Q13,p3,j15. Give the number of principal vanishing point along with their direction for the standard perspective transformation.

A)     Only one in direction K.

B)      Two in direction I,J.

C)      Three in direction I,J,k.

D)     Only two in direction j,K

Answer A.

Explanation.

As things get further away, from us, they seems smaller and closer together. When they get far enough away, distances become ever tinier and so form a  single point.