6. Viewing 2:Projections Flashcards
What are the two classes of planar geometric projections?
- parallel
- perspective
What is a planar projection?
one that maps lines to lines
Types of parallel projection?
Orthographic & Axonometric
Types of Perspective projection?
1-point
2-point
3-point
What is a projection?
set of points at which the projectors intersect the projection plane
Why is it called parallel projection?
The projectors are parallel
What does orthographic mean?
ORTHES GONIES
to p plane
How many axes can you see at a time in a n orthographic projection?
2
Doe sthe projection plane in parallel projection have to be parallel to one of the world planes?
YES MA”AM
Difference between axonometric and parallel projection?
Projection plane can have any orientation
What is the difference in perspective projection?
eye point that projectors converge to
How to compute perspective?
Xp = x/(z/d) Yp = z/(z/d)
How is the field of view of the camera described?
3D View volume
What happens to objects out of view volume?
CLIP CLIP
