UNIVERSITY EXAMINATIONS: 2013/2014
ORDINARY EXAMINATION FOR THE BACHELOR OF SCIENCE
IN INFORMATION TECHNOLOGY
BIT 2301A 2304 COMPUTER GRAPHICS
DATE: APRIL, 2014 TIME: 2 HOURS
INSTRUCTIONS: Answer Question ONE and any other TWO
QUESTION ONE:(30 MARKS)
a) List and discuss Six (6) major industrial consumers of Computer Graphics
Technology. (12 Marks)
b) Discuss the following terms as used in Computer Graphics.
i. Modeling
ii. Rendering
iii. Animation
(6 Marks)
c) Distinguish between the following types of CRT displays.
i. Vector Refresh Display
ii. Raster Refresh Display
(12 Marks)
QUESTION TWO:(20 MARKS)
a) Using diagrams, explain the following types of 2D linear transformations.
i) Scaling
ii) Shearing
iii) Rotation
iv) Reflection
(10 Marks)
b) Consider a raster system with the resolution of 1024 x 768 pixels and the color palette
calls for 65,536 colors. What is the minimum amount of video RAM that the
computer must have to support the above-mentioned resolution and number of
colors?
(10 Marks)
QUESTION THREE:(20 MARKS)
You have been appointed to head a team in developing a 3D computer game.
i) Outline your team composition in relation to the skill-set needed. (6 Marks)
ii) Outline the steps involved in a 3D game development.
(14 Marks)
QUESTION FOUR: (20 MARKS)
a) Explain the following concepts.
i) Radiosity
ii) Ray Tracing (10 Marks)
b) The architecture of a raster-graphics system is partly made up of the components
listed below. Briefly explain the function of the following components and terms as
used in image formation and display in the display device.
i. Display processor
ii. Frame Buffer
iii. Scan Conversion
iv. Video Controller
v. Display Processor Memory
(10 Marks)
QUESTION FIVE :(20 MARKS)
a) Describe four classical geometrical planar projections in computer graphics.
(10 Marks)
b) Given the View Reference Point VRP = (0,0,0), View Plane Normal VPN = (0,0,1),
View Up vector VUP = (0,1,0), Projection Reference Point PRP = (1,1,1), (umin, vmin)
= (2, 4), and (umax, vmax) = (6,8).
i. Calculate the direction of projection (DOP). (5 Marks)
ii. Approximately draw the parallel projection view volume. Explain your
answer. (5 Marks)
