### Exam Year

Tribhuvan University

Institute of Science and Technology

2079

Bachelor Level / third-semester / Science

Computer Science and Information Technology( CSC209 )

Computer Graphics

Full Marks: 60 + 20 + 20

Pass Marks: 24 + 8 + 8

Time: 3 Hours

Candidates are required to give their answers in their own words as far as practicable.

The figures in the margin indicate full marks.

Section A

Attempt any two questions.

1

Explain the working details of Mid-point circle algorithm? Trace the points along the line path having two end points (6,9) and (2,3) using Bresenham’s line drawing algorithm.

2

Differentiate between object space and image space methods of hidden surface removal. Describe the Z-buffer hidden surface removal algorithm.

3

Write the algorithm for Cohen-Sutherland Line clipping. Clip the polygon A(100,150), B(200,250) and C(300,200) with the clipping window defined by the coordinates (100,300), (300,300) and (200,100) using Sutherland Hodgeman Polygon Clipping algorithm.

Section B

Attempt any eight questions.

4

Reflect a line segment having endpoints (9,3) and (12,10) about a line Y=7. Draw initial and final result graph as well.

5

Differentiate between raster and vector graphics method.

6

Explain about parametric curve. Describe the properties of Bezier curve.

7

What are blobby objects? How it is represented? Explain the wireframe representation of 3D objects.

8

Calculate the total memory required to store a 8 minute video in a SVGA system with 24 bit true color and 25 fps.

9

Find the composite transformation matrix for reflection about a line y=mx+c.

10

What is polygon table? Explain the use of this method in 3D object representation.

11