Answer Questions

• jkrakowsky Having a little trouble with XNA Spot tutorial...

  I have been doing the How to Draw a 2D Sprite tutorial from xnaspot.com,and I still have a lot to learn and I got all the info inputed and there is one error that I cannot figure out, and that is in the update funtion, I put what I was supposed to, and even tried pasting it, because I have been typing everything to get it down (I would be way past it if I just copied and pasted) and it seems like there should be a }, yet when I put that down it still says }expected, I tried removing it and 9 more errors popped up, so I need to know, what am I doing wrong I would greatly appreciatte any help you guys can give me. I figured it out using a better turorial from www.learnxna.com , but thanks for your help. Think of braces as a stack ...Show All

• Chris_Pearce Collision detection - Howto

  Hi all, I'm trying to make two objects collide in GSE, actually in a Pong game - between the bat and the ball. I have motion for both, but no collision, the ball just leaves the stage so to speak. Any help would be appreciated. I have looked in the Help, but to no avail. I have assigned a bounding box to the both bats and the ball, the ball reflects off of the second bat, but goes right through the first. For collision detection in the game I'm making right now I'm using a simple distance check as opposed to bounding boxes... It's not pixel perfect collision but if all you need is something quick and easy that works pretty good, here's the function. public double distance(int x1, int y1, int x2, int y2) { ...Show All

• Biocide Help Needed Collision Detection

  Hi, Everyone, Any help would be great, I am trying to replicate master of defense as a learning curve and i cannot figure out the collision detection. It needs to be able to fire continuisly and it will always hit if the army man if it is in a 250 radious area. I have a static tower firing at co-ordinates x = 250, y=0. I also have an army man running down from co-ordinate y 0 to 250. x= 0 I just cant figure how to make the bullet fire properly to kill the army man if he is in the 250 box area. example : if tower x= 0 and y = 0,, army man x = 0 and y = 250 he can be hit, if he is the other side army man is at x=500 and y = 250 he can be hit. I am trying to make a 250 pixel circle around the tower. Any ideas Thanks ...Show All

• shmulik_segal XNA Asteroids game in the Channel 9 XNA launch video

  Any idea if this is going to be released to the community It looks like it would be a blast to play. I'd ask about the font support that was shown too, but I'm guessing that'll come in the first patch.   Stephen Styrchak - MSFT wrote: (You may take that as a challenge if you like...) Wait until the dreambuildplay contest!       which we're all waiting anxiously to hear more about!   It's going to be a long week and a half until January! I'm with you Jim, that game looked badass! I think they said a few guys at Rare put it together. MS needs to convince them to release it. George Clingerman wrote: I was kidding of cou ...Show All

• MickDotNet Official List of Features and Limitations of the various Pixel Shader versions?

  Does anyone know of an official list of features and limitations for the different Vertex Shader and Pixel Shader versions (1.1, 2.0, 3.0, etc) I couldn't find anything on the Microsoft or nVidia web sites or on the web. I don't even know for sure who governs these standards. Wow, XBox 360 supports SM3.0 This is we-just-landed-on-the-moon impact news to me! Xbox is actually significantly better than SM 3.0. Worth noting that the Xbox360 XNA is using a custom version of SM3.0 so it has some differences (mainly for the better :) ) than the normal PC SM3.0 Deano I've been wanting to do instancing on the xbox. You can't do it l ...Show All

• ajcanable Vector maths methods...

  Following a long day of writing and debugging some nasty rigid body physics code, and feeling the pain of the maths library I have to use for this C++ work, I thought I'd take another look at the XNA maths code to see if the results would be more readable (as you might hope ;). ... But my quick look at the framework docs seems to show more deficiencies than in the code I have been using all day... 1/ There is no Point3 class. This is a real pain as libraries that don't distinguish points and vectors are a right pain - transforming a point by a 4x4 matrix will result in a different result to transforming a vector. (And I don't want to resort to coding every point/vector as a homogeneous coordinate either!). There appears to be a ...Show All

• nwonline How to disable driver anti-aliasing

  I need to preserve the exact colors (and thus, hard edges) when I read back the rendered image via an offscreen surface filled with GetRenderTargetData. There is an option in the control panel where the driver forces anti-aliasing for all applications. If I do not set the quality-performance slider correctly, I will get anti-aliasing. Is there a way (in code) to prevent that From my understanding, control panel settings is directly tuning driver's behaviour. Thus it is not possible for the application to decide or force something that will be overriden anyway by the driver. Reading back the exact output of the pixel shader can be used for many things: picking, arbitrairy computations ( www.gpgpu.o ...Show All

• NelG1 Please Add Non-Generic DrawUserPrimitives and DrawIndexedUserPrimitives methods.

  I posted this request in the Suggestion tool as well. Btw- where is the link to actually view the contents of the Bug reports, and Suggestions You'd think that would be handy from the connect.microsoft.com site, but I can't find it. Add the method: Device.DrawUserPrimitives(Type vertexType, PrimitiveType type, int count, Array vertexData); and a similar non-generic method for Indexed primitives. I have a rendering system that captures rendering calls, and retains the call information. Later on, it sorts all of the calls in order to minimize state changes before execution. This is a very commen scenario. IT IS VERY DIFFICULT to call generic methods (in a generic fashion) when you only know the vertex type, and have a un-typed array. For ...Show All

• Salvador Rocha C# Performance Problems

  Hi, I recognized, that my framerate is very bad in comparison with some C++ examples. After removing all "catchs" in the render-methods i got 100 FPS instead of 20. Exceptions seems to be really, really slow. Are there some other performace problems in C# which i have to have in mind Exceptions are very slow. When they are thrown. However the try/catch construct adds very little overhead by its self, of course even a little overhead adds up if you're processing 100's every render pass. What did your code look like But i think its not the main reason, why my terrain demo is so slow. I used a profiler (Ants is the best piece of software i have had in my hands fo ...Show All

• Thwack "The project type not supported by this installation"

  Any clues as to the cause of this error whenever I open templates It's probably because you upgraded to beta 2. I had a similar issue opening beta 1 project files. Thanks for the reply. Sorry for not explaining it fully, but it actually occurs both when I try to open a project, or create a new project from one of the provided templates. I've tried reinstalling several times too, but with no luck. :S Well I've tried reinstallling Visual C# and XNA Game Studio again but still with no luck. Has anyone else gotten the problem The documentation for XNA looks to be really promising but troubleshooting documentation is pretty limited at the moment, but that's understanda ...Show All

• Gidon Sela render a copy of the backbuffer

  Hello I have read several posts about that, but nothing seems to work for me, I try to save my backbuffer (to store it in a surface) then I would like to draw this saved surface... so, I need two things. 1: save my backbuffer MyBackBufferSurface=graphics.GraphicsDevice.GetBackBuffer(0,0); 2:render my backBuffer spriteRenderer.Draw(MyBackBufferTexture, new Rectangle (0, 0, 512, 512), Color .White); I used : MyBackBufferSurface= MyBackBuffertexture.GetSurfaceLevel(0); to assosiate my surface with my texture I end up with a black surface when I render my texutre please help me I on this since a week and it makes me crazy. thanx it seems to work better, b ...Show All

• da Vinci Error when trying to install XNA Build

  After I downloaded the XNA Build March 2006 CTP, I was brought to a page that showed me how to setup Microsoft Visual Studio 2005 Premier Partner Edition. I successfully installed Microsoft Windows Installer 3.1, Miscrosoft XML 6.0, and Microsof .NET Framework 2.0. After I did that I downloaded Vs_Setup.msi. I double clicked it and there was no visual activity on my computer. About a minute later a message came up that said, "Error 1311.Source File not found : C:\Documents and Settings\(My Name)\My Documents\_1519_RTL_x86_enu_VSCC_Help_Collection.cab. Verify that the file exists and that you can access it. The file did not exist and I could not access it. I have retried installing many times but the same thing happens. Help apprecia ...Show All

• ptenter Visual C++ : Going from 2D to 3D Drawings

  Hi,   I finished an application in Visual C++ 2005 which draws and manipulates different figures on screen using GDI+.  Now, I would like to go a step further and draw those same figures in 3D.  Is there any articles available on the subject   Where should I start   A couple weeks ago, I remember having read something on using DirectX library for this, or maybe something else related.  If it is the right step to take, does anyone have any infos on which library would be the best to use and how to use it   Any example Thanks in advance, Stephane Hi again Jonathan, Many thanks for your help. I just downloaded the SDK. About 500 Mb... I wil ...Show All

• BLiTZWiNG Extending the content pipeline for model loading...

  Hi, I'm sorry if this has been answered before, I've searched a bit and not really found anything too helpful. My basic question is how do you go about extending the model loading pipeline I found this example in the help files but it did not want to compile: [ContentProcessor] class ScalingModelProcessor : ModelProcessor { public override ModelContent Process( NodeContent input, ContentProcessorContext context) { MeshHelper.TransformScene(input, Matrix.CreateScale(10.0f)); return base.Process(input, context); } } I put this in the spacewar starter game, and got some errors like so: Error 2 The type or namespace name 'ModelProcessor' could not be found (are you missing a using directive or an assembly refer ...Show All

• AlexBB Direct3D mobile and Macromedia Flash

  Hi! Does anybody know if Flash 7 (mobile edition) takes advantage of MS Direct3d mobile to bust the performance in Flash apps We are testing an application on Win CE device and the performance of the flash app has been being really poor. We expected an improvement after installing Direct3D, but the performance was the same (poor). Any clue Thanks in advance There is no connection between Flash and mobile Direct3D. You should contact Abode for recommendations on improving performance of Flash-based applications on ...Show All