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  • Antenna Aligner Part 6: Little Robots

    - by Chris George
    A week ago I took temporary ownership of a HTC Desire S so that I could start testing my app under Android. Support for Android was not in my original plan, but when Nomad added support for it recently, I starting thinking why not! So with some trepidation, I clicked the Build for Android button on the Nomad toolbar... nothing. Hmm... that's not right, I was expecting something to build. After a bit of faffing around I finally realised that I hadn't read the text on the Android setup page properly (yes that's right, RTFM!), and I needed a two-part application identifier, separated by a dot. I did this (not sure what the two part thing is all about, that one my list to investigate!) After making the change, the Android build worked and created the apk file. I uploaded this to the device and nervously ran it... it worked!!!  Well, more or less! So, there was not splash screen, but this was no surprise because I only have the iOS icons and splash screen in my project at the moment. What was more concerning was the compass update didn't seem to be working. I suspect this is a result of using an iOS specific option in the Phonegap compass watcher. Another thing to investigate. I've also just noticed that the css gradient background hasn't worked either... These issues aside, it was actually more successful than I was expecting, so happy days! Right, lets get Googling...   Next time: Preparing for submission to the App Store! :-)

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  • What tools do you use when generating markup from mockups?

    - by Paul
    So I endeavor to spend most of time on the app server side of things but time to time I need to get my hands dirty and generate markup/css/js from a wireframe or mockup. As far as tools go, Ive found browsershots and Litmus app helpful and of course, vm's as well for checking things out live in ie-{6,7,8}. Otherwise I do the heavy lifting in vim. For generating new markup thats not tied to a target design I think some of the css frameworks & tools like sass look useful but Im skeptical of their utility when needing to generate markup to match a photoshop design. So what tips / tools do you keep in your markup generating utility belt when building solid markup from designs? My list so far: Browsershots Browserlab.adobe.com Haml / Less / Sass (not used but will probably explore)

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  • How to select the first ocurrence in the auto-completion menu by pressing Enter?

    - by janoChen
    Every time there's is a pop up menu. I select the first occurrence and press enter but nothing happens (the word is not completed with he selected occurrence). The only way is to press Tab until you reach the term for a second time. Is there a way of selecting the first occurrence pressing Enter (or other Vim hotkey)? My .vimrc: " SHORTCUTS nnoremap <F4> :set filetype=html<CR> nnoremap <F5> :set filetype=php<CR> nnoremap <F3> :TlistToggle<CR> " press space to turn off highlighting and clear any message already displayed. nnoremap <silent> <Space> :nohlsearch<Bar>:echo<CR> " set buffers commands nnoremap <silent> <M-F8> :BufExplorer<CR> nnoremap <silent> <F8> :bn<CR> nnoremap <silent> <S-F8> :bp<CR> " open NERDTree with start directory: D:\wamp\www nnoremap <F9> :NERDTree /home/alex/www<CR> " open MRU nnoremap <F10> :MRU<CR> " open current file (silently) nnoremap <silent> <F11> :let old_reg=@"<CR>:let @"=substitute(expand("%:p"), "/", "\\", "g")<CR>:silent!!cmd /cstart <C-R><C-R>"<CR><CR>:let @"=old_reg<CR> " open current file in localhost (default browser) nnoremap <F12> :! start "http://localhost" file:///"%:p""<CR> " open Vim's default Explorer nnoremap <silent> <F2> :Explore<CR> nnoremap <C-F2> :%s/\.html/.php/g<CR> " REMAPPING " map leader to , let mapleader = "," " remap ` to ' nnoremap ' ` nnoremap ` ' " remap increment numbers nnoremap <C-kPlus> <C-A> " COMPRESSION function Js_css_compress () let cwd = expand('<afile>:p:h') let nam = expand('<afile>:t:r') let ext = expand('<afile>:e') if -1 == match(nam, "[\._]src$") let minfname = nam.".min.".ext else let minfname = substitute(nam, "[\._]src$", "", "g").".".ext endif if ext == 'less' if executable('lessc') cal system( 'lessc '.cwd.'/'.nam.'.'.ext.' &') endif else if filewritable(cwd.'/'.minfname) if ext == 'js' && executable('closure-compiler') cal system( 'closure-compiler --js '.cwd.'/'.nam.'.'.ext.' > '.cwd.'/'.minfname.' &') elseif executable('yuicompressor') cal system( 'yuicompressor '.cwd.'/'.nam.'.'.ext.' > '.cwd.'/'.minfname.' &') endif endif endif endfunction autocmd FileWritePost,BufWritePost *.js :call Js_css_compress() autocmd FileWritePost,BufWritePost *.css :call Js_css_compress() autocmd FileWritePost,BufWritePost *.less :call Js_css_compress() " GUI " taglist right side let Tlist_Use_Right_Window = 1 " hide tool bar set guioptions-=T "remove scroll bars set guioptions+=LlRrb set guioptions-=LlRrb " set the initial size of window set lines=46 columns=180 " set default font set guifont=Monospace " set guifont=Monospace\ 10 " show line number set number " set default theme colorscheme molokai-2 " encoding set encoding=utf-8 setglobal fileencoding=utf-8 bomb set fileencodings=ucs-bom,utf-8,latin1 " SCSS syntax highlight au BufRead,BufNewFile *.scss set filetype=scss " LESS syntax highlight syntax on au BufNewFile,BufRead *.less set filetype=less " Haml syntax highlight "au! BufRead,BufNewFile *.haml "setfiletype haml " Sass syntax highlight "au! BufRead,BufNewFile *.sass "setfiletype sass " set filetype indent filetype indent on " for snipMate to work filetype plugin on " show breaks set showbreak=-----> " coding format set tabstop=4 set shiftwidth=4 set linespace=1 " CONFIG " set location of ctags let Tlist_Ctags_Cmd='D:\ctags58\ctags.exe' " keep the buffer around when left set hidden " enable matchit plugin source $VIMRUNTIME/macros/matchit.vim " folding set foldmethod=marker set foldmarker={,} let g:FoldMethod = 0 map <leader>ff :call ToggleFold()<cr> fun! ToggleFold() if g:FoldMethod == 0 exe 'set foldmethod=indent' let g:FoldMethod = 1 else exe 'set foldmethod=marker' let g:FoldMethod = 0 endif endfun " save and restore folds when a file is closed and re-opened "au BufWrite ?* mkview "au BufRead ?* silent loadview " auto-open NERDTree everytime Vim is invoked au VimEnter * NERDTree /home/alex/www " set omnicomplete autocmd FileType python set omnifunc=pythoncomplete#Complete autocmd FileType javascript set omnifunc=javascriptcomplete#CompleteJS autocmd FileType html set omnifunc=htmlcomplete#CompleteTags autocmd FileType css set omnifunc=csscomplete#CompleteCSS autocmd FileType xml set omnifunc=xmlcomplete#CompleteTags autocmd FileType php set omnifunc=phpcomplete#CompletePHP autocmd FileType c set omnifunc=ccomplete#Complete " Remove trailing white-space once the file is saved au BufWritePre * silent g/\s\+$/s/// " Use CTRL-S for saving, also in Insert mode noremap <C-S> :update!<CR> vnoremap <C-S> <C-C>:update!<CR> inoremap <C-S> <C-O>:update!<CR> " DEFAULT set nocompatible source $VIMRUNTIME/vimrc_example.vim "source $VIMRUNTIME/mswin.vim "behave mswin " disable creation of swap files set noswapfile " no back ups wwhile editing set nowritebackup " disable creation of backups set nobackup " no file change pop up warning autocmd FileChangedShell * echohl WarningMsg | echo "File changed shell." | echohl None set diffexpr=MyDiff() function MyDiff() let opt = '-a --binary ' if &diffopt =~ 'icase' | let opt = opt . '-i ' | endif if &diffopt =~ 'iwhite' | let opt = opt . '-b ' | endif let arg1 = v:fname_in if arg1 =~ ' ' | let arg1 = '"' . arg1 . '"' | endif let arg2 = v:fname_new if arg2 =~ ' ' | let arg2 = '"' . arg2 . '"' | endif let arg3 = v:fname_out if arg3 =~ ' ' | let arg3 = '"' . arg3 . '"' | endif let eq = '' if $VIMRUNTIME =~ ' ' if &sh =~ '\<cmd' let cmd = '""' . $VIMRUNTIME . '\diff"' let eq = '"' else let cmd = substitute($VIMRUNTIME, ' ', '" ', '') . '\diff"' endif else let cmd = $VIMRUNTIME . '\diff' endif silent execute '!' . cmd . ' ' . opt . arg1 . ' ' . arg2 . ' > ' . arg3 . eq endfunction

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  • CSS3PIE: Internet Explorer 6 doesn't download PIE.htc

    - by Jonas
    I'm using the very impressive CSS3PIE (http://css3pie.com) library to add support for CSS3 styles in IE6-8. It works fine in versions 7 and 8 and took a lot of pain out of the process. However, in IE6 no CSS3 styles are shown at all. In fact, looking at the server logs, I can see that IE6 doesn't even download the PIE.htc file, which is necessary for the magic to work. The content type for the file is set correctly as text/x-component, it's referenced by absolute URL, and works fine in IE7 and 8. I'm using Compass (www.compass-style.org) and the PIE helper which makes the CSS look like this: #shopping_cart { behavior: url("/media/static/css/PIE.htc"); position: relative; border-radius: 10px; } I can't figure out what the problem is. Does anyone have any ideas what might cause IE6 to skip the behavior definition altogether? Cheers, Jonas

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  • Android Photosphere Viewer Application

    - by Frisbetarian
    I'm aiming to develop an android app that simply views photosphere files. It should utilize the compass to pan around the sphere when the user moves his/her phone. I'm not aiming to create photospheres via the phone's camera with it, just upload the necessary jpegs and view them. Could anyone offer any advice as to how I could go about with implementing an API that views and gives the option to manipulate photosphere files?

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  • Silverlight Cream for November 17, 2011 -- #1168

    - by Dave Campbell
    In this Issue: Colin Eberhardt, Lazar Nikolov, WindowsPhoneGeek, Jesse Liberty, Peter Kuhn, Derik Whittaker, Chris Koenig, and Jeff Blankenburg(-2-). Above the Fold: Silverlight: "Facebook Graph API and Silverlight Part 2 – Publishing data" Lazar Nikolov WP7: "Suppressing Zoom and Scroll interactions in the Windows Phone 7 WebBrowser Control" Colin Eberhardt Metro/WinRT/W8: "Tip/Trick when working with the Application Bar in WinRT/Metro (C#)" Derik Whittaker Shoutouts: Michael Palermo's latest Desert Mountain Developers is up Michael Washington's latest Visual Studio #LightSwitch Daily is up Pete Brown announced the completion of his book: It’s a wrap! I’ve completed writing Silverlight 5 in Action From SilverlightCream.com: Suppressing Zoom and Scroll interactions in the Windows Phone 7 WebBrowser Control Colin Eberhardt's latest post is all about a helper class he wrote to suppress scrolling and pinch zoom of the WP7 browser control, which you might want to do if the browser is placed inside another control. Facebook Graph API and Silverlight Part 2 – Publishing data In this part 2 of his Facebook and Silverlight series, Lazar Nikolov shows how to post data to your profile or your friends' profiles Localizing a Windows Phone app Step by Step WindowsPhoneGeek's latest post is on Localizing a WP7 app .. another great tutorial with plenty of discussion, pictures, and a project to load up and follow Background Audio Part II: Copying Audio Files To Isolated Storage Continuing his WP7 series, Jesse Liberty has Part 2 of a mini-series on Background Audio up... in this episode he's using local audio and to do so, it must be in ISO Silverlight: Bugs in the multicast client In a Q/A session, Peter Kuhn was presented a nasty bug in the multicast client that he has verified exists in not only Silverlight 4 but also Silverlight 5 Beta, including a link to his entry on Connect. Tip/Trick when working with the Application Bar in WinRT/Metro (C#) Derik Whittaker offers up some good information about the Metro Application Bar and how to keep it where you want it New! Windows Phone Starter Kit for Podcasts Chris Koenig announced the release of a new starter kit for WP7... a starter kit for podcasts. Check out the links on Chris' site and the other two starter kits that are available 31 Days of Mango | Day #4: Compass Jeff Blankenburg continues with Day 4 of his Mango series with this post on the Compass and a cool app to demonstrate it 31 Days of Mango | Day #5: Gyroscope In Day 5, Jeff Blankenburg is talking about and discussing the gyroscope, of course if you have a phone as old as mine, you won't have a gyroscope and it's not on the emulator Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Silverlight Cream for November 22, 2011 -- #1172

    - by Dave Campbell
    In this Issue: XAMLGeek, WindowsPhoneGeek, Nigel Sampson, Jesse Liberty, Sumit Dutta(-2-), Dave Bost, Jared Bienz, Joost van Schaik, and Michael Crump. Above the Fold: Silverlight: "10 Laps around Silverlight 5 (Part 7 of 10)" Michael Crump WP7: "Using MVVMLight, ItemsControl, Blend and behaviors to make a ‘heads up compass’" Joost van Schaik Metro/WinRT/W8: "“Badevand” for Windows 8" XAMLGeek Shoutouts: Michael Palermo's latest Desert Mountain Developers is up Michael Washington's latest Visual Studio #LightSwitch Daily is up From SilverlightCream.com:“Badevand” for Windows 8XAMLGeek posted a Metro app that shows water and air temperature and rain level for 5 beaches in Copenhagen, Denmark... no source, but good to see people posting appsGetting Started with Windows Phone RemindersWindowsPhoneGeek digs into Reminders in this WP7.1 post... the code you need, description, and a project to downloadHelp my app has been revoked!Nigel Sampson had a surprise when his latest app was revoked on his device, and then another... read what the solution wasA Dozen Windows Phone Videos… And CountingJesse Liberty posted his 12th WP7.1 video on Channel 9 - all about Reminders in MangoPart 23 - Windows Phone 7 - Detect Operator and Network InformationSumit Dutta has 2 more parts to his WP7 quest up... this part 23 is about getting mobile operator information and hot to get network capabilities using Microsoft.Phone.Net.DeviceNetworkInformationPart 24 - Windows Phone 7 - Microphone RepeaterIn part 24, Sumit Dutta uses the Microsoft.Xna.Framework Microphone class to record and play back voice.31 Days of Mango | Day #13: Marketplace Test KitDave Bost is at the helm of Jeff Blankenburg's Day 13 in his 31 day quest, discussing the Marketplace Test Kit and showing how to use it to determine if your app is ready for certification31 Days of Mango | Day #12; Beta DistributionJeff Blankenburg's Day 12 is written by guest author Jared Bienz, and shows how to submit an application for Beta testingUsing MVVMLight, ItemsControl, Blend and behaviors to make a ‘heads up compass’Joost van Schaik has a tutorial up showing how to make a WP7 Compass app using MVVMLight, Expression Blend, and then shows his thoughts on using the ItemsControl and Behaviors... code, descriptions and a project to download.... and I think I got your name right for the first time, Joost :)10 Laps around Silverlight 5 (Part 7 of 10)Michael Crump put out part 7 of his Silverlight 5 series at SilverlightShow... this is actually part 2 of OS Integration with Silverlight covering, among other things, 64-bit browser support and Power AwarenessStay in the 'Light!Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCreamJoin me @ SilverlightCream | Phoenix Silverlight User GroupTechnorati Tags:Silverlight    Silverlight 3    Silverlight 4    Windows PhoneMIX10

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  • Please help to clean up my RoR development environment

    - by PeterWong
    I started RoR development a few months ago, and being new to Mac... Time flies and now I have a lot different ruby versions, rails versions and gems versions located everywhere......And currently I installed rvm and things got even worst, all things messed! And so I started want to clean all things and use rvm again! I want to uninstall all gems, all rails, and all ruby versions, except the system's default one (the very old one born with the mac). Or any other better solutions or suggestions!? Please help! there is some info that I think will be useful: which -a ruby /opt/local/bin/ruby /opt/local/bin/ruby /usr/local/bin/ruby /usr/bin/ruby /usr/local/bin/ruby which -a rails /usr/local/bin/rails /usr/bin/rails /usr/local/bin/rails which -a compass # simliar for rspec and many other gems /usr/local/bin/compass /usr/local/bin/compass gem list *** LOCAL GEMS *** abstract (1.0.0) actionmailer (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4) actionpack (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4) activemodel (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2) activerecord (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4) activeresource (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4) activesupport (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4) addressable (2.2.2) arel (2.0.6, 1.0.1, 1.0.0.rc1) authlogic (2.1.6, 2.1.3) aws-s3 (0.6.2) base32 (0.1.2) block_helpers (0.3.3) bluecloth (2.0.9) bowline (0.9.4) bowline-bundler (0.0.4) bson (1.1.2) builder (2.1.2) bundler (1.0.2, 1.0.0) compass (0.10.6) crack (0.1.7) devise (1.1.3) diff-lcs (1.1.2) differ (0.1.1) dynamic_form (1.1.3) engineyard (1.3.1) engineyard-serverside-adapter (1.3.3) erubis (2.6.6) escape (0.0.4) extlib (0.9.15) facebooker (1.0.75) faker (0.3.1) faraday (0.5.3, 0.5.2) fast_gettext (0.5.10, 0.4.17) fastercsv (1.5.3) fastthread (1.0.7) ffi (0.6.3) formatize (1.0.1) formtastic (1.1.0, 1.0.1) gemcutter (0.5.0) gettext (2.1.0) git (1.2.5) gosu (0.7.25 universal-darwin) haml (3.0.24, 3.0.23, 3.0.22, 3.0.21, 3.0.18) haml-rails (0.3.4) heroku (1.10.13, 1.9.13) highline (1.5.2) hirb (0.3.4, 0.3.3) hpricot (0.8.2) i18n (0.5.0, 0.4.2, 0.4.1, 0.3.7) jeweler (1.4.0) json (1.4.6) json_pure (1.4.3) linkedin (0.1.8) locale (2.0.5) mail (2.2.12, 2.2.11, 2.2.10, 2.2.9, 2.2.7, 2.2.6.1) memcache-client (1.8.5) meta_search (0.9.8, 0.9.7.2, 0.9.7.1, 0.9.6, 0.9.4) mime-types (1.16) mongo (1.1.2) mongoid (2.0.0.beta.20) multi_json (0.0.5) multipart-post (1.0.1) mysql (2.8.1) mysql2 (0.2.6, 0.2.4, 0.2.3) net-ldap (0.1.1) nice-ffi (0.4) nokogiri (1.4.4, 1.4.2) oa-basic (0.1.6) oa-core (0.1.6) oa-enterprise (0.1.6) oa-oauth (0.1.6) oa-openid (0.1.6) oauth (0.4.4, 0.4.3, 0.4.1) oauth-plugin (0.4.0.pre1) oauth2 (0.1.0) omniauth (0.1.6) paperclip (2.3.6, 2.3.4, 2.3.1.1) passenger (2.2.12) polyglot (0.3.1) pyu-ruby-sasl (0.0.3.2) querybuilder (0.9.2, 0.5.9) rack (1.2.1, 1.1.0, 1.0.1) rack-cache (0.5.3) rack-cache-purge (0.0.2, 0.0.1) rack-mount (0.6.13) rack-openid (1.2.0) rack-test (0.5.6, 0.5.4) railroady (0.11.2) rails (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4) railties (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2) rake (0.8.7) RedCloth (3.0.4) rest-client (1.6.1) roxml (3.1.5) rscribd (1.2.0) rspec (2.3.0, 2.2.0, 2.1.0, 2.0.1) rspec-core (2.3.0, 2.2.1, 2.1.0, 2.0.1) rspec-expectations (2.3.0, 2.2.0, 2.1.0, 2.0.1) rspec-mocks (2.3.0, 2.2.0, 2.1.0, 2.0.1) rspec-rails (2.3.0, 2.2.0, 2.1.0, 2.0.1) ruby-hmac (0.4.0) ruby-mysql (2.9.3) ruby-ole (1.2.10.1) ruby-openid (2.1.8) ruby-openid-apps-discovery (1.2.0) ruby-recaptcha (1.0.2, 1.0.0) ruby-sdl-ffi (0.3) ruby-termios (0.9.6) ruby_parser (2.0.5) rubyforge (2.0.4) rubygame (2.6.4) rubygems-update (1.3.7) rubyless (0.7.0, 0.6.0, 0.3.5) rubyntlm (0.1.1) rubyzip2 (2.0.1) scribd_fu (2.0.6) searchlogic (2.4.27, 2.4.23) sequel (3.16.0, 3.15.0, 3.13.0) sexp_processor (3.0.5) shoulda (2.11.3) sinatra (1.0) slim (0.8.0) slim-rails (0.1.2) spreadsheet (0.6.4.1) sqlite3-ruby (1.3.2, 1.3.1) ssl_requirement (0.1.0) subdomain-fu (1.0.0.beta2, 0.5.4) supermodel (0.1.4) syntax (1.0.0) taps (0.3.13, 0.3.11) templater (1.0.0) temple (0.1.6) text-format (1.0.0) text-hyphen (1.0.0) thor (0.14.6, 0.14.4, 0.14.3, 0.14.1, 0.14.0) tilt (1.1) treetop (1.4.9, 1.4.8) tzinfo (0.3.23) uuidtools (2.1.1, 2.0.0) validates_timeliness (3.0.0.beta.4, 2.3.1) warden (0.10.7) will_paginate (3.0.pre2, 2.3.15, 2.3.14) xml-simple (1.0.12) ya2yaml (0.30) yajl-ruby (0.7.8, 0.7.7) yamltest (0.7.0) zena (0.16.9, 0.16.8) ====== I have ran sudo rvm implode and sudo rm -rf ~/.rvm, so no rvm now. gem env RubyGems Environment: - RUBYGEMS VERSION: 1.3.7 - RUBY VERSION: 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10.2.0] - INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/1.8 - RUBY EXECUTABLE: /usr/local/bin/ruby - EXECUTABLE DIRECTORY: /usr/local/bin - RUBYGEMS PLATFORMS: - ruby - x86-darwin-10 - GEM PATHS: - /usr/local/lib/ruby/gems/1.8 - /Users/peter/.gem/ruby/1.8 - GEM CONFIGURATION: - :update_sources => true - :verbose => true - :benchmark => false - :backtrace => false - :bulk_threshold => 1000 - :sources => ["http://rubygems.org/", "http://gems.github.com"] - REMOTE SOURCES: - http://rubygems.org/ - http://gems.github.com === ls -al /usr/local/lib/ total 5704 drwxr-xr-x 7 root wheel 238 Jun 1 2010 . drwxr-xr-x 9 root wheel 306 Dec 15 16:20 .. -rw-r--r-- 1 root wheel 1717208 Jun 1 2010 libruby-static.a -rwxr-xr-x 1 root wheel 1191880 Jun 1 2010 libruby.1.8.7.dylib lrwxrwxrwx 1 root wheel 19 Jun 1 2010 libruby.1.8.dylib -> libruby.1.8.7.dylib lrwxrwxrwx 1 root wheel 19 Jun 1 2010 libruby.dylib -> libruby.1.8.7.dylib drwxr-xr-x 6 root wheel 204 Jun 1 2010 ruby

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  • What's wrong with Bundler working with RubyGems to push a Git repo to Heroku?

    - by stanigator
    I've made sure that all the files are in the root of the repository as recommended in this discussion. However, as I follow the instructions in this section of the book, I can't get through the section without the problems. What do you think is happening with my system that's causing the error? I have no clue at the moment of what the problem means despite reading the following in the log. Thanks in advance for your help! stanley@ubuntu:~/rails_sample/first_app$ git push heroku master Warning: Permanently added the RSA host key for IP address '50.19.85.156' to the list of known hosts. Counting objects: 96, done. Compressing objects: 100% (79/79), done. Writing objects: 100% (96/96), 28.81 KiB, done. Total 96 (delta 22), reused 0 (delta 0) -----> Heroku receiving push -----> Ruby/Rails app detected -----> Installing dependencies using Bundler version 1.2.0.pre Running: bundle install --without development:test --path vendor/bundle --binstubs bin/ --deployment Fetching gem metadata from https://rubygems.org/....... Installing rake (0.9.2.2) Installing i18n (0.6.0) Installing multi_json (1.3.5) Installing activesupport (3.2.3) Installing builder (3.0.0) Installing activemodel (3.2.3) Installing erubis (2.7.0) Installing journey (1.0.3) Installing rack (1.4.1) Installing rack-cache (1.2) Installing rack-test (0.6.1) Installing hike (1.2.1) Installing tilt (1.3.3) Installing sprockets (2.1.3) Installing actionpack (3.2.3) Installing mime-types (1.18) Installing polyglot (0.3.3) Installing treetop (1.4.10) Installing mail (2.4.4) Installing actionmailer (3.2.3) Installing arel (3.0.2) Installing tzinfo (0.3.33) Installing activerecord (3.2.3) Installing activeresource (3.2.3) Installing coffee-script-source (1.3.3) Installing execjs (1.3.2) Installing coffee-script (2.2.0) Installing rack-ssl (1.3.2) Installing json (1.7.3) with native extensions Installing rdoc (3.12) Installing thor (0.14.6) Installing railties (3.2.3) Installing coffee-rails (3.2.2) Installing jquery-rails (2.0.2) Using bundler (1.2.0.pre) Installing rails (3.2.3) Installing sass (3.1.18) Installing sass-rails (3.2.5) Installing sqlite3 (1.3.6) with native extensions Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /usr/local/bin/ruby extconf.rb checking for sqlite3.h... no sqlite3.h is missing. Try 'port install sqlite3 +universal' or 'yum install sqlite-devel' and check your shared library search path (the location where your sqlite3 shared library is located). *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/usr/local/bin/ruby --with-sqlite3-dir --without-sqlite3-dir --with-sqlite3-include --without-sqlite3-include=${sqlite3-dir}/include --with-sqlite3-lib --without-sqlite3-lib=${sqlite3-dir}/lib --enable-local --disable-local Gem files will remain installed in /tmp/build_3tplrxvj7qa81/vendor/bundle/ruby/1.9.1/gems/sqlite3-1.3.6 for inspection. Results logged to /tmp/build_3tplrxvj7qa81/vendor/bundle/ruby/1.9.1/gems/sqlite3-1.3.6/ext/sqlite3/gem_make.out An error occurred while installing sqlite3 (1.3.6), and Bundler cannot continue. Make sure that `gem install sqlite3 -v '1.3.6'` succeeds before bundling. ! ! Failed to install gems via Bundler. ! ! Heroku push rejected, failed to compile Ruby/rails app To [email protected]:growing-mountain-2788.git ! [remote rejected] master -> master (pre-receive hook declined) error: failed to push some refs to '[email protected]:growing-mountain-2788.git' ------Gemfile------------------------ As requested, here's the auto-generated gemfile: source 'https://rubygems.org' gem 'rails', '3.2.3' # Bundle edge Rails instead: # gem 'rails', :git => 'git://github.com/rails/rails.git' gem 'sqlite3' gem 'json' # Gems used only for assets and not required # in production environments by default. group :assets do gem 'sass-rails', '~> 3.2.3' gem 'coffee-rails', '~> 3.2.1' # See https://github.com/sstephenson/execjs#readme for more supported runtimes # gem 'therubyracer', :platform => :ruby gem 'uglifier', '>= 1.0.3' end gem 'jquery-rails' # To use ActiveModel has_secure_password # gem 'bcrypt-ruby', '~> 3.0.0' # To use Jbuilder templates for JSON # gem 'jbuilder' # Use unicorn as the app server # gem 'unicorn' # Deploy with Capistrano # gem 'capistrano' # To use debugger # gem 'ruby-debug'

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  • The Breakpoint with Paul Irish and Addy Osmani—Episode 2

    The Breakpoint with Paul Irish and Addy Osmani—Episode 2 Ask and vote for questions at: goo.gl Addy Osmani and the (real) Paul Irish return for the second live episode of the Breakpoint - a new show focusing on developer tooling and workflow. This week they'll be showing us brand new SASS, feature inspection and console features in the Chrome Developer Tools. If you want your to stay on the bleeding edge of tooling, you won't want to miss it. From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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  • The ABC of Front End Web Development

    - by Geertjan
    And here it is, the long awaited "ABC" of front end web development, in which the items I never knew existed until I was looking to fill the gaps link off to the sites where more info can be found on them. A is for Android and AngularJS B is for Backbone.js and Bower C is for CSS and Cordova D is for Docker E is for Ember.js and Ext JS F is for Frisby.js G is for Grunt H is for HTML I is for Ionic and iPhone J is for JavaScript, Jasmine, and JSON K is for Knockout.js and Karma L is for LESS M is for Mocha N is for NetBeans and Node.js O is for "Oh no, my JS app is unmaintainable!" P is for PHP, Protractor, and PhoneGap Q is for Queen.js R is for Request.js S is for SASS, Selenium, and Sublime T is for TestFairy U is for Umbrella V is for Vaadin W is for WebStorm X is for XML Y is for Yeoman Z is for Zebra

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  • java developer who wants to raise skill level for better career growth [closed]

    - by Rahul Shivsharan
    I have an experience in Java language and in JEE related Framework for about 5 years. In these 5 years i have worked on Core java, Spring, Hibernate, JPA, Struts 1. Now just to be prepared for the near future, i am thinking to learn some new programming language or some new technology, this will help me out to be a more elligible employee. So my question to you is, which new technology or language should i learn, my target is for next 3 years. So just in case if Java fades out (thought it won't) than i can jump on to this newly learned stuff. Where should i start from ? Should i learn some other language in JVM like Scala, Clojure, Groovy, JRuby ? Or should i learn some altogether different language like Python or Erlang, Perl ? Or new technology which is related to NoSQL, like MongoDB, Hadoop, CouchDB. Or learn few current happening things in market like RoR, Node.js, LessCss or Sass, Coffee Script ? Can anybody give me some hint,

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  • Paperclip not running tasks but not showing errors

    - by Trip
    This is strange. I just did a deploy to a cluster server, and since then, pictures have not been processing. Reading the logs, I usually do not get an error at all, but they never finish. However, on one particular image, I found this little bit at least, but this might not explain everything.. Any ideas? Processing PhotosController#edit (for 69.248.152.173 at 2010-05-27 04:25:12) [GET] Parameters: {"gallery_id"="2102", "action"="edit", "type"="photo", "id"="15453", "crop"="true", "controller"="photos", "organization_id"="470", "_"="1274959512393"} Rendering media/crop_photo ActionView::TemplateError (/data/HQ_Channel/releases/20100524111501/public/system/photos/15453/original/DSC05193.JPG is not recognized by the 'identify' command.) on line #4 of app/views/media/crop_photo.js.haml: 1: == $("#media_header").html('#{ escape_javascript(render :partial = 'media/crop_photo') }').slideDown("slow"); 2: 3: :plain 4: function updateForm(coords) 5: { 6: var rx = #{PHOTO_IMAGE_WIDTH} / coords.w; 7: var ry = #{PHOTO_IMAGE_HEIGHT} / coords.h; vendor/gems/thoughtbot-paperclip-2.3.1/lib/paperclip/geometry.rb:24:in `from_file' app/models/photo.rb:68:in `photo_geometry' app/views/media/crop_photo.js.haml:4:in `_run_haml_app47views47media47crop_photo46js46haml' haml (2.2.2) [v] lib/haml/helpers/action_view_mods.rb:13:in `render' app/controllers/photos_controller.rb:81:in `crop' app/controllers/photos_controller.rb:24:in `edit' haml (2.2.2) [v] rails/./lib/sass/plugin/rails.rb:19:in `process' lib/flash_session_cookie_middleware.rb:14:in `call' vendor/gems/hoptoad_notifier-2.2.2/lib/hoptoad_notifier/rack.rb:27:in `call' ** [Hoptoad] Failure: Net::HTTPClientError ** [Hoptoad] Environment Info: [Ruby: 1.8.6] [Rails: 2.3.3] [Env: production] ** [Hoptoad] Response from Hoptoad: No project exists with the given API key. Rendering /data/HQ_Channel/releases/20100524111501/public/500.html (500 Internal Server Error) And then a little later, I got this : ActionView::TemplateError (/data/HQ_Channel/releases/20100524111501/public/system/photos/15453/original/DSC05193.JPG is not recognized by the 'identify' command.) on line #4 of app/views/media/crop_photo.js.haml: 1: == $("#media_header").html('#{ escape_javascript(render :partial = 'media/crop_photo') }').slideDown("slow"); 2: 3: :plain 4: function updateForm(coords) 5: { 6: var rx = #{PHOTO_IMAGE_WIDTH} / coords.w; 7: var ry = #{PHOTO_IMAGE_HEIGHT} / coords.h; vendor/gems/thoughtbot-paperclip-2.3.1/lib/paperclip/geometry.rb:24:in `from_file' app/models/photo.rb:68:in `photo_geometry' app/views/media/crop_photo.js.haml:4:in `_run_haml_app47views47media47crop_photo46js46haml' haml (2.2.2) [v] lib/haml/helpers/action_view_mods.rb:13:in `render' app/controllers/photos_controller.rb:81:in `crop' app/controllers/photos_controller.rb:24:in `edit' haml (2.2.2) [v] rails/./lib/sass/plugin/rails.rb:19:in `process' lib/flash_session_cookie_middleware.rb:14:in `call' vendor/gems/hoptoad_notifier-2.2.2/lib/hoptoad_notifier/rack.rb:27:in `call' ** [Hoptoad] Failure: Net::HTTPClientError ** [Hoptoad] Environment Info: [Ruby: 1.8.6] [Rails: 2.3.3] [Env: production] ** [Hoptoad] Response from Hoptoad: No project exists with the given API key. Rendering /data/HQ_Channel/releases/20100524111501/public/500.html (500 Internal Server Error)

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  • Desktop Fun: Dual Monitor Wallpaper Collection Series 1

    - by Asian Angel
    Sometimes it is hard to find good wallpapers suited to a dual monitor setup, so today we present the first in a series of wallpaper collections geared specifically towards dual monitors. Note: Click on the picture to see the full-size image—these wallpapers vary in size so you may need to crop, stretch, or place them on a colored background in order to best match them to your screen’s resolution. For more wallpapers be certain to see our great collections in the Desktop Fun section. Latest Features How-To Geek ETC The 50 Best Registry Hacks that Make Windows Better The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Our Favorite Tech: What We’re Thankful For at How-To Geek Settle into Orbit with the Voyage Theme for Chrome and Iron Awesome Safari Compass Icons Set Escape from the Exploding Planet Wallpaper Move Your Tumblr Blog to WordPress Pytask is an Easy to Use To-Do List Manager for Your Ubuntu System Snowy Christmas House Personas Theme for Firefox

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  • 20 OS X Keyboard Shortcuts You Might Not Know

    - by AlexLayne
    Mastering the keyboard will not only increase your navigation speed but it can also help with wrist fatigue. Here are some lesser known OS X shortcuts to help you become a keyboard ninja. After our article last week covering keyboard shortcuts for Windows that you might be unaware of, we had lots of requests for the best OS X shortcuts as well, so we’ve compiled a list of shortcuts you may or may not be aware of. Latest Features How-To Geek ETC The 50 Best Registry Hacks that Make Windows Better The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Our Favorite Tech: What We’re Thankful For at How-To Geek Settle into Orbit with the Voyage Theme for Chrome and Iron Awesome Safari Compass Icons Set Escape from the Exploding Planet Wallpaper Move Your Tumblr Blog to WordPress Pytask is an Easy to Use To-Do List Manager for Your Ubuntu System Snowy Christmas House Personas Theme for Firefox

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  • HTG Explains: What is the Linux fstab and How Does It Work?

    - by YatriTrivedi
    If you’re running Linux, then it’s likely that you’ve needed to change some options for your file systems.  Getting acquainted with fstab can make the whole process a lot easier, and it’s much easier than you think. What is Fstab? Latest Features How-To Geek ETC The 50 Best Registry Hacks that Make Windows Better The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Our Favorite Tech: What We’re Thankful For at How-To Geek Settle into Orbit with the Voyage Theme for Chrome and Iron Awesome Safari Compass Icons Set Escape from the Exploding Planet Wallpaper Move Your Tumblr Blog to WordPress Pytask is an Easy to Use To-Do List Manager for Your Ubuntu System Snowy Christmas House Personas Theme for Firefox

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  • Developer Training – Difficult Questions and Alternative Perspective – Part 3

    - by pinaldave
    Developer Training - Importance and Significance - Part 1 Developer Training – Employee Morals and Ethics – Part 2 Developer Training – Difficult Questions and Alternative Perspective - Part 3 Developer Training – Various Options for Developer Training – Part 4 Developer Training – A Conclusive Summary- Part 5 Congratulations!  You are now a fully trained developer!  You spent hours in a classroom, watching webinars, and reading materials.  You are now more educated and more prepared than ever before.  Now what? Stay or Quit The simple answer is that you now have two options – stay where you are or move on to a new job.  Even though you might now be smarter than you have ever felt before, this can still be a tough decision to make.  You feel extra trained and ready for a promotion or a raise, but you and your employer might not see eye to eye on this issue.  The logical conclusion is to go on a job hunt, but that might not be the most ethical thing to do. Click Image to Enlarge Manager’s Perspective Click Image to Enlarge Try to see the issue from your manager’s perspective.  You feel that you have just spent a lot of time and energy getting trained, and you should be rewarded.  But they have invested their time and energy in you.  They might see the training as a way to help you complete the goals they require from you, or as a way to help you complete tasks that will ultimately end in a reward or promotion. Moral Compass As in most cases, honesty is the best policy.  Be open with your manager about your expectations, and ask them to explain their goals.  When there is open and honest communication, everyone can walk away happy.  If you’re unable to discuss with your manager for one reason or another, just try to keep the company policy in mind and follow your own moral compass.  If all else fails, and your company is unwilling to make allowances for your new value, offer to pay the company back for the training before moving on your way. Whether you stay at your old job or move on to a new one, you are still faced with the question of what you’re going to do with all your new knowledge.  If you feel comfortable, offer to train others around you who are interested in the same subject.  This can look very good on your resume, and if you are working in a team environment it is sure to help you in the long run! What Next? You can even offer to train other trainers at the company – managers, those above you, or even report back to your original trainer about how your education is helping you in the work place.  Obviously this should be completely voluntary on the trainer’s part.  Taking advice from a “newbie” may not be their favorite idea, but it could also show the company that you are open to expanding your horizons and being helpful to everyone around you. Last in Line for Opportunity Click Image to Enlarge At this time, let us address a subject related to training and what to do with it – what if you are always overlooked for training?  This can as thorny a problem as receiving training in the first place.  The best advice is to let your supervisors know that you are always open to training and very interested in certain topics.  If you are consistently passed over, be patient.  Your turn will probably come, but the company as a whole has to focus on other problems at the moment.  If you feel that there are more personal issues at play, be sure to bring this up with your supervisor in a calm and professional manager so that everything can be worked out best for both parties. You, Yourself and Your Future! If all else fails, offer to pay for training yourself.  Perhaps money problems are at the root of being passed over.  Even if there are other reasons, offering to pay your own way shows your dedication and could work out well for you in the long run.  Always remember – in life you have to go out and make your own way, you cannot always sit and wait for things to land in your lap. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Developer Training, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Geocaching - World wide treasure hunt

    I'm not quite sure how I came across this topic but actually I find it absolutely interesting, challenging and most of all a great fun for the family and friends. The interesting part is for sure that you can follow other peoples treasures and their preferred locations where a cache might be hidden. Of course, it wont be easy to find a cache after all. Sometimes there are even 'mystery caches' which have either riddles, further instructions or little brain games for you in order to find the actual cache - that's the challenge. And last but not least, those caches are hidden outdoor. A great experience to explore nature either on your own, or your family especially with children, or as a treasure hunting pack with a couple of friends. What is geocaching? It's a high-tech outdoor treasure hunting game that's a great way to explore the world with friends, family or on your own. Participants use GPS-enabled devices to locate hidden containers called geocaches. There are over one million geocaches hidden around the world today, waiting for you to find them. Visit Geocaching.com to search for geocaches near you.(Source: Referral Email of geocaching.com) Checkout the Geocaching 101 for further details and information. They also provide a video channel on YouTube. Which equipment do I need? Any GPS-enabled device is sufficient to go onto the hunt. I'm going to start our geocaching experience equipped with my Samsung Galaxy Tab. Additionally, I installed a geocaching.com client called c:geo that hopefully assists me soon. Combined with a map app like Google Maps and a nice Compass app you should be fully equipped and ready to go. I guess, that even a car navigation system is perfect for that task. Later on, with more experience and demand for technology (or precision) it might be interesting to opt-in for a pure GPS device, like a Garmin or any other brand on the market. {loadposition content_adsense} What is a geocache and what does it contain? In its simplest form, a cache always contains a logbook or logsheet for you to log your find. Larger caches may contain a logbook and any number of items. These items turn the adventure into a true treasure hunt. You never know what the cache owner or visitors to the cache may have left for you to enjoy. Remember, if you take something, leave something of equal or greater value in return. It is recommended that items in a cache be individually packaged in a clear, zipped plastic bag to protect them from the elements. Finding your first geocache Well, first you have to have interest to pick up the challenge. Then you have to check out the Geocache directory on geocaching.com. They have recommendations for beginner's caches but you are free to choose any. Actually, we have a Mystery Cache very close to our base, and I guess that we are going for that one on our first trip. Anyway, there is a very informative guide on the website which should answer all your questions about starting your new outdoor adventure. For sure, it's going to be rewarding. Team up with friends and family Especially as a beginner there might be misunderstandings in handling the GPS coordinates, the compass, or the map, and even finding the container at the documented position isn't easy in the first place. Luckily, there are logbook reports online from other hunters, and most of the time there are even 'spoiler' images available. But also bear in mind, that a geocache might have been removed or is lost due to unconscious people or whatever other reasons. Don't be disappointed in case that you can't find anything... There be nothing anymore. A general recommendation in this case would be to replace the missing container with a new one, and give feedback to the original owner about the state of that particular location. After all, it's about fun and active participation in a world-wide community. Geocaches in Mauritius? Yes, there are currently about 45 geocaches spread all over the island, and even a single in Rodriguez - that's gonna be a tough one. Hopefully, we will get increasing numbers as Geocaching.com allows, no better, even encourages you to hide new containers at your locations of choice. I think this is going to be real fun for us during the upcoming weeks and months. Especially, when we are travelling to other countries and transfer so-called trackable items between geocaches. On my first impression, Geocaching.com seems to be very mature, open and community-oriented. There are literally hundreds of thousands geocache 'hunters' all over the world. And usually finding a container remote from your home is very rewarding. I'll keep you updated in these matters during the next months to come...

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  • Location, Orientation, and Writing a Custom Control with Mono for Android, .NET, and C#

    - by Wallym
    Like real estate, mobile is about location, location, location. That means that direction is an important item. And just as important is how this information is presented to the user. In Nov. 2011, we talked about building a user interface in Mono For Android. In this article, I'll expand a little bit on that by creating a compass that displays north. We'll use Android's built-in sensor support to determine the orientation of the device, then use a custom control to display North. The output will look like

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  • HTG Explains: Why Does Photo Paper Improve Print Quality?

    - by Eric Z Goodnight
    So you’ve shelled out the money for a fancy inkjet photo printer, only you’re not impressed with the images you’re getting out of your standard office paper. Have you ever wondered why that photo paper works so much better? Surely, paper is paper, right? What can be so special about it? In this article, we’ll explore the differences between regular typing paper, why these differences are good for printing, and how to take advantage of them for superior photographic printing Latest Features How-To Geek ETC The 50 Best Registry Hacks that Make Windows Better The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Our Favorite Tech: What We’re Thankful For at How-To Geek Settle into Orbit with the Voyage Theme for Chrome and Iron Awesome Safari Compass Icons Set Escape from the Exploding Planet Wallpaper Move Your Tumblr Blog to WordPress Pytask is an Easy to Use To-Do List Manager for Your Ubuntu System Snowy Christmas House Personas Theme for Firefox

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  • Silverlight on Windows Phone

    This was a great announcement last week at MIX10: the programming model for the upcoming Windows Phone 7 is Silverlight!   For now it is Silverlight 3, with the possibility to use phone specific features: orientation location & map control (GPS) mic push notifications motion detection accelerometer compass light proximity contacts So we have the same programming model we already know, develop in Visual Studio, test with the built-in emulator or deploy...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • iPhone OpenGL ES: How do I use gravity vector to correctly transform scene for augmented reality

    - by gpdawson
    I'm trying figure out how to get an OpenGL specified object to be displayed correctly according to the device orientation (ie. according to the gravity vector from the accelerometer, and heading from compass). The GLGravity sample project has an example which is almost like this (despite ignoring heading), but it has some glitches. For example, the teapot jumps 180deg as the device viewing angle crosses the horizon, and it also rotates spuriously if you tilt the device from portrait into landscape. This is fine for the context of this app, as it just shows off an object and it doesn't matter that it does these things. But it means that the code just doesn't work when you attempt to emulate real life viewing of an OpenGL object according to the device's orientation. What happens is that it almost works, but the heading rotation you apply from the compass gets "corrupted" by the spurious additional rotations seen in the GLGravity example project. Can anyone provide sample code that shows how to adjust correctly for the device orientation (ie. gravity vector), or to fix the GLGravity example so that it doesn't include spurious heading changes? //Clear matrix to be used to rotate from the current referential to one based on the gravity vector bzero(matrix, sizeof(matrix)); matrix[3][3] = 1.0; //Setup first matrix column as gravity vector matrix[0][0] = accel[0] / length; matrix[0][1] = accel[1] / length; matrix[0][2] = accel[2] / length; //Setup second matrix column as an arbitrary vector in the plane perpendicular to the gravity vector {Gx, Gy, Gz} defined by by the equation "Gx * x + Gy * y + Gz * z = 0" in which we arbitrarily set x=0 and y=1 matrix[1][0] = 0.0; matrix[1][1] = 1.0; matrix[1][2] = -accel[1] / accel[2]; length = sqrtf(matrix[1][0] * matrix[1][0] + matrix[1][1] * matrix[1][1] + matrix[1][2] * matrix[1][2]); matrix[1][0] /= length; matrix[1][1] /= length; matrix[1][2] /= length; //Setup third matrix column as the cross product of the first two matrix[2][0] = matrix[0][1] * matrix[1][2] - matrix[0][2] * matrix[1][1]; matrix[2][1] = matrix[1][0] * matrix[0][2] - matrix[1][2] * matrix[0][0]; matrix[2][2] = matrix[0][0] * matrix[1][1] - matrix[0][1] * matrix[1][0]; //Finally load matrix glMultMatrixf((GLfloat*)matrix);

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  • How do I use the gravity vector to correctly transform scene for augmented reality?

    - by gpdawson
    I'm trying figure out how to get an OpenGL specified object to be displayed correctly according to the device orientation (ie. according to the gravity vector from the accelerometer, and heading from compass). The GLGravity sample project has an example which is almost like this (despite ignoring heading), but it has some glitches. For example, the teapot jumps 180deg as the device viewing angle crosses the horizon, and it also rotates spuriously if you tilt the device from portrait into landscape. This is fine for the context of this app, as it just shows off an object and it doesn't matter that it does these things. But it means that the code just doesn't work when you attempt to emulate real life viewing of an OpenGL object according to the device's orientation. What happens is that it almost works, but the heading rotation you apply from the compass gets "corrupted" by the spurious additional rotations seen in the GLGravity example project. Can anyone provide sample code that shows how to adjust correctly for the device orientation (ie. gravity vector), or to fix the GLGravity example so that it doesn't include spurious heading changes? //Clear matrix to be used to rotate from the current referential to one based on the gravity vector bzero(matrix, sizeof(matrix)); matrix[3][3] = 1.0; //Setup first matrix column as gravity vector matrix[0][0] = accel[0] / length; matrix[0][1] = accel[1] / length; matrix[0][2] = accel[2] / length; //Setup second matrix column as an arbitrary vector in the plane perpendicular to the gravity vector {Gx, Gy, Gz} defined by by the equation "Gx * x + Gy * y + Gz * z = 0" in which we arbitrarily set x=0 and y=1 matrix[1][0] = 0.0; matrix[1][1] = 1.0; matrix[1][2] = -accel[1] / accel[2]; length = sqrtf(matrix[1][0] * matrix[1][0] + matrix[1][1] * matrix[1][1] + matrix[1][2] * matrix[1][2]); matrix[1][0] /= length; matrix[1][1] /= length; matrix[1][2] /= length; //Setup third matrix column as the cross product of the first two matrix[2][0] = matrix[0][1] * matrix[1][2] - matrix[0][2] * matrix[1][1]; matrix[2][1] = matrix[1][0] * matrix[0][2] - matrix[1][2] * matrix[0][0]; matrix[2][2] = matrix[0][0] * matrix[1][1] - matrix[0][1] * matrix[1][0]; //Finally load matrix glMultMatrixf((GLfloat*)matrix);

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  • What is the effect of this order_by clause?

    - by bread
    I don't understand what this order_by clause is doing and whether I need it or not: select c.customerid, c.firstname, c.lastname, i.order_date, i.item, i.price from items_ordered i, customers c where i.customerid = c.customerid group by c.customerid, i.item, i.order_date order by i.order_date desc; This produces this data: 10330 Shawn Dalton 30-Jun-1999 Pogo stick 28.00 10101 John Gray 30-Jun-1999 Raft 58.00 10410 Mary Ann Howell 30-Jan-2000 Unicycle 192.50 10101 John Gray 30-Dec-1999 Hoola Hoop 14.75 10449 Isabela Moore 29-Feb-2000 Flashlight 4.50 10410 Mary Ann Howell 28-Oct-1999 Sleeping Bag 89.22 10339 Anthony Sanchez 27-Jul-1999 Umbrella 4.50 10449 Isabela Moore 22-Dec-1999 Canoe 280.00 10298 Leroy Brown 19-Sep-1999 Lantern 29.00 10449 Isabela Moore 19-Mar-2000 Canoe paddle 40.00 10413 Donald Davids 19-Jan-2000 Lawnchair 32.00 10330 Shawn Dalton 19-Apr-2000 Shovel 16.75 10439 Conrad Giles 18-Sep-1999 Tent 88.00 10298 Leroy Brown 18-Mar-2000 Pocket Knife 22.38 10299 Elroy Keller 18-Jan-2000 Inflatable Mattress 38.00 10438 Kevin Smith 18-Jan-2000 Tent 79.99 10101 John Gray 18-Aug-1999 Rain Coat 18.30 10449 Isabela Moore 15-Dec-1999 Bicycle 380.50 10439 Conrad Giles 14-Aug-1999 Ski Poles 25.50 10449 Isabela Moore 13-Aug-1999 Unicycle 180.79 10101 John Gray 08-Mar-2000 Sleeping Bag 88.70 10299 Elroy Keller 06-Jul-1999 Parachute 1250.00 10438 Kevin Smith 02-Nov-1999 Pillow 8.50 10101 John Gray 02-Jan-2000 Lantern 16.00 10315 Lisa Jones 02-Feb-2000 Compass 8.00 10449 Isabela Moore 01-Sep-1999 Snow Shoes 45.00 10438 Kevin Smith 01-Nov-1999 Umbrella 6.75 10298 Leroy Brown 01-Jul-1999 Skateboard 33.00 10101 John Gray 01-Jul-1999 Life Vest 125.00 10330 Shawn Dalton 01-Jan-2000 Flashlight 28.00 10298 Leroy Brown 01-Dec-1999 Helmet 22.00 10298 Leroy Brown 01-Apr-2000 Ear Muffs 12.50 While if I remove the order_by clause completely, as in this query: select c.customerid, c.firstname, c.lastname, i.order_date, i.item, i.price from items_ordered i, customers c where i.customerid = c.customerid group by c.customerid, i.item, i.order_date; I get these results: 10101 John Gray 30-Dec-1999 Hoola Hoop 14.75 10101 John Gray 02-Jan-2000 Lantern 16.00 10101 John Gray 01-Jul-1999 Life Vest 125.00 10101 John Gray 30-Jun-1999 Raft 58.00 10101 John Gray 18-Aug-1999 Rain Coat 18.30 10101 John Gray 08-Mar-2000 Sleeping Bag 88.70 10298 Leroy Brown 01-Apr-2000 Ear Muffs 12.50 10298 Leroy Brown 01-Dec-1999 Helmet 22.00 10298 Leroy Brown 19-Sep-1999 Lantern 29.00 10298 Leroy Brown 18-Mar-2000 Pocket Knife 22.38 10298 Leroy Brown 01-Jul-1999 Skateboard 33.00 10299 Elroy Keller 18-Jan-2000 Inflatable Mattress 38.00 10299 Elroy Keller 06-Jul-1999 Parachute 1250.00 10315 Lisa Jones 02-Feb-2000 Compass 8.00 10330 Shawn Dalton 01-Jan-2000 Flashlight 28.00 10330 Shawn Dalton 30-Jun-1999 Pogo stick 28.00 10330 Shawn Dalton 19-Apr-2000 Shovel 16.75 10339 Anthony Sanchez 27-Jul-1999 Umbrella 4.50 10410 Mary Ann Howell 28-Oct-1999 Sleeping Bag 89.22 10410 Mary Ann Howell 30-Jan-2000 Unicycle 192.50 10413 Donald Davids 19-Jan-2000 Lawnchair 32.00 10438 Kevin Smith 02-Nov-1999 Pillow 8.50 10438 Kevin Smith 18-Jan-2000 Tent 79.99 10438 Kevin Smith 01-Nov-1999 Umbrella 6.75 10439 Conrad Giles 14-Aug-1999 Ski Poles 25.50 10439 Conrad Giles 18-Sep-1999 Tent 88.00 10449 Isabela Moore 15-Dec-1999 Bicycle 380.50 10449 Isabela Moore 22-Dec-1999 Canoe 280.00 10449 Isabela Moore 19-Mar-2000 Canoe paddle 40.00 10449 Isabela Moore 29-Feb-2000 Flashlight 4.50 10449 Isabela Moore 01-Sep-1999 Snow Shoes 45.00 10449 Isabela Moore 13-Aug-1999 Unicycle 180.79 I'm not sure what the order_by is doing here and if it's having the intended effects.

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