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Gujarat Technological University: Instructions

This document contains instructions and questions for a Computer Graphics exam. It includes questions about key CG terms like aspect ratio, scan conversion, geometric primitives, and homogeneous coordinates. There are also questions about algorithms like Bresenham's line drawing algorithm, the midpoint circle algorithm, and 2D transformations. Questions cover topics such as computer aided design, digitizers, image processing, flat panel displays, antialiasing, 3D viewing pipelines, projections, and OpenGL functions.

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Swetang Khatri
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93 views2 pages

Gujarat Technological University: Instructions

This document contains instructions and questions for a Computer Graphics exam. It includes questions about key CG terms like aspect ratio, scan conversion, geometric primitives, and homogeneous coordinates. There are also questions about algorithms like Bresenham's line drawing algorithm, the midpoint circle algorithm, and 2D transformations. Questions cover topics such as computer aided design, digitizers, image processing, flat panel displays, antialiasing, 3D viewing pipelines, projections, and OpenGL functions.

Uploaded by

Swetang Khatri
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Seat No.

: ________

Enrolment No.______________

GUJARAT TECHNOLOGICAL UNIVERSITY


M.C.A -IVth SEMESTEREXAMINATION MAY- 2012

Subject code: 640008 Subject Name: Computer Graphics (CG) Time: 10:30 am 01:00 pm

Date: 19/05/2012 Total Marks: 70

Instructions:
1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. Q.1 (a) Explain the following terms 1) Aspect ratio 2) Scan conversion 3) Geometric primitives 4) Aliasing 5) Homogeneous coordinates 6) Viewport 7) Vanishing Point 14

Q.2

(a) Write generalized Bresenhams line drawing algorithm for all the cases of 05 slope. (b) Write the short note on following 09 1) Computer aided design 2) Mouse devices 3) Depth cueing OR (b) Write the short note on following 09 1) Image Processing 2) Digitizers 3) Exploded and cutaway views (a) Explain basic design and operation of cathode-ray tube. (b) Derive and explain Mid point circle algorithm for decision parameter. OR (a) What is flat panel display? Describe its categories and explain any one. (b) Digitize the Mid point ellipse algorithm for given input rx = 8 and ry = 6 07 07 07 07

Q.3

Q.3

Q.4

(a) Apply the transformation to square A(0,0), B(1,0), C(1,1) and D(0,1) given 05 below: a) Shear the original square with shear parameter value of 0.5 relative to the line yref = -1 b) Reflect the original square about the origin (b) 1) Describe antialiasing. Name different antialiasing 06 methods and explain any two. 2) Explain two dimensional scaling 03
OR

Q.4

(a) Find the transformation matrix that transforms the given square ABCD to 05 half its size with respect to selected fixed position (2,2) for the coordinates A (1,1), B(3,1), C(3,3) and D(1,3). Also get the resultant coordinates of the square ABCD. (b) 1) Derive and explain general three dimensional rotation of 06 an object for an arbitrary axis.
1

2) Explain flood fill algorithm Q.5 (a) Explain Liang-Barsky line clipping algorithm. (b) Write the short note on following 1) Three dimensional viewing pipeline 2) Orthogonal projections 3) Explain the following functions in OpenGL a. glMatrixMode (GL_PROJECTION) b. gluOrtho2D (xwmin, xwmax, ywmin, ywmax) c. glutInitDisplayMode(mode) OR (a) Explain Sutherland-Hodgman polygon clipping algorithm. (b) Write the short note on following 1) Three dimensional line clipping 2) Oblique parallel projections 3) What is OpenGL? Name its header files and explain any three polygon fill area function for drawing polygon.
*************

03 05 09

Q.5

05 09

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