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SetStreamSource multiple streams using same VB?

Started by Prince0fPersia Oct 18, 2005 at 12:43 AM 0 replies 900+ views

Original Post

Oct 18, 2005 at 12:43 AM

Is it bad to use same Vertex Buffer to set multiple stream sources using SetStreamSource? i mean like


LPD3DVERTEXBUFFER9 pVB;

pDevice->SetStreamSource(0, pVB, 0, sizeof(VERTEX1));
pDevice->SetStreamSource(1, pVB, 100, sizeof(VERTEX2));
pDevice->SetStreamSource(2, pVB, 300, sizeof(VERTEX3));
pDevice->SetStreamSource(3, pVB, 700, sizeof(VERTEX4));

Scythen

Oct 18, 2005 at 1:00 AM

You will probably see different results on different cards and different drivers.

If I had to guess, the drivers and hardware are probably set up to be most efficient when using different vertex buffers for each stream. I can imagine some locking/synchronization overhead when reading from one vertex buffer but that’s a guess.

Probably have to run some tests of your own to figure that one out.

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