pspballer07
How do you find out how long, wide, and deep a model is Like width would be the farthest right vertice subract the farthest left vertice. I need to know for collision
Getting the Model width and height
XNA Game Studio Express
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- Space Dust And Particles Whatever you do, just make sure that you pull our dust sprites/billboards/whatever from a pool of existing ones. that way, as you move along ... particles that move offscreen can simply be repositioned ahead of your craft. This will avoid adding additional GC pressure. edit: and oh yeah ... I think creating each particle individually will give you the best effect visually. but depending on your aesthetic target, perhaps you could get away with larger textures (with transparent backgrounds) of space junk, then layering them on top of each other to create a sense of parallax. Tag: Getting the Model width and height
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- Poor XNA performance or my poor code... or normal? Well, a few thoughts... - You should not be executing the following two lines on every frame: Matrix[] transforms = new Matrix[CubeMesh.Model.Bones.Count]; CubeMesh.Model.CopyAbsoluteBoneTransformsTo(transforms); Since you are saying that these are simple cubes, they probably don't have bones anyway. You can probably just use Matrix.Identity in place of transforms[mesh.ParentBone.Index] in the world matrix. In either case, it also appears that applying Matrix.Identity after the scaling matrix may be unnecessary. You may be able to remove it. - Also, if the projection and view matrices are not changing, there is no need to re-assign them on every frame. - You might see some benefit by working with the X and Y rotation angles purely as radians without having to call the MathHelper.ToRadians() method. There are two pi radians in a circle. - For any cube that doesn't have a change to its world matrix between frames, you could precompute and store the world matrix rather than rebuilding the matrix redundantly on every frame. Also, even if the position or rotation changes between frames, you could still precompute the parts of the world matrix that don't change, such as the Matrix.Identity * Matrix.CreateScale() portion. - You should also call all of the following lines once instead of every frame: effect.DirectionalLight0.Direction = new Vector3(0.0f, -1.0f, -0.4f); effect.DirectionalLight0.Enabled = true; effect.DirectionalLight0.DiffuseColor = new Vector3(1.0f, 1.0f, 1.0f); effect.LightingEnabled = true; effect.AmbientLightColor = new Vector3(0.2f, 0.2f, 0.2f); effect.DiffuseColor = cube.Color.ToVector3(); Tag: Getting the Model width and height
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- 2D Pixel Perfect Collision Ziggyware has some pretty good tutorials that do a pretty good job of getting you started. I've also found this site to be pretty useful in figuring out how to implement it myself. I'm working on my own set of tutorials for my site for this, but with the holidays and an upcoming trip , not sure when I'll actually have them done. I'm trying to provide another example that takes into account when you need to compare collisions between sprites cut from the same texture sheet. Hope that helps get you started. Tag: Getting the Model width and height
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- (Clip) Plane transform? You should calculate the world space plane from your vertices (using your model's local->world transformation matrix, which is what you seem to already be doing) and then transform the coefficients of that plane by the inverse transpose world*view*proj matrix. (The world matrix in this case is an additional, optional, world transformation, not your model's world matrix) You will end up with code that looks something like this: //It's assumed there's a plane instance called worldClipPlane and a Matrix called worldViewProjection that takes world space coordinates to projective space coordinates. If you don't do anything with your world coordinates (like flip them for doing reflections), then worldViewProjection is the same as view*projection Matrix planeProjectionMatrix = Matrix.Transpose(Matrix.Invert(worldViewProjection)); Vector4 worldClipPlaneCoefficients = new Vector4(worldClipPlane.Normal.X, worldClipPlane.Normal.Y, worldClipPlane.Normal.Z, worldClipPlane.D); Vector4 projectedPlaneCoefficients = Vector4.Transform(worldClipPlaneCoefficients, planeProjectionMatrix); projectedPlaneCoefficients.Normalize(); graphicsDevice.ClipPlanes[0].Plane = new Plane(projectedPlaneCoefficients); graphicsDevice.ClipPlanes[0].IsEnabled = true; This code is adapted from my 3DS Viewer project , which I use to render reflections. You can find the usage in the DrawMirrors() method in Scene.cs. Tag: Getting the Model width and height
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- Dream Build Play Contest Question - Using languages other than C# From the DreamBuildPlay site: Build an original game for Windows or Xbox 360 * using XNA Game Studio Express , a new tool from MicrosoftR. This pretty much means you'll have to use C#, as far as I can tell Tag: Getting the Model width and height
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- Xbox 360 D-pad issues Not using the controller driver, as it doesn't work exactly like the D-pad as you've seen. You'll probably have to use XInput and code specifically for whatever you're doing. Tag: Getting the Model width and height
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- [XNA] different textures on different polygons You need to issue a separate draw call for each different texture you want to use: SetTexture(firstTexture); DrawSomeStuff(); SetTexture(anotherTexture); DrawSomeOtherStuff(); You can still store all your geometry into a single vertex buffer and index buffer if you want to, but you'll have to also store what region of those buffers are used for each texture, so you specify just the appropriate set of triangles for each draw call. If you use the XNA Model class, this is what the ModelMeshPart type is for: it stores a collection of those, one per texture, which hold offset and count variables describing where in the shared vertex buffer each ModelMeshPart should draw. Tag: Getting the Model width and height
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- Compile in Release If you open any DirectX SDK sample project, can you choose the configuration or not Tag: Getting the Model width and height
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- Model Exporting From Maya (.fbx) I wouldn't really agree that FBX is flakey: we've been testing the latest exporters from many packages with generally very good success. What code are you using to render the model From your description it sounds like you might not be setting the World matrices correctly, so your rendering is ignoring the local transform matrices from the model bones data. Tag: Getting the Model width and height
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- How can I get XNA to draw stuff faceted? You could simply create textures that are applied to the surface of the wireframe... quick and dirty method ( : Setting the drawing method to wireframe is going to do exactly what you see... draw lines between vertexes, and leave the middle section clear. You need to apply some form of surface to the triangles/polys of your mesh. It doesn't have to be a graphical texture, but it might be the easiest way... -SysErr Tag: Getting the Model width and height
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- Creating Plane From A Model? As these forums are going to be turned to read only you should post your questions on the new http://creators.xna.com site. In regards to the log on have a look at my answer here on how to get yourself set up. Tag: Getting the Model width and height
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- Help needed with Spacewar Disaster Ummm, have you looked at the code in the Spacewar starter kit Tag: Getting the Model width and height
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- Displaying Videoframes with DirectX As I've answered to someone else in that post , I would recommend to don't lock the back bugffer but rather to fill a texture (using the some lock/unlock technic) and then render that texture to the back buffer. This can seems quite similar to what you've done, but modifying the back buffer introduce a synchronization stage between the cpu and the gpu (during the lock). During that time only one of the component will be able to work : the cpu. So avoiding that has the advantage to keep cpu and gpu tasks parallel and thus get more performances. It can also allow to do some of the video format conversion in a pixel shader, wich can be a huge optimization in some cases. In the other post I gave you the link, I've explained a bit how to do and also speak about non square and/or non power of two texture sizes issues.. Tag: Getting the Model width and height
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- Hiding the minimize/maximize/close buttons UNTESTED!!!!!! Add a reference to system.windows.forms and then pop this code in System.Windows.Forms. Form f = (System.Windows.Forms. Form )System.Windows.Forms. Form .FromHandle( this .Window.Handle); The you *should* be able to adjust about anything you can with a form class. I cant stress enough I havent tested this yet, nor do I know if its even recommended. Obviously this will only work on Windows too........ N EDIT Just added it to my code and it compiles and runs fine. The returned value IS a window but I havent tried chaging any proprties of it yet. EDIT 2 Removed the minimise box fine using f.MinimizeBox = false ; so I know it works here, but again, I dont know if its a recommended way of doing things........ Tag: Getting the Model width and height
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- Quake XNA update Looks great so far! Is your app going to work on both Windows and the 360 Are you planning to share the source code anytime soon -Mike Tag: Getting the Model width and height
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- Help on some shader issues The simple answer to your problem is to use a 1 byte per colour format like D3DFMT_L8 for your texture. Unfortunately, doing a palette lookup like this in a pixel shader may not produce the results you're expecting. You'll need to disable filtering (ie. use point sampling) otherwise your texture's index values will get interpolated before being sent to the pixel shader. If you want filtering you'll need to do it yourself in the shader. As for the complexity of colour indexed textures, video card manufactures actually dropped support for them because they were too expensive, in terms of space on the chip, to implement. You should consider whether it's possible for you to use one of the DXTn compressed texture formats (eg. D3DFMT_DXT1 ) instead. Tag: Getting the Model width and height
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- General Audio Disfunction Badly written code Tag: Getting the Model width and height
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- Stuttering in D3D application Most often stuttering is caused by dynamic creation of resources during gameplay. Other reason can be that you allocated more resources than total size of video memory and occasionally Direct3D runtime will swap textures in/out of video memory. Tag: Getting the Model width and height
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- Content Pipeline All of your content will need to be pre-processed. You can load any of the processed content at runtime, for example if you had 10 models you could add them to a combo box and let the user pick the one they want. You can do this dynamically too, but you have to create an MsBuild document and run MsBuild on that document file telling it what to do, there are examples of this on the forum. Several people wanted this to make editors. This would be suitable for that purpose, but not for a real-time game (too time consuming). Tag: Getting the Model width and height
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- Blurry trail on sprite movement I'm guessing it's your monitor, try it out on a CRT, if the ghosting still occurs, then it's a problem with the computer. My monitor does it for my laptop. Tag: Getting the Model width and height
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- Cross-platform development question Develop the code base that will exist in both projects in a 360 project, create the Windows Game project and link that code in then add whatever PC specific code you need (networking, WinForms, etc). Tag: Getting the Model width and height
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- Xbox 360 Hardware limits There are 3 cores, each of which is hyper-threaded, so there are 6 hardware threads. Of those, the XNA runtime has chosen to reserve 2, so you get 4 hardware threads for yourself. It appears that you get one thread for core 0, 1 thread from core 1, and both threads from core 2. The Xbox has 512 MB of RAM, which is shared between graphics, sound, game state, etc. Managed resources don't necessarily need to be duplicated in memory, though, because there's no risk of device loss/reset. You can do the math yourself based on that. (I would assume that some amount of space is used by the XNA framework, too -- say 32 MB for a conservative estimate) If you really want to know, you could create a linked list, and add class instances size 4000 bytes successively to that list, until you run out of memory. Count how many you could create before the exception. Tag: Getting the Model width and height
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- Raytracing with DirectX OK point taken but its still the graphcis chip on that motherboard that is supporting DX10 :-) I'm going to split off this question and move it to the DX10 forum so you can get an official answer. Tag: Getting the Model width and height
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- XNA Course at my local community college That's great! Very exciting to see courses like that coming to various places across the company. Thanks for sharing. Also remember, when posting a comment in the forums to mark it as a comment instead of a question. Helps make the forum admins jobs a little easier and we all know how hard they've been working lately! Tag: Getting the Model width and height
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- SFS 360 DEMO Download !!! As a minor point, I changed the name of the site from threesixbox.com to gameprojects.com, so listing both is redundant. I set up the old name to redirect to the new one though, so the old link still works. Tag: Getting the Model width and height
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- HLSL shader(s) using CPU instead of GPU It can't switch to using the CPU in the way you seem to suggest - that would require you to pull down your device and recreate it with the reference rasterizer. Vertex processing can run on the CPU but not pixel processing. That said, I don't know why you'd see this characteristic - but I'd hazard a guess it isn't directly the shader you're using. More likely the change has caused a bottleneck somewhere, or you're starting to see more draw-call overhead (etc..) Stepping through your frame in PIX and doing some decent profiling might help you find the true reason for the performance difference. hth Jack Tag: Getting the Model width and height
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- XNA sample code problem ? Moved to XNA forum but you should try reposting in the new forums http://creators.xna.com Tag: Getting the Model width and height
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- cloud of dust like in battlefield 2 : mc Particle system Tag: Getting the Model width and height
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- world coordinates 2d tile map How I've done it in the past is kept the coordinates of the top left tile and use the coordinates of a tile in the viewable area along with this to calculate the real coordinates for the map. I'm not sure what rotation has to do with it unless you've implemented a camera that allow this. Tag: Getting the Model width and height
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- A Question (Creators Club) A bridged connection may work, last time I tried it, though, it didn't work properly. I suggest getting a cheap wired router for around $40, though. Tag: Getting the Model width and height
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- problems with sprites It's likely to get satisfying responses to post it at the following forum. MSDN Forums Game Technologies: DirectX, XNA, XACT, etc. XNA Game Studio Express Please note that the forum has been transfered to XNA forums. http://forums.xna.com Thank you for your active participation on MSDN forums! Tag: Getting the Model width and height
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- How to get Angle from Thumbstick? Check out the Jan 3 entry "Rotating a sprite using an Xbox 360 ThumbStick" on http://xnagamer.spaces.live.com/ Tag: Getting the Model width and height
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Re: Getting the Model width and height
Bernhard Wolkerstorfer
You can get a BoundingSphere object for all the meshes in a model. After that you can convert them into BoundingBox objects. These two classes have a method for intersection calculation.
You can get a BoundingSphere object for all the meshes in a model. After that you can convert them into BoundingBox objects. These two classes have a method for intersection calculation.
Re: Getting the Model width and height
grifft
The BoundingSphere class already mentioned will give you a basic idea of the overall size of a Mesh (or the entire Model if you Merge the BoundingSpheres for each Mesh). The left most point is BoundingSphere.Center.X - BoundingSphere.Radius, right most BoundingSphere.Center.X + BoundingSphere.Radius, etc. This is just an approximation: the spheres don't work well on non-spherical objects.
There is a tutorial on www.riemers.net (in the forums, I believe) about creating a new Model class that will allow you to read the Model indices directly. Or, you could wait until the April/May XNA update which will provide updated access to the Mesh.
Just some ideas... hope they help.
Re: Getting the Model width and height
grifft
As an update to this post, the XNA 1.0 refresh was released today. I guess I answered a day early. 
http://msdn2.microsoft.com/en-us/xna/aa937795.aspx