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JSPMs

Rajarshi Shahu College of Engineering, Tathawde, Pune 33

Department of Information Technology2011-12

Mid Term Test Marking Scheme

Class: S.E Date: 07/02/12

Subject: Computer Graphics Max Marks: 50Time: 9.00 am to 10.30 am

Instructions: Draw neat diagrams wherever necessary.

Q1) Explain the concept of display file structure (10M)

Ans:Explaination with diagram 10 Marks

Q2) Draw and explain the following input devices:

1) Trackball 2) Joystick 3) Mouse 4) Light pen System

(8M)

Ans: 1) Explaination of Trackball with diagram ---2M

2) Explaination of Joystick with diagram ---2M

3) Explaination of Mouse with diagram---2M4) Explaination of Light Pen with diagram---2M

OR

Q3) Explain why Computer Graphics is emerging as an important

field in computer science (10M)

Ans: Explaination of computer graphics --5MExample ---5M

Q4) Write a short notes on: (8M)(1)Scanner (2) Digitizer (3) Display file Interpreter (4) Tablets

Ans: 1) Explaination of Scanner with diagram ---2M2) Explaination of Digitizer with diagram ---2M

3) Explaination of Display File Interpreter with diagram---2M

4) Explaination of Tablet with diagram---2M

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Q5)Explain Bresenhams line drawing algorithm. Using Bresenhams algorithm drawline from (1, 1) to (5, 3) (10M)

Ans:1) Explaination of Bresenhams line drawing algorithm ---6M

2) Drawing line from (1, 1) to (5, 3) ---- 4M

Q6) Explain Raster and Random Scan, Line and Text Style (8M)

Ans : 1) Explaination of Raster Scan ---2M

2) Explaination of Random Scan ---2M

3) Explaination of Line---2M4) Explaination of Text---2M

OR

Q7) Explain DDA line drawing algorithm. Using DDA algorithm draw line from (1, 1) to

(5,3) (10M)

Ans: 1) Explaination of DDA algorithm ---6M

2) Drawing line from (1, 1) to (5, 3) ---- 4M

Q8) What is pixel? What is the importance of using frame buffer? It is dynamic storagestructure? Differentiate between Bresenhams and Vector Generation Algorithm( (8M)

Ans: 1) Explaination of Pixel ---2M2) Dynamic storage structure-- 2M

3) Differentiate between Bresenhams and Vector Generation Algorithm 4M

Q9) Explain the followingcharacter generation techniques (8M)

(1)Stroke Method (2) Starburst Method (3) Bitmap Method

Ans : 1) Explaination of Stroke Method ---3M

2) Explaination of Starburst Method ---3M

3) Explaination of Bitmap Method----2M

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Q10) Explain w.r.t.2D transformation

(1)Scaling (2) Rotation (3) Translation (8M)

Ans : 1) Explaination of Scaling Technique ---3M

2) Explaination of Rotation Technique ----3M

3) Explaination of Translation Technique ---2M

OR

Q11) With neat diagram explain the concept of Monochrome and Color display

Monitor (8M)

Ans : 1) Explaination of Monochrome Display ---4M

2) Explaination of Colour Dia Technique ----3M

Q12) Explain Primitive Operation (8M)

Ans: Explanation of Primitive Operation with diagram -----8M