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  • Compute directional light frustum from view furstum points and light direction

    - by Fabian
    I'm working on a friends engine project and my task is to construct a new frustum from the light direction that overlaps the view frustum and possible shadow casters. The project already has a function that creates a frustum for this but its way to big and includes way to many casters (shadows) which can't be seen in the view frustum. Now the only parameter of this function are the normalized light direction vector and a view class which lets me extract the 8 view frustum points in world space. I don't have any additional infos about the scene. I have read some of the related Questions here but non seem to fit very well to my problem as they often just point to cascaded shadow maps. Sadly i can't use DX or openGl functions directly because this engine has a dedicated math library. From what i've read so far the steps are: Transform view frustum points into light space and find min/max x and y values (or sometimes minima and maxima of all three axis) and create a AABB using the min/max vectors. But what comes after this step? How do i transform this new AABB back to world space? What i've done so far: CVector3 Points[8], MinLight = CVector3(FLT_MAX), MaxLight = CVector3(FLT_MAX); for(int i = 0; i<8;++i){ Points[i] = Points[i] * WorldToShadowMapMatrix; MinLight = Math::Min(Points[i],MinLight); MaxLight = Math::Max(Points[i],MaxLight); } AABox box(MinLight,MaxLight); I don't think this is the right way to do it. The near plain probably has to extend into the direction of the light source to include potentional shadow casters. I've read the Microsoft article about cascaded shadow maps http://msdn.microsoft.com/en-us/library/windows/desktop/ee416307%28v=vs.85%29.aspx which also includes some sample code. But they seem to use the scenes AABB to determine the near and far plane which I can't since i cant access this information from the funtion I'm working in. Could you guys please link some example code which shows the calculation of such frustum? Thanks in advance! Additional questio: is there a way to construct a WorldToFrustum matrix that represents the above transformation?

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  • How to manually patch Blogger template to use Disqus

    - by user317944
    I'm trying to add disqus to my blog and I tried following this guide to do so: http://disqus.com/docs/patch-blogger/ However their instructions are completely off with what I have on my custom template. Here is the template: <b:skin><![CDATA[/*----------------------------------------------- Blogger Template Style Name: Picture Window Designer: Josh Peterson URL: www.noaesthetic.com ----------------------------------------------- */ /* Variable definitions ==================== */ /* Content ----------------------------------------------- */ body { font: $(body.font); color: $(body.text.color); } html body .region-inner { min-width: 0; max-width: 100%; width: auto; } .content-outer { font-size: 90%; } a:link { text-decoration:none; color: $(link.color); } a:visited { text-decoration:none; color: $(link.visited.color); } a:hover { text-decoration:underline; color: $(link.hover.color); } .body-fauxcolumn-outer { background: $(body.background); } .content-outer { background: $(content.background); -moz-border-radius: $(content.border.radius); -webkit-border-radius: $(content.border.radius); -goog-ms-border-radius: $(content.border.radius); border-radius: $(content.border.radius); -moz-box-shadow: 0 0 $(content.shadow.spread) rgba(0, 0, 0, .15); -webkit-box-shadow: 0 0 $(content.shadow.spread) rgba(0, 0, 0, .15); -goog-ms-box-shadow: 0 0 $(content.shadow.spread) rgba(0, 0, 0, .15); box-shadow: 0 0 $(content.shadow.spread) rgba(0, 0, 0, .15); margin: $(content.margin) auto; } .content-inner { padding: $(content.padding); } /* Header ----------------------------------------------- */ .header-outer { background: $(header.background.color) $(header.background.gradient) repeat-x scroll top left; _background-image: none; color: $(header.text.color); -moz-border-radius: $(header.border.radius); -webkit-border-radius: $(header.border.radius); -goog-ms-border-radius: $(header.border.radius); border-radius: $(header.border.radius); } .Header img, .Header #header-inner { -moz-border-radius: $(header.border.radius); -webkit-border-radius: $(header.border.radius); -goog-ms-border-radius: $(header.border.radius); border-radius: $(header.border.radius); } .header-inner .Header .titlewrapper, .header-inner .Header .descriptionwrapper { padding-left: $(header.padding); padding-right: $(header.padding); } .Header h1 { font: $(header.font); text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3); } .Header h1 a { color: $(header.text.color); } .Header .description { font-size: 130%; } /* Tabs ----------------------------------------------- */ .tabs-inner { margin: .5em $(tabs.margin.sides) $(tabs.margin.bottom); padding: 0; } .tabs-inner .section { margin: 0; } .tabs-inner .widget ul { padding: 0; background: $(tabs.background.color) $(tabs.background.gradient) repeat scroll bottom; -moz-border-radius: $(tabs.border.radius); -webkit-border-radius: $(tabs.border.radius); -goog-ms-border-radius: $(tabs.border.radius); border-radius: $(tabs.border.radius); } .tabs-inner .widget li { border: none; } .tabs-inner .widget li a { display: block; padding: .5em 1em; margin-$endSide: $(tabs.spacing); color: $(tabs.text.color); font: $(tabs.font); -moz-border-radius: $(tab.border.radius) $(tab.border.radius) 0 0; -webkit-border-top-left-radius: $(tab.border.radius); -webkit-border-top-right-radius: $(tab.border.radius); -goog-ms-border-radius: $(tab.border.radius) $(tab.border.radius) 0 0; border-radius: $(tab.border.radius) $(tab.border.radius) 0 0; background: $(tab.background); border-$endSide: 1px solid $(tabs.separator.color); } .tabs-inner .widget li:first-child a { padding-$startSide: 1.25em; -moz-border-radius-top$startSide: $(tab.first.border.radius); -moz-border-radius-bottom$startSide: $(tabs.border.radius); -webkit-border-top-$startSide-radius: $(tab.first.border.radius); -webkit-border-bottom-$startSide-radius: $(tabs.border.radius); -goog-ms-border-top-$startSide-radius: $(tab.first.border.radius); -goog-ms-border-bottom-$startSide-radius: $(tabs.border.radius); border-top-$startSide-radius: $(tab.first.border.radius); border-bottom-$startSide-radius: $(tabs.border.radius); } .tabs-inner .widget li.selected a, .tabs-inner .widget li a:hover { position: relative; z-index: 1; background: $(tabs.selected.background.color) $(tab.selected.background.gradient) repeat scroll bottom; color: $(tabs.selected.text.color); -moz-box-shadow: 0 0 $(region.shadow.spread) rgba(0, 0, 0, .15); -webkit-box-shadow: 0 0 $(region.shadow.spread) rgba(0, 0, 0, .15); -goog-ms-box-shadow: 0 0 $(region.shadow.spread) rgba(0, 0, 0, .15); box-shadow: 0 0 $(region.shadow.spread) rgba(0, 0, 0, .15); } /* Headings ----------------------------------------------- */ h2 { font: $(widget.title.font); text-transform: $(widget.title.text.transform); color: $(widget.title.text.color); margin: .5em 0; } /* Main ----------------------------------------------- */ .main-outer { background: $(main.background); -moz-border-radius: $(main.border.radius.top) $(main.border.radius.top) 0 0; -webkit-border-top-left-radius: $(main.border.radius.top); -webkit-border-top-right-radius: $(main.border.radius.top); -webkit-border-bottom-left-radius: 0; -webkit-border-bottom-right-radius: 0; -goog-ms-border-radius: $(main.border.radius.top) $(main.border.radius.top) 0 0; border-radius: $(main.border.radius.top) $(main.border.radius.top) 0 0; -moz-box-shadow: 0 $(region.shadow.offset) $(region.shadow.spread) rgba(0, 0, 0, .15); -webkit-box-shadow: 0 $(region.shadow.offset) $(region.shadow.spread) rgba(0, 0, 0, .15); -goog-ms-box-shadow: 0 $(region.shadow.offset) $(region.shadow.spread) rgba(0, 0, 0, .15); box-shadow: 0 $(region.shadow.offset) $(region.shadow.spread) rgba(0, 0, 0, .15); } .main-inner { padding: 15px $(main.padding.sides) 20px; } .main-inner .column-center-inner { padding: 0 0; } .main-inner .column-left-inner { padding-left: 0; } .main-inner .column-right-inner { padding-right: 0; } /* Posts ----------------------------------------------- */ h3.post-title { margin: 0; font: $(post.title.font); } .comments h4 { margin: 1em 0 0; font: $(post.title.font); } .post-outer { background-color: $(post.background.color); border: solid 1px $(post.border.color); -moz-border-radius: $(post.border.radius); -webkit-border-radius: $(post.border.radius); border-radius: $(post.border.radius); -goog-ms-border-radius: $(post.border.radius); padding: 15px 20px; margin: 0 $(post.margin.sides) 20px; } .post-body { line-height: 1.4; font-size: 110%; } .post-header { margin: 0 0 1.5em; color: $(post.footer.text.color); line-height: 1.6; } .post-footer { margin: .5em 0 0; color: $(post.footer.text.color); line-height: 1.6; } blog-pager { font-size: 140% } comments .comment-author { padding-top: 1.5em; border-top: dashed 1px #ccc; border-top: dashed 1px rgba(128, 128, 128, .5); background-position: 0 1.5em; } comments .comment-author:first-child { padding-top: 0; border-top: none; } .avatar-image-container { margin: .2em 0 0; } /* Widgets ----------------------------------------------- */ .widget ul, .widget #ArchiveList ul.flat { padding: 0; list-style: none; } .widget ul li, .widget #ArchiveList ul.flat li { border-top: dashed 1px #ccc; border-top: dashed 1px rgba(128, 128, 128, .5); } .widget ul li:first-child, .widget #ArchiveList ul.flat li:first-child { border-top: none; } .widget .post-body ul { list-style: disc; } .widget .post-body ul li { border: none; } /* Footer ----------------------------------------------- */ .footer-outer { color:$(footer.text.color); background: $(footer.background); -moz-border-radius: $(footer.border.radius.top) $(footer.border.radius.top) $(footer.border.radius.bottom) $(footer.border.radius.bottom); -webkit-border-top-left-radius: $(footer.border.radius.top); -webkit-border-top-right-radius: $(footer.border.radius.top); -webkit-border-bottom-left-radius: $(footer.border.radius.bottom); -webkit-border-bottom-right-radius: $(footer.border.radius.bottom); -goog-ms-border-radius: $(footer.border.radius.top) $(footer.border.radius.top) $(footer.border.radius.bottom) $(footer.border.radius.bottom); border-radius: $(footer.border.radius.top) $(footer.border.radius.top) $(footer.border.radius.bottom) $(footer.border.radius.bottom); -moz-box-shadow: 0 $(region.shadow.offset) $(region.shadow.spread) rgba(0, 0, 0, .15); -webkit-box-shadow: 0 $(region.shadow.offset) $(region.shadow.spread) rgba(0, 0, 0, .15); -goog-ms-box-shadow: 0 $(region.shadow.offset) $(region.shadow.spread) rgba(0, 0, 0, .15); box-shadow: 0 $(region.shadow.offset) $(region.shadow.spread) rgba(0, 0, 0, .15); } .footer-inner { padding: 10px $(main.padding.sides) 20px; } .footer-outer a { color: $(footer.link.color); } .footer-outer a:visited { color: $(footer.link.visited.color); } .footer-outer a:hover { color: $(footer.link.hover.color); } .footer-outer .widget h2 { color: $(footer.widget.title.text.color); } ]] <b:template-skin> <b:variable default='930px' name='content.width' type='length' value='930px'/> <b:variable default='0' name='main.column.left.width' type='length' value='180px'/> <b:variable default='360px' name='main.column.right.width' type='length' value='180px'/> <![CDATA[ body { min-width: $(content.width); } .content-outer, .region-inner { min-width: $(content.width); max-width: $(content.width); _width: $(content.width); } .main-inner .columns { padding-left: $(main.column.left.width); padding-right: $(main.column.right.width); } .main-inner .fauxcolumn-center-outer { left: $(main.column.left.width); right: $(main.column.right.width); /* IE6 does not respect left and right together */ _width: expression(this.parentNode.offsetWidth - parseInt("$(main.column.left.width)") - parseInt("$(main.column.right.width)") + 'px'); } .main-inner .fauxcolumn-left-outer { width: $(main.column.left.width); } .main-inner .fauxcolumn-right-outer { width: $(main.column.right.width); } .main-inner .column-left-outer { width: $(main.column.left.width); right: $(main.column.left.width); margin-right: -$(main.column.left.width); } .main-inner .column-right-outer { width: $(main.column.right.width); margin-right: -$(main.column.right.width); } #layout { min-width: 0; } #layout .content-outer { min-width: 0; width: 800px; } #layout .region-inner { min-width: 0; width: auto; } ]]> </b:template-skin> <div class='main-cap-bottom cap-bottom'> <div class='cap-left'/> <div class='cap-right'/> </div> </div> <footer> <div class='footer-outer'> <div class='footer-cap-top cap-top'> <div class='cap-left'/> <div class='cap-right'/> </div> <div class='fauxborder-left footer-fauxborder-left'> <div class='fauxborder-right footer-fauxborder-right'/> <div class='region-inner footer-inner'> <macro:include id='footer-sections' name='sections'> <macro:param default='2' name='num' value='3'/> <macro:param default='footer' name='idPrefix'/> <macro:param default='foot' name='class'/> <macro:param default='false' name='includeBottom'/> </macro:include> <!-- outside of the include in order to lock Attribution widget --> <b:section class='foot' id='footer-3' showaddelement='no'> document.body.className = document.body.className.replace('loading', ''); <macro:if cond='data:col.num &gt;= 2'> <table border='0' cellpadding='0' cellspacing='0' mexpr:class='&quot;section-columns columns-&quot; + data:col.num'> <tbody> <tr> <td class='first columns-cell'> <b:section mexpr:class='data:col.class' mexpr:id='data:col.idPrefix + &quot;-2-1&quot;'/> </td> <td class='columns-cell'> <b:section mexpr:class='data:col.class' mexpr:id='data:col.idPrefix + &quot;-2-2&quot;'/> </td> <macro:if cond='data:col.num &gt;= 3'> <td class='columns-cell'> <b:section mexpr:class='data:col.class' mexpr:id='data:col.idPrefix + &quot;-2-3&quot;'/> </td> </macro:if> <macro:if cond='data:col.num &gt;= 4'> <td class='columns-cell'> <b:section mexpr:class='data:col.class' mexpr:id='data:col.idPrefix + &quot;-2-4&quot;'/> </td> </macro:if> </tr> </tbody> </table> <macro:if cond='data:col.includeBottom'> <b:section mexpr:class='data:col.class' mexpr:id='data:col.idPrefix + &quot;-3&quot;' showaddelement='no'/> </macro:if> </macro

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  • Show #14 DotNetNuke 5.6.1, Razor/Webmatrix and WebCamps

    - by Chris Hammond
    Once again, it’s been far too long since the last show, this time just over 4 months, For Show #14 I am joined by Joe Brinkman. Take a listen and see what has been going on in the DNN world. Length: 47:56 Size: 43.8mb MP3 Download Welcome back to DNNVoice Welcome to guest Joe Brinkman ( http://blog.theaccidentalgeek.com/ ) Introduction to Joe and Welcome back from Chris Hammond ( http://www.chrishammond.com ) and what he's been doing DotNetNuke Training Free Extensions Module Development Templates...(read more)

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  • Adding Facebook Comments using Razor in DotNetNuke

    - by Chris Hammond
    The other day I posted on how to add the new Facebook Comments to your DotNetNuke website. This worked okay for basic modules that only had one content display, but for a module like DNNSimpleArticle this didn’t work well as the URLs for each article didn’t come across as individual URLs because of the way the Facebook code is formatted. When displaying the Comments I also only wanted to show them on individual articles, not on the main article listing. There is actually a pretty easy fix though...(read more)

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  • Invoke WCF rest service razor mvc 4

    - by Raj Esh
    I have been using jQuery to access my REST based wcf service which does not export the meta information. Using ajax, i could populate data into controls. I need guidance and directions as to how i can use these Rest service in my controller. I can't add Service reference to my MVC 4 project since my WCF rest does not to expose Metadata. Should i use UNITY? or any other DI frameworks?. Any sample would be of great help.

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  • Black or White Border/Shadow around PNGs in SDL/OPENGL

    - by Dylan
    having the same issue as this: Why do my sprites have a dark shadow/line/frame surrounding the texture? however, when I do the fix suggested there (changing GL_SRC_ALPHA to GL_ONE) it just replaces the black border with a white border on the images, and messes with my background color and some polygons I'm drawing (not all of them weirdly) by making them much lighter... any ideas? heres some of my relevant code. init: glMatrixMode(GL_PROJECTION); glLoadIdentity(); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glEnable(GL_DEPTH_TEST); glEnable(GL_MULTISAMPLE); glEnable(GL_TEXTURE_2D); glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); glAlphaFunc(GL_GREATER, 0.01); glEnable(GL_ALPHA_TEST); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glEnable(GL_BLEND); when each texture is loaded: glGenTextures(1, &textureID); glBindTexture(GL_TEXTURE_2D, textureID); gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, surface->w, surface->h, GL_BGRA, GL_UNSIGNED_BYTE, surface->pixels); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

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  • How to write regex in asp.net MVC 3 razor

    - by anirudha
    here is a small trick to write regex and exceptional code in MVC3. first trick is use @@ instead of @ it’s work don’ worry output goes @ not @@. second trick is that you can use <text></text> tag in MVC to use some code who give error because viewengine does not accept them. like var pattern = new RegExp(/^(("[\w-\s]+")|([\w-]+(?:\.[\w-]+)*)|("[\w-\s]+")([\w-]+(?:\.[\w-]+)*))(@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$)|(@\[?((25[0-5]\.|2[0-4][0-9]\.|1[0-9]{2}\.|[0-9]{1,2}\.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\.){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\]?$)/i);   this regex not work because it’s use @ so replace them to @@ e var pattern = new RegExp(/^(("[\w-\s]+")|([\w-]+(?:\.[\w-]+)*)|("[\w-\s]+")([\w-]+(?:\.[\w-]+)*))(@@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$)|(@@\[?((25[0-5]\.|2[0-4][0-9]\.|1[0-9]{2}\.|[0-9]{1,2}\.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\.){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\]?$)/i); now it will work. second way is that use text tag in MVC to make them work like <text> function isValidEmailAddress(emailAddress) { var pattern = new RegExp(/^(("[\w-\s]+")|([\w-]+(?:\.[\w-]+)*)|("[\w-\s]+")([\w-]+(?:\.[\w-]+)*))(@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$)|(@\[?((25[0-5]\.|2[0-4][0-9]\.|1[0-9]{2}\.|[0-9]{1,2}\.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\.){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\]?$)/i); return pattern.test(emailAddress); } </text>

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  • What is the `shadow` group used for?

    - by Shtééf
    On my Ubuntu 9.10 system, there's a shadow system group. There does not appear to be any user assigned to this group at all. The only files that I can find belonging to this group are /etc/shadow and /etc/gshadow. I'm aware that the purpose of these files is to store the passwords separately, out of reach from regular users who still might want to access passwd for other reasons. But what is the purpose of the shadow group? The reason I'm curious about this, is because I'm thinking about configuring nsswitch.conf to store it elsewhere, and would like to know if anything is actually trying to access the shadow database using shadow group credentials.

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  • Programmatically Setting Text Shadow Properties

    - by Ben Gribaudo
    Hello, PowerPoint has two kinds of shadows--shape and text. Shape shadows may be set by right-clicking on a shape (including a text box), choosing Format Text, then selecting Shadow or using VBA via the Shadow property on each shape: For Each Slide In ActivePresentation.Slides For Each Shape In Slide.Shapes Shape.Shadow.Size = 100 'etc Next Next How do I set text shadow's properties using VBA? In the UI, these may be accessed by right-clicking on text, choosing Format Text Effect, then selecting Shadow. I've done a bit of digging online and have been unable to find where these properties may be accessed via PowerPoint's VBA API. Thank you, Ben

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  • Shadow maps unable to properly project shadows in some situations?

    - by meds
    In the shadow map sample provided by Microsoft I've noticed an issue where shadows are not properly projected when thin geometry is projected at high angles, see here the shadows being projected, notice the poles from the lights are not projected: http://imgur.com/QwOBa.png And in this screenshot we see things from the lights perspective, not ethe poles are clearly visible: http://imgur.com/k2woZ.png So two questions really, is this an actual bug or a limitation with shadow mapping and if it's a bug how can I fix it? The source is directly from the Microsoft DirectX Sample Browser 'ShadowMap' sample from July 2004, the sample browser is the latest August 2009 one.

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  • Get/Post Controller Logic Best Practice

    - by Brian Mains
    In an ASP.NET MVC project (Razor), I have a Get request, which loads two properties on a model, dependent on the property passed into the action method. So if the parameter has a value, the Group property is supplied data. But if not, the Groups collection property is supplied data. In the post action method, when I process the data, to repopulate the view, I have to provide similar logic, and could getaway with returning Action(param) (the get response) to the caller. My question is, based on experience, is that a good practice to get into? I see some downsides to doing that, but adds the lack of code redundancy. Or is there a better alternative?

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  • jQuery CSS Property Monitoring Plug-in updated

    - by Rick Strahl
    A few weeks back I had talked about the need to watch properties of an object and be able to take action when certain values changed. The need for this arose out of wanting to build generic components that could 'attach' themselves to other objects. One example is a drop shadow - if I add a shadow behavior to an object I want the shadow to be pinned to that object so when that object moves I also want the shadow to move with it, or when the panel is hidden the shadow should hide with it - automatically without having to explicitly hook up monitoring code to the panel. For example, in my shadow plug-in I can now do something like this (where el is the element that has the shadow attached and sh is the shadow): if (!exists) // if shadow was created el.watch("left,top,width,height,display", function() { if (el.is(":visible")) $(this).shadow(opt); // redraw else sh.hide(); }, 100, "_shadowMove"); The code now monitors several properties and if any of them change the provided function is called. So when the target object is moved or hidden or resized the watcher function is called and the shadow can be redrawn or hidden in the case of visibility going away. So if you run any of the following code: $("#box") .shadow() .draggable({ handle: ".blockheader" }); // drag around the box - shadow should follow // hide the box - shadow should disappear with box setTimeout(function() { $("#box").hide(); }, 4000); // show the box - shadow should come back too setTimeout(function() { $("#box").show(); }, 8000); This can be very handy functionality when you're dealing with objects or operations that you need to track generically and there are no native events for them. For example, with a generic shadow object that attaches itself to any another element there's no way that I know of to track whether the object has been moved or hidden either via some UI operation (like dragging) or via code. While some UI operations like jQuery.ui.draggable would allow events to fire when the mouse is moved nothing of the sort exists if you modify locations in code. Even tracking the object in drag mode this is hardly generic behavior - a generic shadow implementation can't know when dragging is hooked up. So the watcher provides an alternative that basically gives an Observer like pattern that notifies you when something you're interested in changes. In the watcher hookup code (in the shadow() plugin) above  a check is made if the object is visible and if it is the shadow is redrawn. Otherwise the shadow is hidden. The first parameter is a list of CSS properties to be monitored followed by the function that is called. The function called receives this as the element that's been changed and receives two parameters: The array of watched objects with their current values, plus an index to the object that caused the change function to fire. How does it work When I wrote it about this last time I started out with a simple timer that would poll for changes at a fixed interval with setInterval(). A few folks commented that there are is a DOM API - DOMAttrmodified in Mozilla and propertychange in IE that allow notification whenever any property changes which is much more efficient and smooth than the setInterval approach I used previously. On browser that support these events (FireFox and IE basically - WebKit has the DOMAttrModified event but it doesn't appear to work) the shadow effect is instant - no 'drag behind' of the shadow. Running on a browser that doesn't support still uses setInterval() and the shadow movement is slightly delayed which looks sloppy. There are a few additional changes to this code - it also supports monitoring multiple CSS properties now so a single object can monitor a host of CSS properties rather than one object per property which is easier to work with. For display purposes position, bounds and visibility will be common properties that are to be watched. Here's what the new version looks like: $.fn.watch = function (props, func, interval, id) { /// <summary> /// Allows you to monitor changes in a specific /// CSS property of an element by polling the value. /// when the value changes a function is called. /// The function called is called in the context /// of the selected element (ie. this) /// </summary> /// <param name="prop" type="String">CSS Properties to watch sep. by commas</param> /// <param name="func" type="Function"> /// Function called when the value has changed. /// </param> /// <param name="interval" type="Number"> /// Optional interval for browsers that don't support DOMAttrModified or propertychange events. /// Determines the interval used for setInterval calls. /// </param> /// <param name="id" type="String">A unique ID that identifies this watch instance on this element</param> /// <returns type="jQuery" /> if (!interval) interval = 200; if (!id) id = "_watcher"; return this.each(function () { var _t = this; var el$ = $(this); var fnc = function () { __watcher.call(_t, id) }; var itId = null; var data = { id: id, props: props.split(","), func: func, vals: [props.split(",").length], fnc: fnc, origProps: props, interval: interval }; $.each(data.props, function (i) { data.vals[i] = el$.css(data.props[i]); }); el$.data(id, data); hookChange(el$, id, data.fnc); }); function hookChange(el$, id, fnc) { el$.each(function () { var el = $(this); if (typeof (el.get(0).onpropertychange) == "object") el.bind("propertychange." + id, fnc); else if ($.browser.mozilla) el.bind("DOMAttrModified." + id, fnc); else itId = setInterval(fnc, interval); }); } function __watcher(id) { var el$ = $(this); var w = el$.data(id); if (!w) return; var _t = this; if (!w.func) return; // must unbind or else unwanted recursion may occur el$.unwatch(id); var changed = false; var i = 0; for (i; i < w.props.length; i++) { var newVal = el$.css(w.props[i]); if (w.vals[i] != newVal) { w.vals[i] = newVal; changed = true; break; } } if (changed) w.func.call(_t, w, i); // rebind event hookChange(el$, id, w.fnc); } } $.fn.unwatch = function (id) { this.each(function () { var el = $(this); var fnc = el.data(id).fnc; try { if (typeof (this.onpropertychange) == "object") el.unbind("propertychange." + id, fnc); else if ($.browser.mozilla) el.unbind("DOMAttrModified." + id, fnc); else clearInterval(id); } // ignore if element was already unbound catch (e) { } }); return this; } There are basically two jQuery functions - watch and unwatch. jQuery.fn.watch(props,func,interval,id) Starts watching an element for changes in the properties specified. props The CSS properties that are to be watched for changes. If any of the specified properties changes the function specified in the second parameter is fired. func (watchData,index) The function fired in response to a changed property. Receives this as the element changed and object that represents the watched properties and their respective values. The first parameter is passed in this structure:    { id: itId, props: [], func: func, vals: [] }; A second parameter is the index of the changed property so data.props[i] or data.vals[i] gets the property value that has changed. interval The interval for setInterval() for those browsers that don't support property watching in the DOM. In milliseconds. id An optional id that identifies this watcher. Required only if multiple watchers might be hooked up to the same element. The default is _watcher if not specified. jQuery.fn.unwatch(id) Unhooks watching of the element by disconnecting the event handlers. id Optional watcher id that was specified in the call to watch. This value can be omitted to use the default value of _watcher. You can also grab the latest version of the  code for this plug-in as well as the shadow in the full library at: http://www.west-wind.com:8080/svn/jquery/trunk/jQueryControls/Resources/ww.jquery.js watcher has no other dependencies although it lives in this larger library. The shadow plug-in depends on watcher.© Rick Strahl, West Wind Technologies, 2005-2011

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  • In ASP.NET MVC (3.0/Razor), do you prefer multiple views, or conditionals within views? Why?

    - by Chad
    For my new web app, I'm debating on using multiple views, or conditionals within views. An example scenario would be showing different info to users who are authenticated vs non-authenticated. This could be handled a couple ways. In the controller, check IsAuthenticated and return a view based on that In the view, check IsAuthenticated and show blocks of info based on that Pros of multiple views: Smaller, less complicated view - next to no logic in the view Pros of single views: less view files to maintain The obvious cons are the opposites of the pros: more files to maintain or more complicated view files. Which do you prefer? Why? Any pros/cons I haven't outlined here? Update: Assume each view uses a layout page and partial views to abstract the obviously repetitive code.

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  • How do I post to a webservice and display the returned Response in MVC3 Razor Application?

    - by DavieDave
    I have need to call a webservice from an HTML helper extension I created (combinbation of Action and Image) and placed in the view as follows @Html.ActionImage("CallService", new { number = ViewBag.number, code = ViewBag.code, account = ViewBag.account, amount = ViewBag.amount }, "~/Content/sb_200x61.png", "Start the Process") I am making the action call and it calls the service and returns a string of the html response, but it doesn't look right. I am using the typical HttpWebRequest to do the POST Action in C# code. Here is the controller action code: public MvcHtmlString CallService(string number, string code, string account, decimal? amount) { string response = MyService.ServiceLayer.ClassName.callService(number, code, account, Convert.ToDecimal(amount); MvcHtmlString mstring = new MvcHtmlString(response); return mstring; } When it returns the string back it's looking like the all styling and js is removed. It that due to MvcHtmlString? Is there a better way to do this? Redirect somehow ?

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  • How to build MVC Views that work with polymorphic domain model design?

    - by Johann de Swardt
    This is more of a "how would you do it" type of question. The application I'm working on is an ASP.NET MVC4 app using Razor syntax. I've got a nice domain model which has a few polymorphic classes, awesome to work with in the code, but I have a few questions regarding the MVC front-end. Views are easy to build for normal classes, but when it comes to the polymorphic ones I'm stuck on deciding how to implement them. The one (ugly) option is to build a page which handles the base type (eg. IContract) and has a bunch of if statements to check if we passed in a IServiceContract or ISupplyContract instance. Not pretty and very nasty to maintain. The other option is to build a view for each of these IContract child classes, breaking DRY principles completely. Don't like doing this for obvious reasons. Another option (also not great) is to split the view into chunks with partials and build partial views for each of the child types that are loaded into the main view for the base type, then deciding to show or hide the partial in a single if statement in the partial. Also messy. I've also been thinking about building a master page with sections for the fields that only occur in subclasses and to build views for each subclass referencing the master page. This looks like the least problematic solution? It will allow for fairly simple maintenance and it doesn't involve code duplication. What are your thoughts? Am I missing something obvious that will make our lives easier? Suggestions?

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  • Storage server 2003 shadow copy backups deleted

    - by Aceth
    Hi there We have a 1TB storage server I've just gone to transfer a 100Gb file across to it. And it has deleted the shadow copy. From Googling I understand that this probably occurred: http://support.microsoft.com/kb/826936 Is there any way of recovering those shadow copies back? Thank you very much for having a read anyhow and any help would be greatly appreciated.

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  • DriveImage XML fails with a Windows Volume Shadow Service Error

    - by Ssvarc
    I'm trying to image a SATA laptop hard drive, using DriveImageXML, that is attached to my computer via a USB adapter. I'm running Win7 Ultimate 64 bit. DriveXML is returning: Could not initialize Windows Volume Shadow Service (VSS). ERROR C:\Program Files (x86)\Runtime Software\Drivelmage XML\vss64.exe failed to start. ERROR TIMEOUT Make sure VSSVC.EXE is running in your task manager. Click Help for more information. VSSVC.EXE is running in Task Manager, as is VSS64.exe. Looking at the FAQ on the Runtime webpage this turned up: Please verify in Settings-Control Panel-Administrative Tools-Services that the following services are enabled: MS Software Shadow Copy Provider Volume Shadow Copy Also make sure you are able to stop and start these services. Possible reasons for VSS failures: For VSS to work, at least one volume in your computer must be NTFS. If you use only FAT drives, VSS will not function. The required NTFS volume does not need to be identical with the volume you want to image. You should make sure that VSSVC.EXE is running in your task manager. If the problems persist, registering "oleaut.dll" and "oleaut32.dll" using "regsvr32" might help. Both of those services are running and can be started and stopped without issue. Using "regsvr32" to register ""oleaut32.dll" returns successful, but "oleaut.dll" returns: The module "oleaut.dll" failed to load. Make sure the binary is stored at the specified path or debug it to check for problems with the binary or dependent .DLL files. The specified module could not be found. Some other information that might be relevant. Browsing to the drive is successful, but accessing certain folders returns an "access" error. Windows runs a permissions adder that adds the current user profile to the NFTS permissions. Could this be the cause of the issue? DriveImage XML is running as Administrator. Thoughts?

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  • System State Backups using NTbackup fail with error 0x800423f4 (relating to volume shadow copy)

    - by Paul Zimmerman
    We have a Windows Server 2003 R2 running Service Pack 2. It is a domain controller (Global Catalog) and our main internal DNS server. We run a System State backup of the machine to back up Active Directory information and save the backup to a different server. This server has a single drive (C:), and we do have Shadow Copies enabled for the volume (which are completing successfully). The System State Backup is now failing with the following listed in the backup logs: Volume shadow copy creation: Attempt 1. "Event Log Writer" has reported an error 0x800423f4. This is part of System State. The backup cannot continue. Error returned while creating the volume shadow copy:800423f4 Aborting Backup. The operation did not successfully complete. When doing a vssadmin list writers, we sometimes get the following reported for the Event Log Writer (other times it says that it is in the state of "[1] Stable" with "No error"): Writer name: 'Event Log Writer' Writer Id: {eee8c692-67ed-4250-8d86-390603070d00} Writer Instance Id: {c7194e96-868a-49e5-ba99-89b61977753c} State: [8] Failed Last error: Retryable error We have tried disabling the event log service via the registry, rebooting, deleting the event log files from the drive, then re-enabling the service via the registry and rebooting, but this didn't seem to solve the issue. We also get an error message when in the event viewer when trying to open the log for the "File Replication Service" of "Unable to complete the operation on 'File Replication Service'. The security descriptor structure is invalid." I have searched the error via Google and tried a number of different things, but nothing has seemed to help. Any suggestions on what we might try to get the Event Log Writer to behave would be greatly appreciated!

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  • Drive XML returning Windows Volume Shadow Service Error

    - by Ssvarc
    I'm trying to image a SATA laptop hard drive, using DriveImageXML, that is attached to my computer via a USB adapter. I'm running Win7 Ultimate 64 bit. DriveXML is returning: Could not initialize Windows Volume Shadow Service (VSS). ERROR C:\Program Files (x86)\Runtime Software\Drivelmage XML\vss64.exe failed to start. ERROR TIMEOUT Make sure VSSVC.EXE is running in your task manager. Click Help for more information. VSSVC.EXE is running in Task Manager, as is VSS64.exe. Looking at the FAQ on the Runtime webpage this turned up: Please verify in Settings-Control Panel-Administrative Tools-Services that the following services are enabled: MS Software Shadow Copy Provider Volume Shadow Copy Also make sure you are able to stop and start these services. Possible reasons for VSS failures: For VSS to work, at least one volume in your computer must be NTFS. If you use only FAT drives, VSS will not function. The required NTFS volume does not need to be identical with the volume you want to image. You should make sure that VSSVC.EXE is running in your task manager. If the problems persist, registering "oleaut.dll" and "oleaut32.dll" using "regsvr32" might help. Both of those services are running and can be started and stopped without issue. Using "regsvr32" to register ""oleaut32.dll" returns successful, but "oleaut.dll" returns: The module "oleaut.dll" failed to load. Make sure the binary is stored at the specified path or debug it to check for problems with the binary or dependent .DLL files. The specified module could not be found. Some other information that might be relevant. Browsing to the drive is successful, but accessing certain folders returns an "access" error. Windows runs a permissions adder that adds the current user profile to the NFTS permissions. Could this be the cause of the issue? DriveImage XML is running as Administrator. Thoughts?

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  • Shadow-mapping xna

    - by Kurt Ricci
    I've been trying to implement shadows in my game and I've been following quite a few tutorials online, mainly Riemers, but I'm always getting the same 2 errors when I'm drawing my models and setting the parameters from the effect file. The errors are: This method does not accept null for this parameter. Parameter name: value and Object reference not set to an instance of an object. So I've then downloaded a sample and just replaced my model with the one found in the sample and the same errors occur. I this find very strange as it works with his model. I'm wondering if the problem is with my models (I made them myself). Here's the code where the errors occur (they start to occur after the second foreach loop). Any help would be greatly appreciated, thanks.

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  • BPM 11g and Human Workflow Shadow Rows by Adam Desjardin

    - by JuergenKress
    During the OFM Forum last week, there were a few discussions around the relationship between the Human Workflow (WF_TASK*) tables in the SOA_INFRA schema and BPMN processes.  It is important to know how these are related because it can have a performance impact.  We have seen this performance issue several times when BPMN processes are used to model high volume system integrations without knowing all of the implications of using BPMN in this pattern. Most people assume that BPMN instances and their related data are stored in the CUBE_*, DLV_*, and AUDIT_* tables in the same way that BPEL instances are stored, with additional data in the BPM_* tables as well.  The group of tables that is not usually considered though is the WF* tables that are used for Human Workflow.  The WFTASK table is used by all BPMN processes in order to support features such as process level comments and attachments, whether those features are currently used in the process or not. For a standard human task that is created from a BPMN process, the following data is stored in the WFTASK table: One row per human task that is created The COMPONENTTYPE = "Workflow" TASKDEFINITIONID = Human Task ID (partition/CompositeName!Version/TaskName) ACCESSKEY = NULL Read the complete article here. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Facebook Wiki

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  • DriveImage XML fails with a Windows Volume Shadow Service Error

    - by ssvarc
    I'm trying to image a SATA laptop hard drive, using DriveImageXML, that is attached to my computer via a USB adapter. I'm running Win7 Ultimate 64 bit. DriveXML is returning: Could not initialize Windows Volume Shadow Service (VSS). ERROR C:\Program Files (x86)\Runtime Software\Drivelmage XML\vss64.exe failed to start. ERROR TIMEOUT Make sure VSSVC.EXE is running in your task manager. Click Help for more information. VSSVC.EXE is running in Task Manager, as is VSS64.exe. Looking at the FAQ on the Runtime webpage this turned up: Please verify in Settings-Control Panel-Administrative Tools-Services that the following services are enabled: MS Software Shadow Copy Provider Volume Shadow Copy Also make sure you are able to stop and start these services. Possible reasons for VSS failures: For VSS to work, at least one volume in your computer must be NTFS. If you use only FAT drives, VSS will not function. The required NTFS volume does not need to be identical with the volume you want to image. You should make sure that VSSVC.EXE is running in your task manager. If the problems persist, registering "oleaut.dll" and "oleaut32.dll" using "regsvr32" might help. Both of those services are running and can be started and stopped without issue. Using "regsvr32" to register ""oleaut32.dll" returns successful, but "oleaut.dll" returns: The module "oleaut.dll" failed to load. Make sure the binary is stored at the specified path or debug it to check for problems with the binary or dependent .DLL files. The specified module could not be found. Some other information that might be relevant. Browsing to the drive is successful, but accessing certain folders returns an "access" error. Windows runs a permissions adder that adds the current user profile to the NFTS permissions. Could this be the cause of the issue? DriveImage XML is running as Administrator. Thoughts?

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  • Scripting an 'empty' password in /etc/shadow

    - by paddy
    I've written a script to add CVS and SVN users on a Linux server (Slackware 14.0). This script creates the user if necessary, and either copies the user's SSH key from an existing shell account or generates a new SSH key. Just to be clear, the accounts are specifically for SVN or CVS. So the entry in /home/${username}/.ssh/authorized_keys begins with (using CVS as an example): command="/usr/bin/cvs server",no-port-forwarding,no-agent-forwarding,no-X11-forwarding,no-pty ssh-rsa ....etc...etc...etc... Actual shell access will never be allowed for these users - they are purely there to provide access to our source repositories via SSH. My problem is that when I add a new user, they get an empty password in /etc/shadow by default. It looks like: paddycvs:!:15679:0:99999:7::: If I leave the shadow file as is (with the !), SSH authentication fails. To enable SSH, I must first run passwd for the new user and enter something. I have two issues with doing that. First, it requires user input which I can't allow in this script. Second, it potentially allows the user to login at the physical terminal (if they have physical access, which they might, and know the secret password -- okay, so that's unlikely). The way I normally prevent users from logging in is to set their shell to /bin/false, but if I do that then SSH doesn't work either! Does anyone have a suggestion for scripting this? Should I simply use sed or something and replace the relevant line in the shadow file with a preset encrypted secret password string? Or is there a better way? Cheers =)

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  • remove notification bar shadow in android app

    - by defrex
    In android, the notification bar at the top has a shadow most of the time. However, sometimes, such as when an app has it's title-bar showing, or in some other cases (such as in the twitter app or the market) that shadow effect is gone. My guess is that the shadow is supposed to be there when the content underneath can scroll. In my app, however, the content underneath can't scroll, and I think the shadow looks bad on the top part of my logo. Does anyone know how to disable it?

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