NATIONAL OPEN UNIVERSITY OF NIGERIA
14-16 AHMADU BELLO WAY, VICTORIA ISLAND LAGOS
SCHOOL OF SCIENCE AND TECHNOLOGY
OCTOBER/NOVEMBER 2014 EXAMINATION
Course code: CIT 771
Course Title: Introduction to Computer Graphics and Animation
Time: 3 Hours
Instruction: Answer any Five (5) questions.
1. a) What is a computer graphics system (2 marks)
b) The applications of computer graphics are many and as such are classified into major areas. List the four major areas in which they are classified (4 marks)
c) Illustrate a graphic system using a detailed block diagram (8 marks)
2. a) What is raster graphics (2 marks)
b) Define the term “Light” and explain the following properties of light: reflection and refraction (8 Marks)
c) Given a point cloud, polygon, or sampled parametric curve, enumerate four purposes for which transformations can be used (4 marks)
3. a) In computer graphics what is high dynamic range imaging (HDRI) (2 Marks)
b) Briefly explain the Cognitive processes hypothesis (3 marks)
c) Briefly discuss the following (9 marks)
RGB Colour Model
HSV and HSL Colour model
CYMK Colour model.
4. a) Define Keyframing. Discuss two advantages and one disadvantages of Keyframing (5 marks)
b) Briefly discuss the following (9 marks)
Additive colour
Subtractive colour
Alpha Compositing
5. a) In your words briefly define Bi-directional Reflection Distribution Function (2 marks)
b) List and discuss the classes and properties of Bi-directional Reflection Distribution Function (BRDF) (12 marks)
6. a) Discuss the Cognitive process Hypothesis (4 Marks)
b) Discuss any five advantages and five disadvantages of motion capture (10 Marks)
7. a) Using a well labelled block diagram discuss geometric pipeline (8 marks)
b) In order to calculate surface radiance at an intersection point, one of the cached photon maps is used. Highlight the steps involved (6 marks)
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