My math teacher projects graphs from her calculator onto a screen.  So y
is up and down and z is in and out.  But with our calculators on our
desks, y is toward and away from us and z is up and down.  I read
somewhere that the reason that POV-Ray uses the left-handed coordinate
system is because people are used to seeing graphs on boards and
pointing the y axis up.  But positive rotation is clockwise with POV and
counterclockwise with math classes.  So if POV-Ray adopted y as up, why
not positive rotation as being counterclockwise?  I hope that I'm wrong
about this otherwise there would be a self-contraction.
Brendan

Post a reply to this message