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  • How do I prevent jagged edges alongside the surfaces of my 3d model?

    - by badcodenotreat
    Lets say I've implemented in openGL a crude model viewer with shading which renders a series of blocks, such that I have something that looks like this. http://i.imgur.com/TsF7K.jpg Whenever I rotate my model to the side, it causes an unwanted jagged effect along any surface with a steep viewing angle. http://i.imgur.com/Bgl9o.jpg I'm pretty sure this is due to the polygon offset I used to prevent z-fighting between the model and the wireframe, however I'm not able to find the factor/unit parameters in openGL which prevent this unwanted effect. what are the best values of factor and unit for glPolygonOffset to prevent this? would implementing anti-aliasing alleviate the problem? is the trade off in performance trivial/significant? is this perhaps a shading issue? should i try a solution along this line of thought?

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  • Static Evaluation Function for Checkers

    - by Kamikaze
    Hi all! I'm trying to write an evaluation function for a game of checkers that I'm developing but I can't find the right documentation. I've read several documents on the web witch describe different techniques for either writing one or letting the computer find it(using genetic algorithms or Bayesian learning) but they're too complicated for a novice like me. All documents pointed a reference to "Some studies in machine learning using the game of checkers" by A.L.Samuel but I couldn't get my hands on it yet :(. I've only read the follow up "Some studies in machine learning using the game of checkers -II" and found some good info there, but it doesn't explain what the eval parameters mean (I think I don't have the whole article). Thanks for your help!

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  • How to access "overridden" inner class in Scala?

    - by doom2.wad
    I have two traits, one extending the other, each with an inner class, one extending the other, with the same names: trait A { class X { def x() = doSomething() } } trait B extends A { class X extends super.X { override def x() = doSomethingElse() } } class C extends B { val x = new X() // here B.X is instantiated val y = new A.X() // does not compile val z = new A.this.X() // does not compile } How do I access A.X class in the C class's body? Renaming B.X not to hide A.X is not a preferred way. To make things a bit complicated, in the situation I have encountered this problem the traits have type parameters (not shown in this example).

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  • Performance analysis strategies

    - by Bernd
    I am assigned to a performance-tuning-debugging-troubleshooting task. Scenario: a multi-application environment running on several networked machines using databases. OS is Unix, DB is Oracle. Business logic is implemented across applications using synchronous/asynchronous communication. Applications are multi-user with several hundred call center users at peak time. User interfaces are web-based. Applications are third party, I can get access to developers and source code. I only have the production system and a functional test environment, no load test environment. Problem: bad performance! I need fast results. Management is going crazy. I got symptom examples like these: user interface actions taking minutes to complete. Seaching for a customer usually takes 6 seconds but an immediate subsequent search with same parameters may take 6 minutes. What would be your strategy for finding root causes?

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  • MVC routing - why does my request not match the route?

    - by Anders Juul
    Hi all, I'm making a request that I thought would be caught by my route, but there is no match. What am I doing wrong? Any comments appreciated, Anders, Denmark -- Url : EventReponse/ComingAdmin/386/01e71c45-cb67-4711-a51f-df5fcb54bb8b Expected match: routes.MapRoute( "Editing event responses for other user", // Route name "EventResponse/{action}/{eventId}/userId", // URL with parameters new {controller = "EventResponse", action = "ComingAdmin"} // Parameter defaults ); Desired controller (but I guess this does not come into play): public class EventResponseController : ControllerBase { (...) public ActionResult ComingAdmin(int eventId, Guid userId) { return RegisterEventResponse(eventId, AttendanceStatus.Coming, userId); } }

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  • MS SQL Server: how to optimize "like" queries?

    - by duke84
    I have a query that searches for clients using "like" with wildcard. For example: SELECT TOP (10) [t0].[CLIENTNUMBER], [t0].[FIRSTNAME], [t0].[LASTNAME], [t0].[MI], [t0].[MDOCNUMBER] FROM [dbo].[CLIENT] AS [t0] WHERE (LTRIM(RTRIM([t0].[DOCREVNO])) = '0') AND ([t0].[FIRSTNAME] LIKE '%John%') AND ([t0].[LASTNAME] LIKE '%Smith%') AND ([t0].[SSN] LIKE '%123%') AND ([t0].[CLIENTNUMBER] LIKE '%123%') AND ([t0].[MDOCNUMBER] LIKE '%123%') AND ([t0].[CLIENTINDICATOR] = 'ON') It can also use less parameters in "where" clause, for example: SELECT TOP (10) [t0].[CLIENTNUMBER], [t0].[FIRSTNAME], [t0].[LASTNAME], [t0].[MI], [t0].[MDOCNUMBER] FROM [dbo].[CLIENT] AS [t0] WHERE (LTRIM(RTRIM([t0].[DOCREVNO])) = '0') AND ([t0].[FIRSTNAME] LIKE '%John%') AND ([t0].[CLIENTINDICATOR] = 'ON') Can anybody tell what is the best way to optimize performance of such query? Maybe I need to create an index? This table can have up to 1000K records in production.

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  • SVM in OpenCV: Visual Studio 2008 reported error wrongly (or is it right?)

    - by Risa
    I'm using MS Visual Studio 2008, OpenCV, C++ and SVM for a OCR-related project. At least I can run the code until yesterday, when I open the project to continue working, VS reported this error: error C2664: 'bool CvSVM::train(const CvMat *,const CvMat *,const CvMat *,const CvMat *,CvSVMParams)' : cannot convert parameter 1 from 'cv::Mat' to 'const CvMat *' It didn't happen before and I haven't changed any code relating to it (I only changed the parameters for the kernel). The code got error is: Mat curTrainData, curTrainLabel; CvSVM svm; . . . svm.train(curTrainData, curTrainLabel, Mat(), Mat(), params); If I hover on the code, I still got this tip: image. Which means my syntax isn't wrong. So why do VS bother to report such an error?

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  • Get jQuery post redirect response

    - by Wickethewok
    I've written some HTML/Javascript that sits on a third-party server for security reasons. This page performs a javascript post to another page on the same site. However, instead of responding with useful data, it instead wants to perform a redirect (if you would post via a normal HTML form to this page, it would redirect your browser). How can I process this process? I basically want to be able to extract the url's query parameters that it is trying to redirect with (and then put this link into a hidden form field). Here is my basic ajax post... $.ajax({ url: '/someurl/idontcontrol', data: serialized_form_data, async: false, type: 'POST', success: function(data, textStatus) { $('#redirect_link').val(WHAT_DO_I_PUT_HERE); } }); Note that the URL I am posting to is not one that I control, so I have no power over what it returns. Thanks!

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  • AJAX, PHP, XML, and cascading drop-down lists

    - by Dave Jarvis
    What PHP libraries would you recommend to implement the following: Three dependent drop-down lists Three XML data sources AJAX-based Essentially, I'd like to create an XML database and wire up a form that allows the user to select three different dependent parameters: User clicks Region User clicks District (filtered by Region) User clicks Station (filtered by District) Even though I would like to use PHP and XML, the general problem is: One XHTML form Three dependent, cascading drop-down lists Three flat files (no relational database) for the list data The solution must be efficient, simple, reliable, and cross-browser. What technologies would you recommend to solve the problem? Thank you!

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  • Serializing an object into the body of a WCF request using webHttpBinding

    - by Bert
    I have a WCF service exposed with a webHttpBinding endpoint. [OperationContract(IsOneWay = true)] [WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare, UriTemplate = "/?action=DoSomething&v1={value1}&v2={value2}")] void DoSomething(string value1, string value2, MySimpleObject value3); In theory, if I call this, the first two parameters (value1 & value 2) are taken from the Uri and the final one (value3) should be deserialized from the body of the request. Assuming I am using Json as the RequestFormat, what is the best way of serialising an instance of MySimpleObject into the body of the request before I send it ? This, for instance, does not seem to work : HttpWebRequest sendRequest = (HttpWebRequest)WebRequest.Create(url); sendRequest.ContentType = "application/json"; sendRequest.Method = "POST"; using (var sendRequestStream = sendRequest.GetRequestStream()) { DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(typeof(MySimpleObject)); jsonSerializer.WriteObject(sendRequestStream, obj); sendRequestStream.Close(); } sendRequest.GetResponse().Close();

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  • Nutch - how to crawl by small patches?

    - by Yurish
    Hi everyone! I am stuck! Can`t get Nutch to crawl for me by small patches. I start it by bin/nutch crawl command with parameters -depth 7 and -topN 10000. And it never ends. Ends only when my HDD is empty. What i need to do: Start to crawl my seeds with possibility to go further on outlinks. Crawl 20000 pages, then index them. Crawl another 20000 pages, index them and merge with first index. Loop step 3 n times. Tried also with scripts found in wiki, but all scripts i found don't go further. If i run them again, they do everything from beginning. And in the end of script i have the same index i had, when started to crawl. But, i need to continue my crawl. Some help would be very usefull!

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  • eclipse xdebug session never completes

    - by Scott
    I am trying to get xdebug working with eclipse (3.5) / php (on xampp windows 7). I have verified xdebug is enabled in php - I have the fancy output and my phpinfo shows all the xdebug stuff. I have remote debug on, and typed in the lan ip address on my eclipse machine. When I tell eclipse to debug, it launches the browser and passes the debug URL parameters. That looks OK. However, in eclipse debug perspective it shows 'launching myproject' 57% 'waiting for xdebug session'. It sits there forever. I have turned off windows firewall on both machines. I tried turning implicit flush on. Any ideas?

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  • RSA encrypted Diffie-Hellman handshake

    - by cmaduro
    Would a RSA encrypted Diffie-Hellman handshake enable secure communication? I'm encrypting communication from a silverlight client to a php webservice. The silverlight client initiates they key agreement by sending the RSA public key encrypted DH parameters to the webservice. Only the webservice has the private key, so a MITM attack is not possible. The webservice sends plain text answer back to the client, and a key is agreed upon. This key is then used to encrypt communication between the webservice and silverlight client with AES, which is also encrypted with the RSA public key. Does anyone see a flaw?

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  • Scala method where type of second parameter equals part of generic type from first parameter

    - by ifischer
    I want to create a specific generic method in Scala. It takes two parameters. The first is of the type of a generic Java Interface (it's from the JPA criteria query). It currently looks like this: def genericFind(attribute:SingularAttribute[Person, _], value:Object) { ... } // The Java Interface which is the type of the first parameter in my find-method: public interface SingularAttribute<X, T> extends Attribute<X, T>, Bindable<T> Now i want to achieve the following: value is currently of type java.lang.Object. But I want to make it more specific. Value has to be the of the same type as the placeholder "_" from the first parameter (and so represents the "T" in the Java interface). Is that somehow possible, and how? BTW Sorry for the stupid question title (any suggestions?)

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  • iphone: how do I obtain a list of all files with a given extension on the app's document folder?

    - by Mike
    I have saved all my files using something like this NSString *fileName = [NSString stringWithFormat:@"%@.plist", myName]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *appFile = [documentsDirectory stringByAppendingPathComponent:fileName]; [myDict writeToFile:appFile atomically:YES]) //where myDic is a dictionary containing the value of all parameters I would like to save. All these files were saved with the .plist extension. The same directory contains several JPG and PNG files. Now, how do I retrieve the list of all .plist files on that directory? thanks for any help.

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  • Can't update textbox in TinyMCE

    - by Michael Tot Korsgaard
    I'm using TinyMCE, the text area is replaced with a TextBox, but when I try to update the database with the new text from my textbox, it wont update. Can anyone help me? My code looks like this <%@ Page Title="" Language="C#" MasterPageFile="~/Main.Master" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="Test_TinyMCE._default" ValidateRequest="false" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> <script src="JavaScript/tiny_mce/tiny_mce.js" type="text/javascript"></script> <script type="text/javascript"> tinyMCE.init({ // General options mode: "textareas", theme: "advanced", plugins: "pagebreak,style,layer,table,save,advhr,advimage,advlink,emotions,iespell,insertdatetime,pre view,media,searchreplace,print,contextmenu,paste,directionality,fullscreen,noneditable,visualchars,no nbreaking,xhtmlxtras,template,wordcount,advlist,autosave", // Theme options theme_advanced_buttons1: "save,newdocument,|,bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,styleselect,formatselect,fontselect,fontsizeselect", theme_advanced_buttons2: "cut,copy,paste,pastetext,pasteword,|,search,replace,|,bullist,numlist,|,outdent,indent,blockquote,|,undo,redo,|,link,unlink,anchor,image,cleanup,help,code,|,insertdate,inserttime,preview,|,forecolor,backcolor", theme_advanced_buttons3: "tablecontrols,|,hr,removeformat,visualaid,|,sub,sup,|,charmap,emotions,iespell,media,advhr,|,print,|,ltr,rtl,|,fullscreen", theme_advanced_buttons4: "insertlayer,moveforward,movebackward,absolute,|,styleprops,|,cite,abbr,acronym,del,ins,attribs,|,visualchars,nonbreaking,template,pagebreak,restoredraft", theme_advanced_toolbar_location: "top", theme_advanced_toolbar_align: "left", theme_advanced_statusbar_location: "bottom", theme_advanced_resizing: true, // Example content CSS (should be your site CSS) // using false to ensure that the default browser settings are used for best Accessibility // ACCESSIBILITY SETTINGS content_css: false, // Use browser preferred colors for dialogs. browser_preferred_colors: true, detect_highcontrast: true, // Drop lists for link/image/media/template dialogs template_external_list_url: "lists/template_list.js", external_link_list_url: "lists/link_list.js", external_image_list_url: "lists/image_list.js", media_external_list_url: "lists/media_list.js", // Style formats style_formats: [ { title: 'Bold text', inline: 'b' }, { title: 'Red text', inline: 'span', styles: { color: '#ff0000'} }, { title: 'Red header', block: 'h1', styles: { color: '#ff0000'} }, { title: 'Example 1', inline: 'span', classes: 'example1' }, { title: 'Example 2', inline: 'span', classes: 'example2' }, { title: 'Table styles' }, { title: 'Table row 1', selector: 'tr', classes: 'tablerow1' } ], // Replace values for the template plugin template_replace_values: { username: "Some User", staffid: "991234" } }); </script> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> <div> <asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine"></asp:TextBox> <br /> <asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click">Update</asp:LinkButton> </div> </asp:Content> My codebhind looks like this using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace Test_TinyMCE { public partial class _default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { TextBox1.Text = Database.GetFirst().Text; } protected void LinkButton1_Click(object sender, EventArgs e) { Database.Update(Database.GetFirst().ID, TextBox1.Text); TextBox1.Text = Database.GetFirst().Text; } } } And finally the "Database" class im using looks like this using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Configuration; using System.Data.SqlClient; namespace Test_TinyMCE { public class Database { public int ID { get; set; } public string Text { get; set; } public static void Update(int ID, string Text) { SqlConnection connection = new SqlConnection(ConfigurationManager.AppSettings["DatabaseConnection"]); connection.Open(); try { SqlCommand command = new SqlCommand("Update Text set Text=@text where ID=@id"); command.Connection = connection; command.Parameters.Add(new SqlParameter("id", ID)); command.Parameters.Add(new SqlParameter("text", Text)); command.ExecuteNonQuery(); } finally { connection.Close(); } } public static Database GetFirst() { SqlConnection connection = new SqlConnection(ConfigurationManager.AppSettings["DatabaseConnection"]); connection.Open(); try { SqlCommand command = new SqlCommand("Select Top 1 ID, Text from Text order by ID asc"); command.Connection = connection; SqlDataReader reader = command.ExecuteReader(); if (reader.Read()) { Database item = new Database(); item.ID = reader.GetInt32(0); item.Text = reader.GetString(1); return item; } else { return null; } } finally { connection.Close(); } } } } I really hope that someone out there can help me

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  • Getting 401 on Twitter OAuth POST requests

    - by Baishampayan Ghose
    I am trying to use Twitter OAuth and my POST requests are failing with a 401 (Invalid OAuth Request) error. For example, if I want to post a new status update, I am sending a HTTP POST request to https://twitter.com/statuses/update.json with the following parameters - status=Testing&oauth_version=1.0&oauth_token=xxx& oauth_nonce=xxx&oauth_timestamp=xxx&oauth_signature=xxx& oauth_consumer_key=xxx&in_reply_to=xxx&oauth_signature_method=HMAC-SHA1` My GET requests are all working fine. I can see on the mailing lists that a lot of people have had identical problems but I could not find a solution anywhere. I am using the oauth.py Python library.

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  • How do I execute file installed by merge module?

    - by Juozas Kontvainis
    I am using WIX and have successfully used a custom action to execute installed file at the end of installer like this: <CustomAction Id="LaunchAfterInstall" FileKey="foobar.exe" ExeCommand="parameters" Execute="immediate" Impersonate="yes" Return="asyncNoWait" /> <Property Id="WIXUI_INSTALLDIR" Value="INSTALLLOCATION"/> <UIRef Id="WixUI_InstallDir" /> <Property Id="WIXUI_EXITDIALOGOPTIONALCHECKBOXTEXT" Value="Launch Foobar." /> <UI> <Publish Dialog="ExitDialog" Control="Finish" Order="1" Event="DoAction" Value="LaunchAfterInstall">WIXUI_EXITDIALOGOPTIONALCHECKBOX</Publish> </UI> This works well when foobar.exe is in a component in the same wxs file. However what I really want is to execute a file that is installed by a merge module. How do I do this? I can make changes in the merge module, if this helps things.

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  • Twisted Python getPage

    - by David Dixon II
    I tried to get support on this but I am TOTALLY confused. Here's my code: from twisted.internet import reactor from twisted.web.client import getPage from twisted.web.error import Error from twisted.internet.defer import DeferredList from sys import argv class GrabPage: def __init__(self, page): self.page = page def start(self, *args): if args == (): # We apparently don't need authentication for this d1 = getPage(self.page) else: if len(args) == 2: # We have our login information d1 = getPage(self.page, headers={"Authorization": " ".join(args)}) else: raise Exception('Missing parameters') d1.addCallback(self.pageCallback) dl = DeferredList([d1]) d1.addErrback(self.errorHandler) dl.addCallback(self.listCallback) def errorHandler(self,result): # Bad thingy! pass def pageCallback(self, result): return result def listCallback(self, result): print result a = GrabPage('http://www.google.com') data = a.start() # Not the HTML I wish to get the HTML out which is given to pageCallback when start() is called. This has been a pita for me. Ty! And sorry for my sucky coding.

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  • Re-send POST request easily - what tools?

    - by Fabien
    I am looking for an easy way to re-send POST request to the server within the browser mainly for debug purposes. Say you have a XHR request which contains POST parameters that is to be send to the server. After having changed the script on the server side, you would like to resent the very same request for analyzing the output. What tool could help? I guess it is a browser's extension. I already tried extension Tamper Data for Firefox which does the job as you can "Replay in browser". But for my taste, it is not enough straight forward, as there are 3 - 4 clicks to get the result of the request. Unfortunately, curl would not be suitable for my needs as my application has a session's cookie.

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  • How to use browser options in selenium?

    - by Guru1985
    I have a browser which takes certain parameters as options as shown below. testbrowser.exe -id=test -url=http://www.google.com/. Below is my selenium code. selenium = new DefaultSelenium("localhost", 4444, "*custom "+testBrowser+" -id=test -url=", "http://www.google.com/"); selenium.start(); selenium.open("http://www.yahoo.com"); When i execute this i am getting the below error. java.lang.RuntimeException: Could not start Selenium session: Failed to start new browser session: Error while launching browser at com.thoughtworks.selenium.DefaultSelenium.start(DefaultSelenium.java:103) I think the problem is with options that my browser requires as the same code works fine with firefox or IE. Please help me in solving this options issue. Thanks in Advance Gururaj R

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  • Actionscript 3 reflection class questions

    - by VPDD
    I found this reflection class: http://www.adobe.com/devnet/flash/articles/reflect_class_as3.html However, I have some questions about it. Let´s say I have a moviclip named “ref_mc”, to add a reflection I use: import com.pixelfumes.reflect.*; var r1:Reflect = new Reflect({mc:ref_mc, alpha:50, ratio:50, distance:0, updateTime:0, reflectionDropoff:1}); Now, the questions: 1) How do I update the parameters for the reflection r1 after it is created? 2) Is there a way to check whether the movieclip “ref_mc” already has a reflection? 3) Anyone has the .fla for the example with bars adjustments and code sample shown on the page (it is not on the download .zip)? Thanks in advance.

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  • How to stop nant exec task putting ( ) around command line

    - by Sam
    I have looked through the nant documentation and sourceforge faq and can't find the answer to this question. The exec task in nant puts ( ) around the command line parameters it generates, so for example this task below would generate: mallow ( -1 ) <exec program="${build.tools.wix}\mallow.exe" workingdir="${build.out.xxx}"> <arg value="-1" /> </exec> The other open source tool I'm using - mallow - cannot handle this. Does anyone know of a way to stop nant putting the ( ) around the arguments? Thanks.

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  • Search database with textbox/button, display record in detailsview and update fields

    - by AB
    Hello, I am trying to do all on one page. There are 3 textboxes and 3 buttons, one sqldatasource and one detailsview. Sqidatasource is configured to take parameters from textboxes and ingnore blank textboxes to be able to search by one (any) field at the time. When I do "test query" in sqldatasource - everything is working. Deatailsview is set to have sqldatasoure as datasourse. On each button I do detailsview.databind() but nothing is showing up. Need help, thank you.

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  • eclipse xdebug session never completes

    - by Scott Szretter
    I am trying to get xdebug working with eclipse (3.5) / php (on xampp windows 7). I have verified xdebug is enabled in php - I have the fancy output and my phpinfo shows all the xdebug stuff. I have remote debug on, and typed in the lan ip address on my eclipse machine. When I tell eclipse to debug, it launches the browser and passes the debug URL parameters. That looks OK. However, in eclipse debug perspective it shows 'launching myproject' 57% 'waiting for xdebug session'. It sits there forever. I have turned off windows firewall on both machines. I tried turning implicit flush on. Any ideas?

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