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  • How to zoom in&zoom out

    - by stanimir
    While using 10.04 and the previous versions I used to put ctrl+F6 to zoom in and subsequently ctrl+F7 to zoom out. Now I can't even find the options to zoom in and zoom out in the "keyboard shortcuts". I tried "the Magnifier" in the Compiz but really can't understand what is going on right there. There is simple question I would like to ask: What to do so as to be able to zoom in with ctrl+F6 and zoom out with ctrl+F7? Thanks a lot.

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  • C# XNA - Sky Sphere Question

    - by Wade
    I have been banging my head against the wall trying to get a sky sphere to work appropriately in XNA 4.0. I have the sphere loading correctly, and even textured, but i would like something a little more dynamic that can support a day/night cycle. My issue is that, while i know a good amount of C# and XNA, i know next to nothing about HLSL. (I could make an ambient light shader if my life depended on it...) I also have not been able to find a tutorial on how to build a sky sphere like this. Of course i don't expect to be able to make an amazing one right off the bat, i would like to start small, with a dynamic coloring sky i'll work out the clouds and sun later. My first question: Does anyone know of any good tutorial sites that could help me get a decent grasp around HLSL? Second: Does anyone have a good example of or know where to find one of a gradient sky using XNA and C#?

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  • How to set x509 Certificate private key access rights for AppPoolIdentity

    - by ChrisD
    If your website uses the AppPoolIdentity and requires access to the private key of an x509Certficate, you’ll need to grant the read permissions to the iis application pool.   To grant permissions to the AppPoolIdentity: Run Certificates.MMC (or Start->run->mmc.exe, Add Certificate Snap-In for LocalMachine) Select the certificate (Personal node on the certificate tree) , right click and Manage Permissions. Add a new user to the permissions list. Enter "IIS AppPool\AppPoolName" on the local machine". Replace "AppPoolName" with the name of your application pool.

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  • How do early version numbers work for new products?

    - by Lord Torgamus
    I'm currently writing a small desktop application for a friend, but I'm doing it primarily as a learning experience for myself. In the spirit of getting educated and doing things The Right Way, I want to have version numbers for this app. My research brought up these related results What "version naming convention" do you use? How do you version your files (Version Numbers) Forked a project, where do my version numbers start? but none of them address numbering of alphas, betas, release candidates, &c. What are the conventions for version numbers below 1.0? I know they can go on for some time; for example, PuTTY has been around for at least a decade and is still only at version beta 0.60.

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  • C# books for the experienced programmer

    - by Michael Dmitry Azarkevich
    So I've been programming in C# for 3 years now (been programming in various languages for 3 years before that as well) and most of the stuff I learned I pieced together on the internet. The thing is, I want to understand C# more formally and in depth and so would like to get some books on the subjects. Any books you'd recommend? Also, I've heard good things about "C# 4.0 in a Nutshell", "Pro C# 2010 and the .NET 4 Platform" and "CLR via C#". What do you think of these? (The people at stackoverflow told me to take it here. Please, Please tell me I'm in the right place this time)

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  • Font rendering in Firefox is blurry

    - by Mehrdad
    A picture is worth a thousand words... so does anyone know how to fix this font blurriness in Firefox? (You'll need to right-click the picture below go to View Image to view it full-size; it's too small to see anything here.) Note: My other applications (and the Firefox non-client area, as you can see in the screen) are completely fine, so obviously going to System-Appearance and changing the font settings isn't fixing the situation. Edit: Not letting web pages to use their own fonts also doesn't help: See how the upper one is still sharper? Also, Firefox's own menu bar doesn't render the same way as the page content (menu bar below, page content above). They're both Segoe UI:

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  • Nautilus will not launch after update to 12.10

    - by dereksalerno
    I updated to Ubuntu 12.10 today from 12.04 using the graphical update tool. Everything seemed to be fine until I went to open Nautilus, and it would not open. Bizarrely, I am able to open a file that I happen to have on my desktop, but when I click on the launcher, it never opens. When I enter 'nautilus' in the terminal, I get this: (nautilus:8557): Gdk-CRITICAL **: gdk_x11_display_get_xdisplay: assertion `GDK_IS_DISPLAY (display)' failed zsh: segmentation fault (core dumped) nautilus I am not a total novice with ubuntu or linux, but all I can tell is that there is some problem with X. Can someone please point me in the right direction as far as fixing this? I really don't want to have to do a fresh install. Thank you very much.

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  • SOA Suite 11g Dynamic Payload Testing with soapUI Free Edition

    - by Greg Mally
    Overview Many web service developers use soapUI for various tests like: smoke test, unit test, and load testing because you can get a free edition that is fairly robust. However, if you need to venture into more complex testing that requires a dynamic payload, then the free edition doesn't necessarily make it easy. This feature does exist in soapUI, but for obvious reasons it is in the Pro version. In this blog I will show you how to use soapUI free edition for dynamic payloads in a simplified example. Hopefully this will open the doors for you to expand into more complex scenarios. The following assumes that you have a working knowledge of soapUI and will not go into concepts like setting up a project etc. For the basics, please review the documentation for soapUI: http://www.soapui.org/Getting-Started/. Additionally, we will be using asynchronous web services and you can review the setup for this in my blog: SOA Suite 11g Asynchronous Testing with soapUI. Features in soapUI Free Edition Relating to this Topic The soapUI test tool provides a very feature rich environment that can do many things provided you are willing to go beyond point and click. For this example, we will be leveraging just a couple features for our dynamic payload example: Test Case Properties Scripting with Groovy Basically, we will be using a property as a global variable and we will manipulate that property using a Groovy script. Setting Up Our Property Properties are available throughout soapUI and here is a snippet from the soapUI website defining the locations: Projects : for handling Project scope values, for example a subscription ID TestSuite : for handling TestSuite scoped values, can be seen as "arguments" to a TestSuite TestCases : for handling TestCase scoped values, can be seen as "arguments" to a TestCase Properties TestStep : for providing local values/state within a TestCase Local TestStep properties : several TestStep types maintain their own list of properties specific to their functionality : DataSource, DataSink, Run TestCase MockServices : for handling MockService scoped values/arguments MockResponses : for handling MockResponse scoped values Global Properties : for handling Global properties, optionally from an external source For our example, we will be defining a custom property in a TestCase called SimpleAsyncPayload. The property can be created in either the Custom Properties tab located at the bottom of the Navigator panel when the TestCase is selected in the Navigator or the Properties label in the TestCase editor: Navigator Panel TestCase Editor You will notice that I set a value of “0” for the custom property. For this simplified example, we will need to retrieve that value and manipulate it prior to making the web service request invocation. In order to accomplish this, we will need to get Groovy ;) Let's Get Groovy We will now add a new Groovy Script step to the TestCase called Manipulate Payload: TestCase Editor > Append Step > Groovy Script Once we have added the Groovy Script step to our TestCase, we can open the Groovy Script editor to add the code to: Get the current value of the property we created called SimpleAsyncPayload. Convert the value of the property to an integer. Increment the value. Store the incremented value back into the TestCase property called SimpleAsyncPayload. The script should look something like the following: Groovy Script Editor – Manipulate Payload At this point we can test the script to see if it is working by simply running the TestCase (left-click on the green triangle in the upper left-hand corner of the TestCase editor). To verify if it ran correctly, we can look at the value of the SimpleAsyncPayload property which should now be 1: TestCase Editor – Run Results All that is left to complete the TestCase is to append another step of type Test Request. The information required to append the request is a name and an operation to invoke. In this example we will use the default name and select the SimpleAsyncBPELProcessBingd -> process as the operation (any other information being requested, simply use the defaults unless you are calling an asynchronous operation then do not add any assertions). We are now in familiar ground with the Test Request editor. Depending upon the type of operation you are invoking (synchronous or asynchronous), please update the request with the necessary information (e.g., callback information for asynchronous operations). We will now tweak the Test Request payload to retrieve the value of the SimpleAsyncPayload property. The soapUI editor makes this very simple: right-click in the payload and navigate to the property (e.g., right-click > Get Data.. > TestCase: [Groovy TestCase] > Property [SimpleAsyncPayload]): Test Request Editor – Insert Property Value Your payload should now look something like the following: Test Request Editor – Inserted Property Value Just like before, we are now ready to run the TestCase. If everything goes as expected we should see a response like the following: Message Viewer – Results of TestCase Run We are now setup to be able to run a stress test where the payload will change for each request. This simple example can be expanded to include multiple payload values, complex calculations in the scripts, or whatever can be done via the soapUI scripting. Hopefully you have found this useful and happy testing to you :)

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  • Protecting PDF files and XDO.CFG

    - by Greg Kelly
    Protecting PDF files and XDO.CFG Security related properties can be overridden at runtime through PeopleCode as all other XMLP properties using the SetRuntimeProperties() method on the ReportDefn class. This is documented in PeopleBooks. Basically this method need to be called right before calling the processReport() method: . . &asPropName = CreateArrayRept("", 0); &asPropValue = CreateArrayRept("", 0); &asPropName.Push("pdf-open-password"); &asPropValue.Push("test"); &oRptDefn.SetRuntimeProperties(&asPropName, &asPropValue); &oRptDefn.ProcessReport(&sTemplateId, %Language_User, &dAsOfDate, &sOutputFormat); Of course users should not hardcode the password value in the code, instead, if password is stored encrypted in the database or somewhere else, they can use Decrypt() api

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  • DIY LEGO Settlers of Catan Board Mixes Two Geeky Hobbies in One

    - by Jason Fitzpatrick
    While Settlers of Catan (a modular board game) and LEGO (a modular building system) seems destined to fit perfectly together, the execution of a functional Catan board out of LEGO bricks is tricky. Check out this polished build to see it done right. Courtesy of LEGO enthusiast Micheal Thomas, this Settlers of Catan build overcomes the problem of fitting the numerous modular Catan board pieces together by using an underlying framework to provided a preset pocket for each tile. The framework also doubles as a perfect place to lady down the roads and settlements pieces in the game. Currently the project is listed in LEGO Cuusoo–a sort of LEGOland version of Kickstarter–so pay it a visit and log a vote in support of the project. You can also check out the Michael’s Flickr stream to see multiple photos of the build in order to get ideas for your own Settlers of Catan set. LEGO Settlers of Catan [via Mashable] How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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  • The standards that fail us and the intellectual bubble

    - by Jeff
    There has been a great deal of noise in the techie community about standards, and a sudden and unexplainable hate for Flash. This noise isn't coming from consumers... the countless soccer moms, teens and your weird uncle Bob, it's coming from the people who build (or at least claim to build) the stuff those consumers consume. If you could survey the position of consumers on the topic, they'd likely tell you that they just want stuff on the Web to work.The noise goes something like this: Web standards are the correct and right thing to use across the Intertubes, and anything not a part of those standards (Flash) is bad. Furthermore, the more recent noise is centered around the idea that HTML 5, along with Javascript, is the right thing to use. The arguments against Flash are, well, the truth is I haven't seen a good argument. I see anecdotal nonsense about high CPU usage and things I'd never think to check when I'm watching Piano Cat on YouTube, but these aren't arguments to me. Sure, I've seen it crash a browser a few times, but it's totally rare.But let's go back to standards. Yes, standards have played an important role in establishing the ubiquity of the Web. The protocols themselves, TCP/IP and HTTP, have been critical. HTML, which has served us well for a very long time, established an incredible foundation. Javascript did an OK job, and thanks to clever programmers writing great frameworks like JQuery, is becoming more and more useful. CSS is awful (there, I said it, I feel SO much better), and I'll never understand why it's so disconnected and different from anything else. It doesn't help that it's so widely misinterpreted by different browsers. Still, there's no question that standards are a good thing, and they've been good for the Web, consumers and publishers alike.HTML 4 has been with us for more than a decade. In Web years, that might as well be 80. HTML 5, contrary to popular belief, is not a standard, and likely won't be for many years to come. In fact, the Web hasn't really evolved at all in terms of its standards. The tools that generate the standard markup and script have, but at the end of the day, we're still living with standards that are more than ten years old. The "official" standards process has failed us.The Web evolved anyway, and did not wait for standards bodies to decide what to do next. It evolved in part because Macromedia, then Adobe, kept evolving Flash. In the earlier days, it mostly just did obnoxious splash pages, but then it started doing animation, and then rich apps as they added form input. Eventually it found its killer app: video. Now more than 95% of browsers have Flash installed. Consumers are better for it.But I'll do it one better... I'll go out on a limb and say that Flash is a standard. If it's that pervasive, I don't care what you tell me, it's a standard. Just because a company owns it doesn't mean that it's evil or not a standard. And hey, it pains me to say that as a developer, because I think the dev tools are the suck (more on that in a minute). But again, consumers don't care. They don't even pay for Flash. The bottom line is that if I put something Flash based on the Internet, it's likely that my audience will see it.And what about the speed of standards owned by a company? Look no further than Silverlight. Silverlight 2 (which I consider the "real" start to the story) came out about a year and a half ago. Now version 4 is out, and it has come a very long way in its capabilities. If you believe Riastats.com, more than half of browsers have it now. It didn't have to wait for standards bodies and nerds drafting documents, it's out today. At this rate, Silverlight will be on version 6 or 7 by the time HTML 5 is a ratified standard.Back to the noise, one of the things that has continually disappointed me about this profession is the number of people who get stuck in an intellectual bubble, color it with dogmatic principles, and completely ignore the actual marketplace where this stuff all has to live. We aren't machines; Binary thinking that forces us to choose between "open standards" and "proprietary lock-in" (the most loaded b.s. FUD term evar) isn't smart at all. The truth is that the <object> tag has allowed us to build incredible stuff on top of the old standards, and consumers have benefitted greatly. Consumer desire, capitalism, and yes, standards ratified by nerds who think about this stuff for years have all played a role in the broad adoption of the Interwebs.We could all do without the noise. At the end of the day, I'm going to build stuff for the Web that's good for my users, and I'm not going to base my decisions on a techie bubble religion. Imagine what the brilliant minds behind the noise could do for the Web if they joined me in that pursuit.

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  • How can a large company foster excellence in its engineers?

    - by Joshiatto
    I am tasked with improving the skills (quality & speed) of engineers in my company. Here are some ideas: Pair Programming TDD Automated Check-in Policies Talks given by experts Awards for coding excellence Encourage competition among engineers to contribute to GitHub Publish standards and practices docs on the intranet site "Gamification" of engineering. Somehow make becoming badasses into a game they will enjoy playing Training Showcase github checkins on screens around the office Add an "engineer of the month" to the intranet home page How can I drive traffic to the intranet home page? What crazy futuristic idea would drive engineers to go to the page every day to see who of their peers are making more money than them (inferred via recognition) and then go off and improve their skills and productivity to see their standings improve on the home page??? Or any ideas just to foster collaboration and love for their jobs so they start taking more pride in their work?? Don't take my ideas as symptomatic of our org. I take full responsibility for not knowing the right way to do this.

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  • Installing Ubuntu 12.04 on the Hp Mini 210-2090nr

    - by Dalton Bailey
    When i got this netbook last year i planned n putting ubuntu netbook remix on it but i never did and now i can no longer booot n to windows for some reason so i finally decided to do it but after makig a usb stick with ubuntu on it it will not get to the menu where there is the black and white ubuntu logo and the option to install try and so on. I know to usb is configured correctly it will boot on other computers but on the netbook it only flashes SYSLINUX 4.06EOD..... and then flashs blue before turning black with the whit undercore in the top right corner for a very long time. any suggestions ive been told to disable acpi but i cant find it in the bios. (btw im uing 12.04 though ive tried 11.04 and used unetbootin linux live installer and universal usb installer to make the usb)

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  • How to tell thunar to stop using my device?

    - by Guillaume Coté
    When I do sudo umount /media/KINGSTON I got umount: /media/KINGSTON: device is busy. By using fuser -c /media/KINGSTON And cat /proc/<pid>/cmdline I found that the process is thunar--deamon. I closed all file manager windows. When I try to umount it by right cliking on the desktop, it also gave an error : An application is preventing the volume "KINGSTON" from being unmounted I am affraid that killing Thunar is going to impact other process running in other terminal. How can I tell it that I don't need this usb key anymore so it stop using it?

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  • Remmina 1.0 problems

    - by kamil
    I downloaded, compiled remmina and freerdp from the source repositories. Unlikely I am having troubles in RDP connections. When I initiate any RDP connection from Remmina, Remmina is closed immidialtely. I tried to open freerdp from terminal, it worked like a charm. I tried to open remmina from terminal to check errors. It says: segmentation fault - after connecting to any rdp connection I got the source from git: git clone git://github.com/FreeRDP/Remmina.git git clone git://github.com/FreeRDP/FreeRDP.git// Compilation is successfull with all dependencies. I tried to remove old remmina 0.9.9.1 with no chance I tried to reboot my machine and issue ldconfig with no chance I switched to other rdp clients right now. How can I be able to fix this? the old remmina was working well with RDP but causing sometimes high memory consumption (about 1GB of RAM) I am using Ubuntu 12.04.1 64bit

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  • Awesome Integration Of Office In Windows Phone 7[Videos]

    - by Gopinath
    Who else understand Office applications better than Microsoft? Well, not many out there. With the next generation of their mobile OS, Windows Phone 7,  Microsoft seems to be well determined to impress all of us with the awesome integration of Office. Microsoft recently published two demo videos of Office Integration in Windows Phone 7 OS. These videos shows off one of the nice things that we dream to do in a mobile: open a PowerPoint file inline from the email client, edit it, and send it back to the original sender. Other video demonstrates One Note, Word & Outlook with a clean and very intuitive user interface.  Check these two videos   Emails, Events and Schedule Office Hub Join us on Facebook to read all our stories right inside your Facebook news feed.

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  • Desktop shortcut to create a new desktop shortcut doesn't do anything

    - by David M. Karr
    It's weird that creating desktop shortcuts is currently so primitive. I found the following: Create Shortcut / launcher on Desktop in Ubuntu 12.04 That helps. However, if there's something wrong with the shortcut, it just doesn't do anything. For instance, I tried to create a shortcut for this command line to create a shortcut. When I double-click it, it just does nothing. This is the resulting text of my "Create Desktop Shortcut.desktop" file on the desktop: [Desktop Entry] Version=1.0 Type=Application Terminal=false Icon[en_CA]=gnome-panel-launcher Exec=/usr/bin/gnome-desktop-item-edit ~/Desktop/ --create-new Name[en_CA]=Create Desktop Shortcut Name=Create Desktop Shortcut Icon=gnome-panel-launcher As I said, when I double-click this, or right-click it and select Open, nothing happens. Is there a log file where something about this would be written to?

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  • How to change/create password keyring

    - by sadmicrowave
    when I try to remote desktop to the server from another ubuntu machine using the remote desktop viewer, it asks me to enter the password, which I do, then the viewer pane just goes black. When I come back and look at my server it is saying that the password keyring no longer matches the password used to login to the machine please reenter the password...and when I type in the password it doesnt take it, it just keeps popping back up saying the same message over and over. I found a thread explaining to go to System--Preferences--Passwords & Encryptions and right click on the keyring and click Set as Default. I did that and the problem persists...I tried changing the password but it told me that my original password was incorrect (even though it is the password I use to login and provide root authentication when asked) so I deleted the keyring in hopes of adding a new one but there is no place in gui to add a new one...so can I add a new one through command line? if so - how?

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  • How to make custom shaped holes in terrain

    - by Guy Ben-Moshe
    So I'm trying to create a game where you fit certain shaped objects into the hole that fits them (similar to the young children's game with different shaped blocks) in Unity 3D. I've encountered a problem, how do I make the holes in the terrain? Or what type of object should I use for making holes in? So far I've tried to make a 3d model in unity by using other cubes and planes, it just doesn't feel right. I guess I need to create a model in another software and import to unity, I don't know any other software I can use. Tips would help.

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  • ubuntu 12.04.3 - Reverse DNS issue - slow ping interval but normal ping value

    - by McArthor Lee
    i'm running ubuntu 12.04.3 x86 desktop in my corporation environment. I join the corp domain by Likewise open. But when I ping another pc, say hostname is pc-test, "ping pc-test" or "ping pc-test.domain.name" returns slow interval (about 5 seconds) but the ping value is below 1 ms. When I use "ping -n pc-test", everything works well. So I conclude this is about reverse DNS issue. how to fix this issue? many thanks! Edit: In my understanding, reverse DNS issue is related to DNS server or Wins server, not only an ubuntu issue, is this right? if I wanna fix this issue as much as possible on ubuntu but not on network servers, what to do?

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  • Collision Detection Game Design and Architecture

    - by Chompas
    I've reading some articles about collision detection. My question here is about ideas on the design for it. Baically I have a C++ game that has a main loop with entities with an update method. Based on keyboard input, these characters updates their positions. My question is not about how to detect collisions, it's about getting ideas in which is the best way to implement this. The game has a main character but also enemies that have to collide between them, so I'm not sure where to make all the iterations for checking collisions and if the right way is to check everything against everything. Thanks in advance.

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  • Website Access...DNS, ISP, issue?

    - by sublet
    This isn't so much a code issue as it might be an issue with my ISP. For some reason when I visit a site very often, like one I manage or write stories on, it will just stop pulling data down after a while. It's very random when it happens, but probably happens once a week. If effects everyone who is accessing the site from this connection, and I can access other sites no problem. Also, if I go outside the office back home, which is right down the street, and access the site it is fine. I'm using Comcast in both locations. It's almost as if I have a limit on requests to each site and have hit my limit so it blocks the site for a while. Anybody have any clue what this might be?

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  • Authorizing a module in a framework

    - by Devon
    I've been studying PHP frameworks and I've been looking for how you would go about properly authorizing a module for classes, methods, and database actions. For example, lets say I want a framework that includes different modules from different programmers: Some core class may require special access, not all modules should have access to every core class unless authorized to. I do not want one module to be able to call another module's class/method if it is not supposed to be able to. I also don't want a security flaw in one module to be able to affect another module's database tables. I suppose an easy way to go about this is have a database table for authorization to consult, but I doubt that is the best way to go about this. I'd appreciate any advice or pointing me in the right direction for some reading.

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  • Can't specify window's class in CCSM's Place Windows

    - by Anto
    Following this method, I wanted to "place" some of my windows on specific viewports. For instance, I want Xchat to always start on my top right viewport (x=2, y=1). But after I have set everything up and clicked the "Close" button to validate it (I don't have any other action button, like "OK" or "Apply"), the only thing that get saved up are the viewport X and Y coordinates. The window class (in my case class=Xchat) remains empty. This bug only occurs in the "Windows with fixed viewport" section; it works well in the "Windows with fixed placement mode", for instance. How can I solve or circumvent this issue ?

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  • Weird y offset when using custom frag shader (Cocos2d-x)

    - by Mister Guacamole
    I'm trying to mask a sprite so I wrote a simple fragment shader that renders only the pixels that are not hidden under another texture (the mask). The problem is that it seems my texture has its y-coordinate offset after passing through the shader. This is the init method of the sprite (GroundZone) I want to mask: bool GroundZone::initWithSize(Size size) { // [...] // Setup the mask of the sprite m_mask = RenderTexture::create(textureWidth, textureHeight); m_mask->retain(); m_mask->setKeepMatrix(true); Texture2D *maskTexture = m_mask->getSprite()->getTexture(); maskTexture->setAliasTexParameters(); // Disable linear interpolation on the mask // Load the custom frag shader with a default vert shader as the sprite’s program FileUtils *fileUtils = FileUtils::getInstance(); string vertexSource = ccPositionTextureA8Color_vert; string fragmentSource = fileUtils->getStringFromFile( fileUtils->fullPathForFilename("CustomShader_AlphaMask_frag.fsh")); GLProgram *shader = new GLProgram; shader->initWithByteArrays(vertexSource.c_str(), fragmentSource.c_str()); shader->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_POSITION, GLProgram::VERTEX_ATTRIB_POSITION); shader->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_TEX_COORD, GLProgram::VERTEX_ATTRIB_TEX_COORDS); shader->link(); CHECK_GL_ERROR_DEBUG(); shader->updateUniforms(); CHECK_GL_ERROR_DEBUG(); int maskTexUniformLoc = shader->getUniformLocationForName("u_alphaMaskTexture"); shader->setUniformLocationWith1i(maskTexUniformLoc, 1); this->setShaderProgram(shader); shader->release(); // [...] } These are the custom drawing methods for actually drawing the mask over the sprite: You need to know that m_mask is modified externally by another class, the onDraw() method only render it. void GroundZone::draw(Renderer *renderer, const kmMat4 &transform, bool transformUpdated) { m_renderCommand.init(_globalZOrder); m_renderCommand.func = CC_CALLBACK_0(GroundZone::onDraw, this, transform, transformUpdated); renderer->addCommand(&m_renderCommand); Sprite::draw(renderer, transform, transformUpdated); } void GroundZone::onDraw(const kmMat4 &transform, bool transformUpdated) { GLProgram *shader = this->getShaderProgram(); shader->use(); glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_2D, m_mask->getSprite()->getTexture()->getName()); glActiveTexture(GL_TEXTURE0); } Below is the method (located in another class, GroundLayer) that modify the mask by drawing a line from point start to point end. Both points are in Cocos2d coordinates (Point (0,0) is down-left). void GroundLayer::drawTunnel(Point start, Point end) { // To dig a line, we need first to get the texture of the zone we will be digging into. Then we get the // relative position of the start and end point in the zone's node space. Finally we use the custom shader to // draw a mask over the existing texture. for (auto it = _children.begin(); it != _children.end(); it++) { GroundZone *zone = static_cast<GroundZone *>(*it); Point nodeStart = zone->convertToNodeSpace(start); Point nodeEnd = zone->convertToNodeSpace(end); // Now that we have our two points converted to node space, it's easy to draw a mask that contains a line // going from the start point to the end point and that is then applied over the current texture. Size groundZoneSize = zone->getContentSize(); RenderTexture *rt = zone->getMask(); rt->begin(); { // Draw a line going from start and going to end in the texture, the line will act as a mask over the // existing texture DrawNode *line = DrawNode::create(); line->retain(); line->drawSegment(nodeStart, nodeEnd, 20, Color4F::RED); line->visit(); } rt->end(); } } Finally, here's the custom shader I wrote. #ifdef GL_ES precision mediump float; #endif varying vec2 v_texCoord; uniform sampler2D u_texture; uniform sampler2D u_alphaMaskTexture; void main() { float maskAlpha = texture2D(u_alphaMaskTexture, v_texCoord).a; float texAlpha = texture2D(u_texture, v_texCoord).a; float blendAlpha = (1.0 - maskAlpha) * texAlpha; // Show only where mask is invisible vec3 texColor = texture2D(u_texture, v_texCoord).rgb; gl_FragColor = vec4(texColor, blendAlpha); return; } I got a problem with the y coordinates. Indeed, it seems that once it has passed through my custom shader, the sprite's texture is not at the right place: Without custom shader (the sprite is the brown thing): With custom shader: What's going on here? Thanks :) EDIT It looks like after passing through the shader when I set the position of the sprite I set it in points, with (0,0) being in the top-right. Indeed, when I do sprite->setPosition(320, 480), the sprite is perfectly placed at the top of the screen.

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