Generating MipMaps

Game Technologies: Graphics

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    - Camera Behind Mesh Probably the easiest way to do this would be to use the Matrix.LookAtLH method, which allows you to specify a target and location for the camera. You could build these yourself from the information you have on your mesh's position or orientation, or you could generate them using the world matrix that you will be applying to the mesh, like this: // mMesh is world matrix that will be used to render mesh // transform 0,0,0 to get origin of mesh in world space Vector3 vLookAt=Vector3.TransformCoordinate(new Vector3(0.0f,0.0f,0.0f),mMesh); // transform 0,5,-10 to get coordinate a distance of 10 behind mesh origin Vector3 vEye=Vector3.TransformCoordinate(new Vector3(0.0f,0.0f,-10.0f),mMesh); // transform up vector to match orientation of mesh Vector3 vUp=Vector3.TransformNormal(new Vector3(0.0f,1.0f,0.0f),mMesh); // create and set the view transformation device.Transform.View=Matrix.LookAtLH(vEye,vLookAt,vUp); // render the mesh device.Transform.World=mMesh; ..... Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - XNA sprite behavior -- weird side effect Eli, Are there any performance considerations to which option to choose I certainly find it easier to set the SaveStateMode than to manually adjust my device, but I wonder if it would ever be prudent to manually change just the device settings necessary Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - XNA Demos Released Remember to make sure when you make announcements to mark the post as a comment and not a Question. Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - help please Rendertarget on xbox360 you can onlye have one i treyd rendertarget and backbuffer when i resolve the rendertarget on xbox it is not resolve i have been working for 3 weeks now and this is a bug and porting my engine to xbox i will give any one 100 dollars if you can get the above sample to run on xbox from it onlye use one rendertarget at the time but nothing is resolve i even tryed to resolve to a texture shawn please give a try .. get to run on xbox width both rendertarget on xbox and you see nothing is ever resolve to a backbuffer , texture when you draw it is blank this sample code is taking from the above sample where is the bug why does it not work on xbox protected override void Draw( GameTime gameTime) { // Alternate which texture gets the white square drawn on it and which // gets the fullscreen quad drawn on it. RenderTarget2D renderTargetFirst = renderTargets[curInitialRenderTarget]; curInitialRenderTarget = (curInitialRenderTarget == 0 1 : 0); RenderTarget2D renderTargetSecond = renderTargets[curInitialRenderTarget]; // Draw our square on the first RT graphicsDevice.SetRenderTarget(0, renderTargetFirst); if (gameTime.TotalGameTime.TotalSeconds == 0) // Only need to Clear the first time through graphicsDevice.Clear( Color .Black); spriteBatch.Begin(); spriteBatch.Draw(tex, new Rectangle (( int )x, ( int )y, ( int )width, ( int )height), Color .White); spriteBatch.End(); graphicsDevice.ResolveRenderTarget(0); // Transfer from first to second RT graphicsDevice.SetRenderTarget(0, renderTargetSecond); effect.Begin(); texParameter.SetValue(renderTargetFirst.GetTexture()); dxParameter.SetValue(1.0f / viewportWidth); dyParameter.SetValue(1.0f / viewportHeight); EffectPass pass = effect.Techniques[0].Passes[0]; pass.Begin(); graphicsDevice.VertexDeclaration = vdecl; graphicsDevice.Vertices[0].SetSource(vb, 0, bytesPerVertex); graphicsDevice.Indices = ib; graphicsDevice.DrawIndexedPrimitives( PrimitiveType .TriangleList, 0, 0, numVertices, 0, numPrimitives); pass.End(); effect.End(); graphicsDevice.ResolveRenderTarget(0); // Draw second RT onto backbuffer graphicsDevice.SetRenderTarget(0, null ); spriteBatch.Begin(); spriteBatch.Draw(renderTargetSecond.GetTexture(), new Rectangle (0, 0, ( int )viewportWidth, ( int )viewportHeight), Color .White); spriteBatch.End(); } } Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - I want to use a simple fx shader on a simple loaded model Thanks a lot. It works perfect. Regards Michael Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - 1946 part 1 "no missions" no i made a new gameover code it is faster then yours. now I am working on Sky Destroyer 3d. it was a Nes game I will rewrite it. need 3d help! Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - beginners tutorials OK, here we go: http://learnxna.com/default.aspx http://msdn.microsoft.com/directx/xna/learning/ http://msdn.microsoft.com/directx/Community/default.aspx http://www.ziggyware.com/news.php http://xna101.spaces.live.com/ http://xnaresources.com/ http://www.xnatutorial.com/ http://www.xnadevelopment.com - since George won't pimp his site That should keep you busy for awhile. Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Z-Order in XNA Hello, I was wondering if there is any information on Z-Order in drawing sprites to the screen. I basically need a good way to draw a game with layared sprites. Thanks Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - help regarding a game Hi all, i just need help to move a ball in different direction Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Is there any way to tell if a sampler has a texture attached in shaders? Alexey Barkovoy wrote: No, there is not such functionality available in shader. Indeed. Probably a clunky solution would be to intercept ID3DXEffect's texture changes when setting the shader on the device by using a state manager, or by simply GetTexture() on every slot to see what is being bound there... Yes ugly :| Alexey Barkovoy wrote: If you want to use other color, just attach 1x1 sized texture in your code when no texture is needed. I think such things were actually used for emulating "default" black behaviour in some older HW. I'd use shader constants for that... You'll just introduce additional latency and overhead that way... Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Anyone know a good tutorial that teaches you XNA and how to make games? First point, Search these forums for tutorial, many may posts on tutorials available. Second Goto the main XNA MS site for starting info, msdn.com/xna finally, install C# express and XNA game studio and open the help, lots of starter guides there. I would strongly reccommed gogn through all the 2D tutorials and make a 2D example game first, 3D gets very complex and the 2D background will help a lot, so get to know 2D first Rgds Darkside Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Refreshing the graphics I'm just trying to draw the sprite WHILE the game is running, NOT BEFORE IT STARTS. I created a DrawableGameComponent called Sprite, which adds itself to the game.Components on it's instantiation. So, suppose I want to create a new sprite in the Program class, it works this way: Sprite sprite = new Sprite(game, @"Contents/Character", new Rectangle(134, 126, 32, 48), Color.White); game.Run(); But I need it working this way: game.Run(); Sprite sprite = new Sprite(game, @"Contents/Character", new Rectangle(134, 126, 32, 48), Color.White); I need to be able to draw a sprite WHILE the game is running. Don't worry, I have a reason to do this. Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Build for Xbox 360 and Windows in one project Too funny, I built the same thing last night but with a game library project as well. The only other differences are I didn't put in my own icon, and mine are called UniversalXnaGame and UniversalXnaLibrary". I didn't know about the __TemplateIcon.ico trick...most slick. Hope you don't mind if I "borrow" that trick. ;-) I am in the middle of building a Package plugin for mine as as well as a simple installer. This way the template will show up in the top part of the list, and is available for all users. Granted building a VS Package is overkill for such a minor thing, but this will also serve as platform for some other ideas I have. Incidentally, maybe I'm missing something, but I don't see why it is necessary to turn on advanced build configurations to use this I can use my template just fine without it. When I change the Solution Configurations or Solution Platforms it builds the correct thing automatically the next time I build. Clearly I'm missing something Thanks - Ryan Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - RenderTarget2D rendered with garbage all over it Here's the pic: http://skasoftware.com/pics/zbug.jpg That's a frame of Shaun of the Dead in there (which I was watching in WinAmp)... Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - silly question Cool thought so :) thanks for the help and quick reply! Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - SpaceWar with a PC controller? Thanks for the thoughts. I'm glad people are already questioning the non-existance of this obvious need. I don't know how I can work with something that left out something so important as this. I hope Microsoft fixes this quick because we have decisions on tools to make, and we're hoping by far to use XNA for our titles. Taking out DirectInput for PC versions of the game is a big no no... I'll try that code you provided, but I guess this is why I hate portability with other platforms. Too much necessary stuff get taken out. If they detected the game opened on a non-xbox360 machine, it should be fine to enable DirectInput without causing an exception. C++/DirectX is much uglier than XNA, but if it does the job... Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Interfaces You often use interfaces when a group of classes have a similar behaviour but are otherwise unrelated. Sometimes this is because they can all do a second 'trick', like generate log data, but you don't want them to all have the same base class (so it is like a cheap multiple inheritance). Another example might be when you load plugins - you could force all user created plugins to inherit from your plugin class, but that can get ugly if they have their own inheritance chain already. So you just require them to have something like Load(), Unload(), and Run() methods. After that you have no idea what they do, but that is all you need to know. Then when you use a plugin, you limit yourself to just using those methods, which helps keep things segmented and clean. Just for a third example, say you have 'commands' in your program, they can 'do' and 'undo'. So you can have an ICommand interface that requires 'Execute()' and 'Unexecute()' methods. Then you can save all the commands that have been run in a list, and to undo or redo is just a matter of going up or down the list calling the appropriate methods. The good part is existing code can be turned into a command by just adding those two methods and the interface (implementing the interface). A second use it when you have things that really actually need multiple inheritance. Maybe you have an animation that also behaves like a button sometimes, but you really can't make it a button because it is also a Movie. You can't make it inherit from both, sometimes composition isn't going to work either, so you use interfaces. The nice thing is when you pass it to a method that takes an IAnimation, the method sees it only as an animation. Then you pass the same object to a method that takes an IButton, and it sees it only as a button. That should fog things up ; ). Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Second series (13 parts) of 3D XNA tutorials finished +flightsim I'm no expert at XNA, especially the vertex elements, but what I can tell you: Vector3 Position = 3 floats (1 float = 4 bytes) Color Color = 1 int (1 int = 4 bytes) Vector3 Normal = 3 floats = 3 + 1 + 3 = 7 7 * 4 because each float is 4 bytes therefore each Vector3 takes 12 bytes A texture coord is made up of 2 floats, u & v. So now you have position + normal + texture = 3 + 3 + 2 = 8! So your last line should be sizeof(float) * 2 not 4. HTH Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - multiple DSP in XACT you can have only one DSP :( Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - XNA Starting Thank you very much. That helps a ton. Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Poor XNA performance or my poor code... or normal? Set your effect variables that don't change outside the draw method, then, change your draw method to something like this public void Draw(GameTime gameTime) { graphics.GraphicsDevice.Clear(Color.CornflowerBlue); foreach (ModelMesh mesh in CubeMesh.Model.Meshes) { BasicEffect effect = (BasicEffect)model.Effects[0]; foreach (CubeMesh cube in captureZoneSystem.capturePoints) { effect.DiffuseColor = cube.Color.ToVector3(); effect.World = Matrix.CreateScale(cube.Scaling) * Matrix.CreateTranslation(cube.Position) * Matrix.CreateRotationX(MathHelper.ToRadians(captureZoneSystem.XRotation)) * Matrix.CreateRotationY(MathHelper.ToRadians(captureZoneSystem.YRotation)); mesh.Draw(); } } } Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - loading large image using DirectX Thanks for your reply. One of the problems is: can I load a texture which is not a power of 2 Because that's what I've read.. to load a texture, its size has to be a power of 2. Any links/tutorials for loading a texture in Directx And how can I subdivide my picture intro smaller ones and only render that part of the picture that is displayed on screen Because I think it's useless to render even the parts that are not currently displayed. Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Short tech demo How in the heck did you get access to the wiimote device memory on the 360 in XNA I've been able to write a driver for the wiimote but I had to use C++/CLR and C# so its only windows compatible. Share the wealth man! Ziggy www.ziggyware.com Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Making an entire viewport transparent I cant find any examples on drawing to that Render2D object. do you know of any links nvm, ill just ask another Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Material vs Shader I should have mentioned I have no problems understanding HLSL, that was not my question. Maybe the original usage of Material is out of place with current technologies used to describe properties of a surface (shaders do this), this is my idea of material: Glass Wood Concrete Rock Stone Clay Carpet Paper Plastic Plant Metal Cloth Fluid This is the dictionary definition of material: the substance or substances of which a thing is made or composed: Stone is a durable material. The original D3D Material, in my mind is out of place with shaders, maybe LightingProperties would have been more suitable, because a material is so much more than how a surface deals with light, surely Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Nvidia Vista Drivers Hello, I'm seeing a problem with the latest NVidia drivers on Vista (version 97.46 realeased on 5th Jan 2007), and I was wondering if anyone else is experiencing similar problems. The display card is an NVidia GeForce 6800 LE, but I don't think its specific to that display card. The problem I'm seeing is that DrawIndexedPrimitive() doesn't seem to draw anything if the BaseVertexIndex argument in DIP is larger the MaxVertexIndex caps value. The return value from DIP is OK, but it doesn't draw anything. I'm drawing representations of oil reservoirs made up of a large number of quads. The whole reservoir goes in a single vertex buffer which can often exceed 100MB in size. I am using an index buffer containing around 3000 indices. The contents of the index buffer are kept the same and the vertex buffer is drawn by increasing the the value of BaseVertexIndex at each DIP call. If further clarification is needed I can provide a code snippet. I've also written a very short test program to investigate this and I'm seeing the same effect. This approach of offsetting BaseVertexIndex to draw large vertex buffers has been working for us with no problems for several years now on XP on a range of cards, and we've had no problems drawing vertex buffers up to 200MB in size. I know this problem should best be addressed to NVidia but it seems to a little difficult to get technical answers of this kind answered directly by NVidia. On a related note, we'd like to use the newer cards with 512MB of memory to draw vertex buffers up to 512MB in size, but the maximum vertex buffer you can allocate seems to be around 256MB. Does anyone have any experience of this Thanks for any help, Robert Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Game AI Didn��t say this before, but when accesing the Map, you cannot of course just plug player��s position into the array indexers. You have to search for the closest point in the map. For example: Player��s position = (0.3453, 0.2556) Closest Point in Map = (0.3, 0.25) Height at point = HeightMap [ 0.3 ] [ 0.25 ] Cheers! Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - read pixel of speficic face of cubemap in hlsl Hi, I would like to use gpu to convert the cubemap pixels and need to use the cubemap faces one by one as texture to do my shader. Does anyone know if i can read pixels from specific face of cubemap in shader Since I can't change the texture head in pc to set cubemap surface as texture. and in texCube(s,uvw) the uvw is the reflective vector. Is there easy way to do it except lock the cubemap surface and copy data to a texture Thanks. Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - Line Colours We have a massive amount of line data to display and it just seemed a waste to include colour at each vertex as we're just using a single colour. Don;t know what a vert shader is sorry - any advice I tried looking for the line class as it looked really promising but it doesn;t seem to exist, plenty of samples on the net but its not in my dx9c SDK and its not an option when i look for it in dxdiag Is it an older function which is being phased out or is it absoluletly brand new so i don;t have it in my SDK Thanks for any advice Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - please help Using my psychic powers, I believe the original poster is trying to cross-debug from Windows to Xbox 360. When trying to start the program, the 360 apparently does not answer, and the IDE will generate an error about that fact. Make sure that you're signed in to the creator's club, have set up the Xbox to listen for PC connections, have added the right IP address, etc. I think there might even be an Xbox remote debugging trouble-shooter document in the help file which you might want to read. (Press F1, then use Search to find the right document). But, in general, a request for help should have the following: 1) A title that describes what the problem is. For example: "Can't debug project on 360" 2) A short description of what you want to do. For example "I'm trying to start a project I've built in XNA game studio express onto the 360, but it doesn't work." 3) A thorough description of what you expect should happen, and what actually happens, including writing the text of any error message. This is not optional. 4) A short description of what you have tried already. For example "I don't know what to try, as I don't know what help file to read." 5) Correct grammar and spelling is helpful, but not totally necessary if you already have points 1 through 4 down. Looking at your post, you didn't hit a single point, so consider this your chance to learn how to ask smart questions that get good answers. Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - 2D Lines I got my 2D lines working, but now they won't change colors. I'm just gonna post my code, and if anyone sees why I can't get my lines to be anything other than black, or if you see anything else I can improve on, I would appreciate it . public class Renderer { GraphicsDeviceManager graphics; public SpriteBatch spriteBatch; public Texture2D Epoch1, Epoch2, BlackBird, Player; public Vector2 testSpritePosition = new Vector2(300.0f, 300.0f); public Vector2 BlackbirdPosition = new Vector2(0.0f, 0.0f); // UI stuff //Matrix UIProjection = Matrix.Identity, UIView = Matrix.Identity; Vector3 leftpos1 = new Vector3(-3500.0f, 3000.0f, 0.0f); Vector3 leftpos2 = new Vector3(-3500.0f, -3000.0f, 0.0f); Vector3 rightpos1 = new Vector3(3500.0f, 3000.0f, 0.0f); Vector3 rightpos2 = new Vector3(3500.0f, -3000.0f, 0.0f); VertexPositionColor[] leftUIBorder = new VertexPositionColor[2]; VertexPositionColor[] rightUIBorder = new VertexPositionColor[2]; public BasicEffect effect; Matrix UIProjection = Matrix.CreatePerspectiveFieldOfView((float)Math.PI / 2, 1680.0f/1050.0f, 0.1f, 1000.0f); Matrix UIView = Matrix.CreateLookAt(new Vector3(0, 0, -50), Vector3.Zero, Vector3.Up); public Renderer( GraphicsDeviceManager device ) { graphics = device; // UI initializing leftUIBorder[0] = new VertexPositionColor(leftpos1, Color.Red); leftUIBorder[1] = new VertexPositionColor(leftpos2, Color.Red); rightUIBorder[0] = new VertexPositionColor(rightpos1, Color.Pink); rightUIBorder[1] = new VertexPositionColor(rightpos2, Color.Pink); } public void ClearScreen() { this.graphics.GraphicsDevice.Clear(Color.White); } public void DrawTestSprite() { if (Player.Equals(Epoch2)) { spriteBatch.Draw(Epoch1, testSpritePosition, Color.White); Player = Epoch1; } else { spriteBatch.Draw(Epoch2, testSpritePosition, Color.White); Player = Epoch2; } } public void DrawBlackbirdSprite(Texture2D sprite) { spriteBatch.Draw(BlackBird, BlackbirdPosition, Color.White); } public void DrawUILine() { effect.EnableDefaultLighting(); effect.VertexColorEnabled = true; effect.World = UIView * UIProjection; //effect.World = Matrix.Identity; effect.Projection = UIProjection; effect.View = UIView; graphics.GraphicsDevice.VertexDeclaration = new VertexDeclaration(graphics.GraphicsDevice, VertexPositionColor.VertexElements); effect.Begin(); foreach (EffectPass pass in effect.CurrentTechnique.Passes) { pass.Begin(); graphics.GraphicsDevice.DrawUserPrimitives<VertexPositionColor>(PrimitiveType.LineList, leftUIBorder, 0, 1); graphics.GraphicsDevice.DrawUserPrimitives<VertexPositionColor>(PrimitiveType.LineList, rightUIBorder, 0, 1); pass.End(); } effect.End(); } } Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.
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    - [c#] Mesh.ComputeTangentFrame throws InvalidDataException thanks, but unfortunately thats not the problem, i was already that desperate to try that... :( luckily i managed to find a workaround : if i replace : mesh.ComputeTangentFrame( 0 ); with : mesh = Geometry.ComputeTangentFrame(mesh, (int)DeclarationUsage.TextureCoordinate, 0, (int)DeclarationUsage.Tangent, 0, (int)DeclarationUsage.BiNormal, 0, (int)DeclarationUsage.Normal, 0, 0, null, 0f, 0f, 0f, out stream); then it all works out. no stupid exception. (with the same vertexdeclaration.. ) the only question is: if it works this way, why doesnt it work the other way Tag: Game Technologies: Graphics Generating MipMaps Game Technologies: DirectX, XNA, XACT, etc.

REspawn

Hi,

When I create a texture using the code below the mip maps always come out as a solid color, how can i generate proper mip maps from the texture

TextureImage = new Texture(device, ii.Width, ii.Height, 5, Usage.None, format, Pool.Managed);

SurfaceLoader.FromSurface(TextureImage.GetSurfaceLevel(0), textureTexture.GetSurfaceLevel(0), Filter.None, 0);

TextureImage.GenerateMipSubLevels();

Thanks for any help, -Dave

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Re: Game Technologies: Graphics Generating MipMaps

Ralf Kornmann

You are a victim of a common misunderstanding what GenerateMipSubLevels do. It is only there to create the mip maps for textures that are used as render target. And even then they need to create with special parameters.

The function you are looking for is TextureLoader.FilterTexture.

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Re: Game Technologies: Graphics Generating MipMaps

REspawn

Thanks Ralf, will check it out.

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