BIT 5th Semester
Computer Graphics Board Question Paper 2081

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BIT 304-2081 ✡
Tribhuvan University
Institute of Science and Technology
2081
✡
Bachelor Level/Third Year/Fifth Semester/Science
Bachelors in Information Technology (BIT 304)
(Computer Graphics)
Full Marks:60 Pass Marks:24 Time:3 hours

Candidates are required to give their answers in their own words as for as practicable.
The figures in the margin indicate full marks

Section A
Long Answer Questions
Attempt any Two question.
[2x10=20]
1.

Describe z-buffer method for visible surface detection. State its limitations and how these limitations can be reduced.

2.

What is the role of clipping? Plot the line with end points (20, 10) and (30, 18) using DDA.

3.

List the rotation matrix in clockwise direction with respect to x-axis, y-axis and z-axis. Rotate the object (0, 0, 0), (2, 3, 0), (5, 4, 0) about the rotation axis y = 4.

Section B

Attempt any Eight questions

[8x5=40]
4.

Write procedure to render the polygon surface by using Phong shading model.

5.

Explain about parametric cubic curve with its properties.

6.

Digitize circle with center (0, 0) and radius = 6.

7.

Explain the use of polygon tables for boundary representations.

8.

Differentiate between raster scan and random scan display systems.

9.

What is intensity attenuation? Describe the various types of projection.

10.

Explain about openGL and call back functions.

11.

How the geometric and attribute information of a 3D objects are stored for the object representations? Explain with suitable example.

12.

Write short notes on:
a) Ambient light
b) Diffuse reflection