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  • 2D game big background images for maps

    - by WhiteCat
    Update: this question is general, not specific to Sprite Kit or a single language/platform. I'm toying with Sprite Kit with an idea to make a 2D side-scroller. Now the backgrounds for the maps are going to be hand-drawn and surely bigger than retina display, so the maps could span more than 1 screen in both axis. I imagine loading such a huge image could mean trouble and I don't plan to use tiling. I'm not sure how Sprite Kit splits images bigger than max texture size, if it does. I could split the images myself and use more sprites for each part of the background. What is the usual way to handle this?

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  • Optimization of a Hybrid Pagination Scheme

    - by Kaustubh Karkare
    I'm working on a Web Application using node.js in which I'm building a partial copy of the database on the client-side to decrease the load on my server. Right now, I have a function like this (expressed as python-style pseudocode, but implemented in JavaScript): get(table_name,primary_key): if primary_key in cache[table_name]: return cache[table_name][primary_key] else: x = get_data_from_server(table_name,primary_key) # socket.io return cache[table_name][primary_key] = x While this scheme works perfectly well for caching individual rows, I'd like to extend it to support the creation of paginated tables ordered according to the primary_key, and loading additional data using the above function for only the current and possibly the adjacent pages. Now, I don't want to keep the list of primary keys on the server to be retrieved every time I need to change the page (which, for reasons beyond the scope here, will be very frequent), and keeping it on the client side, subject to real-time create/delete events from the server, doesn't seem that good an idea, even after compression (using ranges, instead of individual values). What is the best way to calculate which items are to be displayed on a random page, minimizing the space requirements & the need for communication with the server?

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  • Postfix connects to wrong relay?

    - by Eric
    I am trying to set up postfix on my ubuntu server in order to send emails via my isp's smtp server. I seem to have missed something because the mail.log tells me: Jan 19 11:23:11 mediaserver postfix/smtp[5722]: CD73EA05B7: to=<[email protected]>, relay=new.mailia.net[85.183.240.20]:25, delay=6.2, delays=5.7/0.02/0.5/0, dsn=4.7.0, status=deferred (SASL authentication failed; server new.mailia.net[85.183.240.20] said: 535 5.7.0 Error: authentication failed: ) The relay "new.mailia.net[85.183.240.20]:25" was not set up by me. I use "relayhost = smtp.alice.de". Why is postfix trying to connect to a different server? Here is my main.cf: # See /usr/share/postfix/main.cf.dist for a commented, more complete version # Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian default # is /etc/mailname. #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = no # TLS parameters smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key smtpd_use_tls=yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for # information on enabling SSL in the smtp client. myhostname = mediaserver alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases mydestination = mediaserver, localhost.localdomain, , localhost relayhost = smtp.alice.de mynetworks = 127.0.0.0/8 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all myorigin = /etc/mailname inet_protocols = all sender_canonical_maps = hash:/etc/postfix/sender_canonical smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_password smtp_sasl_security_options = noanonymous Output of postconf -n: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no config_directory = /etc/postfix inet_interfaces = all inet_protocols = ipv4 mailbox_size_limit = 0 mydestination = mediaserver, localhost.localdomain, , localhost myhostname = mediaserver mynetworks = 127.0.0.0/8 myorigin = /etc/mailname readme_directory = no recipient_delimiter = relayhost = smtp.alice.de sender_canonical_maps = hash:/etc/postfix/sender_canonical smtp_generic_maps = hash:/etc/postfix/generic smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_password smtp_sasl_security_options = noanonymous smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes

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  • What are good JS libraries for game dev? (HTML5)

    - by acidzombie24
    If i decide to write a simple game both text and graphical (2d) what libs may i use? Assuming we are using a HTML5 compatible browser. The main things i can think of Rendering text on screen Animating sprites (using images/css) Input (capturing the arrow keys and getting relative mouse positions) Perhaps some preloading resource or dynamically loading resources and choosing order Sound (but i am unsure how important this will be to me at first). Perhaps with mixing and chaining sounds or looping forever until stop. Networking (low priority) to connect a user to another or to continuously GET data without multiple request (i know this exist but i dont know how easy it is to setup or use. But this isnt important to me. Its for the question).

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  • Animating isometric sprites

    - by Mike
    I'm having trouble coming up with a way to animate these 2D isometric sprites. The sprites are stored like this: < Game Folder Root /Assets/Sprites/< Sprite Name /< Sprite Animation /< Sprite Direction /< Frame Number .png So for example, /Assets/Sprites/Worker/Stand/North-East/01.png Sprite sheets aren't really viable for this type of animation. The example stand animation is 61 frames. 61 frames for all 8 directions alone is huge, but there's more then just a standing animation for each sprite. Creating an sf::Texture for every image and every frame seems like it will take up a lot of memory and be hard to keep track of that many images. Unloading the image and loading the next one every single frame seems like it will do a lot of unnecessary work. What's the best way to handle this?

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  • viewing fbx files in windows via xna 4.0

    - by user17753
    I've made some models in Blender and exported them in Autodesk fbx format. I'm trying to view them using XNA 4.0 Refresh. Loading them isn't much an issue, but I'm not familiar enough with XNA 4.0 to, well basically I want to load in the model at say the origin (0,0,0) world coordinates, and then rotate and/or zoom the camera about the world coordinates origin as well so that I can test the model. Typically the mouse, and maybe some arrow keys for zooming/rotating the camera. Anyways, this seems like a simple task and I shouldn't have to re-invent this, isn't there a skeleton code somewhere for this kind of thing for XNA 4.0? I couldn't find a solid example for this on the web. I found a couple that seemed like they might work for xbox, but I'm trying to do this on windows only. Anyways, just looking to be pointed in the right direction on this one, thanks.

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  • How can I repair a corrupt kernel if no others are installed?

    - by Willi Ballenthin
    I've been running Ubuntu 10.04 on my laptop for quite some time. When I went to boot it up this morning, BAM! kernel panic (which immediately lead to human panic) when loading the kernel. So I've spent much of the day troubleshooting, and my current theory is that the FS is fine, but that the kernel image may be corrupt. Let's go with this current theory for the sake of this question, as I am interested how it is done. How can I replace the kernel image if I have no bootable kernels? Can I boot to a 10.04 live CD, copy the the vmlinuz-2.6.3x... to the HD and go from there? Wouldn't I want to copy the initramfs as well, but configured for the desktop system? Can I generate this from the live CD?

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  • Installing Ubuntu Server 11.04

    - by Jackson Walters
    Trying to install Ubuntu Server 11.04 on an 64-bit AMD machine. The install goes fine until after "Loading additional components", then I get a blank purple screen with a responsive cursor at the bottom. I've looked everywhere and can't find anything (all the documentation seems to be on the desktop version). I have a wireless card installed if that makes a difference, don't why it would. This happens regardless of whether nomodeset is set. Here's what it looks like (as described): Specs: CPU - 64-bit AMD Sempron 140 @ 2.7Ghz RAM - 1Gb DDR3 1333 HDD - WD 500Gb 7200RPM SATA 3.0Gb/s Mobo - Foxconn M61PMP-K Wireless Card - Rosewill RNX-G300LX

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  • How to load Image in C# and set properties of the Picture Box

    - by SAMIR BHOGAYTA
    Create a C# application drag a picture Box, four buttons and open file dialog on the form. Write code on btn_browse Button click ----------------------------------------- private void btn_browse_Click(object sender, System.EventArgs e) { try { OpenFileDialog open = new OpenFileDialog(); open.Filter = "Image Files(*.jpg; *.jpeg; *.gif; *.bmp)|*.jpg; *.jpeg; *.gif; *.bmp"; if (open.ShowDialog()==DialogResult.OK) { pictureBox1.Image = new Bitmap(open.FileName); } } catch (Exception) { throw new ApplicationException("Failed loading image"); } } Write code on btn_StretchImage Button click ------------------------------------------------ private void btn_StretchImage_Click(object sender, System.EventArgs e) { pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage; } Write code on btn_AutoSize Button click ------------------------------------------------- private void btn_AutoSize_Click(object sender, System.EventArgs e) { pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize; } Write code on btn_CenterImage Button click -------------------------------------------------- private void btn_CenterImage_Click(object sender, System.EventArgs e) { pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.CenterImage; }

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  • DTLoggedExec 1.0.0.2 Released

    - by Davide Mauri
    These last days have been full of work and the next days, up until the end of july, will follow the same ultra-busy scheme. This makes the improvement of DTLoggedExec a little bit slower than what I desire, but nonetheless Friday I’ve been able to relase an updated version of the tool that fixes a bug and add a very convenient option to make even more straightforward the creationg of execution logs: [bugfix] Fixed a bug that prevented loading packages from SSIS Package Store [new] Added support for {filename} placeholder in both Data Flow Profiling and CSV Log Provider The added feature allow to generate DataFlow profile logs and CSV logs that has the same name of the package that generated them, es: DTLoggedExec.exec /FILE:”MyPackage.dtsx” /LPA:"FILE=C:\Log\{filename}_{date}_{time}.dtsCSVLog" Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • Dell M6800 with Windos 8.1 on part-1, cannot run if Ubuntu and Fedora are 2nd and 3rd OSsen?

    - by user289334
    On a Dell M6800 machine that has Windows 8 pre-installed, I upgraded to 8.1, then I loaded Ubuntu 14.04 then Fedora 20 the only way I could, that is in "Legacy" BIOS Mode. BTW the Ubuntu install was unable to complete but Fedora did, and left all working, 2 bootable OSsen, with Grub2 from Fedora doing the boots, but Windows 8.1 is now "invisible". I have run Boot-Repair but info is not useful. It tells me to switch to UEFI which, on M6800, doesn't work with this (too long-winded to explain why here). I need to have the Grub2 configs "see" the original Windows 8.1 partition, with BIOS switched to "Legacy". BTW various posts have said make switch to UEFI to boot from, say, USB-stick or DVD; this is wrong, you can't - UEFI mode only allows boot from the Windows partition, which it says has a Windows 8.1 on it, which doesn't boot. Basically, if you have actually succeeded in loading Ubuntu 14.04 or Fedora 20 on an M6800, which comes with pre-loaded Windows 8, you will know how I fix this.

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  • Abandoment to blame for the last JavaScript file not always being loaded?

    - by Larsenal
    I have a code snippet for an app that users are loading as a 3rd party script on their site. The general sequence is as follows: Site loads http://www.example.com/foo.js foo.js does stuff 1 to 2 seconds later, foo.js loads bar.js Now in a perfect world, I'd want to see matching counts for the calls to foo.js and bar.js. However, bar.js loads only about 94% of the time. I'm wondering how much of this discrepancy might be attributable to site abandonment given the fact that bar.js is delayed by 1 or 2 seconds. I posted here instead of StackOverflow since I think it's more a question about what would be typical time on page when users abandon the page.

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  • How do I reuse a state machine in a slightly different way?

    - by JoJo
    Problem I have a big state machine. The design requirements of the project have changed such that I need to re-use this state machine in another place. All the states remain the same in this new place, but a few states run slightly different stuff. What design pattern allows me to reuse this state machine? Motivation I am building a video player. It is modeled by a state machine with these states: stopped, loading, playing, paused, crashed, and some more... This video player needs to be used on two web pages. When the player crashes on the first page, it should show an error message below. If the player crashes on the second page, the error message should appear in the center of the video and pulsate a few times.

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  • Why does update-grub not find ubuntu 11.10?

    - by Klaynos
    I've recently installed ubuntu onto my laptop. With the intention of dual booting with windows 7. On installation Grub wasn't loading, the computer continued to boot straight into windows. I loaded a live cd, mounted the installed ubuntu partion (sda6) as /mnt/ and windows boot partition as /mnt/boot Following the second option here: http://ubuntuguide.net/how-to-restore-grub-2-after-reinstalling-windows-xpvistawin7 Through its entirety, so creating a new grub.cfg file. chroot /mnt update-grub Did not find ubuntu, just windows 7 and the windows recovery partition. Thinking this might be a weird quirk that as I was in ubuntu (all be it a live cd) it might not list ubuntu I restarted. Grub loaded but ubuntu was nowhere to be seen. How can I add ubuntu with Grub2? I could have fixed this myself in old grub but I'm pretty much in the dark here. Thanks

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  • Ubuntu multiple issues (blank screen)

    - by Donavon
    Computer Specs I am having difficulties, to get Ubuntu 11.10 to work. For the 11.10 version, if I click install, or if I click try Ubuntu, I only get a blank screen, that just stays there. If I use "nomodeset", it changes to a loading screen and after about 2 minutes it goes back to black screen - however, before it goes black, i get a few errors, like: bad target number, or passwd error mode (something like that). I've also tried (xforcevesa, i915.modeset=0, nomodeset, radeon.modeset=0, i915.modeset=1) I have also tried the alternate installation, which installed fine, however when I boot up, select it from "grub", it goes black. I did manage to install 10.04, however the screen resolution was 800x600 and I couldn't fix it to 16:9 (my resolution). I don't wanna use 10.04, because I would like the new one 11.10, and would like to use it. Any help would be GREATLY appreciated. Thank you

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  • memory and time intensive php task

    - by Goddard
    Sorry if this question has been asked before, but I couldn't find anything usable. I'm working on a project for a client and currently I have to loop through the users table which is about 3000 records and still growing. I have to do some calculations on a nightly basis which I am going to be using cron/php. The calculations script uses about 3.5mb of memory and takes about 1 second to run. When loading individual users my current php setup handles this fine, but if I try and loop through the user list my php script execution time runs out. I've read after doing some searching that I can make the page reload itself after each user calculation and just keep my previous place in the loop and this sounds like a good idea, but I wanted to hear some opinions from others that have handled similar situations and how you handled these types of tasks. Thanks.

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  • What are some ways to texture map a terrain?

    - by ApocKalipsS
    I'm working with XNA on a 3D Game, and I'm trying to have a proper and nice environnement. I actually followed a tutorial to create a terrain from a heightmap. To texture it, I just apply a grass texture on it and tile it a number of times. But what I want to do is to have a really realistic texturing, but also generate it automatically (for example if I want to use Perlin noise to generate a terrain and then texture it). I already learned about multi-texturing, loading a map file with different colors for different textures, but I don't think this is really efficient, for instance for cliffs or very steep areas it will tile a texture badly as it's a view from the top. (Also, I don't know how I'll draw roads or dirt paths with that.) I'm looking for an efficient solution to realistically texture mapping procedurally-generated terrain.

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  • Ubuntu boots into terminal

    - by DKuntz2
    When I turn on my computer (a CR-48), I keep loading tty1. I have tried xstart, and all I get is: Fatal server error: Could not create lock file in /tmp/.tX0-lock When I attempted to make the directory (both sudo and not), I received these two errors: sudo: Can't open /var/lib/sudo/don/tty2: Read-only file system (I've gotten other tty's for different virtual terminals) mkdir: cannot create directory '/tmp/tX0-lock': Read-only file system Before I got to the only terminal state, I had the computer moving a few files from a network server to the computer, I put it to sleep without stopping the transfers, and started the computer again away from my home network, and attempted to stop the transfers, the computer than restarted. Running sudo reboot puts me right back in the virtual terminal, and I can't get into any sort of x application.

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  • Blackscreen while installing 12.10

    - by Nalelvon
    everytime I try to install ubuntu 12.10 on my laptop i get a blackscreen after clicking on "install ubuntu", "try ubuntu without installation" or "ubuntu live" i tried it with nomodeset, nolapic and acpi=off too but nothing works. Sometimes i even get so a loading screen with nothing but "Ubuntu 12.10" and 4 dots in the middle, after that shortly a blackscreen appears with some text on it and then the complete blackscreen appears. As i tried with "no splash" instead of "quiet splash" it shows me something with graphic and determined in it but it was to fast away in a blackscreen to remember. Has someone any idea what I can do to get this working? Sry for my bad english i'm actually from germany. Sincerely Nalelvon

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  • upgrade from ubuntu 12.04 to 12.10 failed, now loads "grub rescue"

    - by Greg
    I attempted to upgrade from 12.04 to 12.10 last night. Installation seemed to go fine, and this morning I had a message like "restart now to complete installation". So I restart, get an initial "Loading Operating System ..." message, followed by "error: file not found. Then it kicks into "grub rescue" mode. Previously I have this running as a dual boot (window 7) and I just ran the upgrade to 12.10 via the update manager in ubuntu. Any ideas on what is going on here, or what the error means? I know my way around the command line, but this is above my pay grade. Thanks for any advice.

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  • How to design a game engine in an object-oriented language?

    - by chuzzum
    Whenever I try and write a game in any object-oriented language, the first problem I always face (after thinking about what kind of game to write) is how to design the engine. Even if I'm using existing libraries or frameworks like SDL, I still find myself having to make certain decisions for every game, like whether to use a state machine to manage menus, what kind of class to use for resource loading, etc. What is a good design and how would it be implemented? What are some tradeoffs that have to be made and their pros/cons?

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  • No dual boot menu

    - by Christian Galo
    I formatted all of my disk and installed Ubuntu on my computer. I immediately partitioned, from an Ubuntu live CD, my hard drive, creating an NTFS partition for for Windows. After successfully doing so, I went on to install windows 8.1. After I installed Windows 8 in the new partition and turned off my PC and turned it on again the option to chose which Operating system I wanted to use didn't appear, loading Windows like if Ubuntu didn't exist. How can I have the option to chose which operating system I want to run or at least from which partition to boot from when I start my computer? EVERYTHING IS OKAY WITH MY OPERATING SYSTEM The only thing I need is for ubuntu to appear as an option on the boot menus

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  • "From the Coal Face" - 1 - What ILDASM can reveal!

    - by TATWORTH
    In a place far, far away, there was a project where the Architect decided on using embedded TSQL in a Dot Net application, rather than use stored procedures. I located ILDASM.EXE (my Framework 3.5 version lives at C:\Program Files\Microsoft SDKs\Windows\v7.0A\bin on my home development PC) and created a shortcut to it in the SendTo folder. Now I could set about doing a simple demonstration to the Architect by taking one of the Dot Net EXE's with the embedded TSQL and sending it to ILDASM.  Since I had written most of the embedded TSQL, it was a matter of seconds before I located the embedded TSQL within the Exe. The TSQL that was supposed to be safely hidden within the EXE was easily located and and copied. (It should also be noted that we could have encrypted the stored procedures on loading them to the database.)

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  • Abandoment to blame?

    - by Larsenal
    I have a code snippet for an app that users are loading as a 3rd party script on their site. The general sequence is as follows: Site loads "http://www.example.com/foo.js" foo.js does stuff 1 to 2 seconds later, foo.js loads bar.js Now in a perfect world, I'd want to see matching counts for the calls to foo.js and bar.js. However, bar.js loads only about 94% of the time. I'm wondering how much of this discrepancy might be attributable to site abandonment given the fact that bar.js is delayed by 1 or 2 seconds. I posted here instead of StackOverflow since I think it's more a question about what would be typical time on page when users abandon the page.

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  • What is the right option of programming languages and tools for building our website?

    - by Goma
    We are 3 persons trying to build a large website which will be available in 3 languges. However, we will start with one language and with small idea then we are going to improve it and make it larger! What do you think the best tools and language that we should use? We are caring alot about the speed of loading the pages and tools that provide excellent qulaity with cheaper fees. Edit: We are graphic designers, so we did not choose the programming language yet. But we studied computer science and we have an idea but we found that this is the best place to ask the question and expect the right answer from you. Should we use ASP.NET for example? or PHP? We do not want an expesive option that will cost us alot in the future and we do not want to change the technology at least for the first 5 years. Thanks!

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