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• How to determine which cells in a grid intersect with a given triangle?

  - by Ray Dey

  I'm currently writing a 2D AI simulation, but I'm not completely certain how to check whether the position of an agent is within the field of view of another. Currently, my world partitioning is simple cell-space partitioning (a grid). I want to use a triangle to represent the field of view, but how can I calculate the cells that intersect with…

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• Is it wrong to use a boolean parameter to determine behavior?

  - by Ray

  I have seen a practice from time to time that "feels" wrong, but I can't quite articulate what is wrong about it. Or maybe it's just my prejudice. Here goes: A developer defines a method with a boolean as one of its parameters, and that method calls another, and so on, and eventually that boolean is used, solely to determine whether or not to…

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• Unable to start ubuntu

  - by Ray

  Need your help here: I'm unable to start Wbuntu in my laptop. I'm sharing ubuntu with Windows 7 in my laptop, and after I install Ubuntu when I boot my laptop and choose ubuntu as my operating system the following error appears: Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: …

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• Desktop empty under Ubuntu 12.04

  - by Ray

  My problem is that my desktop is empty -- there are no files or directories in it. The launcher on the left and the menu at the top are both ok. But, after a recent upgrade from 12.04 to 12.10, everything in my Desktop was emptied. I do have files in my ~/Desktop directory, which is what I want displayed. In ~/.config/user-dirs.dirs, I…

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• A rocket following the tracks height. Not Homing Missile.

  - by confusedEj

  What I am trying to create is a rocket that will hug the track in a straight direction. ie) The rocket travels in a straight direction and can orientate based on its local x axis. This is so it can go up/down ramps and never hit the ground. Currently I am using PhysX opengl and C++. This is the method I'm trying right now: 1. Ray cast…

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• Can a stylesheet for handhelds skip loading images

  - by Yeoh Ray Mond

  I have a stylesheet for desktops, and another for handhelds. The web page displays some images when displayed on the desktop, but hides those images when displayed on handhelds. The page appears as designed for both desktops and handhelds. When I check the server logs, I find that the handheld is actually still loading the images,…

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• Ambient occlusion shader just shows models as all white

  - by dvds414

  Okay so I have this shader for ambient occlusion. It loads to world correctly, but it just shows all the models as being white. I do not know why. I am just running the shader while the model is rendering, is that correct? or do I need to make a render target or something? If so then how? I'm using C++. Here is my shader: float…

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• Triangle Line-Segment Intersection - detecting near misses

  - by Will

  A ray is a very poor approximation of a player! I think approximating a player with a sphere traveling a straight line each game tick will solve my problems of the player intersecting edges of scenery because their line segment missed it yet their own model is not infinitely thin... I have a 3D triangle and a line segment. I…

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• HLSL Shader not working right?

  - by dvds414

  Okay so I have this shader for ambient occlusion. It loads to world correctly, but it just shows all the models as being white. I do not know why. I am just running the shader while the model is rendering, is that correct? or do I need to make a render target or something? if so then how? I'm using C++. Here is my shader. …

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• Querying the Datastore in python

  - by Ray

  Greetings! I am trying to work with a single column in the datatstore, I can view and display the contents, like this - q = test.all() q.filter("adjclose =", "adjclose") q = db.GqlQuery("SELECT * FROM test") results = q.fetch(5) for p in results: p1 = p.adjclose print "The value is --> %f" %…

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• SQL Server CE - Internal error: Cannot open the shared memory region

  - by blu

  I have a SQL Server CE database that works fine in dev, but when installed on the client has an issue. The SQL Server CE 3.5 dependencies are copied as part of the deployment. The target machine is a clean Windows 7 32-bit Ultimate image. The message for the exception in the event log is: Internal…

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• SQL Server CE, Visual Studio 2008/2010 RC, and Linq-to-Sql

  - by blu

  I added an .sdf to my project, added a table, added a Linq-to-Sql dmbl, and tried to add the table to the dbml. The result was an error: "The selected object(s) are an unsupported data provider" This happens in both VS 2008 Professional SP1 and 2010 RC Ultimate. I found someone talking about using…

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• C# - Cast object to IList<T> based on Type

  - by blu

  I am trying out a little reflection and have a question on how the cast the result object to an IList. Here is the reflection: private void LoadBars(Type barType) { // foo has a method that returns bars Type foo = typeof(Foo); MethodInfo method = foo.GetMethod("GetBars") …

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• Digital Signature Device Recommendations (Mini Tablet)

  - by blu

  I'd like to capture signatures of application users with a mini-tablet/little pos signature device. I welcome any first hand experiences of which ones were good and which ones to stay away from. Off the top of my head I can think of a few features I'd like to see: USB interface Not too…

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• Trigger element's onclick method with JQuery [ASP.NET]

  - by blu

  I have an ASP.NET server control that inherits from CheckBoxList that renders the controls with a UL and LIs. The control is set to AutoPostBack. Markup: <div id="foo"> <ul> <li> <input type="checkbox" …

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• Windows Forms Event Log

  - by blu

  I am writing to the event log from my Windows Forms application running on Windows 7 and am getting this message in the event log: The description for Event ID X from source Application cannot be found. Either the component that raises this event is not installed on…

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• Mocking View with RhinoMocks

  - by blu

  We are using MVP (Supervising Controller) for ASP.NET WebForms with 3.5 SP1. What is the preferred way to check the value of a view property that only has the a set operation with RhinoMocks? Here is what we have so far: var service =…

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• ASP.NET Call Another Element's DoPostBack Function

  - by blu

  I have an ASP.NET control that has an onclick event handler rendered inline on the element. I would like to call that function and have it raise the target control's server side event handler. <asp:CheckBox ID="Foo" …

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• C# LINQ Where Predicate Type Arguments

  - by blu

  I have an XElement with values for mock data. I have an expression to query the xml: Expression<Func<XElement, bool>> simpleXmlFunction = b => int.Parse(b.Element("FooId").Value) == 12; used in: var…

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• Visual Studio Setup Project Installer Prerequisite for SQL Server CE

  - by blu

  I have a Setup Project in my solution in Visual Studio 2008 SP1. The application installs fine but it is not loading my prerequisite of SQL Server CE. I have the following configurations set: Do I need to do anything…

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• Windows Forms - Report Designer

  - by blu

  Are there solutions available for allowing users to define report layouts within a WinForms app? We are playing with xml, xslt, and Word have some ok results, but are wondering if there are better options. We would like…

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• How should I port this Prototype to JQuery?

  - by blu

  There is currently this Prototype code that does a PUT: new Ajax.Request(someUrl, { method: 'put', parameters: { 'foo': bar }, onSuccess: function(response) { } .bind(this) }); I found this post but the…

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• .NET Application with SQL Server CE Database

  - by blu

  I just started using SQL Server CE 3.5 in my WinForms Application (C# in VS 2008 SP1). I've noticed a couple of interesting things I'd like some input on: 1. Copying of sdf file to bin My sdf file is located…

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• How can I have multiple navigation paths with Django, like a simplifies wizard path and a full path?

  - by Zeta

  Lets say I have an application with a structure such as: System set date set name set something Other set death ray target calibrate and I want to have "back" and "next" buttons on a page. The catch…

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• Suggestions on Working with this Inherited Generic Method

  - by blu

  We have inherited a project that is a wrapper around a section of the core business model. There is one method that takes a generic, finds items matching that type from a member and then returns a list of that…

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