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• How much more complex is it to draw simple curves, lines and circles in OpenGL ES rather than in Qua

  - by mystify

  Is OpenGL ES really so much faster? Why? And is it really so horrible complicated to draw such simple things in OpenGL ES compared to drawing these in Quartz 2D? For example, I have a UIView subclass with -drawRect: implemented, where I draw some lines, curves and circles. Just simple paths, with some shadow. What would I do in OpenGL ES? Isn't there this nice EAGLView layer thing? One thing that comes to mind is how do touch events go into OpenGL ES? Maybe that's the complex thing about it? Are there tutorials on basic drawing operations in OpenGL ES?

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• How to mask DLL in .NET ?

  - by ytrewq

  Let's say I have a DLL that provides math calculus functions. To use it, I include the using Colhq.Math.Basic; namespace. How could I use it by adding a statement like using Blala.Functions.Math; ? So how could I use everything (methods, enums, etc.) from a DLL by using a different namespace ? Is there a one-shot way to wrap or mask a DLL ?

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• assigning variables to DOM event listeners when iterating

  - by ptrn

  I'm thinking there's something basic stuff I'm missing here; for (var i=1; i<=5; i++) { var o = $('#asd'+i); o.mouseover(function() { console.info(i); }); } When hovering over the five different elements, I always get out the last value from iteration; the value 5. What I want is different values depending of which element I'm hovering, all from 1 to 5. What am I doing wrong here?

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• Retail knowledge inference

  - by blueomega

  So i am doing a research on how can i infer knowledge from reports (not with a specific format), but after pre processing, i should have some kind of formatted data. A fairly basic inference would be: "Retailer has X stock." and "X is sellable." - "Retailer sells X" the knowledge i focus is retail domain oriented, and if possible i should improve its efficiency with each iteration. Is this scifi(some of my friends think it is)? The related stuff i find online are "expert systems" that find anomalies, fuzzy inference systems and some rants about "easy knowledge". Can you help me with some points for me to focus or orient me in some research directions? blueomega

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• Significant new inventions in computing since 1980

  - by Alan Kay

  This question arose from comments about different kinds of progress in computing over the last 50 years or so. I was asked by some of the other participants to raise it as a question to the whole forum. Basic idea here is not to bash the current state of things but to try to understand something about the progress of coming up with fundamental new ideas and principles. I claim that we need really new ideas in most areas of computing, and I would like to know of any important and powerful ones that have been done recently. If we can't really find them, then we should ask "Why?" and "What should we be doing?"

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• Include Problem with Objective-C++ and OpenGL

  - by Stephen Furlani

  Hello, I feel silly asking this but I've searched for 'include problems' and have only come up with basic stuff. I'm working with an API that includes/imports in their header files (ARGH! HATE ANGER DESTRUCTION). One of these Obj-C files #import "OpenGL/CGLMacros.h" which #define's things like glMatrixMode(...); In my code I need the glMatrixMode(...); from #include "OpenGL/gl.h" but it won't access it! I can't edit the headers from the (poorly) coded API to put the includes in their definition files. What can I do? If the CGLMacros.h file starts out like /* Copyright: (c) 1999 by Apple Computer, Inc., all rights reserved. */ #ifndef _CGLMACRO_H #define _CGLMACRO_H Can I put a #define _CGLMACRO_H before I include the offending API header file? -Stephen

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• In Django : How to serialize dict object to json ?

  - by Rohit

  I have this very basic problem, >>> serializers.serialize("json", {'a':1}) Traceback (most recent call last): File "<console>", line 1, in <module> File "/usr/lib/pymodules/python2.6/django/core/serializers/__init__.py", line 87, in serialize s.serialize(queryset, **options) File "/usr/lib/pymodules/python2.6/django/core/serializers/base.py", line 40, in serialize for field in obj._meta.local_fields: AttributeError: 'str' object has no attribute '_meta' >>> How can this be done ? Thanks in advance !

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• Run WF 4.0 as a server-side component

  - by user184216

  Hi all, For a new project, we need to use WF 4.0 for deploying and running workflows. Instead of hosting workflows within the application itself, we decided to implement a server-side component that is in charge of running workflows. Before WF 4.0, one had explicit access to the the runtime engine (WorkflowRuntime), which provided some basic management functionalities, such as retrieving the workflows currently running etc ... As far as I could find out, WF 4.0 lacks this explicit access, as workflows are created via the WorkflowInstance class and no reference is immediately available to the WorkflowRuntime ... If I need these management functionalities on the server side, I'm a correct that I will need to implement these myself? Or did I miss out on something ... Thanks in advance for your answers!

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• Microsoft Robotics Studio in Ubuntu, with Wine ?

  - by Arkapravo

  I am using Ubuntu 9.10 and I am a bit of a robotics enthusiast. I have used KiKS (in MATLAB for simulating Khepera robots), MobotSim (in Windows, simulates a point like robot using a BASIC editor) and Player/Stage (with C/C++ on Ubuntu 9.04). My question, can MS Robotics Studio be installed in Ubuntu Linux using Wine (I am using 1.1.31) ? Has anyone done it ? Any other way to install MS Robotics Studio in Unix (Any flavour) ? Thanks for your reply !

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• Fade effect onclick (jQuery)

  - by Nimbuz

  I have this very basic tabbed block: $('.tabbed-section .panel').hide(); $('.tabbed-section .panel:first').show(); $('.tabbed-section .tabs li:first').addClass('active'); $('.tabbed-section .tabs li a').click(function () { $('.tabbed-section .tabs li').removeClass('active'); $(this).parent().addClass('active'); var currentTab = $(this).attr('href'); var tab_id = $(this).attr('href'); $(this).closest('#hero').attr('class', 'clear ' + tab_id.replace('#', '')); $('.tabbed-section .panel').hide(); $(currentTab).show(); return false; }); .. it works great, but can I add fade effect when the active tab changes? I think there's a plugin (innerfade) for it but I want to avoid using another plugin if possible. Also, can the jQuery above be compacted further? Thanks for your help!

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• Testing ASP.NET security in Firefox

  - by blahblah

  I'm not sure whether this question belongs on StackOverflow or SuperUser, but here goes nothing... I'm trying to test out some basic security problems on my personal ASP.NET website to see exactly how the custom validators, etc. work when tampering with the data. I've been looking at the Firefox extension TamperData which seems to do the trick, but it doesn't feel very professional at all. The issues I'm having with TamperData is that the textbox for the POST data is way too small to hold the ASP.NET view-state, so I have to copy that data into Emacs and then back again to be productive at all. I also don't like that there doesn't seem to be an option to only tamper with data which is from/to localhost. Any ideas on better extensions for the task or better methods to test it?

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• Counting consecutive items within MS SQL

  - by Greg

  Got a problem with a query I'm trying to write. I have a table that lists people that have been sent an email. There is a bit column named Active which is set to true if they have responded. But I need to count the number of consecutive emails the person has been inactive since either their first email or last active email. For example, this basic table shows one person has been sent 9 emails. They have been active within two of the emails (3 & 5). So their inactive count would be 4 as we are counting from email number 6 onwards. PersonID(int) EmailID(int) Active(bit) 1 1 0 1 2 0 1 3 1 1 4 0 1 5 1 1 6 0 1 7 0 1 8 0 1 9 0 Any pointers or help would be great. Regards Greg

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• Mass-mailing without getting your domain banned

  - by Arpit

  I plan on sending an email to 10k+ email addresses (mostly gmail and yahoo) to announce the launch of my startup's product. I'm planning on using PHPMailer or PHPList to send out the mails. I've never mass-mailed before and had a few basic questions. I've already browsed through some of the other mass-mail threads on this forum but the questions remain hence a new thread. Are newsletters which are sent by so many other organizations sent out in a similar manner - using programs such as PHPMailer or PHPList? When would a GMail or a Yahoo blacklist my domain name - are there any set parameters - 1000 emails in an hour would result in getting banned or some such parameters? If yes, then what sort of settings should I take note of when sending the emails - any format of the email or spread out the 10+ emails over 2 days etc.? If a Gmail or a Yahoo blacklists your domain name - is there any way to get out of the blacklist?

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• Create a SOCKS Proxy that does nothing special

  - by rwired

  I am trying to create a SOCKS proxy in C++ that runs as a background process on localhost. If the user's browser is configured to use the proxy, I want all HTTP requests to be passed along through the normal TCP/IP stack. i.e. The browser will behave exactly as it normally would. Eventually I will add another layer which will check to see if the requested resource matches certain criteria, and if so will handle the request differently. But for now I'm just trying to solve the basic problem... how to create a SOCKS proxy that doesn't change anything?

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• input file cannot be found

  - by Eric Smith

  I am just messing around with reading input files with java until I got stumped at the most basic of steps... finding the input file! The input.txt file is in the same directory as my class file that is calling it yet eclipse still gives me an error that it cant be found: "Exception in thread "main" java.lang.Error: Unresolved compilation problem: Unhandled exception type FileNotFoundException" My code: package pa; import java.util.Scanner; public class Project { public static void main(String[] args) { java.io.File file = new java.io.File("input.txt"); System.out.println(file.getAbsolutePath()); Scanner input = new Scanner(file); } } input.txt is in the same package, same folder and everything. I'm confused :(

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• ASP.NET MVC Ajax OnBegin/Complete Javascript Problem

  - by mrkcsc

  Hello, I am trying to fire off a javascript method using the OnBegin AjaxOption in an Ajax method. However, when debugging with firebug the callback in unable to find the Javascript method and I do not know why. My code is simple, first I use a basic Ajax method like this: <%= Ajax.ActionLink("Testing", "Testing", new AjaxOptions { OnBegin = "RunThisThing" }) % Then under it I decalre this script. <script type="text/javascript"> function RunThisThing { alert("WORK") } </script> Yet when I try running the page and clicking on the link, Firebug tells me "RunThisThing is not defined". Any idea what I might be doing wrong?

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• Cinema4D XML scene not rendering texture

  - by George Profenza

  I was playing with the Cinema 4D command line options and ran into a problem that might not be specific to the command line options. I saved a basic scene(a textured cube) in two formats: the original .c4d(binary) format and .xml(Cinema 4D XML via File Export). the .c4d file renders with the texture applied, while the .xml file renders without the texture applied. I had a look at the xml file, and there is a node that holds a reference to the image used as texture, and there is another node which seems to store the pixels in xml. When I opened the .xml document in Cinema 4D, the document did store the material with the texture, but it was not applied to the object. Am I missing something when I export to XML ? How can I export a Cinema 4D XML that can render with the texture applied ?

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• Programming language for web

  - by cable729

  I haven't programmed in a while, and have kind of lost interest, but I want to get back, and I've enjoyed C# the most, a lot more than objective-c and visual basic. So I want to make some games that me and my friends will be able to play next school year. So basically something you can play on the web. What programming languages deploy to the web? If c# is possible, and a mac with safari/firefox would be able to use it (I can't install plugins, and I don't want to get in trouble for making myself admin again) Flash, Java, etc. If java does, I'd like that most since it's most like c#. Then what libraries/engines would I use? I want to do 2d. And then what IDE would I use? Thanks in advance!

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• reference symbols on the main timeline

  - by vasion

  this is one of those upsurdly basic questions for which google does not work. I have usually dispatched events from my classes and dealt with the user interface in the document class. But now i want to separate all the UI in a separate class, accessible by other classes. I have added it as a child to the main/document class, but how do i reference the main class without going through parent.parent shananigans? edit. one more thing i remembered. Some of my UI elements are not programatically added.

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• JQuery UI datepicker in Asp.Net MVC

  - by Frederik

  I have tried to use some of the widgets in JQuery UI on an Asp.Net MVC site without luck. For example the basic datepicker from jQuery UI - functional demos. I have created a simple MVC project and added the script references in Site.Master like this: <script src="../../Scripts/jquery-1.2.6.min.js" type="text/javascript"></script> <script src="../../Scripts/jquery-ui-personalized-1.5.3.min.js" type="text/javascript"></script> <link href="../../Content/Site.css" rel="stylesheet" type="text/css" /> <link href="../../Content/ui.datepicker.css" rel="stylesheet" type="text/css" />" In the Index.aspx file I have cleared all default content and added the following: <script type="text/javascript"> $("#basics").datepicker(); </script> <input type="text" size="10" value="click here" id="basics"/> The core jQuery works fine. Any clues?

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• Looking for actively maintained matrix math library for php

  - by Mnebuerquo

  Does anyone know where I might find a PHP matrix math library which is still actively maintained? I need to be able to do the basic matrix operations like reduce, transpose (including non-square matrices), invert, determinant, etc. This question was asked in the past, then closed with no answers. Now I need an answer to the same question. See these links to related questions: http://stackoverflow.com/questions/428473/matrix-artihmetic-in-php http://stackoverflow.com/questions/435074/matrix-arithmetic-in-php-again I was in the process of installing the pear Math_Matrix library when I saw these and realized it wouldn't help me. (Thanks Ben for putting that comment about transpose in your question.) I can code this stuff myself, but I would make me happier to see that there is a library for this somewhere.

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• Set window to stays always on desktop on windows7

  - by Nuno

  Hi, I'm trying to set my window a child of the desktop, and i'm doing this like this: HWND ProgmanHwnd = ::FindWindowEx( ::FindWindowEx( ::FindWindow(L"Progman", L"Program Manager"), NULL, L"SHELLDLL_DefView", L""), NULL, L"SysListView32", L"FolderView"); SetParent(m_hWnd, ProgmanHwnd); This works fine in windowsXP, my window is underneath all windows and when i press the "show desktop" option the window shows and all other "normal" windows are hide. But in Win7 when i do the above code the same window is not displayed, in spy++ i can see that my window is a child window of the SysListView32 but it not display (and it has the WM_VISIBLE style)? What i'm missing? or what changed from winXP to win7? how can i do this to work on win7? Update: It's got something to do with aero theme, because if i change the desktop theme to the basic then the window is displayed, but if i switch back to one of the aero theme then is hided again. Thanks

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• Using a check contraint in MySQL for controlling string length

  - by ptrn

  I'm tumbled with a problem! I've set up my first check constraint using MySQL, but unfortunately I'm having a problem. When inserting a row that should fail the test, the row is inserted anyway. The structure: CREATE TABLE user ( id INT UNSIGNED NOT NULL AUTO_INCREMENT, uname VARCHAR(10) NOT NULL, fname VARCHAR(50) NOT NULL, lname VARCHAR(50) NOT NULL, mail VARCHAR(50) NOT NULL, PRIMARY KEY (id), CHECK (LENGTH(fname) > 30) ); The insert statement: INSERT INTO user VALUES (null, 'user', 'Fname', 'Lname', '[email protected]'); The length of the string in the fname column should be too short, but it's inserted anyway. I'm pretty sure I'm missing something basic here.

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• newb to assembly programming

  - by ida

  i am on a mac (10.6.3) with snow leopard. i hear that the assembly language i work with has to be valid with the chipset that you use. i am completly new to this i have a basic background in C and Objective-C programming and an almost strong background in php. Ive always wanted to see what assembly is all about. the tutorial ill be looking at is by VTC via (http://www.vtc.com/products/Assembly-Language-Programming-Tutorials.htm). what i want to know is are the tutorials that im about to do compatible with the version of mac that i have? sorry i am completly new to this language although i do recall studying some of it way way back in the day. i do have xcode and what i'm wondering is what kind of document would i open in xcode to work with assembly and does the mac have a built in hex editor (when it comes time to needing it)? thanks

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• URL flow when writing a wizard in PHP

  - by Brian

  Hello, I am writing a basic wizard for my web site. It will have 4 steps, and each needs to have its own URL. Each step must first validate a form before moving on. If the form for a given step fails to validate, I don't want the URL to change. But if it passes, I do want it to move on. What is the preferred way to write this? Using javascript alone to validate is not secure enough. I have 2 ideas so far but I don't love either: 1) Post the form to the same script and use a header() redirect to the next step if it passes. 2) Send an ajax post to validate and then use location.href to send user to the next step if it passes. Is there a better way to do this? Thanks, Brian

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