NATIONAL OPEN UNIVERSITY OF NIGERIA,
91 CADASTRAL ZONES, NNAMDI AZIKIWE EXPRESSWAY, JABI, ABUJA.
FACULTY OF SCIENCES
JULY 2017 EXAMINATION.
COURSE CODE: CIT 771
COURSE TITLE: INTRODUCTION TO COMPUTER GRAPHICS AND ANIMATION
CREDIT UNIT: 3
TIME ALLOWED: 3 HOURS
INSTRUCTION: ANSWER QUESTION ONE (22 MARKS) AND ANY FOUR (12 MARKS EACH) QUESTIONS.
1.
a. What is a Bézier? (1 Mark)
b. In Vectors, highlight the Properties of Dot products and Cross Products (4 Marks)
c. Explain the following
d. State three Uses of bounding volumes (3 Marks)
e. State any five uses of NURBS curves and surfaces (5 Marks)
f. Illustrate using a well labelled diagram the thin lens model diagram. From the diagram write the equation for the thin lens model and explain the parameters where applicable. (6 Marks)
2.
a. Briefly discuss the terms graphics pipeline as it relates to 3D computer graphics (2 Marks)
Highlight and illustrate with diagrams (where applicable) the steps necessary to project a triangle from object space to the image plane (10 Marks)
3.
a. List six major elements in the Graphic system (3 Marks)
b. Discuss any three Related functions of BRFD (4 ½ Marks)
c. Discuss the three basic classes of transformations (4 ½ Marks)
4.
a. State three advantages and three disadvantages of Physically-based animation (6 Marks)
b. State and briefly discuss the types which Cognitive illusions are divided into. (6 Marks)
5.
a. What the steps in Calculating radiance at an intersection point using the photon map 9 (4 Marks)
Discuss the steps involved performing bump mapping using the method invented by Blinn which uses the height of the map for simulating the surface displacement (5 Marks)
c. Briefly Discuss the Two important properties of perspective projection (3 Marks)
6.
a. Define: “key frame” and Keyframing (2 Marks)
b. State two advantages and disadvantages of Keyframing (2 Marks)
c. Given a point cloud, polygon, or sampled parametric curve, state any two purposes for which use transformations can be used. (2 marks)
d. Briefly discuss the properties of Bézier curves (6 Marks)
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