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• Can WebGL be used to create a tile-based multi-layer scrolling platform game?

  - by Nicholas Hill

  I've found WebGL (based on OpenGL) to be a fiendish and unforgiving framework for those learning to write HTML5-based games. Despite the presence of many examples on how to get started, I'm really struggling to understand how I could simply load a bunch of images and render them to a canvas quickly using WebGL. My specific scenario involves trying to render a map using a bespoke but simple multi-layered tile engine, where each value in a three dimensional array points to the image to use for that location in the rendered image. Think "Sonic the Hedgehog" via tilesets, tiles, maps, layers, sprites etc. Can anyone enlighten me: 1) How can I load an image that I can use as a texture in WebGL? 2) How can I dynamically select an image at run time and draw it at any co-ordinate, that I also select at run time?

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• Functional vs. Non-Functional Requirements vs Design ideas in an SRS

  - by Nicholas Chow

  For a school project, I had to create a SRS for a "fictional" application. However they did not show us what it exactly entails, and were very vague with explanations. The SRS asked of us has to have at least 5 functional requirements, 5 non functional requirements and 1 constraint. Now I have tried my best to make one however I there are still some uncertainties left, I hope you experts can tell me whether or not I am thinking in the right direction. I will keep on updating this posts as I have questions regarding requirements that are vague to me, thank you all in advance for making SRS more clear for me FR1 Registration of Organizer FR1 describes the registration of an Organizer on CrowdFundum FR1.1 The system shall display a registration form on the website. FR1.2 The system shall require a Name, Username, Document number passport/ID card, Address, Zip code, City, Email address, Telephone number, Bank account, Captcha code on the registration form when a user registers. FR1.3 The system shall check whether the Name, Username, Document number passport/ID card, Address, Zip code, City, Email address, Telephone number, Bank account, Captcha code are filled out correctly within 1 seconds after a user submits the registration form. FR1.4 The system shall display an error message containing: “Registration could not be completed” to the subscriber within 1 seconds after the system check of the registration form was unsuccessful. FR1.5 The system shall send a verification email containing a verification link to the subscriber within 30 seconds after the system check of the registration form was successful. FR1.6 The system shall add the newly registered Organizer to the user base within 5 seconds after the verification link was accessed. Questions: FR1.1 Is this a functional requirement, or have I incorporated design idea in it by using "shall display on website". If so what would be a better way to write it? FR1.2 Is this better written in one requirement, or should I write each condition as a seperate requirement? FR1.3-1.5 Are these functional requirements or did I mix some non functional elements in it? How is it better phrased? FR1.3-1.6 Are these all correct functional requirements? As in free of ambiguity, complete, implementation free etc.

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• Given two sets of DNA, what does it take to computationally "grow" that person from a fertilised egg and see what they become? [closed]

  - by Nicholas Hill

  My question is essentially entirely in the title, but let me add some points to prevent some "why on earth would you want to do that" sort of answers: This is more of a mind experiment than an attempt to implement real software. For fun. Don't worry about computational speed or the number of available memory bytes. Computers get faster and better all of the time. Imagine we have two data files: Mother.dna and Father.dna. What else would be required? (Bonus point for someone who tells me approx how many GB each file will be, and if the size of the files are exactly the same number of bytes for everyone alive on Earth!) There would ideally need to be a way to see what the egg becomes as it becomes a human adult. If you fancy, feel free to outline the design. I am initially thinking that there'd need to be some sort of volumetric voxel-based 3D environment for simulation purposes.

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• System beeps on shutdown

  - by Nicholas Smith

  Very recently a couple of our systems have started making beeps on shutdown, we've not been able to isolate the exact time that they've been updated and it's occuring, but I've narrowed it down to being not pcspkr or snd_pcsp as both are blacklisted under modprobe, and rmmod'ed just to be sure. Now I'm a bit puzzled as I was under the impression those were the only two modules that could make the beep, is there a third lurking that I need to blacklist? Edit: I've copied the results of lsmod over on Pastebin.

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• Microformats, Reviews and Duplicate Content

  - by Nicholas

  Let's say I have a site that sells widgets, and the URL structure is like so: /[type-of-widget]/[sub-type]/[widget-name]/ So, a URL for a widget might be: /screwdrivers/philips-screwdrivers/acme-big-screwdriver/ We show reviews on the widget page, and use the appropriate microformat data so Google knows it's a review, etc. Now, what if I want to show random reviews in the "sub-type" and "type-of-widget" landing pages? Will Google ding me for duplicate content, or is it smart enough to know (based on microformat data/etc.) that this is not duplicate content?

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• How can I choose which menubar indicators are shown in 12.04?

  - by Nicholas Weininger

  I'd like to be able to tweak the set of shortcuts on the right side of the menubar in 12.04 (e.g. remove the email shortcut, remove the wifi shortcut on my laptop, add a lock screen shortcut so I can lock the screen with a single click rather than facing the choice between two clicks and Ctrl-Alt-L). Is this possible? The only thing I can find to configure in the settings is the date/time display.

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• Why do I get rows of zeros in my 2D fft?

  - by Nicholas Pringle

  I am trying to replicate the results from a paper. "Two-dimensional Fourier Transform (2D-FT) in space and time along sections of constant latitude (east-west) and longitude (north-south) were used to characterize the spectrum of the simulated flux variability south of 40degS." - Lenton et al(2006) The figures published show "the log of the variance of the 2D-FT". I have tried to create an array consisting of the seasonal cycle of similar data as well as the noise. I have defined the noise as the original array minus the signal array. Here is the code that I used to plot the 2D-FT of the signal array averaged in latitude: import numpy as np from numpy import ma from matplotlib import pyplot as plt from Scientific.IO.NetCDF import NetCDFFile ### input directory indir = '/home/nicholas/data/' ### get the flux data which is in ### [time(5day ave for 10 years),latitude,longitude] nc = NetCDFFile(indir + 'CFLX_2000_2009.nc','r') cflux_southern_ocean = nc.variables['Cflx'][:,10:50,:] cflux_southern_ocean = ma.masked_values(cflux_southern_ocean,1e+20) # mask land nc.close() cflux = cflux_southern_ocean*1e08 # change units of data from mmol/m^2/s ### create an array that consists of the seasonal signal fro each pixel year_stack = np.split(cflux, 10, axis=0) year_stack = np.array(year_stack) signal_array = np.tile(np.mean(year_stack, axis=0), (10, 1, 1)) signal_array = ma.masked_where(signal_array > 1e20, signal_array) # need to mask ### average the array over latitude(or longitude) signal_time_lon = ma.mean(signal_array, axis=1) ### do a 2D Fourier Transform of the time/space image ft = np.fft.fft2(signal_time_lon) mgft = np.abs(ft) ps = mgft**2 log_ps = np.log(mgft) log_mgft= np.log(mgft) Every second row of the ft consists completely of zeros. Why is this? Would it be acceptable to add a randomly small number to the signal to avoid this. signal_time_lon = signal_time_lon + np.random.randint(0,9,size=(730, 182))*1e-05 EDIT: Adding images and clarify meaning The output of rfft2 still appears to be a complex array. Using fftshift shifts the edges of the image to the centre; I still have a power spectrum regardless. I expect that the reason that I get rows of zeros is that I have re-created the timeseries for each pixel. The ft[0, 0] pixel contains the mean of the signal. So the ft[1, 0] corresponds to a sinusoid with one cycle over the entire signal in the rows of the starting image. Here are is the starting image using following code: plt.pcolormesh(signal_time_lon); plt.colorbar(); plt.axis('tight') Here is result using following code: ft = np.fft.rfft2(signal_time_lon) mgft = np.abs(ft) ps = mgft**2 log_ps = np.log1p(mgft) plt.pcolormesh(log_ps); plt.colorbar(); plt.axis('tight') It may not be clear in the image but it is only every second row that contains completely zeros. Every tenth pixel (log_ps[10, 0]) is a high value. The other pixels (log_ps[2, 0], log_ps[4, 0] etc) have very low values.

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• Is there a good XP like windows explorer for windows Vista?

  - by Brett Ryan

  I'm still refusing to go to Windows Vista and now Windows 7 mainly due to the windows explorer, I find it cumbersome and hard to use exclusively with a keyboard. I use XP file explorer in the most basic view, the address bar at the top and files always in list view underneath. The reason I do this is because I'm almost blind and do everything from the keyboard and don't touch the mouse whilst navigating through files, this is because I can type "L[ENTER]D[Enter]B[Enter]" and know that I'm in "c:\documents and settings\Brett Ryan", and I can hit [Tab] once to go to the address bar to type in a folder. Can anyone suggest a replacement for windows explorer that brings back this basic navigational behavior?

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• User Profile cannot be loaded - Windows 7

  - by Ryan

  After uninstalling an HP Vector Mouse driver, then rebooting, when Windows tries to auto log me in, i get an error message saying tyhe following: The User Profile Service failed the Login. User Profile cannot be loaded. Due to the fact that it is the only account on this PC, I cannot even go into another account. I rebooted the machine several times, before going into Safe Mode with Networking. For some reason, I cannot create a new account whilst in safe mode (I think it is to do with UAC, nothing with UAC is clickable). Thus, I am stuck. I cannot get into my account, nor can I create a new one to copy files over to. Any ideas? Thanks in advance! Ryan EDIT: System Restore was, for some reason turned off. Thus, I cannot restore to a working point.

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• php-cgi cpu usage is super high

  - by Ryan Thompson

  I am getting constantly high and wildly fluctuating CPU usage % for php-cgi commands as seen via "top" on my Centos server.. I have a server density account and it seems that this is a common trend: User - PID - CPU % - MEM % - VSZ - RSS - TT - Stat - Started - Time - Command 500 - 6389 - 22.4 - 3 - 271136 - 32380 - ? - S - 20:26 - 0:40 - /usr/bin/php-cgi Seems there are about 6 or so of those records in my processes list at any given check-in. Any ideas what's causing this? I have fast_cgi installed and the module is loading.. Not sure why it isn't handling this though. Any help would be greatly appreciated! Ryan

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• iPhone 3G S sync services problem

  - by Ryan McCue

  When I try and synchronise my iPhone with iTunes, I get a dialog informing me that "syncing has been disabled on this computer". (I've never disabled syncing myself, and it worked perfectly fine a day ago) Music synchronises fine, as do videos, however, my contacts do not. Google Contacts no longer appears in the list to choose from, and the select box is empty. When I choose to re-enable syncing, iTunes informs me that "iTunes was unable to load provider data from Sync Services". I've followed several steps I've found on the internet, including deleting the C:\Users\Ryan\AppData\Roaming\Apple Computer\Sync Services directory, but to no avail. Any ideas on what could be causing this? Is there a Service (in the Windows-form-of-daemon sense) that I accidentally disabled?

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• Outlook DASL Filter - Custom Search

  - by Ryan B

  I'm trying to write a DASL filter to combine three queries: Get all mail with no category and no flag. ("urn:schemas-microsoft-com:office:office#Keywords" IS NULL AND "urn:schemas:httpmail:messageflag" IS NULL) Get all mail that is categorized as "Ryan" and flagged with a red "Today" flag. Don't know how to write this one. Get all mail that is uncategorized and flagged with a red "Today" flag. Don't know how to write this one. Once I have the individual queries, I will combine and OR them. I am stuck on how to filter the flag value.

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• In Windows 7 Home Premium, is it possible to grant a user account the "log on as a service" right and if so, how?

  - by Ryan Johnson

  The title says it all. I need to have the ability for a local user account to log on as a service on a computer running Windows 7 Home Premium. In Windows 7 Ultimate, this is accomplished by going to Control Panel - Administrative Tools - Local Security Policy and adding the user to the "Log on as a service" policy. In Home Premium, there is no Local Security Policy in the Control Panel. Is there another way to add the use to that policy (i.e. registry setting) or is my only recourse to upgrade the computer to Windows 7 Professional? Thanks in Advance, Ryan

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• Is it possible to install Canon EOS T3 Camera Drivers on Windows 7 Embedded

  - by Ryan Johnson

  I have a computer running Windows 7 Embedded. It's an embedded system that will be used in a industrial setting. It needs to be connected to a Canon EOS camera and download pictures from the camera. Other versions of windows come with the Canon drivers so Canon does not provide them as a download on their website. In the past, I had a similar issue with the "N" version of Microsoft Windows Starter and had to download the "Microsoft Media Feature Pack" which then installed the drivers. I attempted to install that on this device, but understandably it complains that its not applicable for this version of windows. So, is there there a feature pack or some other sort of download available that will install the camera drivers? Alternatively, is there some place to get the drivers and manually install them. Thanks in Advance, Ryan

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• iPhone 3G S sync services problem

  - by Ryan McCue

  When I try and synchronise my iPhone with iTunes, I get a dialog informing me that "syncing has been disabled on this computer". (I've never disabled syncing myself, and it worked perfectly fine a day ago) Music synchronises fine, as do videos, however, my contacts do not. Google Contacts no longer appears in the list to choose from, and the select box is empty. When I choose to re-enable syncing, iTunes informs me that "iTunes was unable to load provider data from Sync Services". I've followed several steps I've found on the internet, including deleting the C:\Users\Ryan\AppData\Roaming\Apple Computer\Sync Services directory, but to no avail. Any ideas on what could be causing this? Is there a Service (in the Windows-form-of-daemon sense) that I accidentally disabled?

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• How to code Microsoft Excel "Shift Cells Up" feature in SQL

  - by user293249

  Take a simple table like below: Column Headings: || Agent's Name || Time Logged In || Center || Row 1: Andrew || 12:30 PM || Home Base Row 2: Jeff || 7:00 AM || Virtual Base Row 3: Ryan || 6:30 PM || Test Base Now lets say that a single cell is deleted so the table now looks like this: Column Headings: || Agent's Name || Time Logged In || Center || Row 1: Andrew || 12:30 PM || Row 2: Jeff || 7:00 AM || Virtual Base Row 3: Ryan || 6:30 PM || Test Base Notice that "Home Base" is missing. Now in excel you can delete the cell and shift the rest so the finished product looks like below: Column Headings: || Agent's Name || Time Logged In || Center || Row 1: Andrew || 12:30 PM || Virtual Base Row 2: Jeff || 7:00 AM || Test Base Row 3: Ryan || 6:30 PM || And you can see we are left with a blank cell last row. How do I code this procedure of shifting the cells up in SQL? I've been struggling on this problem for weeks! Thank you!

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• Django many to many annotations and filters

  - by dl8

  So I have two models, Person and Film where they're in a many to many relationship. My goal is to grab a film, and output the persons that have also appeared in at least 10 films. For example I can get the count individually by: >>> Person.objects.get(short__istartswith = "Matt Damon").film_set.count() 71 However, if I try to filter all the actors of a particular film out: >>> Film.objects.get(name__istartswith="Saving Private Ryan").actors.all().annotate(film_count=Count('film')).filter(film_count__gte=10) [] it returns an empty set since if I manually look at everyone's film_count it's 1, even though an actor such as Matt Damon (as seen above) has been in 71 films in my db. As you can see with this query, the annotation doesn't work: >>> Film.objects.get(name__istartswith="Saving Private Ryan").actors.all().annotate(film_count=Count('film'))[0].film_count 1 >>> Film.objects.get(name__istartswith="Saving Private Ryan").actors.all().annotate(film_count=Count('film'))[0].film_set.count() 7 and I can't seem to figure out a way to filter it by the film_set.count()

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• Column variables in Excel?

  - by Ryan

  Let's say I have column A and Column B. Cells in Column A contain either "Y" or "N". How can I set the value of the cell in the corresponding row in Column B with a formula that detects if the cell's value = "N"? Not new to programming logic but to Excel formulas, thanks for your help. -Ryan

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• Adding Blogengine.net Javascript file references

  - by Ryan

  I have a new blogengine site up and want to set up syntax highlighting. The problem is that I have a few files (javascript and css) that I need to add the the head of the page, but there is no one page or masterpage. Does anyone one know where to write out these references so they will show up on all pages? Thanks Ryan

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• Can jQuery Coda-Slider rewrite the title of the page on tab change?

  - by Justin Bowers

  We are building a site with Coda-Slider and are wondering if its possible to change the title of the page when changing tabs (without having to refresh the page)? I'm not that great at jQuery yet (let alone straight javascript), so I'm not sure if this is even possible. We're using version 2.0 of Coda-Slider and loading the latest jQuery libraries from Google.

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• Today's Links (6/24/2011)

  - by Bob Rhubart

  Fusion Applications - How we look at the near future | Domien Bolmers Bolmers recaps a Logica pow-wow around Fusion Applications. Who invented e-mail? | Nicholas Carr IT apparently does matter to Nicholas Carr as he shares links to Errol Morris's 5-part NYT series about the origins of email. David Sprott's Blog: Service Oriented Cloud (SOC) "Whilst all the really good Cloud environments are Service Oriented," says Sprott, "it’s very much the minority of consumer SaaS that is today." Fast, Faster, JRockit | René van Wijk Oracle ACE René van Wijk tells you "everything you ever wanted to know about the JRockit JVM, well quite a lot anyway." Creating an XML document based on my POJO domain model – how will JAXB help me? | Lucas Jellema "I thought that adding a few JAXB annotations to my existing POJO model would do the trick," says Jellema, "but no such luck." Announcing Oracle Environmental Accounting and Reporting | Theresa Hickman Oracle Environmental Accounting and Reporting is designed to help companies track and report greenhouse emissions. Yoga framework for REST-like partial resource access | William Vambenepe Vambenepe says: "A tweet by Stefan Tilkov brought Yoga to my attention, 'a framework for supporting REST-like URI requests with field selectors.'" InfoQ: Pragmatic Software Architecture and the Role of the Architect "Joe Wirtley introduces software architecture and the role of the architect in software development along with techniques, tips and resources to help one get started thinking as an architect."

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• Google I/O 2010 - Where is the social web going next?

  Google I/O 2010 - Where is the social web going next? Google I/O 2010 - Where is the social web going next? Social Web 201 Adam Nash, Daniel Raffel, Chris Messina, Angus Logan, Ryan Sarver, Chris Cole, Kara Swisher (moderator) With the advent of social protocols like OAuth, OpenID and ActivityStrea.ms, it's clear that the web has gone social and is becoming more open. Adam Nash (LinkedIn), Daniel Raffel (Yahoo), Chris Messina (Google), Angus Logan (Microsoft), Ryan Sarver (Twitter), and Chris Cole (MySpace) will discuss the importance of such emerging technologies, how they've adopted them in their products and debate what's next. Kara Swisher will moderate. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 13 0 ratings Time: 01:07:35 More in Science & Technology

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• The best Bar on the globe is ... in Seoul/Korea

  - by Mike Dietrich

  As you know already sometimes I write about things which really don't have to do anything with a database upgrade. So if you are looking for tips and tricks and articles about that topic please stop reading now Actually I'm not a lets-go-to-a-bar person. I enjoy good food and a fine dessert wine afterwards. But last week in Seoul/Korea Ryan, our local host, did ask us after a wonderful dinner at a Korean Barbecue place if we'd like to visit a bar. I was really tired as I flew into Seoul overnight from Sunday to Monday arriving Monday early morning, getting shower, breakfast - and then a full day of very good and productive customer meetings. But one thing Ryan mentioned catched my immediate attention: The owner of the bar collects records and has a huge tube amp stereo system - and you can ask him to play your favorite songs. The bar is called "Peter, Paul and Mary" - honestly not my favorite style of music. And I even coulnd't find a webpage or an address - only that little piece of information on Facebook. But after stepping down the stairs to the cellar my eyes almost poped out of my head. This is the audio system: Enourmus huge corner horn loudspeakers from Western Electric. Pretty old I'd suppose but delivering an incredible present dynamics into the room. And plenty of tube equipment from Jadis, NSA Labs and Shindo Laboratories Western Electric 300B Limited amps from Tokyo. And the owner (I was so amazed I had simply forgotten to ask for his name) collects records since 40 years. And we had many wishes that night. Actually when we did enter Peter, Paul and Mary he played an old Helloween song. That must have been destiny. A German entering a bar in Korea and the owner is playing an old song by one of Germany's best heavy metal bands ever. And it went on with the Doors, Rainbow's Stargazer, Scorpions, later Deep Purple's Perfect Strangers, a bit of Santana, Carly Simon, Jimi Hendrix, David Bowie ...Ronnie James Dio's Holy Diver, Gary Moore, Peter Gabriel's San Jacinto ... and many many more great songs ... Of course we were the last guests leaving the place at 2am in the morning - and I've never ever had a better night in a bar before ... I could have stayed days listening to so many records  ... Thanks Ryan, that was a phantastic night! -Mike

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• Highlights from recent Yammer video

  - by Eric Jensen

  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} A few weeks back, Ryan Kennedy of Yammer gave a talk about Berkeley DB Java Edition. You can find it posted here on Alex Popescu's Blog, or go directly to the video post itself. It was full of useful nuggets of information, such as why they chose to use BDB JE, performance, and some tips & tricks at the end. At over 40 minutes, the video is quite long. Ryan is an entertaining speaker, so I suggest you watch all of it. But if you only have time for the highlights, here are some times you can sync to:  06:18 hear the Berkeley DB JE features that caused Yammer select it, including: replication auto leader election, failover configurable durability and consistency guarantees 23:10 System performance characteristics 35:08 Check out the tips and tricks for using Berkeley DB JE I know the Berkeley DB development team is very pleased that BDB JE is working out well for Yammer. We definitely encourage others out there to take note of this success, especially if your requirements are similar to Yammer's (which Ryan outlines at the beginning of his talk)

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• Favorite, Well-Known Characters as Pacman Ghosts [Humorous Image]

  - by Asian Angel

  Can you name them all? Note: Ryan has a complete list of all the characters at his Flickr page if you find any that you are unable to identify. Pacman Ghosts – Ryan “Dash” Coleman (Flickr) [via Neatorama] HTG Explains: What Is Two-Factor Authentication and Should I Be Using It? HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux

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