Viewports, Clipping, and Projections Flashcards
1
Q
Truncated Viewing Frustrum
A
The truncated pyramid in world space that contains all the parts of the scene which will appear in the final perspective rendering.
2
Q
6 Properties of Projective Transformations
A
- Angles are not preserved
- Distances not preserved
- Ratios of distances not preserved
- Affine combinations not preserved
+ straight lines are mapped to straight lines
+ cross ratios are preserved
3
Q
Cross Ratio
A
On a line with four points the distances between any two points have the same ratios after a projective transformation
