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Roof Top Pew Wee

Changing the color of a vertex in the buffer.

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This may be a dumb question, but I don''t know where to look for this one. Say I create a vertex buffer with 4 vertices (a color, D3DXVECTOR3 holding the position, and the tu and tv for texture positioning). How do I access each individual vertex once I do this, so that I can change their colors? Thanks --Vic--

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You have to "lock" the vertex buffer (vb). Look up the Lock function in the SDK help. You supply a pointer which ends up pointing to the vertices:

MYVERTEX *pVertices;

vertex_buffer->Lock(..... (BYTE **)pVertices .....);

loop i
pVertices-i-.colour = D3DCOLOR(255,255,255);
end loop

vertex_buffer->Unlock();


There we go. Hope you enjoyed my pseudo-C.

Edited by - freshya on February 19, 2002 9:56:03 PM

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