| A | B |
|---|
| horizon line | that places where the land the sky meet |
| picture plane | a make believe paper or canvas between you and the work you are illustrating |
| vanishing point | the single point on the horizon where all the lines on the ground level seem to come together |
| single point perspective | a single vanishing point on the horizon line |
| double point perspetive | two seperate vanishing points on the horizon line |
| triple point perspective | two vanishing points on the horizon and one in the sky or on the ground |
| light reference | the point where your light source comes from for example the sun or lamp |
| shadow vanishing point | a point directly under your light reference and on the horizon line on the ground |
| foreshortening | to shorten the lines of an object in a drawing or other representation so as to produce an illusion of projection |
| viewing point | the place where you are, your eye level |
| viewing angle | the place where you are, your eye level and the angle from your point of view |
| viewing height | the place where you are, at your eye level and height or elevation |
