Support for other values for "front" vector

[unframework]

Nice library, great work! However, I seem to have hit a snag in my usage.

I am setting up a view where Z-axis points up, and X/Y describe a horizontal plane that the viewer is looking at from above. I specified the up vector to be [0, 0, 1], correspondingly, but that's when mouse rotation stopped working: both horizontal and vertical mouse movement only change the "theta" angle. Seems like that is because the Z-axis is hardcoded to also be the "front"? Where I need it to be [0, 1, 0] instead.

In other words, since the options accept an up vector, it would be nice to set the front as well.

Thanks!

[gre]

definitely looking for this as well as a right vector, but these probably can be computed from other values? not sure how