previously opened Documents so they dont need to remember all Paths and those are all gone after Reboot. Also last opened Documents is empty and after a Server reboot it brings the office 2013 Window for First time setup where it asks if you want to connect to skydrive and all that. In the RemoteApps Collection I enabled a Userprofile-Drive 100GB drive E: for Storing User profile data. There is a Domain of course and there is no GPO Preventing the user from Storing settings etc. We also got an older Terminal Server 2003 in the same Domain where this is not happening. Any ideas why this is happening that all the Settings are lost after Reboot?

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  • Different output by df and du

    - by user1263746
    I have an old RHEL 5.5 Box, When I fire df -kh I see that /var is of 49 GB with 100 % usage. But then I go inside the /var cd /var and I fire du -kh I see that only total 300 MBs are used. I am not able to get it. Is is possible that this partition is shared with different partition? I see that /opt is also of 49 GB. I think that they are same partition. I need to free /var to start mysql but there is hardly anything to be deleted. Any pointers?

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  • Troubles uploading big pics to Picassa when pics are on NAS

    - by Bascy
    Hi all, I'm working from Vista a laptop on a WLAN, my pictures are all on a shared (samba) network drive on a FreeNAS system, which has a wired network connection to the WLAN router (DLink 655). I'v noticed that when i try to upload pics to picassa, and select files from the network share the pics won't upload successfully. If i first copy them locally (on the laptop) and then upload them to picassa, everything works fine. If i try to copy smaller pics (<500kB) it doesnt go wrong Anybody know what is going wrong here?

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  • Sharepoint Services 3.0: 403 Forbidden fun

    - by gravyface
    Can't get to the Administration or the "companyweb" site itself; was working up to a week ago. Old threads, blog posts, etc. indicate that there was an issue with a KB update but was resolved when .NET Framework 2.0 SP1 was deployed/installed. Running Process Monitor, I can see a lot of PATH NOT FOUND','NAME NOT FOUND for c:\inetpub\companyweb\Default.aspx, \_themes\ice\...\foo.css, etc. for the w3wp.exe process on CreateFileorQueryOpenoperations. These files do not exist in the location specified. I don't recall these files actually existing in that folder, but I believe they're "created" when requested, pulled in from Common Files/Shared or whatever, in typically-awesome Microsoft Web architecture land (</rant>). Besides reinstalling (which I'm sure will be as much fun as migrating from one server to another was), anyone know what's going on? Google-fu has alluded me.

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  • Cannot access Windows 7 share from Windows XP

    - by artfulrobot
    I have a new Windows 7 machine named PAP44 in the PAP workgroup. The networking is set to "Work" mode for the wired LAN. I have a couple of users and I've shared a folder and set it so both users can read/write. Confusingly for me, rather than sharing just that folder (as I'm used to with older versions of Windows) it appears to be sharing a path (\\pap44\users\...\myFolder) From another machine on the LAN, running XP, when I go to \\PAP44\Users I'm asked for a username and password, but neither of the usernames+passwords work. It just jumps back to the username and password dialogue, except that the username I entered gets prefixed with PAP44\ My end goal is to get my Debian/Ubuntu machines to be able to access this share, but first of all I thought I'd try to get it working in Windows, after all, that's supposed to be easy! Is there another step? (PS. I am not a "hit and run" case!)

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  • Rake don't know how to build task?

    - by Schroedinger
    Using a rake task to import data into a database: file as follows namespace :db do desc "load imported data from csv" task :load_csv_data => :environment do require 'fastercsv' require 'chronic' FasterCSV.foreach("input.csv", :headers => true) do |row| Trade.create( :name => row[0], :type => row[4], :price => row[6].to_f, :volume => row[7].to_i, :bidprice => row[10].to_f, :bidsize => row[11].to_i, :askprice => row[14].to_f, :asksize => row[15].to_i ) end end end When attempting to use this, with the right CSV files and the other elements in place, it will say Don't know how to build task 'db:import_csv_data' I know this structure works because I've tested it, I'm just trying to get it to convert to the new values on the fly. Suggestions?

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  • plotting results of hierarchical clustering ontop of a matrix of data in python

    - by user248237
    How can I plot a dendrogram right on top of a matrix of values, reordered appropriately to reflect the clustering, in Python? An example is in the bottom of the following figure: http://www.coriell.org/images/microarray.gif I use scipy.cluster.dendrogram to make my dendrogram and perform hierarchical clustering on a matrix of data. How can I then plot the data as a matrix where the rows have been reordered to reflect a clustering induced by the cutting the dendrogram at a particular threshold, and have the dendrogram plotted alongside the matrix? I know how to plot the dendrogram in scipy, but not how to plot the intensity matrix of data with the right scale bar next to it. Any help on this would be greatly appreciated.

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  • Slight network lag on Small Business Server 2008 R2

    - by Sir.Nathan Stassen
    I recently upgraded a network from a SBS 2003 server to a SBS 2008 R2 Server. Both I and users have noticed a slight delay in network applications and browsing network drives on the new server. It is minor, maybe a second or two at most. However I am wondering if anyone knows of anyway to optimize the networking to service requests sooner to the workstations. The network is running a 1 gig network with some 100 meg devices (mainly network printers). All workstations are XP SP3 Network software runs out of a shared folder mapped as a network drive, no sql databases. Server is a Dell Poweredge T610 with plenty of ram, cpu power, and storage.

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  • OSX 10.6 integration into NIS/netgroup/automount infrastructure

    - by mdpc
    I have an existing infrastructure where accounts are maintained under NIS (yp) with no local unix accounts. Also, all the standard maps including hosts, mail aliases, netgroups, etc...are maintained in this form. Extensive use of the UNIX/Linux automounter with items scattered over the network on NFS servers. There are NO ACLs on any local or shared files. All mail needs to use basically the nullclient sendmail configuration feeding into a different system. I now have a requirement to integrate an Apple OSX 10.6 system into this environment and make it run seamlessly. My initial reading and second-hand information seems to indicate that this may not be possible on the native OSX 10.6 system. I'm concerned. Any ideas as to how to accomplish this task and make everybody happy? Thanks PS: I have never used an Apple OSX system.

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  • SQL Server 2008 No process is on the other end of the pipe

    - by Matt
    I've recently been having some issues with SQL Server 2008 on our server. We only have one website running at the moment, but it seems at random that the following error occurs. A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe.) I don't understand this error, or what's causing it. Any help would be appreciated. When this error does occur all it takes to fix it is to restart the MSSQLSERVER service. But I need to fix the underlying problem first.

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  • Kerio group calendaring private/public functionality

    - by bsigrist
    We are considering a change of email servers and Kerio Connect is attractive. However, I am concerned about calendaring functionality. I found an old forum post that states the question well: "We want to create a single public calendar that everyone can see - using Windows XP/Outlook 2003/KOC 6.4.1. We want a way for people to put an entry in their own personal calendar and some how mark it so the entry auto add's or syncs with the public one. If an entry is private it wouldn't sync to the shared public calendar... Has anyone ever heard of a way to do this - in any way with any software?" This is a high priority feature, so if Kerio cannot do this, we may consider Exchange. Does Exchange provide functionality like that described?

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  • MVC Page not showing up, 404 not found

    - by mwright
    I have a very simple MVC site that is returning a 404 not found error when trying to load a page at the very beginning. I'm looking for some direction to troubleshoot this problem since there is really nothing to go on from the error message. The error I'm getting is: Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly. Requested URL: /Views/Other/Index.aspx Below I have included the code for the various pieces, routing rules are default: routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "Home", action = "Index", id = UrlParameter.Optional} // Parameter defaults ); The site is using nested MasterPages, not sure if this is involved with the problem but trying to include as much detail as possible. I have: Controllers OtherController Views: Shared Folder: Site.Master Other Folder: Other.Master Index.aspx Site.Master Code: <%@ Master Language="C#" Inherits="System.Web.Mvc.ViewMasterPage" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title> <asp:ContentPlaceHolder ID="TitleContent" runat="server" /> </title> </head> <body> <div> <asp:ContentPlaceHolder ID="MainContent" runat="server"> </asp:ContentPlaceHolder> </div> </body> </html> Other.Master Code: <%@ Master Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewMasterPage" %> <asp:Content ID="OtherTitle" ContentPlaceHolderID="TitleContent" runat="server"> OTHER PAGE - MASTER TITLE <asp:ContentPlaceHolder ID="OtherPageTitle" runat="server"> </asp:ContentPlaceHolder> </asp:Content> <asp:Content ID="OtherContent" ContentPlaceHolderID="MainContent" runat="server"> Some other content. <asp:ContentPlaceHolder ID="PageContent" runat="server"> </asp:ContentPlaceHolder> </asp:Content> Index.aspx Code: <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Other/Other.Master" Inherits="System.Web.Mvc.ViewPage" %> <asp:Content ID="IndexTitle" ContentPlaceHolderID="OtherTitle" runat="server"> Home </asp:Content> <asp:Content ID="IndexContent" ContentPlaceHolderID="OtherContent" runat="server"> Index content </asp:Content> OtherController Code namespace MVCProject.Controllers { public class OtherController : Controller { // // GET: /Member/ public ActionResult Index() { // Have also tried: // return View("Index", "Other.Master"); return View(); } } }

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  • Configuring Apache for multiple clients

    - by Chris_K
    Last week I had a question here about suexec / suphp but I tried to accomplish too much. I'm going to narrow the scope a bit and try again. I'd like to configure a LAMP server to host multiple clients. I'd like it to seem (from the client's viewpoint) just like any other shared hosting environment. Web sites in their home directory, no need to muck around with file ownerships to get pages served, etc. It would seem that a configuration that involves suexec and suphp is the way to go(?) I'm specifically looking for a current/modern guide on how to accomplish this (I'll be using CentOS if it matters) and I'm afraid I need more than a link to Apache docs. Are there any good How-To's out there? The few I've found have been pretty out of date, but it is quite possible my search was weak.

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