About Vertical & Horizantal



What is from Wikipedia
In topography, the angle made by two ground lines is measured horizontally, and is called a horizontal angle. Horizontal angles are usually expressed in degrees. A full circle is divided into 360 degrees, abbreviated as 360°.  Let's look at the picture. the line called "x", we can act it as horizontal angle, and line "y" is vertical angle. In fact, there is no absolute vertical or horizontal angle, just because of the angle what you are looking at the moment. So there must be a reference when you look at something.

Reference:http://en.wikipedia.org/wiki/Vertical
                 http://en.wikipedia.org/wiki/Horizontal


EXAMPLE and My opinion

 

Frontal, involved

This is a direct gaze from Audrey Hepburn. When you see it , you feel like that she is looking at you as well and you are involved at the moment. As a viewer, maybe we are talking, chatting. Anyway, i feel comfortable and relax from Audrey's eye contact.

 

Oblique, detached

Here is a another picture about Audrey Hepburn. But it is an indirect gaze. I feel kind of detachment betweenmy own and represented participant in this picture. I just like a bystander, she is wearing her earing, may be making up in ladies room. And she has no idea who is looking at her.  I think what oblique meaning is as a spectator to view the environment around you.