Colors, RGB values and vector confusion

Game Technologies: General

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    - Moving the view in 2D games Awesome reply Scott! :) I use the same approach in the Tiled RPG I've been making for fun, using a Camera class to draw the view, and having a CameraLookAt(Object/Position) function to set where it should start drawing from. I just call CameraLookAt(MainCharacter) everytime I update my character's position, and don't have to worry about it more. There's something that I've always wondered about these plataform games like the old Super Mario's. How are the usually maps saved Are they one huge contiguous horizontal picture, or they're made with tiles following a map array of some sort, like old RPG's And how do they define for each part of the map, where the bottom floor is located; if the level is all slopy going up and down: is this information stored somewhere, or is it done in real time with collision detection between each sprite and the floor layer David Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Delete a picture file after Bitmap.FromFile call. So create a new bitmap object and draw it using Graphics.FromImage, Graphics.DrawImageUnscaled Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Drawing Animated Sprites to the Screen Hello, I'm writing an RPG-Esque creation tool. And I was wondering what the best way to draw sprites would be. 1.) Draw the sprite from a Raw .gif file. 2.) Create a series of Frames for the sprite and loop through each sprite incrimenting the frame number. I was wondering what the best approach to this is and how to impliment it. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Cant Light Mesh...Help.. I am trying to light a simple mesh created by calling d3dxCreateBox(); I can render the mesh without lighting and it will be white but the moment i turn lighting on it wont light... Code follows... sry for formatting... LPD3DXMESH g_Cube; LPDIRECT3DDEVICE9 InitializeDevice ( HWND han_WindowToBindTo); void DrawScene (LPDIRECT3DDEVICE9 p_dx_Device); void SetUpCamera (LPDIRECT3DDEVICE9 p_dx_Device); LPDIRECT3DDEVICE9 InitializeDevice(HWND han_WindowToBindTo) { LPDIRECT3D9 p_dx_Object; LPDIRECT3DDEVICE9 p_dx_Device; p_dx_Object = Direct3DCreate9(D3D_SDK_VERSION); if (p_dx_Object == NULL) MessageBox(han_WindowToBindTo,_T("DirectX Runtime library not installed!"),_T("InitializeDevice()"),MB_OK); D3DPRESENT_PARAMETERS dx_PresParams; ZeroMemory( &dx_PresParams, sizeof(dx_PresParams) ); dx_PresParams.Windowed = TRUE; dx_PresParams.SwapEffect = D3DSWAPEFFECT_DISCARD; dx_PresParams.BackBufferFormat = D3DFMT_UNKNOWN; if (FAILED(p_dx_Object->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, han_WindowToBindTo, D3DCREATE_HARDWARE_VERTEXPROCESSING, &dx_PresParams, &p_dx_Device))) MessageBox(han_WindowToBindTo,_T("Failed to create device!"),_T("InitializeDevice()"),MB_OK); p_dx_Device->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE); D3DXCreateLine(p_dx_Device, &pLine); D3DXCreateBox(p_dx_Device,2,2,2,&g_Cube,0); // Fill in a light structure defining our light D3DLIGHT9 light; ZeroMemory( &light, sizeof(D3DLIGHT9) ); light.Type = D3DLIGHT_POINT; light.Diffuse.r = 1.0f; light.Diffuse.g = 1.0f; light.Diffuse.b = 1.0f; // Point lights have no direction but do have a position //Set light position to the camera's point light.Position = D3DXVECTOR3(0,0,-10); // Tell the device about the light and turn it on light.Attenuation0 = 0.1f; light.Range=200.0f; // Tell the device about the light and turn it on p_dx_Device->SetRenderState( D3DRS_LIGHTING, TRUE ); p_dx_Device->SetLight( 0, &light ); p_dx_Device->LightEnable( 0, TRUE ); return p_dx_Device; } void SetUpCamera(LPDIRECT3DDEVICE9 p_dx_Device) { D3DXVECTOR3 m_EyePos(0, 0, -10); D3DXVECTOR3 m_TargetPos = D3DXVECTOR3(0,0,0); D3DXVECTOR3 m_UpVector(0, 1, 0); D3DXMATRIXA16 m_View; D3DXMATRIX m_Projection; D3DXMatrixLookAtLH(&m_View, &m_EyePos, &m_TargetPos, &m_UpVector); p_dx_Device->SetTransform(D3DTS_VIEW, &m_View); D3DXMatrixPerspectiveFovLH(&m_Projection, D3DX_PI/4, 500/500, 1, 50); p_dx_Device->SetTransform(D3DTS_PROJECTION, &m_Projection); } void DrawScene(LPDIRECT3DDEVICE9 p_dx_Device) { p_dx_Device->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(72,61,139), 1.0f, 0); p_dx_Device->BeginScene(); for (int curFace = 0; curFace < g_Cube->GetNumFaces(); curFace++) { p_dx_Device->SetFVF(g_Cube->GetFVF()); g_Cube->DrawSubset(curFace); } p_dx_Device->EndScene(); p_dx_Device->Present(NULL, NULL, NULL, NULL); } Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Screen shots on the Xbox 360 Yes, that should work, but the part I can't figure out how to do is this: How do I get the tga (or whatever file format one would use) back to the PC As far as I can tell, you can save to file on the 360, but I see no way of transferring it back to the PC. Maybe this is trivial and I have misunderstood the documentation, I don't know. :-) I guess what I am really asking is this: How do I access a file that has been stored on a 360 storage device using the XNA framework from my PC Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Render Target returns NaN on 360, not on PC When I deployed to the 360, I found that Vector4 textures are not supported as a render target, and that only one render target is supported at a time. I've refactored my code such that it uses four R32Fs and one render target, and this runs fine on my PC. But when deploying to the 360 I ran into another problem; GetData after GetTexture is returning completely wrong information. The thing is... even this simplified pixel shader returns NaN on 360! float4 Test() : COLOR0 {return (float4).25;} But it returns .25 for on the PC. How I'm calling it: this .GraphicsDevice.SetRenderTarget(0, null ); this .GraphicsDevice.SetRenderTarget(0, rt[Offset + 0]); currentEffect.Begin(); currentEffect.Techniques[ "Particle" ].Passes[ "UpdateParticleLX" ].Begin(); this .GraphicsDevice.DrawIndexedPrimitives( PrimitiveType .TriangleList, 0, 0, this .VertCount, 0, this .PrimitiveCount); currentEffect.Techniques[ "Particle" ].Passes[ "UpdateParticleLX" ].End(); currentEffect.End(); this .GraphicsDevice.ResolveRenderTarget(0); ParticleLocation[0] = rt[Offset + 0].GetTexture(); Debug of GetData on the PC shows: 0.2500,0.2500 0.2500,0.2500 0.2500,0.2500 0.2500,0.2500 0.2500,0.2500 0.2500,0.2500 ... XBox shows: NaN,NaN NaN,NaN NaN,NaN NaN,NaN NaN,NaN NaN,NaN ... Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - "Kitchen Sink War" Download !!! ECHS BACHS wrote: Now that DBP is Over (for now) ... What do you mean "over". It's not over by a long shot. Why would you say that Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Re-focusing XNA game window using System.Windows.Forms; ... Form myForm = (Form)Form.FromHandle(this.Window.Handle); myForm.Activate(); worked like a champ thank you very much. You saved me a lot of digging. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - How do i do rigid,soft physics and particle stuff in XNA? I'm new to XNA, got the basics. Can you help Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
  - 10
    - Runtime footprint on 360 How much RAM is left to play with on the 360 once the launcher and runtime has loaded Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Custom Processors and Asset Duplication Oh, right yeah, sorry, It extends the ModelProcessor class, overriding the Process method only: public override ModelContent Process(NodeContent input, Microsoft.Xna.Framework.Content.Pipeline.ContentProcessorContext context) { ModelContent modelContent = base.Process(input, context); ProcessInfo(input, modelContent); return(modelContent); } clearly all the additional work takes place in ProcessInfo, its a fair amount of code, too much to post up i think, but all it does is traverse the NodeContent passed into it and modify the ModelContent by adding custom data structures to tag properties. I also wrote a ContentTypeWriter specifically for the custom data structure i added in the Tag properties (so it didn't extend ContentTypeWriter<ModelContent>, it extended ContentTypeWriter<NewDataStructure>) and when i process a linked asset, my reader can indeed read what the contentwriter wrote and i can use the content in my application and i have gotten the expected results with the test cases i have used so far. There's too much code too post here, but if no one has the foggiest idea still, i was hoping to post it on my website as a starting point for anyone else looking to write a processor for animation data (if that animation sample is going to be caught up in the release process for much longer), people can take a better look at it then, but it would be nice to get it fixed up before then Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Video/Animation Playback Is anyone interested then I've very nearly completed the class thanks to Shawn's help, so I may post it up if there is any interest... Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - PC deployment in a single download. (Minus framework download) Thank you, with all the automation in this new animal I was not sure of PC publishing and how to get the framework to the user without asking them to go out of their way to get something running. I have just waded into this VS Express c# pond from a long time in c++ professional game dev and I sure like it here =)... Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Blender Is there some where you could post some samples of you model so I can test them, I will try and simulate what you have posted about but the sample scenes you have will make sure we are using the same models. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
  - 15
    - Show off your website and/or game! I sent my info, but never saw any result... :( Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Could C# be the future of gaming? I develop serious games/simulations at my job and we use C++ exclusively, and any loss of performance would put us below our minimum requirements for framerate, etc. However, I plan on downloading the new XNA software and learning C#. Since hardware can make up for some performance loss in the future, and for some smaller applications it would be great to reduce dev time and the number of lines of code when performance is not as important. At some point the total cost of developing an application is offset by the performance gain you would get with using C++, if C# is really as easy as I have read about. Jeff Wright State University Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - DBP Submission Platform Johnnylightbulb wrote: Joel, I'm in Orlando too, if you need another set of eyes to see how your 360 code deploys/runs, I'd be happy to check it out for you :) Ahh, another fellow Orlandonian. Shoot me an email (joelmartinez@gmail.com) :-) Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Deployment / strange Network Problem The Deploying a 360 Game page says nothing about needing Media Connect. You need that to share music and video between the PC and 360 I believe, not for XNA stuff. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - please take new forum posts over to http://creators.xna.com Kyle_W wrote: Wow I just noticed that you have to have an X-Box Live account to even make a new post in the new forums. Does this mean that Windows game developers who do not own X-Boxes are to be left high and dry with no forum support Seems like the XNA Team wants to make their product lose popularity. Nope, signing up is free. You can make a new account without an xbox. More info here: http://letskilldave.com/archive/2007/03/06/The-Permanence-of-Gamertags.aspx Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Dream Build Play Contest Question - Using languages other than C# I understand your point, but as I see it, the DBP contest was made specifically for XNA Game Studio Express. Anyway, I looked into the full rules, and this is what it says: b. Get the Tools. Download XNA Game Studio Express, for free at http://msdn.com/xna and/or via a link from the Site, including the Spacewar Starter Kit. Participants can also download Torque X tools and technology (optional) for free at http://www.garagegames.com/products/torque/x and/or via link from the Site, and may visit the XNA Developer Center at http://msdn.com/xna for additional helpful information relating to participation in the Promotion. c. Develop a �� Relatives of Spacewar �� Game. Using the tools and information identified above , develop a playable video game application (��Game��,) for operation on either the Windows XP SP2 or Xbox 360 platform using the codebase and/or content from the Spacewar Starter Kit which showcases the game design, art and storyline and can be played by the judging panel, as specified in the XNA GSE Toolkit and as specified in these Rules. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Best way to manipulate vertex data between draw calls? exactly. Lets say you want to draw bitmaps by rendering them as textured quads. And sometimes you want to flip them. You could have one vertex with 12 entries. The first 6 entries of the buffer could have appropriate coordinates for an unchanged blit-like functionality and the last 6 could be different texture coordinates that would render it flipped. I don't know how appropriate it would be to make 6*number of characters entries sized vertex buffer. I think it'd be fast and I don't think it'd even be that hard on memory. But there's bound to be a less-envolved way to do it. If your text is in a single texture, maybe you could just use an overload from spritebatch. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
  - 6
    - Download Issues There's the thing, though...I can't download anything from Microsoft. And to Peter: I'll try that. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - XNA Framework runs fine in Visual Studio 2005 Standard Be careful with the "my way or the highway" mentality. It really hasn't been serving MS very well lately. Visual Studio 2005 Professional is NOT a free edition of the development environment. Its not rediculous that developers may wish to use it for some XNA development. While the Game Studio Pro version is the logical choice for the complete set of functionality, being so rigid that you intentionally avoid the Visual Studio 2005 Pro users, seems counter-productive and will send them into the hands of non-MS alternatives. (*cough* mono/tao/OpenGL) Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Compiling DX10 example with C99 compatible compiler (Pelles C) Thanks again! It seems on my way to compile a DX10 program with Pelles C there is only one problem left. If anyone could give me a helping hand with getting the GUID under C. g_pSwapChain->lpVtbl->GetBuffer( g_pSwapChain, 0, __uiidof(ID3D10Texture2D), (LPVOID*)&(pBackBuffer) ) ; This is what I have. Initially I thought that IID_ID3D10Texture2D would help here, but it doesn't. The compiler gives me the following error message. C:\ExampleSpace\Intro Programming\Intro VX1\Window.c(102): warning #2027: Missing prototype for '__uiidof'. C:\ExampleSpace\Intro Programming\Intro VX1\Window.c(102): error #2066: Illegal use of type name 'ID3D10Texture2D'. C:\ExampleSpace\Intro Programming\Intro VX1\Window.c(102): error #2140: Type error in argument 3 to a function; found 'int' expected 'const const struct _GUID *'. *** Error code: 1 *** I looked into d3d10.h and it seems like lots of this stuff is only available for C++. I can see that the define for __uiidof seems to be only available in C++. Thanks in advance for your help, - Wolfgang Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Rants on XNA 1.0 Hm, okay. Seems we won't be switching to XNA anytime soon. I'll probably look into the patterns used and maybe start using them in my own engine, so if/when XNA gets to a state where we can use it, the porting will be less difficult. Thanks for the rant, at this stage such posts are the most interesting for me! Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
  - 10
    - List Implementation Question Once again - I fail to see the point of the List<> of List<>s. List<Sprite> Players = new ( ... ) List<Sprite> Enemies = new ( ... ) List<Sprite> Entities = new ( ... ) Sprite PlayerOne = new ( ... ) Sprite BadBuy = new ( ... ) Players.Add(PlayerOne); Enemies.Add(BadGuy); Entities.Add(PlayerOne); Entities.Add(BadGuy); Since Sprite is a reference type (I'm assuming it's a class not a struct on your end), any time you make any changes to PlayerOne, those changes will be changed for all lists. In all honesty though, I don't see the reason for all the separate lists to begin with. I store all of my game objects in one big list and it's never been a problem. You just iterate through the list, updating their position, checking for collisions and rendering them. It doesn't really matter if it's a player, or an enemy, or a bullet, or a wall. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
  - 11
    - Procedural Texture2D = Blurred Texture I started working backwards from the BasicEffect example in the documentation. I am starting to see where some of the problems are occuring with the 3D code, though I have not quite figured out why yet. I also tried saving the procedural Texture to file and loading from there using various texture settings (the exact structure name escapes me), 2D was unchanged. Tried making the area slightly bigger and drawing the texture in the middle using an origin at (.5, .5). Surprisingly, I could not tell the texture had moved and it looked more blurred than the (0,0) origin. Given that the blur effect seemed uneven before, my current working theory is that the Texture is not being displayed at 100% of size, despite telling XNA to do otherwise. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - Ortho-picking How is picking in an orthogonal projection supposed to be done The pick example from the sdk works only in PerspectiveFov projection, but not in Ortho projection. It seems to be all in the calculation of the pick-ray vector, but I can't find out how to set it :/ Tnx! Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
  - 13
    - Model animation The problem is that XNA offers a lot of easy tools for programming in c# to write games, but model animation seems to be barely supported, and that weird since animation is a very important thing for 3d games. I used to write my games/applications in vb .Net but when I discovered XNA i switched to c# finally. The languages are quite similar so I'm getting used to c# now quite fast. I am familiar with 3dstudio max and paintshop pro to te create my models including animation and texturing. It's just that information about loading and playing animation in C# that can get me started. jeroen Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
  - 14
    - HLSL effect syntax highlighting Hi everbody :D, I just wanted to know if it is possible to have this feature inside c# express, that way no need to always launch another application (Renderisland || Fxcomposer). By the way thank's a lot MSFT for making such cool tools and frameworks. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
  - 15
    - Getting my application to run on someone elses computer Just because someone tells you they have DirectX 9.0c does not mean thay have everything they will need. When Windows reports this is is saying it has the 'core files' installed. DirectX also has lots of optional files such as the D3DX DLLs (there is a new one every 2 months), Managed DirectX, XInput, Xact (and maybe some more I am forgetting). As an application developers it is YOUR responsibility to ensure that the correct files are installed with your game by using the DirectXSetup SDK http://msdn2.microsoft.com/en-us/library/bb173026.aspx and http://msdn2.microsoft.com/en-us/library/bb219742.aspx and http://msdn2.microsoft.com/en-us/library/bb174600.aspx Or you can just send your friend to http://www.microsoft.com/downloads/details.aspx familyid=2DA43D38-DB71-4C1B-BC6A-9B6652CD92A3 which will check for and install all optional components up to the day of install. (this means that if in 6 months you choose to use a future verion of d3dx then they will have to revisit this site to get the new d3dx) and NO you cannot include the file with your application. The DirectX EULA does not allow you to ship DirectX DLLs unless they are inside the original DirectX cab files and installed by DirectXSetup. This enables Microsoft to know where files are if they need to be patched and also stops people fro duplicating identical files all over my hard drive. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.
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    - TitleLocation writeable on the 360? I believe you're supposed to use the Storage namespace, which contains StorageDevice and StorageContainer abstractions. I would be surprised if the regular File API worked on Xbox. Tag: Game Technologies: General Colors, RGB values and vector confusion Game Technologies: DirectX, XNA, XACT, etc.

tatman blue

I've started playing with various XNA tutorials available on the net. I see several examples where colors are made from Vector4 structures. So my question is:

is there any resources for looking up Vector4 values to know which one to use for a given color

In paint I get arb values (which is between 0 and 255) and it looks like I need to convert that to vectors which use values between 0 and 1.

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Re: Game Technologies: General Colors, RGB values and vector confusion

n0n4m3

Hi,
usually the color's components are stored between 0 and 1 like you said, to convert from the 0 - 255 to 0 - 1 just divide the value of each component by 255.
The use of vector4 instead of vector3 is because of the alpha channel. The alpha channel has the opacity or transparency of the color which is usually also a value between 0 (completely transparent) and 1 (opaque).

As for tools to do what you want, well I don't know any from memory now but you could use Color.FromArgb in many cases to get a color using 0 - 255 values.

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