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  • How can I simulate a rigid body bounced from a wall in 3D world?

    - by HyperGroups
    How can I simulate a rigid sword bounced from a wall and hit the ground (like in physical world)? I want to use this for a simple animation. I can detect the figure and the size of the sword (maybe needed in doing bounce). Rotation can be controlled by quaternions/matrix/euler angles. It should turn the head and do rotations and fly to the ground. How can I simulate this physical process? Maybe what I need is an equation and some parameters? I need these data, and would combine them into my movie file, I use Mathematica to do the thing that generate the movie file(If I have the data, I can also export it into a 3DSMax script for example).

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  • How to design brain games [on hold]

    - by samesky
    I will wonder if anybody has some information about designing games for brain improvement. Recently lumosity is into a gear. I guess they research a lot or have experts. But is there any other research paper that is publicly available for designing the brain games ? Any equation or data that can help? Or what characteristics a brain game should have ? I am getting interested on this and search internet a lot, but unfortunately I could not find the core structure of it. It will really a helpful for me if somebody can give some information. Thank you.

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  • Need explanation on theorem form the book [closed]

    - by Pradeep
    I need some explanation on amortization analysis with respect to analysis of algorithm. I need some more explanation on one of the theorem attached. Explanation needed: 1. How did the author derive at Mij is O (ij-ij-1)? 2. Need explanation for quoted from the book " because at most ij-ij-1 -1 elements have been added into the table since the clear operation Mij-1 or since the beginning of the series." 3. Also what does the summation equation mean? need some more thorough explanation and the essence of the theorem. Removed Attached is the scan copy of the page from the Book

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  • Try/Catch or test parameters

    - by Ondra Morský
    I was recently on a job interview and I was given a task to write simple method in C# to calculate when the trains meet. The code was simple mathematical equation. What I did was that I checked all the parameters on the beginning of the method to make sure, that the code will not fail. My question is: Is it better to check the parameters, or use try/catch? Here are my thoughts: Try/catch is shorter Try/catch will work always even if you forget about some condition Catch is slow in .NET Testing parameters is probably cleaner code (Exceptions should be exceptional) Testing parameters gives you more control over return values I would prefer testing parameters in methods longer than +/- 10 lines, but what do you think about using try/catch in simple methods just like this – i.e. return (a*b)/(c+d); There are many similar questions on stackexchnage, but I am interested in this particular scenario.

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  • Per fragment lighting with OpenGL 4.x tessellated model

    - by Finlaybob
    I'm experienced with OpenGL 3+. I'm dabbling with tessellation shaders and have now got to a point where I have a nicely tessellated teapot/plane demo (quick look here) As can be seen from the screenshots, the lighting is broken (though admittedly doesn't look too bad in the image) I've tried to add a normal map to the equation but it still doesn't come out right, I can calculate the normals, tangents and binormals per triangle in the geometry shader but still looks wrong. I think the question would be; How do I add per fragment lighting to a tessellated model? The teapot is 32 16-point patches, the plane is one single 16 point patch. The shaders are here, but they are a complete mess, so I don't blame anyone who cant make sense of them. But peruse at your leisure if you like. Also, if this question is more suited to be somewhere else i.e. Stack Overflow or the Programming stack please let me know.

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  • How can I compute the Big-O notation for a given piece of code?

    - by TheNew Rob Mullins
    So I just took a data structure midterm today and I was asked to determine the run time, in Big O notation, of the following nested loop: for (int i = 0; i < n-1; i++) { for(int j = 0; j < i; j++2) { //1 Statement } } I'm having trouble understanding the formula behind determining the run time. I thought that since the inner loop has 1 statement, and using the series equation of: (n * (n - 1)) / 2, I figured it to be: 1n * (n-1) / 2. Thus equaling (n^2 - 1) / 2. And so I generalized the runtime to be O(n^2 / 2). I'm not sure this is right though haha, was I supposed to divide my answer again by 2 since j is being upped in intervals of 2? Or is my answer completely off?

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  • Vector reflect problem

    - by xdevel2000
    I'm testing some vector reflection and I want to check what happens when a ball collides with a paddle. So if I have: Vector2 velocity = new Vector2(-5, 2); position_ball += velocity; if (position_ball.X < 10) { Vector2 v = new Vector2(1,0); // or Vector2.UnitX velocity = Vector2.Reflect(velocity, v); } then, correctly, velocity is (5,2) after Reflect, but if I do: if (position_ball.X < 10) { Vector2 v = new Vector2(1,1); velocity = Vector2.Reflect(velocity, v); } then velocity is (1,8) and not (5, -2) that is the solution of reflection equation R = V - 2 * (V . N) Why is that?

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  • processing gamestate with a window of commands across time?

    - by rook2pawn
    I have clients sending client updates at a 100ms intervals. i pool the command inputs and create a client command frame. the commands come into the server in these windows and i tag them across time as they come in. when i do a server tick i intend to process this list of commands i.e. [ {command:'duck',timestamp:350,player:'a'}, {command:'shoot',timestamp:395,player:'b'}, {command:'move', timestamp:410,player:'c'} {command:'cover',timestamp:420,player:'a'} ] how would i efficiently update the gamestate based on this list? the two solutions i see are 1) simulate time via direct equation to figure out how far everyone would move or change as if the real gameupdate was ticking on the worldtick..but then unforseen events that would normally trigger during real update would not get triggered such as powerups or collissions 2) prepare to run the worldupdate multiple times and figure out which commands get sent to which worldupdate. this seems better but a little more costly is there a canonical way to do this?

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  • Cannot boot Windows 7 after installing Ubuntu 13.04

    - by whowantsakookie
    So I boot up my computer after installing Ubuntu 13.04. Grub correctly shows me all available boot options and I am able to boot to Ubuntu. However, when I try to boot into Windows 7, grub hangs at a purple screen. I have an HP laptop. It came with all four primary partitions taken up by the Windows bootloader, the actual Windows partition, one called HP_TOOLS, and another for HP Restore. I was able to back up and delete HP_TOOLS and the recovery partition, and change my disk type from Dynamic to Basic (GParted doesn't recognize Dynamic drives). I then booted into a live session of Ubuntu and made two partitions with GParted: one large partition for storage space that I could use between the two operating systems (sda4), and another extended partition (sda3) which contained Ubuntu (sda6) and it's swap space (sda5). It currently looks like this: I'm not sure if the second paragraph is actually relevant, I just want you to know all the variables in the equation. Thank you in advance for helping this poor noob.

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  • Host a IWpfTextView in a custom tool for a Visual Studio Extension

    - by Adam Driscoll
    I'm trying to create a IWpfTextView and then put it into a custom tool window. I can create the view, read a file to populate the ITextBuffer and display the view into my tool. I cannot edit the code at all and the code is not syntax highlighted. What steps am I missing to make this a full fledged editor? Code: IComponentModel componentModel = (IComponentModel)GetGlobalService (typeof(SComponentModel)); var _textEditorFactoryService = componentModel.GetService<ITextEditorFactoryService>(); var _textBufferFactoryService = componentModel.GetService<ITextBufferFactoryService>(); var _contentTypeRegistryService = componentModel.GetService<IContentTypeRegistryService>(); TextReader reader = new StreamReader(fileName); var types = _contentTypeRegistryService.GetContentType("CSharp"); ITextBuffer textBuffer = _textBufferFactoryService.CreateTextBuffer(reader, types); var view = _textEditorFactoryService.CreateTextView(textBuffer); IWpfTextViewHost editor = _textEditorFactoryService.CreateTextViewHost(view, true);

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  • dinamically resizing row height in QTreeWidget/QTreeView during edinitg items

    - by serge
    Hi everyone, I have some problems with sizing row's height in QTreeWidget. I use QStyledItemDelegate with QPlainTextEdit. During editing text in QPlainTextEdit i check for changes with a help of: rect = self.blockBoundingRect(self.firstVisibleBlock()) and if text it's height changes i need row in QTreeWidget also resizing. But i don't know how to inform TreeWidget or a Delegate about changes, i even tried to initialize editor with index, that i could use in a future, but it suddenly changes: class MyEditor(QPlainTextEdit): def __init__(self, index = None, parent=None): super(MyEditor, self).__init__(parent) self.index = index self.connect(self, SIGNAL("textChanged()"), self.setHeight) def setHeight(self): if self.index: rect = self.blockBoundingRect(self.firstVisibleBlock()) self.resize(rect.width(), rect.height()) self.emit(SIGNAL("set_height"), QSize(rect.width(), rect.height()), self.index) How can i bound editor's size changes with TreeWidget? And one more thing, by default all items (cells) in TreeWidget have -1 or some big value as default width. I need whole text in cell to be visible, so how can i limit it only by visible range and expand it in height? Thank you in advance, Serge

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  • JPG segment length encoding

    - by Blorgbeard
    I'm trying to write some code to extract Exif information from a JPG. Exif is stored in the APP1 segment of a JPG file. According to the Exif spec, the format of the APP1 segment is supposed to start like this: FF E1 // APP1 segment marker nn nn // Length of segment 45 // 'E' 78 // 'x' 69 // 'i' 66 // 'f' And it goes until there is an FF followed by something other than FF or 00. Looking at a JPG in a hex editor, I can see FF E1 and the Exif string, but I'm having trouble decoding the length bytes. An example: In one jpg, my hex editor tells me the APP1 segment is 686 bytes long, but the length bytes are F7 C8. How should I use those bytes to come up with 686 decimal?

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  • Adding video and flash functionality to the Ajax Control Toolkit HTMLEditor

    - by Beerdude26
    Greetings, I'm looking for a way to extend the functionality of the HTMLEditor control that the Ajax Control Toolkit supplies for ASP.net. I would like to add video and flash functionality to the editor (buttons, allowed tags, etc). To my knowledge, this is rather easy: plop in an tag with the correct parameters and it just works; I have videos running in the preview window of the editor. Unfortunately, the tag is stripped away when saving the HTML-code and updating it in the database. Hence, I would like to ask if there is any way of adding this functionality apart from manually adding the changes in the source control repository of the Ajax Control Toolkit and recompiling it. If this is not possible, but can offer some help concerning the implementation of this in the source code, it would also be much appreciated. Thank you for your time :)

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  • Drag/Drop image url in IE

    - by pierre
    I have a requirement in our web app. to allow users to drag an image from an external site and drop it in a text editor they have open in our app. This is, as you'd expect, to let them embed the image in the document (its a rich text editor). In IE 8 this functionality appears to be broken. If I drag/drop, IE uses a relative URL for the 'src' tag on the image - which means I cannot then download the file and store it since I dont know the full address (eg: '../../imgs/myImage.png') Safari and Firefox do not do this; they provides the fully-qualified address (eg: www.mysite.com/imgs/myImage.png). Is this a bug in IE or just WebKit/Mozilla going the extra mile?

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  • .net activeX object

    - by Ali YILDIRIM
    Hi, I am trying to use my .net image editor user control as an activeX object in a web form. After internet search, I created a asp.net web site from VS2008 and added the following code <object classid="res/ImageEditor.dll#ImageEditor.Editor" height="400" width="400" id="myControl1" name="myControl1" > </object> <INPUT id="Button1" type="button" value="Btn" name="Btn" onclick="return Button1_onclick()"> </script> <script language=javascript> function Button1_onclick() { alert(document.getElementById("myControl1").WatermarkText); } </script> I have two problems 1-) When i first create the project i see the user control on browser but, after rebuilding the user control and changing the dll file at web site, the object no more appears on browser. Instead i see something like an error image. 2-) i can not access public properties. The user control is marked as "make com visible", and register for com is checked at properties.

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  • HTML ENCODE & DECODE

    - by Zerotoinfinite
    Hi All, I am looking for a HTML editor, and I found many links through google like this http://online-html-editor.org/ Now I have written something on it: Let say the below content Heading The'la;skdlajlsdjansdkahskdkhaksdhkhaskdhkhaskhdkashdkhaksda asdljalsjdljalsdjljalsdjljalsdjljalsdlajs;fl'ajduyasdahsldjkagsdhasvdjyhlasjdgklastgians,dkasjdlhakhsdl amsdka;sdlyasdalshdlj,asdh,asdjg,absdlasd/.malskdla'slduljds,vaskkd;jas;dl'asldu'alsdaskd;lk'as;d 'a sd;jasldj;asdaklsdka'sld'sai'dkabskdm;;lsidaasfhdlasjd;ljaspodi;ajsd;lka'sld ' ad' a;fj;ljas;dfjalshdoiauslkfdnkasfnlka's;dkap[sd'alsd;jlaksfdkajsdfh;alsd; asdkasjd;kaskd;as;dk;aksd;ajsdlkjalksjdlasjdkgasfkjashdjashdkasfdkjashkdasdjo[uipuhlkasdjlkajsdljalsjdlkajsdljaljsdljalsjdlkaslkjdlkasdjlasjdlkjaslkdjlasjdlasudqpeohw09iqwpekjqwehlj bool tt = new bool(); if (txtStatus.Text == "true") tt = true; else tt = false; Now I want to save this content into the database and display as a normal text on a page. While extracting I can use Server.HTMLDecode, but I am facing problem while inserting this html data which I have copied from the sites. Please help. Thanks in advance.

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  • Get the string representation of a jquery DOM object's entire HTML

    - by Scozzard
    Hi, I have had a bit of a look around and am having some difficulty solving a wee issue I am having. I basically have a string of HTML, I convert that to a JQuery DOM object so that I can easily remove all elements that have a certain class using JQuery's .remove(). I.e., var radHtml = editor.get_html(); var jqDom = $(radHtml); $(".thickbox", jqDom).remove(); $(".thickboxcontent", jqDom).remove(); editor.set_html(this.innerHTML); NOTE: The HTML is derived from content in a RADEditor text editor so there are no parent HTML tags, so can look as follows: <p>This is a header</p> <p>this is some content followed by a table </p> <a href="#TB_inline?height=350&amp;width=400&amp;inlineId=myOnPageContent0" class="thickbox">Test Thickbox</a> <div id="myOnPageContent0" class="thickboxcontent"> <table class="modal"> <thead> </thead> <tbody> <tr> <td>item</td> <td>result</td> </tr> <tr> <td>item 1</td> <td>1</td> </tr> <tr> <td>item 2</td> <td>2</td> </tr> <tr> <td>item 3</td> <td>3</td> </tr> </tbody> </table> </div> Here is what the jqDom.html() returns from the HTML above: "This is a header" I was wondering if there was an easy way to do this - have some html and remove all elements (in this case divs) that have a certain class (but leaving their contents). JQuery doesnt have to used, but I would like to. Manipulating the DOM object is fine - it is getting the full DOM object in its entirety as a string that I am having the problem with. Any help would be much appreicated. Thanks.

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  • Visual Studio HTML Cursor-within-HTML-Element Syntax-highlighting color

    - by David Murdoch
    I can't, for the life of me, figure out how to change grey highlight color in the screenshot below to something that will make the text a little more legible. Does anyone know what the "Display Item" name is that I need to change? To get to the "theme editor" select Tools = Options = Environment = Fonts and Colors. I can't find what to edit. I've also looked through Tools = Options = Text Editor = HTML = Formatting to no avail. In case you are wondering the theme is a slightly modified Coding Instinct Theme

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  • How to store data which contents the quotes in mysql

    - by Nitz
    Hey Guys, i have one problem. In one of my form i have use rich text editor from the yahoo. now i want to store the data from that text area to mysql database. bcz user can enter anything in that textarea. as example user can enter many double quotes, or single quotes. so i need to store that data which may content many double quotes or many single quotes, so how to do that? normally we store by adding that data in one variable and then put that in sql then fire. but now variable contents many quotes and now i have problem to store. i can't remove that quotes bcz of my style which is generated by rich text editor. So how can store that data without affecting my styles of data.

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  • Capture window close event

    - by -providergordienko.vladimir
    I want to capture events that close editor window (tab) in Visual Studio 2008 IDE. When I use dte2.Application.Events.get_CommandEvents(null, 0).BeforeExecute I successfully captured such events: File.Close File.CloseAllButThis File.Exit Window.CloseDocumentWindow and others. If code in window is not acceptable, I stop the event (CancelDefault = true). But if I click "X" button on the right hand side, "Save Changes"; dialog appears, tab with editor window close and I have no any captured events. In this case I can capture WindowClosing event, but can not cancel the event. Is it poosible to handle "x" button click and stop event?

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  • Sortable_element with RJS does not working

    - by jaycode
    I have a list of images where user can arrange their orders. When user uploaded an image, I want the list to still be sortable. I am using a similar upload that was described here: http://kpumuk.info/ruby-on-rails/in-place-file-upload-with-ruby-on-rails/ Please help. Here are the code for upload in view file: <% form_for [:admin, @new_image], :html => { :target => 'upload_frame', :multipart => true } do |f| %> <%= hidden_field_tag :update, 'product_images'%> <%= f.hidden_field :image_owner_id %> <%= f.hidden_field :image_owner_type %> <%= f.file_field :image_file %><br /> or get image from this URL: <%= f.text_field :image_file_url %> <%= f.hidden_field :image_file_temp %><br /> <%= f.submit "Upload Image" %> <% end %> And in controller view: def create @image = Image.new(params[:image]) logger.debug "params are #{params.inspect}" if @image.save logger.debug "initiating javascript now" responds_to_parent do render :update do |page| logger.debug "javascript test #{sortable_element("product_images", :url => sort_admin_images_path, :handle => "handle", :constraint => false)}" page << "show_notification('Image Uploaded');" page.replace_html params[:update], :partial => '/admin/shared/editor/images', :locals => {:object => @image.image_owner, :updated_image => @image} page << sortable_element("product_images", :url => sort_admin_images_path, :handle => "handle", :constraint => false) end end #render :partial => '/admin/shared/editor/images', :locals => {:object => @image.image_owner, :updated_image => @image} else responds_to_parent do render :update do |page| page << "show_notification('Image Upload Error');" end end end end Or, to rephrase the question: Running this: page.replace_html params[:update], :partial => '/admin/shared/editor/images', :locals => {:object => @image.image_owner, :updated_image => @image} page << sortable_element("product_images", :url => sort_admin_images_path, :handle => "handle", :constraint => false) Will NOT adding sortable list feature. Please help, Thank you

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  • convert ArrayList.toString() back to ArrayList in one call

    - by dotnetnewbie
    I have a toString() representation of an ArrayList. Copying the toString() value to clipboard, I want to copy it back into my IDE editor, and create the ArrayList instance in one line. In fact, what I'm really doing is this: my ArrayList.toString() has data I need to setup a unit test. I want to copy this ArrayList.toString() into my editor to build a test against this edge case I don't want to parse anything by hand My input looks like this: [15.82, 15.870000000000001, 15.92, 16.32, 16.32, 16.32, 16.32, 17.05, 17.05, 17.05, 17.05, 18.29, 18.29, 19.16] The following do not work: Arrays.asList() google collections Lists.newArrayList() Suggestions?

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  • Eclipse plugin: content assist working in Galileo, not Ganymede

    - by erwan
    Hi, I am writing a custom editor in a plugin, and I developed it in Galileo. Now I'm trying to run it in Ganymede, but content assist doesn't work. There is no error, just nothing happens when I type "ctrl+space". The way I'm doing it is by providing a custom Configuration class that extends SourceViewerConfiguration, overriding public IContentAssistant getContentAssistant(ISourceViewer sourceViewer). The method gets called when the editor is created but there is no content assist. Was there any change from Ganymede to Galileo that I should be aware of?

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  • Wordpress plugin for enhanced WYSIWYG image resizing?

    - by Gnee
    Really, really trying to find a plugin that gives adds functionality to the image-resize functions in Wordpress's WYSIWYG editor. Something where the use of 'Gallery' is not mandatory – just an upload straight from the post editor. In a post, when an image is linked to from another site, there are less options – unlike when an image is uploaded. • You can resize, but it's 100%, 110%, 120%, 130% ....Instead of thumbnail, large, medium, etc, when you upload. •These dimension rarely match the dimensions needed. I know you can type in the W x H in the advanced tab, but my quest to find a better solution is really for the clients using the site. If anyone knows a solution / plugin / modification for this, I'd love to hear it!!

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  • Doxygen, too heavy to maintain ?

    - by Phong
    I am currently starting using doxygen to document my source code. I have notice that the syntax is very heavy, every time I modify the source code, I also need to change the comment and I really have the impression to pass too much time modifying the comment for every change I make in the source code. Do you have some tips to document my source code efficiently ? Does some editor (or plugin for existing editor) for doxygen to do the following exist? automatically track unsynchronized code/comment and warn the programmer about it. automatically add doxygen comment format (template with parameter name in it for example) in the source code (template) for every new item PS: I am working on a C/C++ project.

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