Absolutely agree!Originally Posted by Eric Lengyel
Quads are very useful feature for things like particles or many billboarded distant objects (trees) etc.
Also useful for drawing of text (quad per letter) tho for that one can also use point sprites if the text is in screen space(which is most often the case)
You can't often replace quads with point sprites because the latter can only be screen-space axis-aligned squares (if you use bigger sprite and cut the unneeded parts with texkill, you waste gpu time and/or fill rate)
They are far more useful than triangle fans for example yet the last aren't deprecated but the quads are.
This was one of the nice OpenGL features that contributed to it's charm in contrast to direct 3d
About the quad_strip and polygon, they are unneeded indeed: the first is a triangle strip with different vertex order and the second is triangle fan
But i'm so unhappy about the quads