Monthly Archives

Articles indexed in June 2014

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• Relationship between TDD and Software Architecture/Design

  - by Christopher Francisco

  I'm new to TDD and have been reading the theory since applying it is more complicated than it sounds when you're learning by yourself. As far as I know, the objective is to write test cases for each requirement and run the test so it fails (to prevent a false positive). Afterward, you should write the minimum amount of code that can pass the test and move to the next one. That being said, is it true that you get a fast development, but what about the code itself? this theory makes me think you are not considering things like abstraction, delegation of responsibilities, design patterns, architecture and others since you're just writing "the minimum amount of code that can pass the test". I know I'm probably wrong because if this were true, we'd have a lot of crappy developers with poor software architecture and documentation so I'm asking for a guide here, what's the relationship between TDD and Software Architecture/Design?

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• Why DbContext object shouldn't be referred in Service Layer?

  - by nazmoonnoor

  I've been looking for some implementations of Service Layer and Controller interaction in blogs and in some open source projects. All of them seem to refer DbContext object in repository classes but avoided to use in service classes. Service classes essentially using a IQueryable<T> references of DbSet<T>. I want to know why this practice is good and why DbContext shouldn't have a reference in Service Layer.

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• Inspecting the model in a Rails application

  - by Matt Sherman

  I am learning some Ruby on Rails, and am a newbie. Most of my background is in ASP.net MVC on the back end. As I play with a basic scaffold project, I wonder about this case: you jump into an established Rails project and want to get to know the model. Based on what I have seen so far (again, simple scaffold), the properties for a given class are not immediately revealed. I don't see property accessors on the model classes. I do understand that this is because of the dynamic nature of Ruby and such things are not necessary or even perhaps desirable. Convention over code, I get that. (Am familiar with dynamic concepts, mostly via JS.) But if I am somewhere off in a view, and want to quickly know whether the (eg) Person object has a MiddleName property, how would I find that out? I don't have to go into the migrations, do I?

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• Disable discrete AMD GPU

  - by Smajl

  My notebook has two graphic cards and it suffers from severe overheating after installing Ubuntu (no problem with Windows 7 on the same machine). I figured out that the problem may be in the graphic card and I would like to disable the discrete one. I followed some tutorials on this topic (for example http://planetoss.com/articles/how-to-disable-the-discrete-amd-graphics-card-in-linux/). But the problem is, that after executing the commands, nothing really happens and both GPU are still running. Here is what I have done: smajl@smajl-mini:~$ sudo chown smajl /sys/kernel/debug/vgaswitcheroo/switchsmajl@smajl-mini:~$ echo IGD > /sys/kernel/debug/vgaswitcheroo/switch smajl@smajl-mini:~$ sudo cat /sys/kernel/debug/vgaswitcheroo/switch 0:IGD:+:DynPwr:0000:01:05.0 1:DIS-Audio: :Pwr:0000:02:00.1 2:DIS: :DynPwr:0000:02:00.0 smajl@smajl-mini:~$ echo OFF > /sys/kernel/debug/vgaswitcheroo/switch smajl@smajl-mini:~$ sudo cat /sys/kernel/debug/vgaswitcheroo/switch 0:IGD:+:DynPwr:0000:01:05.0 1:DIS-Audio: :Pwr:0000:02:00.1 2:DIS: :DynPwr:0000:02:00.0 What am I missing here? Also, more on the overheating topic: 1) Installed TLP 2) updated system 3) set power setting mode to "power save" ...and nothing helps Tried same thing with Linux Mint without success. Is there anything else to try if I manage to disable the second GPU and the problem preserves? Otherwise I would have to get back to win in order not to melt my laptop.. :-/

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• Finish long directory name with tab problem

  - by user1880405

  I have simple problem that I have to long directories which I want to cd into, but I would like to know easy way. mosquito@mosquito-K56CB:~/Downloads$ ls | grep Guns Guns n' Roses - Appetite for Destruction (Japanese Edition) 1987 Guns n' Roses - Use Your Illusion I 1991 Of course I can just copy the name and put it like this: cd "Guns n' Roses - Appetite for Destruction (Japanese Edition) 1987" But why when I write cd Guns then tab, it finishes line into: cd Guns\ n\'\ Roses\ -\ then by my understanding I should just start writing App.. with tab and it should finish whole name, but it does not. And hitting tab twice does not show me anything either. What I am missing here?

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• Can not use keyboard on unity

  - by ikhsan

  Dear Ubuntu Community, currently I am using Ubuntu 14.04, and few hours ago, an update notifier prompted to install an update. After update finished, it ask for system restart, I think there is some kernel update etc. The problem start after restart, I can type password when login, but after entering unity desktop, my keyboard become suddenly unusable, system doesn't respond to any key press, after few minutes, it lock the screen automatically, but still I can't type password to unlock the screen. I tried to logout (mouse is working properly), and login again, try starting onscreen keyboard, but still have no luck, system still doesn't respond to the key press. I tried to login in console, and keyboard working well, tried to install xfce, and keyboard also working properly, keyboard also working properly when login to unity as guest, it only not working when I login using my account. I also try to reset unity config via unity-tweak-tool --reset-unity , but still no luck any suggestion to resolve this?

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• Ubuntu not mounting brand-new external drive

  - by user245115

  I bought a brand new 3TB external drive for my birthday coming up, It's a WD My Book, it came as NTFS, and I'm trying to make it mount using a simple script on boot. (Not /etc/fstab, I ruined my comp. using that by accident and had to re-install, I'm instead having a script run in /etc/init.d) The thing is, it's under /dev/sdf and I want it to mount in /exhd, the script seems to run but it doesn't mount it, any help here?

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• Built in webcam installation

  - by user291941

  I followed instructions for installing built in webcam but everytime after entering cmd and pwd a statement execute that "unable to locate package cheese"..plz help me out i need to submit my project within a week and still stuck here... This is what it is showing every time... wtc@ubuntu:~$ sudo apt-get install cheese [sudo] password for wtc: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package cheese wtc@ubuntu:~$

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• Ubuntu stuck, goes black and comes to login screen

  - by Iury Simões

  I'm using normally the ubuntu, version: ~$ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=13.10 DISTRIB_CODENAME=saucy DISTRIB_DESCRIPTION="Ubuntu 13.10" And so, for no reason, the screen goes black and come back to login screen. This not happen on login screen, like login screen infinite loop problem. I get the login and use it normally then suddenly the screen goes black. I was using Ubuntu 14 and for this problem I formatted and installed Ubuntu 13, but the problem remains.

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• Skype webcam won't work

  - by user291917

  I am a very new Ubuntu 12.04 user and would like to install Skype. It used to be available from Ubuntu Software Centre but it is no longer available from there. So I downloaded it and installed same. The Ubuntu SC Installed section does not list it But Ubuntu Tweak does. Skype works for sound only but no webcam = Logitec QuickCam Express 046d:0928. Could you please help to make it work. According what I read it should work out of the box BUT it does not. Your advise/help by email to [email protected] would be most appreciated. Kindest regards Bela Yorke

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• Scripting with variables from file

  - by Nooster

  I have several videos on my PC that I would like to shorten. For instance I have a 30 sec video where I want to have the section from sec 15 to 20 (a 5sec video). To cut this, I use avconv. avconv -i input.mp4 -ss 15 -acodec copy -vcodec copy -t 5 output.mp4 This command works pretty well. I have many videos I want to cut the same way. This is why I created a textfile containing the information: input-name, start of cut, length of cut, output-name. Those are written into in.txt that looks like this: input.mp4 15 5 output.mp4 input1.mp4 32 10 output1.mp4 input2.mp4 10 7 output2.mp4 ... My question is: How do I have to modify the avconv-command to cut my videos automatically? What I tried was this, but it didn't work at all: avconv -i $1 -ss $2 -acodec copy -vcodec copy -t $3 $4 < in.txt Any idea?

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• Problem with Software Center

  - by user215391

  I am not able use my Ubuntu Software Center and Synaptic package manager. I can't understand what's the problem. When I use the command: sudo apt-get update it shows this error: E: Malformed line 1 in source list /etc/apt/sources.list.d/canonical_partner.list (dist parse) E: The list of sources could not be read. I have seen How do I remove a malformed line from my sources.list?, but it didn't help.

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• Apache doesn't load .php files

  - by Haddex

  First, sorry for my English and asking something that it's quite answered all over the web. I've read a lot of post about this problem but I still can't find the solution. I'm a web developer who recently moved to Ubuntu from Windows 7. I had a website done (it's online and working) and I set up LAMP to keep working with it. I made a test.php file with: <?php phpinfo(); ?> and put it on /var/www/html directory, it shows all the information about the php and I was really happy: "Ok, it's all done, tomorrow I will work hard" But I placed my whole web into /var/www/html , not in a folder, the index.php is in /var/www/html but guess what: doesn't load any of my .php files, the browser just keep thinking. What I did: I rebooted Apache: /etc/init.d/apache2 restart I tried again with the test.php file and it works fine I put in /var/www/html a .html file and works fine. I looked for /etc/apache2/sites-enable/000-default.conf and it says: DocumentRoot /var/www/html I looked for /etc/apache2/mods-enabled/dir.conf and it says: DirectoryIndex index.html index.cgi index.pl index.php ... Edit* I think it's something related to phpmyadmin, like if I'm not able to connect with the database. But I got nothing on the screen when trying to load the page so...I'm not sure. I can access to the url localhost/phpmyadmin and I edited the connection.php file like this: <?php # FileName="Connection_php_mysql.htm" # Type="MYSQL" # HTTP="true" $hostname_rakstadconnection = "localhost"; $database_rakstadconnection = "rakstadclandb"; $username_rakstadconnection = "root"; $password_rakstadconnection = "admin"; $rakstadconnection = mysql_connect($hostname_rakstadconnection, $username_rakstadconnection, $password_rakstadconnection) or trigger_error(mysql_error(),E_USER_ERROR); mysql_query("SET NAMES 'utf8'"); ?> The name of the database is correct, like the user and password. http://i89.photobucket.com/albums/k220/Haddex/Capturadepantallade2014-06-09112609_zpsc45ddb72.png http://i89.photobucket.com/albums/k220/Haddex/Capturadepantallade2014-06-09112120_zps0b9e15f7.png *Edit2: could this be because it's a website that I brought to Linux from Windows? I used Dreamweaver. Edit3: I changed the # to /*/, nothing. The error.log file says: [Mon Jun 09 17:08:13.627881 2014] [:error] [pid 1517] [client 127.0.0.1:46663] PHP Warning: require_once(/var/www/html/Connections/rakstadconnection.php): failed to open stream: Permission denied in /var/www/html/index.php on line 1 [Mon Jun 09 17:08:13.627933 2014] [:error] [pid 1517] [client 127.0.0.1:46663] PHP Fatal error: require_once(): Failed opening required 'Connections/rakstadconnection.php' (include_path='.:/usr/share/php:/usr/share/pear') in /var/www/html/index.php on line 1 I'm reading error log but...should I add a linux path into a my index.php file? Don't think so. Thanks.

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• APT wedged by kernel version mismatch

  - by Leopd

  Apt is seemingly unable to do anything useful for me, repeatedly giving messages of this form: dpkg: dependency problems prevent configuration of linux-server: linux-server depends on linux-image-server (= 3.2.0.37.44); however: Version of linux-image-server on system is 3.2.0.37.45. linux-server depends on linux-headers-server (= 3.2.0.37.44); however: Version of linux-headers-server on system is 3.2.0.37.45. dpkg: error processing linux-server (--configure): dependency problems - leaving unconfigured This is basically the same problem as I cannot install any package (linux-image-server, linux-server dependencies errors) which got closed Duplicate to an answer that is totally useless for this situation. None of the advice in that very generic answer about dependencies helps. Explicitly: sudo apt-get clean sudo apt-get autoclean sudo apt-get update all have no not effect. While sudo apt-get -f install sudo dpkg --configure -a sudo apt-get -u dist-upgrade sudo apt-get -o Debug::pkgProblemResolver=yes dist-upgrade all give some form of the error message above.

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• Wireless suddenly dropping with a Ralink RT2870

  - by cwwk

  I have a Linksys WUSB600N v1 Dual-Band Wireless-N Network Adapter Ralink RT2870 USB dongle that worked flawlessly in 11.10. Since upgrading, I can't keep a connection for more than five minutes. The wild world of Google was unable to provide a solution, and I would rather not downgrade although that remains a possibility. Results of syslog: slack@slack:~$ tail /var/log/syslog Apr 26 20:26:10 slack AptDaemon: INFO: Initializing daemon Apr 26 20:26:10 slack AptDaemon.PackageKit: INFO: Initializing PackageKit compat layer Apr 26 20:26:10 slack dbus[972]: [system] Successfully activated service 'org.freedesktop.PackageKit' Apr 26 20:26:10 slack AptDaemon.PackageKit: INFO: Initializing PackageKit transaction Apr 26 20:26:10 slack AptDaemon.Worker: INFO: Simulating trans: /org/debian/apt/transaction/aaed4e38eb3c41ad86d2bab6ca03ee7c Apr 26 20:26:10 slack AptDaemon.Worker: INFO: Processing transaction /org/debian/apt/transaction/aaed4e38eb3c41ad86d2bab6ca03ee7c Apr 26 20:26:12 slack dbus[972]: [system] Activating service name='com.ubuntu.SystemService' (using servicehelper) Apr 26 20:26:12 slack dbus[972]: [system] Successfully activated service 'com.ubuntu.SystemService' Apr 26 20:30:26 slack AptDaemon.PackageKit: INFO: Get updates() Apr 26 20:30:27 slack AptDaemon.Worker: INFO: Finished transaction /org/debian/apt/transaction/aaed4e38eb3c41ad86d2bab6ca03ee7c Any suggestions?

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• How can I advetise efficiatly on my sites? [on hold]

  - by Smillification

  Are there any ad networks that give publishers/websites the ability to display adverts that are chosen by the publisher immediately on page load. Lets say the page loads, and a script inserts certain key words that the ad network uses to search their inventory of adverts and assigns the nearest one with matching tags to the publisher advert area? I know Google's adsense and many other similar services index/reads the pages content and then assign certain advert depending on the content with little or no control by the publisher... Any help is appreciated.

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• Domain in PENDINGDELETE, question about drop

  - by kcdwayne

  A domain I want is in the pendingDelete stage according to WHOIS. I have been monitoring it since redemptionPeriod, and it entered into pendingDelete 5 days ago today. After checking a few services (SnapNames, etc), they report it is scheduled to drop on the 11th (7 days, by my calculations). I'm not quite sure what to believe. The domain isn't highly valuable. It is to me and one other company. I can see no backorders placed on the big name sites, so I'm thinking of trying to get it without a backorder service. Any insight as to when it will actually drop? I've read 11AM-2PM PST, but I'm unsure. Thanks.

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• A lot of 302 redirects

  - by user3651934

  I have a website for which one month stat shows: Unique Visitors 6274 Total Visitors 7260 Pages visited 9520 Hits 88891 Whats concerns me about is the HTTP status code: 302 Moved temporarily (redirect) 36302 How come 40% hits are being redirected. If it is not normal, what could be the possible reasons? ------------------------ adding more information ------------------------ Ok, here is the code I'm using in my .htaccess file for clean URLs. Is this causing as many as 36302 redirect hits? RewriteCond %{REQUEST_FILENAME}.php -f RewriteRule ^([^\.]+)$ $1.php [L] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^(.+[^/])$ $1/ [R] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.php?page=$1 [L,QSA] RewriteRule ^(.*)/$ index.php?page=$1 [L,QSA]

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• Get exact time of each click - AdWords

  - by almo

  I have an AdWords campaign running and want to get a list with all clicks and the exact time the click occured. And I want to do this without having a tracking code on my homepage. So it needs to be via the API (AdWords/Analytics). You might think know that this is not possible. But big Bid Management tools (e.g. Kenshoo) know all details of every click and they don't have tracking code of my website (only on the success page of my contact form). How is that possible? The dimensions in AdWords only let me group the clicks at the hour level.

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• Splitting a sitemap by content type

  - by James

  I currently am tasked with submitting our website sitemap to the search engines every week. We have a module which does offer sitemap generation but we find using it does not work very well as not all pages are included and it does not split the sitemap by content. I've used various (online and offline) tools to generate the sitemaps which is not the problem. The problem is that after every generation (which takes most of each Monday) I have to manually go through the sitemap and categorise the links in to products, pages, categories and sub categories. I've experimented successfully with XSL to split the sitemap but it is still a labour intensive process. Does anyone know of a good method to split the sitemap? Currently there are around 20,000 links (iirc) in total.

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• Feedback/bug tracking system for an alpha/beta phase website? [on hold]

  - by randomguy

  I'm developing a website and it's closing onto a private alpha/beta phase. It will be exposed to a small selected group of individuals who will provide a fair amount of feedback. What options do I have for this feedback system? I would certainly like to make it collaborative (excluding email). I could mock up a really simple message board, but would rather use my time elsewhere. The feedback will mainly consist of feature suggestions and bug reports. Edit: Actually, would prefer if it's a free hosted service.

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• Implementing Circle Physics in Java

  - by Shijima

  I am working on a simple physics based game where 2 balls bounce off each other. I am following a tutorial, 2-Dimensional Elastic Collisions Without Trigonometry, for the collision reactions. I am using Vector2 from the LIBGDX library to handle vectors. I am a bit confused on how to implement step 6 in Java from the tutorial. Below is my current code, please note that the code strictly follows the tutorial and there are redundant pieces of code which I plan to refactor later. Note: refrences to this refer to ball 1, and ball refers to ball 2. /* * Step 1 * * Find the Normal, Unit Normal and Unit Tangential vectors */ Vector2 n = new Vector2(this.position[0] - ball.position[0], this.position[1] - ball.position[1]); Vector2 un = n.normalize(); Vector2 ut = new Vector2(-un.y, un.x); /* * Step 2 * * Create the initial (before collision) velocity vectors */ Vector2 v1 = this.velocity; Vector2 v2 = ball.velocity; /* * Step 3 * * Resolve the velocity vectors into normal and tangential components */ float v1n = un.dot(v1); float v1t = ut.dot(v1); float v2n = un.dot(v2); float v2t = ut.dot(v2); /* * Step 4 * * Find the new tangential Velocities after collision */ float v1tPrime = v1t; float v2tPrime = v2t; /* * Step 5 * * Find the new normal velocities */ float v1nPrime = v1n * (this.mass - ball.mass) + (2 * ball.mass * v2n) / (this.mass + ball.mass); float v2nPrime = v2n * (ball.mass - this.mass) + (2 * this.mass * v1n) / (this.mass + ball.mass); /* * Step 6 * * Convert the scalar normal and tangential velocities into vectors??? */

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• using Unity Android In a sub view and add actionbar and style

  - by aeroxr1

  I exported a simple animation from Unity3D (version 4.5) in android project. With eclipse I modified the manifest and added another activity. In this activity I put a button that it makes start the animation,and this is the result. The action bar appear in the main activity but it doesn't in the unity's activity :( How can I add the action bar and the style of the first activity to unity's animation activity ? This is the unity's activity's code : package com.rabidgremlin.tut.redcube; import android.app.NativeActivity; import android.content.res.Configuration; import android.graphics.PixelFormat; import android.os.Bundle; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.view.WindowManager; import com.unity3d.player.UnityPlayer; public class UnityPlayerNativeActivity extends NativeActivity { protected UnityPlayer mUnityPlayer; // don't change the name of this variable; referenced from native code // Setup activity layout @Override protected void onCreate (Bundle savedInstanceState) { //requestWindowFeature(Window.FEATURE_NO_TITLE); super.onCreate(savedInstanceState); getWindow().takeSurface(null); //setTheme(android.R.style.Theme_NoTitleBar_Fullscreen); getWindow().setFormat(PixelFormat.RGB_565); mUnityPlayer = new UnityPlayer(this); /*if (mUnityPlayer.getSettings ().getBoolean ("hide_status_bar", true)) getWindow ().setFlags (WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); */ setContentView(mUnityPlayer); mUnityPlayer.requestFocus(); } // Quit Unity @Override protected void onDestroy () { mUnityPlayer.quit(); super.onDestroy(); } // Pause Unity @Override protected void onPause() { super.onPause(); mUnityPlayer.pause(); } // eliminiamo questa onResume() e proviamo a modificare la onResume() // Resume Unity @Override protected void onResume() { super.onResume(); mUnityPlayer.resume(); } // inseriamo qualche modifica qui // This ensures the layout will be correct. @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); mUnityPlayer.configurationChanged(newConfig); } // Notify Unity of the focus change. @Override public void onWindowFocusChanged(boolean hasFocus) { super.onWindowFocusChanged(hasFocus); mUnityPlayer.windowFocusChanged(hasFocus); } // For some reason the multiple keyevent type is not supported by the ndk. // Force event injection by overriding dispatchKeyEvent(). @Override public boolean dispatchKeyEvent(KeyEvent event) { if (event.getAction() == KeyEvent.ACTION_MULTIPLE) return mUnityPlayer.injectEvent(event); return super.dispatchKeyEvent(event); } // Pass any events not handled by (unfocused) views straight to UnityPlayer @Override public boolean onKeyUp(int keyCode, KeyEvent event) { return mUnityPlayer.injectEvent(event); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { return mUnityPlayer.injectEvent(event); } @Override public boolean onTouchEvent(MotionEvent event) { return mUnityPlayer.injectEvent(event); } /*API12*/ public boolean onGenericMotionEvent(MotionEvent event) { return mUnityPlayer.injectEvent(event); } } And this is the AndroidManifest.xml android:versionCode="1" android:versionName="1.0" > <!-- android:theme="@android:style/Theme.NoTitleBar"--> <supports-screens android:anyDensity="true" android:largeScreens="true" android:normalScreens="true" android:smallScreens="true" android:xlargeScreens="true" /> <application android:icon="@drawable/app_icon" android:label="@string/app_name" android:theme="@android:style/Theme.Holo.Light" > <activity android:name="com.rabidgremlin.tut.redcube.UnityPlayerNativeActivity" android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale" android:label="@string/app_name" android:screenOrientation="portrait" > <!--android:launchMode="singleTask"--> <meta-data android:name="unityplayer.UnityActivity" android:value="true" /> <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="false" /> </activity> <activity android:name="com.rabidgremlin.tut.redcube.MainActivity" android:label="@string/title_activity_main" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <uses-sdk android:minSdkVersion="17" android:targetSdkVersion="19" /> <uses-feature android:glEsVersion="0x00020000" /> </manifest>

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• Moving characters on a grid [on hold]

  - by madmax1

  i am developing my first game with C++. My game uses a grid of rectangles. I have a class Board which manages the grid as a whole, initializes the terrain, places/removes characters, etc. It has a 2D vector of a class Field, which handles the Structure of the field, contained Objects, Characters, etc. Field again contains a vector of class Character, which are positioned on the field. Now i want to implement the functionality to move a character on the board, however dont know which is best practice to do so. Should i implement a moveCharacter(character, offset) function in Board, make it search for the character and move it? Or should i implement a function move(offset) in Character? This sure would be nicest, however makes characters necessary to know the board they are on, or the field which in turn knows the board. On the one hand i feel like i should avoid inclusion between classes as much as possible e.g. to increase portability of classes for different projects, on the other hand i think the character.move() functionality is most comfortable for further development. Im pretty new to "bigger" C++ projects and these kind of design questions pop up more and more often lately and i have troubles deciding. Thanks a lot for any advice!

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• How can I transform a Point2f with a matrix on Android?

  - by Vivendi

  I'm developing for Android and I'm using the android.renderscript.Matrix3f class to do some calculations. What I need to do now is to now is to do something like mat.tranform(pointIn, pointOut); So I need to transform a matrix by a given Point class. In awt I would simply do this: AffineTransform t = new AffineTransform(); Point2D.Float p = new Point2D.Float(); t.transform( p, p ); But in Android I now have this: Matrix3f t = new Matrix3f(); PointF p = new PointF(); // Now I need to tranform it somehow.. But the Matrix3f class in Android doesn't have a Matrix.transform(Point2D ptSrc, Point2D ptDst) method. So I guess I have to do the transformation manually. But I'm not really sure how that works. From what I've seen it's something like a translate and then a rotate? Could anyone please tell me how to do this in code?

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