Can a single draw call reference multiple VBOs?

Graphics and GPU Programming Programming

Started by Promit January 04, 2005 12:49 PM

2 comments, last by Shannon Barber 19 years, 3 months ago

13,404

Author

January 04, 2005 12:49 PM

Is a single call allowed to reference multiple VBOs, in a fashion similar to D3D vertex streams? That is, can I bind a buffer containing xyz, set the vetex pointer, then bind a buffer containing uv, set the tex coord pointer, and then draw with both buffers being used?

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Shannon Barber

1,684

January 04, 2005 01:04 PM

Yeah, OGL uses the same functions for both ways, you just set the stride to 0 if you are using seperate buffers (what I do, and what I think is the preferred layout).

You can set a buffer for vertex xyz, a buffer for normals, for colors, for texcoors, and for a color index buffer.

see glVertexPointer et. al.
and glDrawArrays or glDrawElements (indexed version of ...Arrays)

- The trade-off between price and quality does not exist in Japan. Rather, the idea that high quality brings on cost reduction is widely accepted.-- Tajima & Matsubara

_the_phantom_

11,263

January 04, 2005 01:11 PM

this also extend to the GLSL generic buffers as well

Shannon Barber

1,684

January 04, 2005 01:41 PM

Also check out the ARB_vertex_buffer_object extention, nVidia has a pdf on using GL VBO's here

- The trade-off between price and quality does not exist in Japan. Rather, the idea that high quality brings on cost reduction is widely accepted.-- Tajima & Matsubara

Can a single draw call reference multiple VBOs?

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Can a single draw call reference multiple VBOs?

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