Why AliceWorld??

[martincmartin]

Why are Orbit's pos and vel in "AliceWorld" (y & z flipped)?  Other than confusing developers, what purpose does it serve?  Easier to translate into UI or something?

Quote

The nice thing about standards is that you have so many to choose from.

      -- Andrew S. Tanenbaum

 

[CobaltWolf]

what

[sarbian]

28 minutes ago, martincmartin said:

Why are Orbit's pos and vel in "AliceWorld" (y & z flipped)?  Other than confusing developers, what purpose does it serve?  Easier to translate into UI or something?

 

That one of the mystery of KSP code you are unlikely to find out because AFAIK no one around knows.

[martincmartin]

I just found one possible reason: if you have a direction (e.g. the direction towards prograde in your vessel's coordinates), the recommended way to get a rotation object from that is to use Quaternion.LookRotation().  But that assumes the "forward" direction is along z, and KSP assumes its along y.  That is, they're separated by a rotation of 90 degrees about the X axis, which swaps Y & Z (as well as changing the sign of one, but that doesn't matter for LookRotation().)