FWIW, my vote is against 2D development in OpenGL. For very basic immediate results, 2D in OpenGL would be a nice option, but the axis labeling is completely undeveloped.
In my experience, it's one of those small problems that promptly becomes a big problem if you want it to be done properly. In PGPLOT the labeling works extremely well, and I'd imagine that it's good in PLplot. I can't comment for certain, as I've not built and played with PLplot in a long time and I'm used to PGPLOT. If people have time and energy for getting universal 2D plotting integrated with PDL, I'd say that trying to get PGPLOT's licensing concerns sorted out first (probably not possible...), or maybe making PLplot compile easily for Linux/Windows/Mac would be more useful than crowbaring OpenGL and TriD into being a good 2D plotting package. Cheers, Matt
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