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• draw fog of war using shaders

  - by lezebulon

  I am making a RTS game, and I'd like some advice on how to best render fog of wars, given what I'm already doing. You can imagine this game as being a classic RTS like Age of Empires 2, where the fog of war will basically be handled by a 2D array telling if a given "tile" is explored or not. The specific things to consider here are : 1) I'm only doing a few draw calls to draw the whole screen, using shaders, and I'm not drawing "tile by tile" in a 2D loop 2) The whole map is much bigger than the screen, and the screen can move every frame or so In that case, how could I draw the fog of war ? I have no issue maintaining on the CPU-side a 2D array giving the fog of war for each tile, but what would be the best way to actually display it dynamically ? thanks!

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• Avatar (spoiler alert!)

  - by Dave Yasko

  This past weekend we finally saw “Avatar,” or as I like to call it “Dances with Smurfs.”  It was rather light on the story, heavy on the message, and incredibly well done.  The eye for detail is what blew me away, especially the visual distortion (presumably due to density) when the two atmospheres mixed.  The only thing I thought they might have missed was why so many (presumably) mammals had 6 appendages (4 arms + 2 legs) and breathed through passages near their clavicles, but the Na’vi (sp?) didn’t have/do either.  Also, James Cameron just loves to telegraph upcoming events: Riding the big red bird thing has only happened 5 times before – Sully is on the job.  The tree is going to download dying Ripley to her avatar body – Sully is going to do that too.  I’ve seen worse foreshadowing, but not in a long time. I give it 4 Papa Smurfs out of 5.

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• USB-creator: Error erasing device: Unknown or unsupported erase type

  - by Mike Williamson

  I created a live usb using usb-creator-gtk. I installed Ubuntu with it and all was good with the world. Now I am trying to use the same memory stick and create a live USB for 14.04 and I get the following error when trying to erase the disk. org.freedesktop.DBus.Python.gi._glib.GError: Traceback (most recent call last): File "/usr/lib/python3/dist-packages/dbus/service.py", line 707, in _message_cb retval = candidate_method(self, *args, **keywords) File "/usr/share/usb-creator/usb-creator-helper", line 239, in Format block.call_format_sync('dos', GLib.Variant('a{sv}', {'erase': GLib.Variant('s', '')}), None) gi._glib.GError: GDBus.Error:org.freedesktop.UDisks2.Error.Failed: Error erasing device: Unknown or unsupported erase type `' How can I fix this so I can create a new live USB?

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• Setup Convergence Address Book DisplayName Lookup

  - by user13332755

  At Convergence Address Book the default lookup for 'Display Name' is the LDAP attribute 'cn', which leads into confusion if you start to setup 'displayName' LDAP attributes for your users. LDAP User Entry with diaplyName attribute: This behavior can be controlled by the configuration file xlate-inetorgperson.xml. Change the default value of XPATH abperson\entry\displayname from 'cn' to 'displayName'. <convergence_deploy_location>/config/templates/ab/corp-dir/xlate-inetorgperson.xml Note: In case the user has no 'displayName' attribute in LDAP you might noticed '...' at the user entry, if found via 'mail' attribute.

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• Multiple Object Instantiation

  - by Ricky Baby

  I am trying to get my head around object oriented programming as it pertains to web development (more specifically PHP). I understand inheritance and abstraction etc, and know all the "buzz-words" like encapsulation and single purpose and why I should be doing all this. But my knowledge is falling short with actually creating objects that relate to the data I have in my database, creating a single object that a representative of a single entity makes sense, but what are the best practises when creating 100, 1,000 or 10,000 objects of the same type. for instance, when trying to display a list of the items, ideally I would like to be consistent with the objects I use, but where exactly should I run the query/get the data to populate the object(s) as running 10,000 queries seems wasteful. As an example, say I have a database of cats, and I want a list of all black cats, do I need to set up a FactoryObject which grabs the data needed for each cat from my database, then passes that data into each individual CatObject and returns the results in a array/object - or should I pass each CatObject it's identifier and let it populate itself in a separate query.

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• Grant a user permissions on www-data owned /var/www

  - by George Pearce

  I have a simple web server setup for some websites, with a layout something like: site1: /var/www/site1/public_html/ site2: /var/www/site2/public_html/ I have previously used the root user to manage files, and then given them back to www-data when I was done (WordPress sites, needed for WP Uploads to work). This probably isn't the best way. I'm trying to find a way to create another user (lets call it user1) that has permission to edit files in site1, but not site2, and doesn't stop the files being 'owned' by www-data. Is there any way for me to do this?

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• What naming anti-patterns exist?

  - by Billy ONeal

  There are some names, where if you find yourself reaching for those names, you know you've already messed something up. For example: XxxManager This is bad because a class should describe what the class does. If the most specific word you can come up with for what the class does is "manage," then the class is too big. What other naming anti-patterns exist? EDIT: To clarify, I'm not asking "what names are bad" -- that question is entirely subjective and there's no way to answer it. I'm asking, "what names indicate overall design problems with the system." That is, if you find yourself wanting to call a component Xyz, that probably indicates the component is ill concieved. Also note here that there are exceptions to every rule -- I'm just looking for warning flags for when I really need to stop and rethink a design.

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• General visual effects to meshes/entities

  - by Pacha

  I am trying to add some visual effects to some entities, meshes, or whatever you want to call them as they are looking pretty dull in my game right now. What I want to achieve is this: http://youtu.be/zox8935PLw0?t=36s (the "texture" gets disintegrated and then goes back to normal, covering the whole mesh.) Also I would like to know what is the best way to add effects like the one in the video to my game (for example, thunder effects, shattering, etc.) I know that I can do some things with shaders, but I haven't learned them too well and I am still in a beginner level. I am using Ogre3D, and GLSL for shaders. Thanks! Note: this is a screen-shot of my game, I want to apply the effect in the video to my main character):

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• Examples of interesting implementations of character stats?

  - by Tchalvak

  I've got this BBG going ( http://ninjawars.net ), and the character stats currently are simplistic. I'm looking to add a few stats to the current 1/2 (strength and maximum hitpoints, essentially). I've come up with: (strength (unchanged), speed, stamina, and some others that are somewhat interesting wildcard stats). However, I'm not satisfied with how boring the effects of some of these stats are, because they're very linear. Better stat, better effects of the stat, but the stats don't interact with each-other, there's no Rock-Paper-Scissors interaction, having more is always better all the time. So what I'd really like is to see examples of interesting character stats or effects of stats? Examples that I can think of off hand: Call of Cthulu's Insanity stat (things get really weird/chaotic if you start losing sanity) White Wolf stats, to a certain extent (the stats themselves have some basic effects, and all skills effectiveness base themselves off of stats as well) What are some other ways people have used stats to check out?

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• Flightradar24 Maps Global Air Traffic in Real Time

  - by Jason Fitzpatrick

  Flightradar24 is a real time flight tracking service that shows you where thousands of planes are at any given time. Whether you’re an aviation buff or just want to show a worried kid that mom’s flight is almost home, they have you covered. Flightradar24 is a free service that tracks flights using data from the FAA and ADS-B to display the status of flights across the globe. You can filter the information to see only certain planes, planes originating from certain airports, planes at various altitudes, and more. The interface is accessible via their web site as well as via iOS and Android devices. Hit up the link below to take it for a spin. Flightradar24 How To Create a Customized Windows 7 Installation Disc With Integrated Updates How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using?

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• How do functional languages handle random numbers?

  - by Electric Coffee

  What I mean about that is that in nearly every tutorial I've read about functional languages, is that one of the great things about functions, is that if you call a function with the same parameters twice, you'll always end up with the same result. How on earth do you then make a function that takes a seed as a parameter, and then returns a random number based on that seed? I mean this would seem to go against one of the things that are so good about functions, right? Or am I completely missing something here?

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• AutoSSH for a robust tunnel

  - by Budric

  I'm trying to start an ssh tunnel from A to B and have it run despite things like: period network/wifi drops on A and remote server reboot on B. My ssh tunnel starts using upstart script on A with event start on (net-device-up IFACE=eth0) I've found autossh which is supposed to handle these kinds of things, but had some trouble getting it to work. The upstart executes: autossh -M 0 -2qTN -o "ServerAliveInterval 30" -o "ServerAliveCountMax 2" -L 5678:somehost:5678 user@B However when I log into B and kill -9 that tunnel session, autossh just exits with "Connection to B closed by remote host." That's not what I expected autossh to do. Any advice on how to set this up? Any GUI service monitoring utilities out there that essentially display a green light if a service is up? Thanks.

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• Is it worth to learn programming for windows?

  - by Herr Kaleun

  as a programmer, i was skeptical about (Microsoft) desktop software back in the early 2000s (i was a kid then) and yet, i was right. So i advanced to PHP in 2004 and began working on Web applications. When i look at the software world today, i really can't understand, how software for Microsoft or call it, "windows" should have a future. Is it still worth, learning it? I have a strong feeling that, in about 3-4 years, mac will have the dominance in the Personal Computer market. If i am wrong, please correct me. Thanks!

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• Removing date from Google SERP

  - by Tom Gullen

  We are going through our site analysing the SEO. I find that sometimes on a google results page, some results show a date, others don't. Example (from same query): I prefer the result not to have the date in it, as 20 Oct 2009 probably has an adverse effect on the clickability of the result. Is this Google putting it in? Or the page itself? Or a combination of both (IE, if over a certain age, it includes date). The two URLs are: http://www.scirra.com/forum/perlin-noise-plugin_topic38498.html http://www.scirra.com/forum/dungeon-maze-generator_topic40611.html Any way to remove the dates? I'm thinking, if the age of the thread is 4 months don't display the date on the page, then Google might not find a date reference for it?

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• How Easy is it to Code In-Built Videos?

  - by Alan Parker

  First time poster so please don't bite my head off. Basically, I'm having a site built for me and I don't really know anything about coding but I'm not too sure if I trust my web developer. I asked him recently about adding a feature where I could display built-in videos like the following page - http://www.ejot.co.uk/buildingfasteners.odl and he quoted me quite a high amount for it. I just wanted to double check with you guys whether this is a difficult feature to add in and whether it justifies a reasonable amount of money on top of what I'm already paying him. Thanks in advance for your help, Alan

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• Texturing a mesh generated from voxel data

  - by Minja

  I have implemented the Marching Cubes algorithm to display an isosurface based on voxel data. Currently, it is displayed with triplanar texturing. I'm working with unity, so I have a material with the triplanar shader attached. Now, the whole isosurface is rendered using this material. And thats my problem: I want the texture to represent the voxel data. I'm storing a material value for every point in the grid, and based on this value, I want the texture of the isosurface to change. Sadly, I have no clue how to do this. So if the voxel is sand, I want sand to be displayed; if it's stone, then there should be stone. Right now, everything is displayed as sand. Thanks in advance!

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• Unity Gwibber lens doesn't work 12.10

  - by sayth

  Is there something Specific I am needing to do to get the unity Gwibber/Social lens to work. I have gone into system settings and added google account, twitter account and facebook account. When I go to the lens however nothing is displayed at all its blank. I search any term including my name and it states nothing to display. So it remains blank. If I start gwibber itself it has found and does see my accounts new messages and posts. Any hints on what to try?

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• Finding right bug tracker web application

  - by FullmetalBoy

  I'm looking for a bug tracking system (similiar as http://www.mantisbt.org) with these following requirements: Requirement specifications are: Upload picture and different files without any limitaton of the file's space. If user belong to a specific group or businesss group, the GUI:s logotype should be changed into group's logotype after the user has entered user name and password. All user use the same database with different GUI. Right information of unassigned, modified and resolved bug case will be displayed based on what group or business group that the user is assigned to. All information will display after the user has logged in. Enable to create 1 or more super user (administrator) and regular user. Right user with right group or business group will retrieve right information. Non functional requirement: The bugging tracker take place in a webbapplication. All information must use web browser to view all information.

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• WebCast: WebCenter Portal, April 03rd, 2012

  - by rituchhibber

  Our next WebCenter Portal webcast will be on April 03rd, 2012. This WebCast will help you to prepare yourself for the WebCenter Portal Certified Implementation Specialist EXAM. Webcast Details: Date Topic Speaker Web Call Details Intercall Details  April 03rd                WebCenter Portal   Refresh     Course      Yannick Ongena, InfoMentumWebCenter Portal Specialized Partner    Join Webcast Dial-in numbers:CC/SP: 1579222/9221 Time: 12:00 -15:00 CET Break around 13:30 Conference ID/Key: 9729232/0304 For more details, please click here.

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• Facing problem with "gtk.RESPONSE_OK" in the simple-player quickly tutorial

  - by sumit_gt

  I am fairly new to both quickly and Python. I am facing several problems while learning to use quickly from the following tutorial on the Ubuntu developers site: http://developer.ubuntu.com/resources/app-developer-cookbook/multimedia/creating-a-simple-media-player/ The following error I'm unable to understand: Traceback (most recent call last): File "/home/sumit/Sumit/simple-player/simple_player/SimplePlayerWindow.py", line 36, in on_openbutton_clicked if response==gtk.RESPONSE_OK: NameError: global name 'gtk' is not defined I realize that I am supposed to import something, so I tried to add import gtk which it didn't work and it gave the following error: from gtk import _gtk /usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:40: Warning: g_type_get_qdata: assertion `node != NULL' failed from gtk import _gtk I have followed every step of the tutorials so far. But there is no mention of any other imports other that "prompts" and "os". Please help. Contribution of Agmenor, facing the same problem: I also tried to replace the text if response == gtk.RESPONSE_OK: by if response == Gtk.RESPONSE_OK: (notice the capital G). This gives another error: AttributeError: 'gi.repository.Gtk' object has no attribute 'RESPONSE_OK'

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• Upgrading from raring to saucy broke many of my fonts in certain applications

  - by valadil

  I upgraded from raring to saucy over the weekend. Two of my applications, dzen2 and xmobar, won't display the fonts they used to. I'd mostly been using fixed and 6x12. xmobar doesn't run with these fonts. dzen2 shows some generic font I can't identify. I can change the size but not the font. The only exception is terminus. I looped over xlsfonts and piped them into a dzen2 to see what still worked. Variants of terminus were fine. Everything else used the same generic looking font face. No idea why. I haven't found any other applications with font issues since the update, but I haven't tried too hard to look either.

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• Standby Problem, PC can not enter Standby mode

  - by Leon95

  I have a problem with the Standby function: My Computer does not enter the Standby mode with Ubuntu 14.04LTS. If I remeber me right it, works with Ubuntu 13.10 but this Version was not long installed on this PC. Now when i press Standby in the menu or on my Keyboard the Display turns black for a few seconds, then some messages appear for a very short moment on the screen. After that, the the log-in screen appear. Two times I was able to enter Standby but the other times it fails. Tecnical Data about my PC: Ubuntu 14.04 with all Updates main storage: 3,8GiBprocessor: Intel® Core™ i3-2330M CPU @ 2.20GHz × 4 graphic: Intel® Sandybridge Mobile graphic board: NVIDA GEFORCE GT 555M CUDA 1GB Dual Boot System with win7 x64Bit Medion P6812 Laptop Here is the message output: Usally I got only a half of the screen filled with messages like that. When I filmed it it was much more. I dont know, maybe this is a Bug.

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• Installed nvidia driver, activated it, and now Unity is gone. No bars, menus, nothing

  - by Noel

  I installed the nvidia driver (installed the ubuntu-x-swat ones, updated them, got the updates for them, installed bumblebee. I restarted everytime I did those steps, so no, i don't simply need to 'restart X'. I tried to run things using bumblebee, but bumblebee was like "can't access GPU driver". So I ran nvidia-settings, it said the drivers weren't in use, so I ran "sudo nvidia-xconfig", then restarted. Now, my login screen looks differently than it did before: it asks me if I want to load: "GNOME, GNOME - no effects, Cairo Dock - GNOME, System Default, or Ubuntu" when I log in, but WORST OF ALL: i no longer have any kind of GNOME/unity GUI. There are no title bars above any windows, no close/minimize/maximize buttons. The unity bar is gone, and will not show up when I call it. And the top status bar is also no longer there.

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• Loops, Recursion and Memoization in JavaScript

  - by Ken Dason

  Originally posted on: http://geekswithblogs.net/kdason/archive/2013/07/25/loops-recursion-and-memoization-in-javascript.aspxAccording to Wikipedia, the factorial of a positive integer n (denoted by n!) is the product of all positive integers less than or equal to n. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120. The value of 0! is 1. We can use factorials to demonstrate iterative loops and recursive functions in JavaScript.  Here is a function that computes the factorial using a for loop: Output: Time Taken: 51 ms Here is the factorial function coded to be called recursively: Output: Time Taken: 165 ms We can speed up the recursive function with the use of memoization.  Hence,  if the value has previously been computed, it is simply returned and the recursive call ends. Output: Time Taken: 17 ms

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• How to create a 3D world with 2D sprites similar to Ragnorak online?

  - by Romoku

  As far as I know Ragnorak Online is a 3D game world with 2D sprites overlayed. I would like to use this style in a game I am making in Unity, so I would like the player to be able to select little square tiles on the terrain. There are a couple routes I could take such as using a bunch of cubic polygons and linking them together or using one big map. The former approach doesn't seem to make any sense if the world is not flat as polygons wouldn't be reused often. The goal is to break down a 3D polygon into tiles which is heard to wrap my head around. I believe using something like an interval tree or array would be appropriate to store the rectangle grid, but how would I display a rectangle around the selection the player has his mouse over on the polygon terrain itself? Here is a screenshot. Here is a gameplay video. Here is the camera usage.

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