In which type of visible-surface
detection Algorithms visibility is decided point by point at each pixel
position on the projection plane?
a) Object-Space methods
b) Image-Space methods
c) Both A and B
d) None of these
In the back-face detection algorithm, If V is along the positive Z direction than polygon is back face if --------(V = vector in viewing direction from eye, C = Plane constant)
a) C ≥ 0
b) C ≤ 0
c) C ≥ 1
d) C ≤ 1
Which is true for back-face detection?
a) The back-face detection algorithm is always working well for all polyhedron
b) The back-face detection algorithm always works for a concave polyhedron
c) The back-face detection algorithm always works for a convex polyhedron
d) All of these
Which of these is a visible surface detection algorithm?
a) Back-face detection
b) Back-face removal
c) Ray tracing
d) None of these
In the depth buffer method which buffer is/are used?
a) Depth buffer
b) Refresh buffer
c) Frame buffer
d) A and B both
Which surface algorithm is based on perspective depth?
a) Depth comparison
b) Z-buffer or depth-buffer algorithm
c) Subdivision method
d) Back-face removal
