Differentiate between ambient light and diffuse reflection. Write algorithm for Phong Shading. [10]
2.
What are the disadvantages of flat shading? How they can be eliminated? [5]
Introduction and Overview of Graphics System
1.
How much time is spent scanning across each row of pixels during screen refresh on a raster system with resolution 1024*768 and refresh rate of 60 frames per second? [5]
2.
Differentiate between vector and raster scan systems. [5]
Output Primitives
1.
Write mid point circle drawing algorithm. [5]
2.
Derive the Bresenham's decision parameter to draw a line with negative slope. [5]
Three-Dimensional Graphics
1.
Obtain perspective projection co-ordinates for the pyramid with vertices of base (15, 15, 10), (20, 20, 10), (25, 15, 10), (20, 10, 10) and apex (20, 15, 2), given that Zprp = 20 and Zvp = 0. [10]
2.
Differentiate between parallel and perspective projection. [5]
Three-Dimensional Object Representation and Curve Modeling
1.
Define Hermite interpolation in defining a curve. Draw a line with end points (2, 3) and (12, 8) using DDA. [10]
2.
What are the conditions for error free generation of polygon table? [5]
3.
Write short notes on a. Vertex table b. Key frame [5]
Two Dimensional Geometric Transformations
1.
Prove that successive rotation is equal to addition of angles. [5]