Few question about DirectX 11

Papadopol Discuiticilef · 2012-08-21T06:52:30

Hi. Im learning DirectX 11 and graphic programming and I want to understand everything before I go further. So I'll might ask some stupid question here and I'll be glad if you could help a noob. 1. The vertices order in a buffer for a triangle matter in any way (assuming the the mapping vertex-uv-etc is correct) excepting optimisation? 2. If I want to optimise for vertex cache I need to render front to back objects, traingles or vertices ? Assuming that I prefer rendering huge buffers (seems that improves dramtically the performance) intead of small buffers does the vertice order matter ? If I have a SINGLE huge vertex buffer the GPU automatically cuts unseen vertices with CullFaces and I dont need any kind of optimisation ? Optimisations are for sorting separated vertex buffers ? 3. Is there any advantage using index buffer and split in more buffer, one for vertices, one for UVs, one for normals ? If yes how can I detect offline algoritmicaly on my mesh if is a fps boost ? 4. What tools is best for debugging low level GPU performance with those kind of optimisation? (Im using Visual Studio 2010, DirectX 11 SDK, SM 5.0)

For Beginners

Started by Papadopol July 23, 2012 06:06 PM

12 comments, last by Papadopol 11 years, 8 months ago

Papadopol

178

Author

August 05, 2012 03:53 PM

Also witout font smothing and Dx filtering

Papadopol

178

Author

August 05, 2012 04:08 PM

Also how can I display those quads in the same size even if I resize the window on change the resolution ?
Assuming I dont care about about window resizing. A monitor with a native resolution of 1024x768 will display a quad in the same ratio as I see it on my native resolution of 1920x1200 ?

SamiHuutoniemi

259

August 06, 2012 03:14 PM

Looks the same with any filter in the sample.

D3D11_SAMPLER_DESC samplerDesc; samplerDesc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR; samplerDesc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP; samplerDesc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP; samplerDesc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP; samplerDesc.MipLODBias = 0.0f; samplerDesc.MaxAnisotropy = 0; samplerDesc.ComparisonFunc = D3D11_COMPARISON_ALWAYS; samplerDesc.BorderColor[0] = 0; samplerDesc.BorderColor[1] = 0; samplerDesc.BorderColor[2] = 0; samplerDesc.BorderColor[3] = 0; samplerDesc.MinLOD = 0; samplerDesc.MaxLOD = D3D11_FLOAT32_MAX;

Ok, stupid question, but do you SET the sampler state? Almost sounds as if you do not.

Also how can I display those quads in the same size even if I resize the window on change the resolution ?
Assuming I dont care about about window resizing. A monitor with a native resolution of 1024x768 will display a quad in the same ratio as I see it on my native resolution of 1920x1200 ?

You can, but you would have to do the calculations in your program.

Papadopol

178

Author

August 21, 2012 06:52 AM

Yes, actually I didnt set the sampler state. Thank you for pointing that.
Another questions:
If I have a class and I want to debug to a file or to a messagebox etc is ok to do that with a define ?
For exemple:



#define DEBUG 0



//some code that makes something

//..



#if DEBUG == 1

//write debug information about the code above to a file

#endif



// other lines of code

// ....

#if DEBUG == 1

//write debug information about the code

#endif

I know that are many logical ways to do that but I wonder wich one is better and used by a programmer.

Thanks.

Few question about DirectX 11

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Few question about DirectX 11

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