NPTEL Computer Graphics Week 6 Assignment Answers 2024

NPTEL Computer Graphics Week 6 Assignment Answers 2024

1. In the Cohen-Sutherland algorithm, how many bit codes are used to represent a region?

a. 2-bit
b. 4-bit
c. 8-bit
d. 16-bit

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2. Match the following.

I. Line A. Sutherland-Hodgeman algorithm
II. Convex fill-area B. Cohen-Sutherland algorithm
III. Convex and concave fill-area C. Weiler-Atherton Algorithm

a. I-A, II-B, III-C
b. I-B, II-A, III-C
c. I-C, II-B, III-A
d. I-A, II-C, III-B

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3. Cohen-Sutherland line clipping algorithm in 3D divides the view coordinate space into _ coded regions.

a. 4
b. 9
c. 16
d. 27

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4. ‘Back Face Elimination’ is required for ________.

a. hidden surface removal
b. fill-area clipping
c. both hidden surface removal and fill-area clipping
d. none of the above

Answer :- 

5. HSR method broadly of TWO types: ________space method and image space method

a. unhidden
b. plane
c. hidden
d. object

Answer :- 

6. The Z-buffer method can be used on transparent surfaces for hidden surface removal.

a. True
b. False

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7. Coherence properties in hidden surface removal include:

a. Object coherence
b. Depth coherence
c. Texture coherence
d. Frame coherence

Answer :- 

8. Depth Sorting (Painter’s) algorithm works at

a. image space
b. object space
c. both image and object spaces
d. neither image space not object space

Answer :- 

9. Warnock’s Algorithm is a _____________ method. clipping area subdivision

a. clipping
b. area subdivision

Answer :- 

10. In Warnock’s Algorithm, if the current square region does not contain any surface, we assign the background color.

a. True
b. False

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