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  • How do you manage web navigation info in your application?

    - by Dave
    I’m building an application where different users will have different menu items available to them depending on what they’ve paid for. There will also be multiple levels to the menu hierarchy. What’s the best approach to this problem? I’m assuming I need a database table that represents the menu hierarchy, including the parent-child relationships of the nodes in the navigation as well as the sorting of the items. Then another table which I use to manage whether a user is authorized to access a particular item in that table. When I render the view, I’d reference the menus, and the access rights of the user to output the menu, and I’d also need a function to check that same authorization from each controller in case a user manually types in a URL of a controller they’re not supposed to have access to. Is this the right approach? Any suggestions for caching this to prevent the constant look-ups of this type of info? I’m open to any suggestions on how you may have approached this type of requirement.

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  • Any advice about how to make the design of an application.

    - by VansFannel
    Hello. I want to design an application and I don't know where to start. I know I can use UML to design the application, but I don't know the steps I must follow. I've started doing the UML class diagram, but I suppose, I'm been doing the database model, not the class model for the application. If I don't explain it well, tell me. Is there any tutorial about how to design an application? Thank you.

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  • multiple models in Rails with a shared interface

    - by dfondente
    I'm not sure of the best structure for a particular situation in Rails. We have several types of workshops. The administration of the workshops is the same regardless of workshop type, so the data for the workshops is in a single model. We collect feedback from participants about the workshops, and the questionnaire is different for each type of workshop. I want to access the feedback about the workshop from the workshop model, but the class of the associated model will depend on the type of workshop. If I was doing this in something other than Rails, I would set up an abstract class for WorkshopFeedback, and then have subclasses for each type of workshop: WorkshopFeedbackOne, WorkshopFeedbackTwo, WorkshopFeedbackThree. I'm unsure how to best handle this with Rails. I currently have: class Workshop < ActiveRecord::Base has_many :workshop_feedbacks end class Feedback < ActiveRecord::Base belongs_to :workshop has_many :feedback_ones has_many :feedback_twos has_many :feedback_threes end class FeedbackOne < ActiveRecord::Base belongs_to :feedback end class FeedbackTwo < ActiveRecord::Base belongs_to :feedback end class FeedbackThree < ActiveRecord::Base belongs_to :feedback end This doesn't seem like to the cleanest way to access the feedback from the workshop model, as accessing the correct feedback will require logic investigating the Workshop type and then choosing, for instance, @workshop.feedback.feedback_one. Is there a better way to handle this situation? Would it be better to use a polymorphic association for feedback? Or maybe using a Module or Mixin for the shared Feedback interface? Note: I am avoiding using Single Table Inheritance here because the FeedbackOne, FeedbackTwo, FeedbackThree models do not share much common data, so I would end up with a large sparsely populated table with STI.

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  • Database model for storing expressions and their occurrence in text

    - by lisak
    Hey, I'm doing a statistical research application. I need to store words according to 2 initial letters which is 676 combinations and each word has its number of occurrences (minimal, maximal, average) in text. I'm not sure how the model/schema should look like. There will be a lot of checking whether the keyword was already persisted. I appreciate your suggestions. Edit: I'll be using either mysql or postgresql + spring templates

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  • couchdb: one database per account vs all in one database w. a namespace / property

    - by thruflo
    I'm modelling a document generation system in couchdb. It semi-automates the production of proposal and presentation documents from managable document fragments. Much like, say, Basecamp, it breaks down very simply into self-contained data per 'account'. Each account has multiple users, projects, documents, etc. However, nothing should be shared between accounts. I can see two ways of doing this: one couchdb database per account use a namespace / property to identify the account It seems to me that the first approach is conceptually sound and potentially has security and partitioning advantages. However, it seems to me to restrict some cross-database data querying (that I don't have a use case for now but you never know...) and to make updating views potentially require an awful lot of writes. Does anyone experienced with this kind of decision have any advice?

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  • I need to model my Javascript application

    - by Totty
    Hy, I was looking for a software to model an application, because is becoming too big. Like this: Class - A Methods - a, b, c, d, e Class - B Methods - a, b, c, d, e This should be in graphical mode, Classes are some boxes, and the methods are in the box. Then I would like to be able to make a arrow from one method to another. Do you know some good software? thanks

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  • Recommend a basic 3D graphics card for HP ProLiant DL360 G5?

    - by arathorn
    We've got an HP ProLiant DL360 G5 running Windows Server 2008 R2 that needs a graphics card with 3D acceleration (the integrated ATI ES1000 graphics don't have this). This is an unfortunate requirement that we can't avoid, as it is required by S/W installed on the server that is beyond our control. Looks like the PCI-Express slots in the box are x8 (1 full and 1 low profile). We just need a basic card, as long as it has the 3D acceleration. Any recommendations?

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  • L'Internet en 3D arrivera d'ici 5 ans d'après Intel, est-ce le futur du web ?

    L'Internet en 3D arrivera d'ici 5 ans d'après Intel, est-ce le futur du web ? Sean Koehl travaille chez Intel en tant que "techno évangéliste". Il s'est réccemment exprimé au sujet du futur d'Internet, et il estime que le réseau "sera complètement différent d'ici 5 à 10 ans". Selon lui, notre manière d'interagir entre nous, et avec des appareils électroniques, va changer. Radicalement. Ainsi, il prédit l'émergence d'une technologie tri-dimensionnelle très réaliste dans 5 ans. Comme de plus en plus de gens autour du monde s'équipent avec des ordinateurs ou des smartphones et ont un accès à l'Internet. Sean explique qu'on commence seulement à exploiter toute cette puissance informatiq...

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  • Castor3D en version 0.6.1.0, le moteur de rendu 3D en C++ supporte désormais OpenGL 3.x et 4.x

    Présentation Ce moteur 3D a l'ambition d'être multi-plateformes et multi-renderer. Pour l'instant, seul le développement sous Windows est exploitable (je galère pour la création d'une fenêtre compatible OpenGL sous Linux). Seul le Renderer OpenGL est implémenté (je n'ai aucune connaissance en Direct3D). La reconnaissance des Shaders est implémentée, uniquement la partie GLSL pour l'instant, on verra un jour pour intégrer Cg. Pas encore de LOD ni de gestion OcTree pour l'instant, mais c'est prévu. Support de plusieurs formats de fichiers : Obj, 3DS, MD2, MD3, PLY. Le système d'animation a un squelette qu'il me faut compléter afin d'avoir une implémentation correcte d'un système d'animation avec ou sans squeleton (...

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  • Bing Maps intègre les plans des centres commerciaux, pour concurrencer les futurs magasins virtuels en 3D de Google Maps ?

    Bing Maps intègre les plans des centres commerciaux Pour concurrencer les futurs magasins virtuels en 3D des Google Maps ? Les cartes du moteur de recherche de Microsoft ? les Bing Maps ? s'enrichissent d'une nouvelle fonctionnalité. En plus des plans des rues d'une ville, le service propose d'intégrer les plans des magasins, ou plus exactement des centres commerciaux. Avez-vous déjà vécu l'expérience de ne pas savoir où se trouve le magasin dont vous avez besoin et que le plan du centre commercial ne se trouve nulle part ? C'est dans cet esprit que l'équipe de développement du service vient d'intégrer les cartes « mall directory » aux cartes Bing. Ces cartes...

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  • When modeling a virtual circuit board, what is the best design pattern to check for cycles?

    - by Wallace Brown
    To make it simple assume you have only AND and OR gates. Each has two inputs and one output. The output of two inputs can be used as an input for the next gate For example: A AND B - E C AND D - F E OR F - G Assuming an arbitrary number of gates, we want to check if the circuit ever connects back into itself at an earlier state? For example: E AND F - A This should be illegal since it creates an endless cycle. What design pattern would best be able to check for these cycles?

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  • For 2D games, is there any reason NOT to use a 3D API like Direct3D or OpenGL?

    - by Eric Palakovich Carr
    I've been out of hobby Game Development for quite a while now. Back when I did it, most people used Direct Draw to create 2D games. By the time I stopped people were saying OpenGL or Direct3D with an orthogonal projection is just the way to go. I'm thinking about getting back into creating 2D games, in particular on mobile phone but maybe on the XNA platform as well. To make something using OpenGL I'd have a (hopefullly) small learning curve to acclimate myself to 3D development. Is there any reason to skip that and instead work with a 2D framework where I just have a Width x Height frame buffer I need to fill with pixels?

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  • vector collision on polygon in 3d space detection/testing?

    - by LRFLEW
    In the 3d fps in java I'm working on, I need a bullet to be fired and to tell if it hit someone. All visual objects in the game are defined through OpenGL, so the object it can be colliding with can be any drawable polygon (although they will most likely be triangles and rectangles anyways). The bullet is not an object, but will be treated as a vector that instantaneously moves all the way across the map (like the snipper riffle in Halo). What's the best way to detect/test collisions with the polygon and the vector. I have access to OpenCL, however I have absolutely no experience with it. I am very early in the developmental stage, so if you think there's a better way of going about this, feel free to tell me (I barley have a player model to collide with anyways, so I'm flexible with it). Thanks

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  • how to modify shadow mapping in "3D Graphics with XNA Game Studio 4.0"?

    - by naprox
    So I've been following the tutorials from the book Sean James's "3D Graphics with XNA Game Studio 4.0", and have been doing fine until i reached the shadow mapping part. in this book it creates point lights with a Sphere model. my first Q is how to draw a directional Light with this frame work? secondly it can do shadow mapping just for one light, how can i do shadow mapping for all or parts of the lights in the game? i just want to know how to modify this codes to do the above tasks. I've followed tutorials on MSDN and some other sites and didn't got the answer. please help me, its so urgent. and if any one wants, the complete code is here: http://www.mediafire.com/?6ct11mc1g8f891h

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  • 3D touch "Minority Report" style interface - what platform gets me there the fastest?

    - by Ross Braden
    I'm working on a project that requires touch interface, though the use case is desktop more than mobile. Want to start out platform agnostic, not a mobile app. There will be gridwork type of 3D objects and diagraming being represented - think AutoCAD or Minority Report. Want to build a prototype that will have hooks into a database to represent the data. Any advice on what tools to use both for the design and the development of the functionality is greatly appreciated. Thanks!

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  • Why doesn't Unity 3D work on my HD3000 integrated graphics?

    - by Zatsugami
    So I got my new laptop recently. HP Envy 15 with switchable graphics card. I'm using both windows and ubuntu, but for ubuntu I need just Intel HD3000 for better battery live. I've installed fglrx-updates and fglrx-amdcccle-updates. The drivers seems to work for my ATI card. The problem is, Intel HD3000 does not support Unity 3D. Why? My older Intel GMA 4500 did this. lspci -nn | grep VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Whistler [AMD Radeon HD 6600M Series] [1002:6741] (rev ff)

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  • Flash 11 : Adobe lance un programme d'incubation pour les développeurs, la « vraie 3D » arrive dans Flash Player

    Flash 11 : Adobe lance un programme d'incubation Pour les développeurs, la « vraie 3D » arrive dans Flash Player La devise : « sortir tôt et sortir vite », si chère à Google, séduit de plus en plus. Après Mozilla, c'est au tour d'Adobe de s'essayer aux cycles de développement plus courts centrés sur les fonctionnalités, avec son nouveau programme d'incubation pour Flash Player et Air. Ce programme devrait permettre aux développeurs de tester et de donner leurs feed-backs sur les nouvelles fonctionnalités des technologies Adobe très tôt dans leurs cycles de développement (avant la bêta habituelle, donc). Première nouveauté annoncée de Flash 11 : Moleh...

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  • Un brevet de Microsoft révèle des travaux sur un casque et des lunettes de jeux compatibles 3D stéréoscopique pour Xbox

    Un brevet de Microsoft révèle des travaux sur un casque et des lunettes de jeux compatibles 3D stéréoscopique pour Xbox et autres dispositifs Microsoft travaillerait sur de nouveaux dispositifs de jeux pour sa console Xbox et les appareils mobiles. [IMG]http://rdonfack.developpez.com/images/microsoftgame.PNG[/IMG] Selon un dépôt de brevet daté de 2010 et qui a refait surface ces jours, la firme travaillerait depuis quelques années sur un casque de jeux pour la Xbox et des lunettes. Le casque et les lunettes disposent d'une paire de projecteurs qui permettent de visualiser des images à partir d'un smartphone, ordinateur ou autre périphérique. Les projecteurs...

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  • PureBasic 5.00 est sorti : support Cocoa et version 64 bits OS X, nouvel éditeur de fenêtres, et nombreuses fonctions 3D au menu

    La version 5.00 de PureBasic est sortie. On notera le support Cocoa et la version 64 bits pour OS X. Et un nouvel éditeur de fenêtres pour Windows, Linux et OS X. On trouve également la mise à jour des bibliothèques tierces, pas mal de bogues corrigés et bien sûr la bibliothèque 3D grandement améliorée. Voir la liste ci-dessous pour plus de détails. Cette version a nécessité une longue période de test d'après l'équipe de Fantaisie Software, qui travaille déjà sur la suivante. Les versions démos ne sont pas encore en ligne, mais cela ne saurait tarder. Pour ceux qui ont une licence, vous pouvez télécharger PureBasic 5.00 sur votre compte :

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  • Ubuntu 11.10 is falling back to Unity 2D. How to get back to Unity 3D?

    - by marcioAlmada
    It happened some minutes ago when I plugged my secondary monitor and my graphical interface simply crashed. So I had to restart my session. Since the crash Ubuntu insists to use Unity2D fall back instead of the default one. I used to plug the secondary monitor everyday when at home and nothing bad happened before. This 2D version of the GUI is ugly and has a lot of problems. How can I go back to Unity 3D GUI? update It seems somehow I lost my opengl support (driver issues). $ glxinfo name of display: :0.0 Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". Error: couldn't find RGB GLX visual or fbconfig Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". And: $ glxgears Xlib: extension "GLX" missing on display ":0.0". Error: couldn't get an RGB, Double-buffered visual How can I revert things and go back to the right driver?

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  • Drawing two orthogonal strings in 3d space in Android Canvas?

    - by hasanghaforian
    I want to draw two strings in canvas.First string must be rotated around Y axis,for example 45 degrees.Second string must be start at the end of first string and also it must be orthogonal to first string. This is my code: String text = "In the"; float textWidth = redPaint.measureText(text); Matrix m0 = new Matrix(); Matrix m1 = new Matrix(); Matrix m2 = new Matrix(); mCamera = new Camera(); canvas.setMatrix(null); canvas.save(); mCamera.rotateY(45); mCamera.getMatrix(m0); m0.preTranslate(-100, -100); m0.postTranslate(100, 100); canvas.setMatrix(m0); canvas.drawText(text, 100, 100, redPaint); mCamera = new Camera(); mCamera.rotateY(90); mCamera.getMatrix(m1); m1.preTranslate(-textWidth - 100, -100); m1.postTranslate(textWidth + 100, 100); m2.setConcat(m1, m0); canvas.setMatrix(m2); canvas.drawText(text, 100 + textWidth, 100, greenPaint); But in result,only first string(text with red font)is visible. How can I do drawing two orthogonal strings in 3d space?

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  • Arc text in iphone application

    - by Amit Battan
    Hi all I want to bend the text that of UILabel from corner. It just like appear as arc or as following link. http://picasaweb.google.com/lh/photo/kfBzK4R4IlvyHfVywUNd1A?feat=directlink please suggest me, from where i start. any documentation,link, sample code. thanks amit battan

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