Rotational Axis
These axis describe movement in space within an RT3D engine.
Pitch, Yaw, and Roll
Pitch is red, yaw is green, and roll is blue.
Pitch
Most RT3D engines count from 90 to -90 degrees, starting out pointed straight up, turning downwards and ending pointed straight down. If you nod your head "yes," this is pitch in action. Straight forward is 0 degrees. Also called declination.
Yaw
Most RT3D engines count from 0 to 360 degrees, starting out pointed straight forward, turning clockwise and ending pointed straight forwards again. If you shake your head "no," this is yaw in action. Straight forward is both 0 and 360 degrees. Also called azimuth.
Roll
Most RT3D engines count from -180 to 180 degrees, starting out twisted upside-down all the way to the left, turning clockwise and ending twisted upside-down all the way to the right. If you tilt your head to read the spine of a book, this is roll in action. Straight forward with no roll is 0 degrees.
