Depth Buffer technique

Question

Describe the Depth Buffer technique in short? Also describe its features?

Answer 1

a) To compare surface depths at all pixel position on plane projection.

b) As well termed as z-buffer technique.

c) Contain two buffer areas: Depth buffer and Refresh buffer.

d) Depth value for the surface position (x, y): Z (-Ax – By – D)/C

e) Depth z’ of next position (x + 1, y): Z’ (-A(x + 1) -By – D)/C