​In 3D Graphics, which of the following statements about perspective and parallel projection is/are true ?

• P:​ In a perspective projection, the farthest an object is from the center of projection, the smaller it appears.
• Q: ​Parallel projection is equivalent to a perspective projection where the viewer is standing infinitely far away
• R:​ Perspective projections do not preserve straight lines.

(A) P and R only
(B) P, Q and R
(C) Q and R only
(D) P and Q only


Answer: (B)

Explanation: An important feature of perspective projections is that it preserves straight lines, this allows us to project only the end-points of 3D lines and then draw a 2D line between the projected endpoints.

All given statements are correct.

Option (B) is true.

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