Triangle strips vs triangle fans

[zeraiam]

Hi
I would like to know to what extent triangle fans are more efficient (in speed) than triangle strips.
Since I'd be likely to use more glBegin-glEnd (or glDrawElements or whatever) calls if I use triangle fans, would this overhead be compensated by the less number of transformed vertices ? Or is there a minimum number of vertices per-fan that would garanty its efficiency over strips (to draw roughly the same object)?

[mikael_aronsson]

Hi !

I don't think there is any speed difference between fans and strips, they are useful for different kinds of geometry.

I do think most cards have an optimal size for begin/end but it's different for each card and you can't find out anything about it.

Mikael

[zeraiam]

well thank you,
then I'll use strips since it's easier to adapt them to any mesh.