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Geometry Parametrically


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#1 Saurabh Torne   Members   -  Reputation: 209

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Posted 16 February 2013 - 08:08 AM

Hi,

I want to create geometry without worrying about efficiency of drawing. I'm looking for a ways to draw triangles with Triangle list or triangle strip but without index buffers. It would be great to get some pointers or samples for doing it in dx.

Reply,

Saurabh


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#2 Nik02   Crossbones+   -  Reputation: 2643

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Posted 16 February 2013 - 08:37 AM

Just use IDirect3DDevice9::DrawPrimitive instead of DrawIndexedPrimitive (on D3D9 and earlier) and ID3D11DeviceContext::Draw instead of DrawIndexed (on D3D11).

 

You'll waste some bandwidth and GPU processing power if you duplicate your vertices, but if your index calculation is complex for some reason (dynamic geometry, for example), you may actually save time on non-indexed drawing.


Edited by Nik02, 16 February 2013 - 08:37 AM.

Niko Suni


#3 SaurabhTorne   Members   -  Reputation: 239

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Posted 19 February 2013 - 03:58 AM

Thanks Nik02 :)



#4 Nik02   Crossbones+   -  Reputation: 2643

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Posted 19 February 2013 - 05:11 AM

You're welcome :)


Niko Suni





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