14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS

SCHOOL OF SCIENCE AND TECHNOLOGY

MARCH/APRIL 2014 EXAMINATION

COURSE CODE: CIT 771

COURSE TITLE: ADVANCED COMPUTER GRAPHICS AND ANIMATION

TIME ALLOWED: 3 Hours

INSTRUCTION: Answer Any Five Questions

1. (a.) Define what you understand by BRDF. (4 Marks)

(b.) Explain the two properties of BRDFs. (6 Marks)

(c.) State two additional physically based BRDFs properties. (4 Marks)

2. (a.)What is a Vector? (5 Marks)

(b.) State two major difference between a point and a vector (6 Marks)

(c.)What is raster graphics? (3 Marks)

3. Explain the following colour models (14 Marks)

RGB colour model

YIQ colour model

CYMK colour model

HSV and HSL colour model

4. (a.) The applications of computer graphics are many and as such are classified into major areas. List three major area in which they are classified (6 marks)

(b.) Illustrate a graphic system using a detailed block diagram (8 marks)

5. (a.) What is light? (2 Marks)

(b.) Explain the following properties of light: reflection and refraction. (6 Marks)

(c.) Briefly explain colour concepts. (6 Marks)

6. (a.) Explain what is meant by motion capture. (4 marks)

(b.) State five advantages and five disadvantages of motion capture. (10 marks)

7. (a.) Discuss/Explain the Cognitive processes hypothesis (4 marks)

(b.) Discuss any 3 Processes of Traditional Animations (10 marks)

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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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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)
You can get the exam summary answers for this course from 08039407882

Check the sample below