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```									                BIRLA INSTITUTE OF TECHNOLOGY AND SCIENCE, PILANI (RAJASTHAN)
First Semester, 2007-2008
Quiz (Set A)
______________________________________________________________________________________________________
Course Number                 : CS C471 / IS C471
Course Title                  : Computer Graphics
Date and Time                 : Oct 10, 2007 (12.00 Noon To 12.50 PM)
Weightage & Nature            : 20 Marks [Closed Book]

ID.No. _______________                                      Name: ______________________________

Marks Obtained: ________                                    Examiner’s Sign: ____________

Instructions
    Each question carries one mark. To answer, select exactly two choices, from the four options given and tick () the box
corresponding to the choices in the answer sheet provided to you (this sheet). Marks will be awarded only when both
choices will be selected correctly. Please put your signature at space provided in this sheet. Please do not write
anything on this answer sheet other than required entries.
    Please avoid overwriting. You can’t apply for recheck for overwritten answers.

Tick Exactly Two Choices                                              Q3. Which points will be highlighted next while we Mid-Point
scan-converting the line [(0,100), (200, 250)] starting from the
A    B    C   D                                                  point (200, 250)?
1                                                                         A. (199, 249)
2                                                                         B. (198, 248)
3                                                                         C. (200, 249)
4                                                                         D. (199, 248)
5
6                                                                    Q4. Which devices do have more than two layers?
7                                                                        A. CRT
B. DVST
8
C. Plasma Panel
9
D. LCD
10
11                                                                    Q5. Which devices can refresh at higher speeds?
12                                                                        A. DVST
13                                                                        B. Electro-phoretic
14                                                                        C. CRT
15                                                                        D. Plasma panel
16
17                                                                    Q6. Advantages of Plasma panel over Electro-phoretic devices:
18                                                                        A. Plasma panels are rugged
19                                                                        B. Plasma panels require less power
20                                                                        C. Plasma panels have higher resolution
D. Plasma panels are relatively less costly
Q1. Which points divide the line [(20,10), (50,70)] in ratio 1:2?
A. (30, 30)                                                       Q7. Which scan converting algorithms do generalize easily to
B. (80, 130)                                                      arbitrary conics?
C. (40, 50)                                                            A. Bresenham
D. (-10, -60)                                                          B. Mid-Point
C. Basic Incremental
Q2. Which points are on the line obtained by rotating the line             D. First-Order difference
[(10,20), (50,80)] by 45 degree about its mid-point?
A. (37.07, 14.64)                                                Q8. Which points are inside the polygon
B. (-65.36, 98.49)                                               [(0,0),(50,50),(75,75),(0,50)]?
C. (-51.21,27.78)                                                     A. (74,73)
D. (22.93, 85.36)                                                     B. (25,30)
C. (51,51)
D. ( 2, 1)
Q9. Which transformations commute if same is applied twice        Q15. Given clip region [(10 , 20), (100 , 80)]. Parameter values
successively?                                                     at which the line ((0,0,), (100,80)) intersects the clip region
A. Scaling                                                   internally are:
B. Reflection                                                     A. t = 0.5
C. Translation                                                    B. t = 0
D. Rotation                                                       C. t = 0.25
D. t = 1
Q10. Which projections are a bit more realistic than other two?
A. Cabinet                                                    Q16. End points of the line [(30,50), (60, 80)] after y-shear of 20
B. Perspective                                                    A. ( 30, 650)
C. Isometric                                                      B. ( 30, 750)
D. Orthographic                                                   C. ( 60, 1280)
D. (1289, 60)
Q11. Which are defined in VRC?
A. PRP                                                        Q17. Parametric Line Clipping is faster than Cohen’s (bitcode
B. VUP                                                        method) and analytical method of line clipping because:
C. VPN                                                            A. Calculation of intersections is postponed in Parametric
D. CW                                                                  method
B. Finding intersection involves floating point numbers in
Q12. Which two planes can be bounding planes for canonical                 analytical method
perspective view volume?                                              C. In Cohen’s method floating point intersection has to be
A. z = -0.5                                                           calculated at each iteration
B. z = -1                                                        D. Performance of Cohen’s method varies based on the
C. y = 0                                                              conventions regarding order of edges
D. x = z/2
Q18. True about the point (10,10) and the line [(8,3),(14,4)]
Q13. For which curves convex-hull property do hold?                   A. Reflection of the given point in the line is at (-10, -8)
A. Non-rational Hermite                                           B. The given point is to the left of line when moving from
B. Non-rational Bezier                                                 (2, 2) to (8, 3)
C. Rational Hermite                                               C. The given point is to the right of line when moving
D. Non-rational B-spline                                               from (2, 2) to (8, 3)
D. The shortest distance of the point from the line is 22
A. Rational curves are invariant under perspective            Q19. Which of the two allow a minimum of 4-point symmetry?
projection                                                   A. Hyperbola
B. Rational curves can define precisely any of the conic          B. Semi-circle
sections                                                     C. Parabola
C. Rational curves are invariant under translation and            D. Ellipse
rotation
D. Defining conics by Rational curves requires only cubic     Q20. Coordinates of the perspective projection of the end points
polynomials                                              of the line [(110,115,25), (120,125,130)] on the plane defined by
[(110,120,130),(120,110,140),(140,150,180)] when the center of
projection is the origin, are:
A. (-342, -258, -552)
B. (3885, 4185, 1275)
C. (3928, 4106, 4463)
D. ( 645, 672, 698)
BIRLA INSTITUTE OF TECHNOLOGY AND SCIENCE, PILANI (RAJASTHAN)
First Semester, 2007-2008
Quiz (Set B)
______________________________________________________________________________________________________
Course Number                  : CS C471 / IS C471
Course Title                   : Computer Graphics
Date and Time                  : Oct 10, 2007 (12.00 Noon To 12.50 PM)
Weightage & Nature             : 20 Marks [Closed Book]

ID.No. _______________                                        Name: ______________________________

Marks Obtained: ________                                      Examiner’s Sign: ____________

Instructions
    Each question carries one mark. To answer, select exactly two choices, from the four options given and tick () the box
corresponding to the choices in the answer sheet provided to you (this sheet). Marks will be awarded only when both
choices will be selected correctly. Please put your signature at space provided in this sheet. Please do not write
anything on this answer sheet other than required entries.
    Please avoid overwriting. You can’t apply for recheck for overwritten answers.

Tick Exactly Two Choices                                                Q3. True about the point (10,10) and the line [(8,3),(14,4)]
E. Reflection of the given point in the line is at (-10, -8)
A    B    C    D                                                       F. The given point is to the left of line when moving from
1                                                                               (2, 2) to (8, 3)
2                                                                          G. The given point is to the right of line when moving
3                                                                               from (2, 2) to (8, 3)
4                                                                          H. The shortest distance of the point from the line is 22
5
6                                                                      Q4. Which of the two allow a minimum of 4-point symmetry?
7                                                                          E. Hyperbola
8                                                                          F. Semi-circle
9                                                                          G. Parabola
H. Ellipse
10
11
Q5. Coordinates of the perspective projection of the end points of
12                                                                      the line [(110,115,25), (120,125,130)] on the plane defined by
13                                                                      [(110,120,130),(120,110,140),(140,150,180)] when the center of
14                                                                      projection is the origin, are:
15                                                                            E. (-342, -258, -552)
16                                                                            F. (3885, 4185, 1275)
17                                                                            G. (3928, 4106, 4463)
18                                                                            H. ( 645, 672, 698)
19
20                                                                      Q6. Which points divide the line [(20,10), (50,70)] in ratio 1:2?
E. (30, 30)
Q1. End points of the line [(30,50), (60, 80)] after y-shear of 20          F. (80, 130)
E. ( 30, 650)                                                           G. (40, 50)
F. ( 30, 750)                                                           H. (-10, -60)
G. ( 60, 1280)
H. (1289, 60)                                                       Q7. Which points are on the line obtained by rotating the line
[(10,20), (50,80)] by 45 degree about its mid-point?
Q2. Parametric Line Clipping is faster than Cohen’s (bitcode                 E. (37.07, 14.64)
method) and analytical method of line clipping because:                      F. (-65.36, 98.49)
E. Calculation of intersections is postponed in Parametric               G. (-51.21,27.78)
method                                                              H. (22.93, 85.36)
F. Finding intersection involves floating point numbers in
analytical method                                              Q8. Which points will be highlighted next while we Mid-Point
G. In Cohen’s method floating point intersection has to be          scan-converting the line [(0,100), (200, 250)] starting from the
calculated at each iteration                                   point (200, 250)?
H. Performance of Cohen’s method varies based on the                     E. (199, 249)
conventions regarding order of edges                                F. (198, 248)
G. (200, 249)
H. (199, 248)
Q9. Which devices do have more than two layers?                  Q15. Which projections are a bit more realistic than other two?
E. CRT                                                           E. Cabinet
F. DVST                                                          F. Perspective
G. Plasma Panel                                                  G. Isometric
H. LCD                                                           H. Orthographic

Q10. Which devices can refresh at higher speeds?                 Q16. Which are defined in VRC?
E. DVST                                                          E. PRP
F. Electro-phoretic                                              F. VUP
G. CRT                                                           G. VPN
H. Plasma panel                                                  H. CW

Q11. Advantages of Plasma panel over Electro-phoretic devices:   Q17. Which two planes can be bounding planes for canonical
E. Plasma panels are rugged                                  perspective view volume?
F. Plasma panels require less power                               E. z = -0.5
G. Plasma panels have higher resolution                           F. z = -1
H. Plasma panels are relatively less costly                       G. y = 0
H. x = z/2
Q12. Which scan converting algorithms do generalize easily to
arbitrary conics?                                                Q18. For which curves convex-hull property do hold?
E. Bresenham                                                    E. Non-rational Hermite
F. Mid-Point                                                    F. Non-rational Bezier
G. Basic Incremental                                            G. Rational Hermite
H. First-Order difference                                       H. Non-rational B-spline

Q13. Which points are inside the polygon                         Q19. True about rational curves:
[(0,0),(50,50),(75,75),(0,50)]?                                      E. Rational curves are invariant under perspective
E. (74,73)                                                           projection
F. (25,30)                                                      F. Rational curves can define precisely any of the conic
G. (51,51)                                                           sections
H. ( 2, 1)                                                      G. Rational curves are invariant under translation and
rotation
Q14. Which transformations commute if same is applied twice          H. Defining conics by Rational curves requires only cubic
successively?                                                             polynomials
E. Scaling
F. Reflection                                               Q20. Given clip region [(10 , 20), (100 , 80)]. Parameter values
G. Translation                                              at which the line ((0,0,), (100,80)) intersects the clip region
H. Rotation                                                 internally are:
A. t = 0.5
B. t = 0
C. t = 0.25
D. t = 1
Birla Institute of Technology and Science, Pilani (Rajasthan)
First Semester 2007-2008

CS C471 / IS C471 (Computer Graphics)                      Sept 28, 2007                    Project Work (10%)

Select the area, from the areas given below, as per the following expression:
Area = [(Last Three Digits of your IdNo) % 16]+1, where % evaluates integer remainder.

Areas:

1.    Raster Graphics Algorithms for Drawing 2D primitives           2.    Two Dimensional Transformations
3.    Viewing in 2D                                                  4.    Clipping in 2D
5.    Introduction to 3D- Graphics                                   6.    Curves
7.    Surfaces                                                       8.    Solid Modeling
9.    Three-Dimensional Transformations                              10.   Three-Dimensional Viewing
11.   Visible Surface detection methods                              12.   Light & Color Models
13.   Rendering methods                                              14.   Introduction to Animation Technique
15.   Advanced Modeling Techniques                                   16.   Drawing primitive 3D shapes

Search a paper published in any Journal or at Internet, which involves some work related to your area selected
above. Start working to implement a part of the work detailed out (or suggested) in the paper and submit the
required documents on the deadlines as given in the “Evaluation Table”. Unless specifically instructed to submit a
photo-copy, screen-print or printout, the documents must be emailed to instructor-in-charge.

Instructions for submission of the documents listed in the Evaluation Table:

   Complete the entries in the evaluation table.
   You should email these to rohil@bits-pilani.ac.in. Write your IDNo. and subject of the email as
“CG Project Dn”, where n is to be replaced by document number.
   Email the document by 05:00 PM.
   If any of the due date happens to be a holiday (or institute is closed due to some unforeseen condition) then
the due date will be the immediately next day.
   You will be able to submit the document by one week’s delay but then your document will be evaluated out
of 50% of the maximum marks (MM) of that document.
   Submission after a week’s time will be awarded no credit.
   A document will be evaluated only when you have submitted all earlier documents.
   The column marked “Sign” in the “Evaluation Table” is meant for examiner’s sign.
   After last document submission, please submit the printed (with completed entries) evaluation table to the
instructor-in-charge.
   For email, please give the filenames as your id number. For example if your id number is 2003A7PS013
then the file names should be as follows:

2003A7PS013.c (filename extensions as per programming language i.e. c, java, cpp, pl, pro)
2003A7PS013.ip1, 2003A7PS013.ip2, ... input files
2003A7PS013.op1, 2003A7PS013.op2, ... output files

After examining your source code and other files, some or all of you may be called for a demonstration
and/or viva.
ID No.                                         Name:

Selected Area:

Evaluation Table

SNo Document to be Submitted                             MM DueDate        Submitted    Pages Sign Marks
On
D1.   Abstract of the paper and two-pages stating the 2        Oct 12,
work you want to do. Relevant background study           2007
(only the required study work) and the list of
references

D2.   Introduction to the problem, which you intend to 2       Oct 26,
solve and the list of references in format specified     2007
in the Table “Contents of the Final Report”. A
document indicating “How to approach a
solution”. Design for the solution
D3.   Source code [and Sample input and output (if 3           Nov 14,
any)]. A document indicating Programming                 2007
language used, special software and hardware
requirements and “How to view the
demonstration”

D4.   Final report including the items given in the table 3    Nov 16,
“Contents of the Final Report”. You can reuse            2007
the text of above documents.

Table “Contents of the Final Report”

1. Cover Page indicating Area, Title of the paper, IdNo., Name, Course Number & Title, “Project Nov 2005”