On May 13, 2008, at 2:10 PM, Richard Somers wrote:
"In general, use the vector forms of commands to pass precomputed
data, and use the scalar forms of commands to pass values that are
computed near call time."
Does this mean for instance that the scalar forms of commands should
be used between glBegin and glEnd and the vector forms should not
for best performance?
If this is the case it does not make sense. You would think that the
vector form of the command would always be faster because you are
passing just a pointer parameter.
Depending on the architecture, it could pass all the arguments of the
scalar form in CPU registers. An array of floats on the heap or the
stack OTOH would probably get saved from the CPU registers to memory
before the GL call and then the GL function itself would have to load
it again from there.
Well, that's my guess at least.
-Stefan
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Mac-opengl mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/mac-opengl/email@hidden
