3D Axes: initial setup
Let me begin here, and incrementally improve the representation.
I don't want 3D coordinates to "happen" to me. I may pick them out of a list, but I think there is a better way.
My coordinates will describe an intrinsic property of physical objects (orientation), and should be consistent from object to object. So, I have introduced coordinates in this order
1. orient an object in a natural way
2. describe that orientation with math.
I call these object or local coordinates.
Like this: