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  • Component-wise GLSL vector branching

    - by Gustavo Maciel
    I'm aware that it usually is a BAD idea to operate separately on GLSL vec's components separately. For example: //use instrinsic functions, they do the calculation on 4 components at a time. float dot = v1.x*v2.x + v1.y * v2.y + v1.z * v2.z; //NEVER float dot = dot(v1, v2); //YES //Multiply one by one is not good too, since the ALU can do the 4 components at a time too. vec3 mul = vec3(v1.x * v2.x, v1.y * v2.y, v1.z * v2.z); //NEVER vec3 mul = v1 * v2; I've been struggling thinking, are there equivalent operations for branching? For example: vec4 Overlay(vec4 v1, vec4 v2, vec4 opacity) { bvec4 less = lessThan(v1, vec4(0.5)); vec4 blend; for(int i = 0; i < 4; ++i) { if(less[i]) blend[i] = 2.0 * v1[i]*v2[i]; else blend[i] = 1.0 - 2.0 * (1.0 - v1[i])*(1.0 - v2[i]); } return v1 + (blend-v1)*opacity; } This is a Overlay operator that works component wise. I'm not sure if this is the best way to do it, since I'm afraid these for and if can be a bottleneck later. Tl;dr, Can I branch component wise? If yes, how can I optimize that Overlay function with it?

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  • How does a one-man developer do its games' sounds?

    - by Gustavo Maciel
    Before anything, that's not a "oh, where can I find resources?" question. Well, I've been curious about one thing in the indie games industry. For the development of the game, such tasks like game design, art, sketches, code programming and etc can be easily done by just one person. You can just take up a paper and pencil and you're a game designer. You can just take software like Photoshop or Paint and you're an artist, a scanner and you're a sketcher, a compiler and you're a programmer. For sound it's different. You may tell me: Well, follow the line, take a lot of instruments and record it. But all we know that things don't work this way. I can list up some changes for us: External noises are a big problem, sound effects can't be made with instruments, it can't sound like a recorded and clipped sound. Well I can imagine how they do this in large companies, with such big studios and etc. But to summarise, my question is: What's the best way for a one-man indie to do all its sound? Does he have to synthesize everything? Record and buy some crazy program for editing sounds?

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  • Painting with pixel shaders

    - by Gustavo Maciel
    I have an almost full understanding of how 2D Lighting works, saw this post and was tempted to try implementing this in HLSL. I planned to paint each of the layers with shaders, and then, combine them just drawing one on top of another, or just pass the 3 textures to the shader and getting a better way to combine them. Working almost as planned, but I got a little question in the matter. I'm drawing each layer this way: GraphicsDevice.SetRenderTarget(lighting); GraphicsDevice.Clear(Color.Transparent); //... Setup shader SpriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend, SamplerState.LinearClamp, DepthStencilState.None, RasterizerState.CullNone, lightingShader); SpriteBatch.Draw(texture, fullscreen, Color.White); SpriteBatch.End(); GraphicsDevice.SetRenderTarget(darkMask); GraphicsDevice.Clear(Color.Transparent); //... Setup shader SpriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend, SamplerState.LinearClamp, DepthStencilState.None, RasterizerState.CullNone, darkMaskShader); SpriteBatch.Draw(texture, fullscreen, Color.White); SpriteBatch.End(); Where lightingShader and darkMaskShader are shaders that, with parameters (view and proj matrices, light pos, color and range, etc) generate a texture meant to be that layer. It works fine, but I'm not sure if drawing a transparent quad on top of a transparent render target is the best way of doing it. Because I actually just need the position and params. Concluding: Can I paint a texture with shaders without having to clear it and then draw a transparent texture on top of it?

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  • WPF Resource Dictionary in a separate assembly

    - by Gustavo Cavalcanti
    I have resource dictionary files (MenuTemplate.xaml, ButtonTemplate.xaml, etc) that I want to use in multiple separate applications. I could add them to the applications' assemblies, but it's better if I compile these resources in one single assembly and have my applications reference it, right? After the resource assembly is built, how can I reference it in the App.xaml of my applications? Currently I use ResourceDictionary.MergedDictionaries to merge the individual dictionary files. If I have them in an assembly, how can I reference them in xaml? Thanks for your help! Gustavo

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  • Monodevelop SVN 1.7 support

    - by Gustavo Rubio
    I'm trying to checkout an SVN repo and it does get checked out, however the solution is not opened by default. I then tried to simply open an already checked out folder and I do not get versioning support. I tried this in both Windows and Linux with no success with MonoDevelop 3.0.4 and 3.0.5 My guess is that since the .sln file is in the path /trunk/code/project/project.sln and the new 1.7 format keeps only one ".svn" folder at the top of the checked out folder (e.g. /home/gustavo/ProjectSrc/ ) hence MD not "finding" the versioned code. Anybody has had success using SVN 1.7 and MonoDevelop?

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  • How to disable "N" Wireless Mode RTL8192 (Thinkpad Edge 15 Core i5) in natty

    - by Gustavo Rubio
    I've seen many owners of thinkpad edges which are supossed to be linux-friendly having problems with wireless adapter. I've found several links inside askubuntu and in ubuntuforums which have a lot of work-arounds for those problems, mine seems to be wierd though. I use my laptop on both my office and at home. At home I have a router which is A/B/G and here at home the wireless connection works just fine, using a WEP key. But in work I have a B/G/N wireless router and it doesn't work, my guess is that this adapter works with N modes but somehow this is buggy in the bundled driver in natty. I've tried to disable the "N" mode in the router but that didn't work. Later I went to realtek website, downloaded their driver and compiled myself, kinda seems to work most of the time but sometimes some websites keep trying to load or load just parts of it and images start to look like their links are broken and so on, much like what you get when you were loading a page and suddenly the connection is lost. This problem, as I said, is only using the realtek driver from their website. Dmesg gives me this a lot of these: [ 5869.049454] rtl8192se_update_ratr_table: ratr_index=0 ratr_table=0x00000ff5 [ 5879.240563] DHCP pkt src port:68, dest port:67!! So I thougth I might as well switch back to the original driver which seems to work just fine on A/B/G wireless networks but not on N networks so if anybody knows how to disable that mode from within the driver please let us know :) Thanks in advance! PS: I do found a link to a similar question and it was answered but let me remind you I'm NOT using the intel version of wireless for my thinkpad but the realtek (RTL8192SvB)

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  • Touchpad stopped working on an Acer AspireOne D255E

    - by Gustavo
    I have a less than a year old Acer AspireOne D255E with a fresh install of Ubuntu 11.10. Everything has been working fine. Great OS and great netbook. But today the touchpad stopped working. It had been working fine. I closed the netbook and when I opened it again, a couple of hours later, I could not move the pointer with the touchpad. I can not get the pointer to move. I cleaned the touchpad surface well, just in case. Everything else is working fine. All the software updates are up-to-date. I have rebooted several times with no solution. I have attached an USB mouse and the pointer works well. What can I do to troubleshoot the problem? I have gone to the System Settings, touchpad section, and there is not much that I can do there. I would like to determine first if it is a hardware or software issue and then how to resolve it. Is there a way that I can reinstall the touchpad drivers. just in case it is a software problem? I have been using Ubuntu for nearly a year now and am very happy with it. Are there any wise Ubuntu gurus out there who can help me? Thank you for reading this note.

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  • VM on Windows 7 Virtual PC cannot access host’s DVD Drive

    - by Gustavo Cavalcanti
    I have a brand new clean machine with Windows 7 Professional 64bit and I've installed the patch that adds Windows Virtual PC (Windows6.1-KB958559-x64). I then go to Windows Virtual PC, create a new Virtual Machine. As soon as go to settings and try to map the VM DVD drive to the host's DVD drive I get "File may be in use by another process or you may not have sufficient access privilege". I am an administrator in that box... What am I missing?

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  • New VM on Windows 7 Virtual PC cannot access host's DVD Drive

    - by Gustavo Cavalcanti
    I have a brand new clean machine with Windows 7 Professional 64bit and I've installed the patch that adds Windows Virtual PC (Windows6.1-KB958559-x64). I then go to Windows Virtual PC, create a new Virtual Machine. As soon as go to settings and try to map the VM DVD drive to the host's DVD drive I get "File may be in use by another process or you may not have sufficient access privilege". I am an administrator in that box... Help please!

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  • How to use dd to make splitted ISO images from an storage device?

    - by Gustavo Bandeira
    This is a double question, I just hope it's valid. I need to know how to use dd to make splitted ISO images from some storage device, I'm doing it through SSH: the process is slow and the risk of faling at the mid of the operation (1) is high then I need to know how to make these splitted ISO images from my storage device. (2) I'm searching for some reference on dd, it could be a book or a good website about it for when any doubt arises. 1 - I'm doing it on a ~60GB storage device, it took me a whole day to copy ~10GB from this disk. 2 - For curious people, I'm trying to recover an accidentaly deleted file from an iPod, until now I've been able to make the whole process, I just need to improve it beucase I left it copying the disk yesterday: Today it gave me an error when it was at ~10GB.

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  • What are the "N" versions of Windows 8?

    - by Gustavo Gondim
    Microsoft just released the final Windows 8 versions for MSDN members, before its consumer release in october. Anyway, I am a MSDN member. Today I went to see my downloads page and I found a list of the new versions to be downloaded. Windows 8 Windows 8 N Windows 8 Pro Windows 8 Pro N Windows 8 Enterprise Windows 8 Enterprise N I know the difference between the versions "Windows 8", "Windows 8 Pro" and "Windows 8 Enterprise", which you easily find at wikipedia. But, I really need to know the difference between these versions and the "N" versions before download one of them.

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  • How to enlarge a PDF document on Kindle?

    - by Gustavo
    Kindle doesn't zoom in a PDF document, so I'd like to know if there is a way to enlarge the file myself before it being displayed on the kindle screen. I've tried to convert some PDF files to the .azw kindle format, but the images weren't converted. So I have to find another way.

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  • Comparison between operational systems

    - by Gustavo Bandeira
    Some years ago, I've heard people saying that the OSX and Linux were better than Windows, I also remember of reading something that said the Solaris operating system didn't fragment their files and that the Linux file system was almost in the same step but none of these claims seemed to have basis or references. I got two questions: When comparing operating systems, what are the main points for comparison? How's the comparison between the main operating systems today?

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  • Moving WSS sites to a new SharePoint 2010 Foundation server

    - by Gustavo Cavalcanti
    This existing question helps but it doesn't answer all my questions. I have WSS 3 running on Server1 (Server 2003) and its database is DBServer1 (SQL 2008). I have installed SharePoint 2010 Foundation on Server2 (Server 2008) with databases on DBServer2 (SQL 2008 R2). SP 2010 Foundation is up and running ok and it already has one newly created Web Application. Now my goal is to copy all sites from Server1/DBServer1 to Server2/DBServer2 (and eventually retire Server1/DBServer1). Could you please help me with a step-by-step list on how to accomplish this? Thank you!

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  • ATG Live Webcast March 29: Diagnosing E-Business Suite JVM and Forms Performance Issues (Performance Series Part 4 of 4)

    - by BillSawyer
    The next webcast in our popular EBS series on performance management is going to be a showstopper.  Dave Suri, Project Lead, Applications Performance and Gustavo Jimenez, Senior Development Manager will discuss some of the steps involved in triaging and diagnosing E-Business Suite systems related to JVM and Forms components. Please join us for our next ATG Live Webcast on Mar. 29, 2012: Triage and Diagnostics for E-Business Suite JVM and Forms The topics covered in this webcast will be: Overall Menu/Sections Architecture Patches/Certified browsers/jdk versions JVM Tuning JVM Tools (jstat,eclipse mat, ibm tda) Forms Tools (strace/FRD) Java Concurrent Program options location Case studies Case Studies JVM Thread dump case for Oracle Advanced Product Catalog Forms FRD trace relating to Saving an SR Java Concurrent Program for BT Date:               Thursday, March 29, 2012Time:              8:00 AM - 9:00 AM Pacific Standard TimePresenters:  Dave Suri, Project Lead, Applications Performance                        Gustavo Jimenez, Senior Development ManagerWebcast Registration Link (Preregistration is optional but encouraged)To hear the audio feed:   Domestic Participant Dial-In Number:            877-697-8128    International Participant Dial-In Number:      706-634-9568    Additional International Dial-In Numbers Link:    Dial-In Passcode:                                              99342To see the presentation:    The Direct Access Web Conference details are:    Website URL: https://ouweb.webex.com    Meeting Number:  597073984 If you miss the webcast, or you have missed any webcast, don't worry -- we'll post links to the recording as soon as it's available from Oracle University.  You can monitor this blog for pointers to the replay. And, you can find our archive of our past webcasts and training here.If you have any questions or comments, feel free to email Bill Sawyer (Senior Manager, Applications Technology Curriculum) at BilldotSawyer-AT-Oracle-DOT-com. 

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  • Ubuntu full installation on Chromebook

    - by user193385
    Guys I am quite new here :) I just bought a Google Chromebook HP 14 and I am very happy to be honest. But I do miss my Ubuntu OS :), and the options available to use aren't a real native OS system but adaptations that sometimes do not work :( Does anyone have an idea how to install with dual boot Ubuntu alongside Chrome OS. (I hope I am not repeating any questions here) Thank so much for your time guys :) Gustavo

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  • How to create makefile for Lazarus projects?

    - by Gustavo Carreno
    After doing a light search on the Lazarus site I've come to the conclusion that this question has been asked some times but I haven't found an answer, so I'll ask my SO peers. Is there a a way to create a Makefile to replicate the action of the Lazarus IDE when it compiles a project. If so I really don't mind if it's makefile.fpc or just plain makefile, I just want some pointers on how to get to it. BTW, I've tried the option to enable the Makefile on the Lazarus options. Doesn't work.

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  • C# Assembly not found at runtime

    - by Gustavo Cardoso
    A strange error begans to happen with my XNA project on a new pc. I have two projects on the solution and a library that is used by both of them. One of the projects, a XNA Game Project, runs perfectly. The other project is a mix of WindowsForm and XNA. The form launches a XNA class when a button is clicked. When I run the program, it works great till the moment I click the button which launch the XNA class. A FileNotFoundException is fired exactly at the moment that the constructor will be executed. System.IO.FileNotFoundException was unhandled Message="Could not load file or assembly 'Microsoft.Xna.Framework, Version=3.0.0.0, Culture=neutral, PublicKeyToken=6d5c3888ef60e27d' or one of its dependencies. The system cannot find the path specified." The reference is correct, there is no problem on compilation. We already tried to delete the reference and add it again but it didn't work. Everything worked correctly in others teammate's pc. Anyone has any idea what is the problem?

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  • Mocking using boost::shared_ptr and AMOP

    - by Edison Gustavo Muenz
    Hi, I'm trying to write mocks using amop. I'm using Visual Studio 2008. I have this interface class: struct Interface { virtual void Activate() = 0; }; and this other class which receives pointers to this Interface, like this: struct UserOfInterface { void execute(Interface* iface) { iface->Activate(); } }; So I try to write some testing code like this: amop::TMockObject<Interface> mock; mock.Method(&Interface::Activate).Count(1); UserOfInterface user; user.execute((Interface*)mock); mock.Verifiy(); It works! So far so good, but what I really want is a boost::shared_ptr in the execute() method, so I write this: struct UserOfInterface { void execute(boost::shared_ptr<Interface> iface) { iface->Activate(); } }; How should the test code be now? I tried some things, like: amop::TMockObject<Interface> mock; mock.Method(&Interface::Activate).Count(1); UserOfInterface user; boost::shared_ptr<Interface> mockAsPtr((Interface*)mock); user.execute(mockAsPtr); mock.Verifiy(); It compiles, but obviously crashes, since at the end of the scope the variable 'mock' gets double destroyed (because of the stack variable 'mock' and the shared_ptr). I also tried to create the 'mock' variable on the heap: amop::TMockObject<Interface>* mock(new amop::TMockObject<Interface>); mock->Method(&Interface::Activate).Count(1); UserOfInterface user; boost::shared_ptr<Interface> mockAsPtr((Interface*)*mock); user.execute(mockAsPtr); mock->Verifiy(); But it doesn't work, somehow it enters an infinite loop, before I had a problem with boost not finding the destructor for the mocked object when the shared_ptr tried to delete the object. Has anyone used amop with boost::shared_ptr successfully?

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  • Where can I find good tutorials on XSL-FO (Formating/ed Objects), the stuff one feeds to fop and get

    - by Gustavo Carreno
    On a company that I've worked, me and my colleagues, implemented a tailored document distribution system on top of XSL-FO. My task was to get the script to deliver the documents and configure the CUPS print server and the Fax server, so I never had the time to get my hands dirty on XSL-FO. I'm thinking of implementing something in the region that was made there but I'll need some templates to work with while testing. Where can I find some good tutorials on XSL-FO, since the fop process I've mastered already?

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  • WPF - Drag from withing DataTemplate

    - by Gustavo Cavalcanti
    I have a ListBox displaying employees with a DataTemplate - it looks very similar to this screenshot. I want to be able to click on the employee photo, drag it and drop it somewhere out of the ListBox. How can I do that? I am not sure how to capture the PreviewMouseLeftButtonDown event of the Image, since it's inside the DataTemplate. Edit: The DataTemplate lives in a separate assembly and the drag/drop logic needs to be in the Window that has the ListBox. Edit2: I am thinking that the right way of doing this is using commands, am I right? Thanks!

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