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• How do I render 3d model into directshow virtual camera output

  - by Mr Bell

  I want to provide a virtual webcam via DirectShow that will use the video feed from an existing camera running some tracking software against it to find the users face and then overlay a 3d model oriented just that it appears to move the users face. I am using a third party api to do the face tracking and thats working great. I get position and rotation data from that api. My question is whats the best way to render the 3d model and get into the video feed and out to direct show? I am using c++ on windows xp.

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• Uiscrollview displayed with focus at its center iphone sdk

  - by neha

  Hi all, I'm having a scrollview and a view over it both of which I'm creating through interface builder. But whenever I run the program the scrollview displays the part of the view which is almost at its center. It is scrollable, so when I pull it down, I can see the text in the view above but when I leave it's again positioned the earlier way i.e. somewhat down the actual (0,0) position. Can anybody hint me at the property which should be set in order to fix this?

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• Google Charts POLY problem with VS 2010 image map

  - by Davy

  Hi I am using http://code.google.com/apis/chart/docs/gallery/googleometer_chart.html I have: <img src="http://chart.apis.google.com/chart?cht=bvg&chs=250x150&chd=s:egbdf&chxt=x,y&chxs=0,ff0000,12,0,lt|1,0000ff,10,1,lt&chm=o,000000,0,-1,10|V,000000,0,-1,1:15,,:4:10|H,000000,0,-1,3:9,,:8:17&chxl=0:|E|G|B|D|F" usemap ="#chart" /> <map name='chart'> <area name='bar0_0' shape='POLY' coords= '124,440,124,499,143,440,143,498' href='#'> <area name='bar0_1' shape='RECT' coords='55,129,78,63' href='#'> </map> When I use 'rect' for shape I can attach a click event etc but when I use 'poly' It doesn't work. I've use a jQuery mouse position plug in to check the coords and they seem ok. Can anyone help please? Thanks

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• How to insert random characters in a text file at random positions using C

  - by Shantanu Gupta

  I m writing a program to insert random characters in a text file in between the text so that no one can understand this text. eg. suppose this is my text file a.txt with content as "Hi my name is abc. I like to play XYZ" Now i will cal a random function in C and get the 26 modulus random no to get the character to be inserted at random position. eg. "Him mayn mae lkd". etc How can i insert this random character in between the file.

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• Sanitizing incoming XML via WCF

  - by Clark

  I am consuming a Java webservice from .net using WCF. I am getting an error on deserialization of a response from the Java service The byte 0x00 is not valid at this location. Line 1, position 725. I know from some research that this is an incorrectly encoded null, but I am unlikely to get the provider to change it, so I would like to sanitize the null out before WCF deserializes the return message. Any Ideas? I am using c#, but answers in any CLR language will do.

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• Google Maps v3 InfoWindow Too Wide

  - by ryan

  In Google Maps v3, I can't seem to get my infoWindow to a width smaller than 200px. Here is the code I'm using: var latlng = new google.maps.LatLng(-34.397, 150.644); var myOptions = { zoom: 15, center: latlng, mapTypeId: google.maps.MapTypeId.ROADMAP }; var myMap = new google.maps.Map(document.getElementById("map_canvas"), myOptions); var gmarker = new google.maps.Marker({position: latLng,title:'Example'} ); var infoWindow = new google.maps.InfoWindow(); infoWindow.setOptions({maxWidth: 110}); window_content = '<div style="width:110px;height:110px;">Test</div>'; infoWindow.setContent(window_content); infoWindow.open(myMap, gmarker); Is there a way to get the infoWindow more narrow? Or am I stuck with a minimum width?

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• WCF DTO versions

  - by cvista

  Hi I have some services at the moment that return a dto with the following fields: [DataMember] public int Id { get; set; } [DataMember] public string Name { get; set; } and I want to add more to this service by adding the following properties: [DataMember] public virtual DateTime StartDate { get; set; } I'm not in a position where i can update the consumers of these services though - the client does that themselves. My question is - will the old clients be able to just skip these new properties? and the new ones take advantage of them or will the serialization be an issue with the new properties? w://

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• Synchronizing scroll positions for 2 WPF DataGrids

  - by Philipp Schmid

  I am trying to synchronize the horizontal scroll position of 2 WPF DataGrid controls. I am subscribing to the ScrollChanged event of the first DataGrid: <toolkit:DataGrid x:Name="SourceGrid" ScrollViewer.ScrollChanged="SourceGrid_ScrollChanged"> I have a second DataGrid: <toolkit:DataGrid x:Name="TargetGrid"> In the event handler I was attempting to use the IScrollInfo.SetHorizontalOffset, but alas, DataGrid doesn't expose IScrollInfo: private void SourceGrid_ScrollChanged(object sender, ScrollChangedEventArgs e) { ((IScrollInfo)TargetGrid).SetHorizontalOffset(e.HorizontalOffset); // cast to IScrollInfo fails } Is there another way to accomplish this? Or is there another element on TargetGrid that exposes the necessary IScrollInfo to achieve the synchronization of the scroll positions? BTW, I am using frozen columns, so I cannot wrap both DataGrid controls with ScrollViewers.

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• PHP job interview questions?

  - by Richard Knop

  Hello, I'm going to attend a job interview on Friday this week. It's an interview for a position of PHP programmer (the company doesn't do websites so I guess they just need somebody to administer their website). I'm expecting there will be more people at the interview and that we will be given some simple questions or tasks in PHP so they can choose. I'd like to ask if anybody has any experience with interviews like this, what should I be expecting? What are the most common questions or simple tasks/programs in PHP employers give to potential employees? Thanks.

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• Laws of Computer Science and Programming

  - by Jonas

  We have Amdahl's law that basically states that if your program is 10% sequential you can get a maximum 10x performance boost by parallelizing your application. Another one is Wadler's law which states that In any language design, the total time spent discussing a feature in this list is proportional to two raised to the power of its position. 0. Semantics 1. Syntax 2. Lexical syntax 3. Lexical syntax of comments My question is this: What are the most important (or at least significant / funny but true / sad but true) laws of Computer Science and programming? I want named laws, and not random theorems, So an answer should look something like Surname's (law|theorem|conjecture|corollary...) Please state the law in your answer, and not only a link. Edit: The name of the law does not need to contain it's inventors surname. But I do want to know who stated (and perhaps proved) the law

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• MouseWheel: Scrolling vs. Zooming

  - by beaudetious

  I've got a Silverlight 4 custom control that basically is several Canvas elements wrapped inside a ScrollViewer. The user can set a property to determine whether to scroll or zoom when using their mouses wheel. In the custom control's MouseWheel event, I check to see if they want to scroll or zoom. If zooming, I determine the delta and modify the custom control's zoom level (which then handles the zooming code for me). The problem is that zooming won't start until the ScrollViewer's current position of the vertical scrollbar is at the top or bottom of the scrollbar. Once their, then the zooming works perfectly. Does anyone have any suggestions on how I can prevent scrolling completely so that I only zoom (when the user wants to zoom, that is)? Thanks!

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• Rotate a feature programatically Open Layers

  - by Ozaki

  TLDR I want to rotate a Feature in my open layers. I want it to face a certain heading that I am receiving from server. I know that you can make a feature spin on a point or so on: window.setInterval(function() {rotateFeature( pointFeature, 360 / 20, origin)}, 100); as from the open layers example. But I want to be able to face it towards a heading I am given, so. Can I face a feature towards a heading? Can I face a feature(image) in the same way? If not is it possible to automatically calculate the rotation required and position it that way? Or any ideas on how I could do this with the image? (hoping not to have 360 images) Thanks in advance.

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• Teach Perl as a first language?

  - by yossale

  I need to teach a non-programmer the basics of computer programming + some basic programming skills (- He's going to be in a position between the clients and the programmers , so the company requires him to learn the basic concepts of programming). I thought of Perl - You can teach it without getting into typing and pointers and it's syntax is very close to human (precious "bless" :) ) - but I'm a bit troubled because I feel like I'm going to "spoil" him for other languages in the future (C,C++,Java - What some people call "Real" languages) - exactly because of the reasons mentioned above. What do you think?

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• zoom_changed only triggers once in google maps api version 3 using MVC

  - by fredrik

  Hi, I'm trying to use the MVC objects in google maps version 3. What I can't seem to figure out is why my zoom_changed method is only invoked once. When I first load the map the zoom_changed method is invoked. But not when I zoom on the map. function MarkerWidget (options) { this.setValues(options); this.set('zoom', this.map.zoom); var marker = new google.maps.Marker({ icon : this.icon, mouseOverIcon : this.mouseOverIcon, orgIcon : this.orgIcon }); marker.bindTo('map', this); marker.bindTo('position', this); google.maps.event.addListener(marker, 'mouseover', this.onmouseover); google.maps.event.addListener(marker, 'mouseout', this.onmouseout); } MarkerWidget.prototype = new google.maps.MVCObject(); MarkerWidget.prototype.zoom_changed = function () { $.log(this, new Date()); } Shouldn't the map object fire the zoom event and notify all object's that has "this.set('zoom', this.map.zoom)" ? ..fredrik

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• How can I create a JTable where the first column is always in the JScrollPane viewport?

  - by voodoogiant

  What's the best way to set up a table in a JScrollPane such that the first column is always on the screen in the same position regardless of horizontal scrolling and overlaps columns that pass underneath? When the scrollbar is at the farthest left, the columns look normal, but as the user scrolls to the right, the secondary columns (2 and on) move underneath the first until the last column appears on the far right of the viewport? I found a sample taken from Eckstein's "Java Swing" book that sort of does this, but it doesn't allow resizing of the first column. I was thinking of some scheme where one JPanel held a horizontal struct and a table holding the secondary columns and another JPanel which floated over them (fixed regardless of scrolling). The struct would be to keep the viewport range constant as the first column floated around. Ideally I could do it with two tables using the same model, but I'm not sure if the whole idea is a naive solution.

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• Flash video playing on top of everything else in IE7

  - by Brett

  Hi everyone, I've been spending hours now reading up on IE7's issue with rendering Flash content on top of other elements, particularly navigation menus (this is often a problem with dropdown menus and Flash ad banners, for example). I've tried a few of the suggested solutions but none have worked for me so far. I'll do my best to explain the circumstances, and would appreciate any advice in the matter! Update At Mercator's request, I am providing a large code-sample to assist in any advice you might have. Consider the HTML below: <body> <div id="page-wrap"> <div id="content-wrap"> <div id="main"> <h1>Page Title</h1> <p>Paragraph text before video.</p> <div class="video-container"> <script type="text/javascript"> AC_FL_RunContent('id','player','name','player','width','480','height','294','src','player','allowscriptaccess','always','allowfullscreen','true','flashvars','file=mp4/VIDEO_FILE.mp4','movie','player' ); //end AC code </script> <noscript> <object id="player" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" name="player" width="480" height="294"> <param name="wmode" value="transparent" /> <param name="movie" value="player.swf" /> <param name="allowfullscreen" value="true" /> <param name="allowscriptaccess" value="always" /> <param name="flashvars" value="file=mp4/VIDEO_FILE.mp4" /> <embed wmode="transparent" type="application/x-shockwave-flash" id="player2" name="player2" src="player.swf" width="480" height="294" allowscriptaccess="always" allowfullscreen="true" flashvars="file=mp4/VIDEO_FILE.mp4" ></embed> </object> </noscript> </div> <p>Paragraph after video.</p> </div><!-- end main --> <div id="subContent"> <p>Sub-content.</p> </div><!-- end subContent --> <div id="content-clear"></div> </div><!-- end content-wrap --> </div><!-- end page-wrap --> <div id="footpanel"> <ul id="mainpanel"> <li id="panel-link"><a href="#"><span class="icon"></span>Panel Link</a> <div class="subpanel"> <h3><span> &ndash; </span>Panel Link</h3> <ul> <li><p>Revealed content</p></li> </ul> </div> </li> </ul> </div> <!-- END footpanel --> </body> Below are the non-presentational CSS selectors that apply to the divs above: body { /*no positioning styles applied */ } #page-wrap { width: 100%; } #content-wrap { width: 960px; margin 0 auto; } #main { float: left; width: 573px; } .video-container { position: relative; width: 480px; z-index: 1; } #sub { float: left; width: 347px; } #content-clear { clear: both; } #foot-panel { position: fixed; width: 94%; bottom: 0; left: 0; z-index: 3000; } ul#main-panel { float: left; } The footpanel uses jQuery-powered flyout menus, if that provides any further context. These menus have z-indexes in the 300X range to appear above the footpanel. The Flash in question is JW player playing a flash video or mp4. Currently, the object and embed tags are inside a container div. My understanding of previous solutions was that the combination of the param changes and the positioning/z-index change on the container div should have resolved the issue. Alas, it is not so. The player resides on top of the footpanel. Other information that may or may not be helpful is that the page is XHTML 1.0 Transitional and that Dreamweaver reports 1 error in the HTML code: <embed> is not in the XHTML 1.0 specification. This fact does not prevent the video from being viewed in any browser tested, and the page still displays correctly in FF. Thanks in advance!

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• How can I scale an image in a CSS sprite

  - by michael

  Hi, In this article, http://css-tricks.com/css-sprites/, it talks about how can I crop off a smaller image from 1 bigger image. Can you please tell me if it is possible/how I can crop off a smaller image and then scale the cropped off region before I lay it out? Here is an example from that article: A { background-image: url(http://www.jaredhirsch.com/coolrunnings/public_images/3deb155981/spriteme1.png); background-position: -10px -56px; } I would like to know how can I scale that image after I crop it from from spriteme1.png Here is the URL of the example: http://css-tricks.com/examples/CSS-Sprites/Example1After/ So I would like to know if I can make the icons next to Item1,2,3,4 smaller?

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• Order by nullable property simultaneously with ordering by not nullable property in HQL

  - by Episodex

  Hi, I have a table called Users in my database. Let's assume that User has only 3 properties int ID; string? Name; string Login; If user doesn't specify his name then Login is displayed. Otherwise Name is displayed. I wan't to get list of all users sorted by what is displayed. So if user specified Name, it is taken into consideration while sorting, otherwise his position on the list should be determined by Login. Eventually whole list should be ordered alphabetically. I hope I made myself clear... Is that possible to do in HQL?

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• Absolutely positioned element inside fixed positioned element

  - by Salman A

  Related to my previous question, I have a <div style="position: fixed;"> footer. The footer contains <a style="display: block; float: left;"> elements. Upon clicking one of these links I want a div to popup above that link. I am experimenting with a couple of CSS settings and got acceptable results but I am not sure if my CSS will work across browsers. I am wondering if some one can tell me a bullet proof and tested CSS solution to achieve something like this:

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• Changing a Container while using Visitor

  - by Florian

  Hi everyone, I implemented the Visitor pattern in C++ using a STL-like iterator for storing the Visitor's current position in the container. Now I would like to change the container while I iterate over it, and I'm especially interested in deleting items from the container, even the one I'm currently visiting. Now obviously this will invalidate the Visitors internal iterator, because it was pointing to exactly this item. Currently, I store a list of all iterators in the container and update them, as soon as anything is added to or removed from the list. So in a way this is similar to the Observer pattern applied to the iterator (as Observer) and the list (as Observable). Alternatively I considered having the visitor() methods return some hint to the Visitor about what happend to the current item and how to proceed iterating, but that doesn't sound like such a good idea either, because the visit() implementation shouldn't really care about finding the next item. So, my question is: What's the best way to keep a visitor working, even when items are added to the container or removed from it. Regards, Florian

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• Microsoft Flight Simulator SDK Capabilities

  - by Roger

  Hello, I have not been able to find detailed documentation about the Microsoft Flight Simulator SDK, so I have a couple of questions regarding its capabilities. I am currently running FS2004(could buy FSX if needed) and would like to know if I could add moving or static boats through the SDK. Ideally, the boat's position would be controlled by an external program at runtime. Secondly, can i access the flight management system through the SDK? I would like to upload a custom flight path through an external program while the plane is flying. So why the plane would follow the original flight path I would like to be able to change it on the go. Thanks

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• how to invoke onclick function in html from vb.net or C#

  - by vbNewbie

  I am trying to invoke the onclick function in an html page that displays content. I am using the httpwebreqest control and not a browser control. I have traced the function and tried to find the link it calls but looking at the code below I tried inserting the link into the browser with the main url but it does not work. <div style="position:relative;" id="column_container"> <a href="#" onclick=" if (! loading_next_page) { loading_next_page = true; $('loading_recs_spinner').style.visibility = 'visible'; **new Ajax.Request('/recommendations?directory=non-profit&page=**' + next_page, { onComplete: function(transport) { if (200 == transport.status){ $('column_container').insert({ bottom: transport.responseText }); loading_next_page = false; $('loading_recs_spinner').style.visibility = 'hidden'; next_page += 1; if (transport.responseText.blank()) $('show_more_recs').hide(); } } }); } return false; Any ideas would be deeply appreciated.

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• CSS Trouble, Why does it move itself?

  - by Patrick

  Hello! I am stuck on the CSS part, am helping a friend to implement one thing on her webpage. Its a dropdown menu and i got everything working the way i want it to. My problem is that it moves itself to the beginning of the row? http://gazet.se/TestPages/Test.aspx Its just below the logo and as you can see, its on the correct line but not in the correct position (should be between the purple "Nyhetsbrev" and the black "Experthörnan"-images, but it ends up on the beginning of the row instead? Any ideas?

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• Address calling class [Java]

  - by Samuel

  Hello! [I am rather new to Java and Object Oriented programming] I have an abstract class Moveable with the method abstract void move() which is extended by the class Bullet and the abstract class Character, and Character is extended by the class Survivor and the class Zombie. In Survivor and Bullet the move() method doesnt require any parameters while in the class Zombie the move() method depends on the actual position of the survivor. The survivor and multiple zombies are created in the class Gui. I wanted to access the survivor in Zombie - what's the best way of doing this? In Gui i wrote a method getSurvivor() but i don't see how to access this method in Zombie? I am aware that as a workaround i could just pass a [Survivor survivor] as parameter in move() and ignore it in Bullet and Survivor, but that feels so ... bad practice. Thank you for your time! Samuel [I am not sure what tags to set here, please correct me if i'm wrong]

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• Objective C / iPhone comparing 2 CLLocations /GPS coordinates help

  - by user289503

  Ok , so thanks to Claus Broch I made some progress with comparing two GPS locations. I need to be able to say "IF currentlocation IS EQUAL TO (any GPS position from a list ) THEN do something My code at the moment is : CLLocationCoordinate2D bonusOne; bonusOne.latitude = 37.331689; bonusOne.longitude = -122.030731; Which is the simulators GPS location at Infinite Loop CLLocation *loc1 = [[CLLocation alloc] initWithLatitude:bonusOne.latitude longitude:bonusOne.longitude]; double distance = [loc1 getDistanceFrom:newLocation]; if(distance <= 10000000) { Then do something } Any number under 10000000 and it assumes that there is no match. Any ideas ? Thanks is advance.

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