Ball Collison for pool/ collision

XNA Framework

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    - A tool to help with Sprite Animations: Sprite Strip Composer Wayward: Thanks for your interesting comments. I will add your suggestions to the next release. Regards: John Harding Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Fog? It uses BasicEffect, I already looked :) I don't use BasicEffect. Tag: XNA Framework Ball Collison for pool/ collision 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: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - 360 Dev do's and don'ts If you would first look for infos by yourself, then you would know that there are just few main rules: -minimize GC calls by making objects live... watch out, when operating on collections as some could generate short living garbage(most known "foreach problem"). -And, as already said, sometimes not everything would be drawed, so you should oversee it - let user adjust screen size, or draw UI in safe screen. -He, I hope I don't have to say - xboxs usually don't have keyboards and mouses. Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Mesh Display Not Symmetrical Bad Habit, That is exactly what I thought initially. In fact, the ellipsoid can be rendered a perfect sphere by calling, D3DXMatrixScaling, and setting the vector values to compensate, then calling D3DXMatrixMultiply and setting this as IDIRECT3DDEVICE9->SetTransform (D3DTS_WORLD). However, I have textured the sphere using code that I stole from Robert Dunlop's DirectX website: Direct3D Articles, The X-Zone, Robert Dunlop . // This structure declaration taken from: Robert Dunlop, Spherical Texture Mapping. typedef struct _VERTEX { D3DXVECTOR3 pos ; D3DXVECTOR3 norm ; float tu ; float tv ; } VERTEX, *LPVERTEX ; // Calculate texture coordinates for SphereMesh, using the normal of esch vertex. LPVERTEX pVertices ; SphereMesh->LockVertexBuffer (0, (LPVOID*) &pVertices) ; for (DWORD i = 0 ; i < SphrNumVertices ; i++) { pVertices->tu = asinf(pVertices->norm.x)/D3DX_PI + 0.5f ; pVertices->tv = asinf(pVertices->norm.y)/D3DX_PI + 0.5f ; pVertices++ ; } SphereMesh->UnlockVertexBuffer () ; I'm leaving out alot of the SetRenderState calls, and the CloneMesh call. When the sphere is rendered onto the screen, (I use the Earth Image texture from the BumpEarth Sample in the DirectX9 SDK), the texture looks just like the Rendered sphere in the BumpEarth sample, except that at the extreme X coordinate (far left and far right, in the viewing perspective), the texture appearance is ballooned into a grotesque ringed convex or concave aberration of the bitmap image. And, I rotate this textured sphere, so I can see the entire surface. As I said in my original post, my application does a number of other rendering operations, and everything works fine. None of this code is anything imaginative, I just copied and pasted most of it from the SDK samples, changing values as necessary. Here is the World, View, and Projection Matrix set-up code: LPDIRECT3DDEVICE9 pIDirect3D9Grphcs ; D3DXMATRIXA16 MtrxWorld ; D3DXMATRIXA16 MtrxView ; D3DXMATRIXA16 MtrxProj ; D3DSURFACE_DESC DescripBckBuf ; D3DSURFACE_DESC DescrpRendTarg ; LPDIRECT3DSURFACE9 lpBackBuffer = NULL ; pIDirect3D9Grphcs->GetBackBuffer (0, 0, D3DBACKBUFFER_TYPE_MONO, &lpBackBuffer) ; lpBackBuffer->GetDesc (&DescripBckBuf) ; AspectRatio = DescripBckBuf.Width / DescripBckBuf.Height ; D3DXMatrixIdentity (&MtrxWorld) ; D3DXMatrixRotationY (&MtrxWorld, D3DXToRadian (AngleVal)) ; // Introduced D3DXMatrixScaling to correct ellipsoid display of sphere. // D3DXMATRIXA16 ScaledMtrx ; // D3DXMatrixScaling (&ScaledMtrx, 0.75f, 1.0f, 0.75f) ; // D3DXMatrixMultiply (&MtrxWorld, &MtrxWorld, &ScaledMtrx) ; pIDirect3D9Grphcs->SetTransform (D3DTS_WORLD, &MtrxWorld) ; D3DXMatrixLookAtLH (&MtrxView, &D3DXVECTOR3 (0.0f, 0.0f, -6.0f), &D3DXVECTOR3 (0.0f, 0.0f, 0.0f), // Look At the origin &D3DXVECTOR3 (0.0f, 1.0f, 0.0f)) ; // defines "up" pIDirect3D9Grphcs->SetTransform (D3DTS_VIEW, &MtrxView) ; D3DXMatrixPerspectiveFovLH (&MtrxProj, D3DX_PI * 0.25f, AspectRatio, 1.0f, 100.0f) ; pIDirect3D9Grphcs->SetTransform (D3DTS_PROJECTION, &MtrxProj) ; I call a function repeatedly using this code, and incrementing AngleVal (which is a DWORD) by one each time, and the textured (unlit) sphere rotates with the hideous texture aberration as an ellipsoid (unless I uncomment the D3DXMatrixScaling code, and then I see a sphere with the same hideous texture aberration as before). Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Setting project up to be cross platform This is like #1 for me right now. Development goes a lot faster staying on the PC. Plus the xbox on my desk makes noise. . . I'm looking at sharing code via assemblies now. Platform-specific stub projects with the bulk of the code in a shared assembly is certainly an acceptable work-around for me. Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Animated Sprite - the MSDN example Also note that there is a bug in the article. The line: Frame = Frame % (framecount - 1); should be: Frame = Frame % framecount; With the "- 1", if framecount is 4, then you would get a value between 0 and 2, not the desired 0 and 3. Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Responding To Graphics Device Events I found the following forum post that might address your problem: http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=1050454&SiteId=1 Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Microsoft C# Not C# express In relation to GSE and XNA there are no real features that you actually need, you will find that the options missing are generally the wizards and the ability to perform remote database connections. The only real downfall is the linked source control in the pro versions, it would be nice to have it included in GSE. And there is also the class designer... Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Install XNA games on another computer? You should be able to run it by just installing the XNA Framework Redistributable, I don't think you need to install all of GSE for it to work. Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Japanese Document for DirectX in future? It seems that after DX9, there's no offcial Japanese Document released by Microsoft Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - C# and how it works with XNA Excellent, thats the answer I'm looking for. Thats pretty cool that there coming up with a book for the XNA stuff. Thanks for the info man. Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Texture2D.GetData fails on 500x500 texture Argh, thats really the solution, if its a power of 2 it works 512x512 for example, sorry for this stupid question, i had never thought that it could be such a .... thing. Is there any good reason for that Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Tint programatically a Texture2D with another Texture2D If this is a 3D application, you should be able to do it pretty easily using a custom shader, loading the texture dynamically. If it's a 2D application, I think I'd just have more than one copy of the sprite texture already mapped with the different grains. Bill Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Game studio Express particle system? I have sen this one before and was considering building an entire particle system manager off of it's design. I just wanted to make sure there are no systems out there I could use in order for me to save time. Generally I would like to be able to use simple text files to generate the particle system to save time on compiling. Similar to the way OGRE does it. Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Shader states, etc? (HLSL effects not working right) Unfortunately that didn't work :( I was thinking it might be some divide by zero error, as I noticed that a lot of weird things happen when the video card executes stuff like that and gets NaN's, but I couldn't figure out where it would be coming from (and my pixel shader assembly skills aren't good enough to debug through the PIX disassembly). Yeah, I wrote a .tri loader and a .blue loader - my hope is to get it converting the .blue shaders in to HLSL. It's nice because I can just add a .blue to my project and the content pipeline spits out a Model, an Effect, and a bunch of embedded Textures :) Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Free-moving camera? Ah, thanks a ton. Should work flawlessly :) Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Conecting my computer to Xbox 360 Posted too soon, sorry. I meant to also include this link , since it has images and troubleshooting tips toward the end of the page. Note that the most common problem is that you entered the key incorrectly while entering the connection settings in the Visual C# IDE. Please try creating a new key and re-entering. Some characters are hard to tell apart, particularly I and 1, and especially on standard-definition TVs. If you enter the wrong code, the connection attempt will time-out. Several other people have had to try two or three times to get it right. --Stephen Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Will we be able to shared compiled versions of XNA apps? I agree with Jim, you only need to supply the source for x360 games. With windows games you are able to package your applications. Note that with c# express and the other express packages you are only able to use the click once deployment method, if you wish to build full install packages you will need to use a third party installer or use the binaries only inside a VS Pro install project. You are able to though just add the binaries and content files into a copressed (Zip) file and publish those. Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Timing gamePad button, trigger and thumbsticks Excellent, cheers for that mate. I've slightly adapted your timing code by splitting the task between the Update and UpdateInput methods. For some reason this seemed to work better. I've aslo put a Console.LineWrite in there so peeps can see if its all working as its supposed to. Code Snippet System.TimeSpan buttonStartTimePress; System.TimeSpan buttonTotalTimePress; bool buttonPress; bool previousButtonPress; protected override void Update(GameTime gameTime) { // Allows the default game to exit on Xbox 360 and Windows if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed) this.Exit(); UpdateInput(); if (buttonPress != previousButtonPress) { if (buttonPress) // Start recording the time. buttonStartTimePress = gameTime.TotalGameTime; else { // Finsh recording the time. buttonTotalTimePress = gameTime.TotalGameTime - buttonStartTimePress; Console.WriteLine(buttonTotalTimePress); } previousButtonPress = buttonPress; } base.Update(gameTime); } GamePadState previousGamePadState; void UpdateInput() { // Check the current state of Player One. GamePadState currentState = GamePad.GetState(PlayerIndex.One); // Process input only if connected and if the packet numbers differ. if ((currentState.IsConnected) && (currentState.PacketNumber != previousGamePadState.PacketNumber)) { if (currentState.Buttons.A == ButtonState.Pressed && previousGamePadState.Buttons.A == ButtonState.Released) { // Button A has just been pressed. GamePad.SetVibration(PlayerIndex.One, 1.0f, 1.0f); buttonPress = true; } else if (currentState.Buttons.A == ButtonState.Released && previousGamePadState.Buttons.A == ButtonState.Pressed) { // Button A has just been released. GamePad.SetVibration(PlayerIndex.One, 0.0f, 0.0f); buttonPress = false; } // When finished with differences, update PreviousGamePadState. previousGamePadState = currentState; } } Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - In-Game Collision Detection I have seen this article before, as well as downloaded the source code for it, but this is only for 2D Sprite collision detection - what I need is 3D mathematical collision, such as when a BoundingSphere intersects a plane, but only within a certain triangle (the triangle collision is being tested against). And not only do I need to know whether or not there's a collision, I need to know specific angles so the player will 'slide' along the wall if approaching it at an angle - sort of like in Half-Life 2 for you Steam fans (I'm one too!). Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Need help - disappearing lines and solids! I suppose it does; I apologise as I am fairly new to this. What i am trying to do is draw an object like this: http://temp.jw.id.au/tristrip.jpg The top one is at full size, the bottom one is as far as I can zoom out before it disappears. I need it to stay visible (without any gaps between the triangles) even if i zoom out even further. All the drawing will be done on the same Z-plane. Is there some other way i should be doing this Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Bug in Mouse.SetPosition This situation only occurs when you have two monitors connected to the same computer After you deactivate and then activate a full screen game the Mouse.SetPosition() command doesn't work properly. That is, the command sets the mouse to a different position to what Mouse.GetState() returns (See Below). This is very annoying, especially when it comes to debugging Mouse .SetPosition(_screen._game.Window.ClientBounds.Width / 2, _screen._game.Window.ClientBounds.Height / 2); MouseState ms = Mouse .GetState(); if (ms.X != _screen._game.Window.ClientBounds.Width / 2 || ms.Y != _screen._game.Window.ClientBounds.Height / 2) { Console .WriteLine( "Ahhh!" ); } Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - How to create a Hight Precision Timer on Xbox You could use a StopWatch, or (better) you could use the parameters on the Game object to control how fast your Update tick runs. Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - XBox has died how do I go about transferring my creators club etc. to the new unit when it arrives? I haven't tried this myself, but hopefully all your arcade games are also tied to your gamer profile. You should just be able to re-download them when the new one arrives. Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Collision Detection With Bezier Curves I think this method might be too slow, and how would the MoveAway() method know which direction to move and how much One way could be to calculate a unit vector pointing away from the terrain and then work out how much the player would need to be moved along that vector to get out of the terrain. If you looped through adding or subtracting until it isn't colliding, that would leave how fast you would get the player out of the terrain up to chance. I don't think I can do that since the "if the two lines are intersecting" statement is inside 4 nested for loops . Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Cannot run Release build, crash... What do you mean "noether of them run" What happens when you try to run them Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - The Unofficial "Hooray I'm Done With my DBP Game" Thread Catalin, I can't wait to see your game, you do great work. I was up until 3 last night, and then I didn't sleep well. My game is called "Spacewar: Mission Pegasus" and is a 2.5D scroller. Bill Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - low fps here is my draw func protected override void Draw( GameTime gameTime) { VertexPositionColor [] axes = new VertexPositionColor ; axes[1] = new VertexPositionColor ( new Vector3 (100, 0, 0), Color .Red); axes[3] = new VertexPositionColor ( new Vector3 (0, 100, 0), Color .Green); axes[5] = new VertexPositionColor ( new Vector3 (0, 0, 100), Color .BlueViolet); basicEffect.View = mainCamera.ViewMatrix; basicEffect.Texture = tz[0]; basicEffect.Begin(); foreach ( EffectPass pass in basicEffect.CurrentTechnique.Passes) { pass.Begin(); graphics.GraphicsDevice.VertexDeclaration = decl1; graphics.GraphicsDevice.DrawUserPrimitives< VertexPositionColor >( PrimitiveType .LineList, axes, 0, 3); graphics.GraphicsDevice.VertexDeclaration = decl; graphics.GraphicsDevice.Vertices[0].SetSource(vb, 0, VertexPositionTexture .SizeInBytes); graphics.GraphicsDevice.Indices = ib; graphics.GraphicsDevice.DrawIndexedPrimitives( PrimitiveType .TriangleList, 0, 0, lz * 4, 0, lz * 2); pass.End(); } basicEffect.End(); base .Draw(gameTime); DrawFps(); } where lz is 100 vb = new VertexBuffer (graphics.GraphicsDevice, VertexPositionTexture .SizeInBytes * lz * 4, ResourceUsage .None); vb.SetData< VertexPositionTexture >(pz); ib = new IndexBuffer (graphics.GraphicsDevice, sizeof ( int ) * lz * 6, ResourceUsage .None, IndexElementSize .ThirtyTwoBits); ib.SetData< int >(idz); setuped earlier in loadgraphicscontent Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Microsoft's future policy for redistributing Xbox 360 games? I don't know if running on xbox 360 is essential to your idea, if not, you can always work on the Windows version. Although that has some hardware requirements which your students/lab may not have. I also wish MS would clarify the distribution strategy. Sure, you can zip up the source and pass it out like candies. But no one can run it unless they plop down $100 for Creator Club membership. Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Trying to pass a cubemap.dds to a fx shader Darkside, Thanks for taking the time to have a look and respond. If I replace Environment with a texture parameter then I get a compile error as the lerp function needs it to be a float4. If I don't load the parameter and hard code the texture location this does not work either, pluss this would be *** as I would want to change the environment of my reflected model as it moved from scene to scene. Surly this should just work as the shader is part of a MSDN tutoral and I would have thought that the XNA development team would not leave out cube maps :) I just cant for the life of me see why it is not working... If you have any other ideas I am all ears :) Thanks in advance :) Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.
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    - Efficiency of Threads on the 360? Peter D. wrote: To use the threads you simply need to set a thread processor affinity. this does nothing on the PC Is this true on multi core PC cpus Tag: XNA Framework Ball Collison for pool/ collision Game Technologies: DirectX, XNA, XACT, etc.

MB-86

hi, ive been making a pool/ billards game in xna in the past weeks and i am having trouble with the collison. im currently using boundingsphere's and they work when the white ball hits but when the ball comes back at it, it stops moving.

Any Help

Re: XNA Framework Ball Collison for pool/ collision

Michael Morton

http://www.gamasutra.com/features/20000516/lander_01.htm

You will need to log in to access this article however it covers pool physics :)

Re: XNA Framework Ball Collison for pool/ collision

Dr.9

Maybe not quite what you're looking for but why calculate a bounding sphere on a ball shape anyways

It's a sphere the closest it can get to another sphere or surface is it's radius.

Re: XNA Framework Ball Collison for pool/ collision

Ageel

Hi,

First you could use

if ( (ball1.location-ball2.location)<(ball1.radius + ball2.radius) )

{

// collision detected since distance between the 2 balls > total radius of the two

}

then you should loop through all balls (including the white one) after initiating the white ball movement.

I can't see any sense if the white ball is not hit afterward!! :)

hope this helps

regards,