precise collision detection

Game Technologies: DirectX 101

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    - DirectDraw Is there a better way to display an image with DirectX7 I'm not practiced DX much yet, but this one is working - only on 16M .bmp. [Code]lpDDSurf=LoadBitmap("Test.bmp");[/Code] [Code]LPDIRECTDRAWSURFACE7 LoadBitmap(char *path) { LPDIRECTDRAWSURFACE7 lpDDPic; DWORD* lPSurface=NULL; int lPitch=0; FILE *fp; DWORD szine=0,size=0; unsigned long width,height; short type,lineend; unsigned char *sor; fp=fopen(path,"rb"); if(fp==NULL) return NULL; fread(&type, sizeof(short), 1, fp); if (type != 0x4D42) { fclose(fp); return NULL; } fread(&size,sizeof(DWORD),1,fp); fseek(fp, 18, SEEK_SET); fread(&width, sizeof(long), 1,fp); fread(&height, sizeof(long), 1,fp); lineend=(size-54-(width*height*3))/height; DDSURFACEDESC2 ddsd; ZeroMemory(&ddsd,sizeof(ddsd)); ddsd.dwSize = sizeof(ddsd); ddsd.dwFlags = DDSD_CAPS | DDSD_PIXELFORMAT | DDSD_WIDTH | DDSD_HEIGHT; ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN|DDSCAPS_VIDEOMEMORY; ddsd.dwWidth =width; ddsd.dwHeight =height; ddsd.ddpfPixelFormat.dwSize = sizeof(ddsd.ddpfPixelFormat); ddsd.ddpfPixelFormat.dwFlags = DDPF_RGB; ddsd.ddpfPixelFormat.dwRGBBitCount = 32; ddsd.ddpfPixelFormat.dwRBitMask = 0x00ff0000; ddsd.ddpfPixelFormat.dwGBitMask = 0x0000ff00; ddsd.ddpfPixelFormat.dwBBitMask = 0x000000ff; ddsd.ddpfPixelFormat.dwRGBAlphaBitMask = 0x00000000; hRet = lpDD->CreateSurface(&ddsd, &lpDDPic, NULL); if (hRet != DD_OK) { return NULL; } ZeroMemory(&ddsd,sizeof(ddsd)); ddsd.dwSize=sizeof(ddsd); if ((lpDDPic->Lock(NULL, &ddsd, DDLOCK_WAIT, NULL)) != DD_OK) MessageBox(0, "Failed to lock the surface", "Surface Error", MB_OK); lPitch = (int)ddsd.lPitch; lPSurface = (DWORD*)ddsd.lpSurface; fseek(fp,54,SEEK_SET); for(int k=height-1; k>=0; k--) { sor=(unsigned char*)calloc(3*width,sizeof(unsigned char)); fread(sor,width*3*sizeof(char),1,fp); for(int i=0; i<width; i++) { szine=(*(sor+i*3+2)<<16)|(*(sor+i*3+1)<<8)|(*(sor+i*3)); lPSurface[i+k*(lPitch>>2)]=szine; } free(sor); if(!feof(fp)) fseek(fp,lineend,SEEK_CUR); } fclose(fp); lpDDPic->Unlock(NULL); return lpDDPic; }[/Code] Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - What is the .X file limbs equivalent If object B is a limb of object A, in a .X file, object B would be a mesh inside a child frame of object A (technically its the transform of that mesh, but read on). In a .X file, a frame contains a transformation matrix that represents its location in 3D space relative to its parent frames. In addition to its transformation matrix, a frame can optionally have any number of child frames or a mesh. This frame hierarchy is written to the Model class in the form of ModelBoneCollection, in which each bone has a transformation matrix, a parent bone (optionally), and 0 or more children. Meshes, which would be the visible manifestation of the limbs you describe, contain the index to their parent frame (bone in XNA). The actual limbs, however, are these parent frames. Here is an example of a simple hierarchy in a .X file: Frame RootFrame { FrameTransformMatrix {...} Frame FrameA { FrameTransformMatrix {...} Mesh MeshA {...} } Frame FrameB { Mesh MeshB {...} FrameTransformMatrix {...} } } In this example, FrameA would be a limb of the RootFrame, which represents the bone of the main model. FrameA would also be the bone of MeshA. FrameB would be another limb of RootFrame. In code, model.Root; // The RootFrame model.Bones[ "FrameA" ] == model.Meshes[ "MeshA" ].ParentBone // This line is true model.Meshes[ "MeshA" ].ParentBone.Parent == model.Root // Also true Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Status of XNAExtras? We are currently investigating this but no information as of yet. We'll post something when we have a resolution. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Vertex Animation help This blog post from Shawn Hargreaves of the XNA team might help. http://blogs.msdn.com/shawnhar/archive/2006/12/07/rendering-a-model-with-a-custom-effect.aspx There are (at least) two main ways to apply a custom effect in XNA, one is as outlined in Shawn's post, and another is to add the fx file for the effect to the project and then associate the effect with all of the ModelMeshParts in your Model.Meshes collection using code similar to this: Model bubbleModel = content.Load<Model>( "ball" ); Effect bubble = content.Load< Effect >( "bubble2" ); bubble.CurrentTechnique = bubble.Techniques[ "Basic" ]; Texture2D tex = content.Load< Texture2D >( "soap" ); bubble.Parameters[ "baseTexture" ].SetValue(tex); bubble.Parameters[ "cubeTexture" ].SetValue(content.Load< TextureCube >( "room-dxt5" )); foreach ( ModelMesh m in bubbleModel.Meshes) { foreach ( ModelMeshPart mp in m.MeshParts) { mp.Effect = bubble; } } Then when looping through the meshes when updating and drawing the model, it might look something like this: foreach ( ModelMesh mesh in Model.Meshes) { foreach ( Effect effect in mesh.Effects) { effect.Parameters[ "World" ].SetValue(mesh.ParentBone.Transform); effect.Parameters[ "View" ].SetValue(view); effect.Parameters[ "Projection" ].SetValue(projection); } mesh.Draw(); } Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - DirectDraw Deprication Direct Draw has been depriciated for a long time now... at least 3 years, this means that there will be no more work done on it and in the future it will be removed. I do not know exactly when this is going to happen, but if you have production code you should start to move it over. All of the 2d functions can be done under the directX 3D systems, it will just take a little bit of learning to move your code over. If you are using Managed Code you should have a look at XNA ( http://msdn.com/xna ) as the 2d functions are just as simple as the old directdraw systems. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - md3, 4, 5, quake model importer http://www.ziggyware.com/weblinks.php cat_id=3&weblink_id=42 Here is Delerium's source code to MD5 meshes. I beleive this was put out around Beta 1 time so you will probably need to update it. If you do please let me know. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Mesh file with texture? You’ll have to use the other mesh loader, the one that uses the extended materials, that’s where the texture file name is held. Mind you, generally it’s only the file name so you’ll have to splice the path so you get the full path. Have a look at Tutorial 6 in the samples section on how to extract the data. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - complete newb to XNA First thing you must learn is... the forum search function. Lots of good thread in the XNA framework forum too. http://forums.microsoft.com/MSDN/Search/Search.aspx words=tutorial&localechoice=9&SiteID=1&searchscope=forumscope&ForumID=882 Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Storing the graphical output of an ActiveX object? I'm hoping to write a DirectX project that can have a flash animation playing on the surface of a polygon... (it would ideally be real-time flash, for the sake of interactivity.) Is there any way to tell an ActiveX object to render its output to a buffer instead of right to the screen (or to access the location of the final 'mixdown' of a window's contents somehow ) I'm still very new to ActiveX, so I'm not sure how plausible this is... Thanks! Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - XNA in Internet Explorer? Neither XNA nor DirectX are enabled to work in IE. There are significant security issues running a DirectX application (which has direct hardware access) from inside an Internet browser. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - TextureImporter returning a Zero'd texture Your process seems reasonable. What format is your normalTexture building as What kind of data does it originally contain Have you tried just rendering it directly as RGB values rather than using it as a normalmap Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Compiling DX10 example with C99 compatible compiler (Pelles C) __RPC__deref_out and __in are sal annotations. Try including rpcsal.h and sal.h Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - New XNA Game "Microbe Patrol" Woot! 30,000 pts on my first life! Gets hard to get out of the gate from there. Good job, the game play is addicting. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
  - 14
    - Shader file loads in MDX but fails to load in XNA Run your game in debug mode and then check with line is causing the problem. Then, hover over the variables until you find one that is "null". It's more likely your xna code and not the effect file itself. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - How to detect version of D3DX installed? A game that uses the April 2006 version of the D3DX DLL should include the DirectX End-User Runtime from the April 2006 SDK and uncondionally install it during the game's install procedure. If including the entire runtime is too much of a burden (eg. for ansmall web download game) then are ways to reduce to the runtime install to just the necessary D3DX DLL to save space. Alternatively, you can point users at Microsoft's WWW page and have them download and install the runtime containing the DLL. If you need to check to see if the April 2006 D3DX DLL has been installed in order to verify that DirectX has been installed correctly by one the means above, then you can check to see if the file D3DX9_30.DLL has been installed on the machine. Other versions of the DLL have different filenames. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Reset or not reset a IDirect3DDevice9? Yes Reset() is the right way to switch to full screen, it's also the way to change any present parameter. Take care that windows style often need to be modified when moving to fullscreen : see Dx tutorial Step 1-"Creating a Window" for more details about that. You could also have a look to DXUT code which does that well. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Game Components - help! If you want something to draw after the component, put it after the DrawComponents(); call in the Draw method. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - map editor world builder tool in xna or useing xna. You don't have to be a member of the Creators Club to post to the CC forums. All you need to do is register. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Strange DX9 vertex glitch Wow ! really awsome. Sure it’s not as simple as a projection matrix problem, watching those Dx Fonts skewed. Can you tell something about your hardware and software (Graphics card, driver version, windows version, etc) Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - How can I get XNA to draw stuff faceted? You could simply create textures that are applied to the surface of the wireframe... quick and dirty method ( : Setting the drawing method to wireframe is going to do exactly what you see... draw lines between vertexes, and leave the middle section clear. You need to apply some form of surface to the triangles/polys of your mesh. It doesn't have to be a graphical texture, but it might be the easiest way... -SysErr Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Switch and KeyDown ok. I have found the management in a game. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Error in SpriteBatch.Draw() call with SpriteSortMode enum You appear to enable depth sorting and then use a draw call that doesn't specify a depth. Is there any reason for this as otherwise you could simply have called spriteBatch.Begin(SpriteBlendMode.AlphaBlend) other than this the code looks fine Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Rectangle collision detection help I could probably use a little more detail of the code, but I'll give it a shot. A couple of possibilities...one is that maybe your the bottom and top don't meet up exactly, and you're off by a pixel or 2, so you never get into your conditional logic. However more likely is that since Rectangles are value types, if you're doing this in a method and passing in the Rectangles as arguments you need to specify "ref" before the argument or any changes you make to it in the method will be discarded when the method completes. Bill Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - The Unofficial Xbox 360 dev i saw this, but my thoughts is its a small XNA app... they never show you a cd, a main menu, a boot screen.... nothing! plus how is the laptop interfacing with the 360! cause theres no way that little circuit board has some mod chip AND wireless functionality! Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - 100% pure software 3D rendering with c# Hi, On word. Magnificent... I never knew that Managed DirectX is that powerful... cheers, Paul June A. Domag Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - My first go at XNA game Can't run it, this is what I get "FightingPlane has encountered a problem and needs to close. We are sorry for the inconvenience." Event Type: Error Event Source: .NET Runtime 2.0 Error Reporting Event Category: None Event ID: 5000 Date: 1/5/2007 Time: 10:56:04 AM User: N/A Computer: ************ Description: EventType clr20r3, P1 fightingplane.exe, P2 1.0.0.0, P3 459d5554, P4 microsoft.xna.framework.game, P5 1.0.0.0, P6 455fb259, P7 128, P8 4, P9 system.typeinitialization, P10 NIL. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp . Data: 0000: 63 00 6c 00 72 00 32 00 c.l.r.2. 0008: 30 00 72 00 33 00 2c 00 0.r.3.,. 0010: 20 00 66 00 69 00 67 00 .f.i.g. 0018: 68 00 74 00 69 00 6e 00 h.t.i.n. 0020: 67 00 70 00 6c 00 61 00 g.p.l.a. 0028: 6e 00 65 00 2e 00 65 00 n.e...e. 0030: 78 00 65 00 2c 00 20 00 x.e.,. . 0038: 31 00 2e 00 30 00 2e 00 1...0... 0040: 30 00 2e 00 30 00 2c 00 0...0.,. 0048: 20 00 34 00 35 00 39 00 .4.5.9. 0050: 64 00 35 00 35 00 35 00 d.5.5.5. 0058: 34 00 2c 00 20 00 6d 00 4.,. .m. 0060: 69 00 63 00 72 00 6f 00 i.c.r.o. 0068: 73 00 6f 00 66 00 74 00 s.o.f.t. 0070: 2e 00 78 00 6e 00 61 00 ..x.n.a. 0078: 2e 00 66 00 72 00 61 00 ..f.r.a. 0080: 6d 00 65 00 77 00 6f 00 m.e.w.o. 0088: 72 00 6b 00 2e 00 67 00 r.k...g. 0090: 61 00 6d 00 65 00 2c 00 a.m.e.,. 0098: 20 00 31 00 2e 00 30 00 .1...0. 00a0: 2e 00 30 00 2e 00 30 00 ..0...0. 00a8: 2c 00 20 00 34 00 35 00 ,. .4.5. 00b0: 35 00 66 00 62 00 32 00 5.f.b.2. 00b8: 35 00 39 00 2c 00 20 00 5.9.,. . 00c0: 31 00 32 00 38 00 2c 00 1.2.8.,. 00c8: 20 00 34 00 2c 00 20 00 .4.,. . 00d0: 73 00 79 00 73 00 74 00 s.y.s.t. 00d8: 65 00 6d 00 2e 00 74 00 e.m...t. 00e0: 79 00 70 00 65 00 69 00 y.p.e.i. 00e8: 6e 00 69 00 74 00 69 00 n.i.t.i. 00f0: 61 00 6c 00 69 00 7a 00 a.l.i.z. 00f8: 61 00 74 00 69 00 6f 00 a.t.i.o. 0100: 6e 00 20 00 4e 00 49 00 n. .N.I. 0108: 4c 00 0d 00 0a 00 L..... Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - Cube Model Check the tutorials here . Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
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    - GC Related Crash? Just stole my XBOX back for a bit and did some more testing. If I force a collection I immediately crash in GraphicsDevice.DrawUserPrimitives (or DrawUserIndexedPrimitives - depending on where I make it collect) with a DriverInternalErrorException. Detailed error info is at the end of this post. The code that blows up is drawing a single triangle for a screen-aligned texture blit. - $exception {Microsoft.Xna.Framework.Graphics.DriverInternalErrorException: The driver has encountered an unexpected error. ---> System.ArgumentException at Microsoft.Xna.Framework.Graphics.GraphicsDevice.FlushBufer() at Microsoft.Xna.Framework.Graphics.UnsafeNativeMethods.Device.GetGlobal(GraphicsDevice dev) at Microsoft.Xna.Framework.Graphics.GraphicsDevice.DrawUserPrimitives[T](PrimitiveType primitiveType, ScreenFillVert[] vertexData, Int32 vertexOffset, Int32 primitiveCount) at Forces.Forces.TexBlit(Texture2D tex, TextureFilter filter, PixelShader ps) at Forces.Forces.Draw(GameTime gameTime) at Microsoft.Xna.Framework.Game.DrawFrame() at Microsoft.Xna.Framework.Game.Tick() at Microsoft.Xna.Framework.Game.HostIdle(Object sender, EventArgs e) at Microsoft.Xna.Framework.GameHost.OnIdle() at Microsoft.Xna.Framework.XboxGameHost.Run() at Microsoft.Xna.Framework.Game.Run() at Forces.Program.Main(String[] args) } System.Exception {Microsoft.Xna.Framework.Graphics.DriverInternalErrorException} + [Microsoft.Xna.Framework.Graphics.DriverInternalErrorException] {Microsoft.Xna.Framework.Graphics.DriverInternalErrorException: The driver has encountered an unexpected error. ---> System.ArgumentException at Microsoft.Xna.Framework.Graphics.GraphicsDevice.FlushBufer() at Microsoft.Xna.Framework.Graphics.UnsafeNativeMethods.Device.GetGlobal(GraphicsDevice dev) at Microsoft.Xna.Framework.Graphics.GraphicsDevice.DrawUserPrimitives[T](PrimitiveType primitiveType, ScreenFillVert[] vertexData, Int32 vertexOffset, Int32 primitiveCount) at Forces.Forces.TexBlit(Texture2D tex, TextureFilter filter, PixelShader ps) at Forces.Forces.Draw(GameTime gameTime) at Microsoft.Xna.Framework.Game.DrawFrame() at Microsoft.Xna.Framework.Game.Tick() at Microsoft.Xna.Framework.Game.HostIdle(Object sender, EventArgs e) at Microsoft.Xna.Framework.GameHost.OnIdle() at Microsoft.Xna.Framework.XboxGameHost.Run() at Microsoft.Xna.Framework.Game.Run() at Forces.Program.Main(String[] args) } Microsoft.Xna.Framework.Graphics.DriverInternalErrorException _HResult -2147467259 int + _innerException {System.ArgumentException} System.Exception {System.ArgumentException} _message "The driver has encountered an unexpected error." string + _methodDescs {Dimensions:[12]} System.IntPtr[] HResult -2147467259 int - InnerException {System.ArgumentException} System.Exception {System.ArgumentException} + [System.ArgumentException] {System.ArgumentException} System.ArgumentException _HResult -2147024809 int _innerException null System.Exception _message "" string _methodDescs null System.IntPtr[] HResult -2147024809 int InnerException null System.Exception Message "" string StackTrace null string Message "The driver has encountered an unexpected error." string StackTrace " at Microsoft.Xna.Framework.Graphics.GraphicsDevice.FlushBufer()\r\n at Microsoft.Xna.Framework.Graphics.UnsafeNativeMethods.Device.GetGlobal(GraphicsDevice dev)\r\n at Microsoft.Xna.Framework.Graphics.GraphicsDevice.DrawUserPrimitives[T](PrimitiveType primitiveType, ScreenFillVert[] vertexData, Int32 vertexOffset, Int32 primitiveCount)\r\n at Forces.Forces.TexBlit(Texture2D tex, TextureFilter filter, PixelShader ps)\r\n at Forces.Forces.Draw(GameTime gameTime)\r\n at Microsoft.Xna.Framework.Game.DrawFrame()\r\n at Microsoft.Xna.Framework.Game.Tick()\r\n at Microsoft.Xna.Framework.Game.HostIdle(Object sender, EventArgs e)\r\n at Microsoft.Xna.Framework.GameHost.OnIdle()\r\n at Microsoft.Xna.Framework.XboxGameHost.Run()\r\n at Microsoft.Xna.Framework.Game.Run()\r\n at Forces.Program.Main(String[] args)\r\n" string Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
  - 13
    - Starting a second message loop on a single thread is not a valid operation. Nevermind, I have found a solution for now. Code Snippet void VisualizeMenuItem_Click(object sender, System.EventArgs e) { Thread thread = new Thread(new ThreadStart(RunXna)); thread.Name = "XNA"; thread.Start(); ... } void RunXna() { try { Application app = new Application(); app.Run(); } catch (Exception ex) { if (!(ex is ThreadAbortException)) { //Do exception handling. } } } Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
  - 14
    - Good Tutorials C++/C# Did you try typing DirectX tutorial into google http://www.google.com/search hl=en&q=directx+tutorial Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
  - 15
    - How can I pass Cubemap texture into Pixal Shader ? For a good tutorial on environment mapping and HLSL, see the following: http://msdn.microsoft.com/library/default.asp url=/library/en-us/directx9_c/Goal_3___Environment_Mapping.asp We don't have support for Effect or HLSL syntax highlighting in v1. This is something we're looking at providing in a future version. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.
  - 16
    - New XNA wargame : StrikeZone Good job. Keep us updated. Tag: Game Technologies: DirectX 101 precise collision detection Game Technologies: DirectX, XNA, XACT, etc.

Ahmed Salaheldin

Hi,

this is my first directx project and i am having some trouble with collision detection

i want to detect collisions between irregular objects and using bounding boxes or spheres around the whole object isn't precise enough

i need for example to detect collisions between a ball and a bowl (eg the ball hits the inner wall of the bowl, bounces off and finaly comes to rest at the bottom of the bowl)

Please reply, thanx

Re: Game Technologies: DirectX 101 precise collision detection

Etienne2005

For question about math and Physic you should ask the forum of gamedev.net in that section (math and physic)
This forum is more for DX question

As for collision your bowl will consist of many triangle
So your problem is to have a collision between a ball and a triangle first
Then you do the same test for all other triangle in your mesh

Collision are not easy and many options exist depending of what time you have

You can see a collision engine in nehe website

Re: Game Technologies: DirectX 101 precise collision detection

Ahmed Salaheldin

Thank you for your reply,

That is exactly what i am asking about, how do i test collisions against one triangle in my 3d object (code speaking that is)

Re: Game Technologies: DirectX 101 precise collision detection

Etienne2005

First you need to know if your ball is colliding with the plan where your triangle is

Most collider will first test if your ball is on one side of that plan or the other
Or if the ball is cut by that plan (a collision between a ball and a plan)

If it's colliding it will then test if the ball collide with the area of the triangle on that plan

Maybe this could help you :
http://www.flipcode.com/cgi-bin/fcarticles.cgi show=64175

#include "stdafx.h"

ozbool testIntersectionTriSphere(const Vec3f *_triPts[3],