Actually, Z-up coordinate systems can also be called right or left handed depending on which way Y points. :-)
But really, it was just personal preference. Way back when I was learning 3D graphics, I found it easiest to visualize Z as elevation above the XY plane. I'd also used some software that followed that convention (like trueSpace and later 3D Studio Max).
These days, I mainly work with software that tends to favor a Y-up convention by default.
But really, it was just personal preference. Way back when I was learning 3D graphics, I found it easiest to visualize Z as elevation above the XY plane. I'd also used some software that followed that convention (like trueSpace and later 3D Studio Max).
These days, I mainly work with software that tends to favor a Y-up convention by default.