Here we are providing sample paper of Computer Graphics. you will preparing the examination on this paper, Computer Graphics is thought in the sixth semester in B.TECH course offered by UTTARAKHAND TECHNICAL UNIVERSITY (UTU).

## Sample Paper of Computer Graphics for B.TECH (UTU)

**B.TECH**

**SIXTH SEMESTER EXAMINATION, 2010-11**

**COMPUTER GRAPHICS**

**Time Duration:- Three Hours. Total Marks:-100**

**Instruction: – Attempt all questions. **

**Q1. Answer any four questions:** **(5*4=20)**

(a). Write a general function for Resterization.

(b). Explain the role of pixel and frame buffer in graphics devices.

(c). How much time is spent scanning across each row of pixels during screen refresh on a raster system with resolution of and refresh rate of 60 frames per second?

(d). Consider two raster systems with resolution of and . How many pixels could be accessed per second in each of these systems by a display controller that refreshes the screen at a rate of 60 frames per second?

(e). Explain how to display file structure and control test.

(f). Compare the computation done in Digital Difference Analyzer (DDA) algorithm with Bresenham’s line drawing algorithm.

**Q2. Attempt any three part of the following: (3*10****=30)**

(a). The sum of a point and a vector is well defined, but is it a point or a vector? Explain with proper sketches.

(b). What is a curve interpolation? As far as Splines are concerned, what do Hermite, Bezier and B-Splines curves indicate?

(c). Explain parametric representation of geometry with examples.

(d). Explain in detail different illumination metods and different Randering methods.

**Q3. Answer any two questions** **(2*10=20)**

(a). What is event handling enchoing? Explain in details with examples.

(b). Write the algorithm for filling polygons and explain it with a suitable example.

(c). what are the various logical graphics input primitives. What is the various input modes in which they work?

**Q4. Attempt any three questions** ** (3*10=30)**

(a). Derive simple illumination model. Include the contribution of Diffuse, ambient and specular reflaction.

(b). Which clopping algorithm is best suited for hardware implementation? Give how the algorithm works.

(c). Defining vanishing points. Is the location of vanishing point directly related to the giving point? Explain how?

(d). What is Segmentation? Give an example of a Segmentation table.

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