XNA sample code problem ?

XNA Framework

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    - Help needed with Spacewar Disaster Hello, I am a C# begginer and i was just wondering if anyone could help me with a little problem. I have made a basic Spacewar game following a gamestate system. when the game load you press X and the game begins. you are meant to be able to fly a spaceship around but all i can get it to do is turn. i have some code which should fix the problem but i don't know where to insert it. Vector3 modelPosition = Vector3 .Zero; float modelRotation = 0.0f; //Position of the Camera in world space, for our view matrix Vector3 cameraPosition = new Vector3 (0.0f, 50.0f, 5000.0f); //Aspect ratio to use for the projection matrix float aspectRatio = 640.0f / 480.0f; anythough on where the code goes or how to fix the problem would be much apreaciated Tag: XNA sample code problem ?
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    - Displaying Videoframes with DirectX I use a open source codec/video library (libavcodec). This lib exposes the video frames as 24_bit RGB bitmaps in memory. All I want to do now, is displaying those frames in a window as fast as possible. I tried a very naive approach: for ( unsigned int i = 0 ; i < Framenumber; i++ ) { Load->get_nth_frame( ID, i , RGBFrame ); DXDev->BeginScene(); Backbuffer->LockRect( &LR, NULL, 0); // [ memblit Copies RGBFrame pixelwise to Backbuffer , same function as //D3DXLoadSurfaceFromMemory ( Backbuffer, NULL, &SrcRect, RGBFrame, //D3DFMT_R8G8B8, Pitch, NULL, &SrcRect, D3DX_FILTER_NONE, 0);] memblit ( RGBFrame, (char*)LR.pBits, w, h, LR.Pitch ); Backbuffer->UnlockRect( ); DXDev->EndScene(); DXDev->Present( NULL, NULL, NULL, NULL ); } It turns out, that this is far to slow. (I am not sure, if this is due to the used technique, or some other directx misconfiguration.) Anyway, which is the best approach you would recommend for displaying video through DirectX Thx A.Gallus Tag: XNA sample code problem ?
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    - Hiding the minimize/maximize/close buttons Hey everyone, I'm trying to figure out a quick and easy way to either hide the surrounding window of my XNA game entirely, or at least remove the buttons. I could do this the long way, by making an actual windows form and a graphics device and blah blah blah... But I wanted to know if there is a quicker way to do this. Thanks for any help. Tag: XNA sample code problem ?
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    - Quake XNA update Since the XNA 1.0 release I have been quite busy at first trying to run stuff on my XBOX360 and then doing the jump to a fully working port of Quake (best deathmatch ever!) So after 3 week of hard part time work on this I can now see something that look not too bad =) The lightmaps still have issues but I'm quite happy of the result so far. Before starting I had a good knowledge of C# but I my C/C++ skill are still far behind but enough to understand what the Quake code was about in most case. This is my first 3d engine ever but in RL I'm an animation TD for a major game publisher, meaning that I do understand quite well what I had to do and how to do it. So far I'm having a really good time using this and I don't have much to complain about versus the real dev kit I use at work. Complete task: BSP Class to load the Quake bsp level. (Currently load everything there is to load and place it in structs using Quake naming for easy reference). Quake paletted lmp textures to bitmap converter so I can load them as Texture2D. Lightmap builder use the bsp lightdata and generate 16x16 bitmap for blending in a pixelshader. (I'll add per pixel light and stencil later but I really wanted to load the original lightmaps as a challenge). Surface Renderer, create triangle list from the surface edges, generate uv, sort by textures Whats next Code review and cleanup to speed things up. I'm doing some really ugly things right now and just the lightmaps take forever to load and drop the frame rate 50% when enabled. Player 2d navigation and BBox collision. MDL renderer for the monster, weapons ect. Game code, I'm not gonna use the QuakeC generated code because I pretty sure its gonna be faster to rewrite it in C# than supporting the progs.dat from Quake. Skybox Warping texture (water, teleport ect) Particule system. Still reading Here some screenshots! http://perpixel.dyndns.org/~guillaume/ Tag: XNA sample code problem ?
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    - Help on some shader issues Well the real thing here is that I'm new to the programming pipeline so I kinda need some help on this. The thing is that I want to render primitives but with a custom texture format (CLUT, as in Color Look-Up Table, from the PSx anyone ). This textures instead of having a color have an index that goes to another 1D texture containing the actual color. Imagine this, you have a regular texture that has 4-bytes per color RGBA32, and each component instead of being the brightness level of that color is an index to a 256x1 texture containing the actual color. The problem relies in the fact that you have 4 colors in a "color" or fragment for that matter. But once you get to the pixel shader rendering part you can't 'spawn' new fragments. So how do I do it to map the correct color on the fragment... Or another way, how do I do it to transform that texture into the correct format and then in another pass use that texture. Any approach or Idea would be greatly appreciated. It would simplify my work alot by simply handling this conversion or transformation in the GPU, and I figured, since the gpu usually does tasks that are way more complex than this in regular games, why should I lose performance by doing it in software, besides the fact that it would complicate things a lot more by doing it in that way. Thanks in advace, and I'm sorry if I didn't explained better, but english isn't my native language. Regards, Alberto Tag: XNA sample code problem ?
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    - Getting the Model width and height 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 Tag: XNA sample code problem ?
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    - General Audio Disfunction After about 10-15 minutes of gameplay, the audio slowly begins to become more and more distorted and fractured sounding. Both the sound FX and BGM gradually become more choppy and grainy sounding while dragging down the overall performance of the game. Any ideas Tag: XNA sample code problem ?
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    - Stuttering in D3D application Hello, we're experiencing stuttering in our D3D game. With stuttering, I mean that the game loop will generally take 20-30 milliseconds to complete, running smoothly at ~30 fps. But then, like once per second or so, the game loop will take like 150 milliseonds or more to complete. The stuttering happens on many different computers so I don't think it's a driver/hardware/setup problem, but rather something that we're doing in our rendering that's causing the stuttering. Many other games run fine on these computers. I've profiled parts of the code.. and usually the huge delays come from D3D Present() method or the actual rendering. Does this indicate that there's a problem with the rendering command queue being filled up and stalled or something Are there any known common mistakes one can make in D3D code that will cause the application to stutter like this, once every 20-30 frames or so It seems like there should be a simple remedy for this, since the framerate is generally quite decent - it's just that the application seems to halt occasionally. I know that a few other games have had problems like these, namely U1, UT2003, DDO.. and probably some others. Ideas Tag: XNA sample code problem ?
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    - Content Pipeline Hi, I haven't really used the Content Pipeline seriously yet but I've seen the official tutorials on it and understand them. Now, I'm thinking - what if I want to load a certain model/effect or anything else that the Content Pipeline supports - BUT I want to load it dynamically/at run-time, e.g. I have a certain filename that my code wants to use to load content, but I don't know it until runtime. Is there some sort of dynamic way of using what otherwise seems to be a static Content Pipeline Thanks... Tag: XNA sample code problem ?
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    - Blurry trail on sprite movement Hi all, I read some posts about problems with AMD processors. I am not sure my issue is caused by that because I have a different processor from the ones I read the posts about. The issue: I have a simple ball sprite. I create a pong-like game. When the ball moves it produces a blurry trail behind it. Like you have with comets in space. The faster the sprite moves, the longer and more noticable the trail. In response to this I have updated the drivers for my processor and grapics card. The result is the same. Beside the blurry trail I notice the movement is always a littlebit choppy. Not extreme, but I think it ought to be somewhat smoother than this. So no I am wondering what might be causing it. Can it be the processor or the graphics card. Or maybee it is the monitor On LCD tv's I've seen the same effect watching a soccer game. My configuration: AMD Sempron 2800+ / 1,61 Ghz / 512 MB Geforce 6800 Xtreem Philips SL120 LCD monitor Thanks, Ton Tag: XNA sample code problem ?
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    - Cross-platform development question Hi guys! I intend to make an application and deploy it on PC and XBOX. I want to know how do you want me to do it I see some ways: I can copy my code in other directory and change references to Compact Framework. As a result I'll have two copies of my code. It's the worst alternative, isn't it I can use only Compact Framework even on PC (if it's possible); Something else What is the best way to do it Tag: XNA sample code problem ?
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    - Xbox 360 Hardware limits Hi, I've been searching around for the answer to two questions but have had no luck. Firstly how much system memory can an Xbox360 XNA game actually use. I know the executable size is limited to 50Mb just like Arcade games, but with procedural techniques you could still use up lots of physical memory. Secondly how many cores are available on the xbox 360 for use to XNA developers. Are two cores powered down so we in effect only have two hardware threads or can we use all six. Judging by the fact the fan is not on 'noisy';) I assume it is the former. Many thanks! Tag: XNA sample code problem ?
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    - Raytracing with DirectX [original question from split thread http://forums.microsoft.com/MSDN/showpost.aspx postid=1274336&siteid=1 ] As a sidenote, if you know, could you explain to me the relationship between Shader Model 3.0/4.0 and DirectX9/10. I've read the documentation, but am a little confused. If a motherboard supports DirectX 10, does it automatically have support for SM4.0, or can it be DX10 and still only have support for SM3.0 Actually, there is a case where some new motherboards support DirectX 10. The Intel, DG965WH says in its manual: http://www.intel.com/design/motherbd/wh/wh_documentation.htm that it does support DirectX 10 through the onboard video chipset X3000. There are conflicting reports on the internet and I'm wondering if DirectX 10 support explicity implies Shader Model 4.0 support, even if its added afterwards with a driver update. Put simply, will the Intel DG965WH, as described in the technical support document, Support DirectX 10 as well as SM 4.0 Tag: XNA sample code problem ?
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    - XNA Course at my local community college I just got a flyer in the mail about a non-credit course my local college (Miami Dade College) is offering. Its bout 4 saturdays, 3 hours each. $339. Game Development: XNA Game Studio Express - $339.00 Pre Req - N/A XNA is targeted at students and hobbyists for game development. XNA Game Studio lets developers target both Windows and Xbox 360. You will learn:Visual Studio C# Programming Basics, Network Play basics, input control basics, and Sound Basics;2D Sprites versus 3D game creation, using 3rd Party gaming engines; The XNA Framework, a set of managed code development libraries that make it possible for game developers to be more productive when creating games for Windows and the Xbox 360;The XNA Framework Content Pipeline, which is a set of tools that allow developers to more easily incorporate 3D content into their games. i think i know the professor that would be teaching it, and hes really good at gamedev. id probably take the course, but the army has me way too busy this Spring semester to do this. hopefully its offered over the summer. looks interesting/fun! Tag: XNA sample code problem ?
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    - SFS 360 DEMO Download !!! Download the ALPHA Test Demo for Simple Flight Simulator 360 ... http://games.archor.com ... Click on "XBOX 360 Games" ... Screenshots available on the Site ... - You can also Download it from the 360 Projects Section at .... http://www.gameprojects.com - Fly Your Helicopter around the Big City ! Notes: - The Project is still in the Very Early Alpha Testing Phase and has a long way to go before it is complete. - Source Code and Resources are included. - Just Build and Deploy to the 360 via XNA GSE. - Use the XBOX 360 Controller Left and Right ThumbSticks to Move and Spin. - Press the "Back" Button to End. Tag: XNA sample code problem ?
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    - HLSL shader(s) using CPU instead of GPU I am using D3DXCreateEffect to create a vertex and pixel shader HLSL effect. The process I use to create and activate the effect is the same every time, I am only changing the pixel shader code, and here's what happens: My program renders about 50 fps generally with CPU usage around 4% and when I do a trivial RGB to BGR color swap with the following shader, this usage remains: PS_OUTPUT RenderScenePS( VS_OUTPUT In ) { PS_OUTPUT Output; // Lookup mesh texture and modulate it with diffuse Output.RGBColor = tex2D(MeshTextureSampler, In.TextureUV) * In.Diffuse; float r = Output.RGBColor.r; Output.RGBColor.r = Output.RGBColor.b; Output.RGBColor.b = r; return Output; } So with this shader the rendering does a dynamic RGB to BGR swap entirely on the GPU I figure, because the CPU usage is still around only 4%. Now I just change the shader, nothing else in any of the code anywhere, to this: PS_OUTPUT RenderScenePS( VS_OUTPUT In ) { PS_OUTPUT Output; // Lookup mesh texture and modulate it with diffuse Output.RGBColor = tex2D(MeshTextureSampler, In.TextureUV) * In.Diffuse; // Demo: 4-bit grayscale float avg = (Output.RGBColor.r + Output.RGBColor.g + Output.RGBColor.b) / 3.0f; avg = round(avg*16.0f) / 16.0f; Output.RGBColor.r = avg; Output.RGBColor.g = avg; Output.RGBColor.b = avg; return Output; } To me this seems simple enough but for reason my CPU usage goes way up when this shader is running (and the system lags like crazy). The rendering shows the grayscale image, so it is working, but the CPU usage is off the charts. I thought shaders were supposed to execute entirely on the GPU so I'm confused how it's possible that my CPU usage is going up unless something needs to be emulated in software. In my D3DXCreateEffect call I have the D3DXSHADER_NO_PRESHADER flag, (along with the not cloneable flag) which seems to be the only CPU-related flag available. My video card should be more than capable of such a shader even though it's not an ultra-powerful card (NVIDIA GeForceFX 5200). What would cause a pixel shader to use the CPU power Tag: XNA sample code problem ?
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    - cloud of dust like in battlefield 2 : mc does anybody know how the developers from battlefield 2 : modern combat did the cloud of dust effects did you know what i mean Tag: XNA sample code problem ?
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    - world coordinates 2d tile map hello all.. i have a little problem.. i usw a 40*40 tile map. visible is a area of 12*15. everything is working very well.. also the scrolling... how can i calculate the world coordinate of the map... i do it this way.... else if (_Spieler.Aktiv.ScreenPos.X < 150) { // Der Panzer wurde weiter nach unten rechts (Drehwinkel im 1. oder 2. Quadranten if ((_Drehwinkel >= ( MathHelper .Pi)) && (_Drehwinkel < ( MathHelper .Pi * 2))) { // Map scrollen _Map.MapScrollen(_Spieler, _Map); } else { _Spieler.UpdateVorwarts(_Spieler, _SpeedVor); } } this makes the player moving or the map scrolling... if the map is scrolling i substract the new x value of the world position worldpos.X -= math.abs( _Spieler.Aktiv.SpeedVor * ( float ) Math .Sin((( MathHelper .Pi / 2) - _Spieler.Aktiv.Drehwinkel))); this is working.. but i get a different value if i am at the end of the map. the value depends on the angle of rotation !! the longer the way to the end of the map is the bigger is the difference... can anybody give me a hint how to calculate the world position on a scrollable tilemap` i need the exact position of the map because i want to draw world coordinate objects on it... please help me.. if you want more code. i can post it here Tag: XNA sample code problem ?
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    - A Question (Creators Club) I was wondering this. Since I have a cable connection (no router) directly to my computer, how would I connect my Xbox to my computer so I can use the Creators Club Right now I just disconnect the Ethernet cable from the back of the cable modem and connect the Xbox 360 Ethernet cable to get Live on my 360. Tag: XNA sample code problem ?
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    - problems with sprites hello I am trying to make a weapon system on my first xna game. I was wondering if anyone could help me with a problem I have. Im using the XNA "How to" examples to try and render a simple texture as a sprite. I managed to use the first "how to render a sprite" example to render a sprite. the problem is, but i want to be able to position my sprite where I want so I used the second "How to" example. so I read through the tutorial and got the code in my game but when I run, I get an error saying my texture is being called as a texture2D instead of an AnimatedTexture(the code is made for an animated texture) so i guesss my texture is not animated.. but I dont want an animated texture! I just want a simple one and I just cant work out how to do it.. I found this other tutorial that seemed good but included this weird camera that can be rotated around the sprite... the camera code was buggy and didnt let my code run.. all I want is to know how to render a sprite at a given location and be able to change the variable to move it around. So Iv been fiddling around aimless, not knowing what Im doing trying to get this sprite to appear. Once I get this sprite rendered I think I might be able to work out a way to get it moving like a rocket or something. anyway this is my code , can somebody please help me, or maybe point me to a good tutorial. at this point in time Im getting an error saying Error 1 'Microsoft.Xna.Framework.Vector3' does not contain a definition for 'ViewMatrix' C:\Documents and Settings\something \My Documents\Visual Studio 2005\Projects\WindowsGame3\WindowsGame3\Game1.cs 133 45 Spaceshooter this is my code (i know its very messy and some parts are completely useless but hey Im new and Im experimenting with anything I can find, also iv commented a lot of stuff out because I experiment but I dont want to loose the original working partts of the code so I comment them out, add the new code and see how it goes). If someone can help me i will be extremely thankful! #region Using Statements using System; using System.Collections.Generic; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Audio; using Microsoft.Xna.Framework.Content; using Microsoft.Xna.Framework.Graphics; using Microsoft.Xna.Framework.Input; using Microsoft.Xna.Framework.Storage; #endregion public class Game1 : Microsoft.Xna.Framework. Game { GraphicsDeviceManager graphics; ContentManager content; KeyboardState oldState; Matrix projectionMatrix; SpriteBatch batch; Texture2D explosion; Vector2 explosionPos; public Game1() { graphics = new GraphicsDeviceManager ( this ); content = new ContentManager (Services); oldState = Keyboard .GetState(); } protected override void Initialize() { base .Initialize(); } // Specify the 3D model to draw. Model myModel; // The aspect ratio determines how to scale 3d to 2d projection. float aspectRatio; private Texture2D Explosion; private SpriteBatch ForegroundBatch; private Rectangle TitleSafe; protected override void LoadGraphicsContent( bool loadAllContent) { if (loadAllContent) { myModel = content.Load< Model >( "Content\\Models\\p1_wedge" ); ForegroundBatch = new SpriteBatch (graphics.GraphicsDevice); //////////////// Explosion = content.Load< Texture2D >( "Sprite1" ); ///////////////////// } aspectRatio = graphics.GraphicsDevice.Viewport.Width / graphics.GraphicsDevice.Viewport.Height; graphics.GraphicsDevice.RenderState.DepthBufferEnable = true ; graphics.GraphicsDevice.RenderState.CullMode = CullMode .None; TitleSafe = GetTitleSafeArea(.8f); //////////////////////////////// } protected override void UnloadGraphicsContent( bool unloadAllContent) { if (unloadAllContent == true ) { content.Unload(); } } // Set the velocity of the model, applied each frame to the model's position. Vector3 modelVelocity = Vector3 .Zero; protected override void Update( GameTime gameTime) { if ( GamePad .GetState( PlayerIndex .One).Buttons.Back == ButtonState .Pressed) this .Exit(); // Get some input. UpdateInput(); // Add velocity to the current position. modelPosition += modelVelocity; base .Update(gameTime); // Bleed off velocity over time. modelVelocity *= 0.95f; UpdateInput(); // Create a total bounding sphere for the mesh BoundingSphere totalbounds = new BoundingSphere (); foreach ( ModelMesh mesh in myModel.Meshes) { totalbounds = BoundingSphere .CreateMerged(totalbounds, mesh.BoundingSphere); } Vector2 explosionpos; // Project the center of the 3D object to the screen, and center the // sprite there Vector3 center = modelPosition; explosionpos.X = center.X; explosionpos.Y = center.Y; // Create a bounding box from the bounding sphere, and find the corner // that is farthest away from the center using Project BoundingBox extents = BoundingBox .CreateFromSphere(totalbounds); float maxdistance = 0; float distance; Vector3 screencorner; foreach ( Vector3 corner in extents.GetCorners()) { screencorner = graphics.GraphicsDevice.Viewport.Project(corner, projectionMatrix, cameraPosition.ViewMatrix, Matrix .Identity); distance = Vector3 .Distance(screencorner, center); if (distance > maxdistance) maxdistance = distance; } base .Update(gameTime); } protected Rectangle GetTitleSafeArea( float percent) { Rectangle retval = new Rectangle (graphics.GraphicsDevice.Viewport.X, graphics.GraphicsDevice.Viewport.Y, graphics.GraphicsDevice.Viewport.Width, graphics.GraphicsDevice.Viewport.Height); #if XBOX // Find Title Safe area of Xbox 360. float border = (1 - percent) / 2; retval.X = (int)(border * retval.Width); retval.Y = (int)(border * retval.Height); retval.Width = (int)(percent * retval.Width); retval.Height = (int)(percent * retval.Height); return retval; #else return retval; #endif } protected void UpdateInput() { KeyboardState newState = Keyboard .GetState(); Vector3 modelVelocityAdd = Vector3 .Zero; modelVelocityAdd.X = -( float ) Math .Sin(modelRotation); modelVelocityAdd.Z = -( float ) Math .Cos(modelRotation); if (newState.IsKeyDown( Keys .A)) { modelRotation += 0.1f; //modelRotationZ = 0.1f; modelRotationX = 0.1f; } else { modelRotationX = 0f; } // Otherwise, check to see whether it was down before. // (and therefore just released) if (newState.IsKeyDown( Keys .D)) { modelRotation -= 0.1f; //modelRotationZ = -0.1f; modelRotationZ = 0.1f; } else { modelRotationZ = 0f; } if (newState.IsKeyDown( Keys .W)) { modelVelocity += modelVelocityAdd; } // Otherwise, check to see whether it was down before. // (and therefore just released) else if (oldState.IsKeyDown( Keys .S)) { modelPosition = Vector3 .Zero; modelVelocity = Vector3 .Zero; modelRotation = 0f; } if (newState.IsKeyDown( Keys .Space)) { } oldState = newState; } // Set the position of the model in world space, and set the rotation. //Vector3 modelPosition = Vector3.Zero; Vector3 modelPosition = Vector3 .Zero; //float modelRotation = 0.0f; float modelRotation = 0.0f; float cameraRotation = 90.0f; ////////////////////////////////////////////////////////////// float modelRotationX = 0.0f; float modelRotationZ = 0.0f; // Set the position of the Camera in world space, for our view matrix. Vector3 cameraPosition = new Vector3 (0.0f, 0.0f, -18000.0f); protected override void Draw( GameTime gameTime) { graphics.GraphicsDevice.Clear( Color .CornflowerBlue); // Copy any parent transforms. Matrix [] transforms = new Matrix [myModel.Bones.Count]; myModel.CopyAbsoluteBoneTransformsTo(transforms); graphics.GraphicsDevice.Clear( Color .CornflowerBlue); base .Draw(gameTime); // Draw the model. A model can have multiple meshes, so loop. foreach ( ModelMesh mesh in myModel.Meshes) { // This is where the mesh orientation is set, as well as our camera and projection. foreach ( BasicEffect effect in mesh.Effects) { effect.EnableDefaultLighting(); effect.World = transforms[mesh.ParentBone.Index] * Matrix .CreateRotationY(modelRotation) * Matrix .CreateRotationX(modelRotationX) * Matrix .CreateRotationZ(modelRotationZ) * Matrix .CreateTranslation(modelPosition); effect.View = Matrix .CreateLookAt(cameraPosition, Vector3 .Zero, Vector3 .Up); effect.Projection = Matrix .CreatePerspectiveFieldOfView( MathHelper .PiOver4, aspectRatio, 1.0f, 100000.0f); effect.View = cameraPosition.ViewMatrix; effect.Projection = projectionMatrix; effect.View = Matrix .CreateRotationX(cameraRotation) * Matrix .CreateTranslation(cameraPosition); //////////////////////////////////////////////////////// //viewMatrix = viewMatrix = Matrix.CreateLookAt(new Vector3(0, 0, 30), new Vector3(0, 0, 0), new Vector3(0, 1, 0)); //viewMatrix = Matrix.CreateLookAt(new Vector3(0, -2, 5), new Vector3(2, 1, 0), new Vector3(0, 0, 1)); //effect.View = Matrix.CreatePerspectiveFieldOfView(MathHelper.PiOver4, aspectRatio, 1.0f, 10000.0f);//this.Window.ClientBounds.Width / this.Window.ClientBounds.Height, 0.2f, 500.0f); //////////////////////////////////sprite draw method//////////////////////////// //ForegroundBatch.Begin(); //Vector2 pos = new Vector2(TitleSafe.Left, TitleSafe.Top); // ForegroundBatch.Draw(Explosion, pos, Color.White); //ForegroundBatch.End(); // base.Draw(gameTime); } // Draw the mesh, using the effects set above. mesh.Draw(); } batch.Begin( SpriteBlendMode .AlphaBlend, SpriteSortMode .Deferred, SaveStateMode .SaveState); ForegroundBatch.Draw(explosion, explosionPos, Color .White); ForegroundBatch.End(); //explosion.DrawFrame(batch, explosionpos); batch.End(); base .Draw(gameTime); } } public class AnimatedTexture { private int framecount; private Texture2D myTexture; private float TimePerFrame; private int Frame; private float TotalElapsed; private bool Paused; public float Rotation, Scale, Depth; public Vector2 Origin; public AnimatedTexture( Vector2 Origin, float Rotation, float Scale, float Depth) { this .Origin = Origin; this .Rotation = Rotation; this .Scale = Scale; this .Depth = Depth; } public void Load( GraphicsDevice device, ContentManager content, string asset, int FrameCount, int FramesPerSec) { framecount = FrameCount; myTexture = content.Load< Texture2D >(asset); TimePerFrame = ( float )1 / FramesPerSec; Frame = 0; TotalElapsed = 0; Paused = false ; } // class AnimatedTexture public void UpdateFrame( float elapsed) { if (Paused) return ; TotalElapsed += elapsed; if (TotalElapsed > TimePerFrame) { Frame++; // Keep the Frame between 0 and the total frames, minus one. Frame = Frame % framecount; TotalElapsed -= TimePerFrame; } } // class AnimatedTexture public void DrawFrame( SpriteBatch Batch, Vector2 screenpos) { DrawFrame(Batch, Frame, screenpos); } public void DrawFrame( SpriteBatch Batch, int Frame, Vector2 screenpos) { int FrameWidth = myTexture.Width / framecount; Rectangle sourcerect = new Rectangle (FrameWidth * Frame, 0, FrameWidth, myTexture.Height); Batch.Draw(myTexture, screenpos, sourcerect, Color .White, Rotation, Origin, Scale, SpriteEffects .None, Depth); } public bool IsPaused { get { return Paused; } } public void Reset() { Frame = 0; TotalElapsed = 0f; } public void Stop() { Pause(); Reset(); } public void Play() { Paused = false ; } public void Pause() { Paused = true ; } } Tag: XNA sample code problem ?
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    - How to get Angle from Thumbstick? Is there a way to get the angle from the thumbsticks of a XBOX360 controller If up return 0, right 90, down 180, left 270. this is how I crudely did it: if (currentGamePadState.ThumbSticks.Right.X != 0 || currentGamePadState.ThumbSticks.Right.Y != 0) { if (projectileTime == 0) { Vector2 vel = new Vector2(400, 0); float rad = 0; if (currentGamePadState.ThumbSticks.Right.Y == 0) { if (currentGamePadState.ThumbSticks.Right.X > 0) { vel = new Vector2(400, 0); } else { vel = new Vector2(-400, 0); } } else if (currentGamePadState.ThumbSticks.Right.X == 0) { if (currentGamePadState.ThumbSticks.Right.Y > 0) { vel = new Vector2(0, -400); } else { vel = new Vector2(0, 400); } } else { if (currentGamePadState.ThumbSticks.Right.X > 0) { rad = (float)Math.Atan((double)currentGamePadState.ThumbSticks.Right.Y / currentGamePadState.ThumbSticks.Right.X); vel = new Vector2((float)Math.Cos(rad) * 400, (float)Math.Sin(rad) * -400); } else { rad = (float)Math.Atan((double)currentGamePadState.ThumbSticks.Right.Y / currentGamePadState.ThumbSticks.Right.X); vel = new Vector2((float)Math.Cos(rad) * -400, (float)Math.Sin(rad) * 400); } } ProjectileManager.AddProjectile(Game1.Players[0].playerSprite.Position, vel, Color.Red); projectileTime = 200; } Tag: XNA sample code problem ?
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    - Publishing I've noticed that when try the install for a game on any computer but my own, it doesn't work. I had all 3 of the files that it produces on the floppy, but it still didn't work. All of the other computers had the 2.0 service update, but it still didn't work. Do they have to have XNA to Tag: XNA sample code problem ?
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    - New XNA Game: Warriors of the Shining Star. I just wanted to see what people thought of the game I��m working on with XNA. I��ve been posting updates to my blog if you are interested. Right now I only have movies on the site; hopefully I��ll get a demo up in the next couple of weeks. http://www.stressedgamer.blogspot.com/ -tom Tag: XNA sample code problem ?
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    - loading textures on array Hi i am making a simple pool game and have my balls in an array (each ball runs through a class to set the properties. i have a Texture2D property to set the texture so i can set the white ball colour and yellow and red ball colour. however i have set up the array and try to draw but it will not accept the array property as a texture it keeps saying it is of null value even though i have set each of the balls here is the code below as you may understand a little more. //ball class for each ball public class balls { public Texture2D tex; public float x; public float y; public Vector2 v = new Vector2 (); public float r = 12.5f; public float m = 10; } //array of balls balls [] pBalls = new balls [] { new balls (), new balls (), new balls (), new balls (), new balls (), new balls (), new balls (), new balls (), new balls (), new balls (), new balls (), new balls (), new balls (), new balls (), new balls (), new balls (), new balls ()}; //setting the ball sprite batch and texture for a red ball sBalls = new SpriteBatch ( this .graphics.GraphicsDevice); ContentManager BallsLoader = new ContentManager (Services); tBalls = BallsLoader.Load< Texture2D >( "RedAlpha" ) as Texture2D ; pBalls[0].tex = tWBall; for ( int i = 1; i < 16; i++) { pBalls[ i].tex = tBalls;//space there for forum use only } tWBall is white ball same code as above but whit texture and different variable names where needed. //sprite batch for balls b.tex is the texture that is set but this is where the error keeps showing foreach ( balls b in pBalls) { sBalls.Begin( SpriteBlendMode .AlphaBlend); sBalls.Draw(b.tex, new Rectangle (( int )b.x, ( int )b.y, 25, 25), Color .White); sBalls.End(); }i hope the code is clear enough for you all. if you have any questions or would like the full cs code file let me know and i will send it to you. Regards Mark Tag: XNA sample code problem ?
  - 9
    - XNA's use of Collections XNA uses Collections for a lot of things: ModelMeshCollection, ModelEffectCollection, EffectPassCollection, ModelMeshPartCollection, etc. which results in a lot of foreach iteration in code. I recently discovered the CLR Profiler and started poking around. It appears that using foreach on these Collections results in creation of SZArrayHelper and Enumerator helper objects. Most other systems are doing pretty well to avoid any constant object "leakage", and I'd rather keep it that way if possible (I come from the "No Dynamic Allocations at Runtime" school of console development). I'm still pretty new to C#, so what I'm wondering is if there are there ways to avoid this constant pressure on the GC -beyond hand unrolling the loops (in turn binding code to data), or rolling my own model classes, etc.. Tag: XNA sample code problem ?
  - 10
    - The future of 3D grahics programming with managed code (Microsoft technology) Hi! I would like to ask some information about the future of 3D graphics programming with the managed code. Yesterday, I came across an article where I read that Microsoft(MS) will stop the developoment of DirectX with the managed code, with the managed code I mean C#, Whidbey C++ and VB. The question I have in my mind is : "What's next ". I have been developing numerical simulators during the last two years. My preffered language is (Managed)C++. The reason I chose Managed C++ is that - I thought that - I can use the MS technology in other parts of the developement, in addition I develop a code which is consistent with the C++ norms, altough Whidbey C++ is violing the traditional C++ syntax - I would not predict this two years ago when I started with my project. I started to develop the "visual" part with C# DirectX. Now I am coding "it" with Managed C++ and I intend to finish it during the summer. The graphical presentation of results and interactive data entrance are the essential parts of my program. If MS stops the development of the DirectX with the managed code, the code I develop will have a limited time of existence because the graphics is streed by DirectX, thus interaction between the graphics and the main code will come to stop. You see as a developer you have to make a decision at the end of the day whether you are willing to put more efforts to maintain the MS' technology or you're going to choose a "less" painless alternative. That is, I am considering to choose a platform independent solution with OpenGL because I can spend less effort to maintain my code in stead of following MS' technology. However, I do not want to completely cut the MS technology either. That is the dilemma I have now. My information related to DirectX10 or "longhorn" is very limited right now so I do not know what kind of programming language they are using there. I appreciate for your recommendations and suggestions for the future development of my code. Regards, M. Tag: XNA sample code problem ?
  - 11
    - Anyone to test an Octtree based space game? I have a good (I think) version of an Octtree based scene management system. It needs more testing. I have built an Outerspace Game for testing......it needs other things built into it. Right now, there's a space station and 150 ateroid fields and a 3D starfield that you can fly around in. It needs spacecraft, other interesting stuff, like a mother ship. I would like to give the "Loose" Octtree and better test. Here's how it works: The entire space (within the game) is a cube (big sector) that is then divided up into 8 cubes (nodes, sectors) that is the divided into 8 cubes....and so on until a manageable size. Models and Game components can be added to the octree. It finds what node (according to position) that the object goes into. This is the scene management part. It seems to work really well. It culls out the nodes(sectors,cubes) that fail the visibility test. NOW, the "LOOSE" part is that if an object's bounding sphere extends beyond the boundry of the node (cube) that it is assigned to based on it's position, then the clipping Bounding Box that determines visibility (based on the viewing frustum) is expanded to encompass the object (and all other objects in the node based on position). The original bounding box used to test which nodes (sector,etc..) it fits in is not modified. If an object is removed, or it's position changes such that it no longer belongs in the node it is in, then the Frustm cull bounding box for that node can shrink if it is one of the offenders that caused it to grow..... So......A Huge spaceship (MOTHER SHIP) while traveling should cause the view bounding box to grow, but the actual bounding volume does not. Once the Huge ship's position is outside the bounding volume of the node, it will land in another node and it will grow while the old node shrinks back. Long, story, but..............................I'll put the files for download on FileFront, no codeplex project yet :(, if someone wants to test it out.....maybe even make a cool game using it. Tag: XNA sample code problem ?
  - 12
    - MDX 9.0 under Vista Hi all, simple question that I can��t seem to find an answer for: Will MDX 9.0 run under Vista Not bothered if it comes pre installed, just if runs OK Thanks Tag: XNA sample code problem ?
  - 13
    - .xnb files are huge Hi! Our 2D game is getting huge because of the non-compressed .xnb files all our graphic are stored as by XNA. A single background image in 1280x720 pixels is using 3,5 MB ! What can you do to get file sizes for graphics down Tag: XNA sample code problem ?
  - 14
    - Is my normal code wrong? I've used it on a few models and all the time the results are dire. even on a flat patch. i know its the normal code cos if I manually input good normals it looks fine. Can you see any way i can improve this or better yet, a link to a xna demo with normal generation code And sorry for so many threads, having too much fun with xna. public void CalculateNormals() { float [] Face_NX = new float [ this .Triangles]; float [] Face_NY = new float [ this .Triangles]; float [] Face_NZ = new float [ this .Triangles]; int [] Vertex_ConnectedTris = new int [ this .Vertices]; int [,] Vertex_TriList = new int [ this .Vertices, 128]; int TriCount = this .Triangles; for ( int Loop_Tris = 0; Loop_Tris < TriCount; Loop_Tris++) { int Vertex_0, Vertex_1, Vertex_2; Vertex_0 = TriangleVertex(Loop_Tris, 0); Vertex_1 = TriangleVertex(Loop_Tris, 1); Vertex_2 = TriangleVertex(Loop_Tris, 2); int ConnectedTris = 0; ConnectedTris = Vertex_ConnectedTris[Vertex_0]; Vertex_TriList[Vertex_0, ConnectedTris] = Loop_Tris; Vertex_ConnectedTris[Vertex_0] = ConnectedTris + 1; ConnectedTris = Vertex_ConnectedTris[Vertex_1]; Vertex_TriList[Vertex_1, ConnectedTris] = Loop_Tris; Vertex_ConnectedTris[Vertex_1] = ConnectedTris + 1; ConnectedTris = Vertex_ConnectedTris[Vertex_2]; Vertex_TriList[Vertex_2, ConnectedTris] = Loop_Tris; Vertex_ConnectedTris[Vertex_2] = ConnectedTris + 1; float Ax = VertexX(Vertex_0); float Ay = VertexY(Vertex_0); float Az = VertexZ(Vertex_0); float Bx = VertexX(Vertex_1); float By = VertexY(Vertex_1); float Bz = VertexZ(Vertex_1); float Cx = VertexX(Vertex_2); float Cy = VertexY(Vertex_2); float Cz = VertexZ(Vertex_2); float Px = Ax - Bx; float Py = Ay - By; float Pz = Az - Bz; float Qx = Bx - Cx; float Qy = By - Cy; float Qz = Bz - Cz; float Nx = Py * Qz - Pz * Qy; float Ny = Pz * Qx - Px * Qz; float Nz = Px * Qy - Py * Qx; float mag = ( float ) Math .Sqrt(Nx * Nx + Ny * Ny + Nz * Nz); Nx = Nx / mag; Ny = Ny / mag; Nz = Nz / mag; Face_NX[Loop_Tris] = Nx; Face_NY[Loop_Tris] = Ny; Face_NZ[Loop_Tris] = Nz; } int VertCount = this .Vertices; for ( int LOOP_Vertices = 0; LOOP_Vertices < VertCount; LOOP_Vertices++) { float Nx = 0; float Ny = 0; float Nz = 0; int Polys = Vertex_ConnectedTris[LOOP_Vertices]; for ( int LOOP_Polys = 0; LOOP_Polys < Polys; LOOP_Polys++) { int ThisPoly = Vertex_TriList[LOOP_Vertices, LOOP_Polys]; Nx = Nx + Face_NX[ThisPoly]; Ny = Ny + Face_NY[ThisPoly]; Nz = Nz + Face_NZ[ThisPoly]; } float Nl = ( float ) Math .Sqrt(Nx * Nx + Ny * Ny + Nz * Nz); if (Nl < 0.1) Nl = 1; Nx = Nx / Nl; Ny = Ny / Nl; Nz = Nz / Nl; Debug .WriteLine( "X:" + Nx + " Y:" + Ny + " Nz:" + Nz); VertexList[LOOP_Vertices].Normal = new Vector3 (Nx, Ny, Nz); } } Tag: XNA sample code problem ?
  - 15
    - Meshes, Material and Light Hi guys, i'm currently trying to get started with my first serious approach in getting something to work in XNA ;) It will be a ball game and it is called xMinton for now. Many things are done, setting up many classes and the usual stuff. While i was working there were more and more questions coming up. I was able to solve some of them on my own, some of them are those i want to ask you genius folks now. Tag: XNA sample code problem ?
  - 16
    - Could C# be the future of gaming? Since XNA is using C#, and is is a more intuitive language than C++, is it possible that in the future that C# will dominate, espessially in AAA titles. Could XNA be ushering a new way of programming in the main stream Tag: XNA sample code problem ?

brian_tsim

Hi all,

i finded xna "XNA Onscreen Keyboard Component" sample in internet(http://www.xnaresources.com/pages.asp pageid=27). What does the iFontAsciiStart and iFontAsciiEnd mean in function WriteText () Please somebody help. Below is the function coding.

public void WriteText(SpriteBatch spriteBatch, string sTextOut, int x, int y, Color colorTint)
{
// Very simple text output method. Uses a mono-spaced font to keep things easy
int iFontX = 0;
int iFontY = 0;
int iFontHeight = 30;
int iFontWidth = 19;
int iFontAsciiStart = 32;
int iFontAsciiEnd = 126;
int iOutChar;
for (int i = 0; i < sTextOut.Length; i++)
{
iOutChar = (int)sTextOut Idea ;
if ((iOutChar >= iFontAsciiStart) & (iOutChar <= iFontAsciiEnd))
{
spriteBatch.Draw( t2dFont,
new Rectangle( x + (iFontWidth * i), y, iFontWidth-1, iFontHeight),
new Rectangle( iFontX + ((iOutChar - iFontAsciiStart) * iFontWidth),
iFontY, iFontWidth-1, iFontHeight),
colorTint
);
}
}
}

Best Regrads,

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Re: XNA sample code problem ?

The ZMan

Moved to XNA forum but you should try reposting in the new forums http://creators.xna.com

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Re: XNA sample code problem ?

Jim Perry

brian_tsim wrote:
What does the iFontAsciiStart and iFontAsciiEnd mean in function WriteText ()

This is ensuring that the character being rendered is one that can actually be rendered. Only certain characters can be rendered - A-Z, 1-0, etc. Special characters cannot be rendered with the code.

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